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Comparing libev/ev.c (file contents):
Revision 1.26 by root, Wed Oct 31 21:50:15 2007 UTC vs.
Revision 1.63 by root, Sun Nov 4 22:03:17 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
49	# endif	102	# endif
50	#endif	103	#endif
51		104
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#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	/**/
63		122
64	#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) */
65	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	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 */
67		127
68	#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)
69		143
70	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
73		147
74	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77
78	static int have_monotonic; /* runtime */
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		149
84	/*****************************************************************************/	150	/*****************************************************************************/
85		151
86	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
87	ev_time (void)	186	ev_time (void)
88	{	187	{
89	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
90	struct timespec ts;	189	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	192	#else
94	struct timeval tv;	193	struct timeval tv;
95	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	196	#endif
98	}	197	}
99		198
100	static ev_tstamp	199	inline ev_tstamp
101	get_clock (void)	200	get_clock (void)
102	{	201	{
103	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
104	if (have_monotonic)	203	if (expect_true (have_monotonic))
105	{	204	{
106	struct timespec ts;	205	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	208	}
110	#endif	209	#endif
111		210
112	return ev_time ();	211	return ev_time ();
113	}	212	}
114		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) | 4 & ~3)
		221
115	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
117	{ \	224	{ \
118	int newcnt = cur; \	225	int newcnt = cur; \
119	do \	226	do \
120	{ \	227	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	228	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	229	} \
123	while ((cnt) > newcnt); \	230	while ((cnt) > newcnt); \
124	\	231	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	232	base = realloc (base, sizeof (*base) * (newcnt)); \
126	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	234	cur = newcnt; \
128	}	235	}
129		236
130	/*****************************************************************************/	237	/*****************************************************************************/
131		238
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	239	static void
145	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
146	{	241	{
147	while (count--)	242	while (count--)
148	{	243	{
149	base->head = 0;	244	base->head = 0;
150	base->wev = base->rev = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
151	++base;	248	++base;
152	}	249	}
153	}	250	}
154		251
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	252	static void
165	event (W w, int events)	253	event (EV_P_ W w, int events)
166	{	254	{
167	if (w->active)	255	if (w->pending)
168	{	256	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	257	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		258	return;
173	}	259	}
174	}
175		260
		261	w->pending = ++pendingcnt [ABSPRI (w)];
		262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		263	pendings [ABSPRI (w)][w->pending - 1].w = w;
		264	pendings [ABSPRI (w)][w->pending - 1].events = events;
		265	}
		266
176	static void	267	static void
		268	queue_events (EV_P_ W *events, int eventcnt, int type)
		269	{
		270	int i;
		271
		272	for (i = 0; i < eventcnt; ++i)
		273	event (EV_A_ events [i], type);
		274	}
		275
		276	static void
177	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
178	{	278	{
179	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	280	struct ev_io *w;
181		281
182	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
183	{	283	{
184	int ev = w->events & events;	284	int ev = w->events & events;
185		285
186	if (ev)	286	if (ev)
187	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
188	}	288	}
189	}	289	}
190		290
		291	/*****************************************************************************/
		292
191	static void	293	static void
192	queue_events (W *events, int eventcnt, int type)	294	fd_reify (EV_P)
193	{	295	{
194	int i;	296	int i;
195		297
196	for (i = 0; i < eventcnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	299	{
		300	int fd = fdchanges [i];
		301	ANFD *anfd = anfds + fd;
		302	struct ev_io *w;
		303
		304	int events = 0;
		305
		306	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		307	events |= w->events;
		308
		309	anfd->reify = 0;
		310
		311	if (anfd->events != events)
		312	{
		313	method_modify (EV_A_ fd, anfd->events, events);
		314	anfd->events = events;
		315	}
		316	}
		317
		318	fdchangecnt = 0;
		319	}
		320
		321	static void
		322	fd_change (EV_P_ int fd)
		323	{
		324	if (anfds [fd].reify || fdchangecnt < 0)
		325	return;
		326
		327	anfds [fd].reify = 1;
		328
		329	++fdchangecnt;
		330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		331	fdchanges [fdchangecnt - 1] = fd;
		332	}
		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	}
198	}	344	}
199		345
200	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
201	static void	347	static void
202	fd_recheck (void)	348	fd_ebadf (EV_P)
203	{	349	{
204	int fd;	350	int fd;
205		351
206	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	353	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	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)
210	{	366	{
211	event ((W)anfds [fd].head, EV_ERROR);	367	close (fd);
212	evio_stop (anfds [fd].head);	368	fd_kill (EV_A_ fd);
		369	return;
213	}	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	}
214	}	386	}
215		387
216	/*****************************************************************************/	388	/*****************************************************************************/
217		389
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void	390	static void
225	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
226	{	392	{
227	WT w = timers [k];	393	WT w = heap [k];
228		394
229	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
230	{	396	{
231	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
232	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
233	k >>= 1;	399	k >>= 1;
234	}	400	}
235		401
236	timers [k] = w;	402	heap [k] = w;
237	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
238		404
239	}	405	}
240		406
241	static void	407	static void
242	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
243	{	409	{
244	WT w = timers [k];	410	WT w = heap [k];
245		411
246	while (k < (N >> 1))	412	while (k < (N >> 1))
247	{	413	{
248	int j = k << 1;	414	int j = k << 1;
249		415
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
251	++j;	417	++j;
252		418
253	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
254	break;	420	break;
255		421
256	timers [k] = timers [j];	422	heap [k] = heap [j];
257	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
258	k = j;	424	k = j;
259	}	425	}
260		426
261	timers [k] = w;	427	heap [k] = w;
262	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
263	}	429	}
264		430
265	/*****************************************************************************/	431	/*****************************************************************************/
266		432
267	typedef struct	433	typedef struct
268	{	434	{
269	struct ev_signal *head;	435	struct ev_watcher_list *head;
270	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
271	} ANSIG;	437	} ANSIG;
272		438
273	static ANSIG *signals;	439	static ANSIG *signals;
274	static int signalmax;	440	static int signalmax;
275		441
276	static int sigpipe [2];	442	static int sigpipe [2];
277	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	444	static struct ev_io sigev;
279		445
280	static void	446	static void
281	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
282	{	448	{
283	while (count--)	449	while (count--)
284	{	450	{
285	base->head = 0;	451	base->head = 0;
286	base->gotsig = 0;	452	base->gotsig = 0;
		453
287	++base;	454	++base;
288	}	455	}
289	}	456	}
290		457
291	static void	458	static void
…		…
293	{	460	{
294	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
295		462
296	if (!gotsig)	463	if (!gotsig)
297	{	464	{
		465	int old_errno = errno;
298	gotsig = 1;	466	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
300	}	469	}
301	}	470	}
302		471
303	static void	472	static void
304	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	474	{
306	struct ev_signal *w;	475	struct ev_watcher_list *w;
307	int sig;	476	int signum;
308		477
		478	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	479	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		480
312	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
314	{	483	{
315	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
316		485
317	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
319	}	488	}
320	}	489	}
321		490
322	static void	491	static void
323	siginit (void)	492	siginit (EV_P)
324	{	493	{
		494	#ifndef WIN32
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327		497
328	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
331		502
332	evio_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	506	}
335		507
336	/*****************************************************************************/	508	/*****************************************************************************/
337		509
338	static struct ev_idle **idles;	510	#ifndef WIN32
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348		511
349	static struct ev_child *childs [PID_HASHSIZE];	512	static struct ev_child *childs [PID_HASHSIZE];
350	static struct ev_signal childev;	513	static struct ev_signal childev;
351		514
352	#ifndef WCONTINUED	515	#ifndef WCONTINUED
353	# define WCONTINUED 0	516	# define WCONTINUED 0
354	#endif	517	#endif
355		518
356	static void	519	static void
357	childcb (struct ev_signal *sw, int revents)	520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	521	{
359	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	ev_priority (w) = ev_priority (sw); /* 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	{
360	int pid, status;	537	int pid, status;
361		538
362	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	540	{
364	if (w->pid == pid || w->pid == -1)	541	/* make sure we are called again until all childs have been reaped */
365	{	542	event (EV_A_ (W)sw, EV_SIGNAL);
366	w->status = status;	543
367	event ((W)w, EV_CHILD);	544	child_reap (EV_A_ sw, pid, pid, status);
368	}	545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
369	}	547	}
		548
		549	#endif
370		550
371	/*****************************************************************************/	551	/*****************************************************************************/
372		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
373	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	557	# include "ev_epoll.c"
375	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
376	#if HAVE_SELECT	562	#if EV_USE_SELECT
377	# include "ev_select.c"	563	# include "ev_select.c"
378	#endif	564	#endif
379		565
380	int	566	int
381	ev_version_major (void)	567	ev_version_major (void)
…		…
387	ev_version_minor (void)	573	ev_version_minor (void)
388	{	574	{
389	return EV_VERSION_MINOR;	575	return EV_VERSION_MINOR;
390	}	576	}
391		577
392	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)
393	{	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	{
394	if (!ev_method)	599	if (!method)
395	{	600	{
396	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
397	{	602	{
398	struct timespec ts;	603	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	605	have_monotonic = 1;
401	}	606	}
402	#endif	607	#endif
403		608
404	ev_now = ev_time ();	609	rt_now = ev_time ();
405	now = get_clock ();	610	mn_now = get_clock ();
		611	now_floor = mn_now;
406	diff = ev_now - now;	612	rtmn_diff = rt_now - mn_now;
407		613
		614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
		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
		627	#if EV_USE_EPOLL
		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);
		632	#endif
		633	#if EV_USE_SELECT
		634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		635	#endif
		636	}
		637	}
		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])
408	if (pipe (sigpipe))	716	if (pipe (sigpipe))
409	return 0;	717	return 0;
410		718
411	ev_method = EVMETHOD_NONE;	719	if (!default_loop)
412	#if HAVE_EPOLL	720	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	721	#if EV_MULTIPLICITY
		722	struct ev_loop *loop = default_loop = &default_loop_struct;
		723	#else
		724	default_loop = 1;
414	#endif	725	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		726
		727	loop_init (EV_A_ methods);
		728
419	if (ev_method)	729	if (ev_method (EV_A))
420	{	730	{
421	evw_init (&sigev, sigcb);	731	ev_watcher_init (&sigev, sigcb);
		732	ev_set_priority (&sigev, EV_MAXPRI);
422	siginit ();	733	siginit (EV_A);
423		734
		735	#ifndef WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	736	ev_signal_init (&childev, childcb, SIGCHLD);
		737	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	738	ev_signal_start (EV_A_ &childev);
		739	ev_unref (EV_A); /* child watcher should not keep loop alive */
		740	#endif
426	}	741	}
		742	else
		743	default_loop = 0;
427	}	744	}
428		745
429	return ev_method;	746	return default_loop;
430	}	747	}
431		748
432	/*****************************************************************************/
433
434	void	749	void
435	ev_prefork (void)	750	ev_default_destroy (void)
436	{	751	{
437	/* nop */	752	#if EV_MULTIPLICITY
438	}	753	struct ev_loop *loop = default_loop;
439
440	void
441	ev_postfork_parent (void)
442	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif	754	#endif
453		755
		756	ev_ref (EV_A); /* child watcher */
		757	ev_signal_stop (EV_A_ &childev);
		758
		759	ev_ref (EV_A); /* signal watcher */
454	evio_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);
455	close (sigpipe [0]);	778	close (sigpipe [0]);
456	close (sigpipe [1]);	779	close (sigpipe [1]);
457	pipe (sigpipe);	780	pipe (sigpipe);
		781
		782	ev_ref (EV_A); /* signal watcher */
458	siginit ();	783	siginit (EV_A);
459	}	784	}
460		785
461	/*****************************************************************************/	786	/*****************************************************************************/
462		787
463	static void	788	static void
464	fd_reify (void)	789	call_pending (EV_P)
465	{	790	{
466	int i;	791	int pri;
467		792
468	for (i = 0; i < fdchangecnt; ++i)	793	for (pri = NUMPRI; pri--; )
469	{	794	while (pendingcnt [pri])
470	int fd = fdchanges [i];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473
474	int wev = 0;
475
476	for (w = anfd->head; w; w = w->next)
477	wev |= w->events;
478
479	if (anfd->wev != wev)
480	{	795	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;	796	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
495		797
496	if (p->w)	798	if (p->w)
497	{	799	{
498	p->w->pending = 0;	800	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	801
		802	(*(void (**)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
500	}	803	}
501	}	804	}
502	}	805	}
503		806
504	static void	807	static void
505	timers_reify (void)	808	timers_reify (EV_P)
506	{	809	{
507	while (timercnt && timers [0]->at <= now)	810	while (timercnt && ((WT)timers [0])->at <= mn_now)
508	{	811	{
509	struct ev_timer *w = timers [0];	812	struct ev_timer *w = timers [0];
510		813
511	event ((W)w, EV_TIMEOUT);	814	assert (("inactive timer on timer heap detected", ev_is_active (w)));
512		815
513	/* first reschedule or stop timer */	816	/* first reschedule or stop timer */
514	if (w->repeat)	817	if (w->repeat)
515	{	818	{
		819	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
516	w->at = now + w->repeat;	820	((WT)w)->at = mn_now + w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));
518	downheap ((WT *)timers, timercnt, 0);	821	downheap ((WT *)timers, timercnt, 0);
519	}	822	}
520	else	823	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	824	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		825
		826	event (EV_A_ (W)w, EV_TIMEOUT);
		827	}
		828	}
		829
525	static void	830	static void
526	periodics_reify (void)	831	periodics_reify (EV_P)
527	{	832	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	833	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
529	{	834	{
530	struct ev_periodic *w = periodics [0];	835	struct ev_periodic *w = periodics [0];
		836
		837	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
531		838
532	/* first reschedule or stop timer */	839	/* first reschedule or stop timer */
533	if (w->interval)	840	if (w->interval)
534	{	841	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	842	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	843	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	844	downheap ((WT *)periodics, periodiccnt, 0);
538	}	845	}
539	else	846	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	847	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		848
542	event ((W)w, EV_TIMEOUT);	849	event (EV_A_ (W)w, EV_PERIODIC);
543	}	850	}
544	}	851	}
545		852
546	static void	853	static void
547	periodics_reschedule (ev_tstamp diff)	854	periodics_reschedule (EV_P)
548	{	855	{
549	int i;	856	int i;
550		857
551	/* adjust periodics after time jump */	858	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	859	for (i = 0; i < periodiccnt; ++i)
553	{	860	{
554	struct ev_periodic *w = periodics [i];	861	struct ev_periodic *w = periodics [i];
555		862
556	if (w->interval)	863	if (w->interval)
557	{	864	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	865	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
559		866
560	if (fabs (diff) >= 1e-4)	867	if (fabs (diff) >= 1e-4)
561	{	868	{
562	evperiodic_stop (w);	869	ev_periodic_stop (EV_A_ w);
563	evperiodic_start (w);	870	ev_periodic_start (EV_A_ w);
564		871
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	872	i = 0; /* restart loop, inefficient, but time jumps should be rare */
566	}	873	}
567	}	874	}
568	}	875	}
569	}	876	}
570		877
		878	inline int
		879	time_update_monotonic (EV_P)
		880	{
		881	mn_now = get_clock ();
		882
		883	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		884	{
		885	rt_now = rtmn_diff + mn_now;
		886	return 0;
		887	}
		888	else
		889	{
		890	now_floor = mn_now;
		891	rt_now = ev_time ();
		892	return 1;
		893	}
		894	}
		895
571	static void	896	static void
572	time_update (void)	897	time_update (EV_P)
573	{	898	{
574	int i;	899	int i;
575		900
576	ev_now = ev_time ();	901	#if EV_USE_MONOTONIC
577
578	if (have_monotonic)	902	if (expect_true (have_monotonic))
579	{	903	{
580	ev_tstamp odiff = diff;	904	if (time_update_monotonic (EV_A))
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	905	{
584	now = get_clock ();	906	ev_tstamp odiff = rtmn_diff;
		907
		908	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		909	{
585	diff = ev_now - now;	910	rtmn_diff = rt_now - mn_now;
586		911
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)	912	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
588	return; /* all is well */	913	return; /* all is well */
589		914
590	ev_now = ev_time ();	915	rt_now = ev_time ();
		916	mn_now = get_clock ();
		917	now_floor = mn_now;
		918	}
		919
		920	periodics_reschedule (EV_A);
		921	/* no timer adjustment, as the monotonic clock doesn't jump */
		922	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
591	}	923	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}	924	}
596	else	925	else
		926	#endif
597	{	927	{
598	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	928	rt_now = ev_time ();
		929
		930	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
599	{	931	{
600	periodics_reschedule (ev_now - now);	932	periodics_reschedule (EV_A);
601		933
602	/* adjust timers. this is easy, as the offset is the same for all */	934	/* adjust timers. this is easy, as the offset is the same for all */
603	for (i = 0; i < timercnt; ++i)	935	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	936	((WT)timers [i])->at += rt_now - mn_now;
605	}	937	}
606		938
607	now = ev_now;	939	mn_now = rt_now;
608	}	940	}
609	}	941	}
610		942
611	int ev_loop_done;	943	void
		944	ev_ref (EV_P)
		945	{
		946	++activecnt;
		947	}
612		948
		949	void
		950	ev_unref (EV_P)
		951	{
		952	--activecnt;
		953	}
		954
		955	static int loop_done;
		956
		957	void
613	void ev_loop (int flags)	958	ev_loop (EV_P_ int flags)
614	{	959	{
615	double block;	960	double block;
616	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	961	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
617		962
618	do	963	do
619	{	964	{
620	/* queue check watchers (and execute them) */	965	/* queue check watchers (and execute them) */
621	if (preparecnt)	966	if (expect_false (preparecnt))
622	{	967	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	968	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	969	call_pending (EV_A);
625	}	970	}
626		971
627	/* update fd-related kernel structures */	972	/* update fd-related kernel structures */
628	fd_reify ();	973	fd_reify (EV_A);
629		974
630	/* calculate blocking time */	975	/* calculate blocking time */
631		976
632	/* we only need this for !monotonic clockor timers, but as we basically	977	/* we only need this for !monotonic clockor timers, but as we basically
633	always have timers, we just calculate it always */	978	always have timers, we just calculate it always */
		979	#if EV_USE_MONOTONIC
		980	if (expect_true (have_monotonic))
		981	time_update_monotonic (EV_A);
		982	else
		983	#endif
		984	{
634	ev_now = ev_time ();	985	rt_now = ev_time ();
		986	mn_now = rt_now;
		987	}
635		988
636	if (flags & EVLOOP_NONBLOCK || idlecnt)	989	if (flags & EVLOOP_NONBLOCK || idlecnt)
637	block = 0.;	990	block = 0.;
638	else	991	else
639	{	992	{
640	block = MAX_BLOCKTIME;	993	block = MAX_BLOCKTIME;
641		994
642	if (timercnt)	995	if (timercnt)
643	{	996	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	997	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
645	if (block > to) block = to;	998	if (block > to) block = to;
646	}	999	}
647		1000
648	if (periodiccnt)	1001	if (periodiccnt)
649	{	1002	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1003	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
651	if (block > to) block = to;	1004	if (block > to) block = to;
652	}	1005	}
653		1006
654	if (block < 0.) block = 0.;	1007	if (block < 0.) block = 0.;
655	}	1008	}
656		1009
657	method_poll (block);	1010	method_poll (EV_A_ block);
658		1011
659	/* update ev_now, do magic */	1012	/* update rt_now, do magic */
660	time_update ();	1013	time_update (EV_A);
661		1014
662	/* queue pending timers and reschedule them */	1015	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1016	timers_reify (EV_A); /* relative timers called last */
664	periodics_reify (); /* absolute timers called first */	1017	periodics_reify (EV_A); /* absolute timers called first */
665		1018
666	/* queue idle watchers unless io or timers are pending */	1019	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	1020	if (!pendingcnt)
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1021	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		1022
670	/* queue check watchers, to be executed first */	1023	/* queue check watchers, to be executed first */
671	if (checkcnt)	1024	if (checkcnt)
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1025	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1026
674	call_pending ();	1027	call_pending (EV_A);
675	}	1028	}
676	while (!ev_loop_done);	1029	while (activecnt && !loop_done);
677		1030
678	if (ev_loop_done != 2)	1031	if (loop_done != 2)
679	ev_loop_done = 0;	1032	loop_done = 0;
		1033	}
		1034
		1035	void
		1036	ev_unloop (EV_P_ int how)
		1037	{
		1038	loop_done = how;
680	}	1039	}
681		1040
682	/*****************************************************************************/	1041	/*****************************************************************************/
683		1042
684	static void	1043	inline void
685	wlist_add (WL *head, WL elem)	1044	wlist_add (WL *head, WL elem)
686	{	1045	{
687	elem->next = *head;	1046	elem->next = *head;
688	*head = elem;	1047	*head = elem;
689	}	1048	}
690		1049
691	static void	1050	inline void
692	wlist_del (WL *head, WL elem)	1051	wlist_del (WL *head, WL elem)
693	{	1052	{
694	while (*head)	1053	while (*head)
695	{	1054	{
696	if (*head == elem)	1055	if (*head == elem)
…		…
701		1060
702	head = &(*head)->next;	1061	head = &(*head)->next;
703	}	1062	}
704	}	1063	}
705		1064
706	static void	1065	inline void
707	ev_clear (W w)	1066	ev_clear_pending (EV_P_ W w)
708	{	1067	{
709	if (w->pending)	1068	if (w->pending)
710	{	1069	{
711	pendings [w->pending - 1].w = 0;	1070	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1071	w->pending = 0;
713	}	1072	}
714	}	1073	}
715		1074
716	static void	1075	inline void
717	ev_start (W w, int active)	1076	ev_start (EV_P_ W w, int active)
718	{	1077	{
		1078	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1079	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1080
719	w->active = active;	1081	w->active = active;
		1082	ev_ref (EV_A);
720	}	1083	}
721		1084
722	static void	1085	inline void
723	ev_stop (W w)	1086	ev_stop (EV_P_ W w)
724	{	1087	{
		1088	ev_unref (EV_A);
725	w->active = 0;	1089	w->active = 0;
726	}	1090	}
727		1091
728	/*****************************************************************************/	1092	/*****************************************************************************/
729		1093
730	void	1094	void
731	evio_start (struct ev_io *w)	1095	ev_io_start (EV_P_ struct ev_io *w)
732	{	1096	{
		1097	int fd = w->fd;
		1098
733	if (ev_is_active (w))	1099	if (ev_is_active (w))
734	return;	1100	return;
735		1101
736	int fd = w->fd;	1102	assert (("ev_io_start called with negative fd", fd >= 0));
737		1103
738	ev_start ((W)w, 1);	1104	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1105	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1106	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1107
742	++fdchangecnt;	1108	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745
746	if (w->fd == 9)
747	printf ("start %p:%x\n", w, w->events);//D
748	}	1109	}
749		1110
750	void	1111	void
751	evio_stop (struct ev_io *w)	1112	ev_io_stop (EV_P_ struct ev_io *w)
752	{	1113	{
753	if (w->fd == 9)	1114	ev_clear_pending (EV_A_ (W)w);
754	printf ("stop %p:%x\n", w, w->events);//D
755	ev_clear ((W)w);
756	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
757	return;	1116	return;
758		1117
759	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1118	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
760	ev_stop ((W)w);	1119	ev_stop (EV_A_ (W)w);
761		1120
762	++fdchangecnt;	1121	fd_change (EV_A_ w->fd);
763	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764	fdchanges [fdchangecnt - 1] = w->fd;
765	}	1122	}
766		1123
767	void	1124	void
768	evtimer_start (struct ev_timer *w)	1125	ev_timer_start (EV_P_ struct ev_timer *w)
769	{	1126	{
770	if (ev_is_active (w))	1127	if (ev_is_active (w))
771	return;	1128	return;
772		1129
773	w->at += now;	1130	((WT)w)->at += mn_now;
774		1131
775	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1132	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
776		1133
777	ev_start ((W)w, ++timercnt);	1134	ev_start (EV_A_ (W)w, ++timercnt);
778	array_needsize (timers, timermax, timercnt, );	1135	array_needsize (timers, timermax, timercnt, );
779	timers [timercnt - 1] = w;	1136	timers [timercnt - 1] = w;
780	upheap ((WT *)timers, timercnt - 1);	1137	upheap ((WT *)timers, timercnt - 1);
781	}
782		1138
		1139	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1140	}
		1141
783	void	1142	void
784	evtimer_stop (struct ev_timer *w)	1143	ev_timer_stop (EV_P_ struct ev_timer *w)
785	{	1144	{
786	ev_clear ((W)w);	1145	ev_clear_pending (EV_A_ (W)w);
787	if (!ev_is_active (w))	1146	if (!ev_is_active (w))
788	return;	1147	return;
789		1148
		1149	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1150
790	if (w->active < timercnt--)	1151	if (((W)w)->active < timercnt--)
791	{	1152	{
792	timers [w->active - 1] = timers [timercnt];	1153	timers [((W)w)->active - 1] = timers [timercnt];
793	downheap ((WT *)timers, timercnt, w->active - 1);	1154	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
794	}	1155	}
795		1156
796	w->at = w->repeat;	1157	((WT)w)->at = w->repeat;
797		1158
798	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
799	}	1160	}
800		1161
801	void	1162	void
802	evtimer_again (struct ev_timer *w)	1163	ev_timer_again (EV_P_ struct ev_timer *w)
803	{	1164	{
804	if (ev_is_active (w))	1165	if (ev_is_active (w))
805	{	1166	{
806	if (w->repeat)	1167	if (w->repeat)
807	{	1168	{
808	w->at = now + w->repeat;	1169	((WT)w)->at = mn_now + w->repeat;
809	downheap ((WT *)timers, timercnt, w->active - 1);	1170	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
810	}	1171	}
811	else	1172	else
812	evtimer_stop (w);	1173	ev_timer_stop (EV_A_ w);
813	}	1174	}
814	else if (w->repeat)	1175	else if (w->repeat)
815	evtimer_start (w);	1176	ev_timer_start (EV_A_ w);
816	}	1177	}
817		1178
818	void	1179	void
819	evperiodic_start (struct ev_periodic *w)	1180	ev_periodic_start (EV_P_ struct ev_periodic *w)
820	{	1181	{
821	if (ev_is_active (w))	1182	if (ev_is_active (w))
822	return;	1183	return;
823		1184
824	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1185	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
825		1186
826	/* this formula differs from the one in periodic_reify because we do not always round up */	1187	/* this formula differs from the one in periodic_reify because we do not always round up */
827	if (w->interval)	1188	if (w->interval)
828	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1189	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
829		1190
830	ev_start ((W)w, ++periodiccnt);	1191	ev_start (EV_A_ (W)w, ++periodiccnt);
831	array_needsize (periodics, periodicmax, periodiccnt, );	1192	array_needsize (periodics, periodicmax, periodiccnt, );
832	periodics [periodiccnt - 1] = w;	1193	periodics [periodiccnt - 1] = w;
833	upheap ((WT *)periodics, periodiccnt - 1);	1194	upheap ((WT *)periodics, periodiccnt - 1);
834	}
835		1195
		1196	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1197	}
		1198
836	void	1199	void
837	evperiodic_stop (struct ev_periodic *w)	1200	ev_periodic_stop (EV_P_ struct ev_periodic *w)
838	{	1201	{
839	ev_clear ((W)w);	1202	ev_clear_pending (EV_A_ (W)w);
840	if (!ev_is_active (w))	1203	if (!ev_is_active (w))
841	return;	1204	return;
842		1205
		1206	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1207
843	if (w->active < periodiccnt--)	1208	if (((W)w)->active < periodiccnt--)
844	{	1209	{
845	periodics [w->active - 1] = periodics [periodiccnt];	1210	periodics [((W)w)->active - 1] = periodics [periodiccnt];
846	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1211	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
847	}	1212	}
848		1213
849	ev_stop ((W)w);	1214	ev_stop (EV_A_ (W)w);
850	}	1215	}
851		1216
852	void	1217	void
853	evsignal_start (struct ev_signal *w)	1218	ev_idle_start (EV_P_ struct ev_idle *w)
854	{	1219	{
855	if (ev_is_active (w))	1220	if (ev_is_active (w))
856	return;	1221	return;
857		1222
		1223	ev_start (EV_A_ (W)w, ++idlecnt);
		1224	array_needsize (idles, idlemax, idlecnt, );
		1225	idles [idlecnt - 1] = w;
		1226	}
		1227
		1228	void
		1229	ev_idle_stop (EV_P_ struct ev_idle *w)
		1230	{
		1231	ev_clear_pending (EV_A_ (W)w);
		1232	if (ev_is_active (w))
		1233	return;
		1234
		1235	idles [((W)w)->active - 1] = idles [--idlecnt];
		1236	ev_stop (EV_A_ (W)w);
		1237	}
		1238
		1239	void
		1240	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1241	{
		1242	if (ev_is_active (w))
		1243	return;
		1244
		1245	ev_start (EV_A_ (W)w, ++preparecnt);
		1246	array_needsize (prepares, preparemax, preparecnt, );
		1247	prepares [preparecnt - 1] = w;
		1248	}
		1249
		1250	void
		1251	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1252	{
		1253	ev_clear_pending (EV_A_ (W)w);
		1254	if (ev_is_active (w))
		1255	return;
		1256
		1257	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1258	ev_stop (EV_A_ (W)w);
		1259	}
		1260
		1261	void
		1262	ev_check_start (EV_P_ struct ev_check *w)
		1263	{
		1264	if (ev_is_active (w))
		1265	return;
		1266
		1267	ev_start (EV_A_ (W)w, ++checkcnt);
		1268	array_needsize (checks, checkmax, checkcnt, );
		1269	checks [checkcnt - 1] = w;
		1270	}
		1271
		1272	void
		1273	ev_check_stop (EV_P_ struct ev_check *w)
		1274	{
		1275	ev_clear_pending (EV_A_ (W)w);
		1276	if (ev_is_active (w))
		1277	return;
		1278
		1279	checks [((W)w)->active - 1] = checks [--checkcnt];
		1280	ev_stop (EV_A_ (W)w);
		1281	}
		1282
		1283	#ifndef SA_RESTART
		1284	# define SA_RESTART 0
		1285	#endif
		1286
		1287	void
		1288	ev_signal_start (EV_P_ struct ev_signal *w)
		1289	{
		1290	#if EV_MULTIPLICITY
		1291	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1292	#endif
		1293	if (ev_is_active (w))
		1294	return;
		1295
		1296	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1297
858	ev_start ((W)w, 1);	1298	ev_start (EV_A_ (W)w, 1);
859	array_needsize (signals, signalmax, w->signum, signals_init);	1299	array_needsize (signals, signalmax, w->signum, signals_init);
860	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1300	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
861		1301
862	if (!w->next)	1302	if (!((WL)w)->next)
863	{	1303	{
864	struct sigaction sa;	1304	struct sigaction sa;
865	sa.sa_handler = sighandler;	1305	sa.sa_handler = sighandler;
866	sigfillset (&sa.sa_mask);	1306	sigfillset (&sa.sa_mask);
867	sa.sa_flags = 0;	1307	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
868	sigaction (w->signum, &sa, 0);	1308	sigaction (w->signum, &sa, 0);
869	}	1309	}
870	}	1310	}
871		1311
872	void	1312	void
873	evsignal_stop (struct ev_signal *w)	1313	ev_signal_stop (EV_P_ struct ev_signal *w)
874	{	1314	{
875	ev_clear ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
876	if (!ev_is_active (w))	1316	if (!ev_is_active (w))
877	return;	1317	return;
878		1318
879	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1319	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
880	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
881		1321
882	if (!signals [w->signum - 1].head)	1322	if (!signals [w->signum - 1].head)
883	signal (w->signum, SIG_DFL);	1323	signal (w->signum, SIG_DFL);
884	}	1324	}
885		1325
886	void evidle_start (struct ev_idle *w)	1326	void
		1327	ev_child_start (EV_P_ struct ev_child *w)
887	{	1328	{
		1329	#if EV_MULTIPLICITY
		1330	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1331	#endif
888	if (ev_is_active (w))	1332	if (ev_is_active (w))
889	return;	1333	return;
890		1334
891	ev_start ((W)w, ++idlecnt);	1335	ev_start (EV_A_ (W)w, 1);
892	array_needsize (idles, idlemax, idlecnt, );	1336	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
893	idles [idlecnt - 1] = w;
894	}	1337	}
895		1338
896	void evidle_stop (struct ev_idle *w)	1339	void
		1340	ev_child_stop (EV_P_ struct ev_child *w)
897	{	1341	{
898	ev_clear ((W)w);	1342	ev_clear_pending (EV_A_ (W)w);
899	if (ev_is_active (w))	1343	if (ev_is_active (w))
900	return;	1344	return;
901		1345
902	idles [w->active - 1] = idles [--idlecnt];
903	ev_stop ((W)w);
904	}
905
906	void evprepare_start (struct ev_prepare *w)
907	{
908	if (ev_is_active (w))
909	return;
910
911	ev_start ((W)w, ++preparecnt);
912	array_needsize (prepares, preparemax, preparecnt, );
913	prepares [preparecnt - 1] = w;
914	}
915
916	void evprepare_stop (struct ev_prepare *w)
917	{
918	ev_clear ((W)w);
919	if (ev_is_active (w))
920	return;
921
922	prepares [w->active - 1] = prepares [--preparecnt];
923	ev_stop ((W)w);
924	}
925
926	void evcheck_start (struct ev_check *w)
927	{
928	if (ev_is_active (w))
929	return;
930
931	ev_start ((W)w, ++checkcnt);
932	array_needsize (checks, checkmax, checkcnt, );
933	checks [checkcnt - 1] = w;
934	}
935
936	void evcheck_stop (struct ev_check *w)
937	{
938	ev_clear ((W)w);
939	if (ev_is_active (w))
940	return;
941
942	checks [w->active - 1] = checks [--checkcnt];
943	ev_stop ((W)w);
944	}
945
946	void evchild_start (struct ev_child *w)
947	{
948	if (ev_is_active (w))
949	return;
950
951	ev_start ((W)w, 1);
952	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953	}
954
955	void evchild_stop (struct ev_child *w)
956	{
957	ev_clear ((W)w);
958	if (ev_is_active (w))
959	return;
960
961	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1346	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
962	ev_stop ((W)w);	1347	ev_stop (EV_A_ (W)w);
963	}	1348	}
964		1349
965	/*****************************************************************************/	1350	/*****************************************************************************/
966		1351
967	struct ev_once	1352	struct ev_once
…		…
971	void (*cb)(int revents, void *arg);	1356	void (*cb)(int revents, void *arg);
972	void *arg;	1357	void *arg;
973	};	1358	};
974		1359
975	static void	1360	static void
976	once_cb (struct ev_once *once, int revents)	1361	once_cb (EV_P_ struct ev_once *once, int revents)
977	{	1362	{
978	void (*cb)(int revents, void *arg) = once->cb;	1363	void (*cb)(int revents, void *arg) = once->cb;
979	void *arg = once->arg;	1364	void *arg = once->arg;
980		1365
981	evio_stop (&once->io);	1366	ev_io_stop (EV_A_ &once->io);
982	evtimer_stop (&once->to);	1367	ev_timer_stop (EV_A_ &once->to);
983	free (once);	1368	free (once);
984		1369
985	cb (revents, arg);	1370	cb (revents, arg);
986	}	1371	}
987		1372
988	static void	1373	static void
989	once_cb_io (struct ev_io *w, int revents)	1374	once_cb_io (EV_P_ struct ev_io *w, int revents)
990	{	1375	{
991	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1376	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
992	}	1377	}
993		1378
994	static void	1379	static void
995	once_cb_to (struct ev_timer *w, int revents)	1380	once_cb_to (EV_P_ struct ev_timer *w, int revents)
996	{	1381	{
997	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1382	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
998	}	1383	}
999		1384
1000	void	1385	void
1001	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1386	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1002	{	1387	{
1003	struct ev_once *once = malloc (sizeof (struct ev_once));	1388	struct ev_once *once = malloc (sizeof (struct ev_once));
1004		1389
1005	if (!once)	1390	if (!once)
1006	cb (EV_ERROR, arg);	1391	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1007	else	1392	else
1008	{	1393	{
1009	once->cb = cb;	1394	once->cb = cb;
1010	once->arg = arg;	1395	once->arg = arg;
1011		1396
1012	evw_init (&once->io, once_cb_io);	1397	ev_watcher_init (&once->io, once_cb_io);
1013
1014	if (fd >= 0)	1398	if (fd >= 0)
1015	{	1399	{
1016	evio_set (&once->io, fd, events);	1400	ev_io_set (&once->io, fd, events);
1017	evio_start (&once->io);	1401	ev_io_start (EV_A_ &once->io);
1018	}	1402	}
1019		1403
1020	evw_init (&once->to, once_cb_to);	1404	ev_watcher_init (&once->to, once_cb_to);
1021
1022	if (timeout >= 0.)	1405	if (timeout >= 0.)
1023	{	1406	{
1024	evtimer_set (&once->to, timeout, 0.);	1407	ev_timer_set (&once->to, timeout, 0.);
1025	evtimer_start (&once->to);	1408	ev_timer_start (EV_A_ &once->to);
1026	}	1409	}
1027	}	1410	}
1028	}	1411	}
1029		1412
1030	/*****************************************************************************/
1031
1032	#if 0
1033
1034	struct ev_io wio;
1035
1036	static void
1037	sin_cb (struct ev_io *w, int revents)
1038	{
1039	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1040	}
1041
1042	static void
1043	ocb (struct ev_timer *w, int revents)
1044	{
1045	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1046	evtimer_stop (w);
1047	evtimer_start (w);
1048	}
1049
1050	static void
1051	scb (struct ev_signal *w, int revents)
1052	{
1053	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054	evio_stop (&wio);
1055	evio_start (&wio);
1056	}
1057
1058	static void
1059	gcb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "generic %x\n", revents);
1062
1063	}
1064
1065	int main (void)
1066	{
1067	ev_init (0);
1068
1069	evio_init (&wio, sin_cb, 0, EV_READ);
1070	evio_start (&wio);
1071
1072	struct ev_timer t[10000];
1073
1074	#if 0
1075	int i;
1076	for (i = 0; i < 10000; ++i)
1077	{
1078	struct ev_timer *w = t + i;
1079	evw_init (w, ocb, i);
1080	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081	evtimer_start (w);
1082	if (drand48 () < 0.5)
1083	evtimer_stop (w);
1084	}
1085	#endif
1086
1087	struct ev_timer t1;
1088	evtimer_init (&t1, ocb, 5, 10);
1089	evtimer_start (&t1);
1090
1091	struct ev_signal sig;
1092	evsignal_init (&sig, scb, SIGQUIT);
1093	evsignal_start (&sig);
1094
1095	struct ev_check cw;
1096	evcheck_init (&cw, gcb);
1097	evcheck_start (&cw);
1098
1099	struct ev_idle iw;
1100	evidle_init (&iw, gcb);
1101	evidle_start (&iw);
1102
1103	ev_loop (0);
1104
1105	return 0;
1106	}
1107
1108	#endif
1109
1110
1111
1112

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