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

Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.62 by root, Sun Nov 4 20:38:07 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
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		149
81	/*****************************************************************************/	150	/*****************************************************************************/
82		151
83	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
84	ev_time (void)	186	ev_time (void)
85	{	187	{
86	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
87	struct timespec ts;	189	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	192	#else
91	struct timeval tv;	193	struct timeval tv;
92	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	196	#endif
95	}	197	}
96		198
97	static ev_tstamp	199	inline ev_tstamp
98	get_clock (void)	200	get_clock (void)
99	{	201	{
100	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
101	if (have_monotonic)	203	if (expect_true (have_monotonic))
102	{	204	{
103	struct timespec ts;	205	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	208	}
107	#endif	209	#endif
108		210
109	return ev_time ();	211	return ev_time ();
110	}	212	}
111		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		221
112	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
114	{ \	224	{ \
115	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
		226	do \
		227	{ \
		228	newcnt = array_roundsize (base, newcnt << 1); \
		229	} \
		230	while ((cnt) > newcnt); \
		231	\
116	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	234	cur = newcnt; \
119	}	235	}
120		236
121	/*****************************************************************************/	237	/*****************************************************************************/
122		238
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	239	static void
136	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
137	{	241	{
138	while (count--)	242	while (count--)
139	{	243	{
140	base->head = 0;	244	base->head = 0;
141	base->wev = base->rev = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
142	++base;	248	++base;
143	}	249	}
144	}	250	}
145		251
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	252	static void
156	event (W w, int events)	253	event (EV_P_ W w, int events)
157	{	254	{
158	if (w->active)	255	if (w->pending)
159	{	256	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		258	return;
164	}	259	}
165	}
166		260
		261	w->pending = ++pendingcnt [ABSPRI (w)];
		262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		263	pendings [ABSPRI (w)][w->pending - 1].w = w;
		264	pendings [ABSPRI (w)][w->pending - 1].events = events;
		265	}
		266
167	static void	267	static void
		268	queue_events (EV_P_ W *events, int eventcnt, int type)
		269	{
		270	int i;
		271
		272	for (i = 0; i < eventcnt; ++i)
		273	event (EV_A_ events [i], type);
		274	}
		275
		276	static void
168	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
169	{	278	{
170	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	280	struct ev_io *w;
172		281
173	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	283	{
175	int ev = w->events & events;	284	int ev = w->events & events;
176		285
177	if (ev)	286	if (ev)
178	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
179	}	288	}
180	}	289	}
181		290
		291	/*****************************************************************************/
		292
182	static void	293	static void
183	queue_events (W *events, int eventcnt, int type)	294	fd_reify (EV_P)
184	{	295	{
185	int i;	296	int i;
186		297
187	for (i = 0; i < eventcnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	299	{
		300	int fd = fdchanges [i];
		301	ANFD *anfd = anfds + fd;
		302	struct ev_io *w;
		303
		304	int events = 0;
		305
		306	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		307	events \|= w->events;
		308
		309	anfd->reify = 0;
		310
		311	if (anfd->events != events)
		312	{
		313	method_modify (EV_A_ fd, anfd->events, events);
		314	anfd->events = events;
		315	}
		316	}
		317
		318	fdchangecnt = 0;
		319	}
		320
		321	static void
		322	fd_change (EV_P_ int fd)
		323	{
		324	if (anfds [fd].reify \|\| fdchangecnt < 0)
		325	return;
		326
		327	anfds [fd].reify = 1;
		328
		329	++fdchangecnt;
		330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		331	fdchanges [fdchangecnt - 1] = fd;
		332	}
		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		343	}
189	}	344	}
190		345
191	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
192	static void	347	static void
193	fd_recheck ()	348	fd_ebadf (EV_P)
194	{	349	{
195	int fd;	350	int fd;
196		351
197	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	353	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	355	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
		366	{
		367	close (fd);
		368	fd_kill (EV_A_ fd);
		369	return;
		370	}
		371	}
		372
		373	/* susually called after fork if method needs to re-arm all fds from scratch */
		374	static void
		375	fd_rearm_all (EV_P)
		376	{
		377	int fd;
		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
202	}	386	}
203		387
204	/*****************************************************************************/	388	/*****************************************************************************/
205		389
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	390	static void
213	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
214	{	392	{
215	WT w = timers [k];	393	WT w = heap [k];
216		394
217	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
218	{	396	{
219	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
221	k >>= 1;	399	k >>= 1;
222	}	400	}
223		401
224	timers [k] = w;	402	heap [k] = w;
225	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
226		404
227	}	405	}
228		406
229	static void	407	static void
230	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
231	{	409	{
232	WT w = timers [k];	410	WT w = heap [k];
233		411
234	while (k < (N >> 1))	412	while (k < (N >> 1))
235	{	413	{
236	int j = k << 1;	414	int j = k << 1;
237		415
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	417	++j;
240		418
241	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
242	break;	420	break;
243		421
244	timers [k] = timers [j];	422	heap [k] = heap [j];
245	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
246	k = j;	424	k = j;
247	}	425	}
248		426
249	timers [k] = w;	427	heap [k] = w;
250	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
251	}	429	}
252		430
253	/*****************************************************************************/	431	/*****************************************************************************/
254		432
255	typedef struct	433	typedef struct
256	{	434	{
257	struct ev_signal *head;	435	struct ev_watcher_list *head;
258	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
259	} ANSIG;	437	} ANSIG;
260		438
261	static ANSIG *signals;	439	static ANSIG *signals;
262	static int signalmax;	440	static int signalmax;
263		441
264	static int sigpipe [2];	442	static int sigpipe [2];
265	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	444	static struct ev_io sigev;
267		445
268	static void	446	static void
269	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
270	{	448	{
271	while (count--)	449	while (count--)
272	{	450	{
273	base->head = 0;	451	base->head = 0;
274	base->gotsig = 0;	452	base->gotsig = 0;
		453
275	++base;	454	++base;
276	}	455	}
277	}	456	}
278		457
279	static void	458	static void
…		…
281	{	460	{
282	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
283		462
284	if (!gotsig)	463	if (!gotsig)
285	{	464	{
		465	int old_errno = errno;
286	gotsig = 1;	466	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
288	}	469	}
289	}	470	}
290		471
291	static void	472	static void
292	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	474	{
294	struct ev_signal *w;	475	struct ev_watcher_list *w;
295	int sig;	476	int signum;
296		477
		478	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	479	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		480
300	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
302	{	483	{
303	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
304		485
305	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
307	}	488	}
308	}	489	}
309		490
310	static void	491	static void
311	siginit (void)	492	siginit (EV_P)
312	{	493	{
		494	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		497
316	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
319		502
320	evio_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	506	}
323		507
324	/*****************************************************************************/	508	/*****************************************************************************/
325		509
326	static struct ev_idle **idles;	510	#ifndef WIN32
327	static int idlemax, idlecnt;
328		511
329	static struct ev_prepare **prepares;	512	static struct ev_child *childs [PID_HASHSIZE];
330	static int preparemax, preparecnt;	513	static struct ev_signal childev;
331		514
332	static struct ev_check **checks;	515	#ifndef WCONTINUED
333	static int checkmax, checkcnt;	516	# define WCONTINUED 0
		517	#endif
		518
		519	static void
		520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		521	{
		522	struct ev_child *w;
		523
		524	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		525	if (w->pid == pid \|\| !w->pid)
		526	{
		527	w->priority = sw->priority; /* need to do it now */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
		537	int pid, status;
		538
		539	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		540	{
		541	/* make sure we are called again until all childs have been reaped */
		542	event (EV_A_ (W)sw, EV_SIGNAL);
		543
		544	child_reap (EV_A_ sw, pid, pid, status);
		545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
		547	}
		548
		549	#endif
334		550
335	/*****************************************************************************/	551	/*****************************************************************************/
336		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
337	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
338	# include "ev_epoll.c"	557	# include "ev_epoll.c"
339	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
340	#if HAVE_SELECT	562	#if EV_USE_SELECT
341	# include "ev_select.c"	563	# include "ev_select.c"
342	#endif	564	#endif
343		565
344	int ev_init (int flags)	566	int
		567	ev_version_major (void)
345	{	568	{
		569	return EV_VERSION_MAJOR;
		570	}
		571
		572	int
		573	ev_version_minor (void)
		574	{
		575	return EV_VERSION_MINOR;
		576	}
		577
		578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
		581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	\|\| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
		599	if (!method)
		600	{
346	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
347	{	602	{
348	struct timespec ts;	603	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;	605	have_monotonic = 1;
351	}	606	}
352	#endif	607	#endif
353		608
354	ev_now = ev_time ();	609	rt_now = ev_time ();
355	now = get_clock ();	610	mn_now = get_clock ();
356	diff = ev_now - now;	611	now_floor = mn_now;
		612	rtmn_diff = rt_now - mn_now;
357		613
		614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
		618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_EPOLL
		628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		632	#endif
		633	#if EV_USE_SELECT
		634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		635	#endif
		636	}
		637	}
		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	#if EV_USE_WIN32
		643	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		644	#endif
		645	#if EV_USE_KQUEUE
		646	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		647	#endif
		648	#if EV_USE_EPOLL
		649	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_POLL
		652	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		653	#endif
		654	#if EV_USE_SELECT
		655	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		656	#endif
		657
		658	method = 0;
		659	/TODO/
		660	}
		661
		662	void
		663	loop_fork (EV_P)
		664	{
		665	/TODO/
		666	#if EV_USE_EPOLL
		667	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		668	#endif
		669	#if EV_USE_KQUEUE
		670	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		671	#endif
		672	}
		673
		674	#if EV_MULTIPLICITY
		675	struct ev_loop *
		676	ev_loop_new (int methods)
		677	{
		678	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		679
		680	loop_init (EV_A_ methods);
		681
		682	if (ev_method (EV_A))
		683	return loop;
		684
		685	return 0;
		686	}
		687
		688	void
		689	ev_loop_destroy (EV_P)
		690	{
		691	loop_destroy (EV_A);
		692	free (loop);
		693	}
		694
		695	void
		696	ev_loop_fork (EV_P)
		697	{
		698	loop_fork (EV_A);
		699	}
		700
		701	#endif
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop default_loop_struct;
		705	static struct ev_loop *default_loop;
		706
		707	struct ev_loop *
		708	#else
		709	static int default_loop;
		710
		711	int
		712	#endif
		713	ev_default_loop (int methods)
		714	{
		715	if (sigpipe [0] == sigpipe [1])
358	if (pipe (sigpipe))	716	if (pipe (sigpipe))
359	return 0;	717	return 0;
360		718
361	ev_method = EVMETHOD_NONE;	719	if (!default_loop)
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{	720	{
		721	#if EV_MULTIPLICITY
		722	struct ev_loop *loop = default_loop = &default_loop_struct;
		723	#else
		724	default_loop = 1;
		725	#endif
		726
		727	loop_init (EV_A_ methods);
		728
		729	if (ev_method (EV_A))
		730	{
371	evw_init (&sigev, sigcb);	731	ev_watcher_init (&sigev, sigcb);
		732	ev_set_priority (&sigev, EV_MAXPRI);
372	siginit ();	733	siginit (EV_A);
373	}
374		734
375	return ev_method;	735	#ifndef WIN32
376	}	736	ev_signal_init (&childev, childcb, SIGCHLD);
377		737	ev_set_priority (&childev, EV_MAXPRI);
378	/*****************************************************************************/	738	ev_signal_start (EV_A_ &childev);
379		739	ev_unref (EV_A); /* child watcher should not keep loop alive */
380	void ev_prefork (void)
381	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif	740	#endif
		741	}
		742	else
		743	default_loop = 0;
		744	}
396		745
		746	return default_loop;
		747	}
		748
		749	void
		750	ev_default_destroy (void)
		751	{
		752	#if EV_MULTIPLICITY
		753	struct ev_loop *loop = default_loop;
		754	#endif
		755
		756	ev_ref (EV_A); /* child watcher */
		757	ev_signal_stop (EV_A_ &childev);
		758
		759	ev_ref (EV_A); /* signal watcher */
397	evio_stop (&sigev);	760	ev_io_stop (EV_A_ &sigev);
		761
		762	close (sigpipe [0]); sigpipe [0] = 0;
		763	close (sigpipe [1]); sigpipe [1] = 0;
		764
		765	loop_destroy (EV_A);
		766	}
		767
		768	void
		769	ev_default_fork (void)
		770	{
		771	#if EV_MULTIPLICITY
		772	struct ev_loop *loop = default_loop;
		773	#endif
		774
		775	loop_fork (EV_A);
		776
		777	ev_io_stop (EV_A_ &sigev);
398	close (sigpipe [0]);	778	close (sigpipe [0]);
399	close (sigpipe [1]);	779	close (sigpipe [1]);
400	pipe (sigpipe);	780	pipe (sigpipe);
		781
		782	ev_ref (EV_A); /* signal watcher */
401	siginit ();	783	siginit (EV_A);
402	}	784	}
403		785
404	/*****************************************************************************/	786	/*****************************************************************************/
405		787
406	static void	788	static void
407	fd_reify (void)	789	call_pending (EV_P)
408	{	790	{
409	int i;	791	int pri;
410		792
411	for (i = 0; i < fdchangecnt; ++i)	793	for (pri = NUMPRI; pri--; )
412	{	794	while (pendingcnt [pri])
413	int fd = fdchanges [i];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416
417	int wev = 0;
418
419	for (w = anfd->head; w; w = w->next)
420	wev \|= w->events;
421
422	if (anfd->wev != wev)
423	{	795	{
424	method_modify (fd, anfd->wev, wev);
425	anfd->wev = wev;
426	}
427	}
428
429	fdchangecnt = 0;
430	}
431
432	static void
433	call_pending ()
434	{
435	while (pendingcnt)
436	{
437	ANPENDING *p = pendings + --pendingcnt;	796	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
438		797
439	if (p->w)	798	if (p->w)
440	{	799	{
441	p->w->pending = 0;	800	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	801	p->w->cb (EV_A_ p->w, p->events);
443	}	802	}
444	}	803	}
445	}	804	}
446		805
447	static void	806	static void
448	timers_reify ()	807	timers_reify (EV_P)
449	{	808	{
450	while (timercnt && timers [0]->at <= now)	809	while (timercnt && timers [0]->at <= mn_now)
451	{	810	{
452	struct ev_timer *w = timers [0];	811	struct ev_timer *w = timers [0];
453		812
454	event ((W)w, EV_TIMEOUT);	813	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		814
456	/* first reschedule or stop timer */	815	/* first reschedule or stop timer */
457	if (w->repeat)	816	if (w->repeat)
458	{	817	{
		818	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
459	w->at = now + w->repeat;	819	w->at = mn_now + w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));
461	downheap ((WT *)timers, timercnt, 0);	820	downheap ((WT *)timers, timercnt, 0);
462	}	821	}
463	else	822	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	823	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		824
		825	event (EV_A_ (W)w, EV_TIMEOUT);
		826	}
		827	}
		828
468	static void	829	static void
469	periodics_reify ()	830	periodics_reify (EV_P)
470	{	831	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	832	while (periodiccnt && periodics [0]->at <= rt_now)
472	{	833	{
473	struct ev_periodic *w = periodics [0];	834	struct ev_periodic *w = periodics [0];
		835
		836	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
474		837
475	/* first reschedule or stop timer */	838	/* first reschedule or stop timer */
476	if (w->interval)	839	if (w->interval)
477	{	840	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	841	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	842	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	843	downheap ((WT *)periodics, periodiccnt, 0);
481	}	844	}
482	else	845	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	846	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		847
485	event ((W)w, EV_TIMEOUT);	848	event (EV_A_ (W)w, EV_PERIODIC);
486	}	849	}
487	}	850	}
488		851
489	static void	852	static void
490	periodics_reschedule (ev_tstamp diff)	853	periodics_reschedule (EV_P)
491	{	854	{
492	int i;	855	int i;
493		856
494	/* adjust periodics after time jump */	857	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	858	for (i = 0; i < periodiccnt; ++i)
496	{	859	{
497	struct ev_periodic *w = periodics [i];	860	struct ev_periodic *w = periodics [i];
498		861
499	if (w->interval)	862	if (w->interval)
500	{	863	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	864	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
502		865
503	if (fabs (diff) >= 1e-4)	866	if (fabs (diff) >= 1e-4)
504	{	867	{
505	evperiodic_stop (w);	868	ev_periodic_stop (EV_A_ w);
506	evperiodic_start (w);	869	ev_periodic_start (EV_A_ w);
507		870
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	871	i = 0; /* restart loop, inefficient, but time jumps should be rare */
509	}	872	}
510	}	873	}
511	}	874	}
512	}	875	}
513		876
		877	inline int
		878	time_update_monotonic (EV_P)
		879	{
		880	mn_now = get_clock ();
		881
		882	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		883	{
		884	rt_now = rtmn_diff + mn_now;
		885	return 0;
		886	}
		887	else
		888	{
		889	now_floor = mn_now;
		890	rt_now = ev_time ();
		891	return 1;
		892	}
		893	}
		894
514	static void	895	static void
515	time_update ()	896	time_update (EV_P)
516	{	897	{
517	int i;	898	int i;
518		899
519	ev_now = ev_time ();	900	#if EV_USE_MONOTONIC
520
521	if (have_monotonic)	901	if (expect_true (have_monotonic))
522	{	902	{
523	ev_tstamp odiff = diff;	903	if (time_update_monotonic (EV_A))
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	904	{
527	now = get_clock ();	905	ev_tstamp odiff = rtmn_diff;
		906
		907	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		908	{
528	diff = ev_now - now;	909	rtmn_diff = rt_now - mn_now;
529		910
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)	911	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531	return; /* all is well */	912	return; /* all is well */
532		913
533	ev_now = ev_time ();	914	rt_now = ev_time ();
		915	mn_now = get_clock ();
		916	now_floor = mn_now;
		917	}
		918
		919	periodics_reschedule (EV_A);
		920	/* no timer adjustment, as the monotonic clock doesn't jump */
		921	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
534	}	922	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}	923	}
539	else	924	else
		925	#endif
540	{	926	{
541	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	927	rt_now = ev_time ();
		928
		929	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
542	{	930	{
543	periodics_reschedule (ev_now - now);	931	periodics_reschedule (EV_A);
544		932
545	/* adjust timers. this is easy, as the offset is the same for all */	933	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	934	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	935	timers [i]->at += rt_now - mn_now;
548	}	936	}
549		937
550	now = ev_now;	938	mn_now = rt_now;
551	}	939	}
552	}	940	}
553		941
554	int ev_loop_done;	942	void
		943	ev_ref (EV_P)
		944	{
		945	++activecnt;
		946	}
555		947
		948	void
		949	ev_unref (EV_P)
		950	{
		951	--activecnt;
		952	}
		953
		954	static int loop_done;
		955
		956	void
556	void ev_loop (int flags)	957	ev_loop (EV_P_ int flags)
557	{	958	{
558	double block;	959	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	960	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
560		961
561	do	962	do
562	{	963	{
563	/* queue check watchers (and execute them) */	964	/* queue check watchers (and execute them) */
564	if (checkcnt)	965	if (expect_false (preparecnt))
565	{	966	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	967	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	968	call_pending (EV_A);
568	}	969	}
569		970
570	/* update fd-related kernel structures */	971	/* update fd-related kernel structures */
571	fd_reify ();	972	fd_reify (EV_A);
572		973
573	/* calculate blocking time */	974	/* calculate blocking time */
574		975
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	976	/* we only need this for !monotonic clockor timers, but as we basically
		977	always have timers, we just calculate it always */
		978	#if EV_USE_MONOTONIC
		979	if (expect_true (have_monotonic))
		980	time_update_monotonic (EV_A);
		981	else
		982	#endif
		983	{
576	ev_now = ev_time ();	984	rt_now = ev_time ();
		985	mn_now = rt_now;
		986	}
577		987
578	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	988	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
579	block = 0.;	989	block = 0.;
580	else	990	else
581	{	991	{
582	block = MAX_BLOCKTIME;	992	block = MAX_BLOCKTIME;
583		993
584	if (timercnt)	994	if (timercnt)
585	{	995	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	996	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
587	if (block > to) block = to;	997	if (block > to) block = to;
588	}	998	}
589		999
590	if (periodiccnt)	1000	if (periodiccnt)
591	{	1001	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1002	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
593	if (block > to) block = to;	1003	if (block > to) block = to;
594	}	1004	}
595		1005
596	if (block < 0.) block = 0.;	1006	if (block < 0.) block = 0.;
597	}	1007	}
598		1008
599	method_poll (block);	1009	method_poll (EV_A_ block);
600		1010
601	/* update ev_now, do magic */	1011	/* update rt_now, do magic */
602	time_update ();	1012	time_update (EV_A);
603		1013
604	/* queue pending timers and reschedule them */	1014	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1015	timers_reify (EV_A); /* relative timers called last */
606	periodics_reify (); /* absolute timers called first */	1016	periodics_reify (EV_A); /* absolute timers called first */
607		1017
608	/* queue idle watchers unless io or timers are pending */	1018	/* queue idle watchers unless io or timers are pending */
609	if (!pendingcnt)	1019	if (!pendingcnt)
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1020	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		1021
612	/* queue check watchers, to be executed first */	1022	/* queue check watchers, to be executed first */
613	if (checkcnt)	1023	if (checkcnt)
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1024	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1025
616	call_pending ();	1026	call_pending (EV_A);
617	}	1027	}
618	while (!ev_loop_done);	1028	while (activecnt && !loop_done);
619		1029
620	if (ev_loop_done != 2)	1030	if (loop_done != 2)
621	ev_loop_done = 0;	1031	loop_done = 0;
		1032	}
		1033
		1034	void
		1035	ev_unloop (EV_P_ int how)
		1036	{
		1037	loop_done = how;
622	}	1038	}
623		1039
624	/*****************************************************************************/	1040	/*****************************************************************************/
625		1041
626	static void	1042	inline void
627	wlist_add (WL *head, WL elem)	1043	wlist_add (WL *head, WL elem)
628	{	1044	{
629	elem->next = *head;	1045	elem->next = *head;
630	*head = elem;	1046	*head = elem;
631	}	1047	}
632		1048
633	static void	1049	inline void
634	wlist_del (WL *head, WL elem)	1050	wlist_del (WL *head, WL elem)
635	{	1051	{
636	while (*head)	1052	while (*head)
637	{	1053	{
638	if (*head == elem)	1054	if (*head == elem)
…		…
643		1059
644	head = &(*head)->next;	1060	head = &(*head)->next;
645	}	1061	}
646	}	1062	}
647		1063
648	static void	1064	inline void
649	ev_clear (W w)	1065	ev_clear_pending (EV_P_ W w)
650	{	1066	{
651	if (w->pending)	1067	if (w->pending)
652	{	1068	{
653	pendings [w->pending - 1].w = 0;	1069	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1070	w->pending = 0;
655	}	1071	}
656	}	1072	}
657		1073
658	static void	1074	inline void
659	ev_start (W w, int active)	1075	ev_start (EV_P_ W w, int active)
660	{	1076	{
		1077	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1078	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1079
661	w->active = active;	1080	w->active = active;
		1081	ev_ref (EV_A);
662	}	1082	}
663		1083
664	static void	1084	inline void
665	ev_stop (W w)	1085	ev_stop (EV_P_ W w)
666	{	1086	{
		1087	ev_unref (EV_A);
667	w->active = 0;	1088	w->active = 0;
668	}	1089	}
669		1090
670	/*****************************************************************************/	1091	/*****************************************************************************/
671		1092
672	void	1093	void
673	evio_start (struct ev_io *w)	1094	ev_io_start (EV_P_ struct ev_io *w)
674	{	1095	{
		1096	int fd = w->fd;
		1097
675	if (ev_is_active (w))	1098	if (ev_is_active (w))
676	return;	1099	return;
677		1100
678	int fd = w->fd;	1101	assert (("ev_io_start called with negative fd", fd >= 0));
679		1102
680	ev_start ((W)w, 1);	1103	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1104	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1105	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1106
684	++fdchangecnt;	1107	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1108	}
688		1109
689	void	1110	void
690	evio_stop (struct ev_io *w)	1111	ev_io_stop (EV_P_ struct ev_io *w)
691	{	1112	{
692	ev_clear ((W)w);	1113	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1114	if (!ev_is_active (w))
694	return;	1115	return;
695		1116
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1117	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1118	ev_stop (EV_A_ (W)w);
698		1119
699	++fdchangecnt;	1120	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1121	}
703		1122
704	void	1123	void
705	evtimer_start (struct ev_timer *w)	1124	ev_timer_start (EV_P_ struct ev_timer *w)
706	{	1125	{
707	if (ev_is_active (w))	1126	if (ev_is_active (w))
708	return;	1127	return;
709		1128
710	w->at += now;	1129	w->at += mn_now;
711		1130
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1131	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1132
714	ev_start ((W)w, ++timercnt);	1133	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1134	array_needsize (timers, timermax, timercnt, );
716	timers [timercnt - 1] = w;	1135	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1136	upheap ((WT *)timers, timercnt - 1);
718	}
719		1137
		1138	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1139	}
		1140
720	void	1141	void
721	evtimer_stop (struct ev_timer *w)	1142	ev_timer_stop (EV_P_ struct ev_timer *w)
722	{	1143	{
723	ev_clear ((W)w);	1144	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1145	if (!ev_is_active (w))
725	return;	1146	return;
726		1147
		1148	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1149
727	if (w->active < timercnt--)	1150	if (((W)w)->active < timercnt--)
728	{	1151	{
729	timers [w->active - 1] = timers [timercnt];	1152	timers [((W)w)->active - 1] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1153	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1154	}
732		1155
733	w->at = w->repeat;	1156	w->at = w->repeat;
734		1157
735	ev_stop ((W)w);	1158	ev_stop (EV_A_ (W)w);
736	}	1159	}
737		1160
738	void	1161	void
739	evtimer_again (struct ev_timer *w)	1162	ev_timer_again (EV_P_ struct ev_timer *w)
740	{	1163	{
741	if (ev_is_active (w))	1164	if (ev_is_active (w))
742	{	1165	{
743	if (w->repeat)	1166	if (w->repeat)
744	{	1167	{
745	w->at = now + w->repeat;	1168	w->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1169	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1170	}
748	else	1171	else
749	evtimer_stop (w);	1172	ev_timer_stop (EV_A_ w);
750	}	1173	}
751	else if (w->repeat)	1174	else if (w->repeat)
752	evtimer_start (w);	1175	ev_timer_start (EV_A_ w);
753	}	1176	}
754		1177
755	void	1178	void
756	evperiodic_start (struct ev_periodic *w)	1179	ev_periodic_start (EV_P_ struct ev_periodic *w)
757	{	1180	{
758	if (ev_is_active (w))	1181	if (ev_is_active (w))
759	return;	1182	return;
760		1183
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1184	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
762		1185
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1186	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)	1187	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1188	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
766		1189
767	ev_start ((W)w, ++periodiccnt);	1190	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1191	array_needsize (periodics, periodicmax, periodiccnt, );
769	periodics [periodiccnt - 1] = w;	1192	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1193	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1194
		1195	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1196	}
		1197
773	void	1198	void
774	evperiodic_stop (struct ev_periodic *w)	1199	ev_periodic_stop (EV_P_ struct ev_periodic *w)
775	{	1200	{
776	ev_clear ((W)w);	1201	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1202	if (!ev_is_active (w))
778	return;	1203	return;
779		1204
		1205	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1206
780	if (w->active < periodiccnt--)	1207	if (((W)w)->active < periodiccnt--)
781	{	1208	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1209	periodics [((W)w)->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1210	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
784	}	1211	}
785		1212
786	ev_stop ((W)w);	1213	ev_stop (EV_A_ (W)w);
787	}	1214	}
788		1215
789	void	1216	void
790	evsignal_start (struct ev_signal *w)	1217	ev_idle_start (EV_P_ struct ev_idle *w)
791	{	1218	{
792	if (ev_is_active (w))	1219	if (ev_is_active (w))
793	return;	1220	return;
794		1221
		1222	ev_start (EV_A_ (W)w, ++idlecnt);
		1223	array_needsize (idles, idlemax, idlecnt, );
		1224	idles [idlecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_idle_stop (EV_P_ struct ev_idle *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	idles [((W)w)->active - 1] = idles [--idlecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++preparecnt);
		1245	array_needsize (prepares, preparemax, preparecnt, );
		1246	prepares [preparecnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	void
		1261	ev_check_start (EV_P_ struct ev_check *w)
		1262	{
		1263	if (ev_is_active (w))
		1264	return;
		1265
		1266	ev_start (EV_A_ (W)w, ++checkcnt);
		1267	array_needsize (checks, checkmax, checkcnt, );
		1268	checks [checkcnt - 1] = w;
		1269	}
		1270
		1271	void
		1272	ev_check_stop (EV_P_ struct ev_check *w)
		1273	{
		1274	ev_clear_pending (EV_A_ (W)w);
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	checks [((W)w)->active - 1] = checks [--checkcnt];
		1279	ev_stop (EV_A_ (W)w);
		1280	}
		1281
		1282	#ifndef SA_RESTART
		1283	# define SA_RESTART 0
		1284	#endif
		1285
		1286	void
		1287	ev_signal_start (EV_P_ struct ev_signal *w)
		1288	{
		1289	#if EV_MULTIPLICITY
		1290	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1291	#endif
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1296
795	ev_start ((W)w, 1);	1297	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1298	array_needsize (signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1299	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1300
799	if (!w->next)	1301	if (!w->next)
800	{	1302	{
801	struct sigaction sa;	1303	struct sigaction sa;
802	sa.sa_handler = sighandler;	1304	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1305	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1306	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1307	sigaction (w->signum, &sa, 0);
806	}	1308	}
807	}	1309	}
808		1310
809	void	1311	void
810	evsignal_stop (struct ev_signal *w)	1312	ev_signal_stop (EV_P_ struct ev_signal *w)
811	{	1313	{
812	ev_clear ((W)w);	1314	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1315	if (!ev_is_active (w))
814	return;	1316	return;
815		1317
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1318	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1319	ev_stop (EV_A_ (W)w);
818		1320
819	if (!signals [w->signum - 1].head)	1321	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1322	signal (w->signum, SIG_DFL);
821	}	1323	}
822		1324
823	void evidle_start (struct ev_idle *w)	1325	void
		1326	ev_child_start (EV_P_ struct ev_child *w)
824	{	1327	{
		1328	#if EV_MULTIPLICITY
		1329	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1330	#endif
825	if (ev_is_active (w))	1331	if (ev_is_active (w))
826	return;	1332	return;
827		1333
828	ev_start ((W)w, ++idlecnt);	1334	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1335	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1336	}
832		1337
833	void evidle_stop (struct ev_idle *w)	1338	void
		1339	ev_child_stop (EV_P_ struct ev_child *w)
834	{	1340	{
835	ev_clear ((W)w);	1341	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1342	if (ev_is_active (w))
837	return;	1343	return;
838		1344
839	idles [w->active - 1] = idles [--idlecnt];	1345	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1346	ev_stop (EV_A_ (W)w);
841	}
842
843	void evprepare_start (struct ev_prepare *w)
844	{
845	if (ev_is_active (w))
846	return;
847
848	ev_start ((W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );
850	prepares [preparecnt - 1] = w;
851	}
852
853	void evprepare_stop (struct ev_prepare *w)
854	{
855	ev_clear ((W)w);
856	if (ev_is_active (w))
857	return;
858
859	prepares [w->active - 1] = prepares [--preparecnt];
860	ev_stop ((W)w);
861	}
862
863	void evcheck_start (struct ev_check *w)
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );
870	checks [checkcnt - 1] = w;
871	}
872
873	void evcheck_stop (struct ev_check *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	checks [w->active - 1] = checks [--checkcnt];
880	ev_stop ((W)w);
881	}	1347	}
882		1348
883	/*****************************************************************************/	1349	/*****************************************************************************/
884		1350
885	struct ev_once	1351	struct ev_once
…		…
889	void (cb)(int revents, void arg);	1355	void (cb)(int revents, void arg);
890	void *arg;	1356	void *arg;
891	};	1357	};
892		1358
893	static void	1359	static void
894	once_cb (struct ev_once *once, int revents)	1360	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1361	{
896	void (cb)(int revents, void arg) = once->cb;	1362	void (cb)(int revents, void arg) = once->cb;
897	void *arg = once->arg;	1363	void *arg = once->arg;
898		1364
899	evio_stop (&once->io);	1365	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1366	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1367	free (once);
902		1368
903	cb (revents, arg);	1369	cb (revents, arg);
904	}	1370	}
905		1371
906	static void	1372	static void
907	once_cb_io (struct ev_io *w, int revents)	1373	once_cb_io (EV_P_ struct ev_io *w, int revents)
908	{	1374	{
909	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1375	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
910	}	1376	}
911		1377
912	static void	1378	static void
913	once_cb_to (struct ev_timer *w, int revents)	1379	once_cb_to (EV_P_ struct ev_timer *w, int revents)
914	{	1380	{
915	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1381	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
916	}	1382	}
917		1383
918	void	1384	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1385	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
920	{	1386	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1387	struct ev_once *once = malloc (sizeof (struct ev_once));
922		1388
923	if (!once)	1389	if (!once)
924	cb (EV_ERROR, arg);	1390	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
925	else	1391	else
926	{	1392	{
927	once->cb = cb;	1393	once->cb = cb;
928	once->arg = arg;	1394	once->arg = arg;
929		1395
930	evw_init (&once->io, once_cb_io);	1396	ev_watcher_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1397	if (fd >= 0)
933	{	1398	{
934	evio_set (&once->io, fd, events);	1399	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1400	ev_io_start (EV_A_ &once->io);
936	}	1401	}
937		1402
938	evw_init (&once->to, once_cb_to);	1403	ev_watcher_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1404	if (timeout >= 0.)
941	{	1405	{
942	evtimer_set (&once->to, timeout, 0.);	1406	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1407	ev_timer_start (EV_A_ &once->to);
944	}	1408	}
945	}	1409	}
946	}	1410	}
947		1411
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}
1025
1026	#endif
1027
1028
1029
1030

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Comparing libev/ev.c (file contents): Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs. Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC