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

Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 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>
…		…
36		63
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>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
41	#include <sys/time.h>	72	#include <sys/time.h>
42	#include <time.h>	73	#include <time.h>
43		74
		75	/**/
		76
44	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
45	# ifdef CLOCK_MONOTONIC
46	# 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
47	# endif	102	# endif
48	#endif	103	#endif
49		104
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
60	#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	/**/
61		122
62	#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) */
63	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		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 */
64		127
65	#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)
66		143
67	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
70		147
71	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74		149
75	static int have_monotonic; /* runtime */	150	#if WIN32
76		151	/* note: the comment below could not be substantiated, but what would I care */
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
78	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
79	static void (*method_poll)(ev_tstamp timeout);	154	#endif
80		155
81	/*****************************************************************************/	156	/*****************************************************************************/
82		157
83	ev_tstamp	158	typedef struct
		159	{
		160	WL 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
84	ev_time (void)	192	ev_time (void)
85	{	193	{
86	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
87	struct timespec ts;	195	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	198	#else
91	struct timeval tv;	199	struct timeval tv;
92	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	202	#endif
95	}	203	}
96		204
97	static ev_tstamp	205	inline ev_tstamp
98	get_clock (void)	206	get_clock (void)
99	{	207	{
100	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
101	if (have_monotonic)	209	if (expect_true (have_monotonic))
102	{	210	{
103	struct timespec ts;	211	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	214	}
107	#endif	215	#endif
108		216
109	return ev_time ();	217	return ev_time ();
110	}	218	}
111		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
112	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
114	{ \	230	{ \
115	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
		232	do \
		233	{ \
		234	newcnt = array_roundsize (base, newcnt << 1); \
		235	} \
		236	while ((cnt) > newcnt); \
		237	\
116	base = realloc (base, sizeof (base) (newcnt)); \	238	base = realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	240	cur = newcnt; \
119	}	241	}
120		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
121	/*****************************************************************************/	254	/*****************************************************************************/
122		255
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	256	static void
136	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
137	{	258	{
138	while (count--)	259	while (count--)
139	{	260	{
140	base->head = 0;	261	base->head = 0;
141	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
142	++base;	265	++base;
143	}	266	}
144	}	267	}
145		268
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void	269	static void
156	event (W w, int events)	270	event (EV_P_ W w, int events)
157	{	271	{
158	if (w->active)	272	if (w->pending)
159	{	273	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	274	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		275	return;
164	}	276	}
165	}
166		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
167	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
168	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
169	{	295	{
170	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	297	struct ev_io *w;
172		298
173	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	300	{
175	int ev = w->events & events;	301	int ev = w->events & events;
176		302
177	if (ev)	303	if (ev)
178	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
179	}	305	}
180	}	306	}
181		307
		308	/*****************************************************************************/
		309
182	static void	310	static void
183	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
184	{	312	{
185	int i;	313	int i;
186		314
187	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
188	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	}
189	}	358	}
190		359
191	/* called on EBADF to verify fds */	360	/* called on EBADF to verify fds */
192	static void	361	static void
193	fd_recheck ()	362	fd_ebadf (EV_P)
194	{	363	{
195	int fd;	364	int fd;
196		365
197	for (fd = 0; fd < anfdmax; ++fd)	366	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	367	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	369	fd_kill (EV_A_ fd);
201	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	fd_kill (EV_A_ fd);
		382	return;
		383	}
		384	}
		385
		386	/* susually called after fork if method needs to re-arm all fds from scratch */
		387	static void
		388	fd_rearm_all (EV_P)
		389	{
		390	int fd;
		391
		392	/* this should be highly optimised to not do anything but set a flag */
		393	for (fd = 0; fd < anfdmax; ++fd)
		394	if (anfds [fd].events)
		395	{
		396	anfds [fd].events = 0;
		397	fd_change (EV_A_ fd);
		398	}
202	}	399	}
203		400
204	/*****************************************************************************/	401	/*****************************************************************************/
205		402
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	403	static void
213	upheap (WT *timers, int k)	404	upheap (WT *heap, int k)
214	{	405	{
215	WT w = timers [k];	406	WT w = heap [k];
216		407
217	while (k && timers [k >> 1]->at > w->at)	408	while (k && heap [k >> 1]->at > w->at)
218	{	409	{
219	timers [k] = timers [k >> 1];	410	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	411	((W)heap [k])->active = k + 1;
221	k >>= 1;	412	k >>= 1;
222	}	413	}
223		414
224	timers [k] = w;	415	heap [k] = w;
225	timers [k]->active = k + 1;	416	((W)heap [k])->active = k + 1;
226		417
227	}	418	}
228		419
229	static void	420	static void
230	downheap (WT *timers, int N, int k)	421	downheap (WT *heap, int N, int k)
231	{	422	{
232	WT w = timers [k];	423	WT w = heap [k];
233		424
234	while (k < (N >> 1))	425	while (k < (N >> 1))
235	{	426	{
236	int j = k << 1;	427	int j = k << 1;
237		428
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	430	++j;
240		431
241	if (w->at <= timers [j]->at)	432	if (w->at <= heap [j]->at)
242	break;	433	break;
243		434
244	timers [k] = timers [j];	435	heap [k] = heap [j];
245	timers [k]->active = k + 1;	436	((W)heap [k])->active = k + 1;
246	k = j;	437	k = j;
247	}	438	}
248		439
249	timers [k] = w;	440	heap [k] = w;
250	timers [k]->active = k + 1;	441	((W)heap [k])->active = k + 1;
251	}	442	}
252		443
253	/*****************************************************************************/	444	/*****************************************************************************/
254		445
255	typedef struct	446	typedef struct
256	{	447	{
257	struct ev_signal *head;	448	WL head;
258	sig_atomic_t gotsig;	449	sig_atomic_t volatile gotsig;
259	} ANSIG;	450	} ANSIG;
260		451
261	static ANSIG *signals;	452	static ANSIG *signals;
262	static int signalmax;	453	static int signalmax;
263		454
264	static int sigpipe [2];	455	static int sigpipe [2];
265	static sig_atomic_t gotsig;	456	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	457	static struct ev_io sigev;
267		458
268	static void	459	static void
269	signals_init (ANSIG *base, int count)	460	signals_init (ANSIG *base, int count)
270	{	461	{
271	while (count--)	462	while (count--)
272	{	463	{
273	base->head = 0;	464	base->head = 0;
274	base->gotsig = 0;	465	base->gotsig = 0;
		466
275	++base;	467	++base;
276	}	468	}
277	}	469	}
278		470
279	static void	471	static void
280	sighandler (int signum)	472	sighandler (int signum)
281	{	473	{
		474	#if WIN32
		475	signal (signum, sighandler);
		476	#endif
		477
282	signals [signum - 1].gotsig = 1;	478	signals [signum - 1].gotsig = 1;
283		479
284	if (!gotsig)	480	if (!gotsig)
285	{	481	{
		482	int old_errno = errno;
286	gotsig = 1;	483	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	484	write (sigpipe [1], &signum, 1);
		485	errno = old_errno;
288	}	486	}
289	}	487	}
290		488
291	static void	489	static void
292	sigcb (struct ev_io *iow, int revents)	490	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	491	{
294	struct ev_signal *w;	492	WL w;
295	int sig;	493	int signum;
296		494
		495	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	496	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		497
300	for (sig = signalmax; sig--; )	498	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	499	if (signals [signum].gotsig)
302	{	500	{
303	signals [sig].gotsig = 0;	501	signals [signum].gotsig = 0;
304		502
305	for (w = signals [sig].head; w; w = w->next)	503	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	504	event (EV_A_ (W)w, EV_SIGNAL);
307	}	505	}
308	}	506	}
309		507
310	static void	508	static void
311	siginit (void)	509	siginit (EV_P)
312	{	510	{
		511	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	512	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		514
316	/* rather than sort out wether we really need nb, set it */	515	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		518	#endif
319		519
320	evio_set (&sigev, sigpipe [0], EV_READ);	520	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	521	ev_io_start (EV_A_ &sigev);
		522	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	523	}
323		524
324	/*****************************************************************************/	525	/*****************************************************************************/
325		526
326	static struct ev_idle **idles;	527	#ifndef WIN32
327	static int idlemax, idlecnt;
328		528
329	static struct ev_check **checks;	529	static struct ev_child *childs [PID_HASHSIZE];
330	static int checkmax, checkcnt;	530	static struct ev_signal childev;
		531
		532	#ifndef WCONTINUED
		533	# define WCONTINUED 0
		534	#endif
		535
		536	static void
		537	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		538	{
		539	struct ev_child *w;
		540
		541	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		542	if (w->pid == pid \|\| !w->pid)
		543	{
		544	ev_priority (w) = ev_priority (sw); /* need to do it now */
		545	w->rpid = pid;
		546	w->rstatus = status;
		547	event (EV_A_ (W)w, EV_CHILD);
		548	}
		549	}
		550
		551	static void
		552	childcb (EV_P_ struct ev_signal *sw, int revents)
		553	{
		554	int pid, status;
		555
		556	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		557	{
		558	/* make sure we are called again until all childs have been reaped */
		559	event (EV_A_ (W)sw, EV_SIGNAL);
		560
		561	child_reap (EV_A_ sw, pid, pid, status);
		562	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		563	}
		564	}
		565
		566	#endif
331		567
332	/*****************************************************************************/	568	/*****************************************************************************/
333		569
		570	#if EV_USE_KQUEUE
		571	# include "ev_kqueue.c"
		572	#endif
334	#if HAVE_EPOLL	573	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	574	# include "ev_epoll.c"
336	#endif	575	#endif
		576	#if EV_USE_POLL
		577	# include "ev_poll.c"
		578	#endif
337	#if HAVE_SELECT	579	#if EV_USE_SELECT
338	# include "ev_select.c"	580	# include "ev_select.c"
339	#endif	581	#endif
340		582
341	int ev_init (int flags)	583	int
		584	ev_version_major (void)
342	{	585	{
		586	return EV_VERSION_MAJOR;
		587	}
		588
		589	int
		590	ev_version_minor (void)
		591	{
		592	return EV_VERSION_MINOR;
		593	}
		594
		595	/* return true if we are running with elevated privileges and should ignore env variables */
		596	static int
		597	enable_secure (void)
		598	{
		599	#ifdef WIN32
		600	return 0;
		601	#else
		602	return getuid () != geteuid ()
		603	\|\| getgid () != getegid ();
		604	#endif
		605	}
		606
		607	int
		608	ev_method (EV_P)
		609	{
		610	return method;
		611	}
		612
		613	static void
		614	loop_init (EV_P_ int methods)
		615	{
		616	if (!method)
		617	{
343	#if HAVE_MONOTONIC	618	#if EV_USE_MONOTONIC
344	{	619	{
345	struct timespec ts;	620	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	621	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	622	have_monotonic = 1;
348	}	623	}
349	#endif	624	#endif
350		625
351	ev_now = ev_time ();	626	rt_now = ev_time ();
352	now = get_clock ();	627	mn_now = get_clock ();
353	diff = ev_now - now;	628	now_floor = mn_now;
		629	rtmn_diff = rt_now - mn_now;
354		630
		631	if (methods == EVMETHOD_AUTO)
		632	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		633	methods = atoi (getenv ("LIBEV_METHODS"));
		634	else
		635	methods = EVMETHOD_ANY;
		636
		637	method = 0;
		638	#if EV_USE_WIN32
		639	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		640	#endif
		641	#if EV_USE_KQUEUE
		642	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		643	#endif
		644	#if EV_USE_EPOLL
		645	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		646	#endif
		647	#if EV_USE_POLL
		648	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		649	#endif
		650	#if EV_USE_SELECT
		651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		652	#endif
		653	}
		654	}
		655
		656	void
		657	loop_destroy (EV_P)
		658	{
		659	int i;
		660
		661	#if EV_USE_WIN32
		662	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		663	#endif
		664	#if EV_USE_KQUEUE
		665	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		666	#endif
		667	#if EV_USE_EPOLL
		668	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		669	#endif
		670	#if EV_USE_POLL
		671	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		672	#endif
		673	#if EV_USE_SELECT
		674	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		675	#endif
		676
		677	for (i = NUMPRI; i--; )
		678	array_free (pending, [i]);
		679
		680	array_free (fdchange, );
		681	array_free (timer, );
		682	array_free (periodic, );
		683	array_free (idle, );
		684	array_free (prepare, );
		685	array_free (check, );
		686
		687	method = 0;
		688	/TODO/
		689	}
		690
		691	void
		692	loop_fork (EV_P)
		693	{
		694	/TODO/
		695	#if EV_USE_EPOLL
		696	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		697	#endif
		698	#if EV_USE_KQUEUE
		699	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		700	#endif
		701	}
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop *
		705	ev_loop_new (int methods)
		706	{
		707	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		708
		709	loop_init (EV_A_ methods);
		710
		711	if (ev_method (EV_A))
		712	return loop;
		713
		714	return 0;
		715	}
		716
		717	void
		718	ev_loop_destroy (EV_P)
		719	{
		720	loop_destroy (EV_A);
		721	free (loop);
		722	}
		723
		724	void
		725	ev_loop_fork (EV_P)
		726	{
		727	loop_fork (EV_A);
		728	}
		729
		730	#endif
		731
		732	#if EV_MULTIPLICITY
		733	struct ev_loop default_loop_struct;
		734	static struct ev_loop *default_loop;
		735
		736	struct ev_loop *
		737	#else
		738	static int default_loop;
		739
		740	int
		741	#endif
		742	ev_default_loop (int methods)
		743	{
		744	if (sigpipe [0] == sigpipe [1])
355	if (pipe (sigpipe))	745	if (pipe (sigpipe))
356	return 0;	746	return 0;
357		747
358	ev_method = EVMETHOD_NONE;	748	if (!default_loop)
359	#if HAVE_EPOLL
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
361	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365
366	if (ev_method)
367	{	749	{
		750	#if EV_MULTIPLICITY
		751	struct ev_loop *loop = default_loop = &default_loop_struct;
		752	#else
		753	default_loop = 1;
		754	#endif
		755
		756	loop_init (EV_A_ methods);
		757
		758	if (ev_method (EV_A))
		759	{
368	evw_init (&sigev, sigcb);	760	ev_watcher_init (&sigev, sigcb);
		761	ev_set_priority (&sigev, EV_MAXPRI);
369	siginit ();	762	siginit (EV_A);
370	}
371		763
372	return ev_method;	764	#ifndef WIN32
373	}	765	ev_signal_init (&childev, childcb, SIGCHLD);
374		766	ev_set_priority (&childev, EV_MAXPRI);
375	/*****************************************************************************/	767	ev_signal_start (EV_A_ &childev);
376		768	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	void ev_prefork (void)
378	{
379	/* nop */
380	}
381
382	void ev_postfork_parent (void)
383	{
384	/* nop */
385	}
386
387	void ev_postfork_child (void)
388	{
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();
392	#endif	769	#endif
		770	}
		771	else
		772	default_loop = 0;
		773	}
393		774
		775	return default_loop;
		776	}
		777
		778	void
		779	ev_default_destroy (void)
		780	{
		781	#if EV_MULTIPLICITY
		782	struct ev_loop *loop = default_loop;
		783	#endif
		784
		785	ev_ref (EV_A); /* child watcher */
		786	ev_signal_stop (EV_A_ &childev);
		787
		788	ev_ref (EV_A); /* signal watcher */
394	evio_stop (&sigev);	789	ev_io_stop (EV_A_ &sigev);
		790
		791	close (sigpipe [0]); sigpipe [0] = 0;
		792	close (sigpipe [1]); sigpipe [1] = 0;
		793
		794	loop_destroy (EV_A);
		795	}
		796
		797	void
		798	ev_default_fork (void)
		799	{
		800	#if EV_MULTIPLICITY
		801	struct ev_loop *loop = default_loop;
		802	#endif
		803
		804	loop_fork (EV_A);
		805
		806	ev_io_stop (EV_A_ &sigev);
395	close (sigpipe [0]);	807	close (sigpipe [0]);
396	close (sigpipe [1]);	808	close (sigpipe [1]);
397	pipe (sigpipe);	809	pipe (sigpipe);
		810
		811	ev_ref (EV_A); /* signal watcher */
398	siginit ();	812	siginit (EV_A);
399	}	813	}
400		814
401	/*****************************************************************************/	815	/*****************************************************************************/
402		816
403	static void	817	static void
404	fd_reify (void)	818	call_pending (EV_P)
405	{	819	{
406	int i;	820	int pri;
407		821
408	for (i = 0; i < fdchangecnt; ++i)	822	for (pri = NUMPRI; pri--; )
409	{	823	while (pendingcnt [pri])
410	int fd = fdchanges [i];
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413
414	int wev = 0;
415
416	for (w = anfd->head; w; w = w->next)
417	wev \|= w->events;
418
419	if (anfd->wev != wev)
420	{	824	{
421	method_modify (fd, anfd->wev, wev);
422	anfd->wev = wev;
423	}
424	}
425
426	fdchangecnt = 0;
427	}
428
429	static void
430	call_pending ()
431	{
432	while (pendingcnt)
433	{
434	ANPENDING *p = pendings + --pendingcnt;	825	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		826
436	if (p->w)	827	if (p->w)
437	{	828	{
438	p->w->pending = 0;	829	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	830	p->w->cb (EV_A_ p->w, p->events);
440	}	831	}
441	}	832	}
442	}	833	}
443		834
444	static void	835	static void
445	timers_reify ()	836	timers_reify (EV_P)
446	{	837	{
447	while (timercnt && timers [0]->at <= now)	838	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	839	{
449	struct ev_timer *w = timers [0];	840	struct ev_timer *w = timers [0];
450		841
451	event ((W)w, EV_TIMEOUT);	842	assert (("inactive timer on timer heap detected", ev_is_active (w)));
452		843
453	/* first reschedule or stop timer */	844	/* first reschedule or stop timer */
454	if (w->repeat)	845	if (w->repeat)
455	{	846	{
		847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	848	((WT)w)->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	849	downheap ((WT *)timers, timercnt, 0);
459	}	850	}
460	else	851	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		853
		854	event (EV_A_ (W)w, EV_TIMEOUT);
		855	}
		856	}
		857
465	static void	858	static void
466	periodics_reify ()	859	periodics_reify (EV_P)
467	{	860	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
469	{	862	{
470	struct ev_periodic *w = periodics [0];	863	struct ev_periodic *w = periodics [0];
		864
		865	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
471		866
472	/* first reschedule or stop timer */	867	/* first reschedule or stop timer */
473	if (w->interval)	868	if (w->interval)
474	{	869	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	870	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
476	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	871	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	872	downheap ((WT *)periodics, periodiccnt, 0);
478	}	873	}
479	else	874	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		876
482	event ((W)w, EV_TIMEOUT);	877	event (EV_A_ (W)w, EV_PERIODIC);
483	}	878	}
484	}	879	}
485		880
486	static void	881	static void
487	periodics_reschedule (ev_tstamp diff)	882	periodics_reschedule (EV_P)
488	{	883	{
489	int i;	884	int i;
490		885
491	/* adjust periodics after time jump */	886	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	887	for (i = 0; i < periodiccnt; ++i)
493	{	888	{
494	struct ev_periodic *w = periodics [i];	889	struct ev_periodic *w = periodics [i];
495		890
496	if (w->interval)	891	if (w->interval)
497	{	892	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	893	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
499		894
500	if (fabs (diff) >= 1e-4)	895	if (fabs (diff) >= 1e-4)
501	{	896	{
502	evperiodic_stop (w);	897	ev_periodic_stop (EV_A_ w);
503	evperiodic_start (w);	898	ev_periodic_start (EV_A_ w);
504		899
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	900	i = 0; /* restart loop, inefficient, but time jumps should be rare */
506	}	901	}
507	}	902	}
508	}	903	}
509	}	904	}
510		905
		906	inline int
		907	time_update_monotonic (EV_P)
		908	{
		909	mn_now = get_clock ();
		910
		911	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		912	{
		913	rt_now = rtmn_diff + mn_now;
		914	return 0;
		915	}
		916	else
		917	{
		918	now_floor = mn_now;
		919	rt_now = ev_time ();
		920	return 1;
		921	}
		922	}
		923
511	static void	924	static void
512	time_update ()	925	time_update (EV_P)
513	{	926	{
514	int i;	927	int i;
515		928
516	ev_now = ev_time ();	929	#if EV_USE_MONOTONIC
517
518	if (have_monotonic)	930	if (expect_true (have_monotonic))
519	{	931	{
520	ev_tstamp odiff = diff;	932	if (time_update_monotonic (EV_A))
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	933	{
524	now = get_clock ();	934	ev_tstamp odiff = rtmn_diff;
		935
		936	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		937	{
525	diff = ev_now - now;	938	rtmn_diff = rt_now - mn_now;
526		939
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)	940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
528	return; /* all is well */	941	return; /* all is well */
529		942
530	ev_now = ev_time ();	943	rt_now = ev_time ();
		944	mn_now = get_clock ();
		945	now_floor = mn_now;
		946	}
		947
		948	periodics_reschedule (EV_A);
		949	/* no timer adjustment, as the monotonic clock doesn't jump */
		950	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
531	}	951	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}	952	}
536	else	953	else
		954	#endif
537	{	955	{
538	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	956	rt_now = ev_time ();
		957
		958	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
539	{	959	{
540	periodics_reschedule (ev_now - now);	960	periodics_reschedule (EV_A);
541		961
542	/* adjust timers. this is easy, as the offset is the same for all */	962	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	963	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	964	((WT)timers [i])->at += rt_now - mn_now;
545	}	965	}
546		966
547	now = ev_now;	967	mn_now = rt_now;
548	}	968	}
549	}	969	}
550		970
551	int ev_loop_done;	971	void
		972	ev_ref (EV_P)
		973	{
		974	++activecnt;
		975	}
552		976
		977	void
		978	ev_unref (EV_P)
		979	{
		980	--activecnt;
		981	}
		982
		983	static int loop_done;
		984
		985	void
553	void ev_loop (int flags)	986	ev_loop (EV_P_ int flags)
554	{	987	{
555	double block;	988	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	989	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
557
558	if (checkcnt)
559	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);
561	call_pending ();
562	}
563		990
564	do	991	do
565	{	992	{
		993	/* queue check watchers (and execute them) */
		994	if (expect_false (preparecnt))
		995	{
		996	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		997	call_pending (EV_A);
		998	}
		999
566	/* update fd-related kernel structures */	1000	/* update fd-related kernel structures */
567	fd_reify ();	1001	fd_reify (EV_A);
568		1002
569	/* calculate blocking time */	1003	/* calculate blocking time */
570		1004
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1005	/* we only need this for !monotonic clockor timers, but as we basically
		1006	always have timers, we just calculate it always */
		1007	#if EV_USE_MONOTONIC
		1008	if (expect_true (have_monotonic))
		1009	time_update_monotonic (EV_A);
		1010	else
		1011	#endif
		1012	{
572	ev_now = ev_time ();	1013	rt_now = ev_time ();
		1014	mn_now = rt_now;
		1015	}
573		1016
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1017	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	1018	block = 0.;
576	else	1019	else
577	{	1020	{
578	block = MAX_BLOCKTIME;	1021	block = MAX_BLOCKTIME;
579		1022
580	if (timercnt)	1023	if (timercnt)
581	{	1024	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1025	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
583	if (block > to) block = to;	1026	if (block > to) block = to;
584	}	1027	}
585		1028
586	if (periodiccnt)	1029	if (periodiccnt)
587	{	1030	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
589	if (block > to) block = to;	1032	if (block > to) block = to;
590	}	1033	}
591		1034
592	if (block < 0.) block = 0.;	1035	if (block < 0.) block = 0.;
593	}	1036	}
594		1037
595	method_poll (block);	1038	method_poll (EV_A_ block);
596		1039
597	/* update ev_now, do magic */	1040	/* update rt_now, do magic */
598	time_update ();	1041	time_update (EV_A);
599		1042
600	/* queue pending timers and reschedule them */	1043	/* queue pending timers and reschedule them */
		1044	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	1045	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		1046
604	/* queue idle watchers unless io or timers are pending */	1047	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1048	if (!pendingcnt)
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1049	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1050
608	/* queue check and possibly idle watchers */	1051	/* queue check watchers, to be executed first */
		1052	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1053	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1054
611	call_pending ();	1055	call_pending (EV_A);
612	}	1056	}
613	while (!ev_loop_done);	1057	while (activecnt && !loop_done);
614		1058
615	if (ev_loop_done != 2)	1059	if (loop_done != 2)
616	ev_loop_done = 0;	1060	loop_done = 0;
		1061	}
		1062
		1063	void
		1064	ev_unloop (EV_P_ int how)
		1065	{
		1066	loop_done = how;
617	}	1067	}
618		1068
619	/*****************************************************************************/	1069	/*****************************************************************************/
620		1070
621	static void	1071	inline void
622	wlist_add (WL *head, WL elem)	1072	wlist_add (WL *head, WL elem)
623	{	1073	{
624	elem->next = *head;	1074	elem->next = *head;
625	*head = elem;	1075	*head = elem;
626	}	1076	}
627		1077
628	static void	1078	inline void
629	wlist_del (WL *head, WL elem)	1079	wlist_del (WL *head, WL elem)
630	{	1080	{
631	while (*head)	1081	while (*head)
632	{	1082	{
633	if (*head == elem)	1083	if (*head == elem)
…		…
638		1088
639	head = &(*head)->next;	1089	head = &(*head)->next;
640	}	1090	}
641	}	1091	}
642		1092
643	static void	1093	inline void
644	ev_clear (W w)	1094	ev_clear_pending (EV_P_ W w)
645	{	1095	{
646	if (w->pending)	1096	if (w->pending)
647	{	1097	{
648	pendings [w->pending - 1].w = 0;	1098	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1099	w->pending = 0;
650	}	1100	}
651	}	1101	}
652		1102
653	static void	1103	inline void
654	ev_start (W w, int active)	1104	ev_start (EV_P_ W w, int active)
655	{	1105	{
		1106	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1107	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1108
656	w->active = active;	1109	w->active = active;
		1110	ev_ref (EV_A);
657	}	1111	}
658		1112
659	static void	1113	inline void
660	ev_stop (W w)	1114	ev_stop (EV_P_ W w)
661	{	1115	{
		1116	ev_unref (EV_A);
662	w->active = 0;	1117	w->active = 0;
663	}	1118	}
664		1119
665	/*****************************************************************************/	1120	/*****************************************************************************/
666		1121
667	void	1122	void
668	evio_start (struct ev_io *w)	1123	ev_io_start (EV_P_ struct ev_io *w)
669	{	1124	{
		1125	int fd = w->fd;
		1126
670	if (ev_is_active (w))	1127	if (ev_is_active (w))
671	return;	1128	return;
672		1129
673	int fd = w->fd;	1130	assert (("ev_io_start called with negative fd", fd >= 0));
674		1131
675	ev_start ((W)w, 1);	1132	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1133	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1134	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1135
679	++fdchangecnt;	1136	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1137	}
683		1138
684	void	1139	void
685	evio_stop (struct ev_io *w)	1140	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1141	{
687	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
689	return;	1144	return;
690		1145
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1146	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
693		1148
694	++fdchangecnt;	1149	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1150	}
698		1151
699	void	1152	void
700	evtimer_start (struct ev_timer *w)	1153	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1154	{
702	if (ev_is_active (w))	1155	if (ev_is_active (w))
703	return;	1156	return;
704		1157
705	w->at += now;	1158	((WT)w)->at += mn_now;
706		1159
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1160	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1161
709	ev_start ((W)w, ++timercnt);	1162	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1163	array_needsize (timers, timermax, timercnt, );
711	timers [timercnt - 1] = w;	1164	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1165	upheap ((WT *)timers, timercnt - 1);
713	}
714		1166
		1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1168	}
		1169
715	void	1170	void
716	evtimer_stop (struct ev_timer *w)	1171	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1172	{
718	ev_clear ((W)w);	1173	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1174	if (!ev_is_active (w))
720	return;	1175	return;
721		1176
		1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1178
722	if (w->active < timercnt--)	1179	if (((W)w)->active < timercnt--)
723	{	1180	{
724	timers [w->active - 1] = timers [timercnt];	1181	timers [((W)w)->active - 1] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
726	}	1183	}
727		1184
728	w->at = w->repeat;	1185	((WT)w)->at = w->repeat;
729		1186
730	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
731	}	1188	}
732		1189
733	void	1190	void
734	evtimer_again (struct ev_timer *w)	1191	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1192	{
736	if (ev_is_active (w))	1193	if (ev_is_active (w))
737	{	1194	{
738	if (w->repeat)	1195	if (w->repeat)
739	{	1196	{
740	w->at = now + w->repeat;	1197	((WT)w)->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
742	}	1199	}
743	else	1200	else
744	evtimer_stop (w);	1201	ev_timer_stop (EV_A_ w);
745	}	1202	}
746	else if (w->repeat)	1203	else if (w->repeat)
747	evtimer_start (w);	1204	ev_timer_start (EV_A_ w);
748	}	1205	}
749		1206
750	void	1207	void
751	evperiodic_start (struct ev_periodic *w)	1208	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1209	{
753	if (ev_is_active (w))	1210	if (ev_is_active (w))
754	return;	1211	return;
755		1212
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1213	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
757		1214
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1215	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)	1216	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1217	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
761		1218
762	ev_start ((W)w, ++periodiccnt);	1219	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1220	array_needsize (periodics, periodicmax, periodiccnt, );
764	periodics [periodiccnt - 1] = w;	1221	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1222	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1223
		1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1225	}
		1226
768	void	1227	void
769	evperiodic_stop (struct ev_periodic *w)	1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1229	{
771	ev_clear ((W)w);	1230	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1231	if (!ev_is_active (w))
773	return;	1232	return;
774		1233
		1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1235
775	if (w->active < periodiccnt--)	1236	if (((W)w)->active < periodiccnt--)
776	{	1237	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
779	}	1240	}
780		1241
781	ev_stop ((W)w);	1242	ev_stop (EV_A_ (W)w);
782	}	1243	}
783		1244
784	void	1245	void
785	evsignal_start (struct ev_signal *w)	1246	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1247	{
787	if (ev_is_active (w))	1248	if (ev_is_active (w))
788	return;	1249	return;
789		1250
		1251	ev_start (EV_A_ (W)w, ++idlecnt);
		1252	array_needsize (idles, idlemax, idlecnt, );
		1253	idles [idlecnt - 1] = w;
		1254	}
		1255
		1256	void
		1257	ev_idle_stop (EV_P_ struct ev_idle *w)
		1258	{
		1259	ev_clear_pending (EV_A_ (W)w);
		1260	if (ev_is_active (w))
		1261	return;
		1262
		1263	idles [((W)w)->active - 1] = idles [--idlecnt];
		1264	ev_stop (EV_A_ (W)w);
		1265	}
		1266
		1267	void
		1268	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1269	{
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	ev_start (EV_A_ (W)w, ++preparecnt);
		1274	array_needsize (prepares, preparemax, preparecnt, );
		1275	prepares [preparecnt - 1] = w;
		1276	}
		1277
		1278	void
		1279	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1280	{
		1281	ev_clear_pending (EV_A_ (W)w);
		1282	if (ev_is_active (w))
		1283	return;
		1284
		1285	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1286	ev_stop (EV_A_ (W)w);
		1287	}
		1288
		1289	void
		1290	ev_check_start (EV_P_ struct ev_check *w)
		1291	{
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	ev_start (EV_A_ (W)w, ++checkcnt);
		1296	array_needsize (checks, checkmax, checkcnt, );
		1297	checks [checkcnt - 1] = w;
		1298	}
		1299
		1300	void
		1301	ev_check_stop (EV_P_ struct ev_check *w)
		1302	{
		1303	ev_clear_pending (EV_A_ (W)w);
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	checks [((W)w)->active - 1] = checks [--checkcnt];
		1308	ev_stop (EV_A_ (W)w);
		1309	}
		1310
		1311	#ifndef SA_RESTART
		1312	# define SA_RESTART 0
		1313	#endif
		1314
		1315	void
		1316	ev_signal_start (EV_P_ struct ev_signal *w)
		1317	{
		1318	#if EV_MULTIPLICITY
		1319	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1320	#endif
		1321	if (ev_is_active (w))
		1322	return;
		1323
		1324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1325
790	ev_start ((W)w, 1);	1326	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1327	array_needsize (signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1329
794	if (!w->next)	1330	if (!((WL)w)->next)
795	{	1331	{
		1332	#if WIN32
		1333	signal (w->signum, sighandler);
		1334	#else
796	struct sigaction sa;	1335	struct sigaction sa;
797	sa.sa_handler = sighandler;	1336	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1337	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1339	sigaction (w->signum, &sa, 0);
		1340	#endif
801	}	1341	}
802	}	1342	}
803		1343
804	void	1344	void
805	evsignal_stop (struct ev_signal *w)	1345	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1346	{
807	ev_clear ((W)w);	1347	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1348	if (!ev_is_active (w))
809	return;	1349	return;
810		1350
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1351	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1352	ev_stop (EV_A_ (W)w);
813		1353
814	if (!signals [w->signum - 1].head)	1354	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1355	signal (w->signum, SIG_DFL);
816	}	1356	}
817		1357
818	void evidle_start (struct ev_idle *w)	1358	void
		1359	ev_child_start (EV_P_ struct ev_child *w)
819	{	1360	{
		1361	#if EV_MULTIPLICITY
		1362	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1363	#endif
820	if (ev_is_active (w))	1364	if (ev_is_active (w))
821	return;	1365	return;
822		1366
823	ev_start ((W)w, ++idlecnt);	1367	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1369	}
827		1370
828	void evidle_stop (struct ev_idle *w)	1371	void
		1372	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1373	{
830	ev_clear ((W)w);	1374	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1375	if (ev_is_active (w))
832	return;	1376	return;
833		1377
834	idles [w->active - 1] = idles [--idlecnt];	1378	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1379	ev_stop (EV_A_ (W)w);
836	}
837
838	void evcheck_start (struct ev_check *w)
839	{
840	if (ev_is_active (w))
841	return;
842
843	ev_start ((W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );
845	checks [checkcnt - 1] = w;
846	}
847
848	void evcheck_stop (struct ev_check *w)
849	{
850	ev_clear ((W)w);
851	if (ev_is_active (w))
852	return;
853
854	checks [w->active - 1] = checks [--checkcnt];
855	ev_stop ((W)w);
856	}	1380	}
857		1381
858	/*****************************************************************************/	1382	/*****************************************************************************/
859		1383
860	struct ev_once	1384	struct ev_once
…		…
864	void (cb)(int revents, void arg);	1388	void (cb)(int revents, void arg);
865	void *arg;	1389	void *arg;
866	};	1390	};
867		1391
868	static void	1392	static void
869	once_cb (struct ev_once *once, int revents)	1393	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1394	{
871	void (cb)(int revents, void arg) = once->cb;	1395	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	1396	void *arg = once->arg;
873		1397
874	evio_stop (&once->io);	1398	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1399	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1400	free (once);
877		1401
878	cb (revents, arg);	1402	cb (revents, arg);
879	}	1403	}
880		1404
881	static void	1405	static void
882	once_cb_io (struct ev_io *w, int revents)	1406	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1407	{
884	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1408	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
885	}	1409	}
886		1410
887	static void	1411	static void
888	once_cb_to (struct ev_timer *w, int revents)	1412	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1413	{
890	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1414	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
891	}	1415	}
892		1416
893	void	1417	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1418	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
895	{	1419	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1420	struct ev_once *once = malloc (sizeof (struct ev_once));
897		1421
898	if (!once)	1422	if (!once)
899	cb (EV_ERROR, arg);	1423	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
900	else	1424	else
901	{	1425	{
902	once->cb = cb;	1426	once->cb = cb;
903	once->arg = arg;	1427	once->arg = arg;
904		1428
905	evw_init (&once->io, once_cb_io);	1429	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1430	if (fd >= 0)
908	{	1431	{
909	evio_set (&once->io, fd, events);	1432	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1433	ev_io_start (EV_A_ &once->io);
911	}	1434	}
912		1435
913	evw_init (&once->to, once_cb_to);	1436	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1437	if (timeout >= 0.)
916	{	1438	{
917	evtimer_set (&once->to, timeout, 0.);	1439	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1440	ev_timer_start (EV_A_ &once->to);
919	}	1441	}
920	}	1442	}
921	}	1443	}
922		1444
923	/*****************************************************************************/
924
925	#if 0
926
927	struct ev_io wio;
928
929	static void
930	sin_cb (struct ev_io *w, int revents)
931	{
932	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933	}
934
935	static void
936	ocb (struct ev_timer *w, int revents)
937	{
938	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939	evtimer_stop (w);
940	evtimer_start (w);
941	}
942
943	static void
944	scb (struct ev_signal *w, int revents)
945	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);
948	evio_start (&wio);
949	}
950
951	static void
952	gcb (struct ev_signal *w, int revents)
953	{
954	fprintf (stderr, "generic %x\n", revents);
955
956	}
957
958	int main (void)
959	{
960	ev_init (0);
961
962	evio_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);
964
965	struct ev_timer t[10000];
966
967	#if 0
968	int i;
969	for (i = 0; i < 10000; ++i)
970	{
971	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);
975	if (drand48 () < 0.5)
976	evtimer_stop (w);
977	}
978	#endif
979
980	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);
983
984	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);
987
988	struct ev_check cw;
989	evcheck_init (&cw, gcb);
990	evcheck_start (&cw);
991
992	struct ev_idle iw;
993	evidle_init (&iw, gcb);
994	evidle_start (&iw);
995
996	ev_loop (0);
997
998	return 0;
999	}
1000
1001	#endif
1002
1003
1004
1005

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Comparing libev/ev.c (file contents): Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs. Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC