[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.66 by root, Sun Nov 4 23:30:53 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>
7		63
8	#include <stdio.h>	64	#include <stdio.h>
9		65
10	#include <assert.h>	66	#include <assert.h>
11	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
12	#include <sys/time.h>	72	#include <sys/time.h>
13	#include <time.h>	73	#include <time.h>
14		74
15	#define HAVE_EPOLL 1	75	/**/
16		76
17	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
18	# ifdef CLOCK_MONOTONIC
19	# define HAVE_MONOTONIC 1	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
20	# endif	102	# endif
21	#endif	103	#endif
22		104
23	#ifndef HAVE_SELECT
24	# define HAVE_SELECT 1
25	#endif
26
27	#ifndef HAVE_EPOLL
28	# define HAVE_EPOLL 0
29	#endif
30
31	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
33	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
34		122
35	#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) */
36	#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 */
37		127
38	#include "ev.h"	128	#include "ev.h"
		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)
39		143
40	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
41	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
42	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
43		147
44	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
45	ev_tstamp ev_now;
46	int ev_method;
47
48	static int have_monotonic; /* runtime */
49
50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
51	static void (*method_modify)(int fd, int oev, int nev);
52	static void (*method_poll)(ev_tstamp timeout);
53		149
54	/*****************************************************************************/	150	/*****************************************************************************/
55		151
56	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
57	ev_time (void)	186	ev_time (void)
58	{	187	{
59	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
60	struct timespec ts;	189	struct timespec ts;
61	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
62	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
63	#else	192	#else
64	struct timeval tv;	193	struct timeval tv;
65	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
66	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
67	#endif	196	#endif
68	}	197	}
69		198
70	static ev_tstamp	199	inline ev_tstamp
71	get_clock (void)	200	get_clock (void)
72	{	201	{
73	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
74	if (have_monotonic)	203	if (expect_true (have_monotonic))
75	{	204	{
76	struct timespec ts;	205	struct timespec ts;
77	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
78	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
79	}	208	}
80	#endif	209	#endif
81		210
82	return ev_time ();	211	return ev_time ();
83	}	212	}
84		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		221
85	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
86	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
87	{ \	224	{ \
88	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
		226	do \
		227	{ \
		228	newcnt = array_roundsize (base, newcnt << 1); \
		229	} \
		230	while ((cnt) > newcnt); \
		231	\
89	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
90	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	234	cur = newcnt; \
92	}	235	}
93		236
		237	#define array_free(stem, idx) \
		238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		239
94	/*****************************************************************************/	240	/*****************************************************************************/
95		241
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	242	static void
109	anfds_init (ANFD *base, int count)	243	anfds_init (ANFD *base, int count)
110	{	244	{
111	while (count--)	245	while (count--)
112	{	246	{
113	base->head = 0;	247	base->head = 0;
114	base->wev = base->rev = EV_NONE;	248	base->events = EV_NONE;
		249	base->reify = 0;
		250
115	++base;	251	++base;
116	}	252	}
117	}	253	}
118		254
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void	255	static void
129	event (W w, int events)	256	event (EV_P_ W w, int events)
130	{	257	{
131	if (w->active)	258	if (w->pending)
132	{	259	{
133	w->pending = ++pendingcnt;
134	array_needsize (pendings, pendingmax, pendingcnt, );
135	pendings [pendingcnt - 1].w = w;
136	pendings [pendingcnt - 1].events = events;	260	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		261	return;
137	}	262	}
138	}
139		263
		264	w->pending = ++pendingcnt [ABSPRI (w)];
		265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		266	pendings [ABSPRI (w)][w->pending - 1].w = w;
		267	pendings [ABSPRI (w)][w->pending - 1].events = events;
		268	}
		269
140	static void	270	static void
		271	queue_events (EV_P_ W *events, int eventcnt, int type)
		272	{
		273	int i;
		274
		275	for (i = 0; i < eventcnt; ++i)
		276	event (EV_A_ events [i], type);
		277	}
		278
		279	static void
141	fd_event (int fd, int events)	280	fd_event (EV_P_ int fd, int events)
142	{	281	{
143	ANFD *anfd = anfds + fd;	282	ANFD *anfd = anfds + fd;
144	struct ev_io *w;	283	struct ev_io *w;
145		284
146	for (w = anfd->head; w; w = w->next)	285	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
147	{	286	{
148	int ev = w->events & events;	287	int ev = w->events & events;
149		288
150	if (ev)	289	if (ev)
151	event ((W)w, ev);	290	event (EV_A_ (W)w, ev);
152	}	291	}
153	}	292	}
154		293
		294	/*****************************************************************************/
		295
155	static void	296	static void
156	queue_events (W *events, int eventcnt, int type)	297	fd_reify (EV_P)
157	{	298	{
158	int i;	299	int i;
159		300
160	for (i = 0; i < eventcnt; ++i)	301	for (i = 0; i < fdchangecnt; ++i)
161	event (events [i], type);	302	{
		303	int fd = fdchanges [i];
		304	ANFD *anfd = anfds + fd;
		305	struct ev_io *w;
		306
		307	int events = 0;
		308
		309	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		310	events \|= w->events;
		311
		312	anfd->reify = 0;
		313
		314	method_modify (EV_A_ fd, anfd->events, events);
		315	anfd->events = events;
		316	}
		317
		318	fdchangecnt = 0;
		319	}
		320
		321	static void
		322	fd_change (EV_P_ int fd)
		323	{
		324	if (anfds [fd].reify \|\| fdchangecnt < 0)
		325	return;
		326
		327	anfds [fd].reify = 1;
		328
		329	++fdchangecnt;
		330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		331	fdchanges [fdchangecnt - 1] = fd;
		332	}
		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		343	}
		344	}
		345
		346	/* called on EBADF to verify fds */
		347	static void
		348	fd_ebadf (EV_P)
		349	{
		350	int fd;
		351
		352	for (fd = 0; fd < anfdmax; ++fd)
		353	if (anfds [fd].events)
		354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		355	fd_kill (EV_A_ fd);
		356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
		366	{
		367	close (fd);
		368	fd_kill (EV_A_ fd);
		369	return;
		370	}
		371	}
		372
		373	/* susually called after fork if method needs to re-arm all fds from scratch */
		374	static void
		375	fd_rearm_all (EV_P)
		376	{
		377	int fd;
		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
162	}	386	}
163		387
164	/*****************************************************************************/	388	/*****************************************************************************/
165		389
166	static struct ev_timer **timers;
167	static int timermax, timercnt;
168
169	static struct ev_periodic **periodics;
170	static int periodicmax, periodiccnt;
171
172	static void	390	static void
173	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
174	{	392	{
175	WT w = timers [k];	393	WT w = heap [k];
176		394
177	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
178	{	396	{
179	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
180	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
181	k >>= 1;	399	k >>= 1;
182	}	400	}
183		401
184	timers [k] = w;	402	heap [k] = w;
185	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
186		404
187	}	405	}
188		406
189	static void	407	static void
190	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
191	{	409	{
192	WT w = timers [k];	410	WT w = heap [k];
193		411
194	while (k < (N >> 1))	412	while (k < (N >> 1))
195	{	413	{
196	int j = k << 1;	414	int j = k << 1;
197		415
198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
199	++j;	417	++j;
200		418
201	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
202	break;	420	break;
203		421
204	timers [k] = timers [j];	422	heap [k] = heap [j];
205	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
206	k = j;	424	k = j;
207	}	425	}
208		426
209	timers [k] = w;	427	heap [k] = w;
210	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
211	}	429	}
212		430
213	/*****************************************************************************/	431	/*****************************************************************************/
214		432
215	typedef struct	433	typedef struct
216	{	434	{
217	struct ev_signal *head;	435	struct ev_watcher_list *head;
218	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
219	} ANSIG;	437	} ANSIG;
220		438
221	static ANSIG *signals;	439	static ANSIG *signals;
222	static int signalmax;	440	static int signalmax;
223		441
224	static int sigpipe [2];	442	static int sigpipe [2];
225	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
226	static struct ev_io sigev;	444	static struct ev_io sigev;
227		445
228	static void	446	static void
229	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
230	{	448	{
231	while (count--)	449	while (count--)
232	{	450	{
233	base->head = 0;	451	base->head = 0;
234	base->gotsig = 0;	452	base->gotsig = 0;
		453
235	++base;	454	++base;
236	}	455	}
237	}	456	}
238		457
239	static void	458	static void
…		…
241	{	460	{
242	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
243		462
244	if (!gotsig)	463	if (!gotsig)
245	{	464	{
		465	int old_errno = errno;
246	gotsig = 1;	466	gotsig = 1;
247	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
248	}	469	}
249	}	470	}
250		471
251	static void	472	static void
252	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
253	{	474	{
254	struct ev_signal *w;	475	struct ev_watcher_list *w;
255	int sig;	476	int signum;
256		477
		478	read (sigpipe [0], &revents, 1);
257	gotsig = 0;	479	gotsig = 0;
258	read (sigpipe [0], &revents, 1);
259		480
260	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
261	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
262	{	483	{
263	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
264		485
265	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
266	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
267	}	488	}
268	}	489	}
269		490
270	static void	491	static void
271	siginit (void)	492	siginit (EV_P)
272	{	493	{
		494	#ifndef WIN32
273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
275		497
276	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
279		502
280	evio_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
281	evio_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
282	}	506	}
283		507
284	/*****************************************************************************/	508	/*****************************************************************************/
285		509
286	static struct ev_idle **idles;	510	#ifndef WIN32
287	static int idlemax, idlecnt;
288		511
289	static struct ev_check **checks;	512	static struct ev_child *childs [PID_HASHSIZE];
290	static int checkmax, checkcnt;	513	static struct ev_signal childev;
		514
		515	#ifndef WCONTINUED
		516	# define WCONTINUED 0
		517	#endif
		518
		519	static void
		520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		521	{
		522	struct ev_child *w;
		523
		524	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		525	if (w->pid == pid \|\| !w->pid)
		526	{
		527	ev_priority (w) = ev_priority (sw); /* need to do it now */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
		537	int pid, status;
		538
		539	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		540	{
		541	/* make sure we are called again until all childs have been reaped */
		542	event (EV_A_ (W)sw, EV_SIGNAL);
		543
		544	child_reap (EV_A_ sw, pid, pid, status);
		545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
		547	}
		548
		549	#endif
291		550
292	/*****************************************************************************/	551	/*****************************************************************************/
293		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
294	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
295	# include "ev_epoll.c"	557	# include "ev_epoll.c"
296	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
297	#if HAVE_SELECT	562	#if EV_USE_SELECT
298	# include "ev_select.c"	563	# include "ev_select.c"
299	#endif	564	#endif
300		565
301	int ev_init (int flags)	566	int
		567	ev_version_major (void)
302	{	568	{
		569	return EV_VERSION_MAJOR;
		570	}
		571
		572	int
		573	ev_version_minor (void)
		574	{
		575	return EV_VERSION_MINOR;
		576	}
		577
		578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
		581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	\|\| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
		599	if (!method)
		600	{
303	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
304	{	602	{
305	struct timespec ts;	603	struct timespec ts;
306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
307	have_monotonic = 1;	605	have_monotonic = 1;
308	}	606	}
309	#endif	607	#endif
310		608
311	ev_now = ev_time ();	609	rt_now = ev_time ();
312	now = get_clock ();	610	mn_now = get_clock ();
313	diff = ev_now - now;	611	now_floor = mn_now;
		612	rtmn_diff = rt_now - mn_now;
314		613
		614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
		618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_EPOLL
		628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		632	#endif
		633	#if EV_USE_SELECT
		634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		635	#endif
		636	}
		637	}
		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	int i;
		643
		644	#if EV_USE_WIN32
		645	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		646	#endif
		647	#if EV_USE_KQUEUE
		648	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		649	#endif
		650	#if EV_USE_EPOLL
		651	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		652	#endif
		653	#if EV_USE_POLL
		654	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		655	#endif
		656	#if EV_USE_SELECT
		657	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		658	#endif
		659
		660	for (i = NUMPRI; i--; )
		661	array_free (pending, [i]);
		662
		663	array_free (fdchange, );
		664	array_free (timer, );
		665	array_free (periodic, );
		666	array_free (idle, );
		667	array_free (prepare, );
		668	array_free (check, );
		669
		670	method = 0;
		671	/TODO/
		672	}
		673
		674	void
		675	loop_fork (EV_P)
		676	{
		677	/TODO/
		678	#if EV_USE_EPOLL
		679	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		680	#endif
		681	#if EV_USE_KQUEUE
		682	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		683	#endif
		684	}
		685
		686	#if EV_MULTIPLICITY
		687	struct ev_loop *
		688	ev_loop_new (int methods)
		689	{
		690	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		691
		692	loop_init (EV_A_ methods);
		693
		694	if (ev_method (EV_A))
		695	return loop;
		696
		697	return 0;
		698	}
		699
		700	void
		701	ev_loop_destroy (EV_P)
		702	{
		703	loop_destroy (EV_A);
		704	free (loop);
		705	}
		706
		707	void
		708	ev_loop_fork (EV_P)
		709	{
		710	loop_fork (EV_A);
		711	}
		712
		713	#endif
		714
		715	#if EV_MULTIPLICITY
		716	struct ev_loop default_loop_struct;
		717	static struct ev_loop *default_loop;
		718
		719	struct ev_loop *
		720	#else
		721	static int default_loop;
		722
		723	int
		724	#endif
		725	ev_default_loop (int methods)
		726	{
		727	if (sigpipe [0] == sigpipe [1])
315	if (pipe (sigpipe))	728	if (pipe (sigpipe))
316	return 0;	729	return 0;
317		730
318	ev_method = EVMETHOD_NONE;	731	if (!default_loop)
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
321	#endif
322	#if HAVE_SELECT
323	if (ev_method == EVMETHOD_NONE) select_init (flags);
324	#endif
325
326	if (ev_method)
327	{	732	{
		733	#if EV_MULTIPLICITY
		734	struct ev_loop *loop = default_loop = &default_loop_struct;
		735	#else
		736	default_loop = 1;
		737	#endif
		738
		739	loop_init (EV_A_ methods);
		740
		741	if (ev_method (EV_A))
		742	{
328	evw_init (&sigev, sigcb);	743	ev_watcher_init (&sigev, sigcb);
		744	ev_set_priority (&sigev, EV_MAXPRI);
329	siginit ();	745	siginit (EV_A);
330	}
331		746
332	return ev_method;	747	#ifndef WIN32
333	}	748	ev_signal_init (&childev, childcb, SIGCHLD);
334		749	ev_set_priority (&childev, EV_MAXPRI);
335	/*****************************************************************************/	750	ev_signal_start (EV_A_ &childev);
336		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
337	void ev_prefork (void)
338	{
339	/* nop */
340	}
341
342	void ev_postfork_parent (void)
343	{
344	/* nop */
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif	752	#endif
		753	}
		754	else
		755	default_loop = 0;
		756	}
353		757
		758	return default_loop;
		759	}
		760
		761	void
		762	ev_default_destroy (void)
		763	{
		764	#if EV_MULTIPLICITY
		765	struct ev_loop *loop = default_loop;
		766	#endif
		767
		768	ev_ref (EV_A); /* child watcher */
		769	ev_signal_stop (EV_A_ &childev);
		770
		771	ev_ref (EV_A); /* signal watcher */
354	evio_stop (&sigev);	772	ev_io_stop (EV_A_ &sigev);
		773
		774	close (sigpipe [0]); sigpipe [0] = 0;
		775	close (sigpipe [1]); sigpipe [1] = 0;
		776
		777	loop_destroy (EV_A);
		778	}
		779
		780	void
		781	ev_default_fork (void)
		782	{
		783	#if EV_MULTIPLICITY
		784	struct ev_loop *loop = default_loop;
		785	#endif
		786
		787	loop_fork (EV_A);
		788
		789	ev_io_stop (EV_A_ &sigev);
355	close (sigpipe [0]);	790	close (sigpipe [0]);
356	close (sigpipe [1]);	791	close (sigpipe [1]);
357	pipe (sigpipe);	792	pipe (sigpipe);
		793
		794	ev_ref (EV_A); /* signal watcher */
358	siginit ();	795	siginit (EV_A);
359	}	796	}
360		797
361	/*****************************************************************************/	798	/*****************************************************************************/
362		799
363	static void	800	static void
364	fd_reify (void)	801	call_pending (EV_P)
365	{	802	{
366	int i;	803	int pri;
367		804
368	for (i = 0; i < fdchangecnt; ++i)	805	for (pri = NUMPRI; pri--; )
369	{	806	while (pendingcnt [pri])
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{	807	{
381	method_modify (fd, anfd->wev, wev);	808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
382	anfd->wev = wev;
383	}
384	}
385		809
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)	810	if (p->w)
399	{	811	{
400	p->w->pending = 0;	812	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	813	p->w->cb (EV_A_ p->w, p->events);
402	}	814	}
403	}	815	}
404
405	pendingcnt = 0;
406	}	816	}
407		817
408	static void	818	static void
409	timers_reify ()	819	timers_reify (EV_P)
410	{	820	{
411	while (timercnt && timers [0]->at <= now)	821	while (timercnt && ((WT)timers [0])->at <= mn_now)
412	{	822	{
413	struct ev_timer *w = timers [0];	823	struct ev_timer *w = timers [0];
414		824
415	event ((W)w, EV_TIMEOUT);	825	assert (("inactive timer on timer heap detected", ev_is_active (w)));
416		826
417	/* first reschedule or stop timer */	827	/* first reschedule or stop timer */
418	if (w->repeat)	828	if (w->repeat)
419	{	829	{
		830	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
420	w->at = now + w->repeat;	831	((WT)w)->at = mn_now + w->repeat;
421	assert (("timer timeout in the past, negative repeat?", w->at > now));
422	downheap ((WT *)timers, timercnt, 0);	832	downheap ((WT *)timers, timercnt, 0);
423	}	833	}
424	else	834	else
425	evtimer_stop (w); /* nonrepeating: stop timer */	835	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
426	}
427	}
428		836
		837	event (EV_A_ (W)w, EV_TIMEOUT);
		838	}
		839	}
		840
429	static void	841	static void
430	periodics_reify ()	842	periodics_reify (EV_P)
431	{	843	{
432	while (periodiccnt && periodics [0]->at <= ev_now)	844	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
433	{	845	{
434	struct ev_periodic *w = periodics [0];	846	struct ev_periodic *w = periodics [0];
		847
		848	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
435		849
436	/* first reschedule or stop timer */	850	/* first reschedule or stop timer */
437	if (w->interval)	851	if (w->interval)
438	{	852	{
439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	853	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	854	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
441	downheap ((WT *)periodics, periodiccnt, 0);	855	downheap ((WT *)periodics, periodiccnt, 0);
442	}	856	}
443	else	857	else
444	evperiodic_stop (w); /* nonrepeating: stop timer */	858	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
445		859
446	event ((W)w, EV_TIMEOUT);	860	event (EV_A_ (W)w, EV_PERIODIC);
447	}	861	}
448	}	862	}
449		863
450	static void	864	static void
451	periodics_reschedule (ev_tstamp diff)	865	periodics_reschedule (EV_P)
452	{	866	{
453	int i;	867	int i;
454		868
455	/* adjust periodics after time jump */	869	/* adjust periodics after time jump */
456	for (i = 0; i < periodiccnt; ++i)	870	for (i = 0; i < periodiccnt; ++i)
457	{	871	{
458	struct ev_periodic *w = periodics [i];	872	struct ev_periodic *w = periodics [i];
459		873
460	if (w->interval)	874	if (w->interval)
461	{	875	{
462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	876	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
463		877
464	if (fabs (diff) >= 1e-4)	878	if (fabs (diff) >= 1e-4)
465	{	879	{
466	evperiodic_stop (w);	880	ev_periodic_stop (EV_A_ w);
467	evperiodic_start (w);	881	ev_periodic_start (EV_A_ w);
468		882
469	i = 0; /* restart loop, inefficient, but time jumps should be rare */	883	i = 0; /* restart loop, inefficient, but time jumps should be rare */
470	}	884	}
471	}	885	}
472	}	886	}
473	}	887	}
474		888
		889	inline int
		890	time_update_monotonic (EV_P)
		891	{
		892	mn_now = get_clock ();
		893
		894	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		895	{
		896	rt_now = rtmn_diff + mn_now;
		897	return 0;
		898	}
		899	else
		900	{
		901	now_floor = mn_now;
		902	rt_now = ev_time ();
		903	return 1;
		904	}
		905	}
		906
475	static void	907	static void
476	time_update ()	908	time_update (EV_P)
477	{	909	{
478	int i;	910	int i;
479		911
480	ev_now = ev_time ();	912	#if EV_USE_MONOTONIC
481
482	if (have_monotonic)	913	if (expect_true (have_monotonic))
483	{	914	{
484	ev_tstamp odiff = diff;	915	if (time_update_monotonic (EV_A))
485
486	for (i = 4; --i; ) /* loop a few times, before making important decisions */
487	{	916	{
488	now = get_clock ();	917	ev_tstamp odiff = rtmn_diff;
		918
		919	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		920	{
489	diff = ev_now - now;	921	rtmn_diff = rt_now - mn_now;
490		922
491	if (fabs (odiff - diff) < MIN_TIMEJUMP)	923	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
492	return; /* all is well */	924	return; /* all is well */
493		925
494	ev_now = ev_time ();	926	rt_now = ev_time ();
		927	mn_now = get_clock ();
		928	now_floor = mn_now;
		929	}
		930
		931	periodics_reschedule (EV_A);
		932	/* no timer adjustment, as the monotonic clock doesn't jump */
		933	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
495	}	934	}
496
497	periodics_reschedule (diff - odiff);
498	/* no timer adjustment, as the monotonic clock doesn't jump */
499	}	935	}
500	else	936	else
		937	#endif
501	{	938	{
502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	939	rt_now = ev_time ();
		940
		941	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
503	{	942	{
504	periodics_reschedule (ev_now - now);	943	periodics_reschedule (EV_A);
505		944
506	/* adjust timers. this is easy, as the offset is the same for all */	945	/* adjust timers. this is easy, as the offset is the same for all */
507	for (i = 0; i < timercnt; ++i)	946	for (i = 0; i < timercnt; ++i)
508	timers [i]->at += diff;	947	((WT)timers [i])->at += rt_now - mn_now;
509	}	948	}
510		949
511	now = ev_now;	950	mn_now = rt_now;
512	}	951	}
513	}	952	}
514		953
515	int ev_loop_done;	954	void
		955	ev_ref (EV_P)
		956	{
		957	++activecnt;
		958	}
516		959
		960	void
		961	ev_unref (EV_P)
		962	{
		963	--activecnt;
		964	}
		965
		966	static int loop_done;
		967
		968	void
517	void ev_loop (int flags)	969	ev_loop (EV_P_ int flags)
518	{	970	{
519	double block;	971	double block;
520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	972	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
521
522	if (checkcnt)
523	{
524	queue_events ((W *)checks, checkcnt, EV_CHECK);
525	call_pending ();
526	}
527		973
528	do	974	do
529	{	975	{
		976	/* queue check watchers (and execute them) */
		977	if (expect_false (preparecnt))
		978	{
		979	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		980	call_pending (EV_A);
		981	}
		982
530	/* update fd-related kernel structures */	983	/* update fd-related kernel structures */
531	fd_reify ();	984	fd_reify (EV_A);
532		985
533	/* calculate blocking time */	986	/* calculate blocking time */
534		987
535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	988	/* we only need this for !monotonic clockor timers, but as we basically
		989	always have timers, we just calculate it always */
		990	#if EV_USE_MONOTONIC
		991	if (expect_true (have_monotonic))
		992	time_update_monotonic (EV_A);
		993	else
		994	#endif
		995	{
536	ev_now = ev_time ();	996	rt_now = ev_time ();
		997	mn_now = rt_now;
		998	}
537		999
538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1000	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
539	block = 0.;	1001	block = 0.;
540	else	1002	else
541	{	1003	{
542	block = MAX_BLOCKTIME;	1004	block = MAX_BLOCKTIME;
543		1005
544	if (timercnt)	1006	if (timercnt)
545	{	1007	{
546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1008	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
547	if (block > to) block = to;	1009	if (block > to) block = to;
548	}	1010	}
549		1011
550	if (periodiccnt)	1012	if (periodiccnt)
551	{	1013	{
552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1014	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
553	if (block > to) block = to;	1015	if (block > to) block = to;
554	}	1016	}
555		1017
556	if (block < 0.) block = 0.;	1018	if (block < 0.) block = 0.;
557	}	1019	}
558		1020
559	method_poll (block);	1021	method_poll (EV_A_ block);
560		1022
561	/* update ev_now, do magic */	1023	/* update rt_now, do magic */
562	time_update ();	1024	time_update (EV_A);
563		1025
564	/* queue pending timers and reschedule them */	1026	/* queue pending timers and reschedule them */
		1027	timers_reify (EV_A); /* relative timers called last */
565	periodics_reify (); /* absolute timers first */	1028	periodics_reify (EV_A); /* absolute timers called first */
566	timers_reify (); /* relative timers second */
567		1029
568	/* queue idle watchers unless io or timers are pending */	1030	/* queue idle watchers unless io or timers are pending */
569	if (!pendingcnt)	1031	if (!pendingcnt)
570	queue_events ((W *)idles, idlecnt, EV_IDLE);	1032	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
571		1033
572	/* queue check and possibly idle watchers */	1034	/* queue check watchers, to be executed first */
		1035	if (checkcnt)
573	queue_events ((W *)checks, checkcnt, EV_CHECK);	1036	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
574		1037
575	call_pending ();	1038	call_pending (EV_A);
576	}	1039	}
577	while (!ev_loop_done);	1040	while (activecnt && !loop_done);
578		1041
579	if (ev_loop_done != 2)	1042	if (loop_done != 2)
580	ev_loop_done = 0;	1043	loop_done = 0;
		1044	}
		1045
		1046	void
		1047	ev_unloop (EV_P_ int how)
		1048	{
		1049	loop_done = how;
581	}	1050	}
582		1051
583	/*****************************************************************************/	1052	/*****************************************************************************/
584		1053
585	static void	1054	inline void
586	wlist_add (WL *head, WL elem)	1055	wlist_add (WL *head, WL elem)
587	{	1056	{
588	elem->next = *head;	1057	elem->next = *head;
589	*head = elem;	1058	*head = elem;
590	}	1059	}
591		1060
592	static void	1061	inline void
593	wlist_del (WL *head, WL elem)	1062	wlist_del (WL *head, WL elem)
594	{	1063	{
595	while (*head)	1064	while (*head)
596	{	1065	{
597	if (*head == elem)	1066	if (*head == elem)
…		…
602		1071
603	head = &(*head)->next;	1072	head = &(*head)->next;
604	}	1073	}
605	}	1074	}
606		1075
607	static void	1076	inline void
608	ev_clear (W w)	1077	ev_clear_pending (EV_P_ W w)
609	{	1078	{
610	if (w->pending)	1079	if (w->pending)
611	{	1080	{
612	pendings [w->pending - 1].w = 0;	1081	pendings [ABSPRI (w)][w->pending - 1].w = 0;
613	w->pending = 0;	1082	w->pending = 0;
614	}	1083	}
615	}	1084	}
616		1085
617	static void	1086	inline void
618	ev_start (W w, int active)	1087	ev_start (EV_P_ W w, int active)
619	{	1088	{
		1089	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1090	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1091
620	w->active = active;	1092	w->active = active;
		1093	ev_ref (EV_A);
621	}	1094	}
622		1095
623	static void	1096	inline void
624	ev_stop (W w)	1097	ev_stop (EV_P_ W w)
625	{	1098	{
		1099	ev_unref (EV_A);
626	w->active = 0;	1100	w->active = 0;
627	}	1101	}
628		1102
629	/*****************************************************************************/	1103	/*****************************************************************************/
630		1104
631	void	1105	void
632	evio_start (struct ev_io *w)	1106	ev_io_start (EV_P_ struct ev_io *w)
633	{	1107	{
		1108	int fd = w->fd;
		1109
634	if (ev_is_active (w))	1110	if (ev_is_active (w))
635	return;	1111	return;
636		1112
637	int fd = w->fd;	1113	assert (("ev_io_start called with negative fd", fd >= 0));
638		1114
639	ev_start ((W)w, 1);	1115	ev_start (EV_A_ (W)w, 1);
640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1116	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
641	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1117	wlist_add ((WL *)&anfds[fd].head, (WL)w);
642		1118
643	++fdchangecnt;	1119	fd_change (EV_A_ fd);
644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
645	fdchanges [fdchangecnt - 1] = fd;
646	}	1120	}
647		1121
648	void	1122	void
649	evio_stop (struct ev_io *w)	1123	ev_io_stop (EV_P_ struct ev_io *w)
650	{	1124	{
651	ev_clear ((W)w);	1125	ev_clear_pending (EV_A_ (W)w);
652	if (!ev_is_active (w))	1126	if (!ev_is_active (w))
653	return;	1127	return;
654		1128
655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1129	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
656	ev_stop ((W)w);	1130	ev_stop (EV_A_ (W)w);
657		1131
658	++fdchangecnt;	1132	fd_change (EV_A_ w->fd);
659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
660	fdchanges [fdchangecnt - 1] = w->fd;
661	}	1133	}
662		1134
663	void	1135	void
664	evtimer_start (struct ev_timer *w)	1136	ev_timer_start (EV_P_ struct ev_timer *w)
665	{	1137	{
666	if (ev_is_active (w))	1138	if (ev_is_active (w))
667	return;	1139	return;
668		1140
669	w->at += now;	1141	((WT)w)->at += mn_now;
670		1142
671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1143	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
672		1144
673	ev_start ((W)w, ++timercnt);	1145	ev_start (EV_A_ (W)w, ++timercnt);
674	array_needsize (timers, timermax, timercnt, );	1146	array_needsize (timers, timermax, timercnt, );
675	timers [timercnt - 1] = w;	1147	timers [timercnt - 1] = w;
676	upheap ((WT *)timers, timercnt - 1);	1148	upheap ((WT *)timers, timercnt - 1);
677	}
678		1149
		1150	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1151	}
		1152
679	void	1153	void
680	evtimer_stop (struct ev_timer *w)	1154	ev_timer_stop (EV_P_ struct ev_timer *w)
681	{	1155	{
682	ev_clear ((W)w);	1156	ev_clear_pending (EV_A_ (W)w);
683	if (!ev_is_active (w))	1157	if (!ev_is_active (w))
684	return;	1158	return;
685		1159
		1160	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1161
686	if (w->active < timercnt--)	1162	if (((W)w)->active < timercnt--)
687	{	1163	{
688	timers [w->active - 1] = timers [timercnt];	1164	timers [((W)w)->active - 1] = timers [timercnt];
689	downheap ((WT *)timers, timercnt, w->active - 1);	1165	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
690	}	1166	}
691		1167
692	w->at = w->repeat;	1168	((WT)w)->at = w->repeat;
693		1169
694	ev_stop ((W)w);	1170	ev_stop (EV_A_ (W)w);
695	}	1171	}
696		1172
697	void	1173	void
698	evtimer_again (struct ev_timer *w)	1174	ev_timer_again (EV_P_ struct ev_timer *w)
699	{	1175	{
700	if (ev_is_active (w))	1176	if (ev_is_active (w))
701	{	1177	{
702	if (w->repeat)	1178	if (w->repeat)
703	{	1179	{
704	w->at = now + w->repeat;	1180	((WT)w)->at = mn_now + w->repeat;
705	downheap ((WT *)timers, timercnt, w->active - 1);	1181	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
706	}	1182	}
707	else	1183	else
708	evtimer_stop (w);	1184	ev_timer_stop (EV_A_ w);
709	}	1185	}
710	else if (w->repeat)	1186	else if (w->repeat)
711	evtimer_start (w);	1187	ev_timer_start (EV_A_ w);
712	}	1188	}
713		1189
714	void	1190	void
715	evperiodic_start (struct ev_periodic *w)	1191	ev_periodic_start (EV_P_ struct ev_periodic *w)
716	{	1192	{
717	if (ev_is_active (w))	1193	if (ev_is_active (w))
718	return;	1194	return;
719		1195
720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1196	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
721		1197
722	/* this formula differs from the one in periodic_reify because we do not always round up */	1198	/* this formula differs from the one in periodic_reify because we do not always round up */
723	if (w->interval)	1199	if (w->interval)
724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1200	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
725		1201
726	ev_start ((W)w, ++periodiccnt);	1202	ev_start (EV_A_ (W)w, ++periodiccnt);
727	array_needsize (periodics, periodicmax, periodiccnt, );	1203	array_needsize (periodics, periodicmax, periodiccnt, );
728	periodics [periodiccnt - 1] = w;	1204	periodics [periodiccnt - 1] = w;
729	upheap ((WT *)periodics, periodiccnt - 1);	1205	upheap ((WT *)periodics, periodiccnt - 1);
730	}
731		1206
		1207	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1208	}
		1209
732	void	1210	void
733	evperiodic_stop (struct ev_periodic *w)	1211	ev_periodic_stop (EV_P_ struct ev_periodic *w)
734	{	1212	{
735	ev_clear ((W)w);	1213	ev_clear_pending (EV_A_ (W)w);
736	if (!ev_is_active (w))	1214	if (!ev_is_active (w))
737	return;	1215	return;
738		1216
		1217	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1218
739	if (w->active < periodiccnt--)	1219	if (((W)w)->active < periodiccnt--)
740	{	1220	{
741	periodics [w->active - 1] = periodics [periodiccnt];	1221	periodics [((W)w)->active - 1] = periodics [periodiccnt];
742	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1222	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
743	}	1223	}
744		1224
745	ev_stop ((W)w);	1225	ev_stop (EV_A_ (W)w);
746	}	1226	}
747		1227
748	void	1228	void
749	evsignal_start (struct ev_signal *w)	1229	ev_idle_start (EV_P_ struct ev_idle *w)
750	{	1230	{
751	if (ev_is_active (w))	1231	if (ev_is_active (w))
752	return;	1232	return;
753		1233
		1234	ev_start (EV_A_ (W)w, ++idlecnt);
		1235	array_needsize (idles, idlemax, idlecnt, );
		1236	idles [idlecnt - 1] = w;
		1237	}
		1238
		1239	void
		1240	ev_idle_stop (EV_P_ struct ev_idle *w)
		1241	{
		1242	ev_clear_pending (EV_A_ (W)w);
		1243	if (ev_is_active (w))
		1244	return;
		1245
		1246	idles [((W)w)->active - 1] = idles [--idlecnt];
		1247	ev_stop (EV_A_ (W)w);
		1248	}
		1249
		1250	void
		1251	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1252	{
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	ev_start (EV_A_ (W)w, ++preparecnt);
		1257	array_needsize (prepares, preparemax, preparecnt, );
		1258	prepares [preparecnt - 1] = w;
		1259	}
		1260
		1261	void
		1262	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1263	{
		1264	ev_clear_pending (EV_A_ (W)w);
		1265	if (ev_is_active (w))
		1266	return;
		1267
		1268	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1269	ev_stop (EV_A_ (W)w);
		1270	}
		1271
		1272	void
		1273	ev_check_start (EV_P_ struct ev_check *w)
		1274	{
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	ev_start (EV_A_ (W)w, ++checkcnt);
		1279	array_needsize (checks, checkmax, checkcnt, );
		1280	checks [checkcnt - 1] = w;
		1281	}
		1282
		1283	void
		1284	ev_check_stop (EV_P_ struct ev_check *w)
		1285	{
		1286	ev_clear_pending (EV_A_ (W)w);
		1287	if (ev_is_active (w))
		1288	return;
		1289
		1290	checks [((W)w)->active - 1] = checks [--checkcnt];
		1291	ev_stop (EV_A_ (W)w);
		1292	}
		1293
		1294	#ifndef SA_RESTART
		1295	# define SA_RESTART 0
		1296	#endif
		1297
		1298	void
		1299	ev_signal_start (EV_P_ struct ev_signal *w)
		1300	{
		1301	#if EV_MULTIPLICITY
		1302	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1303	#endif
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1308
754	ev_start ((W)w, 1);	1309	ev_start (EV_A_ (W)w, 1);
755	array_needsize (signals, signalmax, w->signum, signals_init);	1310	array_needsize (signals, signalmax, w->signum, signals_init);
756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1311	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
757		1312
758	if (!w->next)	1313	if (!((WL)w)->next)
759	{	1314	{
760	struct sigaction sa;	1315	struct sigaction sa;
761	sa.sa_handler = sighandler;	1316	sa.sa_handler = sighandler;
762	sigfillset (&sa.sa_mask);	1317	sigfillset (&sa.sa_mask);
763	sa.sa_flags = 0;	1318	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
764	sigaction (w->signum, &sa, 0);	1319	sigaction (w->signum, &sa, 0);
765	}	1320	}
766	}	1321	}
767		1322
768	void	1323	void
769	evsignal_stop (struct ev_signal *w)	1324	ev_signal_stop (EV_P_ struct ev_signal *w)
770	{	1325	{
771	ev_clear ((W)w);	1326	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1327	if (!ev_is_active (w))
773	return;	1328	return;
774		1329
775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1330	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
776	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
777		1332
778	if (!signals [w->signum - 1].head)	1333	if (!signals [w->signum - 1].head)
779	signal (w->signum, SIG_DFL);	1334	signal (w->signum, SIG_DFL);
780	}	1335	}
781		1336
782	void evidle_start (struct ev_idle *w)	1337	void
		1338	ev_child_start (EV_P_ struct ev_child *w)
783	{	1339	{
		1340	#if EV_MULTIPLICITY
		1341	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1342	#endif
784	if (ev_is_active (w))	1343	if (ev_is_active (w))
785	return;	1344	return;
786		1345
787	ev_start ((W)w, ++idlecnt);	1346	ev_start (EV_A_ (W)w, 1);
788	array_needsize (idles, idlemax, idlecnt, );	1347	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
789	idles [idlecnt - 1] = w;
790	}	1348	}
791		1349
792	void evidle_stop (struct ev_idle *w)	1350	void
		1351	ev_child_stop (EV_P_ struct ev_child *w)
793	{	1352	{
794	ev_clear ((W)w);	1353	ev_clear_pending (EV_A_ (W)w);
795	if (ev_is_active (w))	1354	if (ev_is_active (w))
796	return;	1355	return;
797		1356
798	idles [w->active - 1] = idles [--idlecnt];	1357	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
799	ev_stop ((W)w);	1358	ev_stop (EV_A_ (W)w);
800	}
801
802	void evcheck_start (struct ev_check *w)
803	{
804	if (ev_is_active (w))
805	return;
806
807	ev_start ((W)w, ++checkcnt);
808	array_needsize (checks, checkmax, checkcnt, );
809	checks [checkcnt - 1] = w;
810	}
811
812	void evcheck_stop (struct ev_check *w)
813	{
814	ev_clear ((W)w);
815	if (ev_is_active (w))
816	return;
817
818	checks [w->active - 1] = checks [--checkcnt];
819	ev_stop ((W)w);
820	}	1359	}
821		1360
822	/*****************************************************************************/	1361	/*****************************************************************************/
823		1362
824	struct ev_once	1363	struct ev_once
…		…
828	void (cb)(int revents, void arg);	1367	void (cb)(int revents, void arg);
829	void *arg;	1368	void *arg;
830	};	1369	};
831		1370
832	static void	1371	static void
833	once_cb (struct ev_once *once, int revents)	1372	once_cb (EV_P_ struct ev_once *once, int revents)
834	{	1373	{
835	void (cb)(int revents, void arg) = once->cb;	1374	void (cb)(int revents, void arg) = once->cb;
836	void *arg = once->arg;	1375	void *arg = once->arg;
837		1376
838	evio_stop (&once->io);	1377	ev_io_stop (EV_A_ &once->io);
839	evtimer_stop (&once->to);	1378	ev_timer_stop (EV_A_ &once->to);
840	free (once);	1379	free (once);
841		1380
842	cb (revents, arg);	1381	cb (revents, arg);
843	}	1382	}
844		1383
845	static void	1384	static void
846	once_cb_io (struct ev_io *w, int revents)	1385	once_cb_io (EV_P_ struct ev_io *w, int revents)
847	{	1386	{
848	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1387	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
849	}	1388	}
850		1389
851	static void	1390	static void
852	once_cb_to (struct ev_timer *w, int revents)	1391	once_cb_to (EV_P_ struct ev_timer *w, int revents)
853	{	1392	{
854	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1393	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
855	}	1394	}
856		1395
857	void	1396	void
858	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1397	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
859	{	1398	{
860	struct ev_once *once = malloc (sizeof (struct ev_once));	1399	struct ev_once *once = malloc (sizeof (struct ev_once));
861		1400
862	if (!once)	1401	if (!once)
863	cb (EV_ERROR, arg);	1402	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
864	else	1403	else
865	{	1404	{
866	once->cb = cb;	1405	once->cb = cb;
867	once->arg = arg;	1406	once->arg = arg;
868		1407
869	evw_init (&once->io, once_cb_io);	1408	ev_watcher_init (&once->io, once_cb_io);
870
871	if (fd >= 0)	1409	if (fd >= 0)
872	{	1410	{
873	evio_set (&once->io, fd, events);	1411	ev_io_set (&once->io, fd, events);
874	evio_start (&once->io);	1412	ev_io_start (EV_A_ &once->io);
875	}	1413	}
876		1414
877	evw_init (&once->to, once_cb_to);	1415	ev_watcher_init (&once->to, once_cb_to);
878
879	if (timeout >= 0.)	1416	if (timeout >= 0.)
880	{	1417	{
881	evtimer_set (&once->to, timeout, 0.);	1418	ev_timer_set (&once->to, timeout, 0.);
882	evtimer_start (&once->to);	1419	ev_timer_start (EV_A_ &once->to);
883	}	1420	}
884	}	1421	}
885	}	1422	}
886		1423
887	/*****************************************************************************/
888
889	#if 0
890
891	struct ev_io wio;
892
893	static void
894	sin_cb (struct ev_io *w, int revents)
895	{
896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
897	}
898
899	static void
900	ocb (struct ev_timer *w, int revents)
901	{
902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
903	evtimer_stop (w);
904	evtimer_start (w);
905	}
906
907	static void
908	scb (struct ev_signal *w, int revents)
909	{
910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
911	evio_stop (&wio);
912	evio_start (&wio);
913	}
914
915	static void
916	gcb (struct ev_signal *w, int revents)
917	{
918	fprintf (stderr, "generic %x\n", revents);
919
920	}
921
922	int main (void)
923	{
924	ev_init (0);
925
926	evio_init (&wio, sin_cb, 0, EV_READ);
927	evio_start (&wio);
928
929	struct ev_timer t[10000];
930
931	#if 0
932	int i;
933	for (i = 0; i < 10000; ++i)
934	{
935	struct ev_timer *w = t + i;
936	evw_init (w, ocb, i);
937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
938	evtimer_start (w);
939	if (drand48 () < 0.5)
940	evtimer_stop (w);
941	}
942	#endif
943
944	struct ev_timer t1;
945	evtimer_init (&t1, ocb, 5, 10);
946	evtimer_start (&t1);
947
948	struct ev_signal sig;
949	evsignal_init (&sig, scb, SIGQUIT);
950	evsignal_start (&sig);
951
952	struct ev_check cw;
953	evcheck_init (&cw, gcb);
954	evcheck_start (&cw);
955
956	struct ev_idle iw;
957	evidle_init (&iw, gcb);
958	evidle_start (&iw);
959
960	ev_loop (0);
961
962	return 0;
963	}
964
965	#endif
966
967
968
969

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Comparing libev/ev.c (file contents): Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs. Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC