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

Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.53 by root, Sat Nov 3 22:31:11 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_USEV_POLL
		64	# define EV_USEV_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 */
75	ev_tstamp ev_now;
76	int ev_method;
77
78	static int have_monotonic; /* runtime */
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83
84	/*****************************************************************************/	118	/*****************************************************************************/
85		119
86	ev_tstamp	120	typedef struct
		121	{
		122	struct ev_watcher_list *head;
		123	unsigned char events;
		124	unsigned char reify;
		125	} ANFD;
		126
		127	typedef struct
		128	{
		129	W w;
		130	int events;
		131	} ANPENDING;
		132
		133	#ifdef EV_MULTIPLICITY
		134	struct ev_loop
		135	{
		136	# define VAR(name,decl) decl
		137	# include "ev_vars.h"
		138	};
		139	#else
		140	# define VAR(name,decl) static decl
		141	# include "ev_vars.h"
		142	#endif
		143	#undef VAR
		144
		145	/*****************************************************************************/
		146
		147	inline ev_tstamp
87	ev_time (void)	148	ev_time (void)
88	{	149	{
89	#if HAVE_REALTIME	150	#if EV_USE_REALTIME
90	struct timespec ts;	151	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	152	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	153	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	154	#else
94	struct timeval tv;	155	struct timeval tv;
95	gettimeofday (&tv, 0);	156	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	157	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	158	#endif
98	}	159	}
99		160
100	static ev_tstamp	161	inline ev_tstamp
101	get_clock (void)	162	get_clock (void)
102	{	163	{
103	#if HAVE_MONOTONIC	164	#if EV_USE_MONOTONIC
104	if (have_monotonic)	165	if (expect_true (have_monotonic))
105	{	166	{
106	struct timespec ts;	167	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	168	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	169	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	170	}
110	#endif	171	#endif
111		172
112	return ev_time ();	173	return ev_time ();
113	}	174	}
114		175
		176	ev_tstamp
		177	ev_now (EV_P)
		178	{
		179	return rt_now;
		180	}
		181
		182	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		183
115	#define array_needsize(base,cur,cnt,init) \	184	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	185	if (expect_false ((cnt) > cur)) \
117	{ \	186	{ \
118	int newcnt = cur; \	187	int newcnt = cur; \
119	do \	188	do \
120	{ \	189	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	190	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	191	} \
123	while ((cnt) > newcnt); \	192	while ((cnt) > newcnt); \
124	\	193	\
125	base = realloc (base, sizeof (base) (newcnt)); \	194	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	195	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	196	cur = newcnt; \
128	}	197	}
129		198
130	/*****************************************************************************/	199	/*****************************************************************************/
131		200
132	typedef struct
133	{
134	struct ev_io *head;
135	int events;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static void	201	static void
142	anfds_init (ANFD *base, int count)	202	anfds_init (ANFD *base, int count)
143	{	203	{
144	while (count--)	204	while (count--)
145	{	205	{
146	base->head = 0;	206	base->head = 0;
147	base->events = EV_NONE;	207	base->events = EV_NONE;
		208	base->reify = 0;
		209
148	++base;	210	++base;
149	}	211	}
150	}	212	}
151		213
152	typedef struct
153	{
154	W w;
155	int events;
156	} ANPENDING;
157
158	static ANPENDING *pendings;
159	static int pendingmax, pendingcnt;
160
161	static void	214	static void
162	event (W w, int events)	215	event (EV_P_ W w, int events)
163	{	216	{
164	if (w->active)	217	if (w->pending)
165	{	218	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	219	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		220	return;
170	}	221	}
171	}
172		222
		223	w->pending = ++pendingcnt [ABSPRI (w)];
		224	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		225	pendings [ABSPRI (w)][w->pending - 1].w = w;
		226	pendings [ABSPRI (w)][w->pending - 1].events = events;
		227	}
		228
173	static void	229	static void
174	queue_events (W *events, int eventcnt, int type)	230	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	231	{
176	int i;	232	int i;
177		233
178	for (i = 0; i < eventcnt; ++i)	234	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	235	event (EV_A_ events [i], type);
180	}	236	}
181		237
182	static void	238	static void
183	fd_event (int fd, int events)	239	fd_event (EV_P_ int fd, int events)
184	{	240	{
185	ANFD *anfd = anfds + fd;	241	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	242	struct ev_io *w;
187		243
188	for (w = anfd->head; w; w = w->next)	244	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
189	{	245	{
190	int ev = w->events & events;	246	int ev = w->events & events;
191		247
192	if (ev)	248	if (ev)
193	event ((W)w, ev);	249	event (EV_A_ (W)w, ev);
194	}	250	}
195	}	251	}
196		252
197	/*****************************************************************************/	253	/*****************************************************************************/
198		254
199	static int *fdchanges;
200	static int fdchangemax, fdchangecnt;
201
202	static void	255	static void
203	fd_reify (void)	256	fd_reify (EV_P)
204	{	257	{
205	int i;	258	int i;
206		259
207	for (i = 0; i < fdchangecnt; ++i)	260	for (i = 0; i < fdchangecnt; ++i)
208	{	261	{
…		…
210	ANFD *anfd = anfds + fd;	263	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	264	struct ev_io *w;
212		265
213	int events = 0;	266	int events = 0;
214		267
215	for (w = anfd->head; w; w = w->next)	268	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
216	events \|= w->events;	269	events \|= w->events;
217		270
218	anfd->events &= ~EV_REIFY;	271	anfd->reify = 0;
219		272
220	if (anfd->events != events)	273	if (anfd->events != events)
221	{	274	{
222	method_modify (fd, anfd->events, events);	275	method_modify (EV_A_ fd, anfd->events, events);
223	anfd->events = events;	276	anfd->events = events;
224	}	277	}
225	}	278	}
226		279
227	fdchangecnt = 0;	280	fdchangecnt = 0;
228	}	281	}
229		282
230	static void	283	static void
231	fd_change (int fd)	284	fd_change (EV_P_ int fd)
232	{	285	{
233	if (anfds [fd].events & EV_REIFY)	286	if (anfds [fd].reify \|\| fdchangecnt < 0)
234	return;	287	return;
235		288
236	anfds [fd].events \|= EV_REIFY;	289	anfds [fd].reify = 1;
237		290
238	++fdchangecnt;	291	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	292	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
240	fdchanges [fdchangecnt - 1] = fd;	293	fdchanges [fdchangecnt - 1] = fd;
241	}	294	}
242		295
		296	static void
		297	fd_kill (EV_P_ int fd)
		298	{
		299	struct ev_io *w;
		300
		301	while ((w = (struct ev_io *)anfds [fd].head))
		302	{
		303	ev_io_stop (EV_A_ w);
		304	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		305	}
		306	}
		307
243	/* called on EBADF to verify fds */	308	/* called on EBADF to verify fds */
244	static void	309	static void
245	fd_recheck (void)	310	fd_ebadf (EV_P)
246	{	311	{
247	int fd;	312	int fd;
248		313
249	for (fd = 0; fd < anfdmax; ++fd)	314	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	315	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
252	while (anfds [fd].head)	317	fd_kill (EV_A_ fd);
		318	}
		319
		320	/* called on ENOMEM in select/poll to kill some fds and retry */
		321	static void
		322	fd_enomem (EV_P)
		323	{
		324	int fd = anfdmax;
		325
		326	while (fd--)
		327	if (anfds [fd].events)
253	{	328	{
254	event ((W)anfds [fd].head, EV_ERROR);	329	close (fd);
255	evio_stop (anfds [fd].head);	330	fd_kill (EV_A_ fd);
		331	return;
256	}	332	}
257	}	333	}
258		334
259	/*****************************************************************************/	335	/*****************************************************************************/
260
261	static struct ev_timer **timers;
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266		336
267	static void	337	static void
268	upheap (WT *timers, int k)	338	upheap (WT *timers, int k)
269	{	339	{
270	WT w = timers [k];	340	WT w = timers [k];
…		…
307		377
308	/*****************************************************************************/	378	/*****************************************************************************/
309		379
310	typedef struct	380	typedef struct
311	{	381	{
312	struct ev_signal *head;	382	struct ev_watcher_list *head;
313	sig_atomic_t gotsig;	383	sig_atomic_t volatile gotsig;
314	} ANSIG;	384	} ANSIG;
315		385
316	static ANSIG *signals;	386	static ANSIG *signals;
317	static int signalmax;	387	static int signalmax;
318		388
319	static int sigpipe [2];	389	static int sigpipe [2];
320	static sig_atomic_t gotsig;	390	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;
322		391
323	static void	392	static void
324	signals_init (ANSIG *base, int count)	393	signals_init (ANSIG *base, int count)
325	{	394	{
326	while (count--)	395	while (count--)
327	{	396	{
328	base->head = 0;	397	base->head = 0;
329	base->gotsig = 0;	398	base->gotsig = 0;
		399
330	++base;	400	++base;
331	}	401	}
332	}	402	}
333		403
334	static void	404	static void
…		…
336	{	406	{
337	signals [signum - 1].gotsig = 1;	407	signals [signum - 1].gotsig = 1;
338		408
339	if (!gotsig)	409	if (!gotsig)
340	{	410	{
		411	int old_errno = errno;
341	gotsig = 1;	412	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	413	write (sigpipe [1], &signum, 1);
		414	errno = old_errno;
343	}	415	}
344	}	416	}
345		417
346	static void	418	static void
347	sigcb (struct ev_io *iow, int revents)	419	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	420	{
349	struct ev_signal *w;	421	struct ev_watcher_list *w;
350	int sig;	422	int signum;
351		423
		424	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	425	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		426
355	for (sig = signalmax; sig--; )	427	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	428	if (signals [signum].gotsig)
357	{	429	{
358	signals [sig].gotsig = 0;	430	signals [signum].gotsig = 0;
359		431
360	for (w = signals [sig].head; w; w = w->next)	432	for (w = signals [signum].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);	433	event (EV_A_ (W)w, EV_SIGNAL);
362	}	434	}
363	}	435	}
364		436
365	static void	437	static void
366	siginit (void)	438	siginit (EV_P)
367	{	439	{
		440	#ifndef WIN32
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	441	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	442	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370		443
371	/* rather than sort out wether we really need nb, set it */	444	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	445	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	446	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		447	#endif
374		448
375	evio_set (&sigev, sigpipe [0], EV_READ);	449	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	evio_start (&sigev);	450	ev_io_start (&sigev);
		451	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	452	}
378		453
379	/*****************************************************************************/	454	/*****************************************************************************/
380		455
381	static struct ev_idle **idles;	456	#ifndef WIN32
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391
392	static struct ev_child *childs [PID_HASHSIZE];
393	static struct ev_signal childev;
394		457
395	#ifndef WCONTINUED	458	#ifndef WCONTINUED
396	# define WCONTINUED 0	459	# define WCONTINUED 0
397	#endif	460	#endif
398		461
399	static void	462	static void
400	childcb (struct ev_signal *sw, int revents)	463	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	464	{
402	struct ev_child *w;	465	struct ev_child *w;
		466
		467	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		468	if (w->pid == pid \|\| !w->pid)
		469	{
		470	w->priority = sw->priority; /* need to do it now */
		471	w->rpid = pid;
		472	w->rstatus = status;
		473	event (EV_A_ (W)w, EV_CHILD);
		474	}
		475	}
		476
		477	static void
		478	childcb (EV_P_ struct ev_signal *sw, int revents)
		479	{
403	int pid, status;	480	int pid, status;
404		481
405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	482	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	483	{
407	if (w->pid == pid \|\| w->pid == -1)	484	/* make sure we are called again until all childs have been reaped */
408	{	485	event (EV_A_ (W)sw, EV_SIGNAL);
409	w->status = status;	486
410	event ((W)w, EV_CHILD);	487	child_reap (EV_A_ sw, pid, pid, status);
411	}	488	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		489	}
412	}	490	}
		491
		492	#endif
413		493
414	/*****************************************************************************/	494	/*****************************************************************************/
415		495
		496	#if EV_USE_KQUEUE
		497	# include "ev_kqueue.c"
		498	#endif
416	#if HAVE_EPOLL	499	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	500	# include "ev_epoll.c"
418	#endif	501	#endif
		502	#if EV_USEV_POLL
		503	# include "ev_poll.c"
		504	#endif
419	#if HAVE_SELECT	505	#if EV_USE_SELECT
420	# include "ev_select.c"	506	# include "ev_select.c"
421	#endif	507	#endif
422		508
423	int	509	int
424	ev_version_major (void)	510	ev_version_major (void)
…		…
430	ev_version_minor (void)	516	ev_version_minor (void)
431	{	517	{
432	return EV_VERSION_MINOR;	518	return EV_VERSION_MINOR;
433	}	519	}
434		520
435	int ev_init (int flags)	521	/* return true if we are running with elevated privileges and should ignore env variables */
		522	static int
		523	enable_secure (void)
436	{	524	{
		525	#ifdef WIN32
		526	return 0;
		527	#else
		528	return getuid () != geteuid ()
		529	\|\| getgid () != getegid ();
		530	#endif
		531	}
		532
		533	int
		534	ev_method (EV_P)
		535	{
		536	return method;
		537	}
		538
		539	int
		540	ev_init (EV_P_ int methods)
		541	{
		542	#ifdef EV_MULTIPLICITY
		543	memset (loop, 0, sizeof (struct ev_loop));
		544	#endif
		545
437	if (!ev_method)	546	if (!method)
438	{	547	{
439	#if HAVE_MONOTONIC	548	#if EV_USE_MONOTONIC
440	{	549	{
441	struct timespec ts;	550	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	551	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	552	have_monotonic = 1;
444	}	553	}
445	#endif	554	#endif
446		555
447	ev_now = ev_time ();	556	rt_now = ev_time ();
448	now = get_clock ();	557	mn_now = get_clock ();
		558	now_floor = mn_now;
449	diff = ev_now - now;	559	diff = rt_now - mn_now;
450		560
451	if (pipe (sigpipe))	561	if (pipe (sigpipe))
452	return 0;	562	return 0;
453		563
		564	if (methods == EVMETHOD_AUTO)
		565	if (!enable_secure () && getenv ("LIBmethodS"))
		566	methods = atoi (getenv ("LIBmethodS"));
		567	else
454	ev_method = EVMETHOD_NONE;	568	methods = EVMETHOD_ANY;
		569
		570	method = 0;
		571	#if EV_USE_KQUEUE
		572	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		573	#endif
455	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	575	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
457	#endif	576	#endif
		577	#if EV_USEV_POLL
		578	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		579	#endif
458	#if HAVE_SELECT	580	#if EV_USE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);	581	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
460	#endif	582	#endif
461		583
462	if (ev_method)	584	if (method)
463	{	585	{
464	evw_init (&sigev, sigcb);	586	ev_watcher_init (&sigev, sigcb);
		587	ev_set_priority (&sigev, EV_MAXPRI);
465	siginit ();	588	siginit (EV_A);
466		589
		590	#ifndef WIN32
467	evsignal_init (&childev, childcb, SIGCHLD);	591	ev_signal_init (&childev, childcb, SIGCHLD);
		592	ev_set_priority (&childev, EV_MAXPRI);
468	evsignal_start (&childev);	593	ev_signal_start (EV_A_ &childev);
		594	ev_unref (EV_A); /* child watcher should not keep loop alive */
		595	#endif
469	}	596	}
470	}	597	}
471		598
472	return ev_method;	599	return method;
473	}	600	}
474		601
475	/*****************************************************************************/	602	/*****************************************************************************/
476		603
477	void	604	void
478	ev_prefork (void)	605	ev_fork_prepare (void)
479	{	606	{
480	/* nop */	607	/* nop */
481	}	608	}
482		609
483	void	610	void
484	ev_postfork_parent (void)	611	ev_fork_parent (void)
485	{	612	{
486	/* nop */	613	/* nop */
487	}	614	}
488		615
489	void	616	void
490	ev_postfork_child (void)	617	ev_fork_child (void)
491	{	618	{
492	#if HAVE_EPOLL	619	#if EV_USE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)	620	if (method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();	621	epoll_postfork_child ();
495	#endif	622	#endif
496		623
497	evio_stop (&sigev);	624	ev_io_stop (&sigev);
498	close (sigpipe [0]);	625	close (sigpipe [0]);
499	close (sigpipe [1]);	626	close (sigpipe [1]);
500	pipe (sigpipe);	627	pipe (sigpipe);
501	siginit ();	628	siginit ();
502	}	629	}
503		630
504	/*****************************************************************************/	631	/*****************************************************************************/
505		632
506	static void	633	static void
507	call_pending (void)	634	call_pending (EV_P)
508	{	635	{
		636	int pri;
		637
		638	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	639	while (pendingcnt [pri])
510	{	640	{
511	ANPENDING *p = pendings + --pendingcnt;	641	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		642
513	if (p->w)	643	if (p->w)
514	{	644	{
515	p->w->pending = 0;	645	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	646	p->w->cb (EV_A_ p->w, p->events);
517	}	647	}
518	}	648	}
519	}	649	}
520		650
521	static void	651	static void
522	timers_reify (void)	652	timers_reify (EV_P)
523	{	653	{
524	while (timercnt && timers [0]->at <= now)	654	while (timercnt && timers [0]->at <= mn_now)
525	{	655	{
526	struct ev_timer *w = timers [0];	656	struct ev_timer *w = timers [0];
527
528	event ((W)w, EV_TIMEOUT);
529		657
530	/* first reschedule or stop timer */	658	/* first reschedule or stop timer */
531	if (w->repeat)	659	if (w->repeat)
532	{	660	{
		661	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	662	w->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	663	downheap ((WT *)timers, timercnt, 0);
536	}	664	}
537	else	665	else
538	evtimer_stop (w); /* nonrepeating: stop timer */	666	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		667
		668	event ((W)w, EV_TIMEOUT);
		669	}
		670	}
		671
542	static void	672	static void
543	periodics_reify (void)	673	periodics_reify (EV_P)
544	{	674	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	675	while (periodiccnt && periodics [0]->at <= rt_now)
546	{	676	{
547	struct ev_periodic *w = periodics [0];	677	struct ev_periodic *w = periodics [0];
548		678
549	/* first reschedule or stop timer */	679	/* first reschedule or stop timer */
550	if (w->interval)	680	if (w->interval)
551	{	681	{
552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	682	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
553	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	683	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
554	downheap ((WT *)periodics, periodiccnt, 0);	684	downheap ((WT *)periodics, periodiccnt, 0);
555	}	685	}
556	else	686	else
557	evperiodic_stop (w); /* nonrepeating: stop timer */	687	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		688
559	event ((W)w, EV_TIMEOUT);	689	event (EV_A_ (W)w, EV_PERIODIC);
560	}	690	}
561	}	691	}
562		692
563	static void	693	static void
564	periodics_reschedule (ev_tstamp diff)	694	periodics_reschedule (EV_P_ ev_tstamp diff)
565	{	695	{
566	int i;	696	int i;
567		697
568	/* adjust periodics after time jump */	698	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	699	for (i = 0; i < periodiccnt; ++i)
570	{	700	{
571	struct ev_periodic *w = periodics [i];	701	struct ev_periodic *w = periodics [i];
572		702
573	if (w->interval)	703	if (w->interval)
574	{	704	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	705	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
576		706
577	if (fabs (diff) >= 1e-4)	707	if (fabs (diff) >= 1e-4)
578	{	708	{
579	evperiodic_stop (w);	709	ev_periodic_stop (EV_A_ w);
580	evperiodic_start (w);	710	ev_periodic_start (EV_A_ w);
581		711
582	i = 0; /* restart loop, inefficient, but time jumps should be rare */	712	i = 0; /* restart loop, inefficient, but time jumps should be rare */
583	}	713	}
584	}	714	}
585	}	715	}
586	}	716	}
587		717
		718	inline int
		719	time_update_monotonic (EV_P)
		720	{
		721	mn_now = get_clock ();
		722
		723	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		724	{
		725	rt_now = mn_now + diff;
		726	return 0;
		727	}
		728	else
		729	{
		730	now_floor = mn_now;
		731	rt_now = ev_time ();
		732	return 1;
		733	}
		734	}
		735
588	static void	736	static void
589	time_update (void)	737	time_update (EV_P)
590	{	738	{
591	int i;	739	int i;
592		740
593	ev_now = ev_time ();	741	#if EV_USE_MONOTONIC
594
595	if (have_monotonic)	742	if (expect_true (have_monotonic))
596	{	743	{
597	ev_tstamp odiff = diff;	744	if (time_update_monotonic (EV_A))
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	745	{
601	now = get_clock ();	746	ev_tstamp odiff = diff;
		747
		748	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		749	{
602	diff = ev_now - now;	750	diff = rt_now - mn_now;
603		751
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)	752	if (fabs (odiff - diff) < MIN_TIMEJUMP)
605	return; /* all is well */	753	return; /* all is well */
606		754
607	ev_now = ev_time ();	755	rt_now = ev_time ();
		756	mn_now = get_clock ();
		757	now_floor = mn_now;
		758	}
		759
		760	periodics_reschedule (EV_A_ diff - odiff);
		761	/* no timer adjustment, as the monotonic clock doesn't jump */
608	}	762	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}	763	}
613	else	764	else
		765	#endif
614	{	766	{
615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	767	rt_now = ev_time ();
		768
		769	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
616	{	770	{
617	periodics_reschedule (ev_now - now);	771	periodics_reschedule (EV_A_ rt_now - mn_now);
618		772
619	/* adjust timers. this is easy, as the offset is the same for all */	773	/* adjust timers. this is easy, as the offset is the same for all */
620	for (i = 0; i < timercnt; ++i)	774	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	775	timers [i]->at += diff;
622	}	776	}
623		777
624	now = ev_now;	778	mn_now = rt_now;
625	}	779	}
626	}	780	}
627		781
628	int ev_loop_done;	782	void
		783	ev_ref (EV_P)
		784	{
		785	++activecnt;
		786	}
629		787
		788	void
		789	ev_unref (EV_P)
		790	{
		791	--activecnt;
		792	}
		793
		794	static int loop_done;
		795
		796	void
630	void ev_loop (int flags)	797	ev_loop (EV_P_ int flags)
631	{	798	{
632	double block;	799	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	800	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
634		801
635	do	802	do
636	{	803	{
637	/* queue check watchers (and execute them) */	804	/* queue check watchers (and execute them) */
638	if (preparecnt)	805	if (expect_false (preparecnt))
639	{	806	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	807	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	808	call_pending (EV_A);
642	}	809	}
643		810
644	/* update fd-related kernel structures */	811	/* update fd-related kernel structures */
645	fd_reify ();	812	fd_reify (EV_A);
646		813
647	/* calculate blocking time */	814	/* calculate blocking time */
648		815
649	/* we only need this for !monotonic clockor timers, but as we basically	816	/* we only need this for !monotonic clockor timers, but as we basically
650	always have timers, we just calculate it always */	817	always have timers, we just calculate it always */
		818	#if EV_USE_MONOTONIC
		819	if (expect_true (have_monotonic))
		820	time_update_monotonic (EV_A);
		821	else
		822	#endif
		823	{
651	ev_now = ev_time ();	824	rt_now = ev_time ();
		825	mn_now = rt_now;
		826	}
652		827
653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	828	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
654	block = 0.;	829	block = 0.;
655	else	830	else
656	{	831	{
657	block = MAX_BLOCKTIME;	832	block = MAX_BLOCKTIME;
658		833
659	if (timercnt)	834	if (timercnt)
660	{	835	{
661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	836	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
662	if (block > to) block = to;	837	if (block > to) block = to;
663	}	838	}
664		839
665	if (periodiccnt)	840	if (periodiccnt)
666	{	841	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	842	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
668	if (block > to) block = to;	843	if (block > to) block = to;
669	}	844	}
670		845
671	if (block < 0.) block = 0.;	846	if (block < 0.) block = 0.;
672	}	847	}
673		848
674	method_poll (block);	849	method_poll (EV_A_ block);
675		850
676	/* update ev_now, do magic */	851	/* update rt_now, do magic */
677	time_update ();	852	time_update (EV_A);
678		853
679	/* queue pending timers and reschedule them */	854	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	855	timers_reify (EV_A); /* relative timers called last */
681	periodics_reify (); /* absolute timers called first */	856	periodics_reify (EV_A); /* absolute timers called first */
682		857
683	/* queue idle watchers unless io or timers are pending */	858	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	859	if (!pendingcnt)
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	860	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		861
687	/* queue check watchers, to be executed first */	862	/* queue check watchers, to be executed first */
688	if (checkcnt)	863	if (checkcnt)
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	864	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		865
691	call_pending ();	866	call_pending (EV_A);
692	}	867	}
693	while (!ev_loop_done);	868	while (activecnt && !loop_done);
694		869
695	if (ev_loop_done != 2)	870	if (loop_done != 2)
696	ev_loop_done = 0;	871	loop_done = 0;
		872	}
		873
		874	void
		875	ev_unloop (EV_P_ int how)
		876	{
		877	loop_done = how;
697	}	878	}
698		879
699	/*****************************************************************************/	880	/*****************************************************************************/
700		881
701	static void	882	inline void
702	wlist_add (WL *head, WL elem)	883	wlist_add (WL *head, WL elem)
703	{	884	{
704	elem->next = *head;	885	elem->next = *head;
705	*head = elem;	886	*head = elem;
706	}	887	}
707		888
708	static void	889	inline void
709	wlist_del (WL *head, WL elem)	890	wlist_del (WL *head, WL elem)
710	{	891	{
711	while (*head)	892	while (*head)
712	{	893	{
713	if (*head == elem)	894	if (*head == elem)
…		…
718		899
719	head = &(*head)->next;	900	head = &(*head)->next;
720	}	901	}
721	}	902	}
722		903
723	static void	904	inline void
724	ev_clear (W w)	905	ev_clear_pending (EV_P_ W w)
725	{	906	{
726	if (w->pending)	907	if (w->pending)
727	{	908	{
728	pendings [w->pending - 1].w = 0;	909	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	910	w->pending = 0;
730	}	911	}
731	}	912	}
732		913
733	static void	914	inline void
734	ev_start (W w, int active)	915	ev_start (EV_P_ W w, int active)
735	{	916	{
		917	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		918	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		919
736	w->active = active;	920	w->active = active;
		921	ev_ref (EV_A);
737	}	922	}
738		923
739	static void	924	inline void
740	ev_stop (W w)	925	ev_stop (EV_P_ W w)
741	{	926	{
		927	ev_unref (EV_A);
742	w->active = 0;	928	w->active = 0;
743	}	929	}
744		930
745	/*****************************************************************************/	931	/*****************************************************************************/
746		932
747	void	933	void
748	evio_start (struct ev_io *w)	934	ev_io_start (EV_P_ struct ev_io *w)
749	{	935	{
		936	int fd = w->fd;
		937
750	if (ev_is_active (w))	938	if (ev_is_active (w))
751	return;	939	return;
752		940
753	int fd = w->fd;	941	assert (("ev_io_start called with negative fd", fd >= 0));
754		942
755	ev_start ((W)w, 1);	943	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	944	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	945	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		946
759	fd_change (fd);	947	fd_change (EV_A_ fd);
760	}	948	}
761		949
762	void	950	void
763	evio_stop (struct ev_io *w)	951	ev_io_stop (EV_P_ struct ev_io *w)
764	{	952	{
765	ev_clear ((W)w);	953	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	954	if (!ev_is_active (w))
767	return;	955	return;
768		956
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	957	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	958	ev_stop (EV_A_ (W)w);
771		959
772	fd_change (w->fd);	960	fd_change (EV_A_ w->fd);
773	}	961	}
774		962
775	void	963	void
776	evtimer_start (struct ev_timer *w)	964	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	965	{
778	if (ev_is_active (w))	966	if (ev_is_active (w))
779	return;	967	return;
780		968
781	w->at += now;	969	w->at += mn_now;
782		970
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	971	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		972
785	ev_start ((W)w, ++timercnt);	973	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	974	array_needsize (timers, timermax, timercnt, );
787	timers [timercnt - 1] = w;	975	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	976	upheap ((WT *)timers, timercnt - 1);
789	}	977	}
790		978
791	void	979	void
792	evtimer_stop (struct ev_timer *w)	980	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	981	{
794	ev_clear ((W)w);	982	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	983	if (!ev_is_active (w))
796	return;	984	return;
797		985
798	if (w->active < timercnt--)	986	if (w->active < timercnt--)
799	{	987	{
…		…
801	downheap ((WT *)timers, timercnt, w->active - 1);	989	downheap ((WT *)timers, timercnt, w->active - 1);
802	}	990	}
803		991
804	w->at = w->repeat;	992	w->at = w->repeat;
805		993
806	ev_stop ((W)w);	994	ev_stop (EV_A_ (W)w);
807	}	995	}
808		996
809	void	997	void
810	evtimer_again (struct ev_timer *w)	998	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	999	{
812	if (ev_is_active (w))	1000	if (ev_is_active (w))
813	{	1001	{
814	if (w->repeat)	1002	if (w->repeat)
815	{	1003	{
816	w->at = now + w->repeat;	1004	w->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1005	downheap ((WT *)timers, timercnt, w->active - 1);
818	}	1006	}
819	else	1007	else
820	evtimer_stop (w);	1008	ev_timer_stop (EV_A_ w);
821	}	1009	}
822	else if (w->repeat)	1010	else if (w->repeat)
823	evtimer_start (w);	1011	ev_timer_start (EV_A_ w);
824	}	1012	}
825		1013
826	void	1014	void
827	evperiodic_start (struct ev_periodic *w)	1015	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1016	{
829	if (ev_is_active (w))	1017	if (ev_is_active (w))
830	return;	1018	return;
831		1019
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1020	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
833		1021
834	/* this formula differs from the one in periodic_reify because we do not always round up */	1022	/* this formula differs from the one in periodic_reify because we do not always round up */
835	if (w->interval)	1023	if (w->interval)
836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1024	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
837		1025
838	ev_start ((W)w, ++periodiccnt);	1026	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1027	array_needsize (periodics, periodicmax, periodiccnt, );
840	periodics [periodiccnt - 1] = w;	1028	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1029	upheap ((WT *)periodics, periodiccnt - 1);
842	}	1030	}
843		1031
844	void	1032	void
845	evperiodic_stop (struct ev_periodic *w)	1033	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1034	{
847	ev_clear ((W)w);	1035	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1036	if (!ev_is_active (w))
849	return;	1037	return;
850		1038
851	if (w->active < periodiccnt--)	1039	if (w->active < periodiccnt--)
852	{	1040	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1041	periodics [w->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1042	downheap ((WT *)periodics, periodiccnt, w->active - 1);
855	}	1043	}
856		1044
857	ev_stop ((W)w);	1045	ev_stop (EV_A_ (W)w);
858	}	1046	}
859		1047
		1048	#ifndef SA_RESTART
		1049	# define SA_RESTART 0
		1050	#endif
		1051
860	void	1052	void
861	evsignal_start (struct ev_signal *w)	1053	ev_signal_start (EV_P_ struct ev_signal *w)
862	{	1054	{
863	if (ev_is_active (w))	1055	if (ev_is_active (w))
864	return;	1056	return;
865		1057
		1058	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1059
866	ev_start ((W)w, 1);	1060	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1061	array_needsize (signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1062	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1063
870	if (!w->next)	1064	if (!w->next)
871	{	1065	{
872	struct sigaction sa;	1066	struct sigaction sa;
873	sa.sa_handler = sighandler;	1067	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1068	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1069	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1070	sigaction (w->signum, &sa, 0);
877	}	1071	}
878	}	1072	}
879		1073
880	void	1074	void
881	evsignal_stop (struct ev_signal *w)	1075	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1076	{
883	ev_clear ((W)w);	1077	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1078	if (!ev_is_active (w))
885	return;	1079	return;
886		1080
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1081	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1082	ev_stop (EV_A_ (W)w);
889		1083
890	if (!signals [w->signum - 1].head)	1084	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1085	signal (w->signum, SIG_DFL);
892	}	1086	}
893		1087
		1088	void
894	void evidle_start (struct ev_idle *w)	1089	ev_idle_start (EV_P_ struct ev_idle *w)
895	{	1090	{
896	if (ev_is_active (w))	1091	if (ev_is_active (w))
897	return;	1092	return;
898		1093
899	ev_start ((W)w, ++idlecnt);	1094	ev_start (EV_A_ (W)w, ++idlecnt);
900	array_needsize (idles, idlemax, idlecnt, );	1095	array_needsize (idles, idlemax, idlecnt, );
901	idles [idlecnt - 1] = w;	1096	idles [idlecnt - 1] = w;
902	}	1097	}
903		1098
		1099	void
904	void evidle_stop (struct ev_idle *w)	1100	ev_idle_stop (EV_P_ struct ev_idle *w)
905	{	1101	{
906	ev_clear ((W)w);	1102	ev_clear_pending (EV_A_ (W)w);
907	if (ev_is_active (w))	1103	if (ev_is_active (w))
908	return;	1104	return;
909		1105
910	idles [w->active - 1] = idles [--idlecnt];	1106	idles [w->active - 1] = idles [--idlecnt];
911	ev_stop ((W)w);	1107	ev_stop (EV_A_ (W)w);
912	}	1108	}
913		1109
		1110	void
914	void evprepare_start (struct ev_prepare *w)	1111	ev_prepare_start (EV_P_ struct ev_prepare *w)
915	{	1112	{
916	if (ev_is_active (w))	1113	if (ev_is_active (w))
917	return;	1114	return;
918		1115
919	ev_start ((W)w, ++preparecnt);	1116	ev_start (EV_A_ (W)w, ++preparecnt);
920	array_needsize (prepares, preparemax, preparecnt, );	1117	array_needsize (prepares, preparemax, preparecnt, );
921	prepares [preparecnt - 1] = w;	1118	prepares [preparecnt - 1] = w;
922	}	1119	}
923		1120
		1121	void
924	void evprepare_stop (struct ev_prepare *w)	1122	ev_prepare_stop (EV_P_ struct ev_prepare *w)
925	{	1123	{
926	ev_clear ((W)w);	1124	ev_clear_pending (EV_A_ (W)w);
927	if (ev_is_active (w))	1125	if (ev_is_active (w))
928	return;	1126	return;
929		1127
930	prepares [w->active - 1] = prepares [--preparecnt];	1128	prepares [w->active - 1] = prepares [--preparecnt];
931	ev_stop ((W)w);	1129	ev_stop (EV_A_ (W)w);
932	}	1130	}
933		1131
		1132	void
934	void evcheck_start (struct ev_check *w)	1133	ev_check_start (EV_P_ struct ev_check *w)
935	{	1134	{
936	if (ev_is_active (w))	1135	if (ev_is_active (w))
937	return;	1136	return;
938		1137
939	ev_start ((W)w, ++checkcnt);	1138	ev_start (EV_A_ (W)w, ++checkcnt);
940	array_needsize (checks, checkmax, checkcnt, );	1139	array_needsize (checks, checkmax, checkcnt, );
941	checks [checkcnt - 1] = w;	1140	checks [checkcnt - 1] = w;
942	}	1141	}
943		1142
		1143	void
944	void evcheck_stop (struct ev_check *w)	1144	ev_check_stop (EV_P_ struct ev_check *w)
945	{	1145	{
946	ev_clear ((W)w);	1146	ev_clear_pending (EV_A_ (W)w);
947	if (ev_is_active (w))	1147	if (ev_is_active (w))
948	return;	1148	return;
949		1149
950	checks [w->active - 1] = checks [--checkcnt];	1150	checks [w->active - 1] = checks [--checkcnt];
951	ev_stop ((W)w);	1151	ev_stop (EV_A_ (W)w);
952	}	1152	}
953		1153
		1154	void
954	void evchild_start (struct ev_child *w)	1155	ev_child_start (EV_P_ struct ev_child *w)
955	{	1156	{
956	if (ev_is_active (w))	1157	if (ev_is_active (w))
957	return;	1158	return;
958		1159
959	ev_start ((W)w, 1);	1160	ev_start (EV_A_ (W)w, 1);
960	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1161	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
961	}	1162	}
962		1163
		1164	void
963	void evchild_stop (struct ev_child *w)	1165	ev_child_stop (EV_P_ struct ev_child *w)
964	{	1166	{
965	ev_clear ((W)w);	1167	ev_clear_pending (EV_A_ (W)w);
966	if (ev_is_active (w))	1168	if (ev_is_active (w))
967	return;	1169	return;
968		1170
969	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1171	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	ev_stop ((W)w);	1172	ev_stop (EV_A_ (W)w);
971	}	1173	}
972		1174
973	/*****************************************************************************/	1175	/*****************************************************************************/
974		1176
975	struct ev_once	1177	struct ev_once
…		…
979	void (cb)(int revents, void arg);	1181	void (cb)(int revents, void arg);
980	void *arg;	1182	void *arg;
981	};	1183	};
982		1184
983	static void	1185	static void
984	once_cb (struct ev_once *once, int revents)	1186	once_cb (EV_P_ struct ev_once *once, int revents)
985	{	1187	{
986	void (cb)(int revents, void arg) = once->cb;	1188	void (cb)(int revents, void arg) = once->cb;
987	void *arg = once->arg;	1189	void *arg = once->arg;
988		1190
989	evio_stop (&once->io);	1191	ev_io_stop (EV_A_ &once->io);
990	evtimer_stop (&once->to);	1192	ev_timer_stop (EV_A_ &once->to);
991	free (once);	1193	free (once);
992		1194
993	cb (revents, arg);	1195	cb (revents, arg);
994	}	1196	}
995		1197
996	static void	1198	static void
997	once_cb_io (struct ev_io *w, int revents)	1199	once_cb_io (EV_P_ struct ev_io *w, int revents)
998	{	1200	{
999	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1201	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1000	}	1202	}
1001		1203
1002	static void	1204	static void
1003	once_cb_to (struct ev_timer *w, int revents)	1205	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1004	{	1206	{
1005	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1207	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1006	}	1208	}
1007		1209
1008	void	1210	void
1009	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1211	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1010	{	1212	{
1011	struct ev_once *once = malloc (sizeof (struct ev_once));	1213	struct ev_once *once = malloc (sizeof (struct ev_once));
1012		1214
1013	if (!once)	1215	if (!once)
1014	cb (EV_ERROR, arg);	1216	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1015	else	1217	else
1016	{	1218	{
1017	once->cb = cb;	1219	once->cb = cb;
1018	once->arg = arg;	1220	once->arg = arg;
1019		1221
1020	evw_init (&once->io, once_cb_io);	1222	ev_watcher_init (&once->io, once_cb_io);
1021
1022	if (fd >= 0)	1223	if (fd >= 0)
1023	{	1224	{
1024	evio_set (&once->io, fd, events);	1225	ev_io_set (&once->io, fd, events);
1025	evio_start (&once->io);	1226	ev_io_start (EV_A_ &once->io);
1026	}	1227	}
1027		1228
1028	evw_init (&once->to, once_cb_to);	1229	ev_watcher_init (&once->to, once_cb_to);
1029
1030	if (timeout >= 0.)	1230	if (timeout >= 0.)
1031	{	1231	{
1032	evtimer_set (&once->to, timeout, 0.);	1232	ev_timer_set (&once->to, timeout, 0.);
1033	evtimer_start (&once->to);	1233	ev_timer_start (EV_A_ &once->to);
1034	}	1234	}
1035	}	1235	}
1036	}	1236	}
1037		1237
1038	/*****************************************************************************/	1238	/*****************************************************************************/
…		…
1049		1249
1050	static void	1250	static void
1051	ocb (struct ev_timer *w, int revents)	1251	ocb (struct ev_timer *w, int revents)
1052	{	1252	{
1053	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1253	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1054	evtimer_stop (w);	1254	ev_timer_stop (w);
1055	evtimer_start (w);	1255	ev_timer_start (w);
1056	}	1256	}
1057		1257
1058	static void	1258	static void
1059	scb (struct ev_signal *w, int revents)	1259	scb (struct ev_signal *w, int revents)
1060	{	1260	{
1061	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1261	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1062	evio_stop (&wio);	1262	ev_io_stop (&wio);
1063	evio_start (&wio);	1263	ev_io_start (&wio);
1064	}	1264	}
1065		1265
1066	static void	1266	static void
1067	gcb (struct ev_signal *w, int revents)	1267	gcb (struct ev_signal *w, int revents)
1068	{	1268	{
…		…
1072		1272
1073	int main (void)	1273	int main (void)
1074	{	1274	{
1075	ev_init (0);	1275	ev_init (0);
1076		1276
1077	evio_init (&wio, sin_cb, 0, EV_READ);	1277	ev_io_init (&wio, sin_cb, 0, EV_READ);
1078	evio_start (&wio);	1278	ev_io_start (&wio);
1079		1279
1080	struct ev_timer t[10000];	1280	struct ev_timer t[10000];
1081		1281
1082	#if 0	1282	#if 0
1083	int i;	1283	int i;
1084	for (i = 0; i < 10000; ++i)	1284	for (i = 0; i < 10000; ++i)
1085	{	1285	{
1086	struct ev_timer *w = t + i;	1286	struct ev_timer *w = t + i;
1087	evw_init (w, ocb, i);	1287	ev_watcher_init (w, ocb, i);
1088	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);	1288	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1089	evtimer_start (w);	1289	ev_timer_start (w);
1090	if (drand48 () < 0.5)	1290	if (drand48 () < 0.5)
1091	evtimer_stop (w);	1291	ev_timer_stop (w);
1092	}	1292	}
1093	#endif	1293	#endif
1094		1294
1095	struct ev_timer t1;	1295	struct ev_timer t1;
1096	evtimer_init (&t1, ocb, 5, 10);	1296	ev_timer_init (&t1, ocb, 5, 10);
1097	evtimer_start (&t1);	1297	ev_timer_start (&t1);
1098		1298
1099	struct ev_signal sig;	1299	struct ev_signal sig;
1100	evsignal_init (&sig, scb, SIGQUIT);	1300	ev_signal_init (&sig, scb, SIGQUIT);
1101	evsignal_start (&sig);	1301	ev_signal_start (&sig);
1102		1302
1103	struct ev_check cw;	1303	struct ev_check cw;
1104	evcheck_init (&cw, gcb);	1304	ev_check_init (&cw, gcb);
1105	evcheck_start (&cw);	1305	ev_check_start (&cw);
1106		1306
1107	struct ev_idle iw;	1307	struct ev_idle iw;
1108	evidle_init (&iw, gcb);	1308	ev_idle_init (&iw, gcb);
1109	evidle_start (&iw);	1309	ev_idle_start (&iw);
1110		1310
1111	ev_loop (0);	1311	ev_loop (0);
1112		1312
1113	return 0;	1313	return 0;
1114	}	1314	}

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Comparing libev/ev.c (file contents): Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs. Revision 1.53 by root, Sat Nov 3 22:31:11 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.53 by root, Sat Nov 3 22:31:11 2007 UTC