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

Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
41	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
42	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
43	#include <sys/time.h>	50	#include <sys/time.h>
44	#include <time.h>	51	#include <time.h>
45		52
		53	/**/
		54
46	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
47	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
49	# endif	84	#endif
50	#endif
51		85
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	86	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
62	#endif	89	#endif
		90
		91	/**/
63		92
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		97
68	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		113
70	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
73		117
74	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77
78	static int have_monotonic; /* runtime */
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		119
84	/*****************************************************************************/	120	/*****************************************************************************/
85		121
86	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#ifdef EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
87	ev_time (void)	156	ev_time (void)
88	{	157	{
89	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
90	struct timespec ts;	159	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	162	#else
94	struct timeval tv;	163	struct timeval tv;
95	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	166	#endif
98	}	167	}
99		168
100	static ev_tstamp	169	inline ev_tstamp
101	get_clock (void)	170	get_clock (void)
102	{	171	{
103	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
104	if (have_monotonic)	173	if (expect_true (have_monotonic))
105	{	174	{
106	struct timespec ts;	175	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	178	}
110	#endif	179	#endif
111		180
112	return ev_time ();	181	return ev_time ();
113	}	182	}
114		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		191
115	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
117	{ \	194	{ \
118	int newcnt = cur; \	195	int newcnt = cur; \
119	do \	196	do \
120	{ \	197	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	198	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	199	} \
123	while ((cnt) > newcnt); \	200	while ((cnt) > newcnt); \
124	\	201	\
125	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	204	cur = newcnt; \
128	}	205	}
129		206
130	/*****************************************************************************/	207	/*****************************************************************************/
131		208
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	209	static void
145	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
146	{	211	{
147	while (count--)	212	while (count--)
148	{	213	{
149	base->head = 0;	214	base->head = 0;
150	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
151	++base;	218	++base;
152	}	219	}
153	}	220	}
154		221
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	222	static void
165	event (W w, int events)	223	event (EV_P_ W w, int events)
166	{	224	{
167	if (w->active)	225	if (w->pending)
168	{	226	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
173	}	229	}
174	}
175		230
		231	w->pending = ++pendingcnt [ABSPRI (w)];
		232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		233	pendings [ABSPRI (w)][w->pending - 1].w = w;
		234	pendings [ABSPRI (w)][w->pending - 1].events = events;
		235	}
		236
176	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
177	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
178	{	248	{
179	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	250	struct ev_io *w;
181		251
182	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
183	{	253	{
184	int ev = w->events & events;	254	int ev = w->events & events;
185		255
186	if (ev)	256	if (ev)
187	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
188	}	258	}
189	}	259	}
190		260
		261	/*****************************************************************************/
		262
191	static void	263	static void
192	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
193	{	265	{
194	int i;	266	int i;
195		267
196	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		277	events \|= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify \|\| fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
198	}	314	}
199		315
200	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
201	static void	317	static void
202	fd_recheck ()	318	fd_ebadf (EV_P)
203	{	319	{
204	int fd;	320	int fd;
205		321
206	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	323	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
210	evio_stop (anfds [fd].head);	326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
		340	}
211	}	341	}
212		342
213	/*****************************************************************************/	343	/*****************************************************************************/
214		344
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void	345	static void
222	upheap (WT *timers, int k)	346	upheap (WT *heap, int k)
223	{	347	{
224	WT w = timers [k];	348	WT w = heap [k];
225		349
226	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
227	{	351	{
228	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
229	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
230	k >>= 1;	354	k >>= 1;
231	}	355	}
232		356
233	timers [k] = w;	357	heap [k] = w;
234	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
235		359
236	}	360	}
237		361
238	static void	362	static void
239	downheap (WT *timers, int N, int k)	363	downheap (WT *heap, int N, int k)
240	{	364	{
241	WT w = timers [k];	365	WT w = heap [k];
242		366
243	while (k < (N >> 1))	367	while (k < (N >> 1))
244	{	368	{
245	int j = k << 1;	369	int j = k << 1;
246		370
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
248	++j;	372	++j;
249		373
250	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
251	break;	375	break;
252		376
253	timers [k] = timers [j];	377	heap [k] = heap [j];
254	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
255	k = j;	379	k = j;
256	}	380	}
257		381
258	timers [k] = w;	382	heap [k] = w;
259	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
260	}	384	}
261		385
262	/*****************************************************************************/	386	/*****************************************************************************/
263		387
264	typedef struct	388	typedef struct
265	{	389	{
266	struct ev_signal *head;	390	struct ev_watcher_list *head;
267	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
268	} ANSIG;	392	} ANSIG;
269		393
270	static ANSIG *signals;	394	static ANSIG *signals;
271	static int signalmax;	395	static int signalmax;
272		396
273	static int sigpipe [2];	397	static int sigpipe [2];
274	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;
276		399
277	static void	400	static void
278	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
279	{	402	{
280	while (count--)	403	while (count--)
281	{	404	{
282	base->head = 0;	405	base->head = 0;
283	base->gotsig = 0;	406	base->gotsig = 0;
		407
284	++base;	408	++base;
285	}	409	}
286	}	410	}
287		411
288	static void	412	static void
…		…
290	{	414	{
291	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
292		416
293	if (!gotsig)	417	if (!gotsig)
294	{	418	{
		419	int old_errno = errno;
295	gotsig = 1;	420	gotsig = 1;
296	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
297	}	423	}
298	}	424	}
299		425
300	static void	426	static void
301	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
302	{	428	{
303	struct ev_signal *w;	429	struct ev_watcher_list *w;
304	int sig;	430	int signum;
305		431
		432	read (sigpipe [0], &revents, 1);
306	gotsig = 0;	433	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		434
309	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
310	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
311	{	437	{
312	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
313		439
314	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
315	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
316	}	442	}
317	}	443	}
318		444
319	static void	445	static void
320	siginit (void)	446	siginit (EV_P)
321	{	447	{
		448	#ifndef WIN32
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324		451
325	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
328		456
329	evio_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
331	}	460	}
332		461
333	/*****************************************************************************/	462	/*****************************************************************************/
334		463
335	static struct ev_idle **idles;	464	#ifndef WIN32
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345
346	static struct ev_child *childs [PID_HASHSIZE];
347	static struct ev_signal childev;
348		465
349	#ifndef WCONTINUED	466	#ifndef WCONTINUED
350	# define WCONTINUED 0	467	# define WCONTINUED 0
351	#endif	468	#endif
352		469
353	static void	470	static void
354	childcb (struct ev_signal *sw, int revents)	471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
355	{	472	{
356	struct ev_child *w;	473	struct ev_child *w;
		474
		475	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		476	if (w->pid == pid \|\| !w->pid)
		477	{
		478	w->priority = sw->priority; /* need to do it now */
		479	w->rpid = pid;
		480	w->rstatus = status;
		481	event (EV_A_ (W)w, EV_CHILD);
		482	}
		483	}
		484
		485	static void
		486	childcb (EV_P_ struct ev_signal *sw, int revents)
		487	{
357	int pid, status;	488	int pid, status;
358		489
359	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	490	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	491	{
361	if (w->pid == pid \|\| w->pid == -1)	492	/* make sure we are called again until all childs have been reaped */
362	{	493	event (EV_A_ (W)sw, EV_SIGNAL);
363	w->status = status;	494
364	event ((W)w, EV_CHILD);	495	child_reap (EV_A_ sw, pid, pid, status);
365	}	496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
366	}	498	}
		499
		500	#endif
367		501
368	/*****************************************************************************/	502	/*****************************************************************************/
369		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
370	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	508	# include "ev_epoll.c"
372	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
373	#if HAVE_SELECT	513	#if EV_USE_SELECT
374	# include "ev_select.c"	514	# include "ev_select.c"
375	#endif	515	#endif
376		516
377	int ev_init (int flags)	517	int
		518	ev_version_major (void)
378	{	519	{
		520	return EV_VERSION_MAJOR;
		521	}
		522
		523	int
		524	ev_version_minor (void)
		525	{
		526	return EV_VERSION_MINOR;
		527	}
		528
		529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
		532	{
		533	#ifdef WIN32
		534	return 0;
		535	#else
		536	return getuid () != geteuid ()
		537	\|\| getgid () != getegid ();
		538	#endif
		539	}
		540
		541	int
		542	ev_method (EV_P)
		543	{
		544	return method;
		545	}
		546
		547	static void
		548	loop_init (EV_P_ int methods)
		549	{
379	if (!ev_method)	550	if (!method)
380	{	551	{
381	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
382	{	553	{
383	struct timespec ts;	554	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	556	have_monotonic = 1;
386	}	557	}
387	#endif	558	#endif
388		559
389	ev_now = ev_time ();	560	rt_now = ev_time ();
390	now = get_clock ();	561	mn_now = get_clock ();
		562	now_floor = mn_now;
391	diff = ev_now - now;	563	rtmn_diff = rt_now - mn_now;
392		564
393	if (pipe (sigpipe))	565	if (pipe (sigpipe))
394	return 0;	566	return 0;
395		567
		568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
396	ev_method = EVMETHOD_NONE;	572	methods = EVMETHOD_ANY;
		573
		574	method = 0;
		575	#if EV_USE_KQUEUE
		576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		577	#endif
397	#if HAVE_EPOLL	578	#if EV_USE_EPOLL
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
399	#endif	580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
400	#if HAVE_SELECT	584	#if EV_USE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
402	#endif	586	#endif
403		587
404	if (ev_method)	588	if (method)
405	{	589	{
406	evw_init (&sigev, sigcb);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
407	siginit ();	592	siginit (EV_A);
408		593
		594	#ifndef WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	597	ev_signal_start (EV_A_ &childev);
		598	ev_unref (EV_A); /* child watcher should not keep loop alive */
		599	#endif
411	}	600	}
412	}	601	}
413		602
414	return ev_method;	603	return method;
415	}	604	}
		605
		606	#ifdef EV_MULTIPLICITY
		607
		608	struct ev_loop *
		609	ev_loop_new (int methods)
		610	{
		611	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		612
		613	loop_init (EV_A_ methods);
		614
		615	return loop;
		616	}
		617
		618	void
		619	ev_loop_delete (EV_P)
		620	{
		621	/TODO/
		622	free (loop);
		623	}
		624
		625	#else
		626
		627	int
		628	ev_init (int methods)
		629	{
		630	loop_init ();
		631	}
		632
		633	#endif
416		634
417	/*****************************************************************************/	635	/*****************************************************************************/
418		636
419	void ev_prefork (void)	637	void
		638	ev_fork_prepare (void)
420	{	639	{
421	/* nop */	640	/* nop */
422	}	641	}
423		642
		643	void
424	void ev_postfork_parent (void)	644	ev_fork_parent (void)
425	{	645	{
426	/* nop */	646	/* nop */
427	}	647	}
428		648
		649	void
429	void ev_postfork_child (void)	650	ev_fork_child (void)
430	{	651	{
		652	/TODO/
		653	#if !EV_MULTIPLICITY
431	#if HAVE_EPOLL	654	#if EV_USE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)	655	if (method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();	656	epoll_postfork_child (EV_A);
434	#endif	657	#endif
435		658
436	evio_stop (&sigev);	659	ev_io_stop (EV_A_ &sigev);
437	close (sigpipe [0]);	660	close (sigpipe [0]);
438	close (sigpipe [1]);	661	close (sigpipe [1]);
439	pipe (sigpipe);	662	pipe (sigpipe);
440	siginit ();	663	siginit (EV_A);
		664	#endif
441	}	665	}
442		666
443	/*****************************************************************************/	667	/*****************************************************************************/
444		668
445	static void	669	static void
446	fd_reify (void)	670	call_pending (EV_P)
447	{	671	{
448	int i;	672	int pri;
449		673
450	for (i = 0; i < fdchangecnt; ++i)	674	for (pri = NUMPRI; pri--; )
451	{	675	while (pendingcnt [pri])
452	int fd = fdchanges [i];
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455
456	int wev = 0;
457
458	for (w = anfd->head; w; w = w->next)
459	wev \|= w->events;
460
461	if (anfd->wev != wev)
462	{	676	{
463	method_modify (fd, anfd->wev, wev);
464	anfd->wev = wev;
465	}
466	}
467
468	fdchangecnt = 0;
469	}
470
471	static void
472	call_pending ()
473	{
474	while (pendingcnt)
475	{
476	ANPENDING *p = pendings + --pendingcnt;	677	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
477		678
478	if (p->w)	679	if (p->w)
479	{	680	{
480	p->w->pending = 0;	681	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	682	p->w->cb (EV_A_ p->w, p->events);
482	}	683	}
483	}	684	}
484	}	685	}
485		686
486	static void	687	static void
487	timers_reify ()	688	timers_reify (EV_P)
488	{	689	{
489	while (timercnt && timers [0]->at <= now)	690	while (timercnt && timers [0]->at <= mn_now)
490	{	691	{
491	struct ev_timer *w = timers [0];	692	struct ev_timer *w = timers [0];
492
493	event ((W)w, EV_TIMEOUT);
494		693
495	/* first reschedule or stop timer */	694	/* first reschedule or stop timer */
496	if (w->repeat)	695	if (w->repeat)
497	{	696	{
		697	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
498	w->at = now + w->repeat;	698	w->at = mn_now + w->repeat;
499	assert (("timer timeout in the past, negative repeat?", w->at > now));
500	downheap ((WT *)timers, timercnt, 0);	699	downheap ((WT *)timers, timercnt, 0);
501	}	700	}
502	else	701	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	702	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		703
		704	event (EV_A_ (W)w, EV_TIMEOUT);
		705	}
		706	}
		707
507	static void	708	static void
508	periodics_reify ()	709	periodics_reify (EV_P)
509	{	710	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	711	while (periodiccnt && periodics [0]->at <= rt_now)
511	{	712	{
512	struct ev_periodic *w = periodics [0];	713	struct ev_periodic *w = periodics [0];
513		714
514	/* first reschedule or stop timer */	715	/* first reschedule or stop timer */
515	if (w->interval)	716	if (w->interval)
516	{	717	{
517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	718	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	719	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
519	downheap ((WT *)periodics, periodiccnt, 0);	720	downheap ((WT *)periodics, periodiccnt, 0);
520	}	721	}
521	else	722	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	723	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		724
524	event ((W)w, EV_TIMEOUT);	725	event (EV_A_ (W)w, EV_PERIODIC);
525	}	726	}
526	}	727	}
527		728
528	static void	729	static void
529	periodics_reschedule (ev_tstamp diff)	730	periodics_reschedule (EV_P)
530	{	731	{
531	int i;	732	int i;
532		733
533	/* adjust periodics after time jump */	734	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	735	for (i = 0; i < periodiccnt; ++i)
535	{	736	{
536	struct ev_periodic *w = periodics [i];	737	struct ev_periodic *w = periodics [i];
537		738
538	if (w->interval)	739	if (w->interval)
539	{	740	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	741	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
541		742
542	if (fabs (diff) >= 1e-4)	743	if (fabs (diff) >= 1e-4)
543	{	744	{
544	evperiodic_stop (w);	745	ev_periodic_stop (EV_A_ w);
545	evperiodic_start (w);	746	ev_periodic_start (EV_A_ w);
546		747
547	i = 0; /* restart loop, inefficient, but time jumps should be rare */	748	i = 0; /* restart loop, inefficient, but time jumps should be rare */
548	}	749	}
549	}	750	}
550	}	751	}
551	}	752	}
552		753
		754	inline int
		755	time_update_monotonic (EV_P)
		756	{
		757	mn_now = get_clock ();
		758
		759	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		760	{
		761	rt_now = rtmn_diff + mn_now;
		762	return 0;
		763	}
		764	else
		765	{
		766	now_floor = mn_now;
		767	rt_now = ev_time ();
		768	return 1;
		769	}
		770	}
		771
553	static void	772	static void
554	time_update ()	773	time_update (EV_P)
555	{	774	{
556	int i;	775	int i;
557		776
558	ev_now = ev_time ();	777	#if EV_USE_MONOTONIC
559
560	if (have_monotonic)	778	if (expect_true (have_monotonic))
561	{	779	{
562	ev_tstamp odiff = diff;	780	if (time_update_monotonic (EV_A))
563
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
565	{	781	{
566	now = get_clock ();	782	ev_tstamp odiff = rtmn_diff;
		783
		784	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		785	{
567	diff = ev_now - now;	786	rtmn_diff = rt_now - mn_now;
568		787
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)	788	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
570	return; /* all is well */	789	return; /* all is well */
571		790
572	ev_now = ev_time ();	791	rt_now = ev_time ();
		792	mn_now = get_clock ();
		793	now_floor = mn_now;
		794	}
		795
		796	periodics_reschedule (EV_A);
		797	/* no timer adjustment, as the monotonic clock doesn't jump */
		798	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
573	}	799	}
574
575	periodics_reschedule (diff - odiff);
576	/* no timer adjustment, as the monotonic clock doesn't jump */
577	}	800	}
578	else	801	else
		802	#endif
579	{	803	{
580	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	804	rt_now = ev_time ();
		805
		806	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
581	{	807	{
582	periodics_reschedule (ev_now - now);	808	periodics_reschedule (EV_A);
583		809
584	/* adjust timers. this is easy, as the offset is the same for all */	810	/* adjust timers. this is easy, as the offset is the same for all */
585	for (i = 0; i < timercnt; ++i)	811	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	812	timers [i]->at += rt_now - mn_now;
587	}	813	}
588		814
589	now = ev_now;	815	mn_now = rt_now;
590	}	816	}
591	}	817	}
592		818
593	int ev_loop_done;	819	void
		820	ev_ref (EV_P)
		821	{
		822	++activecnt;
		823	}
594		824
		825	void
		826	ev_unref (EV_P)
		827	{
		828	--activecnt;
		829	}
		830
		831	static int loop_done;
		832
		833	void
595	void ev_loop (int flags)	834	ev_loop (EV_P_ int flags)
596	{	835	{
597	double block;	836	double block;
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	837	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
599		838
600	do	839	do
601	{	840	{
602	/* queue check watchers (and execute them) */	841	/* queue check watchers (and execute them) */
603	if (preparecnt)	842	if (expect_false (preparecnt))
604	{	843	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	844	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	845	call_pending (EV_A);
607	}	846	}
608		847
609	/* update fd-related kernel structures */	848	/* update fd-related kernel structures */
610	fd_reify ();	849	fd_reify (EV_A);
611		850
612	/* calculate blocking time */	851	/* calculate blocking time */
613		852
614	/* we only need this for !monotonic clockor timers, but as we basically	853	/* we only need this for !monotonic clockor timers, but as we basically
615	always have timers, we just calculate it always */	854	always have timers, we just calculate it always */
		855	#if EV_USE_MONOTONIC
		856	if (expect_true (have_monotonic))
		857	time_update_monotonic (EV_A);
		858	else
		859	#endif
		860	{
616	ev_now = ev_time ();	861	rt_now = ev_time ();
		862	mn_now = rt_now;
		863	}
617		864
618	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	865	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
619	block = 0.;	866	block = 0.;
620	else	867	else
621	{	868	{
622	block = MAX_BLOCKTIME;	869	block = MAX_BLOCKTIME;
623		870
624	if (timercnt)	871	if (timercnt)
625	{	872	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	873	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
627	if (block > to) block = to;	874	if (block > to) block = to;
628	}	875	}
629		876
630	if (periodiccnt)	877	if (periodiccnt)
631	{	878	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	879	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
633	if (block > to) block = to;	880	if (block > to) block = to;
634	}	881	}
635		882
636	if (block < 0.) block = 0.;	883	if (block < 0.) block = 0.;
637	}	884	}
638		885
639	method_poll (block);	886	method_poll (EV_A_ block);
640		887
641	/* update ev_now, do magic */	888	/* update rt_now, do magic */
642	time_update ();	889	time_update (EV_A);
643		890
644	/* queue pending timers and reschedule them */	891	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	892	timers_reify (EV_A); /* relative timers called last */
646	periodics_reify (); /* absolute timers called first */	893	periodics_reify (EV_A); /* absolute timers called first */
647		894
648	/* queue idle watchers unless io or timers are pending */	895	/* queue idle watchers unless io or timers are pending */
649	if (!pendingcnt)	896	if (!pendingcnt)
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	897	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
651		898
652	/* queue check watchers, to be executed first */	899	/* queue check watchers, to be executed first */
653	if (checkcnt)	900	if (checkcnt)
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	901	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		902
656	call_pending ();	903	call_pending (EV_A);
657	}	904	}
658	while (!ev_loop_done);	905	while (activecnt && !loop_done);
659		906
660	if (ev_loop_done != 2)	907	if (loop_done != 2)
661	ev_loop_done = 0;	908	loop_done = 0;
		909	}
		910
		911	void
		912	ev_unloop (EV_P_ int how)
		913	{
		914	loop_done = how;
662	}	915	}
663		916
664	/*****************************************************************************/	917	/*****************************************************************************/
665		918
666	static void	919	inline void
667	wlist_add (WL *head, WL elem)	920	wlist_add (WL *head, WL elem)
668	{	921	{
669	elem->next = *head;	922	elem->next = *head;
670	*head = elem;	923	*head = elem;
671	}	924	}
672		925
673	static void	926	inline void
674	wlist_del (WL *head, WL elem)	927	wlist_del (WL *head, WL elem)
675	{	928	{
676	while (*head)	929	while (*head)
677	{	930	{
678	if (*head == elem)	931	if (*head == elem)
…		…
683		936
684	head = &(*head)->next;	937	head = &(*head)->next;
685	}	938	}
686	}	939	}
687		940
688	static void	941	inline void
689	ev_clear (W w)	942	ev_clear_pending (EV_P_ W w)
690	{	943	{
691	if (w->pending)	944	if (w->pending)
692	{	945	{
693	pendings [w->pending - 1].w = 0;	946	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	947	w->pending = 0;
695	}	948	}
696	}	949	}
697		950
698	static void	951	inline void
699	ev_start (W w, int active)	952	ev_start (EV_P_ W w, int active)
700	{	953	{
		954	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		955	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		956
701	w->active = active;	957	w->active = active;
		958	ev_ref (EV_A);
702	}	959	}
703		960
704	static void	961	inline void
705	ev_stop (W w)	962	ev_stop (EV_P_ W w)
706	{	963	{
		964	ev_unref (EV_A);
707	w->active = 0;	965	w->active = 0;
708	}	966	}
709		967
710	/*****************************************************************************/	968	/*****************************************************************************/
711		969
712	void	970	void
713	evio_start (struct ev_io *w)	971	ev_io_start (EV_P_ struct ev_io *w)
714	{	972	{
		973	int fd = w->fd;
		974
715	if (ev_is_active (w))	975	if (ev_is_active (w))
716	return;	976	return;
717		977
718	int fd = w->fd;	978	assert (("ev_io_start called with negative fd", fd >= 0));
719		979
720	ev_start ((W)w, 1);	980	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	981	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	982	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		983
724	++fdchangecnt;	984	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	985	}
728		986
729	void	987	void
730	evio_stop (struct ev_io *w)	988	ev_io_stop (EV_P_ struct ev_io *w)
731	{	989	{
732	ev_clear ((W)w);	990	ev_clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	991	if (!ev_is_active (w))
734	return;	992	return;
735		993
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	994	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	995	ev_stop (EV_A_ (W)w);
738		996
739	++fdchangecnt;	997	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	998	}
743		999
744	void	1000	void
745	evtimer_start (struct ev_timer *w)	1001	ev_timer_start (EV_P_ struct ev_timer *w)
746	{	1002	{
747	if (ev_is_active (w))	1003	if (ev_is_active (w))
748	return;	1004	return;
749		1005
750	w->at += now;	1006	w->at += mn_now;
751		1007
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1008	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1009
754	ev_start ((W)w, ++timercnt);	1010	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1011	array_needsize (timers, timermax, timercnt, );
756	timers [timercnt - 1] = w;	1012	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1013	upheap ((WT *)timers, timercnt - 1);
758	}	1014	}
759		1015
760	void	1016	void
761	evtimer_stop (struct ev_timer *w)	1017	ev_timer_stop (EV_P_ struct ev_timer *w)
762	{	1018	{
763	ev_clear ((W)w);	1019	ev_clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1020	if (!ev_is_active (w))
765	return;	1021	return;
766		1022
767	if (w->active < timercnt--)	1023	if (w->active < timercnt--)
768	{	1024	{
…		…
770	downheap ((WT *)timers, timercnt, w->active - 1);	1026	downheap ((WT *)timers, timercnt, w->active - 1);
771	}	1027	}
772		1028
773	w->at = w->repeat;	1029	w->at = w->repeat;
774		1030
775	ev_stop ((W)w);	1031	ev_stop (EV_A_ (W)w);
776	}	1032	}
777		1033
778	void	1034	void
779	evtimer_again (struct ev_timer *w)	1035	ev_timer_again (EV_P_ struct ev_timer *w)
780	{	1036	{
781	if (ev_is_active (w))	1037	if (ev_is_active (w))
782	{	1038	{
783	if (w->repeat)	1039	if (w->repeat)
784	{	1040	{
785	w->at = now + w->repeat;	1041	w->at = mn_now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1042	downheap ((WT *)timers, timercnt, w->active - 1);
787	}	1043	}
788	else	1044	else
789	evtimer_stop (w);	1045	ev_timer_stop (EV_A_ w);
790	}	1046	}
791	else if (w->repeat)	1047	else if (w->repeat)
792	evtimer_start (w);	1048	ev_timer_start (EV_A_ w);
793	}	1049	}
794		1050
795	void	1051	void
796	evperiodic_start (struct ev_periodic *w)	1052	ev_periodic_start (EV_P_ struct ev_periodic *w)
797	{	1053	{
798	if (ev_is_active (w))	1054	if (ev_is_active (w))
799	return;	1055	return;
800		1056
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1057	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
802		1058
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1059	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)	1060	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1061	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
806		1062
807	ev_start ((W)w, ++periodiccnt);	1063	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1064	array_needsize (periodics, periodicmax, periodiccnt, );
809	periodics [periodiccnt - 1] = w;	1065	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1066	upheap ((WT *)periodics, periodiccnt - 1);
811	}	1067	}
812		1068
813	void	1069	void
814	evperiodic_stop (struct ev_periodic *w)	1070	ev_periodic_stop (EV_P_ struct ev_periodic *w)
815	{	1071	{
816	ev_clear ((W)w);	1072	ev_clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1073	if (!ev_is_active (w))
818	return;	1074	return;
819		1075
820	if (w->active < periodiccnt--)	1076	if (w->active < periodiccnt--)
821	{	1077	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1078	periodics [w->active - 1] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1079	downheap ((WT *)periodics, periodiccnt, w->active - 1);
824	}	1080	}
825		1081
826	ev_stop ((W)w);	1082	ev_stop (EV_A_ (W)w);
827	}	1083	}
828		1084
		1085	#ifndef SA_RESTART
		1086	# define SA_RESTART 0
		1087	#endif
		1088
829	void	1089	void
830	evsignal_start (struct ev_signal *w)	1090	ev_signal_start (EV_P_ struct ev_signal *w)
831	{	1091	{
832	if (ev_is_active (w))	1092	if (ev_is_active (w))
833	return;	1093	return;
834		1094
		1095	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1096
835	ev_start ((W)w, 1);	1097	ev_start (EV_A_ (W)w, 1);
836	array_needsize (signals, signalmax, w->signum, signals_init);	1098	array_needsize (signals, signalmax, w->signum, signals_init);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1099	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1100
839	if (!w->next)	1101	if (!w->next)
840	{	1102	{
841	struct sigaction sa;	1103	struct sigaction sa;
842	sa.sa_handler = sighandler;	1104	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1105	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1106	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1107	sigaction (w->signum, &sa, 0);
846	}	1108	}
847	}	1109	}
848		1110
849	void	1111	void
850	evsignal_stop (struct ev_signal *w)	1112	ev_signal_stop (EV_P_ struct ev_signal *w)
851	{	1113	{
852	ev_clear ((W)w);	1114	ev_clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
854	return;	1116	return;
855		1117
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1118	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1119	ev_stop (EV_A_ (W)w);
858		1120
859	if (!signals [w->signum - 1].head)	1121	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1122	signal (w->signum, SIG_DFL);
861	}	1123	}
862		1124
		1125	void
863	void evidle_start (struct ev_idle *w)	1126	ev_idle_start (EV_P_ struct ev_idle *w)
864	{	1127	{
865	if (ev_is_active (w))	1128	if (ev_is_active (w))
866	return;	1129	return;
867		1130
868	ev_start ((W)w, ++idlecnt);	1131	ev_start (EV_A_ (W)w, ++idlecnt);
869	array_needsize (idles, idlemax, idlecnt, );	1132	array_needsize (idles, idlemax, idlecnt, );
870	idles [idlecnt - 1] = w;	1133	idles [idlecnt - 1] = w;
871	}	1134	}
872		1135
		1136	void
873	void evidle_stop (struct ev_idle *w)	1137	ev_idle_stop (EV_P_ struct ev_idle *w)
874	{	1138	{
875	ev_clear ((W)w);	1139	ev_clear_pending (EV_A_ (W)w);
876	if (ev_is_active (w))	1140	if (ev_is_active (w))
877	return;	1141	return;
878		1142
879	idles [w->active - 1] = idles [--idlecnt];	1143	idles [w->active - 1] = idles [--idlecnt];
880	ev_stop ((W)w);	1144	ev_stop (EV_A_ (W)w);
881	}	1145	}
882		1146
		1147	void
883	void evprepare_start (struct ev_prepare *w)	1148	ev_prepare_start (EV_P_ struct ev_prepare *w)
884	{	1149	{
885	if (ev_is_active (w))	1150	if (ev_is_active (w))
886	return;	1151	return;
887		1152
888	ev_start ((W)w, ++preparecnt);	1153	ev_start (EV_A_ (W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );	1154	array_needsize (prepares, preparemax, preparecnt, );
890	prepares [preparecnt - 1] = w;	1155	prepares [preparecnt - 1] = w;
891	}	1156	}
892		1157
		1158	void
893	void evprepare_stop (struct ev_prepare *w)	1159	ev_prepare_stop (EV_P_ struct ev_prepare *w)
894	{	1160	{
895	ev_clear ((W)w);	1161	ev_clear_pending (EV_A_ (W)w);
896	if (ev_is_active (w))	1162	if (ev_is_active (w))
897	return;	1163	return;
898		1164
899	prepares [w->active - 1] = prepares [--preparecnt];	1165	prepares [w->active - 1] = prepares [--preparecnt];
900	ev_stop ((W)w);	1166	ev_stop (EV_A_ (W)w);
901	}	1167	}
902		1168
		1169	void
903	void evcheck_start (struct ev_check *w)	1170	ev_check_start (EV_P_ struct ev_check *w)
904	{	1171	{
905	if (ev_is_active (w))	1172	if (ev_is_active (w))
906	return;	1173	return;
907		1174
908	ev_start ((W)w, ++checkcnt);	1175	ev_start (EV_A_ (W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );	1176	array_needsize (checks, checkmax, checkcnt, );
910	checks [checkcnt - 1] = w;	1177	checks [checkcnt - 1] = w;
911	}	1178	}
912		1179
		1180	void
913	void evcheck_stop (struct ev_check *w)	1181	ev_check_stop (EV_P_ struct ev_check *w)
914	{	1182	{
915	ev_clear ((W)w);	1183	ev_clear_pending (EV_A_ (W)w);
916	if (ev_is_active (w))	1184	if (ev_is_active (w))
917	return;	1185	return;
918		1186
919	checks [w->active - 1] = checks [--checkcnt];	1187	checks [w->active - 1] = checks [--checkcnt];
920	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
921	}	1189	}
922		1190
		1191	void
923	void evchild_start (struct ev_child *w)	1192	ev_child_start (EV_P_ struct ev_child *w)
924	{	1193	{
925	if (ev_is_active (w))	1194	if (ev_is_active (w))
926	return;	1195	return;
927		1196
928	ev_start ((W)w, 1);	1197	ev_start (EV_A_ (W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1198	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}	1199	}
931		1200
		1201	void
932	void evchild_stop (struct ev_child *w)	1202	ev_child_stop (EV_P_ struct ev_child *w)
933	{	1203	{
934	ev_clear ((W)w);	1204	ev_clear_pending (EV_A_ (W)w);
935	if (ev_is_active (w))	1205	if (ev_is_active (w))
936	return;	1206	return;
937		1207
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1208	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
939	ev_stop ((W)w);	1209	ev_stop (EV_A_ (W)w);
940	}	1210	}
941		1211
942	/*****************************************************************************/	1212	/*****************************************************************************/
943		1213
944	struct ev_once	1214	struct ev_once
…		…
948	void (cb)(int revents, void arg);	1218	void (cb)(int revents, void arg);
949	void *arg;	1219	void *arg;
950	};	1220	};
951		1221
952	static void	1222	static void
953	once_cb (struct ev_once *once, int revents)	1223	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	1224	{
955	void (cb)(int revents, void arg) = once->cb;	1225	void (cb)(int revents, void arg) = once->cb;
956	void *arg = once->arg;	1226	void *arg = once->arg;
957		1227
958	evio_stop (&once->io);	1228	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	1229	ev_timer_stop (EV_A_ &once->to);
960	free (once);	1230	free (once);
961		1231
962	cb (revents, arg);	1232	cb (revents, arg);
963	}	1233	}
964		1234
965	static void	1235	static void
966	once_cb_io (struct ev_io *w, int revents)	1236	once_cb_io (EV_P_ struct ev_io *w, int revents)
967	{	1237	{
968	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1238	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
969	}	1239	}
970		1240
971	static void	1241	static void
972	once_cb_to (struct ev_timer *w, int revents)	1242	once_cb_to (EV_P_ struct ev_timer *w, int revents)
973	{	1243	{
974	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1244	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
975	}	1245	}
976		1246
977	void	1247	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1248	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
979	{	1249	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	1250	struct ev_once *once = malloc (sizeof (struct ev_once));
981		1251
982	if (!once)	1252	if (!once)
983	cb (EV_ERROR, arg);	1253	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
984	else	1254	else
985	{	1255	{
986	once->cb = cb;	1256	once->cb = cb;
987	once->arg = arg;	1257	once->arg = arg;
988		1258
989	evw_init (&once->io, once_cb_io);	1259	ev_watcher_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	1260	if (fd >= 0)
992	{	1261	{
993	evio_set (&once->io, fd, events);	1262	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	1263	ev_io_start (EV_A_ &once->io);
995	}	1264	}
996		1265
997	evw_init (&once->to, once_cb_to);	1266	ev_watcher_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	1267	if (timeout >= 0.)
1000	{	1268	{
1001	evtimer_set (&once->to, timeout, 0.);	1269	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	1270	ev_timer_start (EV_A_ &once->to);
1003	}	1271	}
1004	}	1272	}
1005	}	1273	}
1006		1274
1007	/*****************************************************************************/	1275	/*****************************************************************************/
…		…
1018		1286
1019	static void	1287	static void
1020	ocb (struct ev_timer *w, int revents)	1288	ocb (struct ev_timer *w, int revents)
1021	{	1289	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1290	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);	1291	ev_timer_stop (w);
1024	evtimer_start (w);	1292	ev_timer_start (w);
1025	}	1293	}
1026		1294
1027	static void	1295	static void
1028	scb (struct ev_signal *w, int revents)	1296	scb (struct ev_signal *w, int revents)
1029	{	1297	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1298	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);	1299	ev_io_stop (&wio);
1032	evio_start (&wio);	1300	ev_io_start (&wio);
1033	}	1301	}
1034		1302
1035	static void	1303	static void
1036	gcb (struct ev_signal *w, int revents)	1304	gcb (struct ev_signal *w, int revents)
1037	{	1305	{
…		…
1041		1309
1042	int main (void)	1310	int main (void)
1043	{	1311	{
1044	ev_init (0);	1312	ev_init (0);
1045		1313
1046	evio_init (&wio, sin_cb, 0, EV_READ);	1314	ev_io_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);	1315	ev_io_start (&wio);
1048		1316
1049	struct ev_timer t[10000];	1317	struct ev_timer t[10000];
1050		1318
1051	#if 0	1319	#if 0
1052	int i;	1320	int i;
1053	for (i = 0; i < 10000; ++i)	1321	for (i = 0; i < 10000; ++i)
1054	{	1322	{
1055	struct ev_timer *w = t + i;	1323	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);	1324	ev_watcher_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);	1325	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);	1326	ev_timer_start (w);
1059	if (drand48 () < 0.5)	1327	if (drand48 () < 0.5)
1060	evtimer_stop (w);	1328	ev_timer_stop (w);
1061	}	1329	}
1062	#endif	1330	#endif
1063		1331
1064	struct ev_timer t1;	1332	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);	1333	ev_timer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);	1334	ev_timer_start (&t1);
1067		1335
1068	struct ev_signal sig;	1336	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);	1337	ev_signal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);	1338	ev_signal_start (&sig);
1071		1339
1072	struct ev_check cw;	1340	struct ev_check cw;
1073	evcheck_init (&cw, gcb);	1341	ev_check_init (&cw, gcb);
1074	evcheck_start (&cw);	1342	ev_check_start (&cw);
1075		1343
1076	struct ev_idle iw;	1344	struct ev_idle iw;
1077	evidle_init (&iw, gcb);	1345	ev_idle_init (&iw, gcb);
1078	evidle_start (&iw);	1346	ev_idle_start (&iw);
1079		1347
1080	ev_loop (0);	1348	ev_loop (0);
1081		1349
1082	return 0;	1350	return 0;
1083	}	1351	}

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Comparing libev/ev.c (file contents): Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs. Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC