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Comparing libev/ev.c (file contents):
Revision 1.32 by root, Thu Nov 1 09:21:51 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
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
63	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
65	#endif	119	#endif
66	#ifndef EV_USE_REALTIME	120
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
68	#endif
69		122
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		127
75	#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)
76		143
77	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
80		147
81	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84
85	static int have_monotonic; /* runtime */
86
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		149
91	/*****************************************************************************/	150	/*****************************************************************************/
92		151
93	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
94	ev_time (void)	186	ev_time (void)
95	{	187	{
96	#if EV_USE_REALTIME	188	#if EV_USE_REALTIME
97	struct timespec ts;	189	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	196	#endif
105	}	197	}
106		198
107	static ev_tstamp	199	inline ev_tstamp
108	get_clock (void)	200	get_clock (void)
109	{	201	{
110	#if EV_USE_MONOTONIC	202	#if EV_USE_MONOTONIC
111	if (have_monotonic)	203	if (expect_true (have_monotonic))
112	{	204	{
113	struct timespec ts;	205	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	208	}
117	#endif	209	#endif
118		210
119	return ev_time ();	211	return ev_time ();
120	}	212	}
121		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	220	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		221
124	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
126	{ \	224	{ \
127	int newcnt = cur; \	225	int newcnt = cur; \
128	do \	226	do \
129	{ \	227	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	228	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	234	cur = newcnt; \
137	}	235	}
138		236
139	/*****************************************************************************/	237	/*****************************************************************************/
140		238
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149
150	static void	239	static void
151	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
152	{	241	{
153	while (count--)	242	while (count--)
154	{	243	{
155	base->head = 0;	244	base->head = 0;
156	base->events = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
157	++base;	248	++base;
158	}	249	}
159	}	250	}
160		251
161	typedef struct
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void	252	static void
171	event (W w, int events)	253	event (EV_P_ W w, int events)
172	{	254	{
173	if (w->pending)	255	if (w->pending)
174	{	256	{
175	pendings [w->pending - 1].events |= events;	257	pendings [ABSPRI (w)][w->pending - 1].events |= events;
176	return;	258	return;
177	}	259	}
178		260
179	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
180	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
181	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
182	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
183	}	265	}
184		266
185	static void	267	static void
186	queue_events (W *events, int eventcnt, int type)	268	queue_events (EV_P_ W *events, int eventcnt, int type)
187	{	269	{
188	int i;	270	int i;
189		271
190	for (i = 0; i < eventcnt; ++i)	272	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);	273	event (EV_A_ events [i], type);
192	}	274	}
193		275
194	static void	276	static void
195	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
196	{	278	{
197	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
198	struct ev_io *w;	280	struct ev_io *w;
199		281
200	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
201	{	283	{
202	int ev = w->events & events;	284	int ev = w->events & events;
203		285
204	if (ev)	286	if (ev)
205	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
206	}	288	}
207	}	289	}
208		290
209	/*****************************************************************************/	291	/*****************************************************************************/
210		292
211	static int *fdchanges;
212	static int fdchangemax, fdchangecnt;
213
214	static void	293	static void
215	fd_reify (void)	294	fd_reify (EV_P)
216	{	295	{
217	int i;	296	int i;
218		297
219	for (i = 0; i < fdchangecnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
220	{	299	{
…		…
222	ANFD *anfd = anfds + fd;	301	ANFD *anfd = anfds + fd;
223	struct ev_io *w;	302	struct ev_io *w;
224		303
225	int events = 0;	304	int events = 0;
226		305
227	for (w = anfd->head; w; w = w->next)	306	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
228	events |= w->events;	307	events |= w->events;
229		308
230	anfd->events &= ~EV_REIFY;	309	anfd->reify = 0;
231		310
232	if (anfd->events != events)
233	{
234	method_modify (fd, anfd->events, events);	311	method_modify (EV_A_ fd, anfd->events, events);
235	anfd->events = events;	312	anfd->events = events;
236	}
237	}	313	}
238		314
239	fdchangecnt = 0;	315	fdchangecnt = 0;
240	}	316	}
241		317
242	static void	318	static void
243	fd_change (int fd)	319	fd_change (EV_P_ int fd)
244	{	320	{
245	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	321	if (anfds [fd].reify || fdchangecnt < 0)
246	return;	322	return;
247		323
248	anfds [fd].events |= EV_REIFY;	324	anfds [fd].reify = 1;
249		325
250	++fdchangecnt;	326	++fdchangecnt;
251	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
252	fdchanges [fdchangecnt - 1] = fd;	328	fdchanges [fdchangecnt - 1] = fd;
253	}	329	}
254		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
255	/* called on EBADF to verify fds */	343	/* called on EBADF to verify fds */
256	static void	344	static void
257	fd_recheck (void)	345	fd_ebadf (EV_P)
258	{	346	{
259	int fd;	347	int fd;
260		348
261	for (fd = 0; fd < anfdmax; ++fd)	349	for (fd = 0; fd < anfdmax; ++fd)
262	if (anfds [fd].events)	350	if (anfds [fd].events)
263	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
264	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)
265	{	363	{
266	ev_io_stop (anfds [fd].head);	364	close (fd);
267	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	365	fd_kill (EV_A_ fd);
		366	return;
268	}	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	}
269	}	383	}
270		384
271	/*****************************************************************************/	385	/*****************************************************************************/
272		386
273	static struct ev_timer **timers;
274	static int timermax, timercnt;
275
276	static struct ev_periodic **periodics;
277	static int periodicmax, periodiccnt;
278
279	static void	387	static void
280	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
281	{	389	{
282	WT w = timers [k];	390	WT w = heap [k];
283		391
284	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
285	{	393	{
286	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
287	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
288	k >>= 1;	396	k >>= 1;
289	}	397	}
290		398
291	timers [k] = w;	399	heap [k] = w;
292	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
293		401
294	}	402	}
295		403
296	static void	404	static void
297	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
298	{	406	{
299	WT w = timers [k];	407	WT w = heap [k];
300		408
301	while (k < (N >> 1))	409	while (k < (N >> 1))
302	{	410	{
303	int j = k << 1;	411	int j = k << 1;
304		412
305	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
306	++j;	414	++j;
307		415
308	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
309	break;	417	break;
310		418
311	timers [k] = timers [j];	419	heap [k] = heap [j];
312	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
313	k = j;	421	k = j;
314	}	422	}
315		423
316	timers [k] = w;	424	heap [k] = w;
317	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
318	}	426	}
319		427
320	/*****************************************************************************/	428	/*****************************************************************************/
321		429
322	typedef struct	430	typedef struct
323	{	431	{
324	struct ev_signal *head;	432	struct ev_watcher_list *head;
325	sig_atomic_t gotsig;	433	sig_atomic_t volatile gotsig;
326	} ANSIG;	434	} ANSIG;
327		435
328	static ANSIG *signals;	436	static ANSIG *signals;
329	static int signalmax;	437	static int signalmax;
330		438
331	static int sigpipe [2];	439	static int sigpipe [2];
332	static sig_atomic_t gotsig;	440	static sig_atomic_t volatile gotsig;
333	static struct ev_io sigev;	441	static struct ev_io sigev;
334		442
335	static void	443	static void
336	signals_init (ANSIG *base, int count)	444	signals_init (ANSIG *base, int count)
337	{	445	{
338	while (count--)	446	while (count--)
339	{	447	{
340	base->head = 0;	448	base->head = 0;
341	base->gotsig = 0;	449	base->gotsig = 0;
		450
342	++base;	451	++base;
343	}	452	}
344	}	453	}
345		454
346	static void	455	static void
…		…
348	{	457	{
349	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
350		459
351	if (!gotsig)	460	if (!gotsig)
352	{	461	{
		462	int old_errno = errno;
353	gotsig = 1;	463	gotsig = 1;
354	write (sigpipe [1], &gotsig, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
355	}	466	}
356	}	467	}
357		468
358	static void	469	static void
359	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
360	{	471	{
361	struct ev_signal *w;	472	struct ev_watcher_list *w;
362	int sig;	473	int signum;
363		474
		475	read (sigpipe [0], &revents, 1);
364	gotsig = 0;	476	gotsig = 0;
365	read (sigpipe [0], &revents, 1);
366		477
367	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
368	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
369	{	480	{
370	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
371		482
372	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
373	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
374	}	485	}
375	}	486	}
376		487
377	static void	488	static void
378	siginit (void)	489	siginit (EV_P)
379	{	490	{
		491	#ifndef WIN32
380	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
381	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
382		494
383	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
384	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
385	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
386		499
387	ev_io_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
388	ev_io_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
389	}	503	}
390		504
391	/*****************************************************************************/	505	/*****************************************************************************/
392		506
393	static struct ev_idle **idles;	507	#ifndef WIN32
394	static int idlemax, idlecnt;
395
396	static struct ev_prepare **prepares;
397	static int preparemax, preparecnt;
398
399	static struct ev_check **checks;
400	static int checkmax, checkcnt;
401
402	/*****************************************************************************/
403		508
404	static struct ev_child *childs [PID_HASHSIZE];	509	static struct ev_child *childs [PID_HASHSIZE];
405	static struct ev_signal childev;	510	static struct ev_signal childev;
406		511
407	#ifndef WCONTINUED	512	#ifndef WCONTINUED
408	# define WCONTINUED 0	513	# define WCONTINUED 0
409	#endif	514	#endif
410		515
411	static void	516	static void
412	childcb (struct ev_signal *sw, int revents)	517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
413	{	518	{
414	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	{
415	int pid, status;	534	int pid, status;
416		535
417	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	536	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
418	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	537	{
419	if (w->pid == pid || w->pid == -1)	538	/* make sure we are called again until all childs have been reaped */
420	{	539	event (EV_A_ (W)sw, EV_SIGNAL);
421	w->status = status;	540
422	event ((W)w, EV_CHILD);	541	child_reap (EV_A_ sw, pid, pid, status);
423	}	542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
424	}	544	}
		545
		546	#endif
425		547
426	/*****************************************************************************/	548	/*****************************************************************************/
427		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
428	#if EV_USE_EPOLL	553	#if EV_USE_EPOLL
429	# include "ev_epoll.c"	554	# include "ev_epoll.c"
430	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
431	#if EV_USE_SELECT	559	#if EV_USE_SELECT
432	# include "ev_select.c"	560	# include "ev_select.c"
433	#endif	561	#endif
434		562
435	int	563	int
…		…
442	ev_version_minor (void)	570	ev_version_minor (void)
443	{	571	{
444	return EV_VERSION_MINOR;	572	return EV_VERSION_MINOR;
445	}	573	}
446		574
447	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)
448	{	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	{
449	if (!ev_method)	596	if (!method)
450	{	597	{
451	#if EV_USE_MONOTONIC	598	#if EV_USE_MONOTONIC
452	{	599	{
453	struct timespec ts;	600	struct timespec ts;
454	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
455	have_monotonic = 1;	602	have_monotonic = 1;
456	}	603	}
457	#endif	604	#endif
458		605
459	ev_now = ev_time ();	606	rt_now = ev_time ();
460	now = get_clock ();	607	mn_now = get_clock ();
		608	now_floor = mn_now;
461	diff = ev_now - now;	609	rtmn_diff = rt_now - mn_now;
462		610
463	if (pipe (sigpipe))	611	if (methods == EVMETHOD_AUTO)
464	return 0;	612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
465		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
466	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
467	#if EV_USE_EPOLL	624	#if EV_USE_EPOLL
468	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);
469	#endif	629	#endif
470	#if EV_USE_SELECT	630	#if EV_USE_SELECT
471	if (ev_method == EVMETHOD_NONE) select_init (flags);	631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
472	#endif	632	#endif
		633	}
		634	}
473		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
474	if (ev_method)	726	if (ev_method (EV_A))
475	{	727	{
476	ev_watcher_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
477	siginit ();	730	siginit (EV_A);
478		731
		732	#ifndef WIN32
479	ev_signal_init (&childev, childcb, SIGCHLD);	733	ev_signal_init (&childev, childcb, SIGCHLD);
		734	ev_set_priority (&childev, EV_MAXPRI);
480	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
481	}	738	}
		739	else
		740	default_loop = 0;
482	}	741	}
483		742
484	return ev_method;	743	return default_loop;
485	}	744	}
486		745
487	/*****************************************************************************/
488
489	void	746	void
490	ev_prefork (void)	747	ev_default_destroy (void)
491	{	748	{
492	/* nop */	749	#if EV_MULTIPLICITY
493	}	750	struct ev_loop *loop = default_loop;
494
495	void
496	ev_postfork_parent (void)
497	{
498	/* nop */
499	}
500
501	void
502	ev_postfork_child (void)
503	{
504	#if EV_USE_EPOLL
505	if (ev_method == EVMETHOD_EPOLL)
506	epoll_postfork_child ();
507	#endif	751	#endif
508		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
509	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);
510	close (sigpipe [0]);	775	close (sigpipe [0]);
511	close (sigpipe [1]);	776	close (sigpipe [1]);
512	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
513	siginit ();	780	siginit (EV_A);
514	}	781	}
515		782
516	/*****************************************************************************/	783	/*****************************************************************************/
517		784
518	static void	785	static void
519	call_pending (void)	786	call_pending (EV_P)
520	{	787	{
		788	int pri;
		789
		790	for (pri = NUMPRI; pri--; )
521	while (pendingcnt)	791	while (pendingcnt [pri])
522	{	792	{
523	ANPENDING *p = pendings + --pendingcnt;	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
524		794
525	if (p->w)	795	if (p->w)
526	{	796	{
527	p->w->pending = 0;	797	p->w->pending = 0;
528	p->w->cb (p->w, p->events);	798
		799	(*(void (**)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
529	}	800	}
530	}	801	}
531	}	802	}
532		803
533	static void	804	static void
534	timers_reify (void)	805	timers_reify (EV_P)
535	{	806	{
536	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
537	{	808	{
538	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
		810
		811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
539		812
540	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
541	if (w->repeat)	814	if (w->repeat)
542	{	815	{
		816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
543	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
544	assert (("timer timeout in the past, negative repeat?", w->at > now));
545	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
546	}	819	}
547	else	820	else
548	ev_timer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
549		822
550	event ((W)w, EV_TIMEOUT);	823	event (EV_A_ (W)w, EV_TIMEOUT);
551	}	824	}
552	}	825	}
553		826
554	static void	827	static void
555	periodics_reify (void)	828	periodics_reify (EV_P)
556	{	829	{
557	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
558	{	831	{
559	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)));
560		835
561	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
562	if (w->interval)	837	if (w->interval)
563	{	838	{
564	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;
565	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));
566	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
567	}	842	}
568	else	843	else
569	ev_periodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
570		845
571	event ((W)w, EV_TIMEOUT);	846	event (EV_A_ (W)w, EV_PERIODIC);
572	}	847	}
573	}	848	}
574		849
575	static void	850	static void
576	periodics_reschedule (ev_tstamp diff)	851	periodics_reschedule (EV_P)
577	{	852	{
578	int i;	853	int i;
579		854
580	/* adjust periodics after time jump */	855	/* adjust periodics after time jump */
581	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
582	{	857	{
583	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
584		859
585	if (w->interval)	860	if (w->interval)
586	{	861	{
587	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;
588		863
589	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
590	{	865	{
591	ev_periodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
592	ev_periodic_start (w);	867	ev_periodic_start (EV_A_ w);
593		868
594	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
595	}	870	}
596	}	871	}
597	}	872	}
598	}	873	}
599		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
600	static void	893	static void
601	time_update (void)	894	time_update (EV_P)
602	{	895	{
603	int i;	896	int i;
604		897
605	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
606
607	if (have_monotonic)	899	if (expect_true (have_monotonic))
608	{	900	{
609	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
610
611	for (i = 4; --i; ) /* loop a few times, before making important decisions */
612	{	902	{
613	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
614	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
615		908
616	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
617	return; /* all is well */	910	return; /* all is well */
618		911
619	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) */
620	}	920	}
621
622	periodics_reschedule (diff - odiff);
623	/* no timer adjustment, as the monotonic clock doesn't jump */
624	}	921	}
625	else	922	else
		923	#endif
626	{	924	{
627	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))
628	{	928	{
629	periodics_reschedule (ev_now - now);	929	periodics_reschedule (EV_A);
630		930
631	/* 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 */
632	for (i = 0; i < timercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
633	timers [i]->at += diff;	933	((WT)timers [i])->at += rt_now - mn_now;
634	}	934	}
635		935
636	now = ev_now;	936	mn_now = rt_now;
637	}	937	}
638	}	938	}
639		939
640	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
641		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
642	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
643	{	956	{
644	double block;	957	double block;
645	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	958	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
646		959
647	do	960	do
648	{	961	{
649	/* queue check watchers (and execute them) */	962	/* queue check watchers (and execute them) */
650	if (preparecnt)	963	if (expect_false (preparecnt))
651	{	964	{
652	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
653	call_pending ();	966	call_pending (EV_A);
654	}	967	}
655		968
656	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
657	fd_reify ();	970	fd_reify (EV_A);
658		971
659	/* calculate blocking time */	972	/* calculate blocking time */
660		973
661	/* 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
662	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	{
663	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
664		985
665	if (flags & EVLOOP_NONBLOCK || idlecnt)	986	if (flags & EVLOOP_NONBLOCK || idlecnt)
666	block = 0.;	987	block = 0.;
667	else	988	else
668	{	989	{
669	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
670		991
671	if (timercnt)	992	if (timercnt)
672	{	993	{
673	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;
674	if (block > to) block = to;	995	if (block > to) block = to;
675	}	996	}
676		997
677	if (periodiccnt)	998	if (periodiccnt)
678	{	999	{
679	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
680	if (block > to) block = to;	1001	if (block > to) block = to;
681	}	1002	}
682		1003
683	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
684	}	1005	}
685		1006
686	method_poll (block);	1007	method_poll (EV_A_ block);
687		1008
688	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
689	time_update ();	1010	time_update (EV_A);
690		1011
691	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
692	timers_reify (); /* relative timers called last */	1013	timers_reify (EV_A); /* relative timers called last */
693	periodics_reify (); /* absolute timers called first */	1014	periodics_reify (EV_A); /* absolute timers called first */
694		1015
695	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
696	if (!pendingcnt)	1017	if (!pendingcnt)
697	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
698		1019
699	/* queue check watchers, to be executed first */	1020	/* queue check watchers, to be executed first */
700	if (checkcnt)	1021	if (checkcnt)
701	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
702		1023
703	call_pending ();	1024	call_pending (EV_A);
704	}	1025	}
705	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
706		1027
707	if (ev_loop_done != 2)	1028	if (loop_done != 2)
708	ev_loop_done = 0;	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
709	}	1036	}
710		1037
711	/*****************************************************************************/	1038	/*****************************************************************************/
712		1039
713	static void	1040	inline void
714	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
715	{	1042	{
716	elem->next = *head;	1043	elem->next = *head;
717	*head = elem;	1044	*head = elem;
718	}	1045	}
719		1046
720	static void	1047	inline void
721	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
722	{	1049	{
723	while (*head)	1050	while (*head)
724	{	1051	{
725	if (*head == elem)	1052	if (*head == elem)
…		…
730		1057
731	head = &(*head)->next;	1058	head = &(*head)->next;
732	}	1059	}
733	}	1060	}
734		1061
735	static void	1062	inline void
736	ev_clear (W w)	1063	ev_clear_pending (EV_P_ W w)
737	{	1064	{
738	if (w->pending)	1065	if (w->pending)
739	{	1066	{
740	pendings [w->pending - 1].w = 0;	1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
741	w->pending = 0;	1068	w->pending = 0;
742	}	1069	}
743	}	1070	}
744		1071
745	static void	1072	inline void
746	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
747	{	1074	{
		1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
748	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
749	}	1080	}
750		1081
751	static void	1082	inline void
752	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
753	{	1084	{
		1085	ev_unref (EV_A);
754	w->active = 0;	1086	w->active = 0;
755	}	1087	}
756		1088
757	/*****************************************************************************/	1089	/*****************************************************************************/
758		1090
759	void	1091	void
760	ev_io_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
761	{	1093	{
		1094	int fd = w->fd;
		1095
762	if (ev_is_active (w))	1096	if (ev_is_active (w))
763	return;	1097	return;
764		1098
765	int fd = w->fd;	1099	assert (("ev_io_start called with negative fd", fd >= 0));
766		1100
767	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
768	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
769	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
770		1104
771	fd_change (fd);	1105	fd_change (EV_A_ fd);
772	}	1106	}
773		1107
774	void	1108	void
775	ev_io_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
776	{	1110	{
777	ev_clear ((W)w);	1111	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
779	return;	1113	return;
780		1114
781	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
782	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
783		1117
784	fd_change (w->fd);	1118	fd_change (EV_A_ w->fd);
785	}	1119	}
786		1120
787	void	1121	void
788	ev_timer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
789	{	1123	{
790	if (ev_is_active (w))	1124	if (ev_is_active (w))
791	return;	1125	return;
792		1126
793	w->at += now;	1127	((WT)w)->at += mn_now;
794		1128
795	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.));
796		1130
797	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
798	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
799	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
800	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
801	}
802		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
803	void	1139	void
804	ev_timer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
805	{	1141	{
806	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
807	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
808	return;	1144	return;
809		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
810	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
811	{	1149	{
812	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
813	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
814	}	1152	}
815		1153
816	w->at = w->repeat;	1154	((WT)w)->at = w->repeat;
817		1155
818	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
819	}	1157	}
820		1158
821	void	1159	void
822	ev_timer_again (struct ev_timer *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
823	{	1161	{
824	if (ev_is_active (w))	1162	if (ev_is_active (w))
825	{	1163	{
826	if (w->repeat)	1164	if (w->repeat)
827	{	1165	{
828	w->at = now + w->repeat;	1166	((WT)w)->at = mn_now + w->repeat;
829	downheap ((WT *)timers, timercnt, w->active - 1);	1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
830	}	1168	}
831	else	1169	else
832	ev_timer_stop (w);	1170	ev_timer_stop (EV_A_ w);
833	}	1171	}
834	else if (w->repeat)	1172	else if (w->repeat)
835	ev_timer_start (w);	1173	ev_timer_start (EV_A_ w);
836	}	1174	}
837		1175
838	void	1176	void
839	ev_periodic_start (struct ev_periodic *w)	1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
840	{	1178	{
841	if (ev_is_active (w))	1179	if (ev_is_active (w))
842	return;	1180	return;
843		1181
844	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.));
845		1183
846	/* 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 */
847	if (w->interval)	1185	if (w->interval)
848	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;
849		1187
850	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
851	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
852	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
853	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
854	}
855		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
856	void	1196	void
857	ev_periodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
858	{	1198	{
859	ev_clear ((W)w);	1199	ev_clear_pending (EV_A_ (W)w);
860	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
861	return;	1201	return;
862		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
863	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
864	{	1206	{
865	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
866	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
867	}	1209	}
868		1210
869	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
870	}	1212	}
871		1213
872	void	1214	void
873	ev_signal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
874	{	1216	{
875	if (ev_is_active (w))	1217	if (ev_is_active (w))
876	return;	1218	return;
877		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
878	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
879	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
880	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
881		1298
882	if (!w->next)	1299	if (!((WL)w)->next)
883	{	1300	{
884	struct sigaction sa;	1301	struct sigaction sa;
885	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
886	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
887	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
888	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
889	}	1306	}
890	}	1307	}
891		1308
892	void	1309	void
893	ev_signal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
894	{	1311	{
895	ev_clear ((W)w);	1312	ev_clear_pending (EV_A_ (W)w);
896	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
897	return;	1314	return;
898		1315
899	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
900	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
901		1318
902	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
903	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
904	}	1321	}
905		1322
906	void	1323	void
907	ev_idle_start (struct ev_idle *w)	1324	ev_child_start (EV_P_ struct ev_child *w)
908	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
909	if (ev_is_active (w))	1329	if (ev_is_active (w))
910	return;	1330	return;
911		1331
912	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
913	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
914	idles [idlecnt - 1] = w;
915	}	1334	}
916		1335
917	void	1336	void
918	ev_idle_stop (struct ev_idle *w)	1337	ev_child_stop (EV_P_ struct ev_child *w)
919	{	1338	{
920	ev_clear ((W)w);	1339	ev_clear_pending (EV_A_ (W)w);
921	if (ev_is_active (w))	1340	if (ev_is_active (w))
922	return;	1341	return;
923		1342
924	idles [w->active - 1] = idles [--idlecnt];
925	ev_stop ((W)w);
926	}
927
928	void
929	ev_prepare_start (struct ev_prepare *w)
930	{
931	if (ev_is_active (w))
932	return;
933
934	ev_start ((W)w, ++preparecnt);
935	array_needsize (prepares, preparemax, preparecnt, );
936	prepares [preparecnt - 1] = w;
937	}
938
939	void
940	ev_prepare_stop (struct ev_prepare *w)
941	{
942	ev_clear ((W)w);
943	if (ev_is_active (w))
944	return;
945
946	prepares [w->active - 1] = prepares [--preparecnt];
947	ev_stop ((W)w);
948	}
949
950	void
951	ev_check_start (struct ev_check *w)
952	{
953	if (ev_is_active (w))
954	return;
955
956	ev_start ((W)w, ++checkcnt);
957	array_needsize (checks, checkmax, checkcnt, );
958	checks [checkcnt - 1] = w;
959	}
960
961	void
962	ev_check_stop (struct ev_check *w)
963	{
964	ev_clear ((W)w);
965	if (ev_is_active (w))
966	return;
967
968	checks [w->active - 1] = checks [--checkcnt];
969	ev_stop ((W)w);
970	}
971
972	void
973	ev_child_start (struct ev_child *w)
974	{
975	if (ev_is_active (w))
976	return;
977
978	ev_start ((W)w, 1);
979	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	}
981
982	void
983	ev_child_stop (struct ev_child *w)
984	{
985	ev_clear ((W)w);
986	if (ev_is_active (w))
987	return;
988
989	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	1344	ev_stop (EV_A_ (W)w);
991	}	1345	}
992		1346
993	/*****************************************************************************/	1347	/*****************************************************************************/
994		1348
995	struct ev_once	1349	struct ev_once
…		…
999	void (*cb)(int revents, void *arg);	1353	void (*cb)(int revents, void *arg);
1000	void *arg;	1354	void *arg;
1001	};	1355	};
1002		1356
1003	static void	1357	static void
1004	once_cb (struct ev_once *once, int revents)	1358	once_cb (EV_P_ struct ev_once *once, int revents)
1005	{	1359	{
1006	void (*cb)(int revents, void *arg) = once->cb;	1360	void (*cb)(int revents, void *arg) = once->cb;
1007	void *arg = once->arg;	1361	void *arg = once->arg;
1008		1362
1009	ev_io_stop (&once->io);	1363	ev_io_stop (EV_A_ &once->io);
1010	ev_timer_stop (&once->to);	1364	ev_timer_stop (EV_A_ &once->to);
1011	free (once);	1365	free (once);
1012		1366
1013	cb (revents, arg);	1367	cb (revents, arg);
1014	}	1368	}
1015		1369
1016	static void	1370	static void
1017	once_cb_io (struct ev_io *w, int revents)	1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
1018	{	1372	{
1019	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);
1020	}	1374	}
1021		1375
1022	static void	1376	static void
1023	once_cb_to (struct ev_timer *w, int revents)	1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1024	{	1378	{
1025	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);
1026	}	1380	}
1027		1381
1028	void	1382	void
1029	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)
1030	{	1384	{
1031	struct ev_once *once = malloc (sizeof (struct ev_once));	1385	struct ev_once *once = malloc (sizeof (struct ev_once));
1032		1386
1033	if (!once)	1387	if (!once)
1034	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1388	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1039		1393
1040	ev_watcher_init (&once->io, once_cb_io);	1394	ev_watcher_init (&once->io, once_cb_io);
1041	if (fd >= 0)	1395	if (fd >= 0)
1042	{	1396	{
1043	ev_io_set (&once->io, fd, events);	1397	ev_io_set (&once->io, fd, events);
1044	ev_io_start (&once->io);	1398	ev_io_start (EV_A_ &once->io);
1045	}	1399	}
1046		1400
1047	ev_watcher_init (&once->to, once_cb_to);	1401	ev_watcher_init (&once->to, once_cb_to);
1048	if (timeout >= 0.)	1402	if (timeout >= 0.)
1049	{	1403	{
1050	ev_timer_set (&once->to, timeout, 0.);	1404	ev_timer_set (&once->to, timeout, 0.);
1051	ev_timer_start (&once->to);	1405	ev_timer_start (EV_A_ &once->to);
1052	}	1406	}
1053	}	1407	}
1054	}	1408	}
1055		1409
1056	/*****************************************************************************/
1057
1058	#if 0
1059
1060	struct ev_io wio;
1061
1062	static void
1063	sin_cb (struct ev_io *w, int revents)
1064	{
1065	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1066	}
1067
1068	static void
1069	ocb (struct ev_timer *w, int revents)
1070	{
1071	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1072	ev_timer_stop (w);
1073	ev_timer_start (w);
1074	}
1075
1076	static void
1077	scb (struct ev_signal *w, int revents)
1078	{
1079	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1080	ev_io_stop (&wio);
1081	ev_io_start (&wio);
1082	}
1083
1084	static void
1085	gcb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "generic %x\n", revents);
1088
1089	}
1090
1091	int main (void)
1092	{
1093	ev_init (0);
1094
1095	ev_io_init (&wio, sin_cb, 0, EV_READ);
1096	ev_io_start (&wio);
1097
1098	struct ev_timer t[10000];
1099
1100	#if 0
1101	int i;
1102	for (i = 0; i < 10000; ++i)
1103	{
1104	struct ev_timer *w = t + i;
1105	ev_watcher_init (w, ocb, i);
1106	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1107	ev_timer_start (w);
1108	if (drand48 () < 0.5)
1109	ev_timer_stop (w);
1110	}
1111	#endif
1112
1113	struct ev_timer t1;
1114	ev_timer_init (&t1, ocb, 5, 10);
1115	ev_timer_start (&t1);
1116
1117	struct ev_signal sig;
1118	ev_signal_init (&sig, scb, SIGQUIT);
1119	ev_signal_start (&sig);
1120
1121	struct ev_check cw;
1122	ev_check_init (&cw, gcb);
1123	ev_check_start (&cw);
1124
1125	struct ev_idle iw;
1126	ev_idle_init (&iw, gcb);
1127	ev_idle_start (&iw);
1128
1129	ev_loop (0);
1130
1131	return 0;
1132	}
1133
1134	#endif
1135
1136
1137
1138

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