ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.60 by root, Sun Nov 4 18:29:44 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
63	#ifndef EV_USE_REALTIME	97	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	98	# define EV_USE_REALTIME 1
65	#endif	99	#endif
		100
		101	/**/
		102
		103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
		105	# define EV_USE_MONOTONIC 0
		106	#endif
		107
		108	#ifndef CLOCK_REALTIME
		109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
		111	#endif
		112
		113	/**/
66		114
67	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
68	#define MAX_BLOCKTIME 59.731	116	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	117	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		118	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
70		119
71	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
72		135
73	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
76		139
77	static ev_tstamp now, diff; /* monotonic clock */	140	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80
81	static int have_monotonic; /* runtime */
82
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		141
87	/*****************************************************************************/	142	/*****************************************************************************/
88		143
89	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
90	ev_time (void)	178	ev_time (void)
91	{	179	{
92	#if EV_USE_REALTIME	180	#if EV_USE_REALTIME
93	struct timespec ts;	181	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	188	#endif
101	}	189	}
102		190
103	static ev_tstamp	191	inline ev_tstamp
104	get_clock (void)	192	get_clock (void)
105	{	193	{
106	#if EV_USE_MONOTONIC	194	#if EV_USE_MONOTONIC
107	if (have_monotonic)	195	if (expect_true (have_monotonic))
108	{	196	{
109	struct timespec ts;	197	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	200	}
113	#endif	201	#endif
114		202
115	return ev_time ();	203	return ev_time ();
116	}	204	}
117		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
118	#define array_roundsize(base,n) ((n) | 4 & ~3)	212	#define array_roundsize(base,n) ((n) | 4 & ~3)
119		213
120	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
121	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
122	{ \	216	{ \
123	int newcnt = cur; \	217	int newcnt = cur; \
124	do \	218	do \
125	{ \	219	{ \
126	newcnt = array_roundsize (base, newcnt << 1); \	220	newcnt = array_roundsize (base, newcnt << 1); \
…		…
132	cur = newcnt; \	226	cur = newcnt; \
133	}	227	}
134		228
135	/*****************************************************************************/	229	/*****************************************************************************/
136		230
137	typedef struct
138	{
139	struct ev_io *head;
140	int events;
141	} ANFD;
142
143	static ANFD *anfds;
144	static int anfdmax;
145
146	static void	231	static void
147	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
148	{	233	{
149	while (count--)	234	while (count--)
150	{	235	{
151	base->head = 0;	236	base->head = 0;
152	base->events = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
153	++base;	240	++base;
154	}	241	}
155	}	242	}
156		243
157	typedef struct
158	{
159	W w;
160	int events;
161	} ANPENDING;
162
163	static ANPENDING *pendings;
164	static int pendingmax, pendingcnt;
165
166	static void	244	static void
167	event (W w, int events)	245	event (EV_P_ W w, int events)
168	{	246	{
		247	if (w->pending)
		248	{
		249	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		250	return;
		251	}
		252
169	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
170	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
171	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
173	}	257	}
174		258
175	static void	259	static void
176	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
177	{	261	{
178	int i;	262	int i;
179		263
180	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
181	event (events [i], type);	265	event (EV_A_ events [i], type);
182	}	266	}
183		267
184	static void	268	static void
185	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
186	{	270	{
187	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
188	struct ev_io *w;	272	struct ev_io *w;
189		273
190	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
191	{	275	{
192	int ev = w->events & events;	276	int ev = w->events & events;
193		277
194	if (ev)	278	if (ev)
195	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
196	}	280	}
197	}	281	}
198		282
199	/*****************************************************************************/	283	/*****************************************************************************/
200		284
201	static int *fdchanges;
202	static int fdchangemax, fdchangecnt;
203
204	static void	285	static void
205	fd_reify (void)	286	fd_reify (EV_P)
206	{	287	{
207	int i;	288	int i;
208		289
209	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
210	{	291	{
…		…
212	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
213	struct ev_io *w;	294	struct ev_io *w;
214		295
215	int events = 0;	296	int events = 0;
216		297
217	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
218	events |= w->events;	299	events |= w->events;
219		300
220	anfd->events &= ~EV_REIFY;	301	anfd->reify = 0;
221		302
222	if (anfd->events != events)	303	if (anfd->events != events)
223	{	304	{
224	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
225	anfd->events = events;	306	anfd->events = events;
226	}	307	}
227	}	308	}
228		309
229	fdchangecnt = 0;	310	fdchangecnt = 0;
230	}	311	}
231		312
232	static void	313	static void
233	fd_change (int fd)	314	fd_change (EV_P_ int fd)
234	{	315	{
235	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	316	if (anfds [fd].reify || fdchangecnt < 0)
236	return;	317	return;
237		318
238	anfds [fd].events |= EV_REIFY;	319	anfds [fd].reify = 1;
239		320
240	++fdchangecnt;	321	++fdchangecnt;
241	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
242	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
243	}	324	}
244		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		335	}
		336	}
		337
245	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
246	static void	339	static void
247	fd_recheck (void)	340	fd_ebadf (EV_P)
248	{	341	{
249	int fd;	342	int fd;
250		343
251	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
252	if (anfds [fd].events)	345	if (anfds [fd].events)
253	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
254	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
255	{	358	{
256	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	359	close (fd);
257	ev_io_stop (anfds [fd].head);	360	fd_kill (EV_A_ fd);
		361	return;
258	}	362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
259	}	378	}
260		379
261	/*****************************************************************************/	380	/*****************************************************************************/
262		381
263	static struct ev_timer **timers;
264	static int timermax, timercnt;
265
266	static struct ev_periodic **periodics;
267	static int periodicmax, periodiccnt;
268
269	static void	382	static void
270	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
271	{	384	{
272	WT w = timers [k];	385	WT w = heap [k];
273		386
274	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
275	{	388	{
276	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
277	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
278	k >>= 1;	391	k >>= 1;
279	}	392	}
280		393
281	timers [k] = w;	394	heap [k] = w;
282	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
283		396
284	}	397	}
285		398
286	static void	399	static void
287	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
288	{	401	{
289	WT w = timers [k];	402	WT w = heap [k];
290		403
291	while (k < (N >> 1))	404	while (k < (N >> 1))
292	{	405	{
293	int j = k << 1;	406	int j = k << 1;
294		407
295	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296	++j;	409	++j;
297		410
298	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
299	break;	412	break;
300		413
301	timers [k] = timers [j];	414	heap [k] = heap [j];
302	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
303	k = j;	416	k = j;
304	}	417	}
305		418
306	timers [k] = w;	419	heap [k] = w;
307	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
308	}	421	}
309		422
310	/*****************************************************************************/	423	/*****************************************************************************/
311		424
312	typedef struct	425	typedef struct
313	{	426	{
314	struct ev_signal *head;	427	struct ev_watcher_list *head;
315	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
316	} ANSIG;	429	} ANSIG;
317		430
318	static ANSIG *signals;	431	static ANSIG *signals;
319	static int signalmax;	432	static int signalmax;
320		433
321	static int sigpipe [2];	434	static int sigpipe [2];
322	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
323	static struct ev_io sigev;	436	static struct ev_io sigev;
324		437
325	static void	438	static void
326	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
327	{	440	{
328	while (count--)	441	while (count--)
329	{	442	{
330	base->head = 0;	443	base->head = 0;
331	base->gotsig = 0;	444	base->gotsig = 0;
		445
332	++base;	446	++base;
333	}	447	}
334	}	448	}
335		449
336	static void	450	static void
…		…
338	{	452	{
339	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
340		454
341	if (!gotsig)	455	if (!gotsig)
342	{	456	{
		457	int old_errno = errno;
343	gotsig = 1;	458	gotsig = 1;
344	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
345	}	461	}
346	}	462	}
347		463
348	static void	464	static void
349	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
350	{	466	{
351	struct ev_signal *w;	467	struct ev_watcher_list *w;
352	int sig;	468	int signum;
353		469
		470	read (sigpipe [0], &revents, 1);
354	gotsig = 0;	471	gotsig = 0;
355	read (sigpipe [0], &revents, 1);
356		472
357	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
358	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
359	{	475	{
360	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
361		477
362	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
363	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
364	}	480	}
365	}	481	}
366		482
367	static void	483	static void
368	siginit (void)	484	siginit (EV_P)
369	{	485	{
		486	#ifndef WIN32
370	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
371	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372		489
373	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
374	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
375	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
376		494
377	ev_io_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
378	ev_io_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
379	}	498	}
380		499
381	/*****************************************************************************/	500	/*****************************************************************************/
382		501
383	static struct ev_idle **idles;	502	#ifndef WIN32
384	static int idlemax, idlecnt;
385
386	static struct ev_prepare **prepares;
387	static int preparemax, preparecnt;
388
389	static struct ev_check **checks;
390	static int checkmax, checkcnt;
391
392	/*****************************************************************************/
393		503
394	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
395	static struct ev_signal childev;	505	static struct ev_signal childev;
396		506
397	#ifndef WCONTINUED	507	#ifndef WCONTINUED
398	# define WCONTINUED 0	508	# define WCONTINUED 0
399	#endif	509	#endif
400		510
401	static void	511	static void
402	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403	{	513	{
404	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		517	if (w->pid == pid || !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it *now* */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
405	int pid, status;	529	int pid, status;
406		530
407	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
408	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
409	if (w->pid == pid || w->pid == -1)	533	/* make sure we are called again until all childs have been reaped */
410	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
411	w->status = status;	535
412	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
413	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
414	}	539	}
		540
		541	#endif
415		542
416	/*****************************************************************************/	543	/*****************************************************************************/
417		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
418	#if EV_USE_EPOLL	548	#if EV_USE_EPOLL
419	# include "ev_epoll.c"	549	# include "ev_epoll.c"
420	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
421	#if EV_USE_SELECT	554	#if EV_USE_SELECT
422	# include "ev_select.c"	555	# include "ev_select.c"
423	#endif	556	#endif
424		557
425	int	558	int
…		…
432	ev_version_minor (void)	565	ev_version_minor (void)
433	{	566	{
434	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
435	}	568	}
436		569
437	int ev_init (int flags)	570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
438	{	573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	|| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
439	if (!ev_method)	591	if (!method)
440	{	592	{
441	#if EV_USE_MONOTONIC	593	#if EV_USE_MONOTONIC
442	{	594	{
443	struct timespec ts;	595	struct timespec ts;
444	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445	have_monotonic = 1;	597	have_monotonic = 1;
446	}	598	}
447	#endif	599	#endif
448		600
449	ev_now = ev_time ();	601	rt_now = ev_time ();
450	now = get_clock ();	602	mn_now = get_clock ();
		603	now_floor = mn_now;
451	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
452		605
453	if (pipe (sigpipe))	606	if (methods == EVMETHOD_AUTO)
454	return 0;	607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
455		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
456	ev_method = EVMETHOD_NONE;	610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
457	#if EV_USE_EPOLL	616	#if EV_USE_EPOLL
458	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
459	#endif	621	#endif
460	#if EV_USE_SELECT	622	#if EV_USE_SELECT
461	if (ev_method == EVMETHOD_NONE) select_init (flags);	623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
462	#endif	624	#endif
		625	}
		626	}
463		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/*TODO*/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/*TODO*/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
		702	if (pipe (sigpipe))
		703	return 0;
		704
		705	if (!default_loop)
		706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
464	if (ev_method)	715	if (ev_method (EV_A))
465	{	716	{
466	ev_watcher_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
467	siginit ();	719	siginit (EV_A);
468		720
		721	#ifndef WIN32
469	ev_signal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
470	ev_signal_start (&childev);	724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
471	}	727	}
		728	else
		729	default_loop = 0;
472	}	730	}
473		731
474	return ev_method;	732	return default_loop;
475	}	733	}
476		734
477	/*****************************************************************************/
478
479	void	735	void
480	ev_prefork (void)	736	ev_default_destroy (void)
481	{	737	{
482	/* nop */	738	#if EV_MULTIPLICITY
483	}	739	struct ev_loop *loop = default_loop;
484
485	void
486	ev_postfork_parent (void)
487	{
488	/* nop */
489	}
490
491	void
492	ev_postfork_child (void)
493	{
494	#if EV_USE_EPOLL
495	if (ev_method == EVMETHOD_EPOLL)
496	epoll_postfork_child ();
497	#endif	740	#endif
498		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
499	ev_io_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
500	close (sigpipe [0]);	764	close (sigpipe [0]);
501	close (sigpipe [1]);	765	close (sigpipe [1]);
502	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
503	siginit ();	769	siginit (EV_A);
504	}	770	}
505		771
506	/*****************************************************************************/	772	/*****************************************************************************/
507		773
508	static void	774	static void
509	call_pending (void)	775	call_pending (EV_P)
510	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
511	while (pendingcnt)	780	while (pendingcnt [pri])
512	{	781	{
513	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514		783
515	if (p->w)	784	if (p->w)
516	{	785	{
517	p->w->pending = 0;	786	p->w->pending = 0;
518	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
519	}	788	}
520	}	789	}
521	}	790	}
522		791
523	static void	792	static void
524	timers_reify (void)	793	timers_reify (EV_P)
525	{	794	{
526	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
527	{	796	{
528	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
529		798
530	/* first reschedule or stop timer */	799	/* first reschedule or stop timer */
531	if (w->repeat)	800	if (w->repeat)
532	{	801	{
		802	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	803	w->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	804	downheap ((WT *)timers, timercnt, 0);
536	}	805	}
537	else	806	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	807	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539		808
540	event ((W)w, EV_TIMEOUT);	809	event (EV_A_ (W)w, EV_TIMEOUT);
541	}	810	}
542	}	811	}
543		812
544	static void	813	static void
545	periodics_reify (void)	814	periodics_reify (EV_P)
546	{	815	{
547	while (periodiccnt && periodics [0]->at <= ev_now)	816	while (periodiccnt && periodics [0]->at <= rt_now)
548	{	817	{
549	struct ev_periodic *w = periodics [0];	818	struct ev_periodic *w = periodics [0];
550		819
551	/* first reschedule or stop timer */	820	/* first reschedule or stop timer */
552	if (w->interval)	821	if (w->interval)
553	{	822	{
554	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	823	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
555	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	824	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
556	downheap ((WT *)periodics, periodiccnt, 0);	825	downheap ((WT *)periodics, periodiccnt, 0);
557	}	826	}
558	else	827	else
559	ev_periodic_stop (w); /* nonrepeating: stop timer */	828	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560		829
561	event ((W)w, EV_TIMEOUT);	830	event (EV_A_ (W)w, EV_PERIODIC);
562	}	831	}
563	}	832	}
564		833
565	static void	834	static void
566	periodics_reschedule (ev_tstamp diff)	835	periodics_reschedule (EV_P)
567	{	836	{
568	int i;	837	int i;
569		838
570	/* adjust periodics after time jump */	839	/* adjust periodics after time jump */
571	for (i = 0; i < periodiccnt; ++i)	840	for (i = 0; i < periodiccnt; ++i)
572	{	841	{
573	struct ev_periodic *w = periodics [i];	842	struct ev_periodic *w = periodics [i];
574		843
575	if (w->interval)	844	if (w->interval)
576	{	845	{
577	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	846	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
578		847
579	if (fabs (diff) >= 1e-4)	848	if (fabs (diff) >= 1e-4)
580	{	849	{
581	ev_periodic_stop (w);	850	ev_periodic_stop (EV_A_ w);
582	ev_periodic_start (w);	851	ev_periodic_start (EV_A_ w);
583		852
584	i = 0; /* restart loop, inefficient, but time jumps should be rare */	853	i = 0; /* restart loop, inefficient, but time jumps should be rare */
585	}	854	}
586	}	855	}
587	}	856	}
588	}	857	}
589		858
		859	inline int
		860	time_update_monotonic (EV_P)
		861	{
		862	mn_now = get_clock ();
		863
		864	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		865	{
		866	rt_now = rtmn_diff + mn_now;
		867	return 0;
		868	}
		869	else
		870	{
		871	now_floor = mn_now;
		872	rt_now = ev_time ();
		873	return 1;
		874	}
		875	}
		876
590	static void	877	static void
591	time_update (void)	878	time_update (EV_P)
592	{	879	{
593	int i;	880	int i;
594		881
595	ev_now = ev_time ();	882	#if EV_USE_MONOTONIC
596
597	if (have_monotonic)	883	if (expect_true (have_monotonic))
598	{	884	{
599	ev_tstamp odiff = diff;	885	if (time_update_monotonic (EV_A))
600
601	for (i = 4; --i; ) /* loop a few times, before making important decisions */
602	{	886	{
603	now = get_clock ();	887	ev_tstamp odiff = rtmn_diff;
		888
		889	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		890	{
604	diff = ev_now - now;	891	rtmn_diff = rt_now - mn_now;
605		892
606	if (fabs (odiff - diff) < MIN_TIMEJUMP)	893	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
607	return; /* all is well */	894	return; /* all is well */
608		895
609	ev_now = ev_time ();	896	rt_now = ev_time ();
		897	mn_now = get_clock ();
		898	now_floor = mn_now;
		899	}
		900
		901	periodics_reschedule (EV_A);
		902	/* no timer adjustment, as the monotonic clock doesn't jump */
		903	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
610	}	904	}
611
612	periodics_reschedule (diff - odiff);
613	/* no timer adjustment, as the monotonic clock doesn't jump */
614	}	905	}
615	else	906	else
		907	#endif
616	{	908	{
617	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	909	rt_now = ev_time ();
		910
		911	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
618	{	912	{
619	periodics_reschedule (ev_now - now);	913	periodics_reschedule (EV_A);
620		914
621	/* adjust timers. this is easy, as the offset is the same for all */	915	/* adjust timers. this is easy, as the offset is the same for all */
622	for (i = 0; i < timercnt; ++i)	916	for (i = 0; i < timercnt; ++i)
623	timers [i]->at += diff;	917	timers [i]->at += rt_now - mn_now;
624	}	918	}
625		919
626	now = ev_now;	920	mn_now = rt_now;
627	}	921	}
628	}	922	}
629		923
630	int ev_loop_done;	924	void
		925	ev_ref (EV_P)
		926	{
		927	++activecnt;
		928	}
631		929
		930	void
		931	ev_unref (EV_P)
		932	{
		933	--activecnt;
		934	}
		935
		936	static int loop_done;
		937
		938	void
632	void ev_loop (int flags)	939	ev_loop (EV_P_ int flags)
633	{	940	{
634	double block;	941	double block;
635	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	942	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
636		943
637	do	944	do
638	{	945	{
639	/* queue check watchers (and execute them) */	946	/* queue check watchers (and execute them) */
640	if (preparecnt)	947	if (expect_false (preparecnt))
641	{	948	{
642	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	949	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643	call_pending ();	950	call_pending (EV_A);
644	}	951	}
645		952
646	/* update fd-related kernel structures */	953	/* update fd-related kernel structures */
647	fd_reify ();	954	fd_reify (EV_A);
648		955
649	/* calculate blocking time */	956	/* calculate blocking time */
650		957
651	/* we only need this for !monotonic clockor timers, but as we basically	958	/* we only need this for !monotonic clockor timers, but as we basically
652	always have timers, we just calculate it always */	959	always have timers, we just calculate it always */
		960	#if EV_USE_MONOTONIC
		961	if (expect_true (have_monotonic))
		962	time_update_monotonic (EV_A);
		963	else
		964	#endif
		965	{
653	ev_now = ev_time ();	966	rt_now = ev_time ();
		967	mn_now = rt_now;
		968	}
654		969
655	if (flags & EVLOOP_NONBLOCK || idlecnt)	970	if (flags & EVLOOP_NONBLOCK || idlecnt)
656	block = 0.;	971	block = 0.;
657	else	972	else
658	{	973	{
659	block = MAX_BLOCKTIME;	974	block = MAX_BLOCKTIME;
660		975
661	if (timercnt)	976	if (timercnt)
662	{	977	{
663	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	978	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
664	if (block > to) block = to;	979	if (block > to) block = to;
665	}	980	}
666		981
667	if (periodiccnt)	982	if (periodiccnt)
668	{	983	{
669	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	984	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
670	if (block > to) block = to;	985	if (block > to) block = to;
671	}	986	}
672		987
673	if (block < 0.) block = 0.;	988	if (block < 0.) block = 0.;
674	}	989	}
675		990
676	method_poll (block);	991	method_poll (EV_A_ block);
677		992
678	/* update ev_now, do magic */	993	/* update rt_now, do magic */
679	time_update ();	994	time_update (EV_A);
680		995
681	/* queue pending timers and reschedule them */	996	/* queue pending timers and reschedule them */
682	timers_reify (); /* relative timers called last */	997	timers_reify (EV_A); /* relative timers called last */
683	periodics_reify (); /* absolute timers called first */	998	periodics_reify (EV_A); /* absolute timers called first */
684		999
685	/* queue idle watchers unless io or timers are pending */	1000	/* queue idle watchers unless io or timers are pending */
686	if (!pendingcnt)	1001	if (!pendingcnt)
687	queue_events ((W *)idles, idlecnt, EV_IDLE);	1002	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688		1003
689	/* queue check watchers, to be executed first */	1004	/* queue check watchers, to be executed first */
690	if (checkcnt)	1005	if (checkcnt)
691	queue_events ((W *)checks, checkcnt, EV_CHECK);	1006	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692		1007
693	call_pending ();	1008	call_pending (EV_A);
694	}	1009	}
695	while (!ev_loop_done);	1010	while (activecnt && !loop_done);
696		1011
697	if (ev_loop_done != 2)	1012	if (loop_done != 2)
698	ev_loop_done = 0;	1013	loop_done = 0;
		1014	}
		1015
		1016	void
		1017	ev_unloop (EV_P_ int how)
		1018	{
		1019	loop_done = how;
699	}	1020	}
700		1021
701	/*****************************************************************************/	1022	/*****************************************************************************/
702		1023
703	static void	1024	inline void
704	wlist_add (WL *head, WL elem)	1025	wlist_add (WL *head, WL elem)
705	{	1026	{
706	elem->next = *head;	1027	elem->next = *head;
707	*head = elem;	1028	*head = elem;
708	}	1029	}
709		1030
710	static void	1031	inline void
711	wlist_del (WL *head, WL elem)	1032	wlist_del (WL *head, WL elem)
712	{	1033	{
713	while (*head)	1034	while (*head)
714	{	1035	{
715	if (*head == elem)	1036	if (*head == elem)
…		…
720		1041
721	head = &(*head)->next;	1042	head = &(*head)->next;
722	}	1043	}
723	}	1044	}
724		1045
725	static void	1046	inline void
726	ev_clear (W w)	1047	ev_clear_pending (EV_P_ W w)
727	{	1048	{
728	if (w->pending)	1049	if (w->pending)
729	{	1050	{
730	pendings [w->pending - 1].w = 0;	1051	pendings [ABSPRI (w)][w->pending - 1].w = 0;
731	w->pending = 0;	1052	w->pending = 0;
732	}	1053	}
733	}	1054	}
734		1055
735	static void	1056	inline void
736	ev_start (W w, int active)	1057	ev_start (EV_P_ W w, int active)
737	{	1058	{
		1059	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1060	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1061
738	w->active = active;	1062	w->active = active;
		1063	ev_ref (EV_A);
739	}	1064	}
740		1065
741	static void	1066	inline void
742	ev_stop (W w)	1067	ev_stop (EV_P_ W w)
743	{	1068	{
		1069	ev_unref (EV_A);
744	w->active = 0;	1070	w->active = 0;
745	}	1071	}
746		1072
747	/*****************************************************************************/	1073	/*****************************************************************************/
748		1074
749	void	1075	void
750	ev_io_start (struct ev_io *w)	1076	ev_io_start (EV_P_ struct ev_io *w)
751	{	1077	{
		1078	int fd = w->fd;
		1079
752	if (ev_is_active (w))	1080	if (ev_is_active (w))
753	return;	1081	return;
754		1082
755	int fd = w->fd;	1083	assert (("ev_io_start called with negative fd", fd >= 0));
756		1084
757	ev_start ((W)w, 1);	1085	ev_start (EV_A_ (W)w, 1);
758	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1086	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
759	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1087	wlist_add ((WL *)&anfds[fd].head, (WL)w);
760		1088
761	fd_change (fd);	1089	fd_change (EV_A_ fd);
762	}	1090	}
763		1091
764	void	1092	void
765	ev_io_stop (struct ev_io *w)	1093	ev_io_stop (EV_P_ struct ev_io *w)
766	{	1094	{
767	ev_clear ((W)w);	1095	ev_clear_pending (EV_A_ (W)w);
768	if (!ev_is_active (w))	1096	if (!ev_is_active (w))
769	return;	1097	return;
770		1098
771	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1099	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772	ev_stop ((W)w);	1100	ev_stop (EV_A_ (W)w);
773		1101
774	fd_change (w->fd);	1102	fd_change (EV_A_ w->fd);
775	}	1103	}
776		1104
777	void	1105	void
778	ev_timer_start (struct ev_timer *w)	1106	ev_timer_start (EV_P_ struct ev_timer *w)
779	{	1107	{
780	if (ev_is_active (w))	1108	if (ev_is_active (w))
781	return;	1109	return;
782		1110
783	w->at += now;	1111	w->at += mn_now;
784		1112
785	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1113	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
786		1114
787	ev_start ((W)w, ++timercnt);	1115	ev_start (EV_A_ (W)w, ++timercnt);
788	array_needsize (timers, timermax, timercnt, );	1116	array_needsize (timers, timermax, timercnt, );
789	timers [timercnt - 1] = w;	1117	timers [timercnt - 1] = w;
790	upheap ((WT *)timers, timercnt - 1);	1118	upheap ((WT *)timers, timercnt - 1);
791	}	1119	}
792		1120
793	void	1121	void
794	ev_timer_stop (struct ev_timer *w)	1122	ev_timer_stop (EV_P_ struct ev_timer *w)
795	{	1123	{
796	ev_clear ((W)w);	1124	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1125	if (!ev_is_active (w))
798	return;	1126	return;
799		1127
800	if (w->active < timercnt--)	1128	if (w->active < timercnt--)
801	{	1129	{
…		…
803	downheap ((WT *)timers, timercnt, w->active - 1);	1131	downheap ((WT *)timers, timercnt, w->active - 1);
804	}	1132	}
805		1133
806	w->at = w->repeat;	1134	w->at = w->repeat;
807		1135
808	ev_stop ((W)w);	1136	ev_stop (EV_A_ (W)w);
809	}	1137	}
810		1138
811	void	1139	void
812	ev_timer_again (struct ev_timer *w)	1140	ev_timer_again (EV_P_ struct ev_timer *w)
813	{	1141	{
814	if (ev_is_active (w))	1142	if (ev_is_active (w))
815	{	1143	{
816	if (w->repeat)	1144	if (w->repeat)
817	{	1145	{
818	w->at = now + w->repeat;	1146	w->at = mn_now + w->repeat;
819	downheap ((WT *)timers, timercnt, w->active - 1);	1147	downheap ((WT *)timers, timercnt, w->active - 1);
820	}	1148	}
821	else	1149	else
822	ev_timer_stop (w);	1150	ev_timer_stop (EV_A_ w);
823	}	1151	}
824	else if (w->repeat)	1152	else if (w->repeat)
825	ev_timer_start (w);	1153	ev_timer_start (EV_A_ w);
826	}	1154	}
827		1155
828	void	1156	void
829	ev_periodic_start (struct ev_periodic *w)	1157	ev_periodic_start (EV_P_ struct ev_periodic *w)
830	{	1158	{
831	if (ev_is_active (w))	1159	if (ev_is_active (w))
832	return;	1160	return;
833		1161
834	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1162	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
835		1163
836	/* this formula differs from the one in periodic_reify because we do not always round up */	1164	/* this formula differs from the one in periodic_reify because we do not always round up */
837	if (w->interval)	1165	if (w->interval)
838	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1166	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
839		1167
840	ev_start ((W)w, ++periodiccnt);	1168	ev_start (EV_A_ (W)w, ++periodiccnt);
841	array_needsize (periodics, periodicmax, periodiccnt, );	1169	array_needsize (periodics, periodicmax, periodiccnt, );
842	periodics [periodiccnt - 1] = w;	1170	periodics [periodiccnt - 1] = w;
843	upheap ((WT *)periodics, periodiccnt - 1);	1171	upheap ((WT *)periodics, periodiccnt - 1);
844	}	1172	}
845		1173
846	void	1174	void
847	ev_periodic_stop (struct ev_periodic *w)	1175	ev_periodic_stop (EV_P_ struct ev_periodic *w)
848	{	1176	{
849	ev_clear ((W)w);	1177	ev_clear_pending (EV_A_ (W)w);
850	if (!ev_is_active (w))	1178	if (!ev_is_active (w))
851	return;	1179	return;
852		1180
853	if (w->active < periodiccnt--)	1181	if (w->active < periodiccnt--)
854	{	1182	{
855	periodics [w->active - 1] = periodics [periodiccnt];	1183	periodics [w->active - 1] = periodics [periodiccnt];
856	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1184	downheap ((WT *)periodics, periodiccnt, w->active - 1);
857	}	1185	}
858		1186
859	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
860	}	1188	}
861		1189
862	void	1190	void
863	ev_signal_start (struct ev_signal *w)	1191	ev_idle_start (EV_P_ struct ev_idle *w)
864	{	1192	{
865	if (ev_is_active (w))	1193	if (ev_is_active (w))
866	return;	1194	return;
867		1195
		1196	ev_start (EV_A_ (W)w, ++idlecnt);
		1197	array_needsize (idles, idlemax, idlecnt, );
		1198	idles [idlecnt - 1] = w;
		1199	}
		1200
		1201	void
		1202	ev_idle_stop (EV_P_ struct ev_idle *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	idles [w->active - 1] = idles [--idlecnt];
		1209	ev_stop (EV_A_ (W)w);
		1210	}
		1211
		1212	void
		1213	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1214	{
		1215	if (ev_is_active (w))
		1216	return;
		1217
		1218	ev_start (EV_A_ (W)w, ++preparecnt);
		1219	array_needsize (prepares, preparemax, preparecnt, );
		1220	prepares [preparecnt - 1] = w;
		1221	}
		1222
		1223	void
		1224	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1225	{
		1226	ev_clear_pending (EV_A_ (W)w);
		1227	if (ev_is_active (w))
		1228	return;
		1229
		1230	prepares [w->active - 1] = prepares [--preparecnt];
		1231	ev_stop (EV_A_ (W)w);
		1232	}
		1233
		1234	void
		1235	ev_check_start (EV_P_ struct ev_check *w)
		1236	{
		1237	if (ev_is_active (w))
		1238	return;
		1239
		1240	ev_start (EV_A_ (W)w, ++checkcnt);
		1241	array_needsize (checks, checkmax, checkcnt, );
		1242	checks [checkcnt - 1] = w;
		1243	}
		1244
		1245	void
		1246	ev_check_stop (EV_P_ struct ev_check *w)
		1247	{
		1248	ev_clear_pending (EV_A_ (W)w);
		1249	if (ev_is_active (w))
		1250	return;
		1251
		1252	checks [w->active - 1] = checks [--checkcnt];
		1253	ev_stop (EV_A_ (W)w);
		1254	}
		1255
		1256	#ifndef SA_RESTART
		1257	# define SA_RESTART 0
		1258	#endif
		1259
		1260	void
		1261	ev_signal_start (EV_P_ struct ev_signal *w)
		1262	{
		1263	#if EV_MULTIPLICITY
		1264	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1265	#endif
		1266	if (ev_is_active (w))
		1267	return;
		1268
		1269	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1270
868	ev_start ((W)w, 1);	1271	ev_start (EV_A_ (W)w, 1);
869	array_needsize (signals, signalmax, w->signum, signals_init);	1272	array_needsize (signals, signalmax, w->signum, signals_init);
870	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1273	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871		1274
872	if (!w->next)	1275	if (!w->next)
873	{	1276	{
874	struct sigaction sa;	1277	struct sigaction sa;
875	sa.sa_handler = sighandler;	1278	sa.sa_handler = sighandler;
876	sigfillset (&sa.sa_mask);	1279	sigfillset (&sa.sa_mask);
877	sa.sa_flags = 0;	1280	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878	sigaction (w->signum, &sa, 0);	1281	sigaction (w->signum, &sa, 0);
879	}	1282	}
880	}	1283	}
881		1284
882	void	1285	void
883	ev_signal_stop (struct ev_signal *w)	1286	ev_signal_stop (EV_P_ struct ev_signal *w)
884	{	1287	{
885	ev_clear ((W)w);	1288	ev_clear_pending (EV_A_ (W)w);
886	if (!ev_is_active (w))	1289	if (!ev_is_active (w))
887	return;	1290	return;
888		1291
889	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1292	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
891		1294
892	if (!signals [w->signum - 1].head)	1295	if (!signals [w->signum - 1].head)
893	signal (w->signum, SIG_DFL);	1296	signal (w->signum, SIG_DFL);
894	}	1297	}
895		1298
896	void	1299	void
897	ev_idle_start (struct ev_idle *w)	1300	ev_child_start (EV_P_ struct ev_child *w)
898	{	1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
899	if (ev_is_active (w))	1305	if (ev_is_active (w))
900	return;	1306	return;
901		1307
902	ev_start ((W)w, ++idlecnt);	1308	ev_start (EV_A_ (W)w, 1);
903	array_needsize (idles, idlemax, idlecnt, );	1309	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
904	idles [idlecnt - 1] = w;
905	}	1310	}
906		1311
907	void	1312	void
908	ev_idle_stop (struct ev_idle *w)	1313	ev_child_stop (EV_P_ struct ev_child *w)
909	{	1314	{
910	ev_clear ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
911	if (ev_is_active (w))	1316	if (ev_is_active (w))
912	return;	1317	return;
913		1318
914	idles [w->active - 1] = idles [--idlecnt];
915	ev_stop ((W)w);
916	}
917
918	void
919	ev_prepare_start (struct ev_prepare *w)
920	{
921	if (ev_is_active (w))
922	return;
923
924	ev_start ((W)w, ++preparecnt);
925	array_needsize (prepares, preparemax, preparecnt, );
926	prepares [preparecnt - 1] = w;
927	}
928
929	void
930	ev_prepare_stop (struct ev_prepare *w)
931	{
932	ev_clear ((W)w);
933	if (ev_is_active (w))
934	return;
935
936	prepares [w->active - 1] = prepares [--preparecnt];
937	ev_stop ((W)w);
938	}
939
940	void
941	ev_check_start (struct ev_check *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, ++checkcnt);
947	array_needsize (checks, checkmax, checkcnt, );
948	checks [checkcnt - 1] = w;
949	}
950
951	void
952	ev_check_stop (struct ev_check *w)
953	{
954	ev_clear ((W)w);
955	if (ev_is_active (w))
956	return;
957
958	checks [w->active - 1] = checks [--checkcnt];
959	ev_stop ((W)w);
960	}
961
962	void
963	ev_child_start (struct ev_child *w)
964	{
965	if (ev_is_active (w))
966	return;
967
968	ev_start ((W)w, 1);
969	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	}
971
972	void
973	ev_child_stop (struct ev_child *w)
974	{
975	ev_clear ((W)w);
976	if (ev_is_active (w))
977	return;
978
979	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1319	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	ev_stop ((W)w);	1320	ev_stop (EV_A_ (W)w);
981	}	1321	}
982		1322
983	/*****************************************************************************/	1323	/*****************************************************************************/
984		1324
985	struct ev_once	1325	struct ev_once
…		…
989	void (*cb)(int revents, void *arg);	1329	void (*cb)(int revents, void *arg);
990	void *arg;	1330	void *arg;
991	};	1331	};
992		1332
993	static void	1333	static void
994	once_cb (struct ev_once *once, int revents)	1334	once_cb (EV_P_ struct ev_once *once, int revents)
995	{	1335	{
996	void (*cb)(int revents, void *arg) = once->cb;	1336	void (*cb)(int revents, void *arg) = once->cb;
997	void *arg = once->arg;	1337	void *arg = once->arg;
998		1338
999	ev_io_stop (&once->io);	1339	ev_io_stop (EV_A_ &once->io);
1000	ev_timer_stop (&once->to);	1340	ev_timer_stop (EV_A_ &once->to);
1001	free (once);	1341	free (once);
1002		1342
1003	cb (revents, arg);	1343	cb (revents, arg);
1004	}	1344	}
1005		1345
1006	static void	1346	static void
1007	once_cb_io (struct ev_io *w, int revents)	1347	once_cb_io (EV_P_ struct ev_io *w, int revents)
1008	{	1348	{
1009	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1349	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1010	}	1350	}
1011		1351
1012	static void	1352	static void
1013	once_cb_to (struct ev_timer *w, int revents)	1353	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014	{	1354	{
1015	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1355	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1016	}	1356	}
1017		1357
1018	void	1358	void
1019	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1359	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1020	{	1360	{
1021	struct ev_once *once = malloc (sizeof (struct ev_once));	1361	struct ev_once *once = malloc (sizeof (struct ev_once));
1022		1362
1023	if (!once)	1363	if (!once)
1024	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1364	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1029		1369
1030	ev_watcher_init (&once->io, once_cb_io);	1370	ev_watcher_init (&once->io, once_cb_io);
1031	if (fd >= 0)	1371	if (fd >= 0)
1032	{	1372	{
1033	ev_io_set (&once->io, fd, events);	1373	ev_io_set (&once->io, fd, events);
1034	ev_io_start (&once->io);	1374	ev_io_start (EV_A_ &once->io);
1035	}	1375	}
1036		1376
1037	ev_watcher_init (&once->to, once_cb_to);	1377	ev_watcher_init (&once->to, once_cb_to);
1038	if (timeout >= 0.)	1378	if (timeout >= 0.)
1039	{	1379	{
1040	ev_timer_set (&once->to, timeout, 0.);	1380	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1381	ev_timer_start (EV_A_ &once->to);
1042	}	1382	}
1043	}	1383	}
1044	}	1384	}
1045		1385
1046	/*****************************************************************************/
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif
1102
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
1128

Diff Legend

–	Removed lines
+	Added lines
<	Changed lines
>	Changed lines