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Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 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	*/
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	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150
151	static void	239	static void
152	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
153	{	241	{
154	while (count--)	242	while (count--)
155	{	243	{
…		…
159		247
160	++base;	248	++base;
161	}	249	}
162	}	250	}
163		251
164	typedef struct
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void	252	static void
174	event (W w, int events)	253	event (EV_P_ W w, int events)
175	{	254	{
176	if (w->pending)	255	if (w->pending)
177	{	256	{
178	pendings [w->pending - 1].events |= events;	257	pendings [ABSPRI (w)][w->pending - 1].events |= events;
179	return;	258	return;
180	}	259	}
181		260
182	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
184	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	265	}
187		266
188	static void	267	static void
189	queue_events (W *events, int eventcnt, int type)	268	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	269	{
191	int i;	270	int i;
192		271
193	for (i = 0; i < eventcnt; ++i)	272	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	273	event (EV_A_ events [i], type);
195	}	274	}
196		275
197	static void	276	static void
198	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
199	{	278	{
200	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	280	struct ev_io *w;
202		281
203	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
204	{	283	{
205	int ev = w->events & events;	284	int ev = w->events & events;
206		285
207	if (ev)	286	if (ev)
208	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
209	}	288	}
210	}	289	}
211		290
212	/*****************************************************************************/	291	/*****************************************************************************/
213		292
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	293	static void
218	fd_reify (void)	294	fd_reify (EV_P)
219	{	295	{
220	int i;	296	int i;
221		297
222	for (i = 0; i < fdchangecnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
223	{	299	{
…		…
225	ANFD *anfd = anfds + fd;	301	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	302	struct ev_io *w;
227		303
228	int events = 0;	304	int events = 0;
229		305
230	for (w = anfd->head; w; w = w->next)	306	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
231	events |= w->events;	307	events |= w->events;
232		308
233	anfd->reify = 0;	309	anfd->reify = 0;
234		310
235	if (anfd->events != events)	311	if (anfd->events != events)
236	{	312	{
237	method_modify (fd, anfd->events, events);	313	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	314	anfd->events = events;
239	}	315	}
240	}	316	}
241		317
242	fdchangecnt = 0;	318	fdchangecnt = 0;
243	}	319	}
244		320
245	static void	321	static void
246	fd_change (int fd)	322	fd_change (EV_P_ int fd)
247	{	323	{
248	if (anfds [fd].reify || fdchangecnt < 0)	324	if (anfds [fd].reify || fdchangecnt < 0)
249	return;	325	return;
250		326
251	anfds [fd].reify = 1;	327	anfds [fd].reify = 1;
…		…
253	++fdchangecnt;	329	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
255	fdchanges [fdchangecnt - 1] = fd;	331	fdchanges [fdchangecnt - 1] = fd;
256	}	332	}
257		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
258	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
259	static void	347	static void
260	fd_recheck (void)	348	fd_ebadf (EV_P)
261	{	349	{
262	int fd;	350	int fd;
263		351
264	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	353	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
267	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)
268	{	366	{
269	ev_io_stop (anfds [fd].head);	367	close (fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	368	fd_kill (EV_A_ fd);
		369	return;
271	}	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	}
272	}	386	}
273		387
274	/*****************************************************************************/	388	/*****************************************************************************/
275		389
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	390	static void
283	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
284	{	392	{
285	WT w = timers [k];	393	WT w = heap [k];
286		394
287	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
288	{	396	{
289	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
291	k >>= 1;	399	k >>= 1;
292	}	400	}
293		401
294	timers [k] = w;	402	heap [k] = w;
295	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
296		404
297	}	405	}
298		406
299	static void	407	static void
300	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
301	{	409	{
302	WT w = timers [k];	410	WT w = heap [k];
303		411
304	while (k < (N >> 1))	412	while (k < (N >> 1))
305	{	413	{
306	int j = k << 1;	414	int j = k << 1;
307		415
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	417	++j;
310		418
311	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
312	break;	420	break;
313		421
314	timers [k] = timers [j];	422	heap [k] = heap [j];
315	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
316	k = j;	424	k = j;
317	}	425	}
318		426
319	timers [k] = w;	427	heap [k] = w;
320	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
321	}	429	}
322		430
323	/*****************************************************************************/	431	/*****************************************************************************/
324		432
325	typedef struct	433	typedef struct
326	{	434	{
327	struct ev_signal *head;	435	struct ev_watcher_list *head;
328	sig_atomic_t volatile gotsig;	436	sig_atomic_t volatile gotsig;
329	} ANSIG;	437	} ANSIG;
330		438
331	static ANSIG *signals;	439	static ANSIG *signals;
332	static int signalmax;	440	static int signalmax;
…		…
352	{	460	{
353	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
354		462
355	if (!gotsig)	463	if (!gotsig)
356	{	464	{
		465	int old_errno = errno;
357	gotsig = 1;	466	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
359	}	469	}
360	}	470	}
361		471
362	static void	472	static void
363	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	474	{
365	struct ev_signal *w;	475	struct ev_watcher_list *w;
366	int sig;	476	int signum;
367		477
368	read (sigpipe [0], &revents, 1);	478	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	479	gotsig = 0;
370		480
371	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
373	{	483	{
374	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
375		485
376	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
378	}	488	}
379	}	489	}
380		490
381	static void	491	static void
382	siginit (void)	492	siginit (EV_P)
383	{	493	{
		494	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		497
387	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
390		502
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	506	}
394		507
395	/*****************************************************************************/	508	/*****************************************************************************/
396		509
397	static struct ev_idle **idles;	510	#ifndef WIN32
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407		511
408	static struct ev_child *childs [PID_HASHSIZE];	512	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;	513	static struct ev_signal childev;
410		514
411	#ifndef WCONTINUED	515	#ifndef WCONTINUED
412	# define WCONTINUED 0	516	# define WCONTINUED 0
413	#endif	517	#endif
414		518
415	static void	519	static void
416	childcb (struct ev_signal *sw, int revents)	520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	521	{
418	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	{
419	int pid, status;	537	int pid, status;
420		538
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	540	{
423	if (w->pid == pid || w->pid == -1)	541	/* make sure we are called again until all childs have been reaped */
424	{	542	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	543
426	event ((W)w, EV_CHILD);	544	child_reap (EV_A_ sw, pid, pid, status);
427	}	545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
428	}	547	}
		548
		549	#endif
429		550
430	/*****************************************************************************/	551	/*****************************************************************************/
431		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
432	#if EV_USE_EPOLL	556	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	557	# include "ev_epoll.c"
434	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
435	#if EV_USE_SELECT	562	#if EV_USE_SELECT
436	# include "ev_select.c"	563	# include "ev_select.c"
437	#endif	564	#endif
438		565
439	int	566	int
…		…
446	ev_version_minor (void)	573	ev_version_minor (void)
447	{	574	{
448	return EV_VERSION_MINOR;	575	return EV_VERSION_MINOR;
449	}	576	}
450		577
451	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)
452	{	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	{
453	if (!ev_method)	599	if (!method)
454	{	600	{
455	#if EV_USE_MONOTONIC	601	#if EV_USE_MONOTONIC
456	{	602	{
457	struct timespec ts;	603	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	605	have_monotonic = 1;
460	}	606	}
461	#endif	607	#endif
462		608
463	ev_now = ev_time ();	609	rt_now = ev_time ();
464	now = get_clock ();	610	mn_now = get_clock ();
		611	now_floor = mn_now;
465	diff = ev_now - now;	612	rtmn_diff = rt_now - mn_now;
466		613
467	if (pipe (sigpipe))	614	if (methods == EVMETHOD_AUTO)
468	return 0;	615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
470	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
471	#if EV_USE_EPOLL	627	#if EV_USE_EPOLL
472	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);
473	#endif	632	#endif
474	#if EV_USE_SELECT	633	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	635	#endif
		636	}
		637	}
477		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
478	if (ev_method)	729	if (ev_method (EV_A))
479	{	730	{
480	ev_watcher_init (&sigev, sigcb);	731	ev_watcher_init (&sigev, sigcb);
		732	ev_set_priority (&sigev, EV_MAXPRI);
481	siginit ();	733	siginit (EV_A);
482		734
		735	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	736	ev_signal_init (&childev, childcb, SIGCHLD);
		737	ev_set_priority (&childev, EV_MAXPRI);
484	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
485	}	741	}
		742	else
		743	default_loop = 0;
486	}	744	}
487		745
488	return ev_method;	746	return default_loop;
489	}	747	}
490		748
491	/*****************************************************************************/
492
493	void	749	void
494	ev_fork_prepare (void)	750	ev_default_destroy (void)
495	{	751	{
496	/* nop */	752	#if EV_MULTIPLICITY
497	}	753	struct ev_loop *loop = default_loop;
498
499	void
500	ev_fork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_fork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif	754	#endif
512		755
		756	ev_ref (EV_A); /* child watcher */
		757	ev_signal_stop (EV_A_ &childev);
		758
		759	ev_ref (EV_A); /* signal watcher */
513	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);
514	close (sigpipe [0]);	778	close (sigpipe [0]);
515	close (sigpipe [1]);	779	close (sigpipe [1]);
516	pipe (sigpipe);	780	pipe (sigpipe);
		781
		782	ev_ref (EV_A); /* signal watcher */
517	siginit ();	783	siginit (EV_A);
518	}	784	}
519		785
520	/*****************************************************************************/	786	/*****************************************************************************/
521		787
522	static void	788	static void
523	call_pending (void)	789	call_pending (EV_P)
524	{	790	{
		791	int pri;
		792
		793	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	794	while (pendingcnt [pri])
526	{	795	{
527	ANPENDING *p = pendings + --pendingcnt;	796	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		797
529	if (p->w)	798	if (p->w)
530	{	799	{
531	p->w->pending = 0;	800	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	801
		802	(*(void (**)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
533	}	803	}
534	}	804	}
535	}	805	}
536		806
537	static void	807	static void
538	timers_reify (void)	808	timers_reify (EV_P)
539	{	809	{
540	while (timercnt && timers [0]->at <= now)	810	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	811	{
542	struct ev_timer *w = timers [0];	812	struct ev_timer *w = timers [0];
		813
		814	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		815
544	/* first reschedule or stop timer */	816	/* first reschedule or stop timer */
545	if (w->repeat)	817	if (w->repeat)
546	{	818	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	819	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	820	((WT)w)->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	821	downheap ((WT *)timers, timercnt, 0);
550	}	822	}
551	else	823	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	824	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		825
554	event ((W)w, EV_TIMEOUT);	826	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	827	}
556	}	828	}
557		829
558	static void	830	static void
559	periodics_reify (void)	831	periodics_reify (EV_P)
560	{	832	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	833	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
562	{	834	{
563	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)));
564		838
565	/* first reschedule or stop timer */	839	/* first reschedule or stop timer */
566	if (w->interval)	840	if (w->interval)
567	{	841	{
568	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;
569	assert (("ev_periodic timeout in the past detected while processing timers, 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));
570	downheap ((WT *)periodics, periodiccnt, 0);	844	downheap ((WT *)periodics, periodiccnt, 0);
571	}	845	}
572	else	846	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	847	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		848
575	event ((W)w, EV_PERIODIC);	849	event (EV_A_ (W)w, EV_PERIODIC);
576	}	850	}
577	}	851	}
578		852
579	static void	853	static void
580	periodics_reschedule (ev_tstamp diff)	854	periodics_reschedule (EV_P)
581	{	855	{
582	int i;	856	int i;
583		857
584	/* adjust periodics after time jump */	858	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	859	for (i = 0; i < periodiccnt; ++i)
586	{	860	{
587	struct ev_periodic *w = periodics [i];	861	struct ev_periodic *w = periodics [i];
588		862
589	if (w->interval)	863	if (w->interval)
590	{	864	{
591	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;
592		866
593	if (fabs (diff) >= 1e-4)	867	if (fabs (diff) >= 1e-4)
594	{	868	{
595	ev_periodic_stop (w);	869	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	870	ev_periodic_start (EV_A_ w);
597		871
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	872	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	873	}
600	}	874	}
601	}	875	}
602	}	876	}
603		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
604	static void	896	static void
605	time_update (void)	897	time_update (EV_P)
606	{	898	{
607	int i;	899	int i;
608		900
609	ev_now = ev_time ();	901	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	902	if (expect_true (have_monotonic))
612	{	903	{
613	ev_tstamp odiff = diff;	904	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	905	{
617	now = get_clock ();	906	ev_tstamp odiff = rtmn_diff;
		907
		908	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		909	{
618	diff = ev_now - now;	910	rtmn_diff = rt_now - mn_now;
619		911
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	912	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	913	return; /* all is well */
622		914
623	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) */
624	}	923	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	924	}
629	else	925	else
		926	#endif
630	{	927	{
631	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))
632	{	931	{
633	periodics_reschedule (ev_now - now);	932	periodics_reschedule (EV_A);
634		933
635	/* 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 */
636	for (i = 0; i < timercnt; ++i)	935	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	936	((WT)timers [i])->at += rt_now - mn_now;
638	}	937	}
639		938
640	now = ev_now;	939	mn_now = rt_now;
641	}	940	}
642	}	941	}
643		942
644	int ev_loop_done;	943	void
		944	ev_ref (EV_P)
		945	{
		946	++activecnt;
		947	}
645		948
		949	void
		950	ev_unref (EV_P)
		951	{
		952	--activecnt;
		953	}
		954
		955	static int loop_done;
		956
		957	void
646	void ev_loop (int flags)	958	ev_loop (EV_P_ int flags)
647	{	959	{
648	double block;	960	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	961	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650		962
651	do	963	do
652	{	964	{
653	/* queue check watchers (and execute them) */	965	/* queue check watchers (and execute them) */
654	if (preparecnt)	966	if (expect_false (preparecnt))
655	{	967	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	968	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	969	call_pending (EV_A);
658	}	970	}
659		971
660	/* update fd-related kernel structures */	972	/* update fd-related kernel structures */
661	fd_reify ();	973	fd_reify (EV_A);
662		974
663	/* calculate blocking time */	975	/* calculate blocking time */
664		976
665	/* 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
666	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	{
667	ev_now = ev_time ();	985	rt_now = ev_time ();
		986	mn_now = rt_now;
		987	}
668		988
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	989	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	990	block = 0.;
671	else	991	else
672	{	992	{
673	block = MAX_BLOCKTIME;	993	block = MAX_BLOCKTIME;
674		994
675	if (timercnt)	995	if (timercnt)
676	{	996	{
677	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;
678	if (block > to) block = to;	998	if (block > to) block = to;
679	}	999	}
680		1000
681	if (periodiccnt)	1001	if (periodiccnt)
682	{	1002	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1003	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
684	if (block > to) block = to;	1004	if (block > to) block = to;
685	}	1005	}
686		1006
687	if (block < 0.) block = 0.;	1007	if (block < 0.) block = 0.;
688	}	1008	}
689		1009
690	method_poll (block);	1010	method_poll (EV_A_ block);
691		1011
692	/* update ev_now, do magic */	1012	/* update rt_now, do magic */
693	time_update ();	1013	time_update (EV_A);
694		1014
695	/* queue pending timers and reschedule them */	1015	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1016	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	1017	periodics_reify (EV_A); /* absolute timers called first */
698		1018
699	/* queue idle watchers unless io or timers are pending */	1019	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1020	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1021	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1022
703	/* queue check watchers, to be executed first */	1023	/* queue check watchers, to be executed first */
704	if (checkcnt)	1024	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1025	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1026
707	call_pending ();	1027	call_pending (EV_A);
708	}	1028	}
709	while (!ev_loop_done);	1029	while (activecnt && !loop_done);
710		1030
711	if (ev_loop_done != 2)	1031	if (loop_done != 2)
712	ev_loop_done = 0;	1032	loop_done = 0;
		1033	}
		1034
		1035	void
		1036	ev_unloop (EV_P_ int how)
		1037	{
		1038	loop_done = how;
713	}	1039	}
714		1040
715	/*****************************************************************************/	1041	/*****************************************************************************/
716		1042
717	static void	1043	inline void
718	wlist_add (WL *head, WL elem)	1044	wlist_add (WL *head, WL elem)
719	{	1045	{
720	elem->next = *head;	1046	elem->next = *head;
721	*head = elem;	1047	*head = elem;
722	}	1048	}
723		1049
724	static void	1050	inline void
725	wlist_del (WL *head, WL elem)	1051	wlist_del (WL *head, WL elem)
726	{	1052	{
727	while (*head)	1053	while (*head)
728	{	1054	{
729	if (*head == elem)	1055	if (*head == elem)
…		…
734		1060
735	head = &(*head)->next;	1061	head = &(*head)->next;
736	}	1062	}
737	}	1063	}
738		1064
739	static void	1065	inline void
740	ev_clear_pending (W w)	1066	ev_clear_pending (EV_P_ W w)
741	{	1067	{
742	if (w->pending)	1068	if (w->pending)
743	{	1069	{
744	pendings [w->pending - 1].w = 0;	1070	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1071	w->pending = 0;
746	}	1072	}
747	}	1073	}
748		1074
749	static void	1075	inline void
750	ev_start (W w, int active)	1076	ev_start (EV_P_ W w, int active)
751	{	1077	{
		1078	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1079	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1080
752	w->active = active;	1081	w->active = active;
		1082	ev_ref (EV_A);
753	}	1083	}
754		1084
755	static void	1085	inline void
756	ev_stop (W w)	1086	ev_stop (EV_P_ W w)
757	{	1087	{
		1088	ev_unref (EV_A);
758	w->active = 0;	1089	w->active = 0;
759	}	1090	}
760		1091
761	/*****************************************************************************/	1092	/*****************************************************************************/
762		1093
763	void	1094	void
764	ev_io_start (struct ev_io *w)	1095	ev_io_start (EV_P_ struct ev_io *w)
765	{	1096	{
		1097	int fd = w->fd;
		1098
766	if (ev_is_active (w))	1099	if (ev_is_active (w))
767	return;	1100	return;
768		1101
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1102	assert (("ev_io_start called with negative fd", fd >= 0));
772		1103
773	ev_start ((W)w, 1);	1104	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1105	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1106	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1107
777	fd_change (fd);	1108	fd_change (EV_A_ fd);
778	}	1109	}
779		1110
780	void	1111	void
781	ev_io_stop (struct ev_io *w)	1112	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1113	{
783	ev_clear_pending ((W)w);	1114	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
785	return;	1116	return;
786		1117
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1118	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1119	ev_stop (EV_A_ (W)w);
789		1120
790	fd_change (w->fd);	1121	fd_change (EV_A_ w->fd);
791	}	1122	}
792		1123
793	void	1124	void
794	ev_timer_start (struct ev_timer *w)	1125	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1126	{
796	if (ev_is_active (w))	1127	if (ev_is_active (w))
797	return;	1128	return;
798		1129
799	w->at += now;	1130	((WT)w)->at += mn_now;
800		1131
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1132	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1133
803	ev_start ((W)w, ++timercnt);	1134	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1135	array_needsize (timers, timermax, timercnt, );
805	timers [timercnt - 1] = w;	1136	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1137	upheap ((WT *)timers, timercnt - 1);
807	}
808		1138
		1139	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1140	}
		1141
809	void	1142	void
810	ev_timer_stop (struct ev_timer *w)	1143	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1144	{
812	ev_clear_pending ((W)w);	1145	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1146	if (!ev_is_active (w))
814	return;	1147	return;
815		1148
		1149	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1150
816	if (w->active < timercnt--)	1151	if (((W)w)->active < timercnt--)
817	{	1152	{
818	timers [w->active - 1] = timers [timercnt];	1153	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1154	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1155	}
821		1156
822	w->at = w->repeat;	1157	((WT)w)->at = w->repeat;
823		1158
824	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
825	}	1160	}
826		1161
827	void	1162	void
828	ev_timer_again (struct ev_timer *w)	1163	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1164	{
830	if (ev_is_active (w))	1165	if (ev_is_active (w))
831	{	1166	{
832	if (w->repeat)	1167	if (w->repeat)
833	{	1168	{
834	w->at = now + w->repeat;	1169	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1170	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
836	}	1171	}
837	else	1172	else
838	ev_timer_stop (w);	1173	ev_timer_stop (EV_A_ w);
839	}	1174	}
840	else if (w->repeat)	1175	else if (w->repeat)
841	ev_timer_start (w);	1176	ev_timer_start (EV_A_ w);
842	}	1177	}
843		1178
844	void	1179	void
845	ev_periodic_start (struct ev_periodic *w)	1180	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1181	{
847	if (ev_is_active (w))	1182	if (ev_is_active (w))
848	return;	1183	return;
849		1184
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1185	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1186
852	/* 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 */
853	if (w->interval)	1188	if (w->interval)
854	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;
855		1190
856	ev_start ((W)w, ++periodiccnt);	1191	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1192	array_needsize (periodics, periodicmax, periodiccnt, );
858	periodics [periodiccnt - 1] = w;	1193	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1194	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1195
		1196	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1197	}
		1198
862	void	1199	void
863	ev_periodic_stop (struct ev_periodic *w)	1200	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1201	{
865	ev_clear_pending ((W)w);	1202	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1203	if (!ev_is_active (w))
867	return;	1204	return;
868		1205
		1206	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1207
869	if (w->active < periodiccnt--)	1208	if (((W)w)->active < periodiccnt--)
870	{	1209	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1210	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1211	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1212	}
874		1213
875	ev_stop ((W)w);	1214	ev_stop (EV_A_ (W)w);
876	}	1215	}
877		1216
878	void	1217	void
879	ev_signal_start (struct ev_signal *w)	1218	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1219	{
881	if (ev_is_active (w))	1220	if (ev_is_active (w))
882	return;	1221	return;
883		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
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1296	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1297
886	ev_start ((W)w, 1);	1298	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1299	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1300	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1301
890	if (!w->next)	1302	if (!((WL)w)->next)
891	{	1303	{
892	struct sigaction sa;	1304	struct sigaction sa;
893	sa.sa_handler = sighandler;	1305	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1306	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1307	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1308	sigaction (w->signum, &sa, 0);
897	}	1309	}
898	}	1310	}
899		1311
900	void	1312	void
901	ev_signal_stop (struct ev_signal *w)	1313	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1314	{
903	ev_clear_pending ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1316	if (!ev_is_active (w))
905	return;	1317	return;
906		1318
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1319	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
909		1321
910	if (!signals [w->signum - 1].head)	1322	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1323	signal (w->signum, SIG_DFL);
912	}	1324	}
913		1325
914	void	1326	void
915	ev_idle_start (struct ev_idle *w)	1327	ev_child_start (EV_P_ struct ev_child *w)
916	{	1328	{
		1329	#if EV_MULTIPLICITY
		1330	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1331	#endif
917	if (ev_is_active (w))	1332	if (ev_is_active (w))
918	return;	1333	return;
919		1334
920	ev_start ((W)w, ++idlecnt);	1335	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1336	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1337	}
924		1338
925	void	1339	void
926	ev_idle_stop (struct ev_idle *w)	1340	ev_child_stop (EV_P_ struct ev_child *w)
927	{	1341	{
928	ev_clear_pending ((W)w);	1342	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1343	if (ev_is_active (w))
930	return;	1344	return;
931		1345
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)
982	{
983	if (ev_is_active (w))
984	return;
985
986	ev_start ((W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}
989
990	void
991	ev_child_stop (struct ev_child *w)
992	{
993	ev_clear_pending ((W)w);
994	if (ev_is_active (w))
995	return;
996
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1346	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1347	ev_stop (EV_A_ (W)w);
999	}	1348	}
1000		1349
1001	/*****************************************************************************/	1350	/*****************************************************************************/
1002		1351
1003	struct ev_once	1352	struct ev_once
…		…
1007	void (*cb)(int revents, void *arg);	1356	void (*cb)(int revents, void *arg);
1008	void *arg;	1357	void *arg;
1009	};	1358	};
1010		1359
1011	static void	1360	static void
1012	once_cb (struct ev_once *once, int revents)	1361	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1362	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1363	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1364	void *arg = once->arg;
1016		1365
1017	ev_io_stop (&once->io);	1366	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1367	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1368	free (once);
1020		1369
1021	cb (revents, arg);	1370	cb (revents, arg);
1022	}	1371	}
1023		1372
1024	static void	1373	static void
1025	once_cb_io (struct ev_io *w, int revents)	1374	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1375	{
1027	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);
1028	}	1377	}
1029		1378
1030	static void	1379	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1380	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1381	{
1033	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);
1034	}	1383	}
1035		1384
1036	void	1385	void
1037	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)
1038	{	1387	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1388	struct ev_once *once = malloc (sizeof (struct ev_once));
1040		1389
1041	if (!once)	1390	if (!once)
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1391	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1047		1396
1048	ev_watcher_init (&once->io, once_cb_io);	1397	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1398	if (fd >= 0)
1050	{	1399	{
1051	ev_io_set (&once->io, fd, events);	1400	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1401	ev_io_start (EV_A_ &once->io);
1053	}	1402	}
1054		1403
1055	ev_watcher_init (&once->to, once_cb_to);	1404	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1405	if (timeout >= 0.)
1057	{	1406	{
1058	ev_timer_set (&once->to, timeout, 0.);	1407	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1408	ev_timer_start (EV_A_ &once->to);
1060	}	1409	}
1061	}	1410	}
1062	}	1411	}
1063		1412
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}
1141
1142	#endif
1143
1144
1145
1146

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