[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 1.56 by root, Sun Nov 4 15:58:49 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
36		41
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
41	#include <sys/time.h>	50	#include <sys/time.h>
42	#include <time.h>	51	#include <time.h>
43		52
		53	/**/
		54
44	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
45	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
46	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
47	# endif	84	#endif
48	#endif
49		85
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	86	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
60	#endif	89	#endif
		90
		91	/**/
61		92
62	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
63	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
64		97
65	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
66		113
67	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
70		117
71	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74
75	static int have_monotonic; /* runtime */
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		119
81	/*****************************************************************************/	120	/*****************************************************************************/
82		121
83	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
84	ev_time (void)	156	ev_time (void)
85	{	157	{
86	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
87	struct timespec ts;	159	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	162	#else
91	struct timeval tv;	163	struct timeval tv;
92	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	166	#endif
95	}	167	}
96		168
97	static ev_tstamp	169	inline ev_tstamp
98	get_clock (void)	170	get_clock (void)
99	{	171	{
100	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
101	if (have_monotonic)	173	if (expect_true (have_monotonic))
102	{	174	{
103	struct timespec ts;	175	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	178	}
107	#endif	179	#endif
108		180
109	return ev_time ();	181	return ev_time ();
110	}	182	}
111		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		191
112	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
114	{ \	194	{ \
115	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
		196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
116	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	204	cur = newcnt; \
119	}	205	}
120		206
121	/*****************************************************************************/	207	/*****************************************************************************/
122		208
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	209	static void
136	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
137	{	211	{
138	while (count--)	212	while (count--)
139	{	213	{
140	base->head = 0;	214	base->head = 0;
141	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
142	++base;	218	++base;
143	}	219	}
144	}	220	}
145		221
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	222	static void
156	event (W w, int events)	223	event (EV_P_ W w, int events)
157	{	224	{
158	if (w->active)	225	if (w->pending)
159	{	226	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
164	}	229	}
165	}
166		230
		231	w->pending = ++pendingcnt [ABSPRI (w)];
		232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		233	pendings [ABSPRI (w)][w->pending - 1].w = w;
		234	pendings [ABSPRI (w)][w->pending - 1].events = events;
		235	}
		236
167	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
168	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
169	{	248	{
170	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	250	struct ev_io *w;
172		251
173	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	253	{
175	int ev = w->events & events;	254	int ev = w->events & events;
176		255
177	if (ev)	256	if (ev)
178	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
179	}	258	}
180	}	259	}
181		260
		261	/*****************************************************************************/
		262
182	static void	263	static void
183	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
184	{	265	{
185	int i;	266	int i;
186		267
187	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		277	events \|= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify \|\| fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
189	}	314	}
190		315
191	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
192	static void	317	static void
193	fd_recheck ()	318	fd_ebadf (EV_P)
194	{	319	{
195	int fd;	320	int fd;
196		321
197	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	323	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
		340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
202	}	356	}
203		357
204	/*****************************************************************************/	358	/*****************************************************************************/
205		359
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	360	static void
213	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
214	{	362	{
215	WT w = timers [k];	363	WT w = heap [k];
216		364
217	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
218	{	366	{
219	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
221	k >>= 1;	369	k >>= 1;
222	}	370	}
223		371
224	timers [k] = w;	372	heap [k] = w;
225	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
226		374
227	}	375	}
228		376
229	static void	377	static void
230	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
231	{	379	{
232	WT w = timers [k];	380	WT w = heap [k];
233		381
234	while (k < (N >> 1))	382	while (k < (N >> 1))
235	{	383	{
236	int j = k << 1;	384	int j = k << 1;
237		385
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	387	++j;
240		388
241	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
242	break;	390	break;
243		391
244	timers [k] = timers [j];	392	heap [k] = heap [j];
245	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
246	k = j;	394	k = j;
247	}	395	}
248		396
249	timers [k] = w;	397	heap [k] = w;
250	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
251	}	399	}
252		400
253	/*****************************************************************************/	401	/*****************************************************************************/
254		402
255	typedef struct	403	typedef struct
256	{	404	{
257	struct ev_signal *head;	405	struct ev_watcher_list *head;
258	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
259	} ANSIG;	407	} ANSIG;
260		408
261	static ANSIG *signals;	409	static ANSIG *signals;
262	static int signalmax;	410	static int signalmax;
263		411
264	static int sigpipe [2];	412	static int sigpipe [2];
265	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;
267		414
268	static void	415	static void
269	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
270	{	417	{
271	while (count--)	418	while (count--)
272	{	419	{
273	base->head = 0;	420	base->head = 0;
274	base->gotsig = 0;	421	base->gotsig = 0;
		422
275	++base;	423	++base;
276	}	424	}
277	}	425	}
278		426
279	static void	427	static void
…		…
281	{	429	{
282	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
283		431
284	if (!gotsig)	432	if (!gotsig)
285	{	433	{
		434	int old_errno = errno;
286	gotsig = 1;	435	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
288	}	438	}
289	}	439	}
290		440
291	static void	441	static void
292	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	443	{
294	struct ev_signal *w;	444	struct ev_watcher_list *w;
295	int sig;	445	int signum;
296		446
		447	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	448	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		449
300	for (sig = signalmax; sig--; )	450	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	451	if (signals [signum].gotsig)
302	{	452	{
303	signals [sig].gotsig = 0;	453	signals [signum].gotsig = 0;
304		454
305	for (w = signals [sig].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
307	}	457	}
308	}	458	}
309		459
310	static void	460	static void
311	siginit (void)	461	siginit (EV_P)
312	{	462	{
		463	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		466
316	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
319		471
320	evio_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	475	}
323		476
324	/*****************************************************************************/	477	/*****************************************************************************/
325		478
326	static struct ev_idle **idles;	479	#ifndef WIN32
327	static int idlemax, idlecnt;
328		480
329	static struct ev_check **checks;	481	#ifndef WCONTINUED
330	static int checkmax, checkcnt;	482	# define WCONTINUED 0
		483	#endif
		484
		485	static void
		486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		487	{
		488	struct ev_child *w;
		489
		490	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		491	if (w->pid == pid \|\| !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it now */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
		503	int pid, status;
		504
		505	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		506	{
		507	/* make sure we are called again until all childs have been reaped */
		508	event (EV_A_ (W)sw, EV_SIGNAL);
		509
		510	child_reap (EV_A_ sw, pid, pid, status);
		511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
		513	}
		514
		515	#endif
331		516
332	/*****************************************************************************/	517	/*****************************************************************************/
333		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
334	#if HAVE_EPOLL	522	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	523	# include "ev_epoll.c"
336	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
337	#if HAVE_SELECT	528	#if EV_USE_SELECT
338	# include "ev_select.c"	529	# include "ev_select.c"
339	#endif	530	#endif
340		531
341	int ev_init (int flags)	532	int
		533	ev_version_major (void)
342	{	534	{
		535	return EV_VERSION_MAJOR;
		536	}
		537
		538	int
		539	ev_version_minor (void)
		540	{
		541	return EV_VERSION_MINOR;
		542	}
		543
		544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
		547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	\|\| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
		565	if (!method)
		566	{
343	#if HAVE_MONOTONIC	567	#if EV_USE_MONOTONIC
344	{	568	{
345	struct timespec ts;	569	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	571	have_monotonic = 1;
348	}	572	}
349	#endif	573	#endif
350		574
351	ev_now = ev_time ();	575	rt_now = ev_time ();
352	now = get_clock ();	576	mn_now = get_clock ();
353	diff = ev_now - now;	577	now_floor = mn_now;
		578	rtmn_diff = rt_now - mn_now;
354		579
		580	if (methods == EVMETHOD_AUTO)
		581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
		584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
		590	#if EV_USE_EPOLL
		591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		595	#endif
		596	#if EV_USE_SELECT
		597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		598	#endif
		599	}
		600	}
		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/TODO/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/TODO/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
355	if (pipe (sigpipe))	676	if (pipe (sigpipe))
356	return 0;	677	return 0;
357		678
358	ev_method = EVMETHOD_NONE;	679	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	{	680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
		689	if (ev_method (EV_A))
		690	{
368	evw_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
369	siginit ();	693	siginit (EV_A);
370	}
371		694
372	return ev_method;	695	#ifndef WIN32
373	}	696	ev_signal_init (&childev, childcb, SIGCHLD);
374		697	ev_set_priority (&childev, EV_MAXPRI);
375	/*****************************************************************************/	698	ev_signal_start (EV_A_ &childev);
376		699	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	700	#endif
		701	}
		702	else
		703	default_loop = 0;
		704	}
393		705
		706	return default_loop;
		707	}
		708
		709	void
		710	ev_default_destroy (void)
		711	{
		712	struct ev_loop *loop = default_loop;
		713
		714	ev_ref (EV_A); /* child watcher */
		715	ev_signal_stop (EV_A_ &childev);
		716
		717	ev_ref (EV_A); /* signal watcher */
394	evio_stop (&sigev);	718	ev_io_stop (EV_A_ &sigev);
		719
		720	close (sigpipe [0]); sigpipe [0] = 0;
		721	close (sigpipe [1]); sigpipe [1] = 0;
		722
		723	loop_destroy (EV_A);
		724	}
		725
		726	void
		727	ev_default_fork (EV_P)
		728	{
		729	loop_fork (EV_A);
		730
		731	ev_io_stop (EV_A_ &sigev);
395	close (sigpipe [0]);	732	close (sigpipe [0]);
396	close (sigpipe [1]);	733	close (sigpipe [1]);
397	pipe (sigpipe);	734	pipe (sigpipe);
		735
		736	ev_ref (EV_A); /* signal watcher */
398	siginit ();	737	siginit (EV_A);
399	}	738	}
400		739
401	/*****************************************************************************/	740	/*****************************************************************************/
402		741
403	static void	742	static void
404	fd_reify (void)	743	call_pending (EV_P)
405	{	744	{
406	int i;	745	int pri;
407		746
408	for (i = 0; i < fdchangecnt; ++i)	747	for (pri = NUMPRI; pri--; )
409	{	748	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	{	749	{
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;	750	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		751
436	if (p->w)	752	if (p->w)
437	{	753	{
438	p->w->pending = 0;	754	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	755	p->w->cb (EV_A_ p->w, p->events);
440	}	756	}
441	}	757	}
442	}	758	}
443		759
444	static void	760	static void
445	timers_reify ()	761	timers_reify (EV_P)
446	{	762	{
447	while (timercnt && timers [0]->at <= now)	763	while (timercnt && timers [0]->at <= mn_now)
448	{	764	{
449	struct ev_timer *w = timers [0];	765	struct ev_timer *w = timers [0];
450
451	event ((W)w, EV_TIMEOUT);
452		766
453	/* first reschedule or stop timer */	767	/* first reschedule or stop timer */
454	if (w->repeat)	768	if (w->repeat)
455	{	769	{
		770	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	771	w->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	772	downheap ((WT *)timers, timercnt, 0);
459	}	773	}
460	else	774	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	775	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		776
		777	event (EV_A_ (W)w, EV_TIMEOUT);
		778	}
		779	}
		780
465	static void	781	static void
466	periodics_reify ()	782	periodics_reify (EV_P)
467	{	783	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	784	while (periodiccnt && periodics [0]->at <= rt_now)
469	{	785	{
470	struct ev_periodic *w = periodics [0];	786	struct ev_periodic *w = periodics [0];
471		787
472	/* first reschedule or stop timer */	788	/* first reschedule or stop timer */
473	if (w->interval)	789	if (w->interval)
474	{	790	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	791	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
476	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	792	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	793	downheap ((WT *)periodics, periodiccnt, 0);
478	}	794	}
479	else	795	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	796	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		797
482	event ((W)w, EV_TIMEOUT);	798	event (EV_A_ (W)w, EV_PERIODIC);
483	}	799	}
484	}	800	}
485		801
486	static void	802	static void
487	periodics_reschedule (ev_tstamp diff)	803	periodics_reschedule (EV_P)
488	{	804	{
489	int i;	805	int i;
490		806
491	/* adjust periodics after time jump */	807	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	808	for (i = 0; i < periodiccnt; ++i)
493	{	809	{
494	struct ev_periodic *w = periodics [i];	810	struct ev_periodic *w = periodics [i];
495		811
496	if (w->interval)	812	if (w->interval)
497	{	813	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	814	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
499		815
500	if (fabs (diff) >= 1e-4)	816	if (fabs (diff) >= 1e-4)
501	{	817	{
502	evperiodic_stop (w);	818	ev_periodic_stop (EV_A_ w);
503	evperiodic_start (w);	819	ev_periodic_start (EV_A_ w);
504		820
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	821	i = 0; /* restart loop, inefficient, but time jumps should be rare */
506	}	822	}
507	}	823	}
508	}	824	}
509	}	825	}
510		826
		827	inline int
		828	time_update_monotonic (EV_P)
		829	{
		830	mn_now = get_clock ();
		831
		832	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		833	{
		834	rt_now = rtmn_diff + mn_now;
		835	return 0;
		836	}
		837	else
		838	{
		839	now_floor = mn_now;
		840	rt_now = ev_time ();
		841	return 1;
		842	}
		843	}
		844
511	static void	845	static void
512	time_update ()	846	time_update (EV_P)
513	{	847	{
514	int i;	848	int i;
515		849
516	ev_now = ev_time ();	850	#if EV_USE_MONOTONIC
517
518	if (have_monotonic)	851	if (expect_true (have_monotonic))
519	{	852	{
520	ev_tstamp odiff = diff;	853	if (time_update_monotonic (EV_A))
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	854	{
524	now = get_clock ();	855	ev_tstamp odiff = rtmn_diff;
		856
		857	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		858	{
525	diff = ev_now - now;	859	rtmn_diff = rt_now - mn_now;
526		860
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)	861	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
528	return; /* all is well */	862	return; /* all is well */
529		863
530	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = get_clock ();
		866	now_floor = mn_now;
		867	}
		868
		869	periodics_reschedule (EV_A);
		870	/* no timer adjustment, as the monotonic clock doesn't jump */
		871	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
531	}	872	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}	873	}
536	else	874	else
		875	#endif
537	{	876	{
538	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	877	rt_now = ev_time ();
		878
		879	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
539	{	880	{
540	periodics_reschedule (ev_now - now);	881	periodics_reschedule (EV_A);
541		882
542	/* adjust timers. this is easy, as the offset is the same for all */	883	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	884	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	885	timers [i]->at += rt_now - mn_now;
545	}	886	}
546		887
547	now = ev_now;	888	mn_now = rt_now;
548	}	889	}
549	}	890	}
550		891
551	int ev_loop_done;	892	void
		893	ev_ref (EV_P)
		894	{
		895	++activecnt;
		896	}
552		897
		898	void
		899	ev_unref (EV_P)
		900	{
		901	--activecnt;
		902	}
		903
		904	static int loop_done;
		905
		906	void
553	void ev_loop (int flags)	907	ev_loop (EV_P_ int flags)
554	{	908	{
555	double block;	909	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	910	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		911
564	do	912	do
565	{	913	{
		914	/* queue check watchers (and execute them) */
		915	if (expect_false (preparecnt))
		916	{
		917	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		918	call_pending (EV_A);
		919	}
		920
566	/* update fd-related kernel structures */	921	/* update fd-related kernel structures */
567	fd_reify ();	922	fd_reify (EV_A);
568		923
569	/* calculate blocking time */	924	/* calculate blocking time */
570		925
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	926	/* we only need this for !monotonic clockor timers, but as we basically
		927	always have timers, we just calculate it always */
		928	#if EV_USE_MONOTONIC
		929	if (expect_true (have_monotonic))
		930	time_update_monotonic (EV_A);
		931	else
		932	#endif
		933	{
572	ev_now = ev_time ();	934	rt_now = ev_time ();
		935	mn_now = rt_now;
		936	}
573		937
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	938	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	939	block = 0.;
576	else	940	else
577	{	941	{
578	block = MAX_BLOCKTIME;	942	block = MAX_BLOCKTIME;
579		943
580	if (timercnt)	944	if (timercnt)
581	{	945	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	946	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
583	if (block > to) block = to;	947	if (block > to) block = to;
584	}	948	}
585		949
586	if (periodiccnt)	950	if (periodiccnt)
587	{	951	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	952	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
589	if (block > to) block = to;	953	if (block > to) block = to;
590	}	954	}
591		955
592	if (block < 0.) block = 0.;	956	if (block < 0.) block = 0.;
593	}	957	}
594		958
595	method_poll (block);	959	method_poll (EV_A_ block);
596		960
597	/* update ev_now, do magic */	961	/* update rt_now, do magic */
598	time_update ();	962	time_update (EV_A);
599		963
600	/* queue pending timers and reschedule them */	964	/* queue pending timers and reschedule them */
		965	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	966	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		967
604	/* queue idle watchers unless io or timers are pending */	968	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	969	if (!pendingcnt)
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	970	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		971
608	/* queue check and possibly idle watchers */	972	/* queue check watchers, to be executed first */
		973	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	974	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		975
611	call_pending ();	976	call_pending (EV_A);
612	}	977	}
613	while (!ev_loop_done);	978	while (activecnt && !loop_done);
614		979
615	if (ev_loop_done != 2)	980	if (loop_done != 2)
616	ev_loop_done = 0;	981	loop_done = 0;
		982	}
		983
		984	void
		985	ev_unloop (EV_P_ int how)
		986	{
		987	loop_done = how;
617	}	988	}
618		989
619	/*****************************************************************************/	990	/*****************************************************************************/
620		991
621	static void	992	inline void
622	wlist_add (WL *head, WL elem)	993	wlist_add (WL *head, WL elem)
623	{	994	{
624	elem->next = *head;	995	elem->next = *head;
625	*head = elem;	996	*head = elem;
626	}	997	}
627		998
628	static void	999	inline void
629	wlist_del (WL *head, WL elem)	1000	wlist_del (WL *head, WL elem)
630	{	1001	{
631	while (*head)	1002	while (*head)
632	{	1003	{
633	if (*head == elem)	1004	if (*head == elem)
…		…
638		1009
639	head = &(*head)->next;	1010	head = &(*head)->next;
640	}	1011	}
641	}	1012	}
642		1013
643	static void	1014	inline void
644	ev_clear (W w)	1015	ev_clear_pending (EV_P_ W w)
645	{	1016	{
646	if (w->pending)	1017	if (w->pending)
647	{	1018	{
648	pendings [w->pending - 1].w = 0;	1019	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1020	w->pending = 0;
650	}	1021	}
651	}	1022	}
652		1023
653	static void	1024	inline void
654	ev_start (W w, int active)	1025	ev_start (EV_P_ W w, int active)
655	{	1026	{
		1027	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1028	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1029
656	w->active = active;	1030	w->active = active;
		1031	ev_ref (EV_A);
657	}	1032	}
658		1033
659	static void	1034	inline void
660	ev_stop (W w)	1035	ev_stop (EV_P_ W w)
661	{	1036	{
		1037	ev_unref (EV_A);
662	w->active = 0;	1038	w->active = 0;
663	}	1039	}
664		1040
665	/*****************************************************************************/	1041	/*****************************************************************************/
666		1042
667	void	1043	void
668	evio_start (struct ev_io *w)	1044	ev_io_start (EV_P_ struct ev_io *w)
669	{	1045	{
		1046	int fd = w->fd;
		1047
670	if (ev_is_active (w))	1048	if (ev_is_active (w))
671	return;	1049	return;
672		1050
673	int fd = w->fd;	1051	assert (("ev_io_start called with negative fd", fd >= 0));
674		1052
675	ev_start ((W)w, 1);	1053	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1054	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1055	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1056
679	++fdchangecnt;	1057	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1058	}
683		1059
684	void	1060	void
685	evio_stop (struct ev_io *w)	1061	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1062	{
687	ev_clear ((W)w);	1063	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
689	return;	1065	return;
690		1066
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1067	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1068	ev_stop (EV_A_ (W)w);
693		1069
694	++fdchangecnt;	1070	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1071	}
698		1072
699	void	1073	void
700	evtimer_start (struct ev_timer *w)	1074	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1075	{
702	if (ev_is_active (w))	1076	if (ev_is_active (w))
703	return;	1077	return;
704		1078
705	w->at += now;	1079	w->at += mn_now;
706		1080
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1081	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1082
709	ev_start ((W)w, ++timercnt);	1083	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1084	array_needsize (timers, timermax, timercnt, );
711	timers [timercnt - 1] = w;	1085	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1086	upheap ((WT *)timers, timercnt - 1);
713	}	1087	}
714		1088
715	void	1089	void
716	evtimer_stop (struct ev_timer *w)	1090	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1091	{
718	ev_clear ((W)w);	1092	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1093	if (!ev_is_active (w))
720	return;	1094	return;
721		1095
722	if (w->active < timercnt--)	1096	if (w->active < timercnt--)
723	{	1097	{
…		…
725	downheap ((WT *)timers, timercnt, w->active - 1);	1099	downheap ((WT *)timers, timercnt, w->active - 1);
726	}	1100	}
727		1101
728	w->at = w->repeat;	1102	w->at = w->repeat;
729		1103
730	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
731	}	1105	}
732		1106
733	void	1107	void
734	evtimer_again (struct ev_timer *w)	1108	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1109	{
736	if (ev_is_active (w))	1110	if (ev_is_active (w))
737	{	1111	{
738	if (w->repeat)	1112	if (w->repeat)
739	{	1113	{
740	w->at = now + w->repeat;	1114	w->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1115	downheap ((WT *)timers, timercnt, w->active - 1);
742	}	1116	}
743	else	1117	else
744	evtimer_stop (w);	1118	ev_timer_stop (EV_A_ w);
745	}	1119	}
746	else if (w->repeat)	1120	else if (w->repeat)
747	evtimer_start (w);	1121	ev_timer_start (EV_A_ w);
748	}	1122	}
749		1123
750	void	1124	void
751	evperiodic_start (struct ev_periodic *w)	1125	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1126	{
753	if (ev_is_active (w))	1127	if (ev_is_active (w))
754	return;	1128	return;
755		1129
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1130	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
757		1131
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1132	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)	1133	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1134	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
761		1135
762	ev_start ((W)w, ++periodiccnt);	1136	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1137	array_needsize (periodics, periodicmax, periodiccnt, );
764	periodics [periodiccnt - 1] = w;	1138	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1139	upheap ((WT *)periodics, periodiccnt - 1);
766	}	1140	}
767		1141
768	void	1142	void
769	evperiodic_stop (struct ev_periodic *w)	1143	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1144	{
771	ev_clear ((W)w);	1145	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1146	if (!ev_is_active (w))
773	return;	1147	return;
774		1148
775	if (w->active < periodiccnt--)	1149	if (w->active < periodiccnt--)
776	{	1150	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1151	periodics [w->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1152	downheap ((WT *)periodics, periodiccnt, w->active - 1);
779	}	1153	}
780		1154
781	ev_stop ((W)w);	1155	ev_stop (EV_A_ (W)w);
782	}	1156	}
783		1157
784	void	1158	void
785	evsignal_start (struct ev_signal *w)	1159	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1160	{
787	if (ev_is_active (w))	1161	if (ev_is_active (w))
788	return;	1162	return;
789		1163
		1164	ev_start (EV_A_ (W)w, ++idlecnt);
		1165	array_needsize (idles, idlemax, idlecnt, );
		1166	idles [idlecnt - 1] = w;
		1167	}
		1168
		1169	void
		1170	ev_idle_stop (EV_P_ struct ev_idle *w)
		1171	{
		1172	ev_clear_pending (EV_A_ (W)w);
		1173	if (ev_is_active (w))
		1174	return;
		1175
		1176	idles [w->active - 1] = idles [--idlecnt];
		1177	ev_stop (EV_A_ (W)w);
		1178	}
		1179
		1180	void
		1181	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1182	{
		1183	if (ev_is_active (w))
		1184	return;
		1185
		1186	ev_start (EV_A_ (W)w, ++preparecnt);
		1187	array_needsize (prepares, preparemax, preparecnt, );
		1188	prepares [preparecnt - 1] = w;
		1189	}
		1190
		1191	void
		1192	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1193	{
		1194	ev_clear_pending (EV_A_ (W)w);
		1195	if (ev_is_active (w))
		1196	return;
		1197
		1198	prepares [w->active - 1] = prepares [--preparecnt];
		1199	ev_stop (EV_A_ (W)w);
		1200	}
		1201
		1202	void
		1203	ev_check_start (EV_P_ struct ev_check *w)
		1204	{
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	ev_start (EV_A_ (W)w, ++checkcnt);
		1209	array_needsize (checks, checkmax, checkcnt, );
		1210	checks [checkcnt - 1] = w;
		1211	}
		1212
		1213	void
		1214	ev_check_stop (EV_P_ struct ev_check *w)
		1215	{
		1216	ev_clear_pending (EV_A_ (W)w);
		1217	if (ev_is_active (w))
		1218	return;
		1219
		1220	checks [w->active - 1] = checks [--checkcnt];
		1221	ev_stop (EV_A_ (W)w);
		1222	}
		1223
		1224	#ifndef SA_RESTART
		1225	# define SA_RESTART 0
		1226	#endif
		1227
		1228	void
		1229	ev_signal_start (EV_P_ struct ev_signal *w)
		1230	{
		1231	#if EV_MULTIPLICITY
		1232	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1233	#endif
		1234	if (ev_is_active (w))
		1235	return;
		1236
		1237	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1238
790	ev_start ((W)w, 1);	1239	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1240	array_needsize (signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1241	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1242
794	if (!w->next)	1243	if (!w->next)
795	{	1244	{
796	struct sigaction sa;	1245	struct sigaction sa;
797	sa.sa_handler = sighandler;	1246	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1247	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1248	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1249	sigaction (w->signum, &sa, 0);
801	}	1250	}
802	}	1251	}
803		1252
804	void	1253	void
805	evsignal_stop (struct ev_signal *w)	1254	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1255	{
807	ev_clear ((W)w);	1256	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1257	if (!ev_is_active (w))
809	return;	1258	return;
810		1259
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1260	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1261	ev_stop (EV_A_ (W)w);
813		1262
814	if (!signals [w->signum - 1].head)	1263	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1264	signal (w->signum, SIG_DFL);
816	}	1265	}
817		1266
818	void evidle_start (struct ev_idle *w)	1267	void
		1268	ev_child_start (EV_P_ struct ev_child *w)
819	{	1269	{
		1270	#if EV_MULTIPLICITY
		1271	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1272	#endif
820	if (ev_is_active (w))	1273	if (ev_is_active (w))
821	return;	1274	return;
822		1275
823	ev_start ((W)w, ++idlecnt);	1276	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1277	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1278	}
827		1279
828	void evidle_stop (struct ev_idle *w)	1280	void
		1281	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1282	{
830	ev_clear ((W)w);	1283	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1284	if (ev_is_active (w))
832	return;	1285	return;
833		1286
834	idles [w->active - 1] = idles [--idlecnt];	1287	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1288	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	}	1289	}
857		1290
858	/*****************************************************************************/	1291	/*****************************************************************************/
859		1292
860	struct ev_once	1293	struct ev_once
…		…
864	void (cb)(int revents, void arg);	1297	void (cb)(int revents, void arg);
865	void *arg;	1298	void *arg;
866	};	1299	};
867		1300
868	static void	1301	static void
869	once_cb (struct ev_once *once, int revents)	1302	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1303	{
871	void (cb)(int revents, void arg) = once->cb;	1304	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	1305	void *arg = once->arg;
873		1306
874	evio_stop (&once->io);	1307	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1308	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1309	free (once);
877		1310
878	cb (revents, arg);	1311	cb (revents, arg);
879	}	1312	}
880		1313
881	static void	1314	static void
882	once_cb_io (struct ev_io *w, int revents)	1315	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1316	{
884	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1317	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
885	}	1318	}
886		1319
887	static void	1320	static void
888	once_cb_to (struct ev_timer *w, int revents)	1321	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1322	{
890	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1323	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
891	}	1324	}
892		1325
893	void	1326	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1327	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
895	{	1328	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1329	struct ev_once *once = malloc (sizeof (struct ev_once));
897		1330
898	if (!once)	1331	if (!once)
899	cb (EV_ERROR, arg);	1332	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
900	else	1333	else
901	{	1334	{
902	once->cb = cb;	1335	once->cb = cb;
903	once->arg = arg;	1336	once->arg = arg;
904		1337
905	evw_init (&once->io, once_cb_io);	1338	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1339	if (fd >= 0)
908	{	1340	{
909	evio_set (&once->io, fd, events);	1341	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1342	ev_io_start (EV_A_ &once->io);
911	}	1343	}
912		1344
913	evw_init (&once->to, once_cb_to);	1345	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1346	if (timeout >= 0.)
916	{	1347	{
917	evtimer_set (&once->to, timeout, 0.);	1348	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1349	ev_timer_start (EV_A_ &once->to);
919	}	1350	}
920	}	1351	}
921	}	1352	}
922		1353
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

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs. Revision 1.56 by root, Sun Nov 4 15:58:49 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.56 by root, Sun Nov 4 15:58:49 2007 UTC