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

Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	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
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>	59	#include <unistd.h>
…		…
40	#include <stdio.h>	64	#include <stdio.h>
41		65
42	#include <assert.h>	66	#include <assert.h>
43	#include <errno.h>	67	#include <errno.h>
44	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
45	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
46	#include <sys/time.h>	72	#include <sys/time.h>
47	#include <time.h>	73	#include <time.h>
48		74
		75	/**/
		76
49	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	79	#endif
54		80
55	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
57	#endif	83	#endif
58		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
59	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
61	#endif	91	#endif
62		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
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
63	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
65	#endif	119	#endif
66	#ifndef EV_USE_REALTIME	120
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
68	#endif
69		122
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
74		127
75	#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)
76		143
77	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
80		147
81	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84
85	static int have_monotonic; /* runtime */
86
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		149
91	/*****************************************************************************/	150	/*****************************************************************************/
92		151
93	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
94	ev_time (void)	186	ev_time (void)
95	{	187	{
96	#if EV_USE_REALTIME	188	#if EV_USE_REALTIME
97	struct timespec ts;	189	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	196	#endif
105	}	197	}
106		198
107	static ev_tstamp	199	inline ev_tstamp
108	get_clock (void)	200	get_clock (void)
109	{	201	{
110	#if EV_USE_MONOTONIC	202	#if EV_USE_MONOTONIC
111	if (have_monotonic)	203	if (expect_true (have_monotonic))
112	{	204	{
113	struct timespec ts;	205	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	208	}
117	#endif	209	#endif
118		210
119	return ev_time ();	211	return ev_time ();
120	}	212	}
121		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
123		221
124	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
126	{ \	224	{ \
127	int newcnt = cur; \	225	int newcnt = cur; \
128	do \	226	do \
129	{ \	227	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	228	newcnt = array_roundsize (base, newcnt << 1); \
…		…
134	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
135	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	234	cur = newcnt; \
137	}	235	}
138		236
		237	#define array_free(stem, idx) \
		238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		239
139	/*****************************************************************************/	240	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149		241
150	static void	242	static void
151	anfds_init (ANFD *base, int count)	243	anfds_init (ANFD *base, int count)
152	{	244	{
153	while (count--)	245	while (count--)
154	{	246	{
155	base->head = 0;	247	base->head = 0;
156	base->events = EV_NONE;	248	base->events = EV_NONE;
		249	base->reify = 0;
		250
157	++base;	251	++base;
158	}	252	}
159	}	253	}
160		254
161	typedef struct
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void	255	static void
171	event (W w, int events)	256	event (EV_P_ W w, int events)
172	{	257	{
		258	if (w->pending)
		259	{
		260	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		261	return;
		262	}
		263
173	w->pending = ++pendingcnt;	264	w->pending = ++pendingcnt [ABSPRI (w)];
174	array_needsize (pendings, pendingmax, pendingcnt, );	265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
175	pendings [pendingcnt - 1].w = w;	266	pendings [ABSPRI (w)][w->pending - 1].w = w;
176	pendings [pendingcnt - 1].events = events;	267	pendings [ABSPRI (w)][w->pending - 1].events = events;
177	}	268	}
178		269
179	static void	270	static void
180	queue_events (W *events, int eventcnt, int type)	271	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	272	{
182	int i;	273	int i;
183		274
184	for (i = 0; i < eventcnt; ++i)	275	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	276	event (EV_A_ events [i], type);
186	}	277	}
187		278
188	static void	279	static void
189	fd_event (int fd, int events)	280	fd_event (EV_P_ int fd, int events)
190	{	281	{
191	ANFD *anfd = anfds + fd;	282	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	283	struct ev_io *w;
193		284
194	for (w = anfd->head; w; w = w->next)	285	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
195	{	286	{
196	int ev = w->events & events;	287	int ev = w->events & events;
197		288
198	if (ev)	289	if (ev)
199	event ((W)w, ev);	290	event (EV_A_ (W)w, ev);
200	}	291	}
201	}	292	}
202		293
203	/*****************************************************************************/	294	/*****************************************************************************/
204		295
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	296	static void
209	fd_reify (void)	297	fd_reify (EV_P)
210	{	298	{
211	int i;	299	int i;
212		300
213	for (i = 0; i < fdchangecnt; ++i)	301	for (i = 0; i < fdchangecnt; ++i)
214	{	302	{
…		…
216	ANFD *anfd = anfds + fd;	304	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	305	struct ev_io *w;
218		306
219	int events = 0;	307	int events = 0;
220		308
221	for (w = anfd->head; w; w = w->next)	309	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
222	events \|= w->events;	310	events \|= w->events;
223		311
224	anfd->events &= ~EV_REIFY;	312	anfd->reify = 0;
225		313
226	if (anfd->events != events)
227	{
228	method_modify (fd, anfd->events, events);	314	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	315	anfd->events = events;
230	}
231	}	316	}
232		317
233	fdchangecnt = 0;	318	fdchangecnt = 0;
234	}	319	}
235		320
236	static void	321	static void
237	fd_change (int fd)	322	fd_change (EV_P_ int fd)
238	{	323	{
239	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	324	if (anfds [fd].reify \|\| fdchangecnt < 0)
240	return;	325	return;
241		326
242	anfds [fd].events \|= EV_REIFY;	327	anfds [fd].reify = 1;
243		328
244	++fdchangecnt;	329	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
246	fdchanges [fdchangecnt - 1] = fd;	331	fdchanges [fdchangecnt - 1] = fd;
247	}	332	}
248		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
249	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
250	static void	347	static void
251	fd_recheck (void)	348	fd_ebadf (EV_P)
252	{	349	{
253	int fd;	350	int fd;
254		351
255	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	353	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
258	while (anfds [fd].head)	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)
259	{	366	{
260	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	367	close (fd);
261	ev_io_stop (anfds [fd].head);	368	fd_kill (EV_A_ fd);
		369	return;
262	}	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	}
263	}	386	}
264		387
265	/*****************************************************************************/	388	/*****************************************************************************/
266		389
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	390	static void
274	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
275	{	392	{
276	WT w = timers [k];	393	WT w = heap [k];
277		394
278	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
279	{	396	{
280	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
282	k >>= 1;	399	k >>= 1;
283	}	400	}
284		401
285	timers [k] = w;	402	heap [k] = w;
286	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
287		404
288	}	405	}
289		406
290	static void	407	static void
291	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
292	{	409	{
293	WT w = timers [k];	410	WT w = heap [k];
294		411
295	while (k < (N >> 1))	412	while (k < (N >> 1))
296	{	413	{
297	int j = k << 1;	414	int j = k << 1;
298		415
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	417	++j;
301		418
302	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
303	break;	420	break;
304		421
305	timers [k] = timers [j];	422	heap [k] = heap [j];
306	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
307	k = j;	424	k = j;
308	}	425	}
309		426
310	timers [k] = w;	427	heap [k] = w;
311	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
312	}	429	}
313		430
314	/*****************************************************************************/	431	/*****************************************************************************/
315		432
316	typedef struct	433	typedef struct
317	{	434	{
318	struct ev_signal *head;	435	struct ev_watcher_list *head;
319	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
320	} ANSIG;	437	} ANSIG;
321		438
322	static ANSIG *signals;	439	static ANSIG *signals;
323	static int signalmax;	440	static int signalmax;
324		441
325	static int sigpipe [2];	442	static int sigpipe [2];
326	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	444	static struct ev_io sigev;
328		445
329	static void	446	static void
330	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
331	{	448	{
332	while (count--)	449	while (count--)
333	{	450	{
334	base->head = 0;	451	base->head = 0;
335	base->gotsig = 0;	452	base->gotsig = 0;
		453
336	++base;	454	++base;
337	}	455	}
338	}	456	}
339		457
340	static void	458	static void
…		…
342	{	460	{
343	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
344		462
345	if (!gotsig)	463	if (!gotsig)
346	{	464	{
		465	int old_errno = errno;
347	gotsig = 1;	466	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
349	}	469	}
350	}	470	}
351		471
352	static void	472	static void
353	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	474	{
355	struct ev_signal *w;	475	struct ev_watcher_list *w;
356	int sig;	476	int signum;
357		477
		478	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	479	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		480
361	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
363	{	483	{
364	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
365		485
366	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
368	}	488	}
369	}	489	}
370		490
371	static void	491	static void
372	siginit (void)	492	siginit (EV_P)
373	{	493	{
		494	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		497
377	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
380		502
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	506	}
384		507
385	/*****************************************************************************/	508	/*****************************************************************************/
386		509
387	static struct ev_idle **idles;	510	#ifndef WIN32
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397		511
398	static struct ev_child *childs [PID_HASHSIZE];	512	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;	513	static struct ev_signal childev;
400		514
401	#ifndef WCONTINUED	515	#ifndef WCONTINUED
402	# define WCONTINUED 0	516	# define WCONTINUED 0
403	#endif	517	#endif
404		518
405	static void	519	static void
406	childcb (struct ev_signal *sw, int revents)	520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	521	{
408	struct ev_child *w;	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	{
409	int pid, status;	537	int pid, status;
410		538
411	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	539	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	540	{
413	if (w->pid == pid \|\| w->pid == -1)	541	/* make sure we are called again until all childs have been reaped */
414	{	542	event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	543
416	event ((W)w, EV_CHILD);	544	child_reap (EV_A_ sw, pid, pid, status);
417	}	545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
418	}	547	}
		548
		549	#endif
419		550
420	/*****************************************************************************/	551	/*****************************************************************************/
421		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
422	#if EV_USE_EPOLL	556	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	557	# include "ev_epoll.c"
424	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
425	#if EV_USE_SELECT	562	#if EV_USE_SELECT
426	# include "ev_select.c"	563	# include "ev_select.c"
427	#endif	564	#endif
428		565
429	int	566	int
…		…
436	ev_version_minor (void)	573	ev_version_minor (void)
437	{	574	{
438	return EV_VERSION_MINOR;	575	return EV_VERSION_MINOR;
439	}	576	}
440		577
441	int ev_init (int flags)	578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
442	{	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	{
443	if (!ev_method)	599	if (!method)
444	{	600	{
445	#if EV_USE_MONOTONIC	601	#if EV_USE_MONOTONIC
446	{	602	{
447	struct timespec ts;	603	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	605	have_monotonic = 1;
450	}	606	}
451	#endif	607	#endif
452		608
453	ev_now = ev_time ();	609	rt_now = ev_time ();
454	now = get_clock ();	610	mn_now = get_clock ();
		611	now_floor = mn_now;
455	diff = ev_now - now;	612	rtmn_diff = rt_now - mn_now;
456		613
457	if (pipe (sigpipe))	614	if (methods == EVMETHOD_AUTO)
458	return 0;	615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
460	ev_method = EVMETHOD_NONE;	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
461	#if EV_USE_EPOLL	627	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	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);
463	#endif	632	#endif
464	#if EV_USE_SELECT	633	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	635	#endif
		636	}
		637	}
467		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])
		728	if (pipe (sigpipe))
		729	return 0;
		730
		731	if (!default_loop)
		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
468	if (ev_method)	741	if (ev_method (EV_A))
469	{	742	{
470	ev_watcher_init (&sigev, sigcb);	743	ev_watcher_init (&sigev, sigcb);
		744	ev_set_priority (&sigev, EV_MAXPRI);
471	siginit ();	745	siginit (EV_A);
472		746
		747	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	748	ev_signal_init (&childev, childcb, SIGCHLD);
		749	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	750	ev_signal_start (EV_A_ &childev);
		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
		752	#endif
475	}	753	}
		754	else
		755	default_loop = 0;
476	}	756	}
477		757
478	return ev_method;	758	return default_loop;
479	}	759	}
480		760
481	/*****************************************************************************/
482
483	void	761	void
484	ev_prefork (void)	762	ev_default_destroy (void)
485	{	763	{
486	/* nop */	764	#if EV_MULTIPLICITY
487	}	765	struct ev_loop *loop = default_loop;
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif	766	#endif
502		767
		768	ev_ref (EV_A); /* child watcher */
		769	ev_signal_stop (EV_A_ &childev);
		770
		771	ev_ref (EV_A); /* signal watcher */
503	ev_io_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);
504	close (sigpipe [0]);	790	close (sigpipe [0]);
505	close (sigpipe [1]);	791	close (sigpipe [1]);
506	pipe (sigpipe);	792	pipe (sigpipe);
		793
		794	ev_ref (EV_A); /* signal watcher */
507	siginit ();	795	siginit (EV_A);
508	}	796	}
509		797
510	/*****************************************************************************/	798	/*****************************************************************************/
511		799
512	static void	800	static void
513	call_pending (void)	801	call_pending (EV_P)
514	{	802	{
		803	int pri;
		804
		805	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	806	while (pendingcnt [pri])
516	{	807	{
517	ANPENDING *p = pendings + --pendingcnt;	808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		809
519	if (p->w)	810	if (p->w)
520	{	811	{
521	p->w->pending = 0;	812	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	813	p->w->cb (EV_A_ p->w, p->events);
523	}	814	}
524	}	815	}
525	}	816	}
526		817
527	static void	818	static void
528	timers_reify (void)	819	timers_reify (EV_P)
529	{	820	{
530	while (timercnt && timers [0]->at <= now)	821	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	822	{
532	struct ev_timer *w = timers [0];	823	struct ev_timer *w = timers [0];
		824
		825	assert (("inactive timer on timer heap detected", ev_is_active (w)));
533		826
534	/* first reschedule or stop timer */	827	/* first reschedule or stop timer */
535	if (w->repeat)	828	if (w->repeat)
536	{	829	{
		830	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
537	w->at = now + w->repeat;	831	((WT)w)->at = mn_now + w->repeat;
538	assert (("timer timeout in the past, negative repeat?", w->at > now));
539	downheap ((WT *)timers, timercnt, 0);	832	downheap ((WT *)timers, timercnt, 0);
540	}	833	}
541	else	834	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	835	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		836
544	event ((W)w, EV_TIMEOUT);	837	event (EV_A_ (W)w, EV_TIMEOUT);
545	}	838	}
546	}	839	}
547		840
548	static void	841	static void
549	periodics_reify (void)	842	periodics_reify (EV_P)
550	{	843	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	844	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
552	{	845	{
553	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)));
554		849
555	/* first reschedule or stop timer */	850	/* first reschedule or stop timer */
556	if (w->interval)	851	if (w->interval)
557	{	852	{
558	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;
559	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));
560	downheap ((WT *)periodics, periodiccnt, 0);	855	downheap ((WT *)periodics, periodiccnt, 0);
561	}	856	}
562	else	857	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	858	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		859
565	event ((W)w, EV_TIMEOUT);	860	event (EV_A_ (W)w, EV_PERIODIC);
566	}	861	}
567	}	862	}
568		863
569	static void	864	static void
570	periodics_reschedule (ev_tstamp diff)	865	periodics_reschedule (EV_P)
571	{	866	{
572	int i;	867	int i;
573		868
574	/* adjust periodics after time jump */	869	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	870	for (i = 0; i < periodiccnt; ++i)
576	{	871	{
577	struct ev_periodic *w = periodics [i];	872	struct ev_periodic *w = periodics [i];
578		873
579	if (w->interval)	874	if (w->interval)
580	{	875	{
581	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;
582		877
583	if (fabs (diff) >= 1e-4)	878	if (fabs (diff) >= 1e-4)
584	{	879	{
585	ev_periodic_stop (w);	880	ev_periodic_stop (EV_A_ w);
586	ev_periodic_start (w);	881	ev_periodic_start (EV_A_ w);
587		882
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	883	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	884	}
590	}	885	}
591	}	886	}
592	}	887	}
593		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
594	static void	907	static void
595	time_update (void)	908	time_update (EV_P)
596	{	909	{
597	int i;	910	int i;
598		911
599	ev_now = ev_time ();	912	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	913	if (expect_true (have_monotonic))
602	{	914	{
603	ev_tstamp odiff = diff;	915	if (time_update_monotonic (EV_A))
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	916	{
607	now = get_clock ();	917	ev_tstamp odiff = rtmn_diff;
		918
		919	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		920	{
608	diff = ev_now - now;	921	rtmn_diff = rt_now - mn_now;
609		922
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	923	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	924	return; /* all is well */
612		925
613	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) */
614	}	934	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}	935	}
619	else	936	else
		937	#endif
620	{	938	{
621	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))
622	{	942	{
623	periodics_reschedule (ev_now - now);	943	periodics_reschedule (EV_A);
624		944
625	/* 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 */
626	for (i = 0; i < timercnt; ++i)	946	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	947	((WT)timers [i])->at += rt_now - mn_now;
628	}	948	}
629		949
630	now = ev_now;	950	mn_now = rt_now;
631	}	951	}
632	}	952	}
633		953
634	int ev_loop_done;	954	void
		955	ev_ref (EV_P)
		956	{
		957	++activecnt;
		958	}
635		959
		960	void
		961	ev_unref (EV_P)
		962	{
		963	--activecnt;
		964	}
		965
		966	static int loop_done;
		967
		968	void
636	void ev_loop (int flags)	969	ev_loop (EV_P_ int flags)
637	{	970	{
638	double block;	971	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	972	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
640		973
641	do	974	do
642	{	975	{
643	/* queue check watchers (and execute them) */	976	/* queue check watchers (and execute them) */
644	if (preparecnt)	977	if (expect_false (preparecnt))
645	{	978	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	979	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	980	call_pending (EV_A);
648	}	981	}
649		982
650	/* update fd-related kernel structures */	983	/* update fd-related kernel structures */
651	fd_reify ();	984	fd_reify (EV_A);
652		985
653	/* calculate blocking time */	986	/* calculate blocking time */
654		987
655	/* we only need this for !monotonic clockor timers, but as we basically	988	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */	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	{
657	ev_now = ev_time ();	996	rt_now = ev_time ();
		997	mn_now = rt_now;
		998	}
658		999
659	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1000	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
660	block = 0.;	1001	block = 0.;
661	else	1002	else
662	{	1003	{
663	block = MAX_BLOCKTIME;	1004	block = MAX_BLOCKTIME;
664		1005
665	if (timercnt)	1006	if (timercnt)
666	{	1007	{
667	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;
668	if (block > to) block = to;	1009	if (block > to) block = to;
669	}	1010	}
670		1011
671	if (periodiccnt)	1012	if (periodiccnt)
672	{	1013	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1014	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
674	if (block > to) block = to;	1015	if (block > to) block = to;
675	}	1016	}
676		1017
677	if (block < 0.) block = 0.;	1018	if (block < 0.) block = 0.;
678	}	1019	}
679		1020
680	method_poll (block);	1021	method_poll (EV_A_ block);
681		1022
682	/* update ev_now, do magic */	1023	/* update rt_now, do magic */
683	time_update ();	1024	time_update (EV_A);
684		1025
685	/* queue pending timers and reschedule them */	1026	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1027	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	1028	periodics_reify (EV_A); /* absolute timers called first */
688		1029
689	/* queue idle watchers unless io or timers are pending */	1030	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	1031	if (!pendingcnt)
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1032	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1033
693	/* queue check watchers, to be executed first */	1034	/* queue check watchers, to be executed first */
694	if (checkcnt)	1035	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1036	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1037
697	call_pending ();	1038	call_pending (EV_A);
698	}	1039	}
699	while (!ev_loop_done);	1040	while (activecnt && !loop_done);
700		1041
701	if (ev_loop_done != 2)	1042	if (loop_done != 2)
702	ev_loop_done = 0;	1043	loop_done = 0;
		1044	}
		1045
		1046	void
		1047	ev_unloop (EV_P_ int how)
		1048	{
		1049	loop_done = how;
703	}	1050	}
704		1051
705	/*****************************************************************************/	1052	/*****************************************************************************/
706		1053
707	static void	1054	inline void
708	wlist_add (WL *head, WL elem)	1055	wlist_add (WL *head, WL elem)
709	{	1056	{
710	elem->next = *head;	1057	elem->next = *head;
711	*head = elem;	1058	*head = elem;
712	}	1059	}
713		1060
714	static void	1061	inline void
715	wlist_del (WL *head, WL elem)	1062	wlist_del (WL *head, WL elem)
716	{	1063	{
717	while (*head)	1064	while (*head)
718	{	1065	{
719	if (*head == elem)	1066	if (*head == elem)
…		…
724		1071
725	head = &(*head)->next;	1072	head = &(*head)->next;
726	}	1073	}
727	}	1074	}
728		1075
729	static void	1076	inline void
730	ev_clear (W w)	1077	ev_clear_pending (EV_P_ W w)
731	{	1078	{
732	if (w->pending)	1079	if (w->pending)
733	{	1080	{
734	pendings [w->pending - 1].w = 0;	1081	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1082	w->pending = 0;
736	}	1083	}
737	}	1084	}
738		1085
739	static void	1086	inline void
740	ev_start (W w, int active)	1087	ev_start (EV_P_ W w, int active)
741	{	1088	{
		1089	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1090	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1091
742	w->active = active;	1092	w->active = active;
		1093	ev_ref (EV_A);
743	}	1094	}
744		1095
745	static void	1096	inline void
746	ev_stop (W w)	1097	ev_stop (EV_P_ W w)
747	{	1098	{
		1099	ev_unref (EV_A);
748	w->active = 0;	1100	w->active = 0;
749	}	1101	}
750		1102
751	/*****************************************************************************/	1103	/*****************************************************************************/
752		1104
753	void	1105	void
754	ev_io_start (struct ev_io *w)	1106	ev_io_start (EV_P_ struct ev_io *w)
755	{	1107	{
		1108	int fd = w->fd;
		1109
756	if (ev_is_active (w))	1110	if (ev_is_active (w))
757	return;	1111	return;
758		1112
759	int fd = w->fd;	1113	assert (("ev_io_start called with negative fd", fd >= 0));
760		1114
761	ev_start ((W)w, 1);	1115	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1116	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1117	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1118
765	fd_change (fd);	1119	fd_change (EV_A_ fd);
766	}	1120	}
767		1121
768	void	1122	void
769	ev_io_stop (struct ev_io *w)	1123	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1124	{
771	ev_clear ((W)w);	1125	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1126	if (!ev_is_active (w))
773	return;	1127	return;
774		1128
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1129	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1130	ev_stop (EV_A_ (W)w);
777		1131
778	fd_change (w->fd);	1132	fd_change (EV_A_ w->fd);
779	}	1133	}
780		1134
781	void	1135	void
782	ev_timer_start (struct ev_timer *w)	1136	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1137	{
784	if (ev_is_active (w))	1138	if (ev_is_active (w))
785	return;	1139	return;
786		1140
787	w->at += now;	1141	((WT)w)->at += mn_now;
788		1142
789	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.));
790		1144
791	ev_start ((W)w, ++timercnt);	1145	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1146	array_needsize (timers, timermax, timercnt, );
793	timers [timercnt - 1] = w;	1147	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1148	upheap ((WT *)timers, timercnt - 1);
795	}
796		1149
		1150	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1151	}
		1152
797	void	1153	void
798	ev_timer_stop (struct ev_timer *w)	1154	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1155	{
800	ev_clear ((W)w);	1156	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1157	if (!ev_is_active (w))
802	return;	1158	return;
803		1159
		1160	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1161
804	if (w->active < timercnt--)	1162	if (((W)w)->active < timercnt--)
805	{	1163	{
806	timers [w->active - 1] = timers [timercnt];	1164	timers [((W)w)->active - 1] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1165	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
808	}	1166	}
809		1167
810	w->at = w->repeat;	1168	((WT)w)->at = w->repeat;
811		1169
812	ev_stop ((W)w);	1170	ev_stop (EV_A_ (W)w);
813	}	1171	}
814		1172
815	void	1173	void
816	ev_timer_again (struct ev_timer *w)	1174	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1175	{
818	if (ev_is_active (w))	1176	if (ev_is_active (w))
819	{	1177	{
820	if (w->repeat)	1178	if (w->repeat)
821	{	1179	{
822	w->at = now + w->repeat;	1180	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1181	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
824	}	1182	}
825	else	1183	else
826	ev_timer_stop (w);	1184	ev_timer_stop (EV_A_ w);
827	}	1185	}
828	else if (w->repeat)	1186	else if (w->repeat)
829	ev_timer_start (w);	1187	ev_timer_start (EV_A_ w);
830	}	1188	}
831		1189
832	void	1190	void
833	ev_periodic_start (struct ev_periodic *w)	1191	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1192	{
835	if (ev_is_active (w))	1193	if (ev_is_active (w))
836	return;	1194	return;
837		1195
838	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.));
839		1197
840	/* 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 */
841	if (w->interval)	1199	if (w->interval)
842	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;
843		1201
844	ev_start ((W)w, ++periodiccnt);	1202	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1203	array_needsize (periodics, periodicmax, periodiccnt, );
846	periodics [periodiccnt - 1] = w;	1204	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1205	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1206
		1207	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1208	}
		1209
850	void	1210	void
851	ev_periodic_stop (struct ev_periodic *w)	1211	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1212	{
853	ev_clear ((W)w);	1213	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1214	if (!ev_is_active (w))
855	return;	1215	return;
856		1216
		1217	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1218
857	if (w->active < periodiccnt--)	1219	if (((W)w)->active < periodiccnt--)
858	{	1220	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1221	periodics [((W)w)->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1222	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
861	}	1223	}
862		1224
863	ev_stop ((W)w);	1225	ev_stop (EV_A_ (W)w);
864	}	1226	}
865		1227
866	void	1228	void
867	ev_signal_start (struct ev_signal *w)	1229	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1230	{
869	if (ev_is_active (w))	1231	if (ev_is_active (w))
870	return;	1232	return;
871		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
872	ev_start ((W)w, 1);	1309	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1310	array_needsize (signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1311	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1312
876	if (!w->next)	1313	if (!((WL)w)->next)
877	{	1314	{
878	struct sigaction sa;	1315	struct sigaction sa;
879	sa.sa_handler = sighandler;	1316	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1317	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1318	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1319	sigaction (w->signum, &sa, 0);
883	}	1320	}
884	}	1321	}
885		1322
886	void	1323	void
887	ev_signal_stop (struct ev_signal *w)	1324	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1325	{
889	ev_clear ((W)w);	1326	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1327	if (!ev_is_active (w))
891	return;	1328	return;
892		1329
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1330	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
895		1332
896	if (!signals [w->signum - 1].head)	1333	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1334	signal (w->signum, SIG_DFL);
898	}	1335	}
899		1336
900	void	1337	void
901	ev_idle_start (struct ev_idle *w)	1338	ev_child_start (EV_P_ struct ev_child *w)
902	{	1339	{
		1340	#if EV_MULTIPLICITY
		1341	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1342	#endif
903	if (ev_is_active (w))	1343	if (ev_is_active (w))
904	return;	1344	return;
905		1345
906	ev_start ((W)w, ++idlecnt);	1346	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1347	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1348	}
910		1349
911	void	1350	void
912	ev_idle_stop (struct ev_idle *w)	1351	ev_child_stop (EV_P_ struct ev_child *w)
913	{	1352	{
914	ev_clear ((W)w);	1353	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1354	if (ev_is_active (w))
916	return;	1355	return;
917		1356
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)
968	{
969	if (ev_is_active (w))
970	return;
971
972	ev_start ((W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}
975
976	void
977	ev_child_stop (struct ev_child *w)
978	{
979	ev_clear ((W)w);
980	if (ev_is_active (w))
981	return;
982
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1357	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1358	ev_stop (EV_A_ (W)w);
985	}	1359	}
986		1360
987	/*****************************************************************************/	1361	/*****************************************************************************/
988		1362
989	struct ev_once	1363	struct ev_once
…		…
993	void (cb)(int revents, void arg);	1367	void (cb)(int revents, void arg);
994	void *arg;	1368	void *arg;
995	};	1369	};
996		1370
997	static void	1371	static void
998	once_cb (struct ev_once *once, int revents)	1372	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1373	{
1000	void (cb)(int revents, void arg) = once->cb;	1374	void (cb)(int revents, void arg) = once->cb;
1001	void *arg = once->arg;	1375	void *arg = once->arg;
1002		1376
1003	ev_io_stop (&once->io);	1377	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1378	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1379	free (once);
1006		1380
1007	cb (revents, arg);	1381	cb (revents, arg);
1008	}	1382	}
1009		1383
1010	static void	1384	static void
1011	once_cb_io (struct ev_io *w, int revents)	1385	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1386	{
1013	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);
1014	}	1388	}
1015		1389
1016	static void	1390	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1391	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1392	{
1019	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);
1020	}	1394	}
1021		1395
1022	void	1396	void
1023	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)
1024	{	1398	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1399	struct ev_once *once = malloc (sizeof (struct ev_once));
1026		1400
1027	if (!once)	1401	if (!once)
1028	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1402	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1033		1407
1034	ev_watcher_init (&once->io, once_cb_io);	1408	ev_watcher_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1409	if (fd >= 0)
1036	{	1410	{
1037	ev_io_set (&once->io, fd, events);	1411	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1412	ev_io_start (EV_A_ &once->io);
1039	}	1413	}
1040		1414
1041	ev_watcher_init (&once->to, once_cb_to);	1415	ev_watcher_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1416	if (timeout >= 0.)
1043	{	1417	{
1044	ev_timer_set (&once->to, timeout, 0.);	1418	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1419	ev_timer_start (EV_A_ &once->to);
1046	}	1420	}
1047	}	1421	}
1048	}	1422	}
1049		1423
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}
1127
1128	#endif
1129
1130
1131
1132

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Comparing libev/ev.c (file contents): Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs. Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC