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

Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.50 by root, Sat Nov 3 19:41:55 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	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
41	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
42	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
43	#include <sys/time.h>	50	#include <sys/time.h>
44	#include <time.h>	51	#include <time.h>
45		52
		53	/**/
		54
46	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USE_POLL
		64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
47	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
49	# endif	84	#endif
50	#endif
51		85
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
62	#endif	89	#endif
		90
		91	/**/
63		92
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		97
68	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		113
70	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
73		117
74	static ev_tstamp now, diff; /* monotonic clock */	118	static ev_tstamp now_floor, now, diff; /* monotonic clock */
75	ev_tstamp ev_now;	119	ev_tstamp ev_now;
76	int ev_method;	120	int ev_method;
77		121
78	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
79		123
…		…
84	/*****************************************************************************/	128	/*****************************************************************************/
85		129
86	ev_tstamp	130	ev_tstamp
87	ev_time (void)	131	ev_time (void)
88	{	132	{
89	#if HAVE_REALTIME	133	#if EV_USE_REALTIME
90	struct timespec ts;	134	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	135	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	136	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	137	#else
94	struct timeval tv;	138	struct timeval tv;
…		…
98	}	142	}
99		143
100	static ev_tstamp	144	static ev_tstamp
101	get_clock (void)	145	get_clock (void)
102	{	146	{
103	#if HAVE_MONOTONIC	147	#if EV_USE_MONOTONIC
104	if (have_monotonic)	148	if (expect_true (have_monotonic))
105	{	149	{
106	struct timespec ts;	150	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	151	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	152	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	153	}
110	#endif	154	#endif
111		155
112	return ev_time ();	156	return ev_time ();
113	}	157	}
114		158
		159	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		160
115	#define array_needsize(base,cur,cnt,init) \	161	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	162	if (expect_false ((cnt) > cur)) \
117	{ \	163	{ \
118	int newcnt = cur; \	164	int newcnt = cur; \
119	do \	165	do \
120	{ \	166	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	167	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	168	} \
123	while ((cnt) > newcnt); \	169	while ((cnt) > newcnt); \
124	\	170	\
125	base = realloc (base, sizeof (base) (newcnt)); \	171	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	172	init (base + cur, newcnt - cur); \
…		…
129		175
130	/*****************************************************************************/	176	/*****************************************************************************/
131		177
132	typedef struct	178	typedef struct
133	{	179	{
134	struct ev_io *head;	180	struct ev_watcher_list *head;
135	int events;	181	unsigned char events;
		182	unsigned char reify;
136	} ANFD;	183	} ANFD;
137		184
138	static ANFD *anfds;	185	static ANFD *anfds;
139	static int anfdmax;	186	static int anfdmax;
140		187
…		…
143	{	190	{
144	while (count--)	191	while (count--)
145	{	192	{
146	base->head = 0;	193	base->head = 0;
147	base->events = EV_NONE;	194	base->events = EV_NONE;
		195	base->reify = 0;
		196
148	++base;	197	++base;
149	}	198	}
150	}	199	}
151		200
152	typedef struct	201	typedef struct
153	{	202	{
154	W w;	203	W w;
155	int events;	204	int events;
156	} ANPENDING;	205	} ANPENDING;
157		206
158	static ANPENDING *pendings;	207	static ANPENDING *pendings [NUMPRI];
159	static int pendingmax, pendingcnt;	208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
160		209
161	static void	210	static void
162	event (W w, int events)	211	event (W w, int events)
163	{	212	{
164	if (w->active)	213	if (w->pending)
165	{	214	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	215	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		216	return;
170	}	217	}
		218
		219	w->pending = ++pendingcnt [ABSPRI (w)];
		220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		221	pendings [ABSPRI (w)][w->pending - 1].w = w;
		222	pendings [ABSPRI (w)][w->pending - 1].events = events;
171	}	223	}
172		224
173	static void	225	static void
174	queue_events (W *events, int eventcnt, int type)	226	queue_events (W *events, int eventcnt, int type)
175	{	227	{
…		…
183	fd_event (int fd, int events)	235	fd_event (int fd, int events)
184	{	236	{
185	ANFD *anfd = anfds + fd;	237	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	238	struct ev_io *w;
187		239
188	for (w = anfd->head; w; w = w->next)	240	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
189	{	241	{
190	int ev = w->events & events;	242	int ev = w->events & events;
191		243
192	if (ev)	244	if (ev)
193	event ((W)w, ev);	245	event ((W)w, ev);
…		…
210	ANFD *anfd = anfds + fd;	262	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	263	struct ev_io *w;
212		264
213	int events = 0;	265	int events = 0;
214		266
215	for (w = anfd->head; w; w = w->next)	267	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
216	events \|= w->events;	268	events \|= w->events;
217		269
218	anfd->events &= ~EV_REIFY;	270	anfd->reify = 0;
219		271
220	if (anfd->events != events)	272	if (anfd->events != events)
221	{	273	{
222	method_modify (fd, anfd->events, events);	274	method_modify (fd, anfd->events, events);
223	anfd->events = events;	275	anfd->events = events;
…		…
228	}	280	}
229		281
230	static void	282	static void
231	fd_change (int fd)	283	fd_change (int fd)
232	{	284	{
233	if (anfds [fd].events & EV_REIFY)	285	if (anfds [fd].reify \|\| fdchangecnt < 0)
234	return;	286	return;
235		287
236	anfds [fd].events \|= EV_REIFY;	288	anfds [fd].reify = 1;
237		289
238	++fdchangecnt;	290	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
240	fdchanges [fdchangecnt - 1] = fd;	292	fdchanges [fdchangecnt - 1] = fd;
241	}	293	}
242		294
		295	static void
		296	fd_kill (int fd)
		297	{
		298	struct ev_io *w;
		299
		300	while ((w = (struct ev_io *)anfds [fd].head))
		301	{
		302	ev_io_stop (w);
		303	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		304	}
		305	}
		306
243	/* called on EBADF to verify fds */	307	/* called on EBADF to verify fds */
244	static void	308	static void
245	fd_recheck (void)	309	fd_ebadf (void)
246	{	310	{
247	int fd;	311	int fd;
248		312
249	for (fd = 0; fd < anfdmax; ++fd)	313	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	314	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
252	while (anfds [fd].head)	316	fd_kill (fd);
		317	}
		318
		319	/* called on ENOMEM in select/poll to kill some fds and retry */
		320	static void
		321	fd_enomem (void)
		322	{
		323	int fd = anfdmax;
		324
		325	while (fd--)
		326	if (anfds [fd].events)
253	{	327	{
254	event ((W)anfds [fd].head, EV_ERROR);	328	close (fd);
255	ev_io_stop (anfds [fd].head);	329	fd_kill (fd);
		330	return;
256	}	331	}
257	}	332	}
258		333
259	/*****************************************************************************/	334	/*****************************************************************************/
260		335
261	static struct ev_timer **timers;	336	static struct ev_timer **timers;
…		…
307		382
308	/*****************************************************************************/	383	/*****************************************************************************/
309		384
310	typedef struct	385	typedef struct
311	{	386	{
312	struct ev_signal *head;	387	struct ev_watcher_list *head;
313	sig_atomic_t gotsig;	388	sig_atomic_t volatile gotsig;
314	} ANSIG;	389	} ANSIG;
315		390
316	static ANSIG *signals;	391	static ANSIG *signals;
317	static int signalmax;	392	static int signalmax;
318		393
319	static int sigpipe [2];	394	static int sigpipe [2];
320	static sig_atomic_t gotsig;	395	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;	396	static struct ev_io sigev;
322		397
323	static void	398	static void
324	signals_init (ANSIG *base, int count)	399	signals_init (ANSIG *base, int count)
325	{	400	{
326	while (count--)	401	while (count--)
327	{	402	{
328	base->head = 0;	403	base->head = 0;
329	base->gotsig = 0;	404	base->gotsig = 0;
		405
330	++base;	406	++base;
331	}	407	}
332	}	408	}
333		409
334	static void	410	static void
…		…
336	{	412	{
337	signals [signum - 1].gotsig = 1;	413	signals [signum - 1].gotsig = 1;
338		414
339	if (!gotsig)	415	if (!gotsig)
340	{	416	{
		417	int old_errno = errno;
341	gotsig = 1;	418	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	419	write (sigpipe [1], &signum, 1);
		420	errno = old_errno;
343	}	421	}
344	}	422	}
345		423
346	static void	424	static void
347	sigcb (struct ev_io *iow, int revents)	425	sigcb (struct ev_io *iow, int revents)
348	{	426	{
349	struct ev_signal *w;	427	struct ev_watcher_list *w;
350	int sig;	428	int signum;
351		429
		430	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	431	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		432
355	for (sig = signalmax; sig--; )	433	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	434	if (signals [signum].gotsig)
357	{	435	{
358	signals [sig].gotsig = 0;	436	signals [signum].gotsig = 0;
359		437
360	for (w = signals [sig].head; w; w = w->next)	438	for (w = signals [signum].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);	439	event ((W)w, EV_SIGNAL);
362	}	440	}
363	}	441	}
364		442
365	static void	443	static void
366	siginit (void)	444	siginit (void)
367	{	445	{
		446	#ifndef WIN32
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370		449
371	/* rather than sort out wether we really need nb, set it */	450	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		453	#endif
374		454
375	ev_io_set (&sigev, sigpipe [0], EV_READ);	455	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	ev_io_start (&sigev);	456	ev_io_start (&sigev);
377	}	457	}
378		458
…		…
390	/*****************************************************************************/	470	/*****************************************************************************/
391		471
392	static struct ev_child *childs [PID_HASHSIZE];	472	static struct ev_child *childs [PID_HASHSIZE];
393	static struct ev_signal childev;	473	static struct ev_signal childev;
394		474
		475	#ifndef WIN32
		476
395	#ifndef WCONTINUED	477	#ifndef WCONTINUED
396	# define WCONTINUED 0	478	# define WCONTINUED 0
397	#endif	479	#endif
398		480
399	static void	481	static void
		482	child_reap (struct ev_signal *sw, int chain, int pid, int status)
		483	{
		484	struct ev_child *w;
		485
		486	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		487	if (w->pid == pid \|\| !w->pid)
		488	{
		489	w->priority = sw->priority; /* need to do it now */
		490	w->rpid = pid;
		491	w->rstatus = status;
		492	event ((W)w, EV_CHILD);
		493	}
		494	}
		495
		496	static void
400	childcb (struct ev_signal *sw, int revents)	497	childcb (struct ev_signal *sw, int revents)
401	{	498	{
402	struct ev_child *w;
403	int pid, status;	499	int pid, status;
404		500
405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	501	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	502	{
407	if (w->pid == pid \|\| w->pid == -1)	503	/* make sure we are called again until all childs have been reaped */
408	{
409	w->status = status;
410	event ((W)w, EV_CHILD);	504	event ((W)sw, EV_SIGNAL);
411	}	505
		506	child_reap (sw, pid, pid, status);
		507	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		508	}
412	}	509	}
		510
		511	#endif
413		512
414	/*****************************************************************************/	513	/*****************************************************************************/
415		514
		515	#if EV_USE_KQUEUE
		516	# include "ev_kqueue.c"
		517	#endif
416	#if HAVE_EPOLL	518	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	519	# include "ev_epoll.c"
418	#endif	520	#endif
		521	#if EV_USE_POLL
		522	# include "ev_poll.c"
		523	#endif
419	#if HAVE_SELECT	524	#if EV_USE_SELECT
420	# include "ev_select.c"	525	# include "ev_select.c"
421	#endif	526	#endif
422		527
423	int	528	int
424	ev_version_major (void)	529	ev_version_major (void)
…		…
430	ev_version_minor (void)	535	ev_version_minor (void)
431	{	536	{
432	return EV_VERSION_MINOR;	537	return EV_VERSION_MINOR;
433	}	538	}
434		539
		540	/* return true if we are running with elevated privileges and should ignore env variables */
		541	static int
		542	enable_secure ()
		543	{
		544	#ifdef WIN32
		545	return 0;
		546	#else
		547	return getuid () != geteuid ()
		548	\|\| getgid () != getegid ();
		549	#endif
		550	}
		551
435	int ev_init (int flags)	552	int ev_init (int methods)
436	{	553	{
437	if (!ev_method)	554	if (!ev_method)
438	{	555	{
439	#if HAVE_MONOTONIC	556	#if EV_USE_MONOTONIC
440	{	557	{
441	struct timespec ts;	558	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	560	have_monotonic = 1;
444	}	561	}
445	#endif	562	#endif
446		563
447	ev_now = ev_time ();	564	ev_now = ev_time ();
448	now = get_clock ();	565	now = get_clock ();
		566	now_floor = now;
449	diff = ev_now - now;	567	diff = ev_now - now;
450		568
451	if (pipe (sigpipe))	569	if (pipe (sigpipe))
452	return 0;	570	return 0;
453		571
		572	if (methods == EVMETHOD_AUTO)
		573	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		574	methods = atoi (getenv ("LIBEV_METHODS"));
		575	else
454	ev_method = EVMETHOD_NONE;	576	methods = EVMETHOD_ANY;
		577
		578	ev_method = 0;
		579	#if EV_USE_KQUEUE
		580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		581	#endif
455	#if HAVE_EPOLL	582	#if EV_USE_EPOLL
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
457	#endif	584	#endif
		585	#if EV_USE_POLL
		586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
		587	#endif
458	#if HAVE_SELECT	588	#if EV_USE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);	589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
460	#endif	590	#endif
461		591
462	if (ev_method)	592	if (ev_method)
463	{	593	{
464	ev_watcher_init (&sigev, sigcb);	594	ev_watcher_init (&sigev, sigcb);
		595	ev_set_priority (&sigev, EV_MAXPRI);
465	siginit ();	596	siginit ();
466		597
		598	#ifndef WIN32
467	ev_signal_init (&childev, childcb, SIGCHLD);	599	ev_signal_init (&childev, childcb, SIGCHLD);
		600	ev_set_priority (&childev, EV_MAXPRI);
468	ev_signal_start (&childev);	601	ev_signal_start (&childev);
		602	#endif
469	}	603	}
470	}	604	}
471		605
472	return ev_method;	606	return ev_method;
473	}	607	}
474		608
475	/*****************************************************************************/	609	/*****************************************************************************/
476		610
477	void	611	void
478	ev_prefork (void)	612	ev_fork_prepare (void)
479	{	613	{
480	/* nop */	614	/* nop */
481	}	615	}
482		616
483	void	617	void
484	ev_postfork_parent (void)	618	ev_fork_parent (void)
485	{	619	{
486	/* nop */	620	/* nop */
487	}	621	}
488		622
489	void	623	void
490	ev_postfork_child (void)	624	ev_fork_child (void)
491	{	625	{
492	#if HAVE_EPOLL	626	#if EV_USE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)	627	if (ev_method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();	628	epoll_postfork_child ();
495	#endif	629	#endif
496		630
497	ev_io_stop (&sigev);	631	ev_io_stop (&sigev);
…		…
504	/*****************************************************************************/	638	/*****************************************************************************/
505		639
506	static void	640	static void
507	call_pending (void)	641	call_pending (void)
508	{	642	{
		643	int pri;
		644
		645	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	646	while (pendingcnt [pri])
510	{	647	{
511	ANPENDING *p = pendings + --pendingcnt;	648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		649
513	if (p->w)	650	if (p->w)
514	{	651	{
515	p->w->pending = 0;	652	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	653	p->w->cb (p->w, p->events);
517	}	654	}
518	}	655	}
519	}	656	}
520		657
521	static void	658	static void
522	timers_reify (void)	659	timers_reify (void)
523	{	660	{
524	while (timercnt && timers [0]->at <= now)	661	while (timercnt && timers [0]->at <= now)
525	{	662	{
526	struct ev_timer *w = timers [0];	663	struct ev_timer *w = timers [0];
527
528	event ((W)w, EV_TIMEOUT);
529		664
530	/* first reschedule or stop timer */	665	/* first reschedule or stop timer */
531	if (w->repeat)	666	if (w->repeat)
532	{	667	{
		668	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	669	w->at = now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	670	downheap ((WT *)timers, timercnt, 0);
536	}	671	}
537	else	672	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	673	ev_timer_stop (w); /* nonrepeating: stop timer */
		674
		675	event ((W)w, EV_TIMEOUT);
539	}	676	}
540	}	677	}
541		678
542	static void	679	static void
543	periodics_reify (void)	680	periodics_reify (void)
…		…
548		685
549	/* first reschedule or stop timer */	686	/* first reschedule or stop timer */
550	if (w->interval)	687	if (w->interval)
551	{	688	{
552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
553	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));
554	downheap ((WT *)periodics, periodiccnt, 0);	691	downheap ((WT *)periodics, periodiccnt, 0);
555	}	692	}
556	else	693	else
557	ev_periodic_stop (w); /* nonrepeating: stop timer */	694	ev_periodic_stop (w); /* nonrepeating: stop timer */
558		695
559	event ((W)w, EV_TIMEOUT);	696	event ((W)w, EV_PERIODIC);
560	}	697	}
561	}	698	}
562		699
563	static void	700	static void
564	periodics_reschedule (ev_tstamp diff)	701	periodics_reschedule (ev_tstamp diff)
…		…
583	}	720	}
584	}	721	}
585	}	722	}
586	}	723	}
587		724
		725	static int
		726	time_update_monotonic (void)
		727	{
		728	now = get_clock ();
		729
		730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))
		731	{
		732	ev_now = now + diff;
		733	return 0;
		734	}
		735	else
		736	{
		737	now_floor = now;
		738	ev_now = ev_time ();
		739	return 1;
		740	}
		741	}
		742
588	static void	743	static void
589	time_update (void)	744	time_update (void)
590	{	745	{
591	int i;	746	int i;
592		747
593	ev_now = ev_time ();	748	#if EV_USE_MONOTONIC
594
595	if (have_monotonic)	749	if (expect_true (have_monotonic))
596	{	750	{
597	ev_tstamp odiff = diff;	751	if (time_update_monotonic ())
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	752	{
601	now = get_clock ();	753	ev_tstamp odiff = diff;
		754
		755	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		756	{
602	diff = ev_now - now;	757	diff = ev_now - now;
603		758
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)	759	if (fabs (odiff - diff) < MIN_TIMEJUMP)
605	return; /* all is well */	760	return; /* all is well */
606		761
607	ev_now = ev_time ();	762	ev_now = ev_time ();
		763	now = get_clock ();
		764	now_floor = now;
		765	}
		766
		767	periodics_reschedule (diff - odiff);
		768	/* no timer adjustment, as the monotonic clock doesn't jump */
608	}	769	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}	770	}
613	else	771	else
		772	#endif
614	{	773	{
		774	ev_now = ev_time ();
		775
615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	776	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
616	{	777	{
617	periodics_reschedule (ev_now - now);	778	periodics_reschedule (ev_now - now);
618		779
619	/* adjust timers. this is easy, as the offset is the same for all */	780	/* adjust timers. this is easy, as the offset is the same for all */
620	for (i = 0; i < timercnt; ++i)	781	for (i = 0; i < timercnt; ++i)
…		…
633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	794	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
634		795
635	do	796	do
636	{	797	{
637	/* queue check watchers (and execute them) */	798	/* queue check watchers (and execute them) */
638	if (preparecnt)	799	if (expect_false (preparecnt))
639	{	800	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	802	call_pending ();
642	}	803	}
643		804
…		…
646		807
647	/* calculate blocking time */	808	/* calculate blocking time */
648		809
649	/* we only need this for !monotonic clockor timers, but as we basically	810	/* we only need this for !monotonic clockor timers, but as we basically
650	always have timers, we just calculate it always */	811	always have timers, we just calculate it always */
		812	#if EV_USE_MONOTONIC
		813	if (expect_true (have_monotonic))
		814	time_update_monotonic ();
		815	else
		816	#endif
		817	{
651	ev_now = ev_time ();	818	ev_now = ev_time ();
		819	now = ev_now;
		820	}
652		821
653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	822	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
654	block = 0.;	823	block = 0.;
655	else	824	else
656	{	825	{
657	block = MAX_BLOCKTIME;	826	block = MAX_BLOCKTIME;
658		827
659	if (timercnt)	828	if (timercnt)
660	{	829	{
661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	830	ev_tstamp to = timers [0]->at - now + method_fudge;
662	if (block > to) block = to;	831	if (block > to) block = to;
663	}	832	}
664		833
665	if (periodiccnt)	834	if (periodiccnt)
666	{	835	{
…		…
719	head = &(*head)->next;	888	head = &(*head)->next;
720	}	889	}
721	}	890	}
722		891
723	static void	892	static void
724	ev_clear (W w)	893	ev_clear_pending (W w)
725	{	894	{
726	if (w->pending)	895	if (w->pending)
727	{	896	{
728	pendings [w->pending - 1].w = 0;	897	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	898	w->pending = 0;
730	}	899	}
731	}	900	}
732		901
733	static void	902	static void
734	ev_start (W w, int active)	903	ev_start (W w, int active)
735	{	904	{
		905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		907
736	w->active = active;	908	w->active = active;
737	}	909	}
738		910
739	static void	911	static void
740	ev_stop (W w)	912	ev_stop (W w)
…		…
745	/*****************************************************************************/	917	/*****************************************************************************/
746		918
747	void	919	void
748	ev_io_start (struct ev_io *w)	920	ev_io_start (struct ev_io *w)
749	{	921	{
		922	int fd = w->fd;
		923
750	if (ev_is_active (w))	924	if (ev_is_active (w))
751	return;	925	return;
752		926
753	int fd = w->fd;	927	assert (("ev_io_start called with negative fd", fd >= 0));
754		928
755	ev_start ((W)w, 1);	929	ev_start ((W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	931	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		932
…		…
760	}	934	}
761		935
762	void	936	void
763	ev_io_stop (struct ev_io *w)	937	ev_io_stop (struct ev_io *w)
764	{	938	{
765	ev_clear ((W)w);	939	ev_clear_pending ((W)w);
766	if (!ev_is_active (w))	940	if (!ev_is_active (w))
767	return;	941	return;
768		942
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	944	ev_stop ((W)w);
…		…
778	if (ev_is_active (w))	952	if (ev_is_active (w))
779	return;	953	return;
780		954
781	w->at += now;	955	w->at += now;
782		956
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	957	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		958
785	ev_start ((W)w, ++timercnt);	959	ev_start ((W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	960	array_needsize (timers, timermax, timercnt, );
787	timers [timercnt - 1] = w;	961	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	962	upheap ((WT *)timers, timercnt - 1);
789	}	963	}
790		964
791	void	965	void
792	ev_timer_stop (struct ev_timer *w)	966	ev_timer_stop (struct ev_timer *w)
793	{	967	{
794	ev_clear ((W)w);	968	ev_clear_pending ((W)w);
795	if (!ev_is_active (w))	969	if (!ev_is_active (w))
796	return;	970	return;
797		971
798	if (w->active < timercnt--)	972	if (w->active < timercnt--)
799	{	973	{
…		…
827	ev_periodic_start (struct ev_periodic *w)	1001	ev_periodic_start (struct ev_periodic *w)
828	{	1002	{
829	if (ev_is_active (w))	1003	if (ev_is_active (w))
830	return;	1004	return;
831		1005
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1006	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
833		1007
834	/* this formula differs from the one in periodic_reify because we do not always round up */	1008	/* this formula differs from the one in periodic_reify because we do not always round up */
835	if (w->interval)	1009	if (w->interval)
836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
837		1011
…		…
842	}	1016	}
843		1017
844	void	1018	void
845	ev_periodic_stop (struct ev_periodic *w)	1019	ev_periodic_stop (struct ev_periodic *w)
846	{	1020	{
847	ev_clear ((W)w);	1021	ev_clear_pending ((W)w);
848	if (!ev_is_active (w))	1022	if (!ev_is_active (w))
849	return;	1023	return;
850		1024
851	if (w->active < periodiccnt--)	1025	if (w->active < periodiccnt--)
852	{	1026	{
…		…
855	}	1029	}
856		1030
857	ev_stop ((W)w);	1031	ev_stop ((W)w);
858	}	1032	}
859		1033
		1034	#ifndef SA_RESTART
		1035	# define SA_RESTART 0
		1036	#endif
		1037
860	void	1038	void
861	ev_signal_start (struct ev_signal *w)	1039	ev_signal_start (struct ev_signal *w)
862	{	1040	{
863	if (ev_is_active (w))	1041	if (ev_is_active (w))
864	return;	1042	return;
		1043
		1044	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
865		1045
866	ev_start ((W)w, 1);	1046	ev_start ((W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1047	array_needsize (signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1049
870	if (!w->next)	1050	if (!w->next)
871	{	1051	{
872	struct sigaction sa;	1052	struct sigaction sa;
873	sa.sa_handler = sighandler;	1053	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1054	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1055	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1056	sigaction (w->signum, &sa, 0);
877	}	1057	}
878	}	1058	}
879		1059
880	void	1060	void
881	ev_signal_stop (struct ev_signal *w)	1061	ev_signal_stop (struct ev_signal *w)
882	{	1062	{
883	ev_clear ((W)w);	1063	ev_clear_pending ((W)w);
884	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
885	return;	1065	return;
886		1066
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1068	ev_stop ((W)w);
…		…
903	}	1083	}
904		1084
905	void	1085	void
906	ev_idle_stop (struct ev_idle *w)	1086	ev_idle_stop (struct ev_idle *w)
907	{	1087	{
908	ev_clear ((W)w);	1088	ev_clear_pending ((W)w);
909	if (ev_is_active (w))	1089	if (ev_is_active (w))
910	return;	1090	return;
911		1091
912	idles [w->active - 1] = idles [--idlecnt];	1092	idles [w->active - 1] = idles [--idlecnt];
913	ev_stop ((W)w);	1093	ev_stop ((W)w);
…		…
925	}	1105	}
926		1106
927	void	1107	void
928	ev_prepare_stop (struct ev_prepare *w)	1108	ev_prepare_stop (struct ev_prepare *w)
929	{	1109	{
930	ev_clear ((W)w);	1110	ev_clear_pending ((W)w);
931	if (ev_is_active (w))	1111	if (ev_is_active (w))
932	return;	1112	return;
933		1113
934	prepares [w->active - 1] = prepares [--preparecnt];	1114	prepares [w->active - 1] = prepares [--preparecnt];
935	ev_stop ((W)w);	1115	ev_stop ((W)w);
…		…
947	}	1127	}
948		1128
949	void	1129	void
950	ev_check_stop (struct ev_check *w)	1130	ev_check_stop (struct ev_check *w)
951	{	1131	{
952	ev_clear ((W)w);	1132	ev_clear_pending ((W)w);
953	if (ev_is_active (w))	1133	if (ev_is_active (w))
954	return;	1134	return;
955		1135
956	checks [w->active - 1] = checks [--checkcnt];	1136	checks [w->active - 1] = checks [--checkcnt];
957	ev_stop ((W)w);	1137	ev_stop ((W)w);
…		…
968	}	1148	}
969		1149
970	void	1150	void
971	ev_child_stop (struct ev_child *w)	1151	ev_child_stop (struct ev_child *w)
972	{	1152	{
973	ev_clear ((W)w);	1153	ev_clear_pending ((W)w);
974	if (ev_is_active (w))	1154	if (ev_is_active (w))
975	return;	1155	return;
976		1156
977	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
978	ev_stop ((W)w);	1158	ev_stop ((W)w);
…		…
1017	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1197	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1018	{	1198	{
1019	struct ev_once *once = malloc (sizeof (struct ev_once));	1199	struct ev_once *once = malloc (sizeof (struct ev_once));
1020		1200
1021	if (!once)	1201	if (!once)
1022	cb (EV_ERROR, arg);	1202	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1023	else	1203	else
1024	{	1204	{
1025	once->cb = cb;	1205	once->cb = cb;
1026	once->arg = arg;	1206	once->arg = arg;
1027		1207
1028	ev_watcher_init (&once->io, once_cb_io);	1208	ev_watcher_init (&once->io, once_cb_io);
1029
1030	if (fd >= 0)	1209	if (fd >= 0)
1031	{	1210	{
1032	ev_io_set (&once->io, fd, events);	1211	ev_io_set (&once->io, fd, events);
1033	ev_io_start (&once->io);	1212	ev_io_start (&once->io);
1034	}	1213	}
1035		1214
1036	ev_watcher_init (&once->to, once_cb_to);	1215	ev_watcher_init (&once->to, once_cb_to);
1037
1038	if (timeout >= 0.)	1216	if (timeout >= 0.)
1039	{	1217	{
1040	ev_timer_set (&once->to, timeout, 0.);	1218	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1219	ev_timer_start (&once->to);
1042	}	1220	}

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Comparing libev/ev.c (file contents): Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs. Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 2007 UTC vs.
Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC