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Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 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"
		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
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>	59	#include <unistd.h>
…		…
40	#include <stdio.h>	64	#include <stdio.h>
41		65
42	#include <assert.h>	66	#include <assert.h>
43	#include <errno.h>	67	#include <errno.h>
44	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
45	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
46	#include <sys/time.h>	72	#include <sys/time.h>
47	#include <time.h>	73	#include <time.h>
48		74
		75	/**/
		76
49	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	79	#endif
54		80
55	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
57	#endif	83	#endif
58		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
59	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
61	#endif	91	#endif
62		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
63	#ifndef EV_USE_REALTIME	105	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
65	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
66		122
67	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
68	#define MAX_BLOCKTIME 59.731	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
70		127
71	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
72		143
73	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
76		147
77	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80
81	static int have_monotonic; /* runtime */
82
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		149
87	/*****************************************************************************/	150	/*****************************************************************************/
88		151
89	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
90	ev_time (void)	186	ev_time (void)
91	{	187	{
92	#if EV_USE_REALTIME	188	#if EV_USE_REALTIME
93	struct timespec ts;	189	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	196	#endif
101	}	197	}
102		198
103	static ev_tstamp	199	inline ev_tstamp
104	get_clock (void)	200	get_clock (void)
105	{	201	{
106	#if EV_USE_MONOTONIC	202	#if EV_USE_MONOTONIC
107	if (have_monotonic)	203	if (expect_true (have_monotonic))
108	{	204	{
109	struct timespec ts;	205	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	208	}
113	#endif	209	#endif
114		210
115	return ev_time ();	211	return ev_time ();
116	}	212	}
117		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
118	#define array_nextsize(n) (((n) << 1) | 4 & ~3)	220	#define array_roundsize(base,n) ((n) | 4 & ~3)
119	#define array_prevsize(n) (((n) >> 1) | 4 & ~3)
120		221
121	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
122	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
123	{ \	224	{ \
124	int newcnt = cur; \	225	int newcnt = cur; \
125	do \	226	do \
126	{ \	227	{ \
127	newcnt = array_nextsize (newcnt); \	228	newcnt = array_roundsize (base, newcnt << 1); \
128	} \	229	} \
129	while ((cnt) > newcnt); \	230	while ((cnt) > newcnt); \
130	\	231	\
131	base = realloc (base, sizeof (*base) * (newcnt)); \	232	base = realloc (base, sizeof (*base) * (newcnt)); \
132	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
133	cur = newcnt; \	234	cur = newcnt; \
134	}	235	}
135		236
136	/*****************************************************************************/	237	/*****************************************************************************/
137		238
138	typedef struct
139	{
140	struct ev_io *head;
141	int events;
142	} ANFD;
143
144	static ANFD *anfds;
145	static int anfdmax;
146
147	static void	239	static void
148	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
149	{	241	{
150	while (count--)	242	while (count--)
151	{	243	{
152	base->head = 0;	244	base->head = 0;
153	base->events = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
154	++base;	248	++base;
155	}	249	}
156	}	250	}
157		251
158	typedef struct
159	{
160	W w;
161	int events;
162	} ANPENDING;
163
164	static ANPENDING *pendings;
165	static int pendingmax, pendingcnt;
166
167	static void	252	static void
168	event (W w, int events)	253	event (EV_P_ W w, int events)
169	{	254	{
170	if (w->active)	255	if (w->pending)
171	{	256	{
172	w->pending = ++pendingcnt;
173	array_needsize (pendings, pendingmax, pendingcnt, );
174	pendings [pendingcnt - 1].w = w;
175	pendings [pendingcnt - 1].events = events;	257	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		258	return;
176	}	259	}
177	}
178		260
		261	w->pending = ++pendingcnt [ABSPRI (w)];
		262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		263	pendings [ABSPRI (w)][w->pending - 1].w = w;
		264	pendings [ABSPRI (w)][w->pending - 1].events = events;
		265	}
		266
179	static void	267	static void
180	queue_events (W *events, int eventcnt, int type)	268	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	269	{
182	int i;	270	int i;
183		271
184	for (i = 0; i < eventcnt; ++i)	272	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	273	event (EV_A_ events [i], type);
186	}	274	}
187		275
188	static void	276	static void
189	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
190	{	278	{
191	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	280	struct ev_io *w;
193		281
194	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
195	{	283	{
196	int ev = w->events & events;	284	int ev = w->events & events;
197		285
198	if (ev)	286	if (ev)
199	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
200	}	288	}
201	}	289	}
202		290
203	/*****************************************************************************/	291	/*****************************************************************************/
204		292
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	293	static void
209	fd_reify (void)	294	fd_reify (EV_P)
210	{	295	{
211	int i;	296	int i;
212		297
213	for (i = 0; i < fdchangecnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
214	{	299	{
…		…
216	ANFD *anfd = anfds + fd;	301	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	302	struct ev_io *w;
218		303
219	int events = 0;	304	int events = 0;
220		305
221	for (w = anfd->head; w; w = w->next)	306	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
222	events |= w->events;	307	events |= w->events;
223		308
224	anfd->events &= ~EV_REIFY;	309	anfd->reify = 0;
225		310
226	if (anfd->events != events)
227	{
228	method_modify (fd, anfd->events, events);	311	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	312	anfd->events = events;
230	}
231	}	313	}
232		314
233	fdchangecnt = 0;	315	fdchangecnt = 0;
234	}	316	}
235		317
236	static void	318	static void
237	fd_change (int fd)	319	fd_change (EV_P_ int fd)
238	{	320	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	321	if (anfds [fd].reify || fdchangecnt < 0)
240	return;	322	return;
241		323
242	anfds [fd].events |= EV_REIFY;	324	anfds [fd].reify = 1;
243		325
244	++fdchangecnt;	326	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
246	fdchanges [fdchangecnt - 1] = fd;	328	fdchanges [fdchangecnt - 1] = fd;
247	}	329	}
248		330
		331	static void
		332	fd_kill (EV_P_ int fd)
		333	{
		334	struct ev_io *w;
		335
		336	while ((w = (struct ev_io *)anfds [fd].head))
		337	{
		338	ev_io_stop (EV_A_ w);
		339	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		340	}
		341	}
		342
249	/* called on EBADF to verify fds */	343	/* called on EBADF to verify fds */
250	static void	344	static void
251	fd_recheck (void)	345	fd_ebadf (EV_P)
252	{	346	{
253	int fd;	347	int fd;
254		348
255	for (fd = 0; fd < anfdmax; ++fd)	349	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	350	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
258	while (anfds [fd].head)	352	fd_kill (EV_A_ fd);
		353	}
		354
		355	/* called on ENOMEM in select/poll to kill some fds and retry */
		356	static void
		357	fd_enomem (EV_P)
		358	{
		359	int fd;
		360
		361	for (fd = anfdmax; fd--; )
		362	if (anfds [fd].events)
259	{	363	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	364	close (fd);
261	ev_io_stop (anfds [fd].head);	365	fd_kill (EV_A_ fd);
		366	return;
262	}	367	}
		368	}
		369
		370	/* susually called after fork if method needs to re-arm all fds from scratch */
		371	static void
		372	fd_rearm_all (EV_P)
		373	{
		374	int fd;
		375
		376	/* this should be highly optimised to not do anything but set a flag */
		377	for (fd = 0; fd < anfdmax; ++fd)
		378	if (anfds [fd].events)
		379	{
		380	anfds [fd].events = 0;
		381	fd_change (EV_A_ fd);
		382	}
263	}	383	}
264		384
265	/*****************************************************************************/	385	/*****************************************************************************/
266		386
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	387	static void
274	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
275	{	389	{
276	WT w = timers [k];	390	WT w = heap [k];
277		391
278	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
279	{	393	{
280	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
282	k >>= 1;	396	k >>= 1;
283	}	397	}
284		398
285	timers [k] = w;	399	heap [k] = w;
286	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
287		401
288	}	402	}
289		403
290	static void	404	static void
291	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
292	{	406	{
293	WT w = timers [k];	407	WT w = heap [k];
294		408
295	while (k < (N >> 1))	409	while (k < (N >> 1))
296	{	410	{
297	int j = k << 1;	411	int j = k << 1;
298		412
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	414	++j;
301		415
302	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
303	break;	417	break;
304		418
305	timers [k] = timers [j];	419	heap [k] = heap [j];
306	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
307	k = j;	421	k = j;
308	}	422	}
309		423
310	timers [k] = w;	424	heap [k] = w;
311	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
312	}	426	}
313		427
314	/*****************************************************************************/	428	/*****************************************************************************/
315		429
316	typedef struct	430	typedef struct
317	{	431	{
318	struct ev_signal *head;	432	struct ev_watcher_list *head;
319	sig_atomic_t gotsig;	433	sig_atomic_t volatile gotsig;
320	} ANSIG;	434	} ANSIG;
321		435
322	static ANSIG *signals;	436	static ANSIG *signals;
323	static int signalmax;	437	static int signalmax;
324		438
325	static int sigpipe [2];	439	static int sigpipe [2];
326	static sig_atomic_t gotsig;	440	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	441	static struct ev_io sigev;
328		442
329	static void	443	static void
330	signals_init (ANSIG *base, int count)	444	signals_init (ANSIG *base, int count)
331	{	445	{
332	while (count--)	446	while (count--)
333	{	447	{
334	base->head = 0;	448	base->head = 0;
335	base->gotsig = 0;	449	base->gotsig = 0;
		450
336	++base;	451	++base;
337	}	452	}
338	}	453	}
339		454
340	static void	455	static void
…		…
342	{	457	{
343	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
344		459
345	if (!gotsig)	460	if (!gotsig)
346	{	461	{
		462	int old_errno = errno;
347	gotsig = 1;	463	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
349	}	466	}
350	}	467	}
351		468
352	static void	469	static void
353	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	471	{
355	struct ev_signal *w;	472	struct ev_watcher_list *w;
356	int sig;	473	int signum;
357		474
		475	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	476	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		477
361	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
363	{	480	{
364	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
365		482
366	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
368	}	485	}
369	}	486	}
370		487
371	static void	488	static void
372	siginit (void)	489	siginit (EV_P)
373	{	490	{
		491	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		494
377	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
380		499
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	503	}
384		504
385	/*****************************************************************************/	505	/*****************************************************************************/
386		506
387	static struct ev_idle **idles;	507	#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		508
398	static struct ev_child *childs [PID_HASHSIZE];	509	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;	510	static struct ev_signal childev;
400		511
401	#ifndef WCONTINUED	512	#ifndef WCONTINUED
402	# define WCONTINUED 0	513	# define WCONTINUED 0
403	#endif	514	#endif
404		515
405	static void	516	static void
406	childcb (struct ev_signal *sw, int revents)	517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	518	{
408	struct ev_child *w;	519	struct ev_child *w;
		520
		521	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		522	if (w->pid == pid || !w->pid)
		523	{
		524	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
409	int pid, status;	534	int pid, status;
410		535
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	536	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	537	{
413	if (w->pid == pid || w->pid == -1)	538	/* make sure we are called again until all childs have been reaped */
414	{	539	event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	540
416	event ((W)w, EV_CHILD);	541	child_reap (EV_A_ sw, pid, pid, status);
417	}	542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
418	}	544	}
		545
		546	#endif
419		547
420	/*****************************************************************************/	548	/*****************************************************************************/
421		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
422	#if EV_USE_EPOLL	553	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	554	# include "ev_epoll.c"
424	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
425	#if EV_USE_SELECT	559	#if EV_USE_SELECT
426	# include "ev_select.c"	560	# include "ev_select.c"
427	#endif	561	#endif
428		562
429	int	563	int
…		…
436	ev_version_minor (void)	570	ev_version_minor (void)
437	{	571	{
438	return EV_VERSION_MINOR;	572	return EV_VERSION_MINOR;
439	}	573	}
440		574
441	int ev_init (int flags)	575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
442	{	578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	|| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	static void
		594	loop_init (EV_P_ int methods)
		595	{
443	if (!ev_method)	596	if (!method)
444	{	597	{
445	#if EV_USE_MONOTONIC	598	#if EV_USE_MONOTONIC
446	{	599	{
447	struct timespec ts;	600	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	602	have_monotonic = 1;
450	}	603	}
451	#endif	604	#endif
452		605
453	ev_now = ev_time ();	606	rt_now = ev_time ();
454	now = get_clock ();	607	mn_now = get_clock ();
		608	now_floor = mn_now;
455	diff = ev_now - now;	609	rtmn_diff = rt_now - mn_now;
456		610
457	if (pipe (sigpipe))	611	if (methods == EVMETHOD_AUTO)
458	return 0;	612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
460	ev_method = EVMETHOD_NONE;	615	methods = EVMETHOD_ANY;
		616
		617	method = 0;
		618	#if EV_USE_WIN32
		619	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		620	#endif
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
461	#if EV_USE_EPOLL	624	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
463	#endif	629	#endif
464	#if EV_USE_SELECT	630	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	632	#endif
		633	}
		634	}
467		635
		636	void
		637	loop_destroy (EV_P)
		638	{
		639	#if EV_USE_WIN32
		640	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		647	#endif
		648	#if EV_USE_POLL
		649	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		653	#endif
		654
		655	method = 0;
		656	/*TODO*/
		657	}
		658
		659	void
		660	loop_fork (EV_P)
		661	{
		662	/*TODO*/
		663	#if EV_USE_EPOLL
		664	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		665	#endif
		666	#if EV_USE_KQUEUE
		667	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		668	#endif
		669	}
		670
		671	#if EV_MULTIPLICITY
		672	struct ev_loop *
		673	ev_loop_new (int methods)
		674	{
		675	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		676
		677	loop_init (EV_A_ methods);
		678
		679	if (ev_method (EV_A))
		680	return loop;
		681
		682	return 0;
		683	}
		684
		685	void
		686	ev_loop_destroy (EV_P)
		687	{
		688	loop_destroy (EV_A);
		689	free (loop);
		690	}
		691
		692	void
		693	ev_loop_fork (EV_P)
		694	{
		695	loop_fork (EV_A);
		696	}
		697
		698	#endif
		699
		700	#if EV_MULTIPLICITY
		701	struct ev_loop default_loop_struct;
		702	static struct ev_loop *default_loop;
		703
		704	struct ev_loop *
		705	#else
		706	static int default_loop;
		707
		708	int
		709	#endif
		710	ev_default_loop (int methods)
		711	{
		712	if (sigpipe [0] == sigpipe [1])
		713	if (pipe (sigpipe))
		714	return 0;
		715
		716	if (!default_loop)
		717	{
		718	#if EV_MULTIPLICITY
		719	struct ev_loop *loop = default_loop = &default_loop_struct;
		720	#else
		721	default_loop = 1;
		722	#endif
		723
		724	loop_init (EV_A_ methods);
		725
468	if (ev_method)	726	if (ev_method (EV_A))
469	{	727	{
470	ev_watcher_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
471	siginit ();	730	siginit (EV_A);
472		731
		732	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	733	ev_signal_init (&childev, childcb, SIGCHLD);
		734	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	735	ev_signal_start (EV_A_ &childev);
		736	ev_unref (EV_A); /* child watcher should not keep loop alive */
		737	#endif
475	}	738	}
		739	else
		740	default_loop = 0;
476	}	741	}
477		742
478	return ev_method;	743	return default_loop;
479	}	744	}
480		745
481	/*****************************************************************************/
482
483	void	746	void
484	ev_prefork (void)	747	ev_default_destroy (void)
485	{	748	{
486	/* nop */	749	#if EV_MULTIPLICITY
487	}	750	struct ev_loop *loop = default_loop;
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif	751	#endif
502		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
503	ev_io_stop (&sigev);	757	ev_io_stop (EV_A_ &sigev);
		758
		759	close (sigpipe [0]); sigpipe [0] = 0;
		760	close (sigpipe [1]); sigpipe [1] = 0;
		761
		762	loop_destroy (EV_A);
		763	}
		764
		765	void
		766	ev_default_fork (void)
		767	{
		768	#if EV_MULTIPLICITY
		769	struct ev_loop *loop = default_loop;
		770	#endif
		771
		772	loop_fork (EV_A);
		773
		774	ev_io_stop (EV_A_ &sigev);
504	close (sigpipe [0]);	775	close (sigpipe [0]);
505	close (sigpipe [1]);	776	close (sigpipe [1]);
506	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
507	siginit ();	780	siginit (EV_A);
508	}	781	}
509		782
510	/*****************************************************************************/	783	/*****************************************************************************/
511		784
512	static void	785	static void
513	call_pending (void)	786	call_pending (EV_P)
514	{	787	{
		788	int pri;
		789
		790	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	791	while (pendingcnt [pri])
516	{	792	{
517	ANPENDING *p = pendings + --pendingcnt;	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		794
519	if (p->w)	795	if (p->w)
520	{	796	{
521	p->w->pending = 0;	797	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	798
		799	(*(void (**)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
523	}	800	}
524	}	801	}
525	}	802	}
526		803
527	static void	804	static void
528	timers_reify (void)	805	timers_reify (EV_P)
529	{	806	{
530	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	808	{
532	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
533		810
534	event ((W)w, EV_TIMEOUT);	811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
535		812
536	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
537	if (w->repeat)	814	if (w->repeat)
538	{	815	{
		816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
539	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
540	assert (("timer timeout in the past, negative repeat?", w->at > now));
541	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
542	}	819	}
543	else	820	else
544	ev_timer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545	}
546	}
547		822
		823	event (EV_A_ (W)w, EV_TIMEOUT);
		824	}
		825	}
		826
548	static void	827	static void
549	periodics_reify (void)	828	periodics_reify (EV_P)
550	{	829	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
552	{	831	{
553	struct ev_periodic *w = periodics [0];	832	struct ev_periodic *w = periodics [0];
		833
		834	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
554		835
555	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
556	if (w->interval)	837	if (w->interval)
557	{	838	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	839	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	840	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
561	}	842	}
562	else	843	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		845
565	event ((W)w, EV_TIMEOUT);	846	event (EV_A_ (W)w, EV_PERIODIC);
566	}	847	}
567	}	848	}
568		849
569	static void	850	static void
570	periodics_reschedule (ev_tstamp diff)	851	periodics_reschedule (EV_P)
571	{	852	{
572	int i;	853	int i;
573		854
574	/* adjust periodics after time jump */	855	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
576	{	857	{
577	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
578		859
579	if (w->interval)	860	if (w->interval)
580	{	861	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	862	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
582		863
583	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
584	{	865	{
585	ev_periodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
586	ev_periodic_start (w);	867	ev_periodic_start (EV_A_ w);
587		868
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	870	}
590	}	871	}
591	}	872	}
592	}	873	}
593		874
		875	inline int
		876	time_update_monotonic (EV_P)
		877	{
		878	mn_now = get_clock ();
		879
		880	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		881	{
		882	rt_now = rtmn_diff + mn_now;
		883	return 0;
		884	}
		885	else
		886	{
		887	now_floor = mn_now;
		888	rt_now = ev_time ();
		889	return 1;
		890	}
		891	}
		892
594	static void	893	static void
595	time_update (void)	894	time_update (EV_P)
596	{	895	{
597	int i;	896	int i;
598		897
599	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	899	if (expect_true (have_monotonic))
602	{	900	{
603	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	902	{
607	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
608	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
609		908
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	910	return; /* all is well */
612		911
613	ev_now = ev_time ();	912	rt_now = ev_time ();
		913	mn_now = get_clock ();
		914	now_floor = mn_now;
		915	}
		916
		917	periodics_reschedule (EV_A);
		918	/* no timer adjustment, as the monotonic clock doesn't jump */
		919	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
614	}	920	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}	921	}
619	else	922	else
		923	#endif
620	{	924	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	925	rt_now = ev_time ();
		926
		927	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
622	{	928	{
623	periodics_reschedule (ev_now - now);	929	periodics_reschedule (EV_A);
624		930
625	/* adjust timers. this is easy, as the offset is the same for all */	931	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	933	((WT)timers [i])->at += rt_now - mn_now;
628	}	934	}
629		935
630	now = ev_now;	936	mn_now = rt_now;
631	}	937	}
632	}	938	}
633		939
634	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
635		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
636	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
637	{	956	{
638	double block;	957	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	958	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640		959
641	do	960	do
642	{	961	{
643	/* queue check watchers (and execute them) */	962	/* queue check watchers (and execute them) */
644	if (preparecnt)	963	if (expect_false (preparecnt))
645	{	964	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	966	call_pending (EV_A);
648	}	967	}
649		968
650	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
651	fd_reify ();	970	fd_reify (EV_A);
652		971
653	/* calculate blocking time */	972	/* calculate blocking time */
654		973
655	/* we only need this for !monotonic clockor timers, but as we basically	974	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */	975	always have timers, we just calculate it always */
		976	#if EV_USE_MONOTONIC
		977	if (expect_true (have_monotonic))
		978	time_update_monotonic (EV_A);
		979	else
		980	#endif
		981	{
657	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
658		985
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	986	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	987	block = 0.;
661	else	988	else
662	{	989	{
663	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
664		991
665	if (timercnt)	992	if (timercnt)
666	{	993	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	994	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
668	if (block > to) block = to;	995	if (block > to) block = to;
669	}	996	}
670		997
671	if (periodiccnt)	998	if (periodiccnt)
672	{	999	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
674	if (block > to) block = to;	1001	if (block > to) block = to;
675	}	1002	}
676		1003
677	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
678	}	1005	}
679		1006
680	method_poll (block);	1007	method_poll (EV_A_ block);
681		1008
682	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
683	time_update ();	1010	time_update (EV_A);
684		1011
685	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1013	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	1014	periodics_reify (EV_A); /* absolute timers called first */
688		1015
689	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	1017	if (!pendingcnt)
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1019
693	/* queue check watchers, to be executed first */	1020	/* queue check watchers, to be executed first */
694	if (checkcnt)	1021	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1023
697	call_pending ();	1024	call_pending (EV_A);
698	}	1025	}
699	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
700		1027
701	if (ev_loop_done != 2)	1028	if (loop_done != 2)
702	ev_loop_done = 0;	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
703	}	1036	}
704		1037
705	/*****************************************************************************/	1038	/*****************************************************************************/
706		1039
707	static void	1040	inline void
708	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
709	{	1042	{
710	elem->next = *head;	1043	elem->next = *head;
711	*head = elem;	1044	*head = elem;
712	}	1045	}
713		1046
714	static void	1047	inline void
715	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
716	{	1049	{
717	while (*head)	1050	while (*head)
718	{	1051	{
719	if (*head == elem)	1052	if (*head == elem)
…		…
724		1057
725	head = &(*head)->next;	1058	head = &(*head)->next;
726	}	1059	}
727	}	1060	}
728		1061
729	static void	1062	inline void
730	ev_clear (W w)	1063	ev_clear_pending (EV_P_ W w)
731	{	1064	{
732	if (w->pending)	1065	if (w->pending)
733	{	1066	{
734	pendings [w->pending - 1].w = 0;	1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1068	w->pending = 0;
736	}	1069	}
737	}	1070	}
738		1071
739	static void	1072	inline void
740	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
741	{	1074	{
		1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
742	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
743	}	1080	}
744		1081
745	static void	1082	inline void
746	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
747	{	1084	{
		1085	ev_unref (EV_A);
748	w->active = 0;	1086	w->active = 0;
749	}	1087	}
750		1088
751	/*****************************************************************************/	1089	/*****************************************************************************/
752		1090
753	void	1091	void
754	ev_io_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
755	{	1093	{
		1094	int fd = w->fd;
		1095
756	if (ev_is_active (w))	1096	if (ev_is_active (w))
757	return;	1097	return;
758		1098
759	int fd = w->fd;	1099	assert (("ev_io_start called with negative fd", fd >= 0));
760		1100
761	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1104
765	fd_change (fd);	1105	fd_change (EV_A_ fd);
766	}	1106	}
767		1107
768	void	1108	void
769	ev_io_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1110	{
771	ev_clear ((W)w);	1111	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
773	return;	1113	return;
774		1114
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
777		1117
778	fd_change (w->fd);	1118	fd_change (EV_A_ w->fd);
779	}	1119	}
780		1120
781	void	1121	void
782	ev_timer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1123	{
784	if (ev_is_active (w))	1124	if (ev_is_active (w))
785	return;	1125	return;
786		1126
787	w->at += now;	1127	((WT)w)->at += mn_now;
788		1128
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1129	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1130
791	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
793	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
795	}
796		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
797	void	1139	void
798	ev_timer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1141	{
800	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
802	return;	1144	return;
803		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
804	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
805	{	1149	{
806	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
808	}	1152	}
809		1153
810	w->at = w->repeat;	1154	((WT)w)->at = w->repeat;
811		1155
812	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
813	}	1157	}
814		1158
815	void	1159	void
816	ev_timer_again (struct ev_timer *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1161	{
818	if (ev_is_active (w))	1162	if (ev_is_active (w))
819	{	1163	{
820	if (w->repeat)	1164	if (w->repeat)
821	{	1165	{
822	w->at = now + w->repeat;	1166	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
824	}	1168	}
825	else	1169	else
826	ev_timer_stop (w);	1170	ev_timer_stop (EV_A_ w);
827	}	1171	}
828	else if (w->repeat)	1172	else if (w->repeat)
829	ev_timer_start (w);	1173	ev_timer_start (EV_A_ w);
830	}	1174	}
831		1175
832	void	1176	void
833	ev_periodic_start (struct ev_periodic *w)	1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1178	{
835	if (ev_is_active (w))	1179	if (ev_is_active (w))
836	return;	1180	return;
837		1181
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1182	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
839		1183
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1184	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)	1185	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1186	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
843		1187
844	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
846	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
850	void	1196	void
851	ev_periodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1198	{
853	ev_clear ((W)w);	1199	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
855	return;	1201	return;
856		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
857	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
858	{	1206	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
861	}	1209	}
862		1210
863	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
864	}	1212	}
865		1213
866	void	1214	void
867	ev_signal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1216	{
869	if (ev_is_active (w))	1217	if (ev_is_active (w))
870	return;	1218	return;
871		1219
		1220	ev_start (EV_A_ (W)w, ++idlecnt);
		1221	array_needsize (idles, idlemax, idlecnt, );
		1222	idles [idlecnt - 1] = w;
		1223	}
		1224
		1225	void
		1226	ev_idle_stop (EV_P_ struct ev_idle *w)
		1227	{
		1228	ev_clear_pending (EV_A_ (W)w);
		1229	if (ev_is_active (w))
		1230	return;
		1231
		1232	idles [((W)w)->active - 1] = idles [--idlecnt];
		1233	ev_stop (EV_A_ (W)w);
		1234	}
		1235
		1236	void
		1237	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1238	{
		1239	if (ev_is_active (w))
		1240	return;
		1241
		1242	ev_start (EV_A_ (W)w, ++preparecnt);
		1243	array_needsize (prepares, preparemax, preparecnt, );
		1244	prepares [preparecnt - 1] = w;
		1245	}
		1246
		1247	void
		1248	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1249	{
		1250	ev_clear_pending (EV_A_ (W)w);
		1251	if (ev_is_active (w))
		1252	return;
		1253
		1254	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1255	ev_stop (EV_A_ (W)w);
		1256	}
		1257
		1258	void
		1259	ev_check_start (EV_P_ struct ev_check *w)
		1260	{
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	ev_start (EV_A_ (W)w, ++checkcnt);
		1265	array_needsize (checks, checkmax, checkcnt, );
		1266	checks [checkcnt - 1] = w;
		1267	}
		1268
		1269	void
		1270	ev_check_stop (EV_P_ struct ev_check *w)
		1271	{
		1272	ev_clear_pending (EV_A_ (W)w);
		1273	if (ev_is_active (w))
		1274	return;
		1275
		1276	checks [((W)w)->active - 1] = checks [--checkcnt];
		1277	ev_stop (EV_A_ (W)w);
		1278	}
		1279
		1280	#ifndef SA_RESTART
		1281	# define SA_RESTART 0
		1282	#endif
		1283
		1284	void
		1285	ev_signal_start (EV_P_ struct ev_signal *w)
		1286	{
		1287	#if EV_MULTIPLICITY
		1288	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1289	#endif
		1290	if (ev_is_active (w))
		1291	return;
		1292
		1293	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1294
872	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1298
876	if (!w->next)	1299	if (!((WL)w)->next)
877	{	1300	{
878	struct sigaction sa;	1301	struct sigaction sa;
879	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
883	}	1306	}
884	}	1307	}
885		1308
886	void	1309	void
887	ev_signal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1311	{
889	ev_clear ((W)w);	1312	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
891	return;	1314	return;
892		1315
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
895		1318
896	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
898	}	1321	}
899		1322
900	void	1323	void
901	ev_idle_start (struct ev_idle *w)	1324	ev_child_start (EV_P_ struct ev_child *w)
902	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
903	if (ev_is_active (w))	1329	if (ev_is_active (w))
904	return;	1330	return;
905		1331
906	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1334	}
910		1335
911	void	1336	void
912	ev_idle_stop (struct ev_idle *w)	1337	ev_child_stop (EV_P_ struct ev_child *w)
913	{	1338	{
914	ev_clear ((W)w);	1339	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1340	if (ev_is_active (w))
916	return;	1341	return;
917		1342
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)
968	{
969	if (ev_is_active (w))
970	return;
971
972	ev_start ((W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}
975
976	void
977	ev_child_stop (struct ev_child *w)
978	{
979	ev_clear ((W)w);
980	if (ev_is_active (w))
981	return;
982
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1344	ev_stop (EV_A_ (W)w);
985	}	1345	}
986		1346
987	/*****************************************************************************/	1347	/*****************************************************************************/
988		1348
989	struct ev_once	1349	struct ev_once
…		…
993	void (*cb)(int revents, void *arg);	1353	void (*cb)(int revents, void *arg);
994	void *arg;	1354	void *arg;
995	};	1355	};
996		1356
997	static void	1357	static void
998	once_cb (struct ev_once *once, int revents)	1358	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1359	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1360	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1361	void *arg = once->arg;
1002		1362
1003	ev_io_stop (&once->io);	1363	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1364	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1365	free (once);
1006		1366
1007	cb (revents, arg);	1367	cb (revents, arg);
1008	}	1368	}
1009		1369
1010	static void	1370	static void
1011	once_cb_io (struct ev_io *w, int revents)	1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1372	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1373	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1374	}
1015		1375
1016	static void	1376	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1378	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1379	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1380	}
1021		1381
1022	void	1382	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1383	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1384	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1385	struct ev_once *once = malloc (sizeof (struct ev_once));
1026		1386
1027	if (!once)	1387	if (!once)
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1388	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1033		1393
1034	ev_watcher_init (&once->io, once_cb_io);	1394	ev_watcher_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1395	if (fd >= 0)
1036	{	1396	{
1037	ev_io_set (&once->io, fd, events);	1397	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1398	ev_io_start (EV_A_ &once->io);
1039	}	1399	}
1040		1400
1041	ev_watcher_init (&once->to, once_cb_to);	1401	ev_watcher_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1402	if (timeout >= 0.)
1043	{	1403	{
1044	ev_timer_set (&once->to, timeout, 0.);	1404	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1405	ev_timer_start (EV_A_ &once->to);
1046	}	1406	}
1047	}	1407	}
1048	}	1408	}
1049		1409
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}
1127
1128	#endif
1129
1130
1131
1132

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