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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 1.62 by root, Sun Nov 4 20:38:07 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)	311	if (anfd->events != events)
233	{	312	{
234	method_modify (fd, anfd->events, events);	313	method_modify (EV_A_ fd, anfd->events, events);
235	anfd->events = events;	314	anfd->events = events;
236	}	315	}
237	}	316	}
238		317
239	fdchangecnt = 0;	318	fdchangecnt = 0;
240	}	319	}
241		320
242	static void	321	static void
243	fd_change (int fd)	322	fd_change (EV_P_ int fd)
244	{	323	{
245	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	324	if (anfds [fd].reify || fdchangecnt < 0)
246	return;	325	return;
247		326
248	anfds [fd].events |= EV_REIFY;	327	anfds [fd].reify = 1;
249		328
250	++fdchangecnt;	329	++fdchangecnt;
251	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
252	fdchanges [fdchangecnt - 1] = fd;	331	fdchanges [fdchangecnt - 1] = fd;
253	}	332	}
254		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		343	}
		344	}
		345
255	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
256	static void	347	static void
257	fd_recheck (void)	348	fd_ebadf (EV_P)
258	{	349	{
259	int fd;	350	int fd;
260		351
261	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
262	if (anfds [fd].events)	353	if (anfds [fd].events)
263	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
264	while (anfds [fd].head)	355	fd_kill (EV_A_ fd);
		356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
265	{	366	{
266	ev_io_stop (anfds [fd].head);	367	close (fd);
267	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	368	fd_kill (EV_A_ fd);
		369	return;
268	}	370	}
		371	}
		372
		373	/* susually called after fork if method needs to re-arm all fds from scratch */
		374	static void
		375	fd_rearm_all (EV_P)
		376	{
		377	int fd;
		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
269	}	386	}
270		387
271	/*****************************************************************************/	388	/*****************************************************************************/
272		389
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	390	static void
280	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
281	{	392	{
282	WT w = timers [k];	393	WT w = heap [k];
283		394
284	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
285	{	396	{
286	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
287	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
288	k >>= 1;	399	k >>= 1;
289	}	400	}
290		401
291	timers [k] = w;	402	heap [k] = w;
292	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
293		404
294	}	405	}
295		406
296	static void	407	static void
297	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
298	{	409	{
299	WT w = timers [k];	410	WT w = heap [k];
300		411
301	while (k < (N >> 1))	412	while (k < (N >> 1))
302	{	413	{
303	int j = k << 1;	414	int j = k << 1;
304		415
305	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
306	++j;	417	++j;
307		418
308	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
309	break;	420	break;
310		421
311	timers [k] = timers [j];	422	heap [k] = heap [j];
312	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
313	k = j;	424	k = j;
314	}	425	}
315		426
316	timers [k] = w;	427	heap [k] = w;
317	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
318	}	429	}
319		430
320	/*****************************************************************************/	431	/*****************************************************************************/
321		432
322	typedef struct	433	typedef struct
323	{	434	{
324	struct ev_signal *head;	435	struct ev_watcher_list *head;
325	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
326	} ANSIG;	437	} ANSIG;
327		438
328	static ANSIG *signals;	439	static ANSIG *signals;
329	static int signalmax;	440	static int signalmax;
330		441
331	static int sigpipe [2];	442	static int sigpipe [2];
332	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
333	static struct ev_io sigev;	444	static struct ev_io sigev;
334		445
335	static void	446	static void
336	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
337	{	448	{
338	while (count--)	449	while (count--)
339	{	450	{
340	base->head = 0;	451	base->head = 0;
341	base->gotsig = 0;	452	base->gotsig = 0;
		453
342	++base;	454	++base;
343	}	455	}
344	}	456	}
345		457
346	static void	458	static void
…		…
348	{	460	{
349	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
350		462
351	if (!gotsig)	463	if (!gotsig)
352	{	464	{
		465	int old_errno = errno;
353	gotsig = 1;	466	gotsig = 1;
354	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
355	}	469	}
356	}	470	}
357		471
358	static void	472	static void
359	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
360	{	474	{
361	struct ev_signal *w;	475	struct ev_watcher_list *w;
362	int sig;	476	int signum;
363		477
		478	read (sigpipe [0], &revents, 1);
364	gotsig = 0;	479	gotsig = 0;
365	read (sigpipe [0], &revents, 1);
366		480
367	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
368	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
369	{	483	{
370	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
371		485
372	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
373	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
374	}	488	}
375	}	489	}
376		490
377	static void	491	static void
378	siginit (void)	492	siginit (EV_P)
379	{	493	{
		494	#ifndef WIN32
380	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
381	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
382		497
383	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
384	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
385	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
386		502
387	ev_io_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
388	ev_io_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
389	}	506	}
390		507
391	/*****************************************************************************/	508	/*****************************************************************************/
392		509
393	static struct ev_idle **idles;	510	#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		511
404	static struct ev_child *childs [PID_HASHSIZE];	512	static struct ev_child *childs [PID_HASHSIZE];
405	static struct ev_signal childev;	513	static struct ev_signal childev;
406		514
407	#ifndef WCONTINUED	515	#ifndef WCONTINUED
408	# define WCONTINUED 0	516	# define WCONTINUED 0
409	#endif	517	#endif
410		518
411	static void	519	static void
412	childcb (struct ev_signal *sw, int revents)	520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
413	{	521	{
414	struct ev_child *w;	522	struct ev_child *w;
		523
		524	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		525	if (w->pid == pid || !w->pid)
		526	{
		527	w->priority = sw->priority; /* need to do it *now* */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
415	int pid, status;	537	int pid, status;
416		538
417	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
418	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	540	{
419	if (w->pid == pid || w->pid == -1)	541	/* make sure we are called again until all childs have been reaped */
420	{	542	event (EV_A_ (W)sw, EV_SIGNAL);
421	w->status = status;	543
422	event ((W)w, EV_CHILD);	544	child_reap (EV_A_ sw, pid, pid, status);
423	}	545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
424	}	547	}
		548
		549	#endif
425		550
426	/*****************************************************************************/	551	/*****************************************************************************/
427		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
428	#if EV_USE_EPOLL	556	#if EV_USE_EPOLL
429	# include "ev_epoll.c"	557	# include "ev_epoll.c"
430	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
431	#if EV_USE_SELECT	562	#if EV_USE_SELECT
432	# include "ev_select.c"	563	# include "ev_select.c"
433	#endif	564	#endif
434		565
435	int	566	int
…		…
442	ev_version_minor (void)	573	ev_version_minor (void)
443	{	574	{
444	return EV_VERSION_MINOR;	575	return EV_VERSION_MINOR;
445	}	576	}
446		577
447	int ev_init (int flags)	578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
448	{	581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	|| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
449	if (!ev_method)	599	if (!method)
450	{	600	{
451	#if EV_USE_MONOTONIC	601	#if EV_USE_MONOTONIC
452	{	602	{
453	struct timespec ts;	603	struct timespec ts;
454	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
455	have_monotonic = 1;	605	have_monotonic = 1;
456	}	606	}
457	#endif	607	#endif
458		608
459	ev_now = ev_time ();	609	rt_now = ev_time ();
460	now = get_clock ();	610	mn_now = get_clock ();
		611	now_floor = mn_now;
461	diff = ev_now - now;	612	rtmn_diff = rt_now - mn_now;
462		613
463	if (pipe (sigpipe))	614	if (methods == EVMETHOD_AUTO)
464	return 0;	615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
465		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
466	ev_method = EVMETHOD_NONE;	618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
467	#if EV_USE_EPOLL	627	#if EV_USE_EPOLL
468	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
469	#endif	632	#endif
470	#if EV_USE_SELECT	633	#if EV_USE_SELECT
471	if (ev_method == EVMETHOD_NONE) select_init (flags);	634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
472	#endif	635	#endif
		636	}
		637	}
473		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	#if EV_USE_WIN32
		643	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		644	#endif
		645	#if EV_USE_KQUEUE
		646	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		647	#endif
		648	#if EV_USE_EPOLL
		649	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_POLL
		652	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		653	#endif
		654	#if EV_USE_SELECT
		655	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		656	#endif
		657
		658	method = 0;
		659	/*TODO*/
		660	}
		661
		662	void
		663	loop_fork (EV_P)
		664	{
		665	/*TODO*/
		666	#if EV_USE_EPOLL
		667	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		668	#endif
		669	#if EV_USE_KQUEUE
		670	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		671	#endif
		672	}
		673
		674	#if EV_MULTIPLICITY
		675	struct ev_loop *
		676	ev_loop_new (int methods)
		677	{
		678	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		679
		680	loop_init (EV_A_ methods);
		681
		682	if (ev_method (EV_A))
		683	return loop;
		684
		685	return 0;
		686	}
		687
		688	void
		689	ev_loop_destroy (EV_P)
		690	{
		691	loop_destroy (EV_A);
		692	free (loop);
		693	}
		694
		695	void
		696	ev_loop_fork (EV_P)
		697	{
		698	loop_fork (EV_A);
		699	}
		700
		701	#endif
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop default_loop_struct;
		705	static struct ev_loop *default_loop;
		706
		707	struct ev_loop *
		708	#else
		709	static int default_loop;
		710
		711	int
		712	#endif
		713	ev_default_loop (int methods)
		714	{
		715	if (sigpipe [0] == sigpipe [1])
		716	if (pipe (sigpipe))
		717	return 0;
		718
		719	if (!default_loop)
		720	{
		721	#if EV_MULTIPLICITY
		722	struct ev_loop *loop = default_loop = &default_loop_struct;
		723	#else
		724	default_loop = 1;
		725	#endif
		726
		727	loop_init (EV_A_ methods);
		728
474	if (ev_method)	729	if (ev_method (EV_A))
475	{	730	{
476	ev_watcher_init (&sigev, sigcb);	731	ev_watcher_init (&sigev, sigcb);
		732	ev_set_priority (&sigev, EV_MAXPRI);
477	siginit ();	733	siginit (EV_A);
478		734
		735	#ifndef WIN32
479	ev_signal_init (&childev, childcb, SIGCHLD);	736	ev_signal_init (&childev, childcb, SIGCHLD);
		737	ev_set_priority (&childev, EV_MAXPRI);
480	ev_signal_start (&childev);	738	ev_signal_start (EV_A_ &childev);
		739	ev_unref (EV_A); /* child watcher should not keep loop alive */
		740	#endif
481	}	741	}
		742	else
		743	default_loop = 0;
482	}	744	}
483		745
484	return ev_method;	746	return default_loop;
485	}	747	}
486		748
487	/*****************************************************************************/
488
489	void	749	void
490	ev_prefork (void)	750	ev_default_destroy (void)
491	{	751	{
492	/* nop */	752	#if EV_MULTIPLICITY
493	}	753	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	754	#endif
508		755
		756	ev_ref (EV_A); /* child watcher */
		757	ev_signal_stop (EV_A_ &childev);
		758
		759	ev_ref (EV_A); /* signal watcher */
509	ev_io_stop (&sigev);	760	ev_io_stop (EV_A_ &sigev);
		761
		762	close (sigpipe [0]); sigpipe [0] = 0;
		763	close (sigpipe [1]); sigpipe [1] = 0;
		764
		765	loop_destroy (EV_A);
		766	}
		767
		768	void
		769	ev_default_fork (void)
		770	{
		771	#if EV_MULTIPLICITY
		772	struct ev_loop *loop = default_loop;
		773	#endif
		774
		775	loop_fork (EV_A);
		776
		777	ev_io_stop (EV_A_ &sigev);
510	close (sigpipe [0]);	778	close (sigpipe [0]);
511	close (sigpipe [1]);	779	close (sigpipe [1]);
512	pipe (sigpipe);	780	pipe (sigpipe);
		781
		782	ev_ref (EV_A); /* signal watcher */
513	siginit ();	783	siginit (EV_A);
514	}	784	}
515		785
516	/*****************************************************************************/	786	/*****************************************************************************/
517		787
518	static void	788	static void
519	call_pending (void)	789	call_pending (EV_P)
520	{	790	{
		791	int pri;
		792
		793	for (pri = NUMPRI; pri--; )
521	while (pendingcnt)	794	while (pendingcnt [pri])
522	{	795	{
523	ANPENDING *p = pendings + --pendingcnt;	796	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
524		797
525	if (p->w)	798	if (p->w)
526	{	799	{
527	p->w->pending = 0;	800	p->w->pending = 0;
528	p->w->cb (p->w, p->events);	801	p->w->cb (EV_A_ p->w, p->events);
529	}	802	}
530	}	803	}
531	}	804	}
532		805
533	static void	806	static void
534	timers_reify (void)	807	timers_reify (EV_P)
535	{	808	{
536	while (timercnt && timers [0]->at <= now)	809	while (timercnt && timers [0]->at <= mn_now)
537	{	810	{
538	struct ev_timer *w = timers [0];	811	struct ev_timer *w = timers [0];
		812
		813	assert (("inactive timer on timer heap detected", ev_is_active (w)));
539		814
540	/* first reschedule or stop timer */	815	/* first reschedule or stop timer */
541	if (w->repeat)	816	if (w->repeat)
542	{	817	{
		818	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
543	w->at = now + w->repeat;	819	w->at = mn_now + w->repeat;
544	assert (("timer timeout in the past, negative repeat?", w->at > now));
545	downheap ((WT *)timers, timercnt, 0);	820	downheap ((WT *)timers, timercnt, 0);
546	}	821	}
547	else	822	else
548	ev_timer_stop (w); /* nonrepeating: stop timer */	823	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
549		824
550	event ((W)w, EV_TIMEOUT);	825	event (EV_A_ (W)w, EV_TIMEOUT);
551	}	826	}
552	}	827	}
553		828
554	static void	829	static void
555	periodics_reify (void)	830	periodics_reify (EV_P)
556	{	831	{
557	while (periodiccnt && periodics [0]->at <= ev_now)	832	while (periodiccnt && periodics [0]->at <= rt_now)
558	{	833	{
559	struct ev_periodic *w = periodics [0];	834	struct ev_periodic *w = periodics [0];
		835
		836	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
560		837
561	/* first reschedule or stop timer */	838	/* first reschedule or stop timer */
562	if (w->interval)	839	if (w->interval)
563	{	840	{
564	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	841	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
565	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	842	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
566	downheap ((WT *)periodics, periodiccnt, 0);	843	downheap ((WT *)periodics, periodiccnt, 0);
567	}	844	}
568	else	845	else
569	ev_periodic_stop (w); /* nonrepeating: stop timer */	846	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
570		847
571	event ((W)w, EV_TIMEOUT);	848	event (EV_A_ (W)w, EV_PERIODIC);
572	}	849	}
573	}	850	}
574		851
575	static void	852	static void
576	periodics_reschedule (ev_tstamp diff)	853	periodics_reschedule (EV_P)
577	{	854	{
578	int i;	855	int i;
579		856
580	/* adjust periodics after time jump */	857	/* adjust periodics after time jump */
581	for (i = 0; i < periodiccnt; ++i)	858	for (i = 0; i < periodiccnt; ++i)
582	{	859	{
583	struct ev_periodic *w = periodics [i];	860	struct ev_periodic *w = periodics [i];
584		861
585	if (w->interval)	862	if (w->interval)
586	{	863	{
587	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	864	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
588		865
589	if (fabs (diff) >= 1e-4)	866	if (fabs (diff) >= 1e-4)
590	{	867	{
591	ev_periodic_stop (w);	868	ev_periodic_stop (EV_A_ w);
592	ev_periodic_start (w);	869	ev_periodic_start (EV_A_ w);
593		870
594	i = 0; /* restart loop, inefficient, but time jumps should be rare */	871	i = 0; /* restart loop, inefficient, but time jumps should be rare */
595	}	872	}
596	}	873	}
597	}	874	}
598	}	875	}
599		876
		877	inline int
		878	time_update_monotonic (EV_P)
		879	{
		880	mn_now = get_clock ();
		881
		882	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		883	{
		884	rt_now = rtmn_diff + mn_now;
		885	return 0;
		886	}
		887	else
		888	{
		889	now_floor = mn_now;
		890	rt_now = ev_time ();
		891	return 1;
		892	}
		893	}
		894
600	static void	895	static void
601	time_update (void)	896	time_update (EV_P)
602	{	897	{
603	int i;	898	int i;
604		899
605	ev_now = ev_time ();	900	#if EV_USE_MONOTONIC
606
607	if (have_monotonic)	901	if (expect_true (have_monotonic))
608	{	902	{
609	ev_tstamp odiff = diff;	903	if (time_update_monotonic (EV_A))
610
611	for (i = 4; --i; ) /* loop a few times, before making important decisions */
612	{	904	{
613	now = get_clock ();	905	ev_tstamp odiff = rtmn_diff;
		906
		907	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		908	{
614	diff = ev_now - now;	909	rtmn_diff = rt_now - mn_now;
615		910
616	if (fabs (odiff - diff) < MIN_TIMEJUMP)	911	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
617	return; /* all is well */	912	return; /* all is well */
618		913
619	ev_now = ev_time ();	914	rt_now = ev_time ();
		915	mn_now = get_clock ();
		916	now_floor = mn_now;
		917	}
		918
		919	periodics_reschedule (EV_A);
		920	/* no timer adjustment, as the monotonic clock doesn't jump */
		921	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
620	}	922	}
621
622	periodics_reschedule (diff - odiff);
623	/* no timer adjustment, as the monotonic clock doesn't jump */
624	}	923	}
625	else	924	else
		925	#endif
626	{	926	{
627	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	927	rt_now = ev_time ();
		928
		929	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
628	{	930	{
629	periodics_reschedule (ev_now - now);	931	periodics_reschedule (EV_A);
630		932
631	/* adjust timers. this is easy, as the offset is the same for all */	933	/* adjust timers. this is easy, as the offset is the same for all */
632	for (i = 0; i < timercnt; ++i)	934	for (i = 0; i < timercnt; ++i)
633	timers [i]->at += diff;	935	timers [i]->at += rt_now - mn_now;
634	}	936	}
635		937
636	now = ev_now;	938	mn_now = rt_now;
637	}	939	}
638	}	940	}
639		941
640	int ev_loop_done;	942	void
		943	ev_ref (EV_P)
		944	{
		945	++activecnt;
		946	}
641		947
		948	void
		949	ev_unref (EV_P)
		950	{
		951	--activecnt;
		952	}
		953
		954	static int loop_done;
		955
		956	void
642	void ev_loop (int flags)	957	ev_loop (EV_P_ int flags)
643	{	958	{
644	double block;	959	double block;
645	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	960	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
646		961
647	do	962	do
648	{	963	{
649	/* queue check watchers (and execute them) */	964	/* queue check watchers (and execute them) */
650	if (preparecnt)	965	if (expect_false (preparecnt))
651	{	966	{
652	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	967	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
653	call_pending ();	968	call_pending (EV_A);
654	}	969	}
655		970
656	/* update fd-related kernel structures */	971	/* update fd-related kernel structures */
657	fd_reify ();	972	fd_reify (EV_A);
658		973
659	/* calculate blocking time */	974	/* calculate blocking time */
660		975
661	/* we only need this for !monotonic clockor timers, but as we basically	976	/* we only need this for !monotonic clockor timers, but as we basically
662	always have timers, we just calculate it always */	977	always have timers, we just calculate it always */
		978	#if EV_USE_MONOTONIC
		979	if (expect_true (have_monotonic))
		980	time_update_monotonic (EV_A);
		981	else
		982	#endif
		983	{
663	ev_now = ev_time ();	984	rt_now = ev_time ();
		985	mn_now = rt_now;
		986	}
664		987
665	if (flags & EVLOOP_NONBLOCK || idlecnt)	988	if (flags & EVLOOP_NONBLOCK || idlecnt)
666	block = 0.;	989	block = 0.;
667	else	990	else
668	{	991	{
669	block = MAX_BLOCKTIME;	992	block = MAX_BLOCKTIME;
670		993
671	if (timercnt)	994	if (timercnt)
672	{	995	{
673	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	996	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
674	if (block > to) block = to;	997	if (block > to) block = to;
675	}	998	}
676		999
677	if (periodiccnt)	1000	if (periodiccnt)
678	{	1001	{
679	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1002	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
680	if (block > to) block = to;	1003	if (block > to) block = to;
681	}	1004	}
682		1005
683	if (block < 0.) block = 0.;	1006	if (block < 0.) block = 0.;
684	}	1007	}
685		1008
686	method_poll (block);	1009	method_poll (EV_A_ block);
687		1010
688	/* update ev_now, do magic */	1011	/* update rt_now, do magic */
689	time_update ();	1012	time_update (EV_A);
690		1013
691	/* queue pending timers and reschedule them */	1014	/* queue pending timers and reschedule them */
692	timers_reify (); /* relative timers called last */	1015	timers_reify (EV_A); /* relative timers called last */
693	periodics_reify (); /* absolute timers called first */	1016	periodics_reify (EV_A); /* absolute timers called first */
694		1017
695	/* queue idle watchers unless io or timers are pending */	1018	/* queue idle watchers unless io or timers are pending */
696	if (!pendingcnt)	1019	if (!pendingcnt)
697	queue_events ((W *)idles, idlecnt, EV_IDLE);	1020	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
698		1021
699	/* queue check watchers, to be executed first */	1022	/* queue check watchers, to be executed first */
700	if (checkcnt)	1023	if (checkcnt)
701	queue_events ((W *)checks, checkcnt, EV_CHECK);	1024	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
702		1025
703	call_pending ();	1026	call_pending (EV_A);
704	}	1027	}
705	while (!ev_loop_done);	1028	while (activecnt && !loop_done);
706		1029
707	if (ev_loop_done != 2)	1030	if (loop_done != 2)
708	ev_loop_done = 0;	1031	loop_done = 0;
		1032	}
		1033
		1034	void
		1035	ev_unloop (EV_P_ int how)
		1036	{
		1037	loop_done = how;
709	}	1038	}
710		1039
711	/*****************************************************************************/	1040	/*****************************************************************************/
712		1041
713	static void	1042	inline void
714	wlist_add (WL *head, WL elem)	1043	wlist_add (WL *head, WL elem)
715	{	1044	{
716	elem->next = *head;	1045	elem->next = *head;
717	*head = elem;	1046	*head = elem;
718	}	1047	}
719		1048
720	static void	1049	inline void
721	wlist_del (WL *head, WL elem)	1050	wlist_del (WL *head, WL elem)
722	{	1051	{
723	while (*head)	1052	while (*head)
724	{	1053	{
725	if (*head == elem)	1054	if (*head == elem)
…		…
730		1059
731	head = &(*head)->next;	1060	head = &(*head)->next;
732	}	1061	}
733	}	1062	}
734		1063
735	static void	1064	inline void
736	ev_clear (W w)	1065	ev_clear_pending (EV_P_ W w)
737	{	1066	{
738	if (w->pending)	1067	if (w->pending)
739	{	1068	{
740	pendings [w->pending - 1].w = 0;	1069	pendings [ABSPRI (w)][w->pending - 1].w = 0;
741	w->pending = 0;	1070	w->pending = 0;
742	}	1071	}
743	}	1072	}
744		1073
745	static void	1074	inline void
746	ev_start (W w, int active)	1075	ev_start (EV_P_ W w, int active)
747	{	1076	{
		1077	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1078	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1079
748	w->active = active;	1080	w->active = active;
		1081	ev_ref (EV_A);
749	}	1082	}
750		1083
751	static void	1084	inline void
752	ev_stop (W w)	1085	ev_stop (EV_P_ W w)
753	{	1086	{
		1087	ev_unref (EV_A);
754	w->active = 0;	1088	w->active = 0;
755	}	1089	}
756		1090
757	/*****************************************************************************/	1091	/*****************************************************************************/
758		1092
759	void	1093	void
760	ev_io_start (struct ev_io *w)	1094	ev_io_start (EV_P_ struct ev_io *w)
761	{	1095	{
		1096	int fd = w->fd;
		1097
762	if (ev_is_active (w))	1098	if (ev_is_active (w))
763	return;	1099	return;
764		1100
765	int fd = w->fd;	1101	assert (("ev_io_start called with negative fd", fd >= 0));
766		1102
767	ev_start ((W)w, 1);	1103	ev_start (EV_A_ (W)w, 1);
768	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1104	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
769	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1105	wlist_add ((WL *)&anfds[fd].head, (WL)w);
770		1106
771	fd_change (fd);	1107	fd_change (EV_A_ fd);
772	}	1108	}
773		1109
774	void	1110	void
775	ev_io_stop (struct ev_io *w)	1111	ev_io_stop (EV_P_ struct ev_io *w)
776	{	1112	{
777	ev_clear ((W)w);	1113	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1114	if (!ev_is_active (w))
779	return;	1115	return;
780		1116
781	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1117	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
782	ev_stop ((W)w);	1118	ev_stop (EV_A_ (W)w);
783		1119
784	fd_change (w->fd);	1120	fd_change (EV_A_ w->fd);
785	}	1121	}
786		1122
787	void	1123	void
788	ev_timer_start (struct ev_timer *w)	1124	ev_timer_start (EV_P_ struct ev_timer *w)
789	{	1125	{
790	if (ev_is_active (w))	1126	if (ev_is_active (w))
791	return;	1127	return;
792		1128
793	w->at += now;	1129	w->at += mn_now;
794		1130
795	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1131	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
796		1132
797	ev_start ((W)w, ++timercnt);	1133	ev_start (EV_A_ (W)w, ++timercnt);
798	array_needsize (timers, timermax, timercnt, );	1134	array_needsize (timers, timermax, timercnt, );
799	timers [timercnt - 1] = w;	1135	timers [timercnt - 1] = w;
800	upheap ((WT *)timers, timercnt - 1);	1136	upheap ((WT *)timers, timercnt - 1);
801	}
802		1137
		1138	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1139	}
		1140
803	void	1141	void
804	ev_timer_stop (struct ev_timer *w)	1142	ev_timer_stop (EV_P_ struct ev_timer *w)
805	{	1143	{
806	ev_clear ((W)w);	1144	ev_clear_pending (EV_A_ (W)w);
807	if (!ev_is_active (w))	1145	if (!ev_is_active (w))
808	return;	1146	return;
809		1147
		1148	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1149
810	if (w->active < timercnt--)	1150	if (((W)w)->active < timercnt--)
811	{	1151	{
812	timers [w->active - 1] = timers [timercnt];	1152	timers [((W)w)->active - 1] = timers [timercnt];
813	downheap ((WT *)timers, timercnt, w->active - 1);	1153	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
814	}	1154	}
815		1155
816	w->at = w->repeat;	1156	w->at = w->repeat;
817		1157
818	ev_stop ((W)w);	1158	ev_stop (EV_A_ (W)w);
819	}	1159	}
820		1160
821	void	1161	void
822	ev_timer_again (struct ev_timer *w)	1162	ev_timer_again (EV_P_ struct ev_timer *w)
823	{	1163	{
824	if (ev_is_active (w))	1164	if (ev_is_active (w))
825	{	1165	{
826	if (w->repeat)	1166	if (w->repeat)
827	{	1167	{
828	w->at = now + w->repeat;	1168	w->at = mn_now + w->repeat;
829	downheap ((WT *)timers, timercnt, w->active - 1);	1169	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
830	}	1170	}
831	else	1171	else
832	ev_timer_stop (w);	1172	ev_timer_stop (EV_A_ w);
833	}	1173	}
834	else if (w->repeat)	1174	else if (w->repeat)
835	ev_timer_start (w);	1175	ev_timer_start (EV_A_ w);
836	}	1176	}
837		1177
838	void	1178	void
839	ev_periodic_start (struct ev_periodic *w)	1179	ev_periodic_start (EV_P_ struct ev_periodic *w)
840	{	1180	{
841	if (ev_is_active (w))	1181	if (ev_is_active (w))
842	return;	1182	return;
843		1183
844	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1184	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
845		1185
846	/* this formula differs from the one in periodic_reify because we do not always round up */	1186	/* this formula differs from the one in periodic_reify because we do not always round up */
847	if (w->interval)	1187	if (w->interval)
848	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1188	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
849		1189
850	ev_start ((W)w, ++periodiccnt);	1190	ev_start (EV_A_ (W)w, ++periodiccnt);
851	array_needsize (periodics, periodicmax, periodiccnt, );	1191	array_needsize (periodics, periodicmax, periodiccnt, );
852	periodics [periodiccnt - 1] = w;	1192	periodics [periodiccnt - 1] = w;
853	upheap ((WT *)periodics, periodiccnt - 1);	1193	upheap ((WT *)periodics, periodiccnt - 1);
854	}
855		1194
		1195	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1196	}
		1197
856	void	1198	void
857	ev_periodic_stop (struct ev_periodic *w)	1199	ev_periodic_stop (EV_P_ struct ev_periodic *w)
858	{	1200	{
859	ev_clear ((W)w);	1201	ev_clear_pending (EV_A_ (W)w);
860	if (!ev_is_active (w))	1202	if (!ev_is_active (w))
861	return;	1203	return;
862		1204
		1205	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1206
863	if (w->active < periodiccnt--)	1207	if (((W)w)->active < periodiccnt--)
864	{	1208	{
865	periodics [w->active - 1] = periodics [periodiccnt];	1209	periodics [((W)w)->active - 1] = periodics [periodiccnt];
866	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1210	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
867	}	1211	}
868		1212
869	ev_stop ((W)w);	1213	ev_stop (EV_A_ (W)w);
870	}	1214	}
871		1215
872	void	1216	void
873	ev_signal_start (struct ev_signal *w)	1217	ev_idle_start (EV_P_ struct ev_idle *w)
874	{	1218	{
875	if (ev_is_active (w))	1219	if (ev_is_active (w))
876	return;	1220	return;
877		1221
		1222	ev_start (EV_A_ (W)w, ++idlecnt);
		1223	array_needsize (idles, idlemax, idlecnt, );
		1224	idles [idlecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_idle_stop (EV_P_ struct ev_idle *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	idles [((W)w)->active - 1] = idles [--idlecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++preparecnt);
		1245	array_needsize (prepares, preparemax, preparecnt, );
		1246	prepares [preparecnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	void
		1261	ev_check_start (EV_P_ struct ev_check *w)
		1262	{
		1263	if (ev_is_active (w))
		1264	return;
		1265
		1266	ev_start (EV_A_ (W)w, ++checkcnt);
		1267	array_needsize (checks, checkmax, checkcnt, );
		1268	checks [checkcnt - 1] = w;
		1269	}
		1270
		1271	void
		1272	ev_check_stop (EV_P_ struct ev_check *w)
		1273	{
		1274	ev_clear_pending (EV_A_ (W)w);
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	checks [((W)w)->active - 1] = checks [--checkcnt];
		1279	ev_stop (EV_A_ (W)w);
		1280	}
		1281
		1282	#ifndef SA_RESTART
		1283	# define SA_RESTART 0
		1284	#endif
		1285
		1286	void
		1287	ev_signal_start (EV_P_ struct ev_signal *w)
		1288	{
		1289	#if EV_MULTIPLICITY
		1290	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1291	#endif
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1296
878	ev_start ((W)w, 1);	1297	ev_start (EV_A_ (W)w, 1);
879	array_needsize (signals, signalmax, w->signum, signals_init);	1298	array_needsize (signals, signalmax, w->signum, signals_init);
880	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1299	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
881		1300
882	if (!w->next)	1301	if (!w->next)
883	{	1302	{
884	struct sigaction sa;	1303	struct sigaction sa;
885	sa.sa_handler = sighandler;	1304	sa.sa_handler = sighandler;
886	sigfillset (&sa.sa_mask);	1305	sigfillset (&sa.sa_mask);
887	sa.sa_flags = 0;	1306	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
888	sigaction (w->signum, &sa, 0);	1307	sigaction (w->signum, &sa, 0);
889	}	1308	}
890	}	1309	}
891		1310
892	void	1311	void
893	ev_signal_stop (struct ev_signal *w)	1312	ev_signal_stop (EV_P_ struct ev_signal *w)
894	{	1313	{
895	ev_clear ((W)w);	1314	ev_clear_pending (EV_A_ (W)w);
896	if (!ev_is_active (w))	1315	if (!ev_is_active (w))
897	return;	1316	return;
898		1317
899	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1318	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
900	ev_stop ((W)w);	1319	ev_stop (EV_A_ (W)w);
901		1320
902	if (!signals [w->signum - 1].head)	1321	if (!signals [w->signum - 1].head)
903	signal (w->signum, SIG_DFL);	1322	signal (w->signum, SIG_DFL);
904	}	1323	}
905		1324
906	void	1325	void
907	ev_idle_start (struct ev_idle *w)	1326	ev_child_start (EV_P_ struct ev_child *w)
908	{	1327	{
		1328	#if EV_MULTIPLICITY
		1329	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1330	#endif
909	if (ev_is_active (w))	1331	if (ev_is_active (w))
910	return;	1332	return;
911		1333
912	ev_start ((W)w, ++idlecnt);	1334	ev_start (EV_A_ (W)w, 1);
913	array_needsize (idles, idlemax, idlecnt, );	1335	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
914	idles [idlecnt - 1] = w;
915	}	1336	}
916		1337
917	void	1338	void
918	ev_idle_stop (struct ev_idle *w)	1339	ev_child_stop (EV_P_ struct ev_child *w)
919	{	1340	{
920	ev_clear ((W)w);	1341	ev_clear_pending (EV_A_ (W)w);
921	if (ev_is_active (w))	1342	if (ev_is_active (w))
922	return;	1343	return;
923		1344
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);	1345	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	1346	ev_stop (EV_A_ (W)w);
991	}	1347	}
992		1348
993	/*****************************************************************************/	1349	/*****************************************************************************/
994		1350
995	struct ev_once	1351	struct ev_once
…		…
999	void (*cb)(int revents, void *arg);	1355	void (*cb)(int revents, void *arg);
1000	void *arg;	1356	void *arg;
1001	};	1357	};
1002		1358
1003	static void	1359	static void
1004	once_cb (struct ev_once *once, int revents)	1360	once_cb (EV_P_ struct ev_once *once, int revents)
1005	{	1361	{
1006	void (*cb)(int revents, void *arg) = once->cb;	1362	void (*cb)(int revents, void *arg) = once->cb;
1007	void *arg = once->arg;	1363	void *arg = once->arg;
1008		1364
1009	ev_io_stop (&once->io);	1365	ev_io_stop (EV_A_ &once->io);
1010	ev_timer_stop (&once->to);	1366	ev_timer_stop (EV_A_ &once->to);
1011	free (once);	1367	free (once);
1012		1368
1013	cb (revents, arg);	1369	cb (revents, arg);
1014	}	1370	}
1015		1371
1016	static void	1372	static void
1017	once_cb_io (struct ev_io *w, int revents)	1373	once_cb_io (EV_P_ struct ev_io *w, int revents)
1018	{	1374	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1375	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1020	}	1376	}
1021		1377
1022	static void	1378	static void
1023	once_cb_to (struct ev_timer *w, int revents)	1379	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1024	{	1380	{
1025	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1381	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1026	}	1382	}
1027		1383
1028	void	1384	void
1029	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1385	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1030	{	1386	{
1031	struct ev_once *once = malloc (sizeof (struct ev_once));	1387	struct ev_once *once = malloc (sizeof (struct ev_once));
1032		1388
1033	if (!once)	1389	if (!once)
1034	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1390	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1039		1395
1040	ev_watcher_init (&once->io, once_cb_io);	1396	ev_watcher_init (&once->io, once_cb_io);
1041	if (fd >= 0)	1397	if (fd >= 0)
1042	{	1398	{
1043	ev_io_set (&once->io, fd, events);	1399	ev_io_set (&once->io, fd, events);
1044	ev_io_start (&once->io);	1400	ev_io_start (EV_A_ &once->io);
1045	}	1401	}
1046		1402
1047	ev_watcher_init (&once->to, once_cb_to);	1403	ev_watcher_init (&once->to, once_cb_to);
1048	if (timeout >= 0.)	1404	if (timeout >= 0.)
1049	{	1405	{
1050	ev_timer_set (&once->to, timeout, 0.);	1406	ev_timer_set (&once->to, timeout, 0.);
1051	ev_timer_start (&once->to);	1407	ev_timer_start (EV_A_ &once->to);
1052	}	1408	}
1053	}	1409	}
1054	}	1410	}
1055		1411
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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