[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 1.68 by root, Mon Nov 5 20:19:00 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	WL 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);
364	fd_kill (EV_A_ fd);	381	fd_kill (EV_A_ fd);
365	return;	382	return;
366	}	383	}
367	}	384	}
368		385
		386	/* susually called after fork if method needs to re-arm all fds from scratch */
		387	static void
		388	fd_rearm_all (EV_P)
		389	{
		390	int fd;
		391
		392	/* this should be highly optimised to not do anything but set a flag */
		393	for (fd = 0; fd < anfdmax; ++fd)
		394	if (anfds [fd].events)
		395	{
		396	anfds [fd].events = 0;
		397	fd_change (EV_A_ fd);
		398	}
		399	}
		400
369	/*****************************************************************************/	401	/*****************************************************************************/
370		402
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	403	static void
378	upheap (WT *timers, int k)	404	upheap (WT *heap, int k)
379	{	405	{
380	WT w = timers [k];	406	WT w = heap [k];
381		407
382	while (k && timers [k >> 1]->at > w->at)	408	while (k && heap [k >> 1]->at > w->at)
383	{	409	{
384	timers [k] = timers [k >> 1];	410	heap [k] = heap [k >> 1];
385	timers [k]->active = k + 1;	411	((W)heap [k])->active = k + 1;
386	k >>= 1;	412	k >>= 1;
387	}	413	}
388		414
389	timers [k] = w;	415	heap [k] = w;
390	timers [k]->active = k + 1;	416	((W)heap [k])->active = k + 1;
391		417
392	}	418	}
393		419
394	static void	420	static void
395	downheap (WT *timers, int N, int k)	421	downheap (WT *heap, int N, int k)
396	{	422	{
397	WT w = timers [k];	423	WT w = heap [k];
398		424
399	while (k < (N >> 1))	425	while (k < (N >> 1))
400	{	426	{
401	int j = k << 1;	427	int j = k << 1;
402		428
403	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
404	++j;	430	++j;
405		431
406	if (w->at <= timers [j]->at)	432	if (w->at <= heap [j]->at)
407	break;	433	break;
408		434
409	timers [k] = timers [j];	435	heap [k] = heap [j];
410	timers [k]->active = k + 1;	436	((W)heap [k])->active = k + 1;
411	k = j;	437	k = j;
412	}	438	}
413		439
414	timers [k] = w;	440	heap [k] = w;
415	timers [k]->active = k + 1;	441	((W)heap [k])->active = k + 1;
416	}	442	}
417		443
418	/*****************************************************************************/	444	/*****************************************************************************/
419		445
420	typedef struct	446	typedef struct
421	{	447	{
422	struct ev_watcher_list *head;	448	WL head;
423	sig_atomic_t volatile gotsig;	449	sig_atomic_t volatile gotsig;
424	} ANSIG;	450	} ANSIG;
425		451
426	static ANSIG *signals;	452	static ANSIG *signals;
427	static int signalmax;	453	static int signalmax;
…		…
443	}	469	}
444		470
445	static void	471	static void
446	sighandler (int signum)	472	sighandler (int signum)
447	{	473	{
		474	#if WIN32
		475	signal (signum, sighandler);
		476	#endif
		477
448	signals [signum - 1].gotsig = 1;	478	signals [signum - 1].gotsig = 1;
449		479
450	if (!gotsig)	480	if (!gotsig)
451	{	481	{
452	int old_errno = errno;	482	int old_errno = errno;
…		…
457	}	487	}
458		488
459	static void	489	static void
460	sigcb (EV_P_ struct ev_io *iow, int revents)	490	sigcb (EV_P_ struct ev_io *iow, int revents)
461	{	491	{
462	struct ev_watcher_list *w;	492	WL w;
463	int signum;	493	int signum;
464		494
465	read (sigpipe [0], &revents, 1);	495	read (sigpipe [0], &revents, 1);
466	gotsig = 0;	496	gotsig = 0;
467		497
…		…
486	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
487	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
488	#endif	518	#endif
489		519
490	ev_io_set (&sigev, sigpipe [0], EV_READ);	520	ev_io_set (&sigev, sigpipe [0], EV_READ);
491	ev_io_start (&sigev);	521	ev_io_start (EV_A_ &sigev);
492	ev_unref (EV_A); /* child watcher should not keep loop alive */	522	ev_unref (EV_A); /* child watcher should not keep loop alive */
493	}	523	}
494		524
495	/*****************************************************************************/	525	/*****************************************************************************/
496		526
497	static struct ev_idle **idles;	527	#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		528
508	static struct ev_child *childs [PID_HASHSIZE];	529	static struct ev_child *childs [PID_HASHSIZE];
509	static struct ev_signal childev;	530	static struct ev_signal childev;
510
511	#ifndef WIN32
512		531
513	#ifndef WCONTINUED	532	#ifndef WCONTINUED
514	# define WCONTINUED 0	533	# define WCONTINUED 0
515	#endif	534	#endif
516		535
…		…
520	struct ev_child *w;	539	struct ev_child *w;
521		540
522	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)	541	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)	542	if (w->pid == pid \|\| !w->pid)
524	{	543	{
525	w->priority = sw->priority; /* need to do it now */	544	ev_priority (w) = ev_priority (sw); /* need to do it now */
526	w->rpid = pid;	545	w->rpid = pid;
527	w->rstatus = status;	546	w->rstatus = status;
528	event (EV_A_ (W)w, EV_CHILD);	547	event (EV_A_ (W)w, EV_CHILD);
529	}	548	}
530	}	549	}
531		550
532	static void	551	static void
…		…
552	# include "ev_kqueue.c"	571	# include "ev_kqueue.c"
553	#endif	572	#endif
554	#if EV_USE_EPOLL	573	#if EV_USE_EPOLL
555	# include "ev_epoll.c"	574	# include "ev_epoll.c"
556	#endif	575	#endif
557	#if EV_USEV_POLL	576	#if EV_USE_POLL
558	# include "ev_poll.c"	577	# include "ev_poll.c"
559	#endif	578	#endif
560	#if EV_USE_SELECT	579	#if EV_USE_SELECT
561	# include "ev_select.c"	580	# include "ev_select.c"
562	#endif	581	#endif
…		…
589	ev_method (EV_P)	608	ev_method (EV_P)
590	{	609	{
591	return method;	610	return method;
592	}	611	}
593		612
594	int	613	static void
595	ev_init (EV_P_ int methods)	614	loop_init (EV_P_ int methods)
596	{	615	{
597	if (!method)	616	if (!method)
598	{	617	{
599	#if EV_USE_MONOTONIC	618	#if EV_USE_MONOTONIC
600	{	619	{
…		…
605	#endif	624	#endif
606		625
607	rt_now = ev_time ();	626	rt_now = ev_time ();
608	mn_now = get_clock ();	627	mn_now = get_clock ();
609	now_floor = mn_now;	628	now_floor = mn_now;
610	diff = rt_now - mn_now;	629	rtmn_diff = rt_now - mn_now;
611
612	if (pipe (sigpipe))
613	return 0;
614		630
615	if (methods == EVMETHOD_AUTO)	631	if (methods == EVMETHOD_AUTO)
616	if (!enable_secure () && getenv ("LIBmethodS"))	632	if (!enable_secure () && getenv ("LIBEV_METHODS"))
617	methods = atoi (getenv ("LIBmethodS"));	633	methods = atoi (getenv ("LIBEV_METHODS"));
618	else	634	else
619	methods = EVMETHOD_ANY;	635	methods = EVMETHOD_ANY;
620		636
621	method = 0;	637	method = 0;
		638	#if EV_USE_WIN32
		639	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		640	#endif
622	#if EV_USE_KQUEUE	641	#if EV_USE_KQUEUE
623	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);	642	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
624	#endif	643	#endif
625	#if EV_USE_EPOLL	644	#if EV_USE_EPOLL
626	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);	645	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
627	#endif	646	#endif
628	#if EV_USEV_POLL	647	#if EV_USE_POLL
629	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);	648	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
630	#endif	649	#endif
631	#if EV_USE_SELECT	650	#if EV_USE_SELECT
632	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);	651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
633	#endif	652	#endif
		653	}
		654	}
634		655
		656	void
		657	loop_destroy (EV_P)
		658	{
		659	int i;
		660
		661	#if EV_USE_WIN32
		662	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		663	#endif
		664	#if EV_USE_KQUEUE
		665	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		666	#endif
		667	#if EV_USE_EPOLL
		668	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		669	#endif
		670	#if EV_USE_POLL
		671	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		672	#endif
		673	#if EV_USE_SELECT
		674	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		675	#endif
		676
		677	for (i = NUMPRI; i--; )
		678	array_free (pending, [i]);
		679
		680	array_free (fdchange, );
		681	array_free (timer, );
		682	array_free (periodic, );
		683	array_free (idle, );
		684	array_free (prepare, );
		685	array_free (check, );
		686
		687	method = 0;
		688	/TODO/
		689	}
		690
		691	void
		692	loop_fork (EV_P)
		693	{
		694	/TODO/
		695	#if EV_USE_EPOLL
		696	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		697	#endif
		698	#if EV_USE_KQUEUE
		699	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		700	#endif
		701	}
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop *
		705	ev_loop_new (int methods)
		706	{
		707	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		708
		709	loop_init (EV_A_ methods);
		710
		711	if (ev_method (EV_A))
		712	return loop;
		713
		714	return 0;
		715	}
		716
		717	void
		718	ev_loop_destroy (EV_P)
		719	{
		720	loop_destroy (EV_A);
		721	free (loop);
		722	}
		723
		724	void
		725	ev_loop_fork (EV_P)
		726	{
		727	loop_fork (EV_A);
		728	}
		729
		730	#endif
		731
		732	#if EV_MULTIPLICITY
		733	struct ev_loop default_loop_struct;
		734	static struct ev_loop *default_loop;
		735
		736	struct ev_loop *
		737	#else
		738	static int default_loop;
		739
		740	int
		741	#endif
		742	ev_default_loop (int methods)
		743	{
		744	if (sigpipe [0] == sigpipe [1])
		745	if (pipe (sigpipe))
		746	return 0;
		747
		748	if (!default_loop)
		749	{
		750	#if EV_MULTIPLICITY
		751	struct ev_loop *loop = default_loop = &default_loop_struct;
		752	#else
		753	default_loop = 1;
		754	#endif
		755
		756	loop_init (EV_A_ methods);
		757
635	if (method)	758	if (ev_method (EV_A))
636	{	759	{
637	ev_watcher_init (&sigev, sigcb);	760	ev_watcher_init (&sigev, sigcb);
638	ev_set_priority (&sigev, EV_MAXPRI);	761	ev_set_priority (&sigev, EV_MAXPRI);
639	siginit (EV_A);	762	siginit (EV_A);
640		763
…		…
643	ev_set_priority (&childev, EV_MAXPRI);	766	ev_set_priority (&childev, EV_MAXPRI);
644	ev_signal_start (EV_A_ &childev);	767	ev_signal_start (EV_A_ &childev);
645	ev_unref (EV_A); /* child watcher should not keep loop alive */	768	ev_unref (EV_A); /* child watcher should not keep loop alive */
646	#endif	769	#endif
647	}	770	}
		771	else
		772	default_loop = 0;
648	}	773	}
649		774
650	return method;	775	return default_loop;
651	}	776	}
652		777
653	/*****************************************************************************/
654
655	void	778	void
656	ev_fork_prepare (void)	779	ev_default_destroy (void)
657	{	780	{
658	/* nop */	781	#if EV_MULTIPLICITY
659	}	782	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	783	#endif
674		784
		785	ev_ref (EV_A); /* child watcher */
		786	ev_signal_stop (EV_A_ &childev);
		787
		788	ev_ref (EV_A); /* signal watcher */
675	ev_io_stop (&sigev);	789	ev_io_stop (EV_A_ &sigev);
		790
		791	close (sigpipe [0]); sigpipe [0] = 0;
		792	close (sigpipe [1]); sigpipe [1] = 0;
		793
		794	loop_destroy (EV_A);
		795	}
		796
		797	void
		798	ev_default_fork (void)
		799	{
		800	#if EV_MULTIPLICITY
		801	struct ev_loop *loop = default_loop;
		802	#endif
		803
		804	loop_fork (EV_A);
		805
		806	ev_io_stop (EV_A_ &sigev);
676	close (sigpipe [0]);	807	close (sigpipe [0]);
677	close (sigpipe [1]);	808	close (sigpipe [1]);
678	pipe (sigpipe);	809	pipe (sigpipe);
		810
		811	ev_ref (EV_A); /* signal watcher */
679	siginit ();	812	siginit (EV_A);
680	}	813	}
681		814
682	/*****************************************************************************/	815	/*****************************************************************************/
683		816
684	static void	817	static void
…		…
700	}	833	}
701		834
702	static void	835	static void
703	timers_reify (EV_P)	836	timers_reify (EV_P)
704	{	837	{
705	while (timercnt && timers [0]->at <= mn_now)	838	while (timercnt && ((WT)timers [0])->at <= mn_now)
706	{	839	{
707	struct ev_timer *w = timers [0];	840	struct ev_timer *w = timers [0];
		841
		842	assert (("inactive timer on timer heap detected", ev_is_active (w)));
708		843
709	/* first reschedule or stop timer */	844	/* first reschedule or stop timer */
710	if (w->repeat)	845	if (w->repeat)
711	{	846	{
712	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
713	w->at = mn_now + w->repeat;	848	((WT)w)->at = mn_now + w->repeat;
714	downheap ((WT *)timers, timercnt, 0);	849	downheap ((WT *)timers, timercnt, 0);
715	}	850	}
716	else	851	else
717	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
718		853
719	event ((W)w, EV_TIMEOUT);	854	event (EV_A_ (W)w, EV_TIMEOUT);
720	}	855	}
721	}	856	}
722		857
723	static void	858	static void
724	periodics_reify (EV_P)	859	periodics_reify (EV_P)
725	{	860	{
726	while (periodiccnt && periodics [0]->at <= rt_now)	861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
727	{	862	{
728	struct ev_periodic *w = periodics [0];	863	struct ev_periodic *w = periodics [0];
		864
		865	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
729		866
730	/* first reschedule or stop timer */	867	/* first reschedule or stop timer */
731	if (w->interval)	868	if (w->interval)
732	{	869	{
733	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;	870	((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));	871	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
735	downheap ((WT *)periodics, periodiccnt, 0);	872	downheap ((WT *)periodics, periodiccnt, 0);
736	}	873	}
737	else	874	else
738	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
739		876
740	event (EV_A_ (W)w, EV_PERIODIC);	877	event (EV_A_ (W)w, EV_PERIODIC);
741	}	878	}
742	}	879	}
743		880
744	static void	881	static void
745	periodics_reschedule (EV_P_ ev_tstamp diff)	882	periodics_reschedule (EV_P)
746	{	883	{
747	int i;	884	int i;
748		885
749	/* adjust periodics after time jump */	886	/* adjust periodics after time jump */
750	for (i = 0; i < periodiccnt; ++i)	887	for (i = 0; i < periodiccnt; ++i)
751	{	888	{
752	struct ev_periodic *w = periodics [i];	889	struct ev_periodic *w = periodics [i];
753		890
754	if (w->interval)	891	if (w->interval)
755	{	892	{
756	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;	893	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
757		894
758	if (fabs (diff) >= 1e-4)	895	if (fabs (diff) >= 1e-4)
759	{	896	{
760	ev_periodic_stop (EV_A_ w);	897	ev_periodic_stop (EV_A_ w);
761	ev_periodic_start (EV_A_ w);	898	ev_periodic_start (EV_A_ w);
…		…
771	{	908	{
772	mn_now = get_clock ();	909	mn_now = get_clock ();
773		910
774	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	911	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
775	{	912	{
776	rt_now = mn_now + diff;	913	rt_now = rtmn_diff + mn_now;
777	return 0;	914	return 0;
778	}	915	}
779	else	916	else
780	{	917	{
781	now_floor = mn_now;	918	now_floor = mn_now;
…		…
792	#if EV_USE_MONOTONIC	929	#if EV_USE_MONOTONIC
793	if (expect_true (have_monotonic))	930	if (expect_true (have_monotonic))
794	{	931	{
795	if (time_update_monotonic (EV_A))	932	if (time_update_monotonic (EV_A))
796	{	933	{
797	ev_tstamp odiff = diff;	934	ev_tstamp odiff = rtmn_diff;
798		935
799	for (i = 4; --i; ) /* loop a few times, before making important decisions */	936	for (i = 4; --i; ) /* loop a few times, before making important decisions */
800	{	937	{
801	diff = rt_now - mn_now;	938	rtmn_diff = rt_now - mn_now;
802		939
803	if (fabs (odiff - diff) < MIN_TIMEJUMP)	940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
804	return; /* all is well */	941	return; /* all is well */
805		942
806	rt_now = ev_time ();	943	rt_now = ev_time ();
807	mn_now = get_clock ();	944	mn_now = get_clock ();
808	now_floor = mn_now;	945	now_floor = mn_now;
809	}	946	}
810		947
811	periodics_reschedule (EV_A_ diff - odiff);	948	periodics_reschedule (EV_A);
812	/* no timer adjustment, as the monotonic clock doesn't jump */	949	/* no timer adjustment, as the monotonic clock doesn't jump */
		950	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
813	}	951	}
814	}	952	}
815	else	953	else
816	#endif	954	#endif
817	{	955	{
818	rt_now = ev_time ();	956	rt_now = ev_time ();
819		957
820	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	958	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
821	{	959	{
822	periodics_reschedule (EV_A_ rt_now - mn_now);	960	periodics_reschedule (EV_A);
823		961
824	/* adjust timers. this is easy, as the offset is the same for all */	962	/* adjust timers. this is easy, as the offset is the same for all */
825	for (i = 0; i < timercnt; ++i)	963	for (i = 0; i < timercnt; ++i)
826	timers [i]->at += diff;	964	((WT)timers [i])->at += rt_now - mn_now;
827	}	965	}
828		966
829	mn_now = rt_now;	967	mn_now = rt_now;
830	}	968	}
831	}	969	}
…		…
882	{	1020	{
883	block = MAX_BLOCKTIME;	1021	block = MAX_BLOCKTIME;
884		1022
885	if (timercnt)	1023	if (timercnt)
886	{	1024	{
887	ev_tstamp to = timers [0]->at - mn_now + method_fudge;	1025	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
888	if (block > to) block = to;	1026	if (block > to) block = to;
889	}	1027	}
890		1028
891	if (periodiccnt)	1029	if (periodiccnt)
892	{	1030	{
893	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;	1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
894	if (block > to) block = to;	1032	if (block > to) block = to;
895	}	1033	}
896		1034
897	if (block < 0.) block = 0.;	1035	if (block < 0.) block = 0.;
898	}	1036	}
…		…
1015	ev_timer_start (EV_P_ struct ev_timer *w)	1153	ev_timer_start (EV_P_ struct ev_timer *w)
1016	{	1154	{
1017	if (ev_is_active (w))	1155	if (ev_is_active (w))
1018	return;	1156	return;
1019		1157
1020	w->at += mn_now;	1158	((WT)w)->at += mn_now;
1021		1159
1022	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1160	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1023		1161
1024	ev_start (EV_A_ (W)w, ++timercnt);	1162	ev_start (EV_A_ (W)w, ++timercnt);
1025	array_needsize (timers, timermax, timercnt, );	1163	array_needsize (timers, timermax, timercnt, );
1026	timers [timercnt - 1] = w;	1164	timers [timercnt - 1] = w;
1027	upheap ((WT *)timers, timercnt - 1);	1165	upheap ((WT *)timers, timercnt - 1);
		1166
		1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1028	}	1168	}
1029		1169
1030	void	1170	void
1031	ev_timer_stop (EV_P_ struct ev_timer *w)	1171	ev_timer_stop (EV_P_ struct ev_timer *w)
1032	{	1172	{
1033	ev_clear_pending (EV_A_ (W)w);	1173	ev_clear_pending (EV_A_ (W)w);
1034	if (!ev_is_active (w))	1174	if (!ev_is_active (w))
1035	return;	1175	return;
1036		1176
		1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1178
1037	if (w->active < timercnt--)	1179	if (((W)w)->active < timercnt--)
1038	{	1180	{
1039	timers [w->active - 1] = timers [timercnt];	1181	timers [((W)w)->active - 1] = timers [timercnt];
1040	downheap ((WT *)timers, timercnt, w->active - 1);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1041	}	1183	}
1042		1184
1043	w->at = w->repeat;	1185	((WT)w)->at = w->repeat;
1044		1186
1045	ev_stop (EV_A_ (W)w);	1187	ev_stop (EV_A_ (W)w);
1046	}	1188	}
1047		1189
1048	void	1190	void
…		…
1050	{	1192	{
1051	if (ev_is_active (w))	1193	if (ev_is_active (w))
1052	{	1194	{
1053	if (w->repeat)	1195	if (w->repeat)
1054	{	1196	{
1055	w->at = mn_now + w->repeat;	1197	((WT)w)->at = mn_now + w->repeat;
1056	downheap ((WT *)timers, timercnt, w->active - 1);	1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
1057	}	1199	}
1058	else	1200	else
1059	ev_timer_stop (EV_A_ w);	1201	ev_timer_stop (EV_A_ w);
1060	}	1202	}
1061	else if (w->repeat)	1203	else if (w->repeat)
…		…
1070		1212
1071	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1213	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1072		1214
1073	/* this formula differs from the one in periodic_reify because we do not always round up */	1215	/* this formula differs from the one in periodic_reify because we do not always round up */
1074	if (w->interval)	1216	if (w->interval)
1075	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;	1217	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1076		1218
1077	ev_start (EV_A_ (W)w, ++periodiccnt);	1219	ev_start (EV_A_ (W)w, ++periodiccnt);
1078	array_needsize (periodics, periodicmax, periodiccnt, );	1220	array_needsize (periodics, periodicmax, periodiccnt, );
1079	periodics [periodiccnt - 1] = w;	1221	periodics [periodiccnt - 1] = w;
1080	upheap ((WT *)periodics, periodiccnt - 1);	1222	upheap ((WT *)periodics, periodiccnt - 1);
		1223
		1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1081	}	1225	}
1082		1226
1083	void	1227	void
1084	ev_periodic_stop (EV_P_ struct ev_periodic *w)	1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)
1085	{	1229	{
1086	ev_clear_pending (EV_A_ (W)w);	1230	ev_clear_pending (EV_A_ (W)w);
1087	if (!ev_is_active (w))	1231	if (!ev_is_active (w))
1088	return;	1232	return;
1089		1233
		1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1235
1090	if (w->active < periodiccnt--)	1236	if (((W)w)->active < periodiccnt--)
1091	{	1237	{
1092	periodics [w->active - 1] = periodics [periodiccnt];	1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1093	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1094	}	1240	}
1095		1241
		1242	ev_stop (EV_A_ (W)w);
		1243	}
		1244
		1245	void
		1246	ev_idle_start (EV_P_ struct ev_idle *w)
		1247	{
		1248	if (ev_is_active (w))
		1249	return;
		1250
		1251	ev_start (EV_A_ (W)w, ++idlecnt);
		1252	array_needsize (idles, idlemax, idlecnt, );
		1253	idles [idlecnt - 1] = w;
		1254	}
		1255
		1256	void
		1257	ev_idle_stop (EV_P_ struct ev_idle *w)
		1258	{
		1259	ev_clear_pending (EV_A_ (W)w);
		1260	if (ev_is_active (w))
		1261	return;
		1262
		1263	idles [((W)w)->active - 1] = idles [--idlecnt];
		1264	ev_stop (EV_A_ (W)w);
		1265	}
		1266
		1267	void
		1268	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1269	{
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	ev_start (EV_A_ (W)w, ++preparecnt);
		1274	array_needsize (prepares, preparemax, preparecnt, );
		1275	prepares [preparecnt - 1] = w;
		1276	}
		1277
		1278	void
		1279	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1280	{
		1281	ev_clear_pending (EV_A_ (W)w);
		1282	if (ev_is_active (w))
		1283	return;
		1284
		1285	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1286	ev_stop (EV_A_ (W)w);
		1287	}
		1288
		1289	void
		1290	ev_check_start (EV_P_ struct ev_check *w)
		1291	{
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	ev_start (EV_A_ (W)w, ++checkcnt);
		1296	array_needsize (checks, checkmax, checkcnt, );
		1297	checks [checkcnt - 1] = w;
		1298	}
		1299
		1300	void
		1301	ev_check_stop (EV_P_ struct ev_check *w)
		1302	{
		1303	ev_clear_pending (EV_A_ (W)w);
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	checks [((W)w)->active - 1] = checks [--checkcnt];
1096	ev_stop (EV_A_ (W)w);	1308	ev_stop (EV_A_ (W)w);
1097	}	1309	}
1098		1310
1099	#ifndef SA_RESTART	1311	#ifndef SA_RESTART
1100	# define SA_RESTART 0	1312	# define SA_RESTART 0
1101	#endif	1313	#endif
1102		1314
1103	void	1315	void
1104	ev_signal_start (EV_P_ struct ev_signal *w)	1316	ev_signal_start (EV_P_ struct ev_signal *w)
1105	{	1317	{
		1318	#if EV_MULTIPLICITY
		1319	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1320	#endif
1106	if (ev_is_active (w))	1321	if (ev_is_active (w))
1107	return;	1322	return;
1108		1323
1109	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1110		1325
1111	ev_start (EV_A_ (W)w, 1);	1326	ev_start (EV_A_ (W)w, 1);
1112	array_needsize (signals, signalmax, w->signum, signals_init);	1327	array_needsize (signals, signalmax, w->signum, signals_init);
1113	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1114		1329
1115	if (!w->next)	1330	if (!((WL)w)->next)
1116	{	1331	{
		1332	#if WIN32
		1333	signal (w->signum, sighandler);
		1334	#else
1117	struct sigaction sa;	1335	struct sigaction sa;
1118	sa.sa_handler = sighandler;	1336	sa.sa_handler = sighandler;
1119	sigfillset (&sa.sa_mask);	1337	sigfillset (&sa.sa_mask);
1120	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1121	sigaction (w->signum, &sa, 0);	1339	sigaction (w->signum, &sa, 0);
		1340	#endif
1122	}	1341	}
1123	}	1342	}
1124		1343
1125	void	1344	void
1126	ev_signal_stop (EV_P_ struct ev_signal *w)	1345	ev_signal_stop (EV_P_ struct ev_signal *w)
…		…
1135	if (!signals [w->signum - 1].head)	1354	if (!signals [w->signum - 1].head)
1136	signal (w->signum, SIG_DFL);	1355	signal (w->signum, SIG_DFL);
1137	}	1356	}
1138		1357
1139	void	1358	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)	1359	ev_child_start (EV_P_ struct ev_child *w)
1207	{	1360	{
		1361	#if EV_MULTIPLICITY
		1362	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1363	#endif
1208	if (ev_is_active (w))	1364	if (ev_is_active (w))
1209	return;	1365	return;
1210		1366
1211	ev_start (EV_A_ (W)w, 1);	1367	ev_start (EV_A_ (W)w, 1);
1212	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
…		…
1284	ev_timer_start (EV_A_ &once->to);	1440	ev_timer_start (EV_A_ &once->to);
1285	}	1441	}
1286	}	1442	}
1287	}	1443	}
1288		1444
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

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Comparing libev/ev.c (file contents): Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC vs. Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.52 by root, Sat Nov 3 22:10:39 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC