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

Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 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
		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
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		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
49	# endif	102	# endif
50	#endif	103	#endif
51		104
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	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
63		122
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	124	#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 */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		127
68	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		143
70	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
73		147
74	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77		149
78	static int have_monotonic; /* runtime */	150	#if WIN32
79		151	/* note: the comment below could not be substantiated, but what would I care */
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
81	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
82	static void (*method_poll)(ev_tstamp timeout);	154	#endif
83		155
84	/*****************************************************************************/	156	/*****************************************************************************/
85		157
86	ev_tstamp	158	typedef struct
		159	{
		160	struct ev_watcher_list *head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
		164
		165	typedef struct
		166	{
		167	W w;
		168	int events;
		169	} ANPENDING;
		170
		171	#if EV_MULTIPLICITY
		172
		173	struct ev_loop
		174	{
		175	# define VAR(name,decl) decl;
		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
		187	#endif
		188
		189	/*****************************************************************************/
		190
		191	inline ev_tstamp
87	ev_time (void)	192	ev_time (void)
88	{	193	{
89	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
90	struct timespec ts;	195	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	198	#else
94	struct timeval tv;	199	struct timeval tv;
95	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	202	#endif
98	}	203	}
99		204
100	static ev_tstamp	205	inline ev_tstamp
101	get_clock (void)	206	get_clock (void)
102	{	207	{
103	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
104	if (have_monotonic)	209	if (expect_true (have_monotonic))
105	{	210	{
106	struct timespec ts;	211	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	214	}
110	#endif	215	#endif
111		216
112	return ev_time ();	217	return ev_time ();
113	}	218	}
114		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		227
115	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
117	{ \	230	{ \
118	int newcnt = cur; \	231	int newcnt = cur; \
119	do \	232	do \
120	{ \	233	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	234	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	235	} \
123	while ((cnt) > newcnt); \	236	while ((cnt) > newcnt); \
124	\	237	\
125	base = realloc (base, sizeof (base) (newcnt)); \	238	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	240	cur = newcnt; \
128	}	241	}
129		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
130	/*****************************************************************************/	254	/*****************************************************************************/
131		255
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	256	static void
145	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
146	{	258	{
147	while (count--)	259	while (count--)
148	{	260	{
149	base->head = 0;	261	base->head = 0;
150	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
151	++base;	265	++base;
152	}	266	}
153	}	267	}
154		268
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	269	static void
165	event (W w, int events)	270	event (EV_P_ W w, int events)
166	{	271	{
167	if (w->active)	272	if (w->pending)
168	{	273	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	274	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		275	return;
173	}	276	}
174	}
175		277
		278	w->pending = ++pendingcnt [ABSPRI (w)];
		279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		280	pendings [ABSPRI (w)][w->pending - 1].w = w;
		281	pendings [ABSPRI (w)][w->pending - 1].events = events;
		282	}
		283
176	static void	284	static void
		285	queue_events (EV_P_ W *events, int eventcnt, int type)
		286	{
		287	int i;
		288
		289	for (i = 0; i < eventcnt; ++i)
		290	event (EV_A_ events [i], type);
		291	}
		292
		293	static void
177	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
178	{	295	{
179	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	297	struct ev_io *w;
181		298
182	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
183	{	300	{
184	int ev = w->events & events;	301	int ev = w->events & events;
185		302
186	if (ev)	303	if (ev)
187	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
188	}	305	}
189	}	306	}
190		307
		308	/*****************************************************************************/
		309
191	static void	310	static void
192	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
193	{	312	{
194	int i;	313	int i;
195		314
196	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	316	{
		317	int fd = fdchanges [i];
		318	ANFD *anfd = anfds + fd;
		319	struct ev_io *w;
		320
		321	int events = 0;
		322
		323	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		324	events \|= w->events;
		325
		326	anfd->reify = 0;
		327
		328	method_modify (EV_A_ fd, anfd->events, events);
		329	anfd->events = events;
		330	}
		331
		332	fdchangecnt = 0;
		333	}
		334
		335	static void
		336	fd_change (EV_P_ int fd)
		337	{
		338	if (anfds [fd].reify \|\| fdchangecnt < 0)
		339	return;
		340
		341	anfds [fd].reify = 1;
		342
		343	++fdchangecnt;
		344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		345	fdchanges [fdchangecnt - 1] = fd;
		346	}
		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		357	}
198	}	358	}
199		359
200	/* called on EBADF to verify fds */	360	/* called on EBADF to verify fds */
201	static void	361	static void
202	fd_recheck ()	362	fd_ebadf (EV_P)
203	{	363	{
204	int fd;	364	int fd;
205		365
206	for (fd = 0; fd < anfdmax; ++fd)	366	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	367	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)	369	fd_kill (EV_A_ fd);
210	evio_stop (anfds [fd].head);	370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
		380	{
		381	close (fd);
		382	fd_kill (EV_A_ fd);
		383	return;
		384	}
		385	}
		386
		387	/* susually called after fork if method needs to re-arm all fds from scratch */
		388	static void
		389	fd_rearm_all (EV_P)
		390	{
		391	int fd;
		392
		393	/* this should be highly optimised to not do anything but set a flag */
		394	for (fd = 0; fd < anfdmax; ++fd)
		395	if (anfds [fd].events)
		396	{
		397	anfds [fd].events = 0;
		398	fd_change (EV_A_ fd);
		399	}
211	}	400	}
212		401
213	/*****************************************************************************/	402	/*****************************************************************************/
214		403
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void	404	static void
222	upheap (WT *timers, int k)	405	upheap (WT *heap, int k)
223	{	406	{
224	WT w = timers [k];	407	WT w = heap [k];
225		408
226	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
227	{	410	{
228	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
229	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
230	k >>= 1;	413	k >>= 1;
231	}	414	}
232		415
233	timers [k] = w;	416	heap [k] = w;
234	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
235		418
236	}	419	}
237		420
238	static void	421	static void
239	downheap (WT *timers, int N, int k)	422	downheap (WT *heap, int N, int k)
240	{	423	{
241	WT w = timers [k];	424	WT w = heap [k];
242		425
243	while (k < (N >> 1))	426	while (k < (N >> 1))
244	{	427	{
245	int j = k << 1;	428	int j = k << 1;
246		429
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
248	++j;	431	++j;
249		432
250	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
251	break;	434	break;
252		435
253	timers [k] = timers [j];	436	heap [k] = heap [j];
254	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
255	k = j;	438	k = j;
256	}	439	}
257		440
258	timers [k] = w;	441	heap [k] = w;
259	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
260	}	443	}
261		444
262	/*****************************************************************************/	445	/*****************************************************************************/
263		446
264	typedef struct	447	typedef struct
265	{	448	{
266	struct ev_signal *head;	449	struct ev_watcher_list *head;
267	sig_atomic_t gotsig;	450	sig_atomic_t volatile gotsig;
268	} ANSIG;	451	} ANSIG;
269		452
270	static ANSIG *signals;	453	static ANSIG *signals;
271	static int signalmax;	454	static int signalmax;
272		455
273	static int sigpipe [2];	456	static int sigpipe [2];
274	static sig_atomic_t gotsig;	457	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;	458	static struct ev_io sigev;
276		459
277	static void	460	static void
278	signals_init (ANSIG *base, int count)	461	signals_init (ANSIG *base, int count)
279	{	462	{
280	while (count--)	463	while (count--)
281	{	464	{
282	base->head = 0;	465	base->head = 0;
283	base->gotsig = 0;	466	base->gotsig = 0;
		467
284	++base;	468	++base;
285	}	469	}
286	}	470	}
287		471
288	static void	472	static void
289	sighandler (int signum)	473	sighandler (int signum)
290	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
291	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
292		480
293	if (!gotsig)	481	if (!gotsig)
294	{	482	{
		483	int old_errno = errno;
295	gotsig = 1;	484	gotsig = 1;
296	write (sigpipe [1], &gotsig, 1);	485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
297	}	487	}
298	}	488	}
299		489
300	static void	490	static void
301	sigcb (struct ev_io *iow, int revents)	491	sigcb (EV_P_ struct ev_io *iow, int revents)
302	{	492	{
303	struct ev_signal *w;	493	struct ev_watcher_list *w;
304	int sig;	494	int signum;
305		495
		496	read (sigpipe [0], &revents, 1);
306	gotsig = 0;	497	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		498
309	for (sig = signalmax; sig--; )	499	for (signum = signalmax; signum--; )
310	if (signals [sig].gotsig)	500	if (signals [signum].gotsig)
311	{	501	{
312	signals [sig].gotsig = 0;	502	signals [signum].gotsig = 0;
313		503
314	for (w = signals [sig].head; w; w = w->next)	504	for (w = signals [signum].head; w; w = w->next)
315	event ((W)w, EV_SIGNAL);	505	event (EV_A_ (W)w, EV_SIGNAL);
316	}	506	}
317	}	507	}
318		508
319	static void	509	static void
320	siginit (void)	510	siginit (EV_P)
321	{	511	{
		512	#ifndef WIN32
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324		515
325	/* rather than sort out wether we really need nb, set it */	516	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
328		520
329	evio_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
331	}	524	}
332		525
333	/*****************************************************************************/	526	/*****************************************************************************/
334		527
335	static struct ev_idle **idles;	528	#ifndef WIN32
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345		529
346	static struct ev_child *childs [PID_HASHSIZE];	530	static struct ev_child *childs [PID_HASHSIZE];
347	static struct ev_signal childev;	531	static struct ev_signal childev;
348		532
349	#ifndef WCONTINUED	533	#ifndef WCONTINUED
350	# define WCONTINUED 0	534	# define WCONTINUED 0
351	#endif	535	#endif
352		536
353	static void	537	static void
354	childcb (struct ev_signal *sw, int revents)	538	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
355	{	539	{
356	struct ev_child *w;	540	struct ev_child *w;
		541
		542	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		543	if (w->pid == pid \|\| !w->pid)
		544	{
		545	ev_priority (w) = ev_priority (sw); /* need to do it now */
		546	w->rpid = pid;
		547	w->rstatus = status;
		548	event (EV_A_ (W)w, EV_CHILD);
		549	}
		550	}
		551
		552	static void
		553	childcb (EV_P_ struct ev_signal *sw, int revents)
		554	{
357	int pid, status;	555	int pid, status;
358		556
359	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	557	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	558	{
361	if (w->pid == pid \|\| w->pid == -1)	559	/* make sure we are called again until all childs have been reaped */
362	{	560	event (EV_A_ (W)sw, EV_SIGNAL);
363	w->status = status;	561
364	event ((W)w, EV_CHILD);	562	child_reap (EV_A_ sw, pid, pid, status);
365	}	563	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		564	}
366	}	565	}
		566
		567	#endif
367		568
368	/*****************************************************************************/	569	/*****************************************************************************/
369		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
370	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	575	# include "ev_epoll.c"
372	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
373	#if HAVE_SELECT	580	#if EV_USE_SELECT
374	# include "ev_select.c"	581	# include "ev_select.c"
375	#endif	582	#endif
376		583
377	int ev_init (int flags)	584	int
		585	ev_version_major (void)
378	{	586	{
		587	return EV_VERSION_MAJOR;
		588	}
		589
		590	int
		591	ev_version_minor (void)
		592	{
		593	return EV_VERSION_MINOR;
		594	}
		595
		596	/* return true if we are running with elevated privileges and should ignore env variables */
		597	static int
		598	enable_secure (void)
		599	{
		600	#ifdef WIN32
		601	return 0;
		602	#else
		603	return getuid () != geteuid ()
		604	\|\| getgid () != getegid ();
		605	#endif
		606	}
		607
		608	int
		609	ev_method (EV_P)
		610	{
		611	return method;
		612	}
		613
		614	static void
		615	loop_init (EV_P_ int methods)
		616	{
379	if (!ev_method)	617	if (!method)
380	{	618	{
381	#if HAVE_MONOTONIC	619	#if EV_USE_MONOTONIC
382	{	620	{
383	struct timespec ts;	621	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	623	have_monotonic = 1;
386	}	624	}
387	#endif	625	#endif
388		626
389	ev_now = ev_time ();	627	rt_now = ev_time ();
390	now = get_clock ();	628	mn_now = get_clock ();
		629	now_floor = mn_now;
391	diff = ev_now - now;	630	rtmn_diff = rt_now - mn_now;
392		631
		632	if (methods == EVMETHOD_AUTO)
		633	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		634	methods = atoi (getenv ("LIBEV_METHODS"));
		635	else
		636	methods = EVMETHOD_ANY;
		637
		638	method = 0;
		639	#if EV_USE_WIN32
		640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		647	#endif
		648	#if EV_USE_POLL
		649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		653	#endif
		654	}
		655	}
		656
		657	void
		658	loop_destroy (EV_P)
		659	{
		660	int i;
		661
		662	#if EV_USE_WIN32
		663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		664	#endif
		665	#if EV_USE_KQUEUE
		666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		667	#endif
		668	#if EV_USE_EPOLL
		669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		670	#endif
		671	#if EV_USE_POLL
		672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		673	#endif
		674	#if EV_USE_SELECT
		675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		676	#endif
		677
		678	for (i = NUMPRI; i--; )
		679	array_free (pending, [i]);
		680
		681	array_free (fdchange, );
		682	array_free (timer, );
		683	array_free (periodic, );
		684	array_free (idle, );
		685	array_free (prepare, );
		686	array_free (check, );
		687
		688	method = 0;
		689	/TODO/
		690	}
		691
		692	void
		693	loop_fork (EV_P)
		694	{
		695	/TODO/
		696	#if EV_USE_EPOLL
		697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		698	#endif
		699	#if EV_USE_KQUEUE
		700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		701	#endif
		702	}
		703
		704	#if EV_MULTIPLICITY
		705	struct ev_loop *
		706	ev_loop_new (int methods)
		707	{
		708	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		709
		710	loop_init (EV_A_ methods);
		711
		712	if (ev_method (EV_A))
		713	return loop;
		714
		715	return 0;
		716	}
		717
		718	void
		719	ev_loop_destroy (EV_P)
		720	{
		721	loop_destroy (EV_A);
		722	free (loop);
		723	}
		724
		725	void
		726	ev_loop_fork (EV_P)
		727	{
		728	loop_fork (EV_A);
		729	}
		730
		731	#endif
		732
		733	#if EV_MULTIPLICITY
		734	struct ev_loop default_loop_struct;
		735	static struct ev_loop *default_loop;
		736
		737	struct ev_loop *
		738	#else
		739	static int default_loop;
		740
		741	int
		742	#endif
		743	ev_default_loop (int methods)
		744	{
		745	if (sigpipe [0] == sigpipe [1])
393	if (pipe (sigpipe))	746	if (pipe (sigpipe))
394	return 0;	747	return 0;
395		748
396	ev_method = EVMETHOD_NONE;	749	if (!default_loop)
397	#if HAVE_EPOLL	750	{
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	751	#if EV_MULTIPLICITY
		752	struct ev_loop *loop = default_loop = &default_loop_struct;
		753	#else
		754	default_loop = 1;
399	#endif	755	#endif
400	#if HAVE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);
402	#endif
403		756
		757	loop_init (EV_A_ methods);
		758
404	if (ev_method)	759	if (ev_method (EV_A))
405	{	760	{
406	evw_init (&sigev, sigcb);	761	ev_watcher_init (&sigev, sigcb);
		762	ev_set_priority (&sigev, EV_MAXPRI);
407	siginit ();	763	siginit (EV_A);
408		764
		765	#ifndef WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	766	ev_signal_init (&childev, childcb, SIGCHLD);
		767	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	768	ev_signal_start (EV_A_ &childev);
		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
		770	#endif
411	}	771	}
		772	else
		773	default_loop = 0;
412	}	774	}
413		775
414	return ev_method;	776	return default_loop;
415	}	777	}
416		778
417	/*****************************************************************************/	779	void
418		780	ev_default_destroy (void)
419	void ev_prefork (void)
420	{	781	{
421	/* nop */	782	#if EV_MULTIPLICITY
422	}	783	struct ev_loop *loop = default_loop;
423
424	void ev_postfork_parent (void)
425	{
426	/* nop */
427	}
428
429	void ev_postfork_child (void)
430	{
431	#if HAVE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();
434	#endif	784	#endif
435		785
		786	ev_ref (EV_A); /* child watcher */
		787	ev_signal_stop (EV_A_ &childev);
		788
		789	ev_ref (EV_A); /* signal watcher */
436	evio_stop (&sigev);	790	ev_io_stop (EV_A_ &sigev);
		791
		792	close (sigpipe [0]); sigpipe [0] = 0;
		793	close (sigpipe [1]); sigpipe [1] = 0;
		794
		795	loop_destroy (EV_A);
		796	}
		797
		798	void
		799	ev_default_fork (void)
		800	{
		801	#if EV_MULTIPLICITY
		802	struct ev_loop *loop = default_loop;
		803	#endif
		804
		805	loop_fork (EV_A);
		806
		807	ev_io_stop (EV_A_ &sigev);
437	close (sigpipe [0]);	808	close (sigpipe [0]);
438	close (sigpipe [1]);	809	close (sigpipe [1]);
439	pipe (sigpipe);	810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
440	siginit ();	813	siginit (EV_A);
441	}	814	}
442		815
443	/*****************************************************************************/	816	/*****************************************************************************/
444		817
445	static void	818	static void
446	fd_reify (void)	819	call_pending (EV_P)
447	{	820	{
448	int i;	821	int pri;
449		822
450	for (i = 0; i < fdchangecnt; ++i)	823	for (pri = NUMPRI; pri--; )
451	{	824	while (pendingcnt [pri])
452	int fd = fdchanges [i];
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455
456	int wev = 0;
457
458	for (w = anfd->head; w; w = w->next)
459	wev \|= w->events;
460
461	if (anfd->wev != wev)
462	{	825	{
463	method_modify (fd, anfd->wev, wev);
464	anfd->wev = wev;
465	}
466	}
467
468	fdchangecnt = 0;
469	}
470
471	static void
472	call_pending ()
473	{
474	while (pendingcnt)
475	{
476	ANPENDING *p = pendings + --pendingcnt;	826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
477		827
478	if (p->w)	828	if (p->w)
479	{	829	{
480	p->w->pending = 0;	830	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	831	p->w->cb (EV_A_ p->w, p->events);
482	}	832	}
483	}	833	}
484	}	834	}
485		835
486	static void	836	static void
487	timers_reify ()	837	timers_reify (EV_P)
488	{	838	{
489	while (timercnt && timers [0]->at <= now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
490	{	840	{
491	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
492		842
493	event ((W)w, EV_TIMEOUT);	843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
494		844
495	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
496	if (w->repeat)	846	if (w->repeat)
497	{	847	{
		848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
498	w->at = now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
499	assert (("timer timeout in the past, negative repeat?", w->at > now));
500	downheap ((WT *)timers, timercnt, 0);	850	downheap ((WT *)timers, timercnt, 0);
501	}	851	}
502	else	852	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		854
		855	event (EV_A_ (W)w, EV_TIMEOUT);
		856	}
		857	}
		858
507	static void	859	static void
508	periodics_reify ()	860	periodics_reify (EV_P)
509	{	861	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
511	{	863	{
512	struct ev_periodic *w = periodics [0];	864	struct ev_periodic *w = periodics [0];
		865
		866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
513		867
514	/* first reschedule or stop timer */	868	/* first reschedule or stop timer */
515	if (w->interval)	869	if (w->interval)
516	{	870	{
517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
519	downheap ((WT *)periodics, periodiccnt, 0);	873	downheap ((WT *)periodics, periodiccnt, 0);
520	}	874	}
521	else	875	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		877
524	event ((W)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
525	}	879	}
526	}	880	}
527		881
528	static void	882	static void
529	periodics_reschedule (ev_tstamp diff)	883	periodics_reschedule (EV_P)
530	{	884	{
531	int i;	885	int i;
532		886
533	/* adjust periodics after time jump */	887	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	888	for (i = 0; i < periodiccnt; ++i)
535	{	889	{
536	struct ev_periodic *w = periodics [i];	890	struct ev_periodic *w = periodics [i];
537		891
538	if (w->interval)	892	if (w->interval)
539	{	893	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
541		895
542	if (fabs (diff) >= 1e-4)	896	if (fabs (diff) >= 1e-4)
543	{	897	{
544	evperiodic_stop (w);	898	ev_periodic_stop (EV_A_ w);
545	evperiodic_start (w);	899	ev_periodic_start (EV_A_ w);
546		900
547	i = 0; /* restart loop, inefficient, but time jumps should be rare */	901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
548	}	902	}
549	}	903	}
550	}	904	}
551	}	905	}
552		906
		907	inline int
		908	time_update_monotonic (EV_P)
		909	{
		910	mn_now = get_clock ();
		911
		912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		913	{
		914	rt_now = rtmn_diff + mn_now;
		915	return 0;
		916	}
		917	else
		918	{
		919	now_floor = mn_now;
		920	rt_now = ev_time ();
		921	return 1;
		922	}
		923	}
		924
553	static void	925	static void
554	time_update ()	926	time_update (EV_P)
555	{	927	{
556	int i;	928	int i;
557		929
558	ev_now = ev_time ();	930	#if EV_USE_MONOTONIC
559
560	if (have_monotonic)	931	if (expect_true (have_monotonic))
561	{	932	{
562	ev_tstamp odiff = diff;	933	if (time_update_monotonic (EV_A))
563
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
565	{	934	{
566	now = get_clock ();	935	ev_tstamp odiff = rtmn_diff;
		936
		937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		938	{
567	diff = ev_now - now;	939	rtmn_diff = rt_now - mn_now;
568		940
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)	941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
570	return; /* all is well */	942	return; /* all is well */
571		943
572	ev_now = ev_time ();	944	rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	}
		948
		949	periodics_reschedule (EV_A);
		950	/* no timer adjustment, as the monotonic clock doesn't jump */
		951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
573	}	952	}
574
575	periodics_reschedule (diff - odiff);
576	/* no timer adjustment, as the monotonic clock doesn't jump */
577	}	953	}
578	else	954	else
		955	#endif
579	{	956	{
580	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	957	rt_now = ev_time ();
		958
		959	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
581	{	960	{
582	periodics_reschedule (ev_now - now);	961	periodics_reschedule (EV_A);
583		962
584	/* adjust timers. this is easy, as the offset is the same for all */	963	/* adjust timers. this is easy, as the offset is the same for all */
585	for (i = 0; i < timercnt; ++i)	964	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	965	((WT)timers [i])->at += rt_now - mn_now;
587	}	966	}
588		967
589	now = ev_now;	968	mn_now = rt_now;
590	}	969	}
591	}	970	}
592		971
593	int ev_loop_done;	972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
594		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
595	void ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
596	{	988	{
597	double block;	989	double block;
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	990	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
599		991
600	do	992	do
601	{	993	{
602	/* queue check watchers (and execute them) */	994	/* queue check watchers (and execute them) */
603	if (preparecnt)	995	if (expect_false (preparecnt))
604	{	996	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	997	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	998	call_pending (EV_A);
607	}	999	}
608		1000
609	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
610	fd_reify ();	1002	fd_reify (EV_A);
611		1003
612	/* calculate blocking time */	1004	/* calculate blocking time */
613		1005
614	/* we only need this for !monotonic clockor timers, but as we basically	1006	/* we only need this for !monotonic clockor timers, but as we basically
615	always have timers, we just calculate it always */	1007	always have timers, we just calculate it always */
		1008	#if EV_USE_MONOTONIC
		1009	if (expect_true (have_monotonic))
		1010	time_update_monotonic (EV_A);
		1011	else
		1012	#endif
		1013	{
616	ev_now = ev_time ();	1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
617		1017
618	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1018	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
619	block = 0.;	1019	block = 0.;
620	else	1020	else
621	{	1021	{
622	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
623		1023
624	if (timercnt)	1024	if (timercnt)
625	{	1025	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
627	if (block > to) block = to;	1027	if (block > to) block = to;
628	}	1028	}
629		1029
630	if (periodiccnt)	1030	if (periodiccnt)
631	{	1031	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
633	if (block > to) block = to;	1033	if (block > to) block = to;
634	}	1034	}
635		1035
636	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
637	}	1037	}
638		1038
639	method_poll (block);	1039	method_poll (EV_A_ block);
640		1040
641	/* update ev_now, do magic */	1041	/* update rt_now, do magic */
642	time_update ();	1042	time_update (EV_A);
643		1043
644	/* queue pending timers and reschedule them */	1044	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	1045	timers_reify (EV_A); /* relative timers called last */
646	periodics_reify (); /* absolute timers called first */	1046	periodics_reify (EV_A); /* absolute timers called first */
647		1047
648	/* queue idle watchers unless io or timers are pending */	1048	/* queue idle watchers unless io or timers are pending */
649	if (!pendingcnt)	1049	if (!pendingcnt)
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
651		1051
652	/* queue check watchers, to be executed first */	1052	/* queue check watchers, to be executed first */
653	if (checkcnt)	1053	if (checkcnt)
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		1055
656	call_pending ();	1056	call_pending (EV_A);
657	}	1057	}
658	while (!ev_loop_done);	1058	while (activecnt && !loop_done);
659		1059
660	if (ev_loop_done != 2)	1060	if (loop_done != 2)
661	ev_loop_done = 0;	1061	loop_done = 0;
		1062	}
		1063
		1064	void
		1065	ev_unloop (EV_P_ int how)
		1066	{
		1067	loop_done = how;
662	}	1068	}
663		1069
664	/*****************************************************************************/	1070	/*****************************************************************************/
665		1071
666	static void	1072	inline void
667	wlist_add (WL *head, WL elem)	1073	wlist_add (WL *head, WL elem)
668	{	1074	{
669	elem->next = *head;	1075	elem->next = *head;
670	*head = elem;	1076	*head = elem;
671	}	1077	}
672		1078
673	static void	1079	inline void
674	wlist_del (WL *head, WL elem)	1080	wlist_del (WL *head, WL elem)
675	{	1081	{
676	while (*head)	1082	while (*head)
677	{	1083	{
678	if (*head == elem)	1084	if (*head == elem)
…		…
683		1089
684	head = &(*head)->next;	1090	head = &(*head)->next;
685	}	1091	}
686	}	1092	}
687		1093
688	static void	1094	inline void
689	ev_clear (W w)	1095	ev_clear_pending (EV_P_ W w)
690	{	1096	{
691	if (w->pending)	1097	if (w->pending)
692	{	1098	{
693	pendings [w->pending - 1].w = 0;	1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	1100	w->pending = 0;
695	}	1101	}
696	}	1102	}
697		1103
698	static void	1104	inline void
699	ev_start (W w, int active)	1105	ev_start (EV_P_ W w, int active)
700	{	1106	{
		1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1109
701	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
702	}	1112	}
703		1113
704	static void	1114	inline void
705	ev_stop (W w)	1115	ev_stop (EV_P_ W w)
706	{	1116	{
		1117	ev_unref (EV_A);
707	w->active = 0;	1118	w->active = 0;
708	}	1119	}
709		1120
710	/*****************************************************************************/	1121	/*****************************************************************************/
711		1122
712	void	1123	void
713	evio_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
714	{	1125	{
		1126	int fd = w->fd;
		1127
715	if (ev_is_active (w))	1128	if (ev_is_active (w))
716	return;	1129	return;
717		1130
718	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
719		1132
720	ev_start ((W)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		1136
724	++fdchangecnt;	1137	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	1138	}
728		1139
729	void	1140	void
730	evio_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
731	{	1142	{
732	ev_clear ((W)w);	1143	ev_clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
734	return;	1145	return;
735		1146
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	1148	ev_stop (EV_A_ (W)w);
738		1149
739	++fdchangecnt;	1150	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	1151	}
743		1152
744	void	1153	void
745	evtimer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
746	{	1155	{
747	if (ev_is_active (w))	1156	if (ev_is_active (w))
748	return;	1157	return;
749		1158
750	w->at += now;	1159	((WT)w)->at += mn_now;
751		1160
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1162
754	ev_start ((W)w, ++timercnt);	1163	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1164	array_needsize (timers, timermax, timercnt, );
756	timers [timercnt - 1] = w;	1165	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1166	upheap ((WT *)timers, timercnt - 1);
758	}
759		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
760	void	1171	void
761	evtimer_stop (struct ev_timer *w)	1172	ev_timer_stop (EV_P_ struct ev_timer *w)
762	{	1173	{
763	ev_clear ((W)w);	1174	ev_clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1175	if (!ev_is_active (w))
765	return;	1176	return;
766		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
767	if (w->active < timercnt--)	1180	if (((W)w)->active < timercnt--)
768	{	1181	{
769	timers [w->active - 1] = timers [timercnt];	1182	timers [((W)w)->active - 1] = timers [timercnt];
770	downheap ((WT *)timers, timercnt, w->active - 1);	1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
771	}	1184	}
772		1185
773	w->at = w->repeat;	1186	((WT)w)->at = w->repeat;
774		1187
775	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
776	}	1189	}
777		1190
778	void	1191	void
779	evtimer_again (struct ev_timer *w)	1192	ev_timer_again (EV_P_ struct ev_timer *w)
780	{	1193	{
781	if (ev_is_active (w))	1194	if (ev_is_active (w))
782	{	1195	{
783	if (w->repeat)	1196	if (w->repeat)
784	{	1197	{
785	w->at = now + w->repeat;	1198	((WT)w)->at = mn_now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
787	}	1200	}
788	else	1201	else
789	evtimer_stop (w);	1202	ev_timer_stop (EV_A_ w);
790	}	1203	}
791	else if (w->repeat)	1204	else if (w->repeat)
792	evtimer_start (w);	1205	ev_timer_start (EV_A_ w);
793	}	1206	}
794		1207
795	void	1208	void
796	evperiodic_start (struct ev_periodic *w)	1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
797	{	1210	{
798	if (ev_is_active (w))	1211	if (ev_is_active (w))
799	return;	1212	return;
800		1213
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
802		1215
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1216	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)	1217	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
806		1219
807	ev_start ((W)w, ++periodiccnt);	1220	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1221	array_needsize (periodics, periodicmax, periodiccnt, );
809	periodics [periodiccnt - 1] = w;	1222	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1223	upheap ((WT *)periodics, periodiccnt - 1);
811	}
812		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1226	}
		1227
813	void	1228	void
814	evperiodic_stop (struct ev_periodic *w)	1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
815	{	1230	{
816	ev_clear ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
818	return;	1233	return;
819		1234
		1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1236
820	if (w->active < periodiccnt--)	1237	if (((W)w)->active < periodiccnt--)
821	{	1238	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
824	}	1241	}
825		1242
826	ev_stop ((W)w);	1243	ev_stop (EV_A_ (W)w);
827	}	1244	}
828		1245
829	void	1246	void
830	evsignal_start (struct ev_signal *w)	1247	ev_idle_start (EV_P_ struct ev_idle *w)
831	{	1248	{
832	if (ev_is_active (w))	1249	if (ev_is_active (w))
833	return;	1250	return;
834		1251
		1252	ev_start (EV_A_ (W)w, ++idlecnt);
		1253	array_needsize (idles, idlemax, idlecnt, );
		1254	idles [idlecnt - 1] = w;
		1255	}
		1256
		1257	void
		1258	ev_idle_stop (EV_P_ struct ev_idle *w)
		1259	{
		1260	ev_clear_pending (EV_A_ (W)w);
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	idles [((W)w)->active - 1] = idles [--idlecnt];
		1265	ev_stop (EV_A_ (W)w);
		1266	}
		1267
		1268	void
		1269	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1270	{
		1271	if (ev_is_active (w))
		1272	return;
		1273
		1274	ev_start (EV_A_ (W)w, ++preparecnt);
		1275	array_needsize (prepares, preparemax, preparecnt, );
		1276	prepares [preparecnt - 1] = w;
		1277	}
		1278
		1279	void
		1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1281	{
		1282	ev_clear_pending (EV_A_ (W)w);
		1283	if (ev_is_active (w))
		1284	return;
		1285
		1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1287	ev_stop (EV_A_ (W)w);
		1288	}
		1289
		1290	void
		1291	ev_check_start (EV_P_ struct ev_check *w)
		1292	{
		1293	if (ev_is_active (w))
		1294	return;
		1295
		1296	ev_start (EV_A_ (W)w, ++checkcnt);
		1297	array_needsize (checks, checkmax, checkcnt, );
		1298	checks [checkcnt - 1] = w;
		1299	}
		1300
		1301	void
		1302	ev_check_stop (EV_P_ struct ev_check *w)
		1303	{
		1304	ev_clear_pending (EV_A_ (W)w);
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	checks [((W)w)->active - 1] = checks [--checkcnt];
		1309	ev_stop (EV_A_ (W)w);
		1310	}
		1311
		1312	#ifndef SA_RESTART
		1313	# define SA_RESTART 0
		1314	#endif
		1315
		1316	void
		1317	ev_signal_start (EV_P_ struct ev_signal *w)
		1318	{
		1319	#if EV_MULTIPLICITY
		1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1321	#endif
		1322	if (ev_is_active (w))
		1323	return;
		1324
		1325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1326
835	ev_start ((W)w, 1);	1327	ev_start (EV_A_ (W)w, 1);
836	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1330
839	if (!w->next)	1331	if (!((WL)w)->next)
840	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
841	struct sigaction sa;	1336	struct sigaction sa;
842	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
846	}	1342	}
847	}	1343	}
848		1344
849	void	1345	void
850	evsignal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
851	{	1347	{
852	ev_clear ((W)w);	1348	ev_clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
854	return;	1350	return;
855		1351
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1353	ev_stop (EV_A_ (W)w);
858		1354
859	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
861	}	1357	}
862		1358
863	void evidle_start (struct ev_idle *w)	1359	void
		1360	ev_child_start (EV_P_ struct ev_child *w)
864	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
865	if (ev_is_active (w))	1365	if (ev_is_active (w))
866	return;	1366	return;
867		1367
868	ev_start ((W)w, ++idlecnt);	1368	ev_start (EV_A_ (W)w, 1);
869	array_needsize (idles, idlemax, idlecnt, );	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
870	idles [idlecnt - 1] = w;
871	}	1370	}
872		1371
873	void evidle_stop (struct ev_idle *w)	1372	void
		1373	ev_child_stop (EV_P_ struct ev_child *w)
874	{	1374	{
875	ev_clear ((W)w);	1375	ev_clear_pending (EV_A_ (W)w);
876	if (ev_is_active (w))	1376	if (ev_is_active (w))
877	return;	1377	return;
878		1378
879	idles [w->active - 1] = idles [--idlecnt];
880	ev_stop ((W)w);
881	}
882
883	void evprepare_start (struct ev_prepare *w)
884	{
885	if (ev_is_active (w))
886	return;
887
888	ev_start ((W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );
890	prepares [preparecnt - 1] = w;
891	}
892
893	void evprepare_stop (struct ev_prepare *w)
894	{
895	ev_clear ((W)w);
896	if (ev_is_active (w))
897	return;
898
899	prepares [w->active - 1] = prepares [--preparecnt];
900	ev_stop ((W)w);
901	}
902
903	void evcheck_start (struct ev_check *w)
904	{
905	if (ev_is_active (w))
906	return;
907
908	ev_start ((W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );
910	checks [checkcnt - 1] = w;
911	}
912
913	void evcheck_stop (struct ev_check *w)
914	{
915	ev_clear ((W)w);
916	if (ev_is_active (w))
917	return;
918
919	checks [w->active - 1] = checks [--checkcnt];
920	ev_stop ((W)w);
921	}
922
923	void evchild_start (struct ev_child *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}
931
932	void evchild_stop (struct ev_child *w)
933	{
934	ev_clear ((W)w);
935	if (ev_is_active (w))
936	return;
937
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
939	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
940	}	1381	}
941		1382
942	/*****************************************************************************/	1383	/*****************************************************************************/
943		1384
944	struct ev_once	1385	struct ev_once
…		…
948	void (cb)(int revents, void arg);	1389	void (cb)(int revents, void arg);
949	void *arg;	1390	void *arg;
950	};	1391	};
951		1392
952	static void	1393	static void
953	once_cb (struct ev_once *once, int revents)	1394	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	1395	{
955	void (cb)(int revents, void arg) = once->cb;	1396	void (cb)(int revents, void arg) = once->cb;
956	void *arg = once->arg;	1397	void *arg = once->arg;
957		1398
958	evio_stop (&once->io);	1399	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	1400	ev_timer_stop (EV_A_ &once->to);
960	free (once);	1401	free (once);
961		1402
962	cb (revents, arg);	1403	cb (revents, arg);
963	}	1404	}
964		1405
965	static void	1406	static void
966	once_cb_io (struct ev_io *w, int revents)	1407	once_cb_io (EV_P_ struct ev_io *w, int revents)
967	{	1408	{
968	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1409	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
969	}	1410	}
970		1411
971	static void	1412	static void
972	once_cb_to (struct ev_timer *w, int revents)	1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)
973	{	1414	{
974	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1415	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
975	}	1416	}
976		1417
977	void	1418	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
979	{	1420	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	1421	struct ev_once *once = malloc (sizeof (struct ev_once));
981		1422
982	if (!once)	1423	if (!once)
983	cb (EV_ERROR, arg);	1424	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
984	else	1425	else
985	{	1426	{
986	once->cb = cb;	1427	once->cb = cb;
987	once->arg = arg;	1428	once->arg = arg;
988		1429
989	evw_init (&once->io, once_cb_io);	1430	ev_watcher_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	1431	if (fd >= 0)
992	{	1432	{
993	evio_set (&once->io, fd, events);	1433	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	1434	ev_io_start (EV_A_ &once->io);
995	}	1435	}
996		1436
997	evw_init (&once->to, once_cb_to);	1437	ev_watcher_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	1438	if (timeout >= 0.)
1000	{	1439	{
1001	evtimer_set (&once->to, timeout, 0.);	1440	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	1441	ev_timer_start (EV_A_ &once->to);
1003	}	1442	}
1004	}	1443	}
1005	}	1444	}
1006		1445
1007	/*****************************************************************************/
1008
1009	#if 0
1010
1011	struct ev_io wio;
1012
1013	static void
1014	sin_cb (struct ev_io *w, int revents)
1015	{
1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1017	}
1018
1019	static void
1020	ocb (struct ev_timer *w, int revents)
1021	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);
1024	evtimer_start (w);
1025	}
1026
1027	static void
1028	scb (struct ev_signal *w, int revents)
1029	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);
1032	evio_start (&wio);
1033	}
1034
1035	static void
1036	gcb (struct ev_signal *w, int revents)
1037	{
1038	fprintf (stderr, "generic %x\n", revents);
1039
1040	}
1041
1042	int main (void)
1043	{
1044	ev_init (0);
1045
1046	evio_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);
1048
1049	struct ev_timer t[10000];
1050
1051	#if 0
1052	int i;
1053	for (i = 0; i < 10000; ++i)
1054	{
1055	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);
1059	if (drand48 () < 0.5)
1060	evtimer_stop (w);
1061	}
1062	#endif
1063
1064	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);
1067
1068	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);
1071
1072	struct ev_check cw;
1073	evcheck_init (&cw, gcb);
1074	evcheck_start (&cw);
1075
1076	struct ev_idle iw;
1077	evidle_init (&iw, gcb);
1078	evidle_start (&iw);
1079
1080	ev_loop (0);
1081
1082	return 0;
1083	}
1084
1085	#endif
1086
1087
1088
1089

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Comparing libev/ev.c (file contents): Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs. Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC