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

Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
		78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_REALTIME
		98	# define EV_USE_REALTIME 1
		99	#endif
		100
		101	/**/
		102
47	# ifdef CLOCK_MONOTONIC	103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	105	# define EV_USE_MONOTONIC 0
49	# endif	106	#endif
50	#endif
51		107
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	108	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
62	#endif	111	#endif
		112
		113	/**/
63		114
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	116	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	117	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		118	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		119
68	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		135
70	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
73		139
74	static ev_tstamp now, diff; /* monotonic clock */	140	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		141
84	/*****************************************************************************/	142	/*****************************************************************************/
85		143
86	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
87	ev_time (void)	178	ev_time (void)
88	{	179	{
89	#if HAVE_REALTIME	180	#if EV_USE_REALTIME
90	struct timespec ts;	181	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	183	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	184	#else
94	struct timeval tv;	185	struct timeval tv;
95	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	188	#endif
98	}	189	}
99		190
100	static ev_tstamp	191	inline ev_tstamp
101	get_clock (void)	192	get_clock (void)
102	{	193	{
103	#if HAVE_MONOTONIC	194	#if EV_USE_MONOTONIC
104	if (have_monotonic)	195	if (expect_true (have_monotonic))
105	{	196	{
106	struct timespec ts;	197	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	200	}
110	#endif	201	#endif
111		202
112	return ev_time ();	203	return ev_time ();
113	}	204	}
114		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
		212	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		213
115	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
117	{ \	216	{ \
118	int newcnt = cur; \	217	int newcnt = cur; \
119	do \	218	do \
120	{ \	219	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	220	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	221	} \
123	while ((cnt) > newcnt); \	222	while ((cnt) > newcnt); \
124	\	223	\
125	base = realloc (base, sizeof (base) (newcnt)); \	224	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	225	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	226	cur = newcnt; \
128	}	227	}
129		228
130	/*****************************************************************************/	229	/*****************************************************************************/
131		230
132	typedef struct
133	{
134	struct ev_io *head;
135	int events;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static void	231	static void
142	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
143	{	233	{
144	while (count--)	234	while (count--)
145	{	235	{
146	base->head = 0;	236	base->head = 0;
147	base->events = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
148	++base;	240	++base;
149	}	241	}
150	}	242	}
151		243
152	typedef struct
153	{
154	W w;
155	int events;
156	} ANPENDING;
157
158	static ANPENDING *pendings;
159	static int pendingmax, pendingcnt;
160
161	static void	244	static void
162	event (W w, int events)	245	event (EV_P_ W w, int events)
163	{	246	{
164	if (w->active)	247	if (w->pending)
165	{	248	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	249	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		250	return;
170	}	251	}
171	}
172		252
		253	w->pending = ++pendingcnt [ABSPRI (w)];
		254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		255	pendings [ABSPRI (w)][w->pending - 1].w = w;
		256	pendings [ABSPRI (w)][w->pending - 1].events = events;
		257	}
		258
173	static void	259	static void
174	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	261	{
176	int i;	262	int i;
177		263
178	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	265	event (EV_A_ events [i], type);
180	}	266	}
181		267
182	static void	268	static void
183	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
184	{	270	{
185	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	272	struct ev_io *w;
187		273
188	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
189	{	275	{
190	int ev = w->events & events;	276	int ev = w->events & events;
191		277
192	if (ev)	278	if (ev)
193	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
194	}	280	}
195	}	281	}
196		282
197	/*****************************************************************************/	283	/*****************************************************************************/
198		284
199	static int *fdchanges;
200	static int fdchangemax, fdchangecnt;
201
202	static void	285	static void
203	fd_reify (void)	286	fd_reify (EV_P)
204	{	287	{
205	int i;	288	int i;
206		289
207	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
208	{	291	{
…		…
210	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	294	struct ev_io *w;
212		295
213	int events = 0;	296	int events = 0;
214		297
215	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
216	events \|= w->events;	299	events \|= w->events;
217		300
218	anfd->events &= ~EV_REIFY;	301	anfd->reify = 0;
219		302
220	if (anfd->events != events)	303	if (anfd->events != events)
221	{	304	{
222	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
223	anfd->events = events;	306	anfd->events = events;
224	}	307	}
225	}	308	}
226		309
227	fdchangecnt = 0;	310	fdchangecnt = 0;
228	}	311	}
229		312
230	static void	313	static void
231	fd_change (int fd)	314	fd_change (EV_P_ int fd)
232	{	315	{
233	if (anfds [fd].events & EV_REIFY)	316	if (anfds [fd].reify \|\| fdchangecnt < 0)
234	return;	317	return;
235		318
236	anfds [fd].events \|= EV_REIFY;	319	anfds [fd].reify = 1;
237		320
238	++fdchangecnt;	321	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
240	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
241	}	324	}
242		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		335	}
		336	}
		337
243	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
244	static void	339	static void
245	fd_recheck (void)	340	fd_ebadf (EV_P)
246	{	341	{
247	int fd;	342	int fd;
248		343
249	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	345	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
252	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
253	{	358	{
254	event ((W)anfds [fd].head, EV_ERROR);	359	close (fd);
255	evio_stop (anfds [fd].head);	360	fd_kill (EV_A_ fd);
		361	return;
256	}	362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
257	}	378	}
258		379
259	/*****************************************************************************/	380	/*****************************************************************************/
260		381
261	static struct ev_timer **timers;
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266
267	static void	382	static void
268	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
269	{	384	{
270	WT w = timers [k];	385	WT w = heap [k];
271		386
272	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
273	{	388	{
274	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
276	k >>= 1;	391	k >>= 1;
277	}	392	}
278		393
279	timers [k] = w;	394	heap [k] = w;
280	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
281		396
282	}	397	}
283		398
284	static void	399	static void
285	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
286	{	401	{
287	WT w = timers [k];	402	WT w = heap [k];
288		403
289	while (k < (N >> 1))	404	while (k < (N >> 1))
290	{	405	{
291	int j = k << 1;	406	int j = k << 1;
292		407
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	409	++j;
295		410
296	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
297	break;	412	break;
298		413
299	timers [k] = timers [j];	414	heap [k] = heap [j];
300	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
301	k = j;	416	k = j;
302	}	417	}
303		418
304	timers [k] = w;	419	heap [k] = w;
305	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
306	}	421	}
307		422
308	/*****************************************************************************/	423	/*****************************************************************************/
309		424
310	typedef struct	425	typedef struct
311	{	426	{
312	struct ev_signal *head;	427	struct ev_watcher_list *head;
313	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
314	} ANSIG;	429	} ANSIG;
315		430
316	static ANSIG *signals;	431	static ANSIG *signals;
317	static int signalmax;	432	static int signalmax;
318		433
319	static int sigpipe [2];	434	static int sigpipe [2];
320	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;	436	static struct ev_io sigev;
322		437
323	static void	438	static void
324	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
325	{	440	{
326	while (count--)	441	while (count--)
327	{	442	{
328	base->head = 0;	443	base->head = 0;
329	base->gotsig = 0;	444	base->gotsig = 0;
		445
330	++base;	446	++base;
331	}	447	}
332	}	448	}
333		449
334	static void	450	static void
…		…
336	{	452	{
337	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
338		454
339	if (!gotsig)	455	if (!gotsig)
340	{	456	{
		457	int old_errno = errno;
341	gotsig = 1;	458	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
343	}	461	}
344	}	462	}
345		463
346	static void	464	static void
347	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	466	{
349	struct ev_signal *w;	467	struct ev_watcher_list *w;
350	int sig;	468	int signum;
351		469
		470	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	471	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		472
355	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
357	{	475	{
358	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
359		477
360	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
362	}	480	}
363	}	481	}
364		482
365	static void	483	static void
366	siginit (void)	484	siginit (EV_P)
367	{	485	{
		486	#ifndef WIN32
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370		489
371	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
374		494
375	evio_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	evio_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	498	}
378		499
379	/*****************************************************************************/	500	/*****************************************************************************/
380		501
381	static struct ev_idle **idles;	502	#ifndef WIN32
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391		503
392	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
393	static struct ev_signal childev;	505	static struct ev_signal childev;
394		506
395	#ifndef WCONTINUED	507	#ifndef WCONTINUED
396	# define WCONTINUED 0	508	# define WCONTINUED 0
397	#endif	509	#endif
398		510
399	static void	511	static void
400	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	513	{
402	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		517	if (w->pid == pid \|\| !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it now */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
403	int pid, status;	529	int pid, status;
404		530
405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
407	if (w->pid == pid \|\| w->pid == -1)	533	/* make sure we are called again until all childs have been reaped */
408	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
409	w->status = status;	535
410	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
411	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
412	}	539	}
		540
		541	#endif
413		542
414	/*****************************************************************************/	543	/*****************************************************************************/
415		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
416	#if HAVE_EPOLL	548	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	549	# include "ev_epoll.c"
418	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
419	#if HAVE_SELECT	554	#if EV_USE_SELECT
420	# include "ev_select.c"	555	# include "ev_select.c"
421	#endif	556	#endif
422		557
423	int	558	int
424	ev_version_major (void)	559	ev_version_major (void)
…		…
430	ev_version_minor (void)	565	ev_version_minor (void)
431	{	566	{
432	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
433	}	568	}
434		569
435	int ev_init (int flags)	570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
436	{	573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	\|\| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
437	if (!ev_method)	591	if (!method)
438	{	592	{
439	#if HAVE_MONOTONIC	593	#if EV_USE_MONOTONIC
440	{	594	{
441	struct timespec ts;	595	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	597	have_monotonic = 1;
444	}	598	}
445	#endif	599	#endif
446		600
447	ev_now = ev_time ();	601	rt_now = ev_time ();
448	now = get_clock ();	602	mn_now = get_clock ();
		603	now_floor = mn_now;
449	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
450		605
		606	if (methods == EVMETHOD_AUTO)
		607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
		610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
		616	#if EV_USE_EPOLL
		617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		621	#endif
		622	#if EV_USE_SELECT
		623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		624	#endif
		625	}
		626	}
		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/TODO/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/TODO/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
451	if (pipe (sigpipe))	702	if (pipe (sigpipe))
452	return 0;	703	return 0;
453		704
454	ev_method = EVMETHOD_NONE;	705	if (!default_loop)
455	#if HAVE_EPOLL	706	{
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
457	#endif	711	#endif
458	#if HAVE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);
460	#endif
461		712
		713	loop_init (EV_A_ methods);
		714
462	if (ev_method)	715	if (ev_method (EV_A))
463	{	716	{
464	evw_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
465	siginit ();	719	siginit (EV_A);
466		720
		721	#ifndef WIN32
467	evsignal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
468	evsignal_start (&childev);	724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
469	}	727	}
		728	else
		729	default_loop = 0;
470	}	730	}
471		731
472	return ev_method;	732	return default_loop;
473	}	733	}
474		734
475	/*****************************************************************************/
476
477	void	735	void
478	ev_prefork (void)	736	ev_default_destroy (void)
479	{	737	{
480	/* nop */	738	#if EV_MULTIPLICITY
481	}	739	struct ev_loop *loop = default_loop;
482
483	void
484	ev_postfork_parent (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_child (void)
491	{
492	#if HAVE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();
495	#endif	740	#endif
496		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
497	evio_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
498	close (sigpipe [0]);	764	close (sigpipe [0]);
499	close (sigpipe [1]);	765	close (sigpipe [1]);
500	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
501	siginit ();	769	siginit (EV_A);
502	}	770	}
503		771
504	/*****************************************************************************/	772	/*****************************************************************************/
505		773
506	static void	774	static void
507	call_pending (void)	775	call_pending (EV_P)
508	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	780	while (pendingcnt [pri])
510	{	781	{
511	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		783
513	if (p->w)	784	if (p->w)
514	{	785	{
515	p->w->pending = 0;	786	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
517	}	788	}
518	}	789	}
519	}	790	}
520		791
521	static void	792	static void
522	timers_reify (void)	793	timers_reify (EV_P)
523	{	794	{
524	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
525	{	796	{
526	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
527		798
528	event ((W)w, EV_TIMEOUT);	799	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		800
530	/* first reschedule or stop timer */	801	/* first reschedule or stop timer */
531	if (w->repeat)	802	if (w->repeat)
532	{	803	{
		804	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	805	w->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	806	downheap ((WT *)timers, timercnt, 0);
536	}	807	}
537	else	808	else
538	evtimer_stop (w); /* nonrepeating: stop timer */	809	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		810
		811	event (EV_A_ (W)w, EV_TIMEOUT);
		812	}
		813	}
		814
542	static void	815	static void
543	periodics_reify (void)	816	periodics_reify (EV_P)
544	{	817	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	818	while (periodiccnt && periodics [0]->at <= rt_now)
546	{	819	{
547	struct ev_periodic *w = periodics [0];	820	struct ev_periodic *w = periodics [0];
		821
		822	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
548		823
549	/* first reschedule or stop timer */	824	/* first reschedule or stop timer */
550	if (w->interval)	825	if (w->interval)
551	{	826	{
552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	827	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
553	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	828	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
554	downheap ((WT *)periodics, periodiccnt, 0);	829	downheap ((WT *)periodics, periodiccnt, 0);
555	}	830	}
556	else	831	else
557	evperiodic_stop (w); /* nonrepeating: stop timer */	832	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		833
559	event ((W)w, EV_TIMEOUT);	834	event (EV_A_ (W)w, EV_PERIODIC);
560	}	835	}
561	}	836	}
562		837
563	static void	838	static void
564	periodics_reschedule (ev_tstamp diff)	839	periodics_reschedule (EV_P)
565	{	840	{
566	int i;	841	int i;
567		842
568	/* adjust periodics after time jump */	843	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	844	for (i = 0; i < periodiccnt; ++i)
570	{	845	{
571	struct ev_periodic *w = periodics [i];	846	struct ev_periodic *w = periodics [i];
572		847
573	if (w->interval)	848	if (w->interval)
574	{	849	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	850	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
576		851
577	if (fabs (diff) >= 1e-4)	852	if (fabs (diff) >= 1e-4)
578	{	853	{
579	evperiodic_stop (w);	854	ev_periodic_stop (EV_A_ w);
580	evperiodic_start (w);	855	ev_periodic_start (EV_A_ w);
581		856
582	i = 0; /* restart loop, inefficient, but time jumps should be rare */	857	i = 0; /* restart loop, inefficient, but time jumps should be rare */
583	}	858	}
584	}	859	}
585	}	860	}
586	}	861	}
587		862
		863	inline int
		864	time_update_monotonic (EV_P)
		865	{
		866	mn_now = get_clock ();
		867
		868	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		869	{
		870	rt_now = rtmn_diff + mn_now;
		871	return 0;
		872	}
		873	else
		874	{
		875	now_floor = mn_now;
		876	rt_now = ev_time ();
		877	return 1;
		878	}
		879	}
		880
588	static void	881	static void
589	time_update (void)	882	time_update (EV_P)
590	{	883	{
591	int i;	884	int i;
592		885
593	ev_now = ev_time ();	886	#if EV_USE_MONOTONIC
594
595	if (have_monotonic)	887	if (expect_true (have_monotonic))
596	{	888	{
597	ev_tstamp odiff = diff;	889	if (time_update_monotonic (EV_A))
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	890	{
601	now = get_clock ();	891	ev_tstamp odiff = rtmn_diff;
		892
		893	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		894	{
602	diff = ev_now - now;	895	rtmn_diff = rt_now - mn_now;
603		896
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)	897	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
605	return; /* all is well */	898	return; /* all is well */
606		899
607	ev_now = ev_time ();	900	rt_now = ev_time ();
		901	mn_now = get_clock ();
		902	now_floor = mn_now;
		903	}
		904
		905	periodics_reschedule (EV_A);
		906	/* no timer adjustment, as the monotonic clock doesn't jump */
		907	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
608	}	908	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}	909	}
613	else	910	else
		911	#endif
614	{	912	{
615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	913	rt_now = ev_time ();
		914
		915	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
616	{	916	{
617	periodics_reschedule (ev_now - now);	917	periodics_reschedule (EV_A);
618		918
619	/* adjust timers. this is easy, as the offset is the same for all */	919	/* adjust timers. this is easy, as the offset is the same for all */
620	for (i = 0; i < timercnt; ++i)	920	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	921	timers [i]->at += rt_now - mn_now;
622	}	922	}
623		923
624	now = ev_now;	924	mn_now = rt_now;
625	}	925	}
626	}	926	}
627		927
628	int ev_loop_done;	928	void
		929	ev_ref (EV_P)
		930	{
		931	++activecnt;
		932	}
629		933
		934	void
		935	ev_unref (EV_P)
		936	{
		937	--activecnt;
		938	}
		939
		940	static int loop_done;
		941
		942	void
630	void ev_loop (int flags)	943	ev_loop (EV_P_ int flags)
631	{	944	{
632	double block;	945	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	946	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
634		947
635	do	948	do
636	{	949	{
637	/* queue check watchers (and execute them) */	950	/* queue check watchers (and execute them) */
638	if (preparecnt)	951	if (expect_false (preparecnt))
639	{	952	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	953	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	954	call_pending (EV_A);
642	}	955	}
643		956
644	/* update fd-related kernel structures */	957	/* update fd-related kernel structures */
645	fd_reify ();	958	fd_reify (EV_A);
646		959
647	/* calculate blocking time */	960	/* calculate blocking time */
648		961
649	/* we only need this for !monotonic clockor timers, but as we basically	962	/* we only need this for !monotonic clockor timers, but as we basically
650	always have timers, we just calculate it always */	963	always have timers, we just calculate it always */
		964	#if EV_USE_MONOTONIC
		965	if (expect_true (have_monotonic))
		966	time_update_monotonic (EV_A);
		967	else
		968	#endif
		969	{
651	ev_now = ev_time ();	970	rt_now = ev_time ();
		971	mn_now = rt_now;
		972	}
652		973
653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	974	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
654	block = 0.;	975	block = 0.;
655	else	976	else
656	{	977	{
657	block = MAX_BLOCKTIME;	978	block = MAX_BLOCKTIME;
658		979
659	if (timercnt)	980	if (timercnt)
660	{	981	{
661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	982	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
662	if (block > to) block = to;	983	if (block > to) block = to;
663	}	984	}
664		985
665	if (periodiccnt)	986	if (periodiccnt)
666	{	987	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	988	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
668	if (block > to) block = to;	989	if (block > to) block = to;
669	}	990	}
670		991
671	if (block < 0.) block = 0.;	992	if (block < 0.) block = 0.;
672	}	993	}
673		994
674	method_poll (block);	995	method_poll (EV_A_ block);
675		996
676	/* update ev_now, do magic */	997	/* update rt_now, do magic */
677	time_update ();	998	time_update (EV_A);
678		999
679	/* queue pending timers and reschedule them */	1000	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	1001	timers_reify (EV_A); /* relative timers called last */
681	periodics_reify (); /* absolute timers called first */	1002	periodics_reify (EV_A); /* absolute timers called first */
682		1003
683	/* queue idle watchers unless io or timers are pending */	1004	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	1005	if (!pendingcnt)
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	1006	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		1007
687	/* queue check watchers, to be executed first */	1008	/* queue check watchers, to be executed first */
688	if (checkcnt)	1009	if (checkcnt)
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	1010	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		1011
691	call_pending ();	1012	call_pending (EV_A);
692	}	1013	}
693	while (!ev_loop_done);	1014	while (activecnt && !loop_done);
694		1015
695	if (ev_loop_done != 2)	1016	if (loop_done != 2)
696	ev_loop_done = 0;	1017	loop_done = 0;
		1018	}
		1019
		1020	void
		1021	ev_unloop (EV_P_ int how)
		1022	{
		1023	loop_done = how;
697	}	1024	}
698		1025
699	/*****************************************************************************/	1026	/*****************************************************************************/
700		1027
701	static void	1028	inline void
702	wlist_add (WL *head, WL elem)	1029	wlist_add (WL *head, WL elem)
703	{	1030	{
704	elem->next = *head;	1031	elem->next = *head;
705	*head = elem;	1032	*head = elem;
706	}	1033	}
707		1034
708	static void	1035	inline void
709	wlist_del (WL *head, WL elem)	1036	wlist_del (WL *head, WL elem)
710	{	1037	{
711	while (*head)	1038	while (*head)
712	{	1039	{
713	if (*head == elem)	1040	if (*head == elem)
…		…
718		1045
719	head = &(*head)->next;	1046	head = &(*head)->next;
720	}	1047	}
721	}	1048	}
722		1049
723	static void	1050	inline void
724	ev_clear (W w)	1051	ev_clear_pending (EV_P_ W w)
725	{	1052	{
726	if (w->pending)	1053	if (w->pending)
727	{	1054	{
728	pendings [w->pending - 1].w = 0;	1055	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	1056	w->pending = 0;
730	}	1057	}
731	}	1058	}
732		1059
733	static void	1060	inline void
734	ev_start (W w, int active)	1061	ev_start (EV_P_ W w, int active)
735	{	1062	{
		1063	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1064	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1065
736	w->active = active;	1066	w->active = active;
		1067	ev_ref (EV_A);
737	}	1068	}
738		1069
739	static void	1070	inline void
740	ev_stop (W w)	1071	ev_stop (EV_P_ W w)
741	{	1072	{
		1073	ev_unref (EV_A);
742	w->active = 0;	1074	w->active = 0;
743	}	1075	}
744		1076
745	/*****************************************************************************/	1077	/*****************************************************************************/
746		1078
747	void	1079	void
748	evio_start (struct ev_io *w)	1080	ev_io_start (EV_P_ struct ev_io *w)
749	{	1081	{
		1082	int fd = w->fd;
		1083
750	if (ev_is_active (w))	1084	if (ev_is_active (w))
751	return;	1085	return;
752		1086
753	int fd = w->fd;	1087	assert (("ev_io_start called with negative fd", fd >= 0));
754		1088
755	ev_start ((W)w, 1);	1089	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1090	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1091	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		1092
759	fd_change (fd);	1093	fd_change (EV_A_ fd);
760	}	1094	}
761		1095
762	void	1096	void
763	evio_stop (struct ev_io *w)	1097	ev_io_stop (EV_P_ struct ev_io *w)
764	{	1098	{
765	ev_clear ((W)w);	1099	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	1100	if (!ev_is_active (w))
767	return;	1101	return;
768		1102
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1103	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
771		1105
772	fd_change (w->fd);	1106	fd_change (EV_A_ w->fd);
773	}	1107	}
774		1108
775	void	1109	void
776	evtimer_start (struct ev_timer *w)	1110	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	1111	{
778	if (ev_is_active (w))	1112	if (ev_is_active (w))
779	return;	1113	return;
780		1114
781	w->at += now;	1115	w->at += mn_now;
782		1116
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1117	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		1118
785	ev_start ((W)w, ++timercnt);	1119	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1120	array_needsize (timers, timermax, timercnt, );
787	timers [timercnt - 1] = w;	1121	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1122	upheap ((WT *)timers, timercnt - 1);
789	}	1123	}
790		1124
791	void	1125	void
792	evtimer_stop (struct ev_timer *w)	1126	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	1127	{
794	ev_clear ((W)w);	1128	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
796	return;	1130	return;
797		1131
798	if (w->active < timercnt--)	1132	if (w->active < timercnt--)
799	{	1133	{
…		…
801	downheap ((WT *)timers, timercnt, w->active - 1);	1135	downheap ((WT *)timers, timercnt, w->active - 1);
802	}	1136	}
803		1137
804	w->at = w->repeat;	1138	w->at = w->repeat;
805		1139
806	ev_stop ((W)w);	1140	ev_stop (EV_A_ (W)w);
807	}	1141	}
808		1142
809	void	1143	void
810	evtimer_again (struct ev_timer *w)	1144	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	1145	{
812	if (ev_is_active (w))	1146	if (ev_is_active (w))
813	{	1147	{
814	if (w->repeat)	1148	if (w->repeat)
815	{	1149	{
816	w->at = now + w->repeat;	1150	w->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, w->active - 1);
818	}	1152	}
819	else	1153	else
820	evtimer_stop (w);	1154	ev_timer_stop (EV_A_ w);
821	}	1155	}
822	else if (w->repeat)	1156	else if (w->repeat)
823	evtimer_start (w);	1157	ev_timer_start (EV_A_ w);
824	}	1158	}
825		1159
826	void	1160	void
827	evperiodic_start (struct ev_periodic *w)	1161	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1162	{
829	if (ev_is_active (w))	1163	if (ev_is_active (w))
830	return;	1164	return;
831		1165
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1166	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
833		1167
834	/* this formula differs from the one in periodic_reify because we do not always round up */	1168	/* this formula differs from the one in periodic_reify because we do not always round up */
835	if (w->interval)	1169	if (w->interval)
836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1170	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
837		1171
838	ev_start ((W)w, ++periodiccnt);	1172	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1173	array_needsize (periodics, periodicmax, periodiccnt, );
840	periodics [periodiccnt - 1] = w;	1174	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1175	upheap ((WT *)periodics, periodiccnt - 1);
842	}	1176	}
843		1177
844	void	1178	void
845	evperiodic_stop (struct ev_periodic *w)	1179	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1180	{
847	ev_clear ((W)w);	1181	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1182	if (!ev_is_active (w))
849	return;	1183	return;
850		1184
851	if (w->active < periodiccnt--)	1185	if (w->active < periodiccnt--)
852	{	1186	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1187	periodics [w->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1188	downheap ((WT *)periodics, periodiccnt, w->active - 1);
855	}	1189	}
856		1190
857	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
858	}	1192	}
859		1193
860	void	1194	void
861	evsignal_start (struct ev_signal *w)	1195	ev_idle_start (EV_P_ struct ev_idle *w)
862	{	1196	{
863	if (ev_is_active (w))	1197	if (ev_is_active (w))
864	return;	1198	return;
865		1199
		1200	ev_start (EV_A_ (W)w, ++idlecnt);
		1201	array_needsize (idles, idlemax, idlecnt, );
		1202	idles [idlecnt - 1] = w;
		1203	}
		1204
		1205	void
		1206	ev_idle_stop (EV_P_ struct ev_idle *w)
		1207	{
		1208	ev_clear_pending (EV_A_ (W)w);
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	idles [w->active - 1] = idles [--idlecnt];
		1213	ev_stop (EV_A_ (W)w);
		1214	}
		1215
		1216	void
		1217	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1218	{
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	ev_start (EV_A_ (W)w, ++preparecnt);
		1223	array_needsize (prepares, preparemax, preparecnt, );
		1224	prepares [preparecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	prepares [w->active - 1] = prepares [--preparecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_check_start (EV_P_ struct ev_check *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++checkcnt);
		1245	array_needsize (checks, checkmax, checkcnt, );
		1246	checks [checkcnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_check_stop (EV_P_ struct ev_check *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	checks [w->active - 1] = checks [--checkcnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	#ifndef SA_RESTART
		1261	# define SA_RESTART 0
		1262	#endif
		1263
		1264	void
		1265	ev_signal_start (EV_P_ struct ev_signal *w)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1269	#endif
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1274
866	ev_start ((W)w, 1);	1275	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1276	array_needsize (signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1277	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1278
870	if (!w->next)	1279	if (!w->next)
871	{	1280	{
872	struct sigaction sa;	1281	struct sigaction sa;
873	sa.sa_handler = sighandler;	1282	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1283	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1284	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1285	sigaction (w->signum, &sa, 0);
877	}	1286	}
878	}	1287	}
879		1288
880	void	1289	void
881	evsignal_stop (struct ev_signal *w)	1290	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1291	{
883	ev_clear ((W)w);	1292	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1293	if (!ev_is_active (w))
885	return;	1294	return;
886		1295
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1296	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1297	ev_stop (EV_A_ (W)w);
889		1298
890	if (!signals [w->signum - 1].head)	1299	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1300	signal (w->signum, SIG_DFL);
892	}	1301	}
893		1302
894	void evidle_start (struct ev_idle *w)	1303	void
		1304	ev_child_start (EV_P_ struct ev_child *w)
895	{	1305	{
		1306	#if EV_MULTIPLICITY
		1307	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1308	#endif
896	if (ev_is_active (w))	1309	if (ev_is_active (w))
897	return;	1310	return;
898		1311
899	ev_start ((W)w, ++idlecnt);	1312	ev_start (EV_A_ (W)w, 1);
900	array_needsize (idles, idlemax, idlecnt, );	1313	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
901	idles [idlecnt - 1] = w;
902	}	1314	}
903		1315
904	void evidle_stop (struct ev_idle *w)	1316	void
		1317	ev_child_stop (EV_P_ struct ev_child *w)
905	{	1318	{
906	ev_clear ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
907	if (ev_is_active (w))	1320	if (ev_is_active (w))
908	return;	1321	return;
909		1322
910	idles [w->active - 1] = idles [--idlecnt];
911	ev_stop ((W)w);
912	}
913
914	void evprepare_start (struct ev_prepare *w)
915	{
916	if (ev_is_active (w))
917	return;
918
919	ev_start ((W)w, ++preparecnt);
920	array_needsize (prepares, preparemax, preparecnt, );
921	prepares [preparecnt - 1] = w;
922	}
923
924	void evprepare_stop (struct ev_prepare *w)
925	{
926	ev_clear ((W)w);
927	if (ev_is_active (w))
928	return;
929
930	prepares [w->active - 1] = prepares [--preparecnt];
931	ev_stop ((W)w);
932	}
933
934	void evcheck_start (struct ev_check *w)
935	{
936	if (ev_is_active (w))
937	return;
938
939	ev_start ((W)w, ++checkcnt);
940	array_needsize (checks, checkmax, checkcnt, );
941	checks [checkcnt - 1] = w;
942	}
943
944	void evcheck_stop (struct ev_check *w)
945	{
946	ev_clear ((W)w);
947	if (ev_is_active (w))
948	return;
949
950	checks [w->active - 1] = checks [--checkcnt];
951	ev_stop ((W)w);
952	}
953
954	void evchild_start (struct ev_child *w)
955	{
956	if (ev_is_active (w))
957	return;
958
959	ev_start ((W)w, 1);
960	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
961	}
962
963	void evchild_stop (struct ev_child *w)
964	{
965	ev_clear ((W)w);
966	if (ev_is_active (w))
967	return;
968
969	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1323	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	ev_stop ((W)w);	1324	ev_stop (EV_A_ (W)w);
971	}	1325	}
972		1326
973	/*****************************************************************************/	1327	/*****************************************************************************/
974		1328
975	struct ev_once	1329	struct ev_once
…		…
979	void (cb)(int revents, void arg);	1333	void (cb)(int revents, void arg);
980	void *arg;	1334	void *arg;
981	};	1335	};
982		1336
983	static void	1337	static void
984	once_cb (struct ev_once *once, int revents)	1338	once_cb (EV_P_ struct ev_once *once, int revents)
985	{	1339	{
986	void (cb)(int revents, void arg) = once->cb;	1340	void (cb)(int revents, void arg) = once->cb;
987	void *arg = once->arg;	1341	void *arg = once->arg;
988		1342
989	evio_stop (&once->io);	1343	ev_io_stop (EV_A_ &once->io);
990	evtimer_stop (&once->to);	1344	ev_timer_stop (EV_A_ &once->to);
991	free (once);	1345	free (once);
992		1346
993	cb (revents, arg);	1347	cb (revents, arg);
994	}	1348	}
995		1349
996	static void	1350	static void
997	once_cb_io (struct ev_io *w, int revents)	1351	once_cb_io (EV_P_ struct ev_io *w, int revents)
998	{	1352	{
999	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1353	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1000	}	1354	}
1001		1355
1002	static void	1356	static void
1003	once_cb_to (struct ev_timer *w, int revents)	1357	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1004	{	1358	{
1005	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1359	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1006	}	1360	}
1007		1361
1008	void	1362	void
1009	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1363	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1010	{	1364	{
1011	struct ev_once *once = malloc (sizeof (struct ev_once));	1365	struct ev_once *once = malloc (sizeof (struct ev_once));
1012		1366
1013	if (!once)	1367	if (!once)
1014	cb (EV_ERROR, arg);	1368	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1015	else	1369	else
1016	{	1370	{
1017	once->cb = cb;	1371	once->cb = cb;
1018	once->arg = arg;	1372	once->arg = arg;
1019		1373
1020	evw_init (&once->io, once_cb_io);	1374	ev_watcher_init (&once->io, once_cb_io);
1021
1022	if (fd >= 0)	1375	if (fd >= 0)
1023	{	1376	{
1024	evio_set (&once->io, fd, events);	1377	ev_io_set (&once->io, fd, events);
1025	evio_start (&once->io);	1378	ev_io_start (EV_A_ &once->io);
1026	}	1379	}
1027		1380
1028	evw_init (&once->to, once_cb_to);	1381	ev_watcher_init (&once->to, once_cb_to);
1029
1030	if (timeout >= 0.)	1382	if (timeout >= 0.)
1031	{	1383	{
1032	evtimer_set (&once->to, timeout, 0.);	1384	ev_timer_set (&once->to, timeout, 0.);
1033	evtimer_start (&once->to);	1385	ev_timer_start (EV_A_ &once->to);
1034	}	1386	}
1035	}	1387	}
1036	}	1388	}
1037		1389
1038	/*****************************************************************************/
1039
1040	#if 0
1041
1042	struct ev_io wio;
1043
1044	static void
1045	sin_cb (struct ev_io *w, int revents)
1046	{
1047	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1048	}
1049
1050	static void
1051	ocb (struct ev_timer *w, int revents)
1052	{
1053	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1054	evtimer_stop (w);
1055	evtimer_start (w);
1056	}
1057
1058	static void
1059	scb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1062	evio_stop (&wio);
1063	evio_start (&wio);
1064	}
1065
1066	static void
1067	gcb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "generic %x\n", revents);
1070
1071	}
1072
1073	int main (void)
1074	{
1075	ev_init (0);
1076
1077	evio_init (&wio, sin_cb, 0, EV_READ);
1078	evio_start (&wio);
1079
1080	struct ev_timer t[10000];
1081
1082	#if 0
1083	int i;
1084	for (i = 0; i < 10000; ++i)
1085	{
1086	struct ev_timer *w = t + i;
1087	evw_init (w, ocb, i);
1088	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1089	evtimer_start (w);
1090	if (drand48 () < 0.5)
1091	evtimer_stop (w);
1092	}
1093	#endif
1094
1095	struct ev_timer t1;
1096	evtimer_init (&t1, ocb, 5, 10);
1097	evtimer_start (&t1);
1098
1099	struct ev_signal sig;
1100	evsignal_init (&sig, scb, SIGQUIT);
1101	evsignal_start (&sig);
1102
1103	struct ev_check cw;
1104	evcheck_init (&cw, gcb);
1105	evcheck_start (&cw);
1106
1107	struct ev_idle iw;
1108	evidle_init (&iw, gcb);
1109	evidle_start (&iw);
1110
1111	ev_loop (0);
1112
1113	return 0;
1114	}
1115
1116	#endif
1117
1118
1119
1120

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Comparing libev/ev.c (file contents): Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs. Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC