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Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 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_roundsize(base,n) ((n) | 4 & ~3)	220	#define array_roundsize(base,n) ((n) | 4 & ~3)
119		221
120	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
121	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
122	{ \	224	{ \
123	int newcnt = cur; \	225	int newcnt = cur; \
124	do \	226	do \
125	{ \	227	{ \
126	newcnt = array_roundsize (base, newcnt << 1); \	228	newcnt = array_roundsize (base, newcnt << 1); \
…		…
132	cur = newcnt; \	234	cur = newcnt; \
133	}	235	}
134		236
135	/*****************************************************************************/	237	/*****************************************************************************/
136		238
137	typedef struct
138	{
139	struct ev_io *head;
140	int events;
141	} ANFD;
142
143	static ANFD *anfds;
144	static int anfdmax;
145
146	static void	239	static void
147	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
148	{	241	{
149	while (count--)	242	while (count--)
150	{	243	{
151	base->head = 0;	244	base->head = 0;
152	base->events = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
153	++base;	248	++base;
154	}	249	}
155	}	250	}
156		251
157	typedef struct
158	{
159	W w;
160	int events;
161	} ANPENDING;
162
163	static ANPENDING *pendings;
164	static int pendingmax, pendingcnt;
165
166	static void	252	static void
167	event (W w, int events)	253	event (EV_P_ W w, int events)
168	{	254	{
		255	if (w->pending)
		256	{
		257	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		258	return;
		259	}
		260
169	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
170	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
171	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
173	}	265	}
174		266
175	static void	267	static void
176	queue_events (W *events, int eventcnt, int type)	268	queue_events (EV_P_ W *events, int eventcnt, int type)
177	{	269	{
178	int i;	270	int i;
179		271
180	for (i = 0; i < eventcnt; ++i)	272	for (i = 0; i < eventcnt; ++i)
181	event (events [i], type);	273	event (EV_A_ events [i], type);
182	}	274	}
183		275
184	static void	276	static void
185	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
186	{	278	{
187	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
188	struct ev_io *w;	280	struct ev_io *w;
189		281
190	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
191	{	283	{
192	int ev = w->events & events;	284	int ev = w->events & events;
193		285
194	if (ev)	286	if (ev)
195	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
196	}	288	}
197	}	289	}
198		290
199	/*****************************************************************************/	291	/*****************************************************************************/
200		292
201	static int *fdchanges;
202	static int fdchangemax, fdchangecnt;
203
204	static void	293	static void
205	fd_reify (void)	294	fd_reify (EV_P)
206	{	295	{
207	int i;	296	int i;
208		297
209	for (i = 0; i < fdchangecnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
210	{	299	{
…		…
212	ANFD *anfd = anfds + fd;	301	ANFD *anfd = anfds + fd;
213	struct ev_io *w;	302	struct ev_io *w;
214		303
215	int events = 0;	304	int events = 0;
216		305
217	for (w = anfd->head; w; w = w->next)	306	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
218	events |= w->events;	307	events |= w->events;
219		308
220	anfd->events &= ~EV_REIFY;	309	anfd->reify = 0;
221		310
222	if (anfd->events != events)
223	{
224	method_modify (fd, anfd->events, events);	311	method_modify (EV_A_ fd, anfd->events, events);
225	anfd->events = events;	312	anfd->events = events;
226	}
227	}	313	}
228		314
229	fdchangecnt = 0;	315	fdchangecnt = 0;
230	}	316	}
231		317
232	static void	318	static void
233	fd_change (int fd)	319	fd_change (EV_P_ int fd)
234	{	320	{
235	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	321	if (anfds [fd].reify || fdchangecnt < 0)
236	return;	322	return;
237		323
238	anfds [fd].events |= EV_REIFY;	324	anfds [fd].reify = 1;
239		325
240	++fdchangecnt;	326	++fdchangecnt;
241	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
242	fdchanges [fdchangecnt - 1] = fd;	328	fdchanges [fdchangecnt - 1] = fd;
243	}	329	}
244		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
245	/* called on EBADF to verify fds */	343	/* called on EBADF to verify fds */
246	static void	344	static void
247	fd_recheck (void)	345	fd_ebadf (EV_P)
248	{	346	{
249	int fd;	347	int fd;
250		348
251	for (fd = 0; fd < anfdmax; ++fd)	349	for (fd = 0; fd < anfdmax; ++fd)
252	if (anfds [fd].events)	350	if (anfds [fd].events)
253	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
254	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)
255	{	363	{
256	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	364	close (fd);
257	ev_io_stop (anfds [fd].head);	365	fd_kill (EV_A_ fd);
		366	return;
258	}	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	}
259	}	383	}
260		384
261	/*****************************************************************************/	385	/*****************************************************************************/
262		386
263	static struct ev_timer **timers;
264	static int timermax, timercnt;
265
266	static struct ev_periodic **periodics;
267	static int periodicmax, periodiccnt;
268
269	static void	387	static void
270	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
271	{	389	{
272	WT w = timers [k];	390	WT w = heap [k];
273		391
274	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
275	{	393	{
276	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
277	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
278	k >>= 1;	396	k >>= 1;
279	}	397	}
280		398
281	timers [k] = w;	399	heap [k] = w;
282	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
283		401
284	}	402	}
285		403
286	static void	404	static void
287	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
288	{	406	{
289	WT w = timers [k];	407	WT w = heap [k];
290		408
291	while (k < (N >> 1))	409	while (k < (N >> 1))
292	{	410	{
293	int j = k << 1;	411	int j = k << 1;
294		412
295	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296	++j;	414	++j;
297		415
298	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
299	break;	417	break;
300		418
301	timers [k] = timers [j];	419	heap [k] = heap [j];
302	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
303	k = j;	421	k = j;
304	}	422	}
305		423
306	timers [k] = w;	424	heap [k] = w;
307	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
308	}	426	}
309		427
310	/*****************************************************************************/	428	/*****************************************************************************/
311		429
312	typedef struct	430	typedef struct
313	{	431	{
314	struct ev_signal *head;	432	struct ev_watcher_list *head;
315	sig_atomic_t gotsig;	433	sig_atomic_t volatile gotsig;
316	} ANSIG;	434	} ANSIG;
317		435
318	static ANSIG *signals;	436	static ANSIG *signals;
319	static int signalmax;	437	static int signalmax;
320		438
321	static int sigpipe [2];	439	static int sigpipe [2];
322	static sig_atomic_t gotsig;	440	static sig_atomic_t volatile gotsig;
323	static struct ev_io sigev;	441	static struct ev_io sigev;
324		442
325	static void	443	static void
326	signals_init (ANSIG *base, int count)	444	signals_init (ANSIG *base, int count)
327	{	445	{
328	while (count--)	446	while (count--)
329	{	447	{
330	base->head = 0;	448	base->head = 0;
331	base->gotsig = 0;	449	base->gotsig = 0;
		450
332	++base;	451	++base;
333	}	452	}
334	}	453	}
335		454
336	static void	455	static void
…		…
338	{	457	{
339	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
340		459
341	if (!gotsig)	460	if (!gotsig)
342	{	461	{
		462	int old_errno = errno;
343	gotsig = 1;	463	gotsig = 1;
344	write (sigpipe [1], &gotsig, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
345	}	466	}
346	}	467	}
347		468
348	static void	469	static void
349	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
350	{	471	{
351	struct ev_signal *w;	472	struct ev_watcher_list *w;
352	int sig;	473	int signum;
353		474
		475	read (sigpipe [0], &revents, 1);
354	gotsig = 0;	476	gotsig = 0;
355	read (sigpipe [0], &revents, 1);
356		477
357	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
358	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
359	{	480	{
360	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
361		482
362	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
363	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
364	}	485	}
365	}	486	}
366		487
367	static void	488	static void
368	siginit (void)	489	siginit (EV_P)
369	{	490	{
		491	#ifndef WIN32
370	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
371	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372		494
373	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
374	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
375	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
376		499
377	ev_io_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
378	ev_io_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
379	}	503	}
380		504
381	/*****************************************************************************/	505	/*****************************************************************************/
382		506
383	static struct ev_idle **idles;	507	#ifndef WIN32
384	static int idlemax, idlecnt;
385
386	static struct ev_prepare **prepares;
387	static int preparemax, preparecnt;
388
389	static struct ev_check **checks;
390	static int checkmax, checkcnt;
391
392	/*****************************************************************************/
393		508
394	static struct ev_child *childs [PID_HASHSIZE];	509	static struct ev_child *childs [PID_HASHSIZE];
395	static struct ev_signal childev;	510	static struct ev_signal childev;
396		511
397	#ifndef WCONTINUED	512	#ifndef WCONTINUED
398	# define WCONTINUED 0	513	# define WCONTINUED 0
399	#endif	514	#endif
400		515
401	static void	516	static void
402	childcb (struct ev_signal *sw, int revents)	517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403	{	518	{
404	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	{
405	int pid, status;	534	int pid, status;
406		535
407	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	536	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
408	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	537	{
409	if (w->pid == pid || w->pid == -1)	538	/* make sure we are called again until all childs have been reaped */
410	{	539	event (EV_A_ (W)sw, EV_SIGNAL);
411	w->status = status;	540
412	event ((W)w, EV_CHILD);	541	child_reap (EV_A_ sw, pid, pid, status);
413	}	542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
414	}	544	}
		545
		546	#endif
415		547
416	/*****************************************************************************/	548	/*****************************************************************************/
417		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
418	#if EV_USE_EPOLL	553	#if EV_USE_EPOLL
419	# include "ev_epoll.c"	554	# include "ev_epoll.c"
420	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
421	#if EV_USE_SELECT	559	#if EV_USE_SELECT
422	# include "ev_select.c"	560	# include "ev_select.c"
423	#endif	561	#endif
424		562
425	int	563	int
…		…
432	ev_version_minor (void)	570	ev_version_minor (void)
433	{	571	{
434	return EV_VERSION_MINOR;	572	return EV_VERSION_MINOR;
435	}	573	}
436		574
437	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)
438	{	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	{
439	if (!ev_method)	596	if (!method)
440	{	597	{
441	#if EV_USE_MONOTONIC	598	#if EV_USE_MONOTONIC
442	{	599	{
443	struct timespec ts;	600	struct timespec ts;
444	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445	have_monotonic = 1;	602	have_monotonic = 1;
446	}	603	}
447	#endif	604	#endif
448		605
449	ev_now = ev_time ();	606	rt_now = ev_time ();
450	now = get_clock ();	607	mn_now = get_clock ();
		608	now_floor = mn_now;
451	diff = ev_now - now;	609	rtmn_diff = rt_now - mn_now;
452		610
453	if (pipe (sigpipe))	611	if (methods == EVMETHOD_AUTO)
454	return 0;	612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
455		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
456	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
457	#if EV_USE_EPOLL	624	#if EV_USE_EPOLL
458	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);
459	#endif	629	#endif
460	#if EV_USE_SELECT	630	#if EV_USE_SELECT
461	if (ev_method == EVMETHOD_NONE) select_init (flags);	631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
462	#endif	632	#endif
		633	}
		634	}
463		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
464	if (ev_method)	726	if (ev_method (EV_A))
465	{	727	{
466	ev_watcher_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
467	siginit ();	730	siginit (EV_A);
468		731
		732	#ifndef WIN32
469	ev_signal_init (&childev, childcb, SIGCHLD);	733	ev_signal_init (&childev, childcb, SIGCHLD);
		734	ev_set_priority (&childev, EV_MAXPRI);
470	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
471	}	738	}
		739	else
		740	default_loop = 0;
472	}	741	}
473		742
474	return ev_method;	743	return default_loop;
475	}	744	}
476		745
477	/*****************************************************************************/
478
479	void	746	void
480	ev_prefork (void)	747	ev_default_destroy (void)
481	{	748	{
482	/* nop */	749	#if EV_MULTIPLICITY
483	}	750	struct ev_loop *loop = default_loop;
484
485	void
486	ev_postfork_parent (void)
487	{
488	/* nop */
489	}
490
491	void
492	ev_postfork_child (void)
493	{
494	#if EV_USE_EPOLL
495	if (ev_method == EVMETHOD_EPOLL)
496	epoll_postfork_child ();
497	#endif	751	#endif
498		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
499	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);
500	close (sigpipe [0]);	775	close (sigpipe [0]);
501	close (sigpipe [1]);	776	close (sigpipe [1]);
502	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
503	siginit ();	780	siginit (EV_A);
504	}	781	}
505		782
506	/*****************************************************************************/	783	/*****************************************************************************/
507		784
508	static void	785	static void
509	call_pending (void)	786	call_pending (EV_P)
510	{	787	{
		788	int pri;
		789
		790	for (pri = NUMPRI; pri--; )
511	while (pendingcnt)	791	while (pendingcnt [pri])
512	{	792	{
513	ANPENDING *p = pendings + --pendingcnt;	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514		794
515	if (p->w)	795	if (p->w)
516	{	796	{
517	p->w->pending = 0;	797	p->w->pending = 0;
518	p->w->cb (p->w, p->events);	798
		799	(*(void (**)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
519	}	800	}
520	}	801	}
521	}	802	}
522		803
523	static void	804	static void
524	timers_reify (void)	805	timers_reify (EV_P)
525	{	806	{
526	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
527	{	808	{
528	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)));
529		812
530	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
531	if (w->repeat)	814	if (w->repeat)
532	{	815	{
		816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
536	}	819	}
537	else	820	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539		822
540	event ((W)w, EV_TIMEOUT);	823	event (EV_A_ (W)w, EV_TIMEOUT);
541	}	824	}
542	}	825	}
543		826
544	static void	827	static void
545	periodics_reify (void)	828	periodics_reify (EV_P)
546	{	829	{
547	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
548	{	831	{
549	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)));
550		835
551	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
552	if (w->interval)	837	if (w->interval)
553	{	838	{
554	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;
555	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));
556	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
557	}	842	}
558	else	843	else
559	ev_periodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560		845
561	event ((W)w, EV_TIMEOUT);	846	event (EV_A_ (W)w, EV_PERIODIC);
562	}	847	}
563	}	848	}
564		849
565	static void	850	static void
566	periodics_reschedule (ev_tstamp diff)	851	periodics_reschedule (EV_P)
567	{	852	{
568	int i;	853	int i;
569		854
570	/* adjust periodics after time jump */	855	/* adjust periodics after time jump */
571	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
572	{	857	{
573	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
574		859
575	if (w->interval)	860	if (w->interval)
576	{	861	{
577	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;
578		863
579	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
580	{	865	{
581	ev_periodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
582	ev_periodic_start (w);	867	ev_periodic_start (EV_A_ w);
583		868
584	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
585	}	870	}
586	}	871	}
587	}	872	}
588	}	873	}
589		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
590	static void	893	static void
591	time_update (void)	894	time_update (EV_P)
592	{	895	{
593	int i;	896	int i;
594		897
595	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
596
597	if (have_monotonic)	899	if (expect_true (have_monotonic))
598	{	900	{
599	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
600
601	for (i = 4; --i; ) /* loop a few times, before making important decisions */
602	{	902	{
603	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
604	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
605		908
606	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
607	return; /* all is well */	910	return; /* all is well */
608		911
609	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) */
610	}	920	}
611
612	periodics_reschedule (diff - odiff);
613	/* no timer adjustment, as the monotonic clock doesn't jump */
614	}	921	}
615	else	922	else
		923	#endif
616	{	924	{
617	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))
618	{	928	{
619	periodics_reschedule (ev_now - now);	929	periodics_reschedule (EV_A);
620		930
621	/* 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 */
622	for (i = 0; i < timercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
623	timers [i]->at += diff;	933	((WT)timers [i])->at += rt_now - mn_now;
624	}	934	}
625		935
626	now = ev_now;	936	mn_now = rt_now;
627	}	937	}
628	}	938	}
629		939
630	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
631		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
632	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
633	{	956	{
634	double block;	957	double block;
635	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	958	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
636		959
637	do	960	do
638	{	961	{
639	/* queue check watchers (and execute them) */	962	/* queue check watchers (and execute them) */
640	if (preparecnt)	963	if (expect_false (preparecnt))
641	{	964	{
642	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643	call_pending ();	966	call_pending (EV_A);
644	}	967	}
645		968
646	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
647	fd_reify ();	970	fd_reify (EV_A);
648		971
649	/* calculate blocking time */	972	/* calculate blocking time */
650		973
651	/* 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
652	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	{
653	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
654		985
655	if (flags & EVLOOP_NONBLOCK || idlecnt)	986	if (flags & EVLOOP_NONBLOCK || idlecnt)
656	block = 0.;	987	block = 0.;
657	else	988	else
658	{	989	{
659	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
660		991
661	if (timercnt)	992	if (timercnt)
662	{	993	{
663	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;
664	if (block > to) block = to;	995	if (block > to) block = to;
665	}	996	}
666		997
667	if (periodiccnt)	998	if (periodiccnt)
668	{	999	{
669	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
670	if (block > to) block = to;	1001	if (block > to) block = to;
671	}	1002	}
672		1003
673	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
674	}	1005	}
675		1006
676	method_poll (block);	1007	method_poll (EV_A_ block);
677		1008
678	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
679	time_update ();	1010	time_update (EV_A);
680		1011
681	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
682	timers_reify (); /* relative timers called last */	1013	timers_reify (EV_A); /* relative timers called last */
683	periodics_reify (); /* absolute timers called first */	1014	periodics_reify (EV_A); /* absolute timers called first */
684		1015
685	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
686	if (!pendingcnt)	1017	if (!pendingcnt)
687	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688		1019
689	/* queue check watchers, to be executed first */	1020	/* queue check watchers, to be executed first */
690	if (checkcnt)	1021	if (checkcnt)
691	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692		1023
693	call_pending ();	1024	call_pending (EV_A);
694	}	1025	}
695	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
696		1027
697	if (ev_loop_done != 2)	1028	if (loop_done != 2)
698	ev_loop_done = 0;	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
699	}	1036	}
700		1037
701	/*****************************************************************************/	1038	/*****************************************************************************/
702		1039
703	static void	1040	inline void
704	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
705	{	1042	{
706	elem->next = *head;	1043	elem->next = *head;
707	*head = elem;	1044	*head = elem;
708	}	1045	}
709		1046
710	static void	1047	inline void
711	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
712	{	1049	{
713	while (*head)	1050	while (*head)
714	{	1051	{
715	if (*head == elem)	1052	if (*head == elem)
…		…
720		1057
721	head = &(*head)->next;	1058	head = &(*head)->next;
722	}	1059	}
723	}	1060	}
724		1061
725	static void	1062	inline void
726	ev_clear (W w)	1063	ev_clear_pending (EV_P_ W w)
727	{	1064	{
728	if (w->pending)	1065	if (w->pending)
729	{	1066	{
730	pendings [w->pending - 1].w = 0;	1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
731	w->pending = 0;	1068	w->pending = 0;
732	}	1069	}
733	}	1070	}
734		1071
735	static void	1072	inline void
736	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
737	{	1074	{
		1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
738	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
739	}	1080	}
740		1081
741	static void	1082	inline void
742	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
743	{	1084	{
		1085	ev_unref (EV_A);
744	w->active = 0;	1086	w->active = 0;
745	}	1087	}
746		1088
747	/*****************************************************************************/	1089	/*****************************************************************************/
748		1090
749	void	1091	void
750	ev_io_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
751	{	1093	{
		1094	int fd = w->fd;
		1095
752	if (ev_is_active (w))	1096	if (ev_is_active (w))
753	return;	1097	return;
754		1098
755	int fd = w->fd;	1099	assert (("ev_io_start called with negative fd", fd >= 0));
756		1100
757	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
758	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
759	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
760		1104
761	fd_change (fd);	1105	fd_change (EV_A_ fd);
762	}	1106	}
763		1107
764	void	1108	void
765	ev_io_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
766	{	1110	{
767	ev_clear ((W)w);	1111	ev_clear_pending (EV_A_ (W)w);
768	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
769	return;	1113	return;
770		1114
771	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
773		1117
774	fd_change (w->fd);	1118	fd_change (EV_A_ w->fd);
775	}	1119	}
776		1120
777	void	1121	void
778	ev_timer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
779	{	1123	{
780	if (ev_is_active (w))	1124	if (ev_is_active (w))
781	return;	1125	return;
782		1126
783	w->at += now;	1127	((WT)w)->at += mn_now;
784		1128
785	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.));
786		1130
787	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
788	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
789	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
790	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
791	}
792		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
793	void	1139	void
794	ev_timer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
795	{	1141	{
796	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
798	return;	1144	return;
799		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
800	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
801	{	1149	{
802	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
803	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
804	}	1152	}
805		1153
806	w->at = w->repeat;	1154	((WT)w)->at = w->repeat;
807		1155
808	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
809	}	1157	}
810		1158
811	void	1159	void
812	ev_timer_again (struct ev_timer *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
813	{	1161	{
814	if (ev_is_active (w))	1162	if (ev_is_active (w))
815	{	1163	{
816	if (w->repeat)	1164	if (w->repeat)
817	{	1165	{
818	w->at = now + w->repeat;	1166	((WT)w)->at = mn_now + w->repeat;
819	downheap ((WT *)timers, timercnt, w->active - 1);	1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1168	}
821	else	1169	else
822	ev_timer_stop (w);	1170	ev_timer_stop (EV_A_ w);
823	}	1171	}
824	else if (w->repeat)	1172	else if (w->repeat)
825	ev_timer_start (w);	1173	ev_timer_start (EV_A_ w);
826	}	1174	}
827		1175
828	void	1176	void
829	ev_periodic_start (struct ev_periodic *w)	1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
830	{	1178	{
831	if (ev_is_active (w))	1179	if (ev_is_active (w))
832	return;	1180	return;
833		1181
834	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.));
835		1183
836	/* 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 */
837	if (w->interval)	1185	if (w->interval)
838	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;
839		1187
840	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
841	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
842	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
843	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
844	}
845		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
846	void	1196	void
847	ev_periodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
848	{	1198	{
849	ev_clear ((W)w);	1199	ev_clear_pending (EV_A_ (W)w);
850	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
851	return;	1201	return;
852		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
853	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
854	{	1206	{
855	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
856	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
857	}	1209	}
858		1210
859	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
860	}	1212	}
861		1213
862	void	1214	void
863	ev_signal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
864	{	1216	{
865	if (ev_is_active (w))	1217	if (ev_is_active (w))
866	return;	1218	return;
867		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
868	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
869	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
870	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871		1298
872	if (!w->next)	1299	if (!((WL)w)->next)
873	{	1300	{
874	struct sigaction sa;	1301	struct sigaction sa;
875	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
876	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
877	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
879	}	1306	}
880	}	1307	}
881		1308
882	void	1309	void
883	ev_signal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
884	{	1311	{
885	ev_clear ((W)w);	1312	ev_clear_pending (EV_A_ (W)w);
886	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
887	return;	1314	return;
888		1315
889	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
891		1318
892	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
893	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
894	}	1321	}
895		1322
896	void	1323	void
897	ev_idle_start (struct ev_idle *w)	1324	ev_child_start (EV_P_ struct ev_child *w)
898	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
899	if (ev_is_active (w))	1329	if (ev_is_active (w))
900	return;	1330	return;
901		1331
902	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
903	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
904	idles [idlecnt - 1] = w;
905	}	1334	}
906		1335
907	void	1336	void
908	ev_idle_stop (struct ev_idle *w)	1337	ev_child_stop (EV_P_ struct ev_child *w)
909	{	1338	{
910	ev_clear ((W)w);	1339	ev_clear_pending (EV_A_ (W)w);
911	if (ev_is_active (w))	1340	if (ev_is_active (w))
912	return;	1341	return;
913		1342
914	idles [w->active - 1] = idles [--idlecnt];
915	ev_stop ((W)w);
916	}
917
918	void
919	ev_prepare_start (struct ev_prepare *w)
920	{
921	if (ev_is_active (w))
922	return;
923
924	ev_start ((W)w, ++preparecnt);
925	array_needsize (prepares, preparemax, preparecnt, );
926	prepares [preparecnt - 1] = w;
927	}
928
929	void
930	ev_prepare_stop (struct ev_prepare *w)
931	{
932	ev_clear ((W)w);
933	if (ev_is_active (w))
934	return;
935
936	prepares [w->active - 1] = prepares [--preparecnt];
937	ev_stop ((W)w);
938	}
939
940	void
941	ev_check_start (struct ev_check *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, ++checkcnt);
947	array_needsize (checks, checkmax, checkcnt, );
948	checks [checkcnt - 1] = w;
949	}
950
951	void
952	ev_check_stop (struct ev_check *w)
953	{
954	ev_clear ((W)w);
955	if (ev_is_active (w))
956	return;
957
958	checks [w->active - 1] = checks [--checkcnt];
959	ev_stop ((W)w);
960	}
961
962	void
963	ev_child_start (struct ev_child *w)
964	{
965	if (ev_is_active (w))
966	return;
967
968	ev_start ((W)w, 1);
969	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	}
971
972	void
973	ev_child_stop (struct ev_child *w)
974	{
975	ev_clear ((W)w);
976	if (ev_is_active (w))
977	return;
978
979	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	ev_stop ((W)w);	1344	ev_stop (EV_A_ (W)w);
981	}	1345	}
982		1346
983	/*****************************************************************************/	1347	/*****************************************************************************/
984		1348
985	struct ev_once	1349	struct ev_once
…		…
989	void (*cb)(int revents, void *arg);	1353	void (*cb)(int revents, void *arg);
990	void *arg;	1354	void *arg;
991	};	1355	};
992		1356
993	static void	1357	static void
994	once_cb (struct ev_once *once, int revents)	1358	once_cb (EV_P_ struct ev_once *once, int revents)
995	{	1359	{
996	void (*cb)(int revents, void *arg) = once->cb;	1360	void (*cb)(int revents, void *arg) = once->cb;
997	void *arg = once->arg;	1361	void *arg = once->arg;
998		1362
999	ev_io_stop (&once->io);	1363	ev_io_stop (EV_A_ &once->io);
1000	ev_timer_stop (&once->to);	1364	ev_timer_stop (EV_A_ &once->to);
1001	free (once);	1365	free (once);
1002		1366
1003	cb (revents, arg);	1367	cb (revents, arg);
1004	}	1368	}
1005		1369
1006	static void	1370	static void
1007	once_cb_io (struct ev_io *w, int revents)	1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
1008	{	1372	{
1009	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);
1010	}	1374	}
1011		1375
1012	static void	1376	static void
1013	once_cb_to (struct ev_timer *w, int revents)	1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014	{	1378	{
1015	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);
1016	}	1380	}
1017		1381
1018	void	1382	void
1019	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)
1020	{	1384	{
1021	struct ev_once *once = malloc (sizeof (struct ev_once));	1385	struct ev_once *once = malloc (sizeof (struct ev_once));
1022		1386
1023	if (!once)	1387	if (!once)
1024	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1388	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1029		1393
1030	ev_watcher_init (&once->io, once_cb_io);	1394	ev_watcher_init (&once->io, once_cb_io);
1031	if (fd >= 0)	1395	if (fd >= 0)
1032	{	1396	{
1033	ev_io_set (&once->io, fd, events);	1397	ev_io_set (&once->io, fd, events);
1034	ev_io_start (&once->io);	1398	ev_io_start (EV_A_ &once->io);
1035	}	1399	}
1036		1400
1037	ev_watcher_init (&once->to, once_cb_to);	1401	ev_watcher_init (&once->to, once_cb_to);
1038	if (timeout >= 0.)	1402	if (timeout >= 0.)
1039	{	1403	{
1040	ev_timer_set (&once->to, timeout, 0.);	1404	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1405	ev_timer_start (EV_A_ &once->to);
1042	}	1406	}
1043	}	1407	}
1044	}	1408	}
1045		1409
1046	/*****************************************************************************/
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif
1102
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
1128

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