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

Comparing libev/ev.c (file contents):
Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC

…		…
28	* (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
29	* 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.
30	*/	30	*/
31	#ifndef EV_STANDALONE	31	#ifndef EV_STANDALONE
32	# 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
33	#endif	55	#endif
34		56
35	#include <math.h>	57	#include <math.h>
36	#include <stdlib.h>	58	#include <stdlib.h>
37	#include <unistd.h>	59	#include <unistd.h>
…		…
58		80
59	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
60	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
61	#endif	83	#endif
62		84
63	#ifndef EV_USEV_POLL	85	#ifndef EV_USE_POLL
64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */	86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
65	#endif	87	#endif
66		88
67	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
68	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
69	#endif	91	#endif
70		92
71	#ifndef EV_USE_KQUEUE	93	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	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
73	#endif	103	#endif
74		104
75	#ifndef EV_USE_REALTIME	105	#ifndef EV_USE_REALTIME
76	# define EV_USE_REALTIME 1	106	# define EV_USE_REALTIME 1
77	#endif	107	#endif
…		…
113		143
114	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
117		147
118	static ev_tstamp now_floor, mn_now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
119	static ev_tstamp rt_now;
120	static int method;
121		149
122	static int have_monotonic; /* runtime */	150	#if WIN32
123		151	/* note: the comment below could not be substantiated, but what would I care */
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
125	static void (*method_modify)(EV_P_ int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
126	static void (*method_poll)(EV_P_ ev_tstamp timeout);
127
128	static int activecnt; /* number of active events */
129
130	#if EV_USE_SELECT
131	static unsigned char vec_ri, vec_ro, vec_wi, vec_wo;
132	static int vec_max;
133	#endif	154	#endif
134		155
135	#if EV_USEV_POLL	156	/*****************************************************************************/
136	static struct pollfd *polls;
137	static int pollmax, pollcnt;
138	static int pollidxs; / maps fds into structure indices */
139	static int pollidxmax;
140	#endif
141		157
142	#if EV_USE_EPOLL	158	typedef struct
143	static int epoll_fd = -1;	159	{
		160	struct ev_watcher_list *head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
144		164
145	static struct epoll_event *events;	165	typedef struct
146	static int eventmax;	166	{
147	#endif	167	W w;
		168	int events;
		169	} ANPENDING;
148		170
149	#if EV_USE_KQUEUE	171	#if EV_MULTIPLICITY
150	static int kqueue_fd;	172
151	static struct kevent *kqueue_changes;	173	struct ev_loop
152	static int kqueue_changemax, kqueue_changecnt;	174	{
153	static struct kevent *kqueue_events;	175	# define VAR(name,decl) decl;
154	static int kqueue_eventmax;	176	# include "ev_vars.h"
		177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
		180
		181	#else
		182
		183	# define VAR(name,decl) static decl;
		184	# include "ev_vars.h"
		185	# undef VAR
		186
155	#endif	187	#endif
156		188
157	/*****************************************************************************/	189	/*****************************************************************************/
158		190
159	inline ev_tstamp	191	inline ev_tstamp
…		…
206	base = realloc (base, sizeof (base) (newcnt)); \	238	base = realloc (base, sizeof (base) (newcnt)); \
207	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
208	cur = newcnt; \	240	cur = newcnt; \
209	}	241	}
210		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (base) (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
211	/*****************************************************************************/	254	/*****************************************************************************/
212
213	typedef struct
214	{
215	struct ev_watcher_list *head;
216	unsigned char events;
217	unsigned char reify;
218	} ANFD;
219
220	static ANFD *anfds;
221	static int anfdmax;
222		255
223	static void	256	static void
224	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
225	{	258	{
226	while (count--)	259	while (count--)
…		…
230	base->reify = 0;	263	base->reify = 0;
231		264
232	++base;	265	++base;
233	}	266	}
234	}	267	}
235
236	typedef struct
237	{
238	W w;
239	int events;
240	} ANPENDING;
241
242	static ANPENDING *pendings [NUMPRI];
243	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
244		268
245	static void	269	static void
246	event (EV_P_ W w, int events)	270	event (EV_P_ W w, int events)
247	{	271	{
248	if (w->pending)	272	if (w->pending)
…		…
281	}	305	}
282	}	306	}
283		307
284	/*****************************************************************************/	308	/*****************************************************************************/
285		309
286	static int *fdchanges;
287	static int fdchangemax, fdchangecnt;
288
289	static void	310	static void
290	fd_reify (EV_P)	311	fd_reify (EV_P)
291	{	312	{
292	int i;	313	int i;
293		314
…		…
302	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)	323	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
303	events \|= w->events;	324	events \|= w->events;
304		325
305	anfd->reify = 0;	326	anfd->reify = 0;
306		327
307	if (anfd->events != events)
308	{
309	method_modify (EV_A_ fd, anfd->events, events);	328	method_modify (EV_A_ fd, anfd->events, events);
310	anfd->events = events;	329	anfd->events = events;
311	}
312	}	330	}
313		331
314	fdchangecnt = 0;	332	fdchangecnt = 0;
315	}	333	}
316		334
…		…
353		371
354	/* called on ENOMEM in select/poll to kill some fds and retry */	372	/* called on ENOMEM in select/poll to kill some fds and retry */
355	static void	373	static void
356	fd_enomem (EV_P)	374	fd_enomem (EV_P)
357	{	375	{
358	int fd = anfdmax;	376	int fd;
359		377
360	while (fd--)	378	for (fd = anfdmax; fd--; )
361	if (anfds [fd].events)	379	if (anfds [fd].events)
362	{	380	{
363	close (fd);	381	close (fd);
364	fd_kill (EV_A_ fd);	382	fd_kill (EV_A_ fd);
365	return;	383	return;
366	}	384	}
367	}	385	}
368		386
		387	/* susually called after fork if method needs to re-arm all fds from scratch */
		388	static void
		389	fd_rearm_all (EV_P)
		390	{
		391	int fd;
		392
		393	/* this should be highly optimised to not do anything but set a flag */
		394	for (fd = 0; fd < anfdmax; ++fd)
		395	if (anfds [fd].events)
		396	{
		397	anfds [fd].events = 0;
		398	fd_change (EV_A_ fd);
		399	}
		400	}
		401
369	/*****************************************************************************/	402	/*****************************************************************************/
370		403
371	static struct ev_timer **timers;
372	static int timermax, timercnt;
373
374	static struct ev_periodic **periodics;
375	static int periodicmax, periodiccnt;
376
377	static void	404	static void
378	upheap (WT *timers, int k)	405	upheap (WT *heap, int k)
379	{	406	{
380	WT w = timers [k];	407	WT w = heap [k];
381		408
382	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
383	{	410	{
384	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
385	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
386	k >>= 1;	413	k >>= 1;
387	}	414	}
388		415
389	timers [k] = w;	416	heap [k] = w;
390	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
391		418
392	}	419	}
393		420
394	static void	421	static void
395	downheap (WT *timers, int N, int k)	422	downheap (WT *heap, int N, int k)
396	{	423	{
397	WT w = timers [k];	424	WT w = heap [k];
398		425
399	while (k < (N >> 1))	426	while (k < (N >> 1))
400	{	427	{
401	int j = k << 1;	428	int j = k << 1;
402		429
403	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
404	++j;	431	++j;
405		432
406	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
407	break;	434	break;
408		435
409	timers [k] = timers [j];	436	heap [k] = heap [j];
410	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
411	k = j;	438	k = j;
412	}	439	}
413		440
414	timers [k] = w;	441	heap [k] = w;
415	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
416	}	443	}
417		444
418	/*****************************************************************************/	445	/*****************************************************************************/
419		446
420	typedef struct	447	typedef struct
…		…
443	}	470	}
444		471
445	static void	472	static void
446	sighandler (int signum)	473	sighandler (int signum)
447	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
448	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
449		480
450	if (!gotsig)	481	if (!gotsig)
451	{	482	{
452	int old_errno = errno;	483	int old_errno = errno;
…		…
486	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
487	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
488	#endif	519	#endif
489		520
490	ev_io_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
491	ev_io_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
492	ev_unref (EV_A); /* child watcher should not keep loop alive */	523	ev_unref (EV_A); /* child watcher should not keep loop alive */
493	}	524	}
494		525
495	/*****************************************************************************/	526	/*****************************************************************************/
496		527
497	static struct ev_idle **idles;	528	#ifndef WIN32
498	static int idlemax, idlecnt;
499
500	static struct ev_prepare **prepares;
501	static int preparemax, preparecnt;
502
503	static struct ev_check **checks;
504	static int checkmax, checkcnt;
505
506	/*****************************************************************************/
507		529
508	static struct ev_child *childs [PID_HASHSIZE];	530	static struct ev_child *childs [PID_HASHSIZE];
509	static struct ev_signal childev;	531	static struct ev_signal childev;
510
511	#ifndef WIN32
512		532
513	#ifndef WCONTINUED	533	#ifndef WCONTINUED
514	# define WCONTINUED 0	534	# define WCONTINUED 0
515	#endif	535	#endif
516		536
…		…
520	struct ev_child *w;	540	struct ev_child *w;
521		541
522	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)	542	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
523	if (w->pid == pid \|\| !w->pid)	543	if (w->pid == pid \|\| !w->pid)
524	{	544	{
525	w->priority = sw->priority; /* need to do it now */	545	ev_priority (w) = ev_priority (sw); /* need to do it now */
526	w->rpid = pid;	546	w->rpid = pid;
527	w->rstatus = status;	547	w->rstatus = status;
528	event (EV_A_ (W)w, EV_CHILD);	548	event (EV_A_ (W)w, EV_CHILD);
529	}	549	}
530	}	550	}
531		551
532	static void	552	static void
…		…
552	# include "ev_kqueue.c"	572	# include "ev_kqueue.c"
553	#endif	573	#endif
554	#if EV_USE_EPOLL	574	#if EV_USE_EPOLL
555	# include "ev_epoll.c"	575	# include "ev_epoll.c"
556	#endif	576	#endif
557	#if EV_USEV_POLL	577	#if EV_USE_POLL
558	# include "ev_poll.c"	578	# include "ev_poll.c"
559	#endif	579	#endif
560	#if EV_USE_SELECT	580	#if EV_USE_SELECT
561	# include "ev_select.c"	581	# include "ev_select.c"
562	#endif	582	#endif
…		…
589	ev_method (EV_P)	609	ev_method (EV_P)
590	{	610	{
591	return method;	611	return method;
592	}	612	}
593		613
594	int	614	static void
595	ev_init (EV_P_ int methods)	615	loop_init (EV_P_ int methods)
596	{	616	{
597	if (!method)	617	if (!method)
598	{	618	{
599	#if EV_USE_MONOTONIC	619	#if EV_USE_MONOTONIC
600	{	620	{
…		…
605	#endif	625	#endif
606		626
607	rt_now = ev_time ();	627	rt_now = ev_time ();
608	mn_now = get_clock ();	628	mn_now = get_clock ();
609	now_floor = mn_now;	629	now_floor = mn_now;
610	diff = rt_now - mn_now;	630	rtmn_diff = rt_now - mn_now;
611
612	if (pipe (sigpipe))
613	return 0;
614		631
615	if (methods == EVMETHOD_AUTO)	632	if (methods == EVMETHOD_AUTO)
616	if (!enable_secure () && getenv ("LIBmethodS"))	633	if (!enable_secure () && getenv ("LIBEV_METHODS"))
617	methods = atoi (getenv ("LIBmethodS"));	634	methods = atoi (getenv ("LIBEV_METHODS"));
618	else	635	else
619	methods = EVMETHOD_ANY;	636	methods = EVMETHOD_ANY;
620		637
621	method = 0;	638	method = 0;
		639	#if EV_USE_WIN32
		640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		641	#endif
622	#if EV_USE_KQUEUE	642	#if EV_USE_KQUEUE
623	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
624	#endif	644	#endif
625	#if EV_USE_EPOLL	645	#if EV_USE_EPOLL
626	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
627	#endif	647	#endif
628	#if EV_USEV_POLL	648	#if EV_USE_POLL
629	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
630	#endif	650	#endif
631	#if EV_USE_SELECT	651	#if EV_USE_SELECT
632	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
633	#endif	653	#endif
		654	}
		655	}
634		656
		657	void
		658	loop_destroy (EV_P)
		659	{
		660	int i;
		661
		662	#if EV_USE_WIN32
		663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		664	#endif
		665	#if EV_USE_KQUEUE
		666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		667	#endif
		668	#if EV_USE_EPOLL
		669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		670	#endif
		671	#if EV_USE_POLL
		672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		673	#endif
		674	#if EV_USE_SELECT
		675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		676	#endif
		677
		678	for (i = NUMPRI; i--; )
		679	array_free (pending, [i]);
		680
		681	array_free (fdchange, );
		682	array_free (timer, );
		683	array_free (periodic, );
		684	array_free (idle, );
		685	array_free (prepare, );
		686	array_free (check, );
		687
		688	method = 0;
		689	/TODO/
		690	}
		691
		692	void
		693	loop_fork (EV_P)
		694	{
		695	/TODO/
		696	#if EV_USE_EPOLL
		697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		698	#endif
		699	#if EV_USE_KQUEUE
		700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		701	#endif
		702	}
		703
		704	#if EV_MULTIPLICITY
		705	struct ev_loop *
		706	ev_loop_new (int methods)
		707	{
		708	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		709
		710	loop_init (EV_A_ methods);
		711
		712	if (ev_method (EV_A))
		713	return loop;
		714
		715	return 0;
		716	}
		717
		718	void
		719	ev_loop_destroy (EV_P)
		720	{
		721	loop_destroy (EV_A);
		722	free (loop);
		723	}
		724
		725	void
		726	ev_loop_fork (EV_P)
		727	{
		728	loop_fork (EV_A);
		729	}
		730
		731	#endif
		732
		733	#if EV_MULTIPLICITY
		734	struct ev_loop default_loop_struct;
		735	static struct ev_loop *default_loop;
		736
		737	struct ev_loop *
		738	#else
		739	static int default_loop;
		740
		741	int
		742	#endif
		743	ev_default_loop (int methods)
		744	{
		745	if (sigpipe [0] == sigpipe [1])
		746	if (pipe (sigpipe))
		747	return 0;
		748
		749	if (!default_loop)
		750	{
		751	#if EV_MULTIPLICITY
		752	struct ev_loop *loop = default_loop = &default_loop_struct;
		753	#else
		754	default_loop = 1;
		755	#endif
		756
		757	loop_init (EV_A_ methods);
		758
635	if (method)	759	if (ev_method (EV_A))
636	{	760	{
637	ev_watcher_init (&sigev, sigcb);	761	ev_watcher_init (&sigev, sigcb);
638	ev_set_priority (&sigev, EV_MAXPRI);	762	ev_set_priority (&sigev, EV_MAXPRI);
639	siginit (EV_A);	763	siginit (EV_A);
640		764
…		…
643	ev_set_priority (&childev, EV_MAXPRI);	767	ev_set_priority (&childev, EV_MAXPRI);
644	ev_signal_start (EV_A_ &childev);	768	ev_signal_start (EV_A_ &childev);
645	ev_unref (EV_A); /* child watcher should not keep loop alive */	769	ev_unref (EV_A); /* child watcher should not keep loop alive */
646	#endif	770	#endif
647	}	771	}
		772	else
		773	default_loop = 0;
648	}	774	}
649		775
650	return method;	776	return default_loop;
651	}	777	}
652		778
653	/*****************************************************************************/
654
655	void	779	void
656	ev_fork_prepare (void)	780	ev_default_destroy (void)
657	{	781	{
658	/* nop */	782	#if EV_MULTIPLICITY
659	}	783	struct ev_loop *loop = default_loop;
660
661	void
662	ev_fork_parent (void)
663	{
664	/* nop */
665	}
666
667	void
668	ev_fork_child (void)
669	{
670	#if EV_USE_EPOLL
671	if (method == EVMETHOD_EPOLL)
672	epoll_postfork_child ();
673	#endif	784	#endif
674		785
		786	ev_ref (EV_A); /* child watcher */
		787	ev_signal_stop (EV_A_ &childev);
		788
		789	ev_ref (EV_A); /* signal watcher */
675	ev_io_stop (&sigev);	790	ev_io_stop (EV_A_ &sigev);
		791
		792	close (sigpipe [0]); sigpipe [0] = 0;
		793	close (sigpipe [1]); sigpipe [1] = 0;
		794
		795	loop_destroy (EV_A);
		796	}
		797
		798	void
		799	ev_default_fork (void)
		800	{
		801	#if EV_MULTIPLICITY
		802	struct ev_loop *loop = default_loop;
		803	#endif
		804
		805	loop_fork (EV_A);
		806
		807	ev_io_stop (EV_A_ &sigev);
676	close (sigpipe [0]);	808	close (sigpipe [0]);
677	close (sigpipe [1]);	809	close (sigpipe [1]);
678	pipe (sigpipe);	810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
679	siginit ();	813	siginit (EV_A);
680	}	814	}
681		815
682	/*****************************************************************************/	816	/*****************************************************************************/
683		817
684	static void	818	static void
…		…
700	}	834	}
701		835
702	static void	836	static void
703	timers_reify (EV_P)	837	timers_reify (EV_P)
704	{	838	{
705	while (timercnt && timers [0]->at <= mn_now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
706	{	840	{
707	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
		842
		843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
708		844
709	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
710	if (w->repeat)	846	if (w->repeat)
711	{	847	{
712	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
713	w->at = mn_now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
714	downheap ((WT *)timers, timercnt, 0);	850	downheap ((WT *)timers, timercnt, 0);
715	}	851	}
716	else	852	else
717	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
718		854
719	event ((W)w, EV_TIMEOUT);	855	event (EV_A_ (W)w, EV_TIMEOUT);
720	}	856	}
721	}	857	}
722		858
723	static void	859	static void
724	periodics_reify (EV_P)	860	periodics_reify (EV_P)
725	{	861	{
726	while (periodiccnt && periodics [0]->at <= rt_now)	862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
727	{	863	{
728	struct ev_periodic *w = periodics [0];	864	struct ev_periodic *w = periodics [0];
		865
		866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
729		867
730	/* first reschedule or stop timer */	868	/* first reschedule or stop timer */
731	if (w->interval)	869	if (w->interval)
732	{	870	{
733	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
734	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));	872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
735	downheap ((WT *)periodics, periodiccnt, 0);	873	downheap ((WT *)periodics, periodiccnt, 0);
736	}	874	}
737	else	875	else
738	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
739		877
740	event (EV_A_ (W)w, EV_PERIODIC);	878	event (EV_A_ (W)w, EV_PERIODIC);
741	}	879	}
742	}	880	}
743		881
744	static void	882	static void
745	periodics_reschedule (EV_P_ ev_tstamp diff)	883	periodics_reschedule (EV_P)
746	{	884	{
747	int i;	885	int i;
748		886
749	/* adjust periodics after time jump */	887	/* adjust periodics after time jump */
750	for (i = 0; i < periodiccnt; ++i)	888	for (i = 0; i < periodiccnt; ++i)
751	{	889	{
752	struct ev_periodic *w = periodics [i];	890	struct ev_periodic *w = periodics [i];
753		891
754	if (w->interval)	892	if (w->interval)
755	{	893	{
756	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;	894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
757		895
758	if (fabs (diff) >= 1e-4)	896	if (fabs (diff) >= 1e-4)
759	{	897	{
760	ev_periodic_stop (EV_A_ w);	898	ev_periodic_stop (EV_A_ w);
761	ev_periodic_start (EV_A_ w);	899	ev_periodic_start (EV_A_ w);
…		…
771	{	909	{
772	mn_now = get_clock ();	910	mn_now = get_clock ();
773		911
774	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
775	{	913	{
776	rt_now = mn_now + diff;	914	rt_now = rtmn_diff + mn_now;
777	return 0;	915	return 0;
778	}	916	}
779	else	917	else
780	{	918	{
781	now_floor = mn_now;	919	now_floor = mn_now;
…		…
792	#if EV_USE_MONOTONIC	930	#if EV_USE_MONOTONIC
793	if (expect_true (have_monotonic))	931	if (expect_true (have_monotonic))
794	{	932	{
795	if (time_update_monotonic (EV_A))	933	if (time_update_monotonic (EV_A))
796	{	934	{
797	ev_tstamp odiff = diff;	935	ev_tstamp odiff = rtmn_diff;
798		936
799	for (i = 4; --i; ) /* loop a few times, before making important decisions */	937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
800	{	938	{
801	diff = rt_now - mn_now;	939	rtmn_diff = rt_now - mn_now;
802		940
803	if (fabs (odiff - diff) < MIN_TIMEJUMP)	941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
804	return; /* all is well */	942	return; /* all is well */
805		943
806	rt_now = ev_time ();	944	rt_now = ev_time ();
807	mn_now = get_clock ();	945	mn_now = get_clock ();
808	now_floor = mn_now;	946	now_floor = mn_now;
809	}	947	}
810		948
811	periodics_reschedule (EV_A_ diff - odiff);	949	periodics_reschedule (EV_A);
812	/* no timer adjustment, as the monotonic clock doesn't jump */	950	/* no timer adjustment, as the monotonic clock doesn't jump */
		951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
813	}	952	}
814	}	953	}
815	else	954	else
816	#endif	955	#endif
817	{	956	{
818	rt_now = ev_time ();	957	rt_now = ev_time ();
819		958
820	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	959	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
821	{	960	{
822	periodics_reschedule (EV_A_ rt_now - mn_now);	961	periodics_reschedule (EV_A);
823		962
824	/* adjust timers. this is easy, as the offset is the same for all */	963	/* adjust timers. this is easy, as the offset is the same for all */
825	for (i = 0; i < timercnt; ++i)	964	for (i = 0; i < timercnt; ++i)
826	timers [i]->at += diff;	965	((WT)timers [i])->at += rt_now - mn_now;
827	}	966	}
828		967
829	mn_now = rt_now;	968	mn_now = rt_now;
830	}	969	}
831	}	970	}
…		…
882	{	1021	{
883	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
884		1023
885	if (timercnt)	1024	if (timercnt)
886	{	1025	{
887	ev_tstamp to = timers [0]->at - mn_now + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
888	if (block > to) block = to;	1027	if (block > to) block = to;
889	}	1028	}
890		1029
891	if (periodiccnt)	1030	if (periodiccnt)
892	{	1031	{
893	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
894	if (block > to) block = to;	1033	if (block > to) block = to;
895	}	1034	}
896		1035
897	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
898	}	1037	}
…		…
1015	ev_timer_start (EV_P_ struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
1016	{	1155	{
1017	if (ev_is_active (w))	1156	if (ev_is_active (w))
1018	return;	1157	return;
1019		1158
1020	w->at += mn_now;	1159	((WT)w)->at += mn_now;
1021		1160
1022	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1023		1162
1024	ev_start (EV_A_ (W)w, ++timercnt);	1163	ev_start (EV_A_ (W)w, ++timercnt);
1025	array_needsize (timers, timermax, timercnt, );	1164	array_needsize (timers, timermax, timercnt, );
1026	timers [timercnt - 1] = w;	1165	timers [timercnt - 1] = w;
1027	upheap ((WT *)timers, timercnt - 1);	1166	upheap ((WT *)timers, timercnt - 1);
		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1028	}	1169	}
1029		1170
1030	void	1171	void
1031	ev_timer_stop (EV_P_ struct ev_timer *w)	1172	ev_timer_stop (EV_P_ struct ev_timer *w)
1032	{	1173	{
1033	ev_clear_pending (EV_A_ (W)w);	1174	ev_clear_pending (EV_A_ (W)w);
1034	if (!ev_is_active (w))	1175	if (!ev_is_active (w))
1035	return;	1176	return;
1036		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
1037	if (w->active < timercnt--)	1180	if (((W)w)->active < timercnt--)
1038	{	1181	{
1039	timers [w->active - 1] = timers [timercnt];	1182	timers [((W)w)->active - 1] = timers [timercnt];
1040	downheap ((WT *)timers, timercnt, w->active - 1);	1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1041	}	1184	}
1042		1185
1043	w->at = w->repeat;	1186	((WT)w)->at = w->repeat;
1044		1187
1045	ev_stop (EV_A_ (W)w);	1188	ev_stop (EV_A_ (W)w);
1046	}	1189	}
1047		1190
1048	void	1191	void
…		…
1050	{	1193	{
1051	if (ev_is_active (w))	1194	if (ev_is_active (w))
1052	{	1195	{
1053	if (w->repeat)	1196	if (w->repeat)
1054	{	1197	{
1055	w->at = mn_now + w->repeat;	1198	((WT)w)->at = mn_now + w->repeat;
1056	downheap ((WT *)timers, timercnt, w->active - 1);	1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1057	}	1200	}
1058	else	1201	else
1059	ev_timer_stop (EV_A_ w);	1202	ev_timer_stop (EV_A_ w);
1060	}	1203	}
1061	else if (w->repeat)	1204	else if (w->repeat)
…		…
1070		1213
1071	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1072		1215
1073	/* this formula differs from the one in periodic_reify because we do not always round up */	1216	/* this formula differs from the one in periodic_reify because we do not always round up */
1074	if (w->interval)	1217	if (w->interval)
1075	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;	1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1076		1219
1077	ev_start (EV_A_ (W)w, ++periodiccnt);	1220	ev_start (EV_A_ (W)w, ++periodiccnt);
1078	array_needsize (periodics, periodicmax, periodiccnt, );	1221	array_needsize (periodics, periodicmax, periodiccnt, );
1079	periodics [periodiccnt - 1] = w;	1222	periodics [periodiccnt - 1] = w;
1080	upheap ((WT *)periodics, periodiccnt - 1);	1223	upheap ((WT *)periodics, periodiccnt - 1);
		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1081	}	1226	}
1082		1227
1083	void	1228	void
1084	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
1085	{	1230	{
1086	ev_clear_pending (EV_A_ (W)w);	1231	ev_clear_pending (EV_A_ (W)w);
1087	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
1088	return;	1233	return;
1089		1234
		1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1236
1090	if (w->active < periodiccnt--)	1237	if (((W)w)->active < periodiccnt--)
1091	{	1238	{
1092	periodics [w->active - 1] = periodics [periodiccnt];	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1093	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1094	}	1241	}
1095		1242
		1243	ev_stop (EV_A_ (W)w);
		1244	}
		1245
		1246	void
		1247	ev_idle_start (EV_P_ struct ev_idle *w)
		1248	{
		1249	if (ev_is_active (w))
		1250	return;
		1251
		1252	ev_start (EV_A_ (W)w, ++idlecnt);
		1253	array_needsize (idles, idlemax, idlecnt, );
		1254	idles [idlecnt - 1] = w;
		1255	}
		1256
		1257	void
		1258	ev_idle_stop (EV_P_ struct ev_idle *w)
		1259	{
		1260	ev_clear_pending (EV_A_ (W)w);
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	idles [((W)w)->active - 1] = idles [--idlecnt];
		1265	ev_stop (EV_A_ (W)w);
		1266	}
		1267
		1268	void
		1269	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1270	{
		1271	if (ev_is_active (w))
		1272	return;
		1273
		1274	ev_start (EV_A_ (W)w, ++preparecnt);
		1275	array_needsize (prepares, preparemax, preparecnt, );
		1276	prepares [preparecnt - 1] = w;
		1277	}
		1278
		1279	void
		1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1281	{
		1282	ev_clear_pending (EV_A_ (W)w);
		1283	if (ev_is_active (w))
		1284	return;
		1285
		1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1287	ev_stop (EV_A_ (W)w);
		1288	}
		1289
		1290	void
		1291	ev_check_start (EV_P_ struct ev_check *w)
		1292	{
		1293	if (ev_is_active (w))
		1294	return;
		1295
		1296	ev_start (EV_A_ (W)w, ++checkcnt);
		1297	array_needsize (checks, checkmax, checkcnt, );
		1298	checks [checkcnt - 1] = w;
		1299	}
		1300
		1301	void
		1302	ev_check_stop (EV_P_ struct ev_check *w)
		1303	{
		1304	ev_clear_pending (EV_A_ (W)w);
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	checks [((W)w)->active - 1] = checks [--checkcnt];
1096	ev_stop (EV_A_ (W)w);	1309	ev_stop (EV_A_ (W)w);
1097	}	1310	}
1098		1311
1099	#ifndef SA_RESTART	1312	#ifndef SA_RESTART
1100	# define SA_RESTART 0	1313	# define SA_RESTART 0
1101	#endif	1314	#endif
1102		1315
1103	void	1316	void
1104	ev_signal_start (EV_P_ struct ev_signal *w)	1317	ev_signal_start (EV_P_ struct ev_signal *w)
1105	{	1318	{
		1319	#if EV_MULTIPLICITY
		1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1321	#endif
1106	if (ev_is_active (w))	1322	if (ev_is_active (w))
1107	return;	1323	return;
1108		1324
1109	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1110		1326
1111	ev_start (EV_A_ (W)w, 1);	1327	ev_start (EV_A_ (W)w, 1);
1112	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
1113	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1114		1330
1115	if (!w->next)	1331	if (!((WL)w)->next)
1116	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
1117	struct sigaction sa;	1336	struct sigaction sa;
1118	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
1119	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
1120	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1121	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
1122	}	1342	}
1123	}	1343	}
1124		1344
1125	void	1345	void
1126	ev_signal_stop (EV_P_ struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
…		…
1135	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
1136	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
1137	}	1357	}
1138		1358
1139	void	1359	void
1140	ev_idle_start (EV_P_ struct ev_idle *w)
1141	{
1142	if (ev_is_active (w))
1143	return;
1144
1145	ev_start (EV_A_ (W)w, ++idlecnt);
1146	array_needsize (idles, idlemax, idlecnt, );
1147	idles [idlecnt - 1] = w;
1148	}
1149
1150	void
1151	ev_idle_stop (EV_P_ struct ev_idle *w)
1152	{
1153	ev_clear_pending (EV_A_ (W)w);
1154	if (ev_is_active (w))
1155	return;
1156
1157	idles [w->active - 1] = idles [--idlecnt];
1158	ev_stop (EV_A_ (W)w);
1159	}
1160
1161	void
1162	ev_prepare_start (EV_P_ struct ev_prepare *w)
1163	{
1164	if (ev_is_active (w))
1165	return;
1166
1167	ev_start (EV_A_ (W)w, ++preparecnt);
1168	array_needsize (prepares, preparemax, preparecnt, );
1169	prepares [preparecnt - 1] = w;
1170	}
1171
1172	void
1173	ev_prepare_stop (EV_P_ struct ev_prepare *w)
1174	{
1175	ev_clear_pending (EV_A_ (W)w);
1176	if (ev_is_active (w))
1177	return;
1178
1179	prepares [w->active - 1] = prepares [--preparecnt];
1180	ev_stop (EV_A_ (W)w);
1181	}
1182
1183	void
1184	ev_check_start (EV_P_ struct ev_check *w)
1185	{
1186	if (ev_is_active (w))
1187	return;
1188
1189	ev_start (EV_A_ (W)w, ++checkcnt);
1190	array_needsize (checks, checkmax, checkcnt, );
1191	checks [checkcnt - 1] = w;
1192	}
1193
1194	void
1195	ev_check_stop (EV_P_ struct ev_check *w)
1196	{
1197	ev_clear_pending (EV_A_ (W)w);
1198	if (ev_is_active (w))
1199	return;
1200
1201	checks [w->active - 1] = checks [--checkcnt];
1202	ev_stop (EV_A_ (W)w);
1203	}
1204
1205	void
1206	ev_child_start (EV_P_ struct ev_child *w)	1360	ev_child_start (EV_P_ struct ev_child *w)
1207	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
1208	if (ev_is_active (w))	1365	if (ev_is_active (w))
1209	return;	1366	return;
1210		1367
1211	ev_start (EV_A_ (W)w, 1);	1368	ev_start (EV_A_ (W)w, 1);
1212	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
…		…
1284	ev_timer_start (EV_A_ &once->to);	1441	ev_timer_start (EV_A_ &once->to);
1285	}	1442	}
1286	}	1443	}
1287	}	1444	}
1288		1445
1289	/*****************************************************************************/
1290
1291	#if 0
1292
1293	struct ev_io wio;
1294
1295	static void
1296	sin_cb (struct ev_io *w, int revents)
1297	{
1298	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1299	}
1300
1301	static void
1302	ocb (struct ev_timer *w, int revents)
1303	{
1304	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1305	ev_timer_stop (w);
1306	ev_timer_start (w);
1307	}
1308
1309	static void
1310	scb (struct ev_signal *w, int revents)
1311	{
1312	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1313	ev_io_stop (&wio);
1314	ev_io_start (&wio);
1315	}
1316
1317	static void
1318	gcb (struct ev_signal *w, int revents)
1319	{
1320	fprintf (stderr, "generic %x\n", revents);
1321
1322	}
1323
1324	int main (void)
1325	{
1326	ev_init (0);
1327
1328	ev_io_init (&wio, sin_cb, 0, EV_READ);
1329	ev_io_start (&wio);
1330
1331	struct ev_timer t[10000];
1332
1333	#if 0
1334	int i;
1335	for (i = 0; i < 10000; ++i)
1336	{
1337	struct ev_timer *w = t + i;
1338	ev_watcher_init (w, ocb, i);
1339	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1340	ev_timer_start (w);
1341	if (drand48 () < 0.5)
1342	ev_timer_stop (w);
1343	}
1344	#endif
1345
1346	struct ev_timer t1;
1347	ev_timer_init (&t1, ocb, 5, 10);
1348	ev_timer_start (&t1);
1349
1350	struct ev_signal sig;
1351	ev_signal_init (&sig, scb, SIGQUIT);
1352	ev_signal_start (&sig);
1353
1354	struct ev_check cw;
1355	ev_check_init (&cw, gcb);
1356	ev_check_start (&cw);
1357
1358	struct ev_idle iw;
1359	ev_idle_init (&iw, gcb);
1360	ev_idle_start (&iw);
1361
1362	ev_loop (0);
1363
1364	return 0;
1365	}
1366
1367	#endif
1368
1369
1370
1371

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC vs. Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC