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

Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.49 by root, Sat Nov 3 16:16:58 2007 UTC

…		…
42	#include <stdio.h>	42	#include <stdio.h>
43		43
44	#include <assert.h>	44	#include <assert.h>
45	#include <errno.h>	45	#include <errno.h>
46	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
47	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
48	#include <sys/time.h>	50	#include <sys/time.h>
49	#include <time.h>	51	#include <time.h>
50		52
51	/**/	53	/**/
52		54
…		…
56		58
57	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
59	#endif	61	#endif
60		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
61	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
62	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
63	#endif	73	#endif
64		74
65	#ifndef EV_USE_REALTIME	75	#ifndef EV_USE_REALTIME
66	# define EV_USE_REALTIME 1	76	# define EV_USE_REALTIME 1
67	#endif	77	#endif
…		…
95	# define inline static	105	# define inline static
96	#endif	106	#endif
97		107
98	#define expect_false(expr) expect ((expr) != 0, 0)	108	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	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)
100		113
101	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
104		117
…		…
189	{	202	{
190	W w;	203	W w;
191	int events;	204	int events;
192	} ANPENDING;	205	} ANPENDING;
193		206
194	static ANPENDING *pendings;	207	static ANPENDING *pendings [NUMPRI];
195	static int pendingmax, pendingcnt;	208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
196		209
197	static void	210	static void
198	event (W w, int events)	211	event (W w, int events)
199	{	212	{
200	if (w->pending)	213	if (w->pending)
201	{	214	{
202	pendings [w->pending - 1].events \|= events;	215	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
203	return;	216	return;
204	}	217	}
205		218
206	w->pending = ++pendingcnt;	219	w->pending = ++pendingcnt [ABSPRI (w)];
207	array_needsize (pendings, pendingmax, pendingcnt, );	220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
208	pendings [pendingcnt - 1].w = w;	221	pendings [ABSPRI (w)][w->pending - 1].w = w;
209	pendings [pendingcnt - 1].events = events;	222	pendings [ABSPRI (w)][w->pending - 1].events = events;
210	}	223	}
211		224
212	static void	225	static void
213	queue_events (W *events, int eventcnt, int type)	226	queue_events (W *events, int eventcnt, int type)
214	{	227	{
…		…
277	++fdchangecnt;	290	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
279	fdchanges [fdchangecnt - 1] = fd;	292	fdchanges [fdchangecnt - 1] = fd;
280	}	293	}
281		294
		295	static void
		296	fd_kill (int fd)
		297	{
		298	struct ev_io *w;
		299
		300	printf ("killing fd %d\n", fd);//D
		301	while ((w = anfds [fd].head))
		302	{
		303	ev_io_stop (w);
		304	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		305	}
		306	}
		307
282	/* called on EBADF to verify fds */	308	/* called on EBADF to verify fds */
283	static void	309	static void
284	fd_recheck (void)	310	fd_ebadf (void)
285	{	311	{
286	int fd;	312	int fd;
287		313
288	for (fd = 0; fd < anfdmax; ++fd)	314	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	315	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
291	while (anfds [fd].head)	317	fd_kill (fd);
		318	}
		319
		320	/* called on ENOMEM in select/poll to kill some fds and retry */
		321	static void
		322	fd_enomem (void)
		323	{
		324	int fd = anfdmax;
		325
		326	while (fd--)
		327	if (anfds [fd].events)
292	{	328	{
293	ev_io_stop (anfds [fd].head);	329	close (fd);
294	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	330	fd_kill (fd);
		331	return;
295	}	332	}
296	}	333	}
297		334
298	/*****************************************************************************/	335	/*****************************************************************************/
299		336
300	static struct ev_timer **timers;	337	static struct ev_timer **timers;
…		…
376	{	413	{
377	signals [signum - 1].gotsig = 1;	414	signals [signum - 1].gotsig = 1;
378		415
379	if (!gotsig)	416	if (!gotsig)
380	{	417	{
		418	int old_errno = errno;
381	gotsig = 1;	419	gotsig = 1;
382	write (sigpipe [1], &signum, 1);	420	write (sigpipe [1], &signum, 1);
		421	errno = old_errno;
383	}	422	}
384	}	423	}
385		424
386	static void	425	static void
387	sigcb (struct ev_io *iow, int revents)	426	sigcb (struct ev_io *iow, int revents)
…		…
403	}	442	}
404		443
405	static void	444	static void
406	siginit (void)	445	siginit (void)
407	{	446	{
		447	#ifndef WIN32
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	448	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410		450
411	/* rather than sort out wether we really need nb, set it */	451	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	452	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		454	#endif
414		455
415	ev_io_set (&sigev, sigpipe [0], EV_READ);	456	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);	457	ev_io_start (&sigev);
417	}	458	}
418		459
…		…
430	/*****************************************************************************/	471	/*****************************************************************************/
431		472
432	static struct ev_child *childs [PID_HASHSIZE];	473	static struct ev_child *childs [PID_HASHSIZE];
433	static struct ev_signal childev;	474	static struct ev_signal childev;
434		475
		476	#ifndef WIN32
		477
435	#ifndef WCONTINUED	478	#ifndef WCONTINUED
436	# define WCONTINUED 0	479	# define WCONTINUED 0
437	#endif	480	#endif
438		481
439	static void	482	static void
		483	child_reap (struct ev_signal *sw, int chain, int pid, int status)
		484	{
		485	struct ev_child *w;
		486
		487	for (w = childs [chain & (PID_HASHSIZE - 1)]; w; w = w->next)
		488	if (w->pid == pid \|\| !w->pid)
		489	{
		490	w->priority = sw->priority; /* need to do it now */
		491	w->rpid = pid;
		492	w->rstatus = status;
		493	printf ("rpid %p %d %d\n", w, pid, w->pid);//D
		494	event ((W)w, EV_CHILD);
		495	}
		496	}
		497
		498	static void
440	childcb (struct ev_signal *sw, int revents)	499	childcb (struct ev_signal *sw, int revents)
441	{	500	{
442	struct ev_child *w;
443	int pid, status;	501	int pid, status;
444		502
		503	printf ("chld %x\n", revents);//D
445	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	504	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	505	{
447	if (w->pid == pid \|\| !w->pid)	506	/* make sure we are called again until all childs have been reaped */
448	{
449	w->status = status;
450	event ((W)w, EV_CHILD);	507	event ((W)sw, EV_SIGNAL);
451	}	508
		509	child_reap (sw, pid, pid, status);
		510	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		511	}
452	}	512	}
		513
		514	#endif
453		515
454	/*****************************************************************************/	516	/*****************************************************************************/
455		517
		518	#if EV_USE_KQUEUE
		519	# include "ev_kqueue.c"
		520	#endif
456	#if EV_USE_EPOLL	521	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	522	# include "ev_epoll.c"
458	#endif	523	#endif
		524	#if EV_USE_POLL
		525	# include "ev_poll.c"
		526	#endif
459	#if EV_USE_SELECT	527	#if EV_USE_SELECT
460	# include "ev_select.c"	528	# include "ev_select.c"
461	#endif	529	#endif
462		530
463	int	531	int
…		…
470	ev_version_minor (void)	538	ev_version_minor (void)
471	{	539	{
472	return EV_VERSION_MINOR;	540	return EV_VERSION_MINOR;
473	}	541	}
474		542
		543	/* return true if we are running with elevated privileges and should ignore env variables */
		544	static int
		545	enable_secure ()
		546	{
		547	#ifdef WIN32
		548	return 0;
		549	#else
		550	return getuid () != geteuid ()
		551	\|\| getgid () != getegid ();
		552	#endif
		553	}
		554
475	int ev_init (int flags)	555	int ev_init (int methods)
476	{	556	{
477	if (!ev_method)	557	if (!ev_method)
478	{	558	{
479	#if EV_USE_MONOTONIC	559	#if EV_USE_MONOTONIC
480	{	560	{
…		…
490	diff = ev_now - now;	570	diff = ev_now - now;
491		571
492	if (pipe (sigpipe))	572	if (pipe (sigpipe))
493	return 0;	573	return 0;
494		574
		575	if (methods == EVMETHOD_AUTO)
		576	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		577	methods = atoi (getenv ("LIBEV_METHODS"));
		578	else
495	ev_method = EVMETHOD_NONE;	579	methods = EVMETHOD_ANY;
		580
		581	ev_method = 0;
		582	#if EV_USE_KQUEUE
		583	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);
		584	#endif
496	#if EV_USE_EPOLL	585	#if EV_USE_EPOLL
497	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	586	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);
		587	#endif
		588	#if EV_USE_POLL
		589	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);
498	#endif	590	#endif
499	#if EV_USE_SELECT	591	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	592	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);
501	#endif	593	#endif
502		594
503	if (ev_method)	595	if (ev_method)
504	{	596	{
505	ev_watcher_init (&sigev, sigcb);	597	ev_watcher_init (&sigev, sigcb);
		598	ev_set_priority (&sigev, EV_MAXPRI);
506	siginit ();	599	siginit ();
507		600
		601	#ifndef WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	602	ev_signal_init (&childev, childcb, SIGCHLD);
		603	ev_set_priority (&childev, EV_MAXPRI);
509	ev_signal_start (&childev);	604	ev_signal_start (&childev);
		605	#endif
510	}	606	}
511	}	607	}
512		608
513	return ev_method;	609	return ev_method;
514	}	610	}
…		…
545	/*****************************************************************************/	641	/*****************************************************************************/
546		642
547	static void	643	static void
548	call_pending (void)	644	call_pending (void)
549	{	645	{
		646	int pri;
		647
		648	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	649	while (pendingcnt [pri])
551	{	650	{
552	ANPENDING *p = pendings + --pendingcnt;	651	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		652
554	if (p->w)	653	if (p->w)
555	{	654	{
556	p->w->pending = 0;	655	p->w->pending = 0;
557	p->w->cb (p->w, p->events);	656	p->w->cb (p->w, p->events);
558	}	657	}
559	}	658	}
560	}	659	}
561		660
562	static void	661	static void
563	timers_reify (void)	662	timers_reify (void)
564	{	663	{
…		…
796	static void	895	static void
797	ev_clear_pending (W w)	896	ev_clear_pending (W w)
798	{	897	{
799	if (w->pending)	898	if (w->pending)
800	{	899	{
801	pendings [w->pending - 1].w = 0;	900	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	901	w->pending = 0;
803	}	902	}
804	}	903	}
805		904
806	static void	905	static void
807	ev_start (W w, int active)	906	ev_start (W w, int active)
808	{	907	{
		908	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		909	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		910
809	w->active = active;	911	w->active = active;
810	}	912	}
811		913
812	static void	914	static void
813	ev_stop (W w)	915	ev_stop (W w)
…		…
930	}	1032	}
931		1033
932	ev_stop ((W)w);	1034	ev_stop ((W)w);
933	}	1035	}
934		1036
		1037	#ifndef SA_RESTART
		1038	# define SA_RESTART 0
		1039	#endif
		1040
935	void	1041	void
936	ev_signal_start (struct ev_signal *w)	1042	ev_signal_start (struct ev_signal *w)
937	{	1043	{
938	if (ev_is_active (w))	1044	if (ev_is_active (w))
939	return;	1045	return;
…		…
947	if (!w->next)	1053	if (!w->next)
948	{	1054	{
949	struct sigaction sa;	1055	struct sigaction sa;
950	sa.sa_handler = sighandler;	1056	sa.sa_handler = sighandler;
951	sigfillset (&sa.sa_mask);	1057	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	1058	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	1059	sigaction (w->signum, &sa, 0);
954	}	1060	}
955	}	1061	}
956		1062
957	void	1063	void

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Comparing libev/ev.c (file contents): Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs. Revision 1.49 by root, Sat Nov 3 16:16:58 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.49 by root, Sat Nov 3 16:16:58 2007 UTC