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

Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 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	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	32	# include "config.h"
31	#endif	33	#endif
32		34
33	#include <math.h>	35	#include <math.h>
34	#include <stdlib.h>	36	#include <stdlib.h>
…		…
40	#include <stdio.h>	42	#include <stdio.h>
41		43
42	#include <assert.h>	44	#include <assert.h>
43	#include <errno.h>	45	#include <errno.h>
44	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
45	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
46	#include <sys/time.h>	50	#include <sys/time.h>
47	#include <time.h>	51	#include <time.h>
48		52
		53	/**/
		54
49	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	57	#endif
54		58
55	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
57	#endif	61	#endif
58		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
59	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
61	#endif	69	#endif
62		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
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
63	#ifndef CLOCK_REALTIME	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	88	# define EV_USE_REALTIME 0
65	#endif	89	#endif
66	#ifndef EV_USE_REALTIME	90
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	91	/**/
68	#endif
69		92
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
74		97
75	#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)
76		113
77	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
80		117
81	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84
85	static int have_monotonic; /* runtime */
86
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		119
91	/*****************************************************************************/	120	/*****************************************************************************/
92		121
93	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
94	ev_time (void)	156	ev_time (void)
95	{	157	{
96	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
97	struct timespec ts;	159	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	166	#endif
105	}	167	}
106		168
107	static ev_tstamp	169	inline ev_tstamp
108	get_clock (void)	170	get_clock (void)
109	{	171	{
110	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
111	if (have_monotonic)	173	if (expect_true (have_monotonic))
112	{	174	{
113	struct timespec ts;	175	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	178	}
117	#endif	179	#endif
118		180
119	return ev_time ();	181	return ev_time ();
120	}	182	}
121		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
123		191
124	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
126	{ \	194	{ \
127	int newcnt = cur; \	195	int newcnt = cur; \
128	do \	196	do \
129	{ \	197	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	204	cur = newcnt; \
137	}	205	}
138		206
139	/*****************************************************************************/	207	/*****************************************************************************/
140		208
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149
150	static void	209	static void
151	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
152	{	211	{
153	while (count--)	212	while (count--)
154	{	213	{
155	base->head = 0;	214	base->head = 0;
156	base->events = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
157	++base;	218	++base;
158	}	219	}
159	}	220	}
160		221
161	typedef struct
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void	222	static void
171	event (W w, int events)	223	event (EV_P_ W w, int events)
172	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
		229	}
		230
173	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
174	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
175	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
176	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
177	}	235	}
178		236
179	static void	237	static void
180	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	239	{
182	int i;	240	int i;
183		241
184	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	243	event (EV_A_ events [i], type);
186	}	244	}
187		245
188	static void	246	static void
189	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
190	{	248	{
191	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	250	struct ev_io *w;
193		251
194	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
195	{	253	{
196	int ev = w->events & events;	254	int ev = w->events & events;
197		255
198	if (ev)	256	if (ev)
199	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
200	}	258	}
201	}	259	}
202		260
203	/*****************************************************************************/	261	/*****************************************************************************/
204		262
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	263	static void
209	fd_reify (void)	264	fd_reify (EV_P)
210	{	265	{
211	int i;	266	int i;
212		267
213	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
214	{	269	{
…		…
216	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	272	struct ev_io *w;
218		273
219	int events = 0;	274	int events = 0;
220		275
221	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
222	events \|= w->events;	277	events \|= w->events;
223		278
224	anfd->events &= ~EV_REIFY;	279	anfd->reify = 0;
225		280
226	if (anfd->events != events)	281	if (anfd->events != events)
227	{	282	{
228	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	284	anfd->events = events;
230	}	285	}
231	}	286	}
232		287
233	fdchangecnt = 0;	288	fdchangecnt = 0;
234	}	289	}
235		290
236	static void	291	static void
237	fd_change (int fd)	292	fd_change (EV_P_ int fd)
238	{	293	{
239	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	294	if (anfds [fd].reify \|\| fdchangecnt < 0)
240	return;	295	return;
241		296
242	anfds [fd].events \|= EV_REIFY;	297	anfds [fd].reify = 1;
243		298
244	++fdchangecnt;	299	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
246	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
247	}	302	}
248		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	}
		314	}
		315
249	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
250	static void	317	static void
251	fd_recheck (void)	318	fd_ebadf (EV_P)
252	{	319	{
253	int fd;	320	int fd;
254		321
255	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	323	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
258	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
		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)
259	{	336	{
260	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	337	close (fd);
261	ev_io_stop (anfds [fd].head);	338	fd_kill (EV_A_ fd);
		339	return;
262	}	340	}
263	}	341	}
264		342
265	/*****************************************************************************/	343	/*****************************************************************************/
266		344
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	345	static void
274	upheap (WT *timers, int k)	346	upheap (WT *heap, int k)
275	{	347	{
276	WT w = timers [k];	348	WT w = heap [k];
277		349
278	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
279	{	351	{
280	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
282	k >>= 1;	354	k >>= 1;
283	}	355	}
284		356
285	timers [k] = w;	357	heap [k] = w;
286	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
287		359
288	}	360	}
289		361
290	static void	362	static void
291	downheap (WT *timers, int N, int k)	363	downheap (WT *heap, int N, int k)
292	{	364	{
293	WT w = timers [k];	365	WT w = heap [k];
294		366
295	while (k < (N >> 1))	367	while (k < (N >> 1))
296	{	368	{
297	int j = k << 1;	369	int j = k << 1;
298		370
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	372	++j;
301		373
302	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
303	break;	375	break;
304		376
305	timers [k] = timers [j];	377	heap [k] = heap [j];
306	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
307	k = j;	379	k = j;
308	}	380	}
309		381
310	timers [k] = w;	382	heap [k] = w;
311	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
312	}	384	}
313		385
314	/*****************************************************************************/	386	/*****************************************************************************/
315		387
316	typedef struct	388	typedef struct
317	{	389	{
318	struct ev_signal *head;	390	struct ev_watcher_list *head;
319	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
320	} ANSIG;	392	} ANSIG;
321		393
322	static ANSIG *signals;	394	static ANSIG *signals;
323	static int signalmax;	395	static int signalmax;
324		396
325	static int sigpipe [2];	397	static int sigpipe [2];
326	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;
328		399
329	static void	400	static void
330	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
331	{	402	{
332	while (count--)	403	while (count--)
333	{	404	{
334	base->head = 0;	405	base->head = 0;
335	base->gotsig = 0;	406	base->gotsig = 0;
		407
336	++base;	408	++base;
337	}	409	}
338	}	410	}
339		411
340	static void	412	static void
…		…
342	{	414	{
343	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
344		416
345	if (!gotsig)	417	if (!gotsig)
346	{	418	{
		419	int old_errno = errno;
347	gotsig = 1;	420	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
349	}	423	}
350	}	424	}
351		425
352	static void	426	static void
353	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	428	{
355	struct ev_signal *w;	429	struct ev_watcher_list *w;
356	int sig;	430	int signum;
357		431
		432	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	433	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		434
361	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
363	{	437	{
364	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
365		439
366	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
368	}	442	}
369	}	443	}
370		444
371	static void	445	static void
372	siginit (void)	446	siginit (EV_P)
373	{	447	{
		448	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		451
377	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
380		456
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	460	}
384		461
385	/*****************************************************************************/	462	/*****************************************************************************/
386		463
387	static struct ev_idle **idles;	464	#ifndef WIN32
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;
400		465
401	#ifndef WCONTINUED	466	#ifndef WCONTINUED
402	# define WCONTINUED 0	467	# define WCONTINUED 0
403	#endif	468	#endif
404		469
405	static void	470	static void
406	childcb (struct ev_signal *sw, int revents)	471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	472	{
408	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	{
409	int pid, status;	488	int pid, status;
410		489
411	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	490	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	491	{
413	if (w->pid == pid \|\| w->pid == -1)	492	/* make sure we are called again until all childs have been reaped */
414	{	493	event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	494
416	event ((W)w, EV_CHILD);	495	child_reap (EV_A_ sw, pid, pid, status);
417	}	496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
418	}	498	}
		499
		500	#endif
419		501
420	/*****************************************************************************/	502	/*****************************************************************************/
421		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
422	#if EV_USE_EPOLL	507	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	508	# include "ev_epoll.c"
424	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
425	#if EV_USE_SELECT	513	#if EV_USE_SELECT
426	# include "ev_select.c"	514	# include "ev_select.c"
427	#endif	515	#endif
428		516
429	int	517	int
…		…
436	ev_version_minor (void)	524	ev_version_minor (void)
437	{	525	{
438	return EV_VERSION_MINOR;	526	return EV_VERSION_MINOR;
439	}	527	}
440		528
441	int ev_init (int flags)	529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
442	{	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	inline int
		548	loop_init (EV_P_ int methods)
		549	{
443	if (!ev_method)	550	if (!method)
444	{	551	{
445	#if EV_USE_MONOTONIC	552	#if EV_USE_MONOTONIC
446	{	553	{
447	struct timespec ts;	554	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	556	have_monotonic = 1;
450	}	557	}
451	#endif	558	#endif
452		559
453	ev_now = ev_time ();	560	rt_now = ev_time ();
454	now = get_clock ();	561	mn_now = get_clock ();
		562	now_floor = mn_now;
455	diff = ev_now - now;	563	rtmn_diff = rt_now - mn_now;
456		564
457	if (pipe (sigpipe))	565	if (pipe (sigpipe))
458	return 0;	566	return 0;
459		567
		568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
460	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
461	#if EV_USE_EPOLL	578	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
463	#endif	583	#endif
464	#if EV_USE_SELECT	584	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	586	#endif
467		587
468	if (ev_method)	588	if (method)
469	{	589	{
470	ev_watcher_init (&sigev, sigcb);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
471	siginit ();	592	siginit (EV_A);
472		593
		594	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	597	ev_signal_start (EV_A_ &childev);
		598	ev_unref (EV_A); /* child watcher should not keep loop alive */
		599	#endif
475	}	600	}
476	}	601	}
477		602
478	return ev_method;	603	return method;
479	}	604	}
		605
		606	#if 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	if (loop_init (EV_A_ methods))
		614	return loop;
		615
		616	ev_loop_delete (loop);
		617
		618	return 0;
		619	}
		620
		621	void
		622	ev_loop_delete (EV_P)
		623	{
		624	/TODO/
		625	free (loop);
		626	}
		627
		628	#else
		629
		630	int
		631	ev_init (int methods)
		632	{
		633	return loop_init (methods);
		634	}
		635
		636	#endif
480		637
481	/*****************************************************************************/	638	/*****************************************************************************/
482		639
483	void	640	void
484	ev_prefork (void)	641	ev_fork_prepare (void)
485	{	642	{
486	/* nop */	643	/* nop */
487	}	644	}
488		645
489	void	646	void
490	ev_postfork_parent (void)	647	ev_fork_parent (void)
491	{	648	{
492	/* nop */	649	/* nop */
493	}	650	}
494		651
495	void	652	void
496	ev_postfork_child (void)	653	ev_fork_child (void)
497	{	654	{
		655	/TODO/
		656	#if !EV_MULTIPLICITY
498	#if EV_USE_EPOLL	657	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)	658	if (method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();	659	epoll_postfork_child (EV_A);
501	#endif	660	#endif
502		661
503	ev_io_stop (&sigev);	662	ev_io_stop (EV_A_ &sigev);
504	close (sigpipe [0]);	663	close (sigpipe [0]);
505	close (sigpipe [1]);	664	close (sigpipe [1]);
506	pipe (sigpipe);	665	pipe (sigpipe);
507	siginit ();	666	siginit (EV_A);
		667	#endif
508	}	668	}
509		669
510	/*****************************************************************************/	670	/*****************************************************************************/
511		671
512	static void	672	static void
513	call_pending (void)	673	call_pending (EV_P)
514	{	674	{
		675	int pri;
		676
		677	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	678	while (pendingcnt [pri])
516	{	679	{
517	ANPENDING *p = pendings + --pendingcnt;	680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		681
519	if (p->w)	682	if (p->w)
520	{	683	{
521	p->w->pending = 0;	684	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	685	p->w->cb (EV_A_ p->w, p->events);
523	}	686	}
524	}	687	}
525	}	688	}
526		689
527	static void	690	static void
528	timers_reify (void)	691	timers_reify (EV_P)
529	{	692	{
530	while (timercnt && timers [0]->at <= now)	693	while (timercnt && timers [0]->at <= mn_now)
531	{	694	{
532	struct ev_timer *w = timers [0];	695	struct ev_timer *w = timers [0];
533		696
534	/* first reschedule or stop timer */	697	/* first reschedule or stop timer */
535	if (w->repeat)	698	if (w->repeat)
536	{	699	{
		700	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
537	w->at = now + w->repeat;	701	w->at = mn_now + w->repeat;
538	assert (("timer timeout in the past, negative repeat?", w->at > now));
539	downheap ((WT *)timers, timercnt, 0);	702	downheap ((WT *)timers, timercnt, 0);
540	}	703	}
541	else	704	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	705	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		706
544	event ((W)w, EV_TIMEOUT);	707	event (EV_A_ (W)w, EV_TIMEOUT);
545	}	708	}
546	}	709	}
547		710
548	static void	711	static void
549	periodics_reify (void)	712	periodics_reify (EV_P)
550	{	713	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	714	while (periodiccnt && periodics [0]->at <= rt_now)
552	{	715	{
553	struct ev_periodic *w = periodics [0];	716	struct ev_periodic *w = periodics [0];
554		717
555	/* first reschedule or stop timer */	718	/* first reschedule or stop timer */
556	if (w->interval)	719	if (w->interval)
557	{	720	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	721	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	722	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	723	downheap ((WT *)periodics, periodiccnt, 0);
561	}	724	}
562	else	725	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	726	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		727
565	event ((W)w, EV_TIMEOUT);	728	event (EV_A_ (W)w, EV_PERIODIC);
566	}	729	}
567	}	730	}
568		731
569	static void	732	static void
570	periodics_reschedule (ev_tstamp diff)	733	periodics_reschedule (EV_P)
571	{	734	{
572	int i;	735	int i;
573		736
574	/* adjust periodics after time jump */	737	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	738	for (i = 0; i < periodiccnt; ++i)
576	{	739	{
577	struct ev_periodic *w = periodics [i];	740	struct ev_periodic *w = periodics [i];
578		741
579	if (w->interval)	742	if (w->interval)
580	{	743	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	744	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
582		745
583	if (fabs (diff) >= 1e-4)	746	if (fabs (diff) >= 1e-4)
584	{	747	{
585	ev_periodic_stop (w);	748	ev_periodic_stop (EV_A_ w);
586	ev_periodic_start (w);	749	ev_periodic_start (EV_A_ w);
587		750
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	751	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	752	}
590	}	753	}
591	}	754	}
592	}	755	}
593		756
		757	inline int
		758	time_update_monotonic (EV_P)
		759	{
		760	mn_now = get_clock ();
		761
		762	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		763	{
		764	rt_now = rtmn_diff + mn_now;
		765	return 0;
		766	}
		767	else
		768	{
		769	now_floor = mn_now;
		770	rt_now = ev_time ();
		771	return 1;
		772	}
		773	}
		774
594	static void	775	static void
595	time_update (void)	776	time_update (EV_P)
596	{	777	{
597	int i;	778	int i;
598		779
599	ev_now = ev_time ();	780	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	781	if (expect_true (have_monotonic))
602	{	782	{
603	ev_tstamp odiff = diff;	783	if (time_update_monotonic (EV_A))
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	784	{
607	now = get_clock ();	785	ev_tstamp odiff = rtmn_diff;
		786
		787	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		788	{
608	diff = ev_now - now;	789	rtmn_diff = rt_now - mn_now;
609		790
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	791	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	792	return; /* all is well */
612		793
613	ev_now = ev_time ();	794	rt_now = ev_time ();
		795	mn_now = get_clock ();
		796	now_floor = mn_now;
		797	}
		798
		799	periodics_reschedule (EV_A);
		800	/* no timer adjustment, as the monotonic clock doesn't jump */
		801	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
614	}	802	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}	803	}
619	else	804	else
		805	#endif
620	{	806	{
621	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	807	rt_now = ev_time ();
		808
		809	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
622	{	810	{
623	periodics_reschedule (ev_now - now);	811	periodics_reschedule (EV_A);
624		812
625	/* adjust timers. this is easy, as the offset is the same for all */	813	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	814	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	815	timers [i]->at += rt_now - mn_now;
628	}	816	}
629		817
630	now = ev_now;	818	mn_now = rt_now;
631	}	819	}
632	}	820	}
633		821
634	int ev_loop_done;	822	void
		823	ev_ref (EV_P)
		824	{
		825	++activecnt;
		826	}
635		827
		828	void
		829	ev_unref (EV_P)
		830	{
		831	--activecnt;
		832	}
		833
		834	static int loop_done;
		835
		836	void
636	void ev_loop (int flags)	837	ev_loop (EV_P_ int flags)
637	{	838	{
638	double block;	839	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	840	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
640		841
641	do	842	do
642	{	843	{
643	/* queue check watchers (and execute them) */	844	/* queue check watchers (and execute them) */
644	if (preparecnt)	845	if (expect_false (preparecnt))
645	{	846	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	847	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	848	call_pending (EV_A);
648	}	849	}
649		850
650	/* update fd-related kernel structures */	851	/* update fd-related kernel structures */
651	fd_reify ();	852	fd_reify (EV_A);
652		853
653	/* calculate blocking time */	854	/* calculate blocking time */
654		855
655	/* we only need this for !monotonic clockor timers, but as we basically	856	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */	857	always have timers, we just calculate it always */
		858	#if EV_USE_MONOTONIC
		859	if (expect_true (have_monotonic))
		860	time_update_monotonic (EV_A);
		861	else
		862	#endif
		863	{
657	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = rt_now;
		866	}
658		867
659	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	868	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
660	block = 0.;	869	block = 0.;
661	else	870	else
662	{	871	{
663	block = MAX_BLOCKTIME;	872	block = MAX_BLOCKTIME;
664		873
665	if (timercnt)	874	if (timercnt)
666	{	875	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	876	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
668	if (block > to) block = to;	877	if (block > to) block = to;
669	}	878	}
670		879
671	if (periodiccnt)	880	if (periodiccnt)
672	{	881	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	882	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
674	if (block > to) block = to;	883	if (block > to) block = to;
675	}	884	}
676		885
677	if (block < 0.) block = 0.;	886	if (block < 0.) block = 0.;
678	}	887	}
679		888
680	method_poll (block);	889	method_poll (EV_A_ block);
681		890
682	/* update ev_now, do magic */	891	/* update rt_now, do magic */
683	time_update ();	892	time_update (EV_A);
684		893
685	/* queue pending timers and reschedule them */	894	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	895	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	896	periodics_reify (EV_A); /* absolute timers called first */
688		897
689	/* queue idle watchers unless io or timers are pending */	898	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	899	if (!pendingcnt)
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	900	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		901
693	/* queue check watchers, to be executed first */	902	/* queue check watchers, to be executed first */
694	if (checkcnt)	903	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	904	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		905
697	call_pending ();	906	call_pending (EV_A);
698	}	907	}
699	while (!ev_loop_done);	908	while (activecnt && !loop_done);
700		909
701	if (ev_loop_done != 2)	910	if (loop_done != 2)
702	ev_loop_done = 0;	911	loop_done = 0;
		912	}
		913
		914	void
		915	ev_unloop (EV_P_ int how)
		916	{
		917	loop_done = how;
703	}	918	}
704		919
705	/*****************************************************************************/	920	/*****************************************************************************/
706		921
707	static void	922	inline void
708	wlist_add (WL *head, WL elem)	923	wlist_add (WL *head, WL elem)
709	{	924	{
710	elem->next = *head;	925	elem->next = *head;
711	*head = elem;	926	*head = elem;
712	}	927	}
713		928
714	static void	929	inline void
715	wlist_del (WL *head, WL elem)	930	wlist_del (WL *head, WL elem)
716	{	931	{
717	while (*head)	932	while (*head)
718	{	933	{
719	if (*head == elem)	934	if (*head == elem)
…		…
724		939
725	head = &(*head)->next;	940	head = &(*head)->next;
726	}	941	}
727	}	942	}
728		943
729	static void	944	inline void
730	ev_clear (W w)	945	ev_clear_pending (EV_P_ W w)
731	{	946	{
732	if (w->pending)	947	if (w->pending)
733	{	948	{
734	pendings [w->pending - 1].w = 0;	949	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	950	w->pending = 0;
736	}	951	}
737	}	952	}
738		953
739	static void	954	inline void
740	ev_start (W w, int active)	955	ev_start (EV_P_ W w, int active)
741	{	956	{
		957	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		958	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		959
742	w->active = active;	960	w->active = active;
		961	ev_ref (EV_A);
743	}	962	}
744		963
745	static void	964	inline void
746	ev_stop (W w)	965	ev_stop (EV_P_ W w)
747	{	966	{
		967	ev_unref (EV_A);
748	w->active = 0;	968	w->active = 0;
749	}	969	}
750		970
751	/*****************************************************************************/	971	/*****************************************************************************/
752		972
753	void	973	void
754	ev_io_start (struct ev_io *w)	974	ev_io_start (EV_P_ struct ev_io *w)
755	{	975	{
		976	int fd = w->fd;
		977
756	if (ev_is_active (w))	978	if (ev_is_active (w))
757	return;	979	return;
758		980
759	int fd = w->fd;	981	assert (("ev_io_start called with negative fd", fd >= 0));
760		982
761	ev_start ((W)w, 1);	983	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	984	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	985	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		986
765	fd_change (fd);	987	fd_change (EV_A_ fd);
766	}	988	}
767		989
768	void	990	void
769	ev_io_stop (struct ev_io *w)	991	ev_io_stop (EV_P_ struct ev_io *w)
770	{	992	{
771	ev_clear ((W)w);	993	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	994	if (!ev_is_active (w))
773	return;	995	return;
774		996
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	997	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	998	ev_stop (EV_A_ (W)w);
777		999
778	fd_change (w->fd);	1000	fd_change (EV_A_ w->fd);
779	}	1001	}
780		1002
781	void	1003	void
782	ev_timer_start (struct ev_timer *w)	1004	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1005	{
784	if (ev_is_active (w))	1006	if (ev_is_active (w))
785	return;	1007	return;
786		1008
787	w->at += now;	1009	w->at += mn_now;
788		1010
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1011	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1012
791	ev_start ((W)w, ++timercnt);	1013	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1014	array_needsize (timers, timermax, timercnt, );
793	timers [timercnt - 1] = w;	1015	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1016	upheap ((WT *)timers, timercnt - 1);
795	}	1017	}
796		1018
797	void	1019	void
798	ev_timer_stop (struct ev_timer *w)	1020	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1021	{
800	ev_clear ((W)w);	1022	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1023	if (!ev_is_active (w))
802	return;	1024	return;
803		1025
804	if (w->active < timercnt--)	1026	if (w->active < timercnt--)
805	{	1027	{
…		…
807	downheap ((WT *)timers, timercnt, w->active - 1);	1029	downheap ((WT *)timers, timercnt, w->active - 1);
808	}	1030	}
809		1031
810	w->at = w->repeat;	1032	w->at = w->repeat;
811		1033
812	ev_stop ((W)w);	1034	ev_stop (EV_A_ (W)w);
813	}	1035	}
814		1036
815	void	1037	void
816	ev_timer_again (struct ev_timer *w)	1038	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1039	{
818	if (ev_is_active (w))	1040	if (ev_is_active (w))
819	{	1041	{
820	if (w->repeat)	1042	if (w->repeat)
821	{	1043	{
822	w->at = now + w->repeat;	1044	w->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1045	downheap ((WT *)timers, timercnt, w->active - 1);
824	}	1046	}
825	else	1047	else
826	ev_timer_stop (w);	1048	ev_timer_stop (EV_A_ w);
827	}	1049	}
828	else if (w->repeat)	1050	else if (w->repeat)
829	ev_timer_start (w);	1051	ev_timer_start (EV_A_ w);
830	}	1052	}
831		1053
832	void	1054	void
833	ev_periodic_start (struct ev_periodic *w)	1055	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1056	{
835	if (ev_is_active (w))	1057	if (ev_is_active (w))
836	return;	1058	return;
837		1059
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1060	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
839		1061
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1062	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)	1063	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1064	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
843		1065
844	ev_start ((W)w, ++periodiccnt);	1066	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1067	array_needsize (periodics, periodicmax, periodiccnt, );
846	periodics [periodiccnt - 1] = w;	1068	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1069	upheap ((WT *)periodics, periodiccnt - 1);
848	}	1070	}
849		1071
850	void	1072	void
851	ev_periodic_stop (struct ev_periodic *w)	1073	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1074	{
853	ev_clear ((W)w);	1075	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1076	if (!ev_is_active (w))
855	return;	1077	return;
856		1078
857	if (w->active < periodiccnt--)	1079	if (w->active < periodiccnt--)
858	{	1080	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1081	periodics [w->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1082	downheap ((WT *)periodics, periodiccnt, w->active - 1);
861	}	1083	}
862		1084
863	ev_stop ((W)w);	1085	ev_stop (EV_A_ (W)w);
864	}	1086	}
865		1087
		1088	#ifndef SA_RESTART
		1089	# define SA_RESTART 0
		1090	#endif
		1091
866	void	1092	void
867	ev_signal_start (struct ev_signal *w)	1093	ev_signal_start (EV_P_ struct ev_signal *w)
868	{	1094	{
869	if (ev_is_active (w))	1095	if (ev_is_active (w))
870	return;	1096	return;
871		1097
		1098	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1099
872	ev_start ((W)w, 1);	1100	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1101	array_needsize (signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1102	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1103
876	if (!w->next)	1104	if (!w->next)
877	{	1105	{
878	struct sigaction sa;	1106	struct sigaction sa;
879	sa.sa_handler = sighandler;	1107	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1108	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1110	sigaction (w->signum, &sa, 0);
883	}	1111	}
884	}	1112	}
885		1113
886	void	1114	void
887	ev_signal_stop (struct ev_signal *w)	1115	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1116	{
889	ev_clear ((W)w);	1117	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1118	if (!ev_is_active (w))
891	return;	1119	return;
892		1120
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1121	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1122	ev_stop (EV_A_ (W)w);
895		1123
896	if (!signals [w->signum - 1].head)	1124	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1125	signal (w->signum, SIG_DFL);
898	}	1126	}
899		1127
900	void	1128	void
901	ev_idle_start (struct ev_idle *w)	1129	ev_idle_start (EV_P_ struct ev_idle *w)
902	{	1130	{
903	if (ev_is_active (w))	1131	if (ev_is_active (w))
904	return;	1132	return;
905		1133
906	ev_start ((W)w, ++idlecnt);	1134	ev_start (EV_A_ (W)w, ++idlecnt);
907	array_needsize (idles, idlemax, idlecnt, );	1135	array_needsize (idles, idlemax, idlecnt, );
908	idles [idlecnt - 1] = w;	1136	idles [idlecnt - 1] = w;
909	}	1137	}
910		1138
911	void	1139	void
912	ev_idle_stop (struct ev_idle *w)	1140	ev_idle_stop (EV_P_ struct ev_idle *w)
913	{	1141	{
914	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1143	if (ev_is_active (w))
916	return;	1144	return;
917		1145
918	idles [w->active - 1] = idles [--idlecnt];	1146	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
920	}	1148	}
921		1149
922	void	1150	void
923	ev_prepare_start (struct ev_prepare *w)	1151	ev_prepare_start (EV_P_ struct ev_prepare *w)
924	{	1152	{
925	if (ev_is_active (w))	1153	if (ev_is_active (w))
926	return;	1154	return;
927		1155
928	ev_start ((W)w, ++preparecnt);	1156	ev_start (EV_A_ (W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );	1157	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;	1158	prepares [preparecnt - 1] = w;
931	}	1159	}
932		1160
933	void	1161	void
934	ev_prepare_stop (struct ev_prepare *w)	1162	ev_prepare_stop (EV_P_ struct ev_prepare *w)
935	{	1163	{
936	ev_clear ((W)w);	1164	ev_clear_pending (EV_A_ (W)w);
937	if (ev_is_active (w))	1165	if (ev_is_active (w))
938	return;	1166	return;
939		1167
940	prepares [w->active - 1] = prepares [--preparecnt];	1168	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);	1169	ev_stop (EV_A_ (W)w);
942	}	1170	}
943		1171
944	void	1172	void
945	ev_check_start (struct ev_check *w)	1173	ev_check_start (EV_P_ struct ev_check *w)
946	{	1174	{
947	if (ev_is_active (w))	1175	if (ev_is_active (w))
948	return;	1176	return;
949		1177
950	ev_start ((W)w, ++checkcnt);	1178	ev_start (EV_A_ (W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );	1179	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;	1180	checks [checkcnt - 1] = w;
953	}	1181	}
954		1182
955	void	1183	void
956	ev_check_stop (struct ev_check *w)	1184	ev_check_stop (EV_P_ struct ev_check *w)
957	{	1185	{
958	ev_clear ((W)w);	1186	ev_clear_pending (EV_A_ (W)w);
959	if (ev_is_active (w))	1187	if (ev_is_active (w))
960	return;	1188	return;
961		1189
962	checks [w->active - 1] = checks [--checkcnt];	1190	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
964	}	1192	}
965		1193
966	void	1194	void
967	ev_child_start (struct ev_child *w)	1195	ev_child_start (EV_P_ struct ev_child *w)
968	{	1196	{
969	if (ev_is_active (w))	1197	if (ev_is_active (w))
970	return;	1198	return;
971		1199
972	ev_start ((W)w, 1);	1200	ev_start (EV_A_ (W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1201	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}	1202	}
975		1203
976	void	1204	void
977	ev_child_stop (struct ev_child *w)	1205	ev_child_stop (EV_P_ struct ev_child *w)
978	{	1206	{
979	ev_clear ((W)w);	1207	ev_clear_pending (EV_A_ (W)w);
980	if (ev_is_active (w))	1208	if (ev_is_active (w))
981	return;	1209	return;
982		1210
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1211	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1212	ev_stop (EV_A_ (W)w);
985	}	1213	}
986		1214
987	/*****************************************************************************/	1215	/*****************************************************************************/
988		1216
989	struct ev_once	1217	struct ev_once
…		…
993	void (cb)(int revents, void arg);	1221	void (cb)(int revents, void arg);
994	void *arg;	1222	void *arg;
995	};	1223	};
996		1224
997	static void	1225	static void
998	once_cb (struct ev_once *once, int revents)	1226	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1227	{
1000	void (cb)(int revents, void arg) = once->cb;	1228	void (cb)(int revents, void arg) = once->cb;
1001	void *arg = once->arg;	1229	void *arg = once->arg;
1002		1230
1003	ev_io_stop (&once->io);	1231	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1232	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1233	free (once);
1006		1234
1007	cb (revents, arg);	1235	cb (revents, arg);
1008	}	1236	}
1009		1237
1010	static void	1238	static void
1011	once_cb_io (struct ev_io *w, int revents)	1239	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1240	{
1013	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1241	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1014	}	1242	}
1015		1243
1016	static void	1244	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1245	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1246	{
1019	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1247	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1020	}	1248	}
1021		1249
1022	void	1250	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1251	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1024	{	1252	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1253	struct ev_once *once = malloc (sizeof (struct ev_once));
1026		1254
1027	if (!once)	1255	if (!once)
1028	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1256	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1033		1261
1034	ev_watcher_init (&once->io, once_cb_io);	1262	ev_watcher_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1263	if (fd >= 0)
1036	{	1264	{
1037	ev_io_set (&once->io, fd, events);	1265	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1266	ev_io_start (EV_A_ &once->io);
1039	}	1267	}
1040		1268
1041	ev_watcher_init (&once->to, once_cb_to);	1269	ev_watcher_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1270	if (timeout >= 0.)
1043	{	1271	{
1044	ev_timer_set (&once->to, timeout, 0.);	1272	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1273	ev_timer_start (EV_A_ &once->to);
1046	}	1274	}
1047	}	1275	}
1048	}	1276	}
1049		1277
1050	/*****************************************************************************/	1278	/*****************************************************************************/

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Comparing libev/ev.c (file contents): Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs. Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC