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

Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 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
44	#define HAVE_EPOLL 1	75	/**/
45		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
		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_REALTIME
		98	# define EV_USE_REALTIME 1
		99	#endif
		100
		101	/**/
		102
47	# ifdef CLOCK_MONOTONIC	103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	105	# define EV_USE_MONOTONIC 0
49	# endif	106	#endif
50	#endif
51		107
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	108	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
62	#endif	111	#endif
		112
		113	/**/
63		114
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	116	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		117	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		118	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
66		119
67	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
68		135
69	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
72		139
73	static ev_tstamp now, diff; /* monotonic clock */	140	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
74	ev_tstamp ev_now;
75	int ev_method;
76
77	static int have_monotonic; /* runtime */
78
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		141
83	/*****************************************************************************/	142	/*****************************************************************************/
84		143
85	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
86	ev_time (void)	178	ev_time (void)
87	{	179	{
88	#if HAVE_REALTIME	180	#if EV_USE_REALTIME
89	struct timespec ts;	181	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	183	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	184	#else
93	struct timeval tv;	185	struct timeval tv;
94	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	188	#endif
97	}	189	}
98		190
99	static ev_tstamp	191	inline ev_tstamp
100	get_clock (void)	192	get_clock (void)
101	{	193	{
102	#if HAVE_MONOTONIC	194	#if EV_USE_MONOTONIC
103	if (have_monotonic)	195	if (expect_true (have_monotonic))
104	{	196	{
105	struct timespec ts;	197	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	200	}
109	#endif	201	#endif
110		202
111	return ev_time ();	203	return ev_time ();
112	}	204	}
113		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
		212	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		213
114	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
115	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
116	{ \	216	{ \
117	int newcnt = cur ? cur << 1 : 16; \	217	int newcnt = cur; \
		218	do \
		219	{ \
		220	newcnt = array_roundsize (base, newcnt << 1); \
		221	} \
		222	while ((cnt) > newcnt); \
		223	\
118	base = realloc (base, sizeof (base) (newcnt)); \	224	base = realloc (base, sizeof (base) (newcnt)); \
119	init (base + cur, newcnt - cur); \	225	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	226	cur = newcnt; \
121	}	227	}
122		228
123	/*****************************************************************************/	229	/*****************************************************************************/
124		230
125	typedef struct
126	{
127	struct ev_io *head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void	231	static void
138	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
139	{	233	{
140	while (count--)	234	while (count--)
141	{	235	{
142	base->head = 0;	236	base->head = 0;
143	base->wev = base->rev = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
144	++base;	240	++base;
145	}	241	}
146	}	242	}
147		243
148	typedef struct
149	{
150	W w;
151	int events;
152	} ANPENDING;
153
154	static ANPENDING *pendings;
155	static int pendingmax, pendingcnt;
156
157	static void	244	static void
158	event (W w, int events)	245	event (EV_P_ W w, int events)
159	{	246	{
160	if (w->active)	247	if (w->pending)
161	{	248	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	249	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		250	return;
166	}	251	}
167	}
168		252
		253	w->pending = ++pendingcnt [ABSPRI (w)];
		254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		255	pendings [ABSPRI (w)][w->pending - 1].w = w;
		256	pendings [ABSPRI (w)][w->pending - 1].events = events;
		257	}
		258
169	static void	259	static void
		260	queue_events (EV_P_ W *events, int eventcnt, int type)
		261	{
		262	int i;
		263
		264	for (i = 0; i < eventcnt; ++i)
		265	event (EV_A_ events [i], type);
		266	}
		267
		268	static void
170	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
171	{	270	{
172	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	272	struct ev_io *w;
174		273
175	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
176	{	275	{
177	int ev = w->events & events;	276	int ev = w->events & events;
178		277
179	if (ev)	278	if (ev)
180	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
181	}	280	}
182	}	281	}
183		282
		283	/*****************************************************************************/
		284
184	static void	285	static void
185	queue_events (W *events, int eventcnt, int type)	286	fd_reify (EV_P)
186	{	287	{
187	int i;	288	int i;
188		289
189	for (i = 0; i < eventcnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	291	{
		292	int fd = fdchanges [i];
		293	ANFD *anfd = anfds + fd;
		294	struct ev_io *w;
		295
		296	int events = 0;
		297
		298	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		299	events \|= w->events;
		300
		301	anfd->reify = 0;
		302
		303	if (anfd->events != events)
		304	{
		305	method_modify (EV_A_ fd, anfd->events, events);
		306	anfd->events = events;
		307	}
		308	}
		309
		310	fdchangecnt = 0;
		311	}
		312
		313	static void
		314	fd_change (EV_P_ int fd)
		315	{
		316	if (anfds [fd].reify \|\| fdchangecnt < 0)
		317	return;
		318
		319	anfds [fd].reify = 1;
		320
		321	++fdchangecnt;
		322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		323	fdchanges [fdchangecnt - 1] = fd;
		324	}
		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		335	}
		336	}
		337
		338	/* called on EBADF to verify fds */
		339	static void
		340	fd_ebadf (EV_P)
		341	{
		342	int fd;
		343
		344	for (fd = 0; fd < anfdmax; ++fd)
		345	if (anfds [fd].events)
		346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
		358	{
		359	close (fd);
		360	fd_kill (EV_A_ fd);
		361	return;
		362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
191	}	378	}
192		379
193	/*****************************************************************************/	380	/*****************************************************************************/
194		381
195	static struct ev_timer **timers;
196	static int timermax, timercnt;
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void	382	static void
202	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
203	{	384	{
204	WT w = timers [k];	385	WT w = heap [k];
205		386
206	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
207	{	388	{
208	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
210	k >>= 1;	391	k >>= 1;
211	}	392	}
212		393
213	timers [k] = w;	394	heap [k] = w;
214	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
215		396
216	}	397	}
217		398
218	static void	399	static void
219	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
220	{	401	{
221	WT w = timers [k];	402	WT w = heap [k];
222		403
223	while (k < (N >> 1))	404	while (k < (N >> 1))
224	{	405	{
225	int j = k << 1;	406	int j = k << 1;
226		407
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	409	++j;
229		410
230	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
231	break;	412	break;
232		413
233	timers [k] = timers [j];	414	heap [k] = heap [j];
234	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
235	k = j;	416	k = j;
236	}	417	}
237		418
238	timers [k] = w;	419	heap [k] = w;
239	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
240	}	421	}
241		422
242	/*****************************************************************************/	423	/*****************************************************************************/
243		424
244	typedef struct	425	typedef struct
245	{	426	{
246	struct ev_signal *head;	427	struct ev_watcher_list *head;
247	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
248	} ANSIG;	429	} ANSIG;
249		430
250	static ANSIG *signals;	431	static ANSIG *signals;
251	static int signalmax;	432	static int signalmax;
252		433
253	static int sigpipe [2];	434	static int sigpipe [2];
254	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	436	static struct ev_io sigev;
256		437
257	static void	438	static void
258	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
259	{	440	{
260	while (count--)	441	while (count--)
261	{	442	{
262	base->head = 0;	443	base->head = 0;
263	base->gotsig = 0;	444	base->gotsig = 0;
		445
264	++base;	446	++base;
265	}	447	}
266	}	448	}
267		449
268	static void	450	static void
…		…
270	{	452	{
271	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
272		454
273	if (!gotsig)	455	if (!gotsig)
274	{	456	{
		457	int old_errno = errno;
275	gotsig = 1;	458	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
277	}	461	}
278	}	462	}
279		463
280	static void	464	static void
281	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	466	{
283	struct ev_signal *w;	467	struct ev_watcher_list *w;
284	int sig;	468	int signum;
285		469
		470	read (sigpipe [0], &revents, 1);
286	gotsig = 0;	471	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		472
289	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
291	{	475	{
292	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
293		477
294	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
296	}	480	}
297	}	481	}
298		482
299	static void	483	static void
300	siginit (void)	484	siginit (EV_P)
301	{	485	{
		486	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		489
305	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
308		494
309	evio_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	498	}
312		499
313	/*****************************************************************************/	500	/*****************************************************************************/
314		501
315	static struct ev_idle **idles;	502	#ifndef WIN32
316	static int idlemax, idlecnt;
317		503
318	static struct ev_check **checks;	504	static struct ev_child *childs [PID_HASHSIZE];
319	static int checkmax, checkcnt;	505	static struct ev_signal childev;
		506
		507	#ifndef WCONTINUED
		508	# define WCONTINUED 0
		509	#endif
		510
		511	static void
		512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		513	{
		514	struct ev_child *w;
		515
		516	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		517	if (w->pid == pid \|\| !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it now */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
		529	int pid, status;
		530
		531	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		532	{
		533	/* make sure we are called again until all childs have been reaped */
		534	event (EV_A_ (W)sw, EV_SIGNAL);
		535
		536	child_reap (EV_A_ sw, pid, pid, status);
		537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
		539	}
		540
		541	#endif
320		542
321	/*****************************************************************************/	543	/*****************************************************************************/
322		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
323	#if HAVE_EPOLL	548	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	549	# include "ev_epoll.c"
325	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
326	#if HAVE_SELECT	554	#if EV_USE_SELECT
327	# include "ev_select.c"	555	# include "ev_select.c"
328	#endif	556	#endif
329		557
330	int ev_init (int flags)	558	int
		559	ev_version_major (void)
331	{	560	{
		561	return EV_VERSION_MAJOR;
		562	}
		563
		564	int
		565	ev_version_minor (void)
		566	{
		567	return EV_VERSION_MINOR;
		568	}
		569
		570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
		573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	\|\| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
		591	if (!method)
		592	{
332	#if HAVE_MONOTONIC	593	#if EV_USE_MONOTONIC
333	{	594	{
334	struct timespec ts;	595	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	597	have_monotonic = 1;
337	}	598	}
338	#endif	599	#endif
339		600
340	ev_now = ev_time ();	601	rt_now = ev_time ();
341	now = get_clock ();	602	mn_now = get_clock ();
342	diff = ev_now - now;	603	now_floor = mn_now;
		604	rtmn_diff = rt_now - mn_now;
343		605
		606	if (methods == EVMETHOD_AUTO)
		607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
		610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
		616	#if EV_USE_EPOLL
		617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		621	#endif
		622	#if EV_USE_SELECT
		623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		624	#endif
		625	}
		626	}
		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/TODO/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/TODO/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
344	if (pipe (sigpipe))	702	if (pipe (sigpipe))
345	return 0;	703	return 0;
346		704
347	ev_method = EVMETHOD_NONE;	705	if (!default_loop)
348	#if HAVE_EPOLL
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354
355	if (ev_method)
356	{	706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
		715	if (ev_method (EV_A))
		716	{
357	evw_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
358	siginit ();	719	siginit (EV_A);
359	}
360		720
361	return ev_method;	721	#ifndef WIN32
362	}	722	ev_signal_init (&childev, childcb, SIGCHLD);
363		723	ev_set_priority (&childev, EV_MAXPRI);
364	/*****************************************************************************/	724	ev_signal_start (EV_A_ &childev);
365		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
366	void ev_prefork (void)
367	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif	726	#endif
		727	}
		728	else
		729	default_loop = 0;
		730	}
382		731
		732	return default_loop;
		733	}
		734
		735	void
		736	ev_default_destroy (void)
		737	{
		738	#if EV_MULTIPLICITY
		739	struct ev_loop *loop = default_loop;
		740	#endif
		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
383	evio_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
384	close (sigpipe [0]);	764	close (sigpipe [0]);
385	close (sigpipe [1]);	765	close (sigpipe [1]);
386	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
387	siginit ();	769	siginit (EV_A);
388	}	770	}
389		771
390	/*****************************************************************************/	772	/*****************************************************************************/
391		773
392	static void	774	static void
393	fd_reify (void)	775	call_pending (EV_P)
394	{	776	{
395	int i;	777	int pri;
396		778
397	for (i = 0; i < fdchangecnt; ++i)	779	for (pri = NUMPRI; pri--; )
398	{	780	while (pendingcnt [pri])
399	int fd = fdchanges [i];
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402
403	int wev = 0;
404
405	for (w = anfd->head; w; w = w->next)
406	wev \|= w->events;
407
408	if (anfd->wev != wev)
409	{	781	{
410	method_modify (fd, anfd->wev, wev);	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
411	anfd->wev = wev;
412	}
413	}
414		783
415	fdchangecnt = 0;
416	}
417
418	static void
419	call_pending ()
420	{
421	int i;
422
423	for (i = 0; i < pendingcnt; ++i)
424	{
425	ANPENDING *p = pendings + i;
426
427	if (p->w)	784	if (p->w)
428	{	785	{
429	p->w->pending = 0;	786	p->w->pending = 0;
430	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
431	}	788	}
432	}	789	}
433
434	pendingcnt = 0;
435	}	790	}
436		791
437	static void	792	static void
438	timers_reify ()	793	timers_reify (EV_P)
439	{	794	{
440	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
441	{	796	{
442	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
443		798
444	event ((W)w, EV_TIMEOUT);	799	assert (("inactive timer on timer heap detected", ev_is_active (w)));
445		800
446	/* first reschedule or stop timer */	801	/* first reschedule or stop timer */
447	if (w->repeat)	802	if (w->repeat)
448	{	803	{
		804	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
449	w->at = now + w->repeat;	805	w->at = mn_now + w->repeat;
450	assert (("timer timeout in the past, negative repeat?", w->at > now));
451	downheap ((WT *)timers, timercnt, 0);	806	downheap ((WT *)timers, timercnt, 0);
452	}	807	}
453	else	808	else
454	evtimer_stop (w); /* nonrepeating: stop timer */	809	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455	}
456	}
457		810
		811	event (EV_A_ (W)w, EV_TIMEOUT);
		812	}
		813	}
		814
458	static void	815	static void
459	periodics_reify ()	816	periodics_reify (EV_P)
460	{	817	{
461	while (periodiccnt && periodics [0]->at <= ev_now)	818	while (periodiccnt && periodics [0]->at <= rt_now)
462	{	819	{
463	struct ev_periodic *w = periodics [0];	820	struct ev_periodic *w = periodics [0];
		821
		822	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
464		823
465	/* first reschedule or stop timer */	824	/* first reschedule or stop timer */
466	if (w->interval)	825	if (w->interval)
467	{	826	{
468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	827	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
469	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	828	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
470	downheap ((WT *)periodics, periodiccnt, 0);	829	downheap ((WT *)periodics, periodiccnt, 0);
471	}	830	}
472	else	831	else
473	evperiodic_stop (w); /* nonrepeating: stop timer */	832	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474		833
475	event ((W)w, EV_TIMEOUT);	834	event (EV_A_ (W)w, EV_PERIODIC);
476	}	835	}
477	}	836	}
478		837
479	static void	838	static void
480	periodics_reschedule (ev_tstamp diff)	839	periodics_reschedule (EV_P)
481	{	840	{
482	int i;	841	int i;
483		842
484	/* adjust periodics after time jump */	843	/* adjust periodics after time jump */
485	for (i = 0; i < periodiccnt; ++i)	844	for (i = 0; i < periodiccnt; ++i)
486	{	845	{
487	struct ev_periodic *w = periodics [i];	846	struct ev_periodic *w = periodics [i];
488		847
489	if (w->interval)	848	if (w->interval)
490	{	849	{
491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	850	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
492		851
493	if (fabs (diff) >= 1e-4)	852	if (fabs (diff) >= 1e-4)
494	{	853	{
495	evperiodic_stop (w);	854	ev_periodic_stop (EV_A_ w);
496	evperiodic_start (w);	855	ev_periodic_start (EV_A_ w);
497		856
498	i = 0; /* restart loop, inefficient, but time jumps should be rare */	857	i = 0; /* restart loop, inefficient, but time jumps should be rare */
499	}	858	}
500	}	859	}
501	}	860	}
502	}	861	}
503		862
		863	inline int
		864	time_update_monotonic (EV_P)
		865	{
		866	mn_now = get_clock ();
		867
		868	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		869	{
		870	rt_now = rtmn_diff + mn_now;
		871	return 0;
		872	}
		873	else
		874	{
		875	now_floor = mn_now;
		876	rt_now = ev_time ();
		877	return 1;
		878	}
		879	}
		880
504	static void	881	static void
505	time_update ()	882	time_update (EV_P)
506	{	883	{
507	int i;	884	int i;
508		885
509	ev_now = ev_time ();	886	#if EV_USE_MONOTONIC
510
511	if (have_monotonic)	887	if (expect_true (have_monotonic))
512	{	888	{
513	ev_tstamp odiff = diff;	889	if (time_update_monotonic (EV_A))
514
515	for (i = 4; --i; ) /* loop a few times, before making important decisions */
516	{	890	{
517	now = get_clock ();	891	ev_tstamp odiff = rtmn_diff;
		892
		893	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		894	{
518	diff = ev_now - now;	895	rtmn_diff = rt_now - mn_now;
519		896
520	if (fabs (odiff - diff) < MIN_TIMEJUMP)	897	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
521	return; /* all is well */	898	return; /* all is well */
522		899
523	ev_now = ev_time ();	900	rt_now = ev_time ();
		901	mn_now = get_clock ();
		902	now_floor = mn_now;
		903	}
		904
		905	periodics_reschedule (EV_A);
		906	/* no timer adjustment, as the monotonic clock doesn't jump */
		907	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
524	}	908	}
525
526	periodics_reschedule (diff - odiff);
527	/* no timer adjustment, as the monotonic clock doesn't jump */
528	}	909	}
529	else	910	else
		911	#endif
530	{	912	{
531	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	913	rt_now = ev_time ();
		914
		915	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
532	{	916	{
533	periodics_reschedule (ev_now - now);	917	periodics_reschedule (EV_A);
534		918
535	/* adjust timers. this is easy, as the offset is the same for all */	919	/* adjust timers. this is easy, as the offset is the same for all */
536	for (i = 0; i < timercnt; ++i)	920	for (i = 0; i < timercnt; ++i)
537	timers [i]->at += diff;	921	timers [i]->at += rt_now - mn_now;
538	}	922	}
539		923
540	now = ev_now;	924	mn_now = rt_now;
541	}	925	}
542	}	926	}
543		927
544	int ev_loop_done;	928	void
		929	ev_ref (EV_P)
		930	{
		931	++activecnt;
		932	}
545		933
		934	void
		935	ev_unref (EV_P)
		936	{
		937	--activecnt;
		938	}
		939
		940	static int loop_done;
		941
		942	void
546	void ev_loop (int flags)	943	ev_loop (EV_P_ int flags)
547	{	944	{
548	double block;	945	double block;
549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	946	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
550
551	if (checkcnt)
552	{
553	queue_events ((W *)checks, checkcnt, EV_CHECK);
554	call_pending ();
555	}
556		947
557	do	948	do
558	{	949	{
		950	/* queue check watchers (and execute them) */
		951	if (expect_false (preparecnt))
		952	{
		953	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		954	call_pending (EV_A);
		955	}
		956
559	/* update fd-related kernel structures */	957	/* update fd-related kernel structures */
560	fd_reify ();	958	fd_reify (EV_A);
561		959
562	/* calculate blocking time */	960	/* calculate blocking time */
563		961
564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	962	/* we only need this for !monotonic clockor timers, but as we basically
		963	always have timers, we just calculate it always */
		964	#if EV_USE_MONOTONIC
		965	if (expect_true (have_monotonic))
		966	time_update_monotonic (EV_A);
		967	else
		968	#endif
		969	{
565	ev_now = ev_time ();	970	rt_now = ev_time ();
		971	mn_now = rt_now;
		972	}
566		973
567	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	974	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
568	block = 0.;	975	block = 0.;
569	else	976	else
570	{	977	{
571	block = MAX_BLOCKTIME;	978	block = MAX_BLOCKTIME;
572		979
573	if (timercnt)	980	if (timercnt)
574	{	981	{
575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	982	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
576	if (block > to) block = to;	983	if (block > to) block = to;
577	}	984	}
578		985
579	if (periodiccnt)	986	if (periodiccnt)
580	{	987	{
581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	988	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
582	if (block > to) block = to;	989	if (block > to) block = to;
583	}	990	}
584		991
585	if (block < 0.) block = 0.;	992	if (block < 0.) block = 0.;
586	}	993	}
587		994
588	method_poll (block);	995	method_poll (EV_A_ block);
589		996
590	/* update ev_now, do magic */	997	/* update rt_now, do magic */
591	time_update ();	998	time_update (EV_A);
592		999
593	/* queue pending timers and reschedule them */	1000	/* queue pending timers and reschedule them */
		1001	timers_reify (EV_A); /* relative timers called last */
594	periodics_reify (); /* absolute timers first */	1002	periodics_reify (EV_A); /* absolute timers called first */
595	timers_reify (); /* relative timers second */
596		1003
597	/* queue idle watchers unless io or timers are pending */	1004	/* queue idle watchers unless io or timers are pending */
598	if (!pendingcnt)	1005	if (!pendingcnt)
599	queue_events ((W *)idles, idlecnt, EV_IDLE);	1006	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
600		1007
601	/* queue check and possibly idle watchers */	1008	/* queue check watchers, to be executed first */
		1009	if (checkcnt)
602	queue_events ((W *)checks, checkcnt, EV_CHECK);	1010	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603		1011
604	call_pending ();	1012	call_pending (EV_A);
605	}	1013	}
606	while (!ev_loop_done);	1014	while (activecnt && !loop_done);
607		1015
608	if (ev_loop_done != 2)	1016	if (loop_done != 2)
609	ev_loop_done = 0;	1017	loop_done = 0;
		1018	}
		1019
		1020	void
		1021	ev_unloop (EV_P_ int how)
		1022	{
		1023	loop_done = how;
610	}	1024	}
611		1025
612	/*****************************************************************************/	1026	/*****************************************************************************/
613		1027
614	static void	1028	inline void
615	wlist_add (WL *head, WL elem)	1029	wlist_add (WL *head, WL elem)
616	{	1030	{
617	elem->next = *head;	1031	elem->next = *head;
618	*head = elem;	1032	*head = elem;
619	}	1033	}
620		1034
621	static void	1035	inline void
622	wlist_del (WL *head, WL elem)	1036	wlist_del (WL *head, WL elem)
623	{	1037	{
624	while (*head)	1038	while (*head)
625	{	1039	{
626	if (*head == elem)	1040	if (*head == elem)
…		…
631		1045
632	head = &(*head)->next;	1046	head = &(*head)->next;
633	}	1047	}
634	}	1048	}
635		1049
636	static void	1050	inline void
637	ev_clear (W w)	1051	ev_clear_pending (EV_P_ W w)
638	{	1052	{
639	if (w->pending)	1053	if (w->pending)
640	{	1054	{
641	pendings [w->pending - 1].w = 0;	1055	pendings [ABSPRI (w)][w->pending - 1].w = 0;
642	w->pending = 0;	1056	w->pending = 0;
643	}	1057	}
644	}	1058	}
645		1059
646	static void	1060	inline void
647	ev_start (W w, int active)	1061	ev_start (EV_P_ W w, int active)
648	{	1062	{
		1063	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1064	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1065
649	w->active = active;	1066	w->active = active;
		1067	ev_ref (EV_A);
650	}	1068	}
651		1069
652	static void	1070	inline void
653	ev_stop (W w)	1071	ev_stop (EV_P_ W w)
654	{	1072	{
		1073	ev_unref (EV_A);
655	w->active = 0;	1074	w->active = 0;
656	}	1075	}
657		1076
658	/*****************************************************************************/	1077	/*****************************************************************************/
659		1078
660	void	1079	void
661	evio_start (struct ev_io *w)	1080	ev_io_start (EV_P_ struct ev_io *w)
662	{	1081	{
		1082	int fd = w->fd;
		1083
663	if (ev_is_active (w))	1084	if (ev_is_active (w))
664	return;	1085	return;
665		1086
666	int fd = w->fd;	1087	assert (("ev_io_start called with negative fd", fd >= 0));
667		1088
668	ev_start ((W)w, 1);	1089	ev_start (EV_A_ (W)w, 1);
669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1090	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
670	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1091	wlist_add ((WL *)&anfds[fd].head, (WL)w);
671		1092
672	++fdchangecnt;	1093	fd_change (EV_A_ fd);
673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674	fdchanges [fdchangecnt - 1] = fd;
675	}	1094	}
676		1095
677	void	1096	void
678	evio_stop (struct ev_io *w)	1097	ev_io_stop (EV_P_ struct ev_io *w)
679	{	1098	{
680	ev_clear ((W)w);	1099	ev_clear_pending (EV_A_ (W)w);
681	if (!ev_is_active (w))	1100	if (!ev_is_active (w))
682	return;	1101	return;
683		1102
684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1103	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
686		1105
687	++fdchangecnt;	1106	fd_change (EV_A_ w->fd);
688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689	fdchanges [fdchangecnt - 1] = w->fd;
690	}	1107	}
691		1108
692	void	1109	void
693	evtimer_start (struct ev_timer *w)	1110	ev_timer_start (EV_P_ struct ev_timer *w)
694	{	1111	{
695	if (ev_is_active (w))	1112	if (ev_is_active (w))
696	return;	1113	return;
697		1114
698	w->at += now;	1115	w->at += mn_now;
699		1116
700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1117	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701		1118
702	ev_start ((W)w, ++timercnt);	1119	ev_start (EV_A_ (W)w, ++timercnt);
703	array_needsize (timers, timermax, timercnt, );	1120	array_needsize (timers, timermax, timercnt, );
704	timers [timercnt - 1] = w;	1121	timers [timercnt - 1] = w;
705	upheap ((WT *)timers, timercnt - 1);	1122	upheap ((WT *)timers, timercnt - 1);
706	}	1123	}
707		1124
708	void	1125	void
709	evtimer_stop (struct ev_timer *w)	1126	ev_timer_stop (EV_P_ struct ev_timer *w)
710	{	1127	{
711	ev_clear ((W)w);	1128	ev_clear_pending (EV_A_ (W)w);
712	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
713	return;	1130	return;
714		1131
715	if (w->active < timercnt--)	1132	if (w->active < timercnt--)
716	{	1133	{
…		…
718	downheap ((WT *)timers, timercnt, w->active - 1);	1135	downheap ((WT *)timers, timercnt, w->active - 1);
719	}	1136	}
720		1137
721	w->at = w->repeat;	1138	w->at = w->repeat;
722		1139
723	ev_stop ((W)w);	1140	ev_stop (EV_A_ (W)w);
724	}	1141	}
725		1142
726	void	1143	void
727	evtimer_again (struct ev_timer *w)	1144	ev_timer_again (EV_P_ struct ev_timer *w)
728	{	1145	{
729	if (ev_is_active (w))	1146	if (ev_is_active (w))
730	{	1147	{
731	if (w->repeat)	1148	if (w->repeat)
732	{	1149	{
733	w->at = now + w->repeat;	1150	w->at = mn_now + w->repeat;
734	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, w->active - 1);
735	}	1152	}
736	else	1153	else
737	evtimer_stop (w);	1154	ev_timer_stop (EV_A_ w);
738	}	1155	}
739	else if (w->repeat)	1156	else if (w->repeat)
740	evtimer_start (w);	1157	ev_timer_start (EV_A_ w);
741	}	1158	}
742		1159
743	void	1160	void
744	evperiodic_start (struct ev_periodic *w)	1161	ev_periodic_start (EV_P_ struct ev_periodic *w)
745	{	1162	{
746	if (ev_is_active (w))	1163	if (ev_is_active (w))
747	return;	1164	return;
748		1165
749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1166	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
750		1167
751	/* this formula differs from the one in periodic_reify because we do not always round up */	1168	/* this formula differs from the one in periodic_reify because we do not always round up */
752	if (w->interval)	1169	if (w->interval)
753	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1170	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
754		1171
755	ev_start ((W)w, ++periodiccnt);	1172	ev_start (EV_A_ (W)w, ++periodiccnt);
756	array_needsize (periodics, periodicmax, periodiccnt, );	1173	array_needsize (periodics, periodicmax, periodiccnt, );
757	periodics [periodiccnt - 1] = w;	1174	periodics [periodiccnt - 1] = w;
758	upheap ((WT *)periodics, periodiccnt - 1);	1175	upheap ((WT *)periodics, periodiccnt - 1);
759	}	1176	}
760		1177
761	void	1178	void
762	evperiodic_stop (struct ev_periodic *w)	1179	ev_periodic_stop (EV_P_ struct ev_periodic *w)
763	{	1180	{
764	ev_clear ((W)w);	1181	ev_clear_pending (EV_A_ (W)w);
765	if (!ev_is_active (w))	1182	if (!ev_is_active (w))
766	return;	1183	return;
767		1184
768	if (w->active < periodiccnt--)	1185	if (w->active < periodiccnt--)
769	{	1186	{
770	periodics [w->active - 1] = periodics [periodiccnt];	1187	periodics [w->active - 1] = periodics [periodiccnt];
771	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1188	downheap ((WT *)periodics, periodiccnt, w->active - 1);
772	}	1189	}
773		1190
774	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
775	}	1192	}
776		1193
777	void	1194	void
778	evsignal_start (struct ev_signal *w)	1195	ev_idle_start (EV_P_ struct ev_idle *w)
779	{	1196	{
780	if (ev_is_active (w))	1197	if (ev_is_active (w))
781	return;	1198	return;
782		1199
		1200	ev_start (EV_A_ (W)w, ++idlecnt);
		1201	array_needsize (idles, idlemax, idlecnt, );
		1202	idles [idlecnt - 1] = w;
		1203	}
		1204
		1205	void
		1206	ev_idle_stop (EV_P_ struct ev_idle *w)
		1207	{
		1208	ev_clear_pending (EV_A_ (W)w);
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	idles [w->active - 1] = idles [--idlecnt];
		1213	ev_stop (EV_A_ (W)w);
		1214	}
		1215
		1216	void
		1217	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1218	{
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	ev_start (EV_A_ (W)w, ++preparecnt);
		1223	array_needsize (prepares, preparemax, preparecnt, );
		1224	prepares [preparecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	prepares [w->active - 1] = prepares [--preparecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_check_start (EV_P_ struct ev_check *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++checkcnt);
		1245	array_needsize (checks, checkmax, checkcnt, );
		1246	checks [checkcnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_check_stop (EV_P_ struct ev_check *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	checks [w->active - 1] = checks [--checkcnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	#ifndef SA_RESTART
		1261	# define SA_RESTART 0
		1262	#endif
		1263
		1264	void
		1265	ev_signal_start (EV_P_ struct ev_signal *w)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1269	#endif
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1274
783	ev_start ((W)w, 1);	1275	ev_start (EV_A_ (W)w, 1);
784	array_needsize (signals, signalmax, w->signum, signals_init);	1276	array_needsize (signals, signalmax, w->signum, signals_init);
785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1277	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786		1278
787	if (!w->next)	1279	if (!w->next)
788	{	1280	{
789	struct sigaction sa;	1281	struct sigaction sa;
790	sa.sa_handler = sighandler;	1282	sa.sa_handler = sighandler;
791	sigfillset (&sa.sa_mask);	1283	sigfillset (&sa.sa_mask);
792	sa.sa_flags = 0;	1284	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793	sigaction (w->signum, &sa, 0);	1285	sigaction (w->signum, &sa, 0);
794	}	1286	}
795	}	1287	}
796		1288
797	void	1289	void
798	evsignal_stop (struct ev_signal *w)	1290	ev_signal_stop (EV_P_ struct ev_signal *w)
799	{	1291	{
800	ev_clear ((W)w);	1292	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1293	if (!ev_is_active (w))
802	return;	1294	return;
803		1295
804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1296	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805	ev_stop ((W)w);	1297	ev_stop (EV_A_ (W)w);
806		1298
807	if (!signals [w->signum - 1].head)	1299	if (!signals [w->signum - 1].head)
808	signal (w->signum, SIG_DFL);	1300	signal (w->signum, SIG_DFL);
809	}	1301	}
810		1302
811	void evidle_start (struct ev_idle *w)	1303	void
		1304	ev_child_start (EV_P_ struct ev_child *w)
812	{	1305	{
		1306	#if EV_MULTIPLICITY
		1307	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1308	#endif
813	if (ev_is_active (w))	1309	if (ev_is_active (w))
814	return;	1310	return;
815		1311
816	ev_start ((W)w, ++idlecnt);	1312	ev_start (EV_A_ (W)w, 1);
817	array_needsize (idles, idlemax, idlecnt, );	1313	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
818	idles [idlecnt - 1] = w;
819	}	1314	}
820		1315
821	void evidle_stop (struct ev_idle *w)	1316	void
		1317	ev_child_stop (EV_P_ struct ev_child *w)
822	{	1318	{
823	ev_clear ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
824	if (ev_is_active (w))	1320	if (ev_is_active (w))
825	return;	1321	return;
826		1322
827	idles [w->active - 1] = idles [--idlecnt];	1323	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
828	ev_stop ((W)w);	1324	ev_stop (EV_A_ (W)w);
829	}
830
831	void evcheck_start (struct ev_check *w)
832	{
833	if (ev_is_active (w))
834	return;
835
836	ev_start ((W)w, ++checkcnt);
837	array_needsize (checks, checkmax, checkcnt, );
838	checks [checkcnt - 1] = w;
839	}
840
841	void evcheck_stop (struct ev_check *w)
842	{
843	ev_clear ((W)w);
844	if (ev_is_active (w))
845	return;
846
847	checks [w->active - 1] = checks [--checkcnt];
848	ev_stop ((W)w);
849	}	1325	}
850		1326
851	/*****************************************************************************/	1327	/*****************************************************************************/
852		1328
853	struct ev_once	1329	struct ev_once
…		…
857	void (cb)(int revents, void arg);	1333	void (cb)(int revents, void arg);
858	void *arg;	1334	void *arg;
859	};	1335	};
860		1336
861	static void	1337	static void
862	once_cb (struct ev_once *once, int revents)	1338	once_cb (EV_P_ struct ev_once *once, int revents)
863	{	1339	{
864	void (cb)(int revents, void arg) = once->cb;	1340	void (cb)(int revents, void arg) = once->cb;
865	void *arg = once->arg;	1341	void *arg = once->arg;
866		1342
867	evio_stop (&once->io);	1343	ev_io_stop (EV_A_ &once->io);
868	evtimer_stop (&once->to);	1344	ev_timer_stop (EV_A_ &once->to);
869	free (once);	1345	free (once);
870		1346
871	cb (revents, arg);	1347	cb (revents, arg);
872	}	1348	}
873		1349
874	static void	1350	static void
875	once_cb_io (struct ev_io *w, int revents)	1351	once_cb_io (EV_P_ struct ev_io *w, int revents)
876	{	1352	{
877	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1353	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
878	}	1354	}
879		1355
880	static void	1356	static void
881	once_cb_to (struct ev_timer *w, int revents)	1357	once_cb_to (EV_P_ struct ev_timer *w, int revents)
882	{	1358	{
883	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1359	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
884	}	1360	}
885		1361
886	void	1362	void
887	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1363	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
888	{	1364	{
889	struct ev_once *once = malloc (sizeof (struct ev_once));	1365	struct ev_once *once = malloc (sizeof (struct ev_once));
890		1366
891	if (!once)	1367	if (!once)
892	cb (EV_ERROR, arg);	1368	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
893	else	1369	else
894	{	1370	{
895	once->cb = cb;	1371	once->cb = cb;
896	once->arg = arg;	1372	once->arg = arg;
897		1373
898	evw_init (&once->io, once_cb_io);	1374	ev_watcher_init (&once->io, once_cb_io);
899
900	if (fd >= 0)	1375	if (fd >= 0)
901	{	1376	{
902	evio_set (&once->io, fd, events);	1377	ev_io_set (&once->io, fd, events);
903	evio_start (&once->io);	1378	ev_io_start (EV_A_ &once->io);
904	}	1379	}
905		1380
906	evw_init (&once->to, once_cb_to);	1381	ev_watcher_init (&once->to, once_cb_to);
907
908	if (timeout >= 0.)	1382	if (timeout >= 0.)
909	{	1383	{
910	evtimer_set (&once->to, timeout, 0.);	1384	ev_timer_set (&once->to, timeout, 0.);
911	evtimer_start (&once->to);	1385	ev_timer_start (EV_A_ &once->to);
912	}	1386	}
913	}	1387	}
914	}	1388	}
915		1389
916	/*****************************************************************************/
917
918	#if 0
919
920	struct ev_io wio;
921
922	static void
923	sin_cb (struct ev_io *w, int revents)
924	{
925	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
926	}
927
928	static void
929	ocb (struct ev_timer *w, int revents)
930	{
931	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
932	evtimer_stop (w);
933	evtimer_start (w);
934	}
935
936	static void
937	scb (struct ev_signal *w, int revents)
938	{
939	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
940	evio_stop (&wio);
941	evio_start (&wio);
942	}
943
944	static void
945	gcb (struct ev_signal *w, int revents)
946	{
947	fprintf (stderr, "generic %x\n", revents);
948
949	}
950
951	int main (void)
952	{
953	ev_init (0);
954
955	evio_init (&wio, sin_cb, 0, EV_READ);
956	evio_start (&wio);
957
958	struct ev_timer t[10000];
959
960	#if 0
961	int i;
962	for (i = 0; i < 10000; ++i)
963	{
964	struct ev_timer *w = t + i;
965	evw_init (w, ocb, i);
966	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
967	evtimer_start (w);
968	if (drand48 () < 0.5)
969	evtimer_stop (w);
970	}
971	#endif
972
973	struct ev_timer t1;
974	evtimer_init (&t1, ocb, 5, 10);
975	evtimer_start (&t1);
976
977	struct ev_signal sig;
978	evsignal_init (&sig, scb, SIGQUIT);
979	evsignal_start (&sig);
980
981	struct ev_check cw;
982	evcheck_init (&cw, gcb);
983	evcheck_start (&cw);
984
985	struct ev_idle iw;
986	evidle_init (&iw, gcb);
987	evidle_start (&iw);
988
989	ev_loop (0);
990
991	return 0;
992	}
993
994	#endif
995
996
997
998

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Comparing libev/ev.c (file contents): Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs. Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC