[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
49	# endif	102	# endif
50	#endif	103	#endif
51		104
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
63		122
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		127
68	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		143
70	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
73		147
74	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77		149
78	static int have_monotonic; /* runtime */	150	#if WIN32
79		151	/* note: the comment below could not be substantiated, but what would I care */
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
81	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
82	static void (*method_poll)(ev_tstamp timeout);	154	#endif
83		155
84	/*****************************************************************************/	156	/*****************************************************************************/
85		157
86	ev_tstamp	158	typedef struct
		159	{
		160	WL head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
		164
		165	typedef struct
		166	{
		167	W w;
		168	int events;
		169	} ANPENDING;
		170
		171	#if EV_MULTIPLICITY
		172
		173	struct ev_loop
		174	{
		175	# define VAR(name,decl) decl;
		176	# include "ev_vars.h"
		177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
		180
		181	#else
		182
		183	# define VAR(name,decl) static decl;
		184	# include "ev_vars.h"
		185	# undef VAR
		186
		187	#endif
		188
		189	/*****************************************************************************/
		190
		191	inline ev_tstamp
87	ev_time (void)	192	ev_time (void)
88	{	193	{
89	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
90	struct timespec ts;	195	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	198	#else
94	struct timeval tv;	199	struct timeval tv;
95	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	202	#endif
98	}	203	}
99		204
100	static ev_tstamp	205	inline ev_tstamp
101	get_clock (void)	206	get_clock (void)
102	{	207	{
103	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
104	if (have_monotonic)	209	if (expect_true (have_monotonic))
105	{	210	{
106	struct timespec ts;	211	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	214	}
110	#endif	215	#endif
111		216
112	return ev_time ();	217	return ev_time ();
113	}	218	}
114		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		227
115	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
117	{ \	230	{ \
118	int newcnt = cur; \	231	int newcnt = cur; \
119	do \	232	do \
120	{ \	233	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	234	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	235	} \
123	while ((cnt) > newcnt); \	236	while ((cnt) > newcnt); \
124	\	237	\
125	base = realloc (base, sizeof (base) (newcnt)); \	238	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	240	cur = newcnt; \
128	}	241	}
129		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (base) (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
130	/*****************************************************************************/	254	/*****************************************************************************/
131		255
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	256	static void
145	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
146	{	258	{
147	while (count--)	259	while (count--)
148	{	260	{
149	base->head = 0;	261	base->head = 0;
150	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
151	++base;	265	++base;
152	}	266	}
153	}	267	}
154		268
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	269	static void
165	event (W w, int events)	270	event (EV_P_ W w, int events)
166	{	271	{
167	if (w->active)	272	if (w->pending)
168	{	273	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	274	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		275	return;
173	}	276	}
174	}
175		277
		278	w->pending = ++pendingcnt [ABSPRI (w)];
		279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		280	pendings [ABSPRI (w)][w->pending - 1].w = w;
		281	pendings [ABSPRI (w)][w->pending - 1].events = events;
		282	}
		283
176	static void	284	static void
		285	queue_events (EV_P_ W *events, int eventcnt, int type)
		286	{
		287	int i;
		288
		289	for (i = 0; i < eventcnt; ++i)
		290	event (EV_A_ events [i], type);
		291	}
		292
		293	static void
177	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
178	{	295	{
179	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	297	struct ev_io *w;
181		298
182	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
183	{	300	{
184	int ev = w->events & events;	301	int ev = w->events & events;
185		302
186	if (ev)	303	if (ev)
187	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
188	}	305	}
189	}	306	}
190		307
		308	/*****************************************************************************/
		309
191	static void	310	static void
192	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
193	{	312	{
194	int i;	313	int i;
195		314
196	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	316	{
		317	int fd = fdchanges [i];
		318	ANFD *anfd = anfds + fd;
		319	struct ev_io *w;
		320
		321	int events = 0;
		322
		323	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		324	events \|= w->events;
		325
		326	anfd->reify = 0;
		327
		328	method_modify (EV_A_ fd, anfd->events, events);
		329	anfd->events = events;
		330	}
		331
		332	fdchangecnt = 0;
		333	}
		334
		335	static void
		336	fd_change (EV_P_ int fd)
		337	{
		338	if (anfds [fd].reify \|\| fdchangecnt < 0)
		339	return;
		340
		341	anfds [fd].reify = 1;
		342
		343	++fdchangecnt;
		344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		345	fdchanges [fdchangecnt - 1] = fd;
		346	}
		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		357	}
198	}	358	}
199		359
200	/* called on EBADF to verify fds */	360	/* called on EBADF to verify fds */
201	static void	361	static void
202	fd_recheck (void)	362	fd_ebadf (EV_P)
203	{	363	{
204	int fd;	364	int fd;
205		365
206	for (fd = 0; fd < anfdmax; ++fd)	366	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	367	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)	369	fd_kill (EV_A_ fd);
		370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
210	{	380	{
211	event ((W)anfds [fd].head, EV_ERROR);	381	fd_kill (EV_A_ fd);
212	evio_stop (anfds [fd].head);	382	return;
213	}	383	}
		384	}
		385
		386	/* susually called after fork if method needs to re-arm all fds from scratch */
		387	static void
		388	fd_rearm_all (EV_P)
		389	{
		390	int fd;
		391
		392	/* this should be highly optimised to not do anything but set a flag */
		393	for (fd = 0; fd < anfdmax; ++fd)
		394	if (anfds [fd].events)
		395	{
		396	anfds [fd].events = 0;
		397	fd_change (EV_A_ fd);
		398	}
214	}	399	}
215		400
216	/*****************************************************************************/	401	/*****************************************************************************/
217		402
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void	403	static void
225	upheap (WT *timers, int k)	404	upheap (WT *heap, int k)
226	{	405	{
227	WT w = timers [k];	406	WT w = heap [k];
228		407
229	while (k && timers [k >> 1]->at > w->at)	408	while (k && heap [k >> 1]->at > w->at)
230	{	409	{
231	timers [k] = timers [k >> 1];	410	heap [k] = heap [k >> 1];
232	timers [k]->active = k + 1;	411	((W)heap [k])->active = k + 1;
233	k >>= 1;	412	k >>= 1;
234	}	413	}
235		414
236	timers [k] = w;	415	heap [k] = w;
237	timers [k]->active = k + 1;	416	((W)heap [k])->active = k + 1;
238		417
239	}	418	}
240		419
241	static void	420	static void
242	downheap (WT *timers, int N, int k)	421	downheap (WT *heap, int N, int k)
243	{	422	{
244	WT w = timers [k];	423	WT w = heap [k];
245		424
246	while (k < (N >> 1))	425	while (k < (N >> 1))
247	{	426	{
248	int j = k << 1;	427	int j = k << 1;
249		428
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
251	++j;	430	++j;
252		431
253	if (w->at <= timers [j]->at)	432	if (w->at <= heap [j]->at)
254	break;	433	break;
255		434
256	timers [k] = timers [j];	435	heap [k] = heap [j];
257	timers [k]->active = k + 1;	436	((W)heap [k])->active = k + 1;
258	k = j;	437	k = j;
259	}	438	}
260		439
261	timers [k] = w;	440	heap [k] = w;
262	timers [k]->active = k + 1;	441	((W)heap [k])->active = k + 1;
263	}	442	}
264		443
265	/*****************************************************************************/	444	/*****************************************************************************/
266		445
267	typedef struct	446	typedef struct
268	{	447	{
269	struct ev_signal *head;	448	WL head;
270	sig_atomic_t gotsig;	449	sig_atomic_t volatile gotsig;
271	} ANSIG;	450	} ANSIG;
272		451
273	static ANSIG *signals;	452	static ANSIG *signals;
274	static int signalmax;	453	static int signalmax;
275		454
276	static int sigpipe [2];	455	static int sigpipe [2];
277	static sig_atomic_t gotsig;	456	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	457	static struct ev_io sigev;
279		458
280	static void	459	static void
281	signals_init (ANSIG *base, int count)	460	signals_init (ANSIG *base, int count)
282	{	461	{
283	while (count--)	462	while (count--)
284	{	463	{
285	base->head = 0;	464	base->head = 0;
286	base->gotsig = 0;	465	base->gotsig = 0;
		466
287	++base;	467	++base;
288	}	468	}
289	}	469	}
290		470
291	static void	471	static void
292	sighandler (int signum)	472	sighandler (int signum)
293	{	473	{
		474	#if WIN32
		475	signal (signum, sighandler);
		476	#endif
		477
294	signals [signum - 1].gotsig = 1;	478	signals [signum - 1].gotsig = 1;
295		479
296	if (!gotsig)	480	if (!gotsig)
297	{	481	{
		482	int old_errno = errno;
298	gotsig = 1;	483	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	484	write (sigpipe [1], &signum, 1);
		485	errno = old_errno;
300	}	486	}
301	}	487	}
302		488
303	static void	489	static void
304	sigcb (struct ev_io *iow, int revents)	490	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	491	{
306	struct ev_signal *w;	492	WL w;
307	int sig;	493	int signum;
308		494
		495	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	496	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		497
312	for (sig = signalmax; sig--; )	498	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	499	if (signals [signum].gotsig)
314	{	500	{
315	signals [sig].gotsig = 0;	501	signals [signum].gotsig = 0;
316		502
317	for (w = signals [sig].head; w; w = w->next)	503	for (w = signals [signum].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);	504	event (EV_A_ (W)w, EV_SIGNAL);
319	}	505	}
320	}	506	}
321		507
322	static void	508	static void
323	siginit (void)	509	siginit (EV_P)
324	{	510	{
		511	#ifndef WIN32
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	512	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327		514
328	/* rather than sort out wether we really need nb, set it */	515	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		518	#endif
331		519
332	evio_set (&sigev, sigpipe [0], EV_READ);	520	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	521	ev_io_start (EV_A_ &sigev);
		522	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	523	}
335		524
336	/*****************************************************************************/	525	/*****************************************************************************/
337		526
338	static struct ev_idle **idles;	527	#ifndef WIN32
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348		528
349	static struct ev_child *childs [PID_HASHSIZE];	529	static struct ev_child *childs [PID_HASHSIZE];
350	static struct ev_signal childev;	530	static struct ev_signal childev;
351		531
352	#ifndef WCONTINUED	532	#ifndef WCONTINUED
353	# define WCONTINUED 0	533	# define WCONTINUED 0
354	#endif	534	#endif
355		535
356	static void	536	static void
357	childcb (struct ev_signal *sw, int revents)	537	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	538	{
359	struct ev_child *w;	539	struct ev_child *w;
		540
		541	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		542	if (w->pid == pid \|\| !w->pid)
		543	{
		544	ev_priority (w) = ev_priority (sw); /* need to do it now */
		545	w->rpid = pid;
		546	w->rstatus = status;
		547	event (EV_A_ (W)w, EV_CHILD);
		548	}
		549	}
		550
		551	static void
		552	childcb (EV_P_ struct ev_signal *sw, int revents)
		553	{
360	int pid, status;	554	int pid, status;
361		555
362	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	556	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	557	{
364	if (w->pid == pid \|\| w->pid == -1)	558	/* make sure we are called again until all childs have been reaped */
365	{	559	event (EV_A_ (W)sw, EV_SIGNAL);
366	w->status = status;	560
367	event ((W)w, EV_CHILD);	561	child_reap (EV_A_ sw, pid, pid, status);
368	}	562	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		563	}
369	}	564	}
		565
		566	#endif
370		567
371	/*****************************************************************************/	568	/*****************************************************************************/
372		569
		570	#if EV_USE_KQUEUE
		571	# include "ev_kqueue.c"
		572	#endif
373	#if HAVE_EPOLL	573	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	574	# include "ev_epoll.c"
375	#endif	575	#endif
		576	#if EV_USE_POLL
		577	# include "ev_poll.c"
		578	#endif
376	#if HAVE_SELECT	579	#if EV_USE_SELECT
377	# include "ev_select.c"	580	# include "ev_select.c"
378	#endif	581	#endif
379		582
380	int	583	int
381	ev_version_major (void)	584	ev_version_major (void)
…		…
387	ev_version_minor (void)	590	ev_version_minor (void)
388	{	591	{
389	return EV_VERSION_MINOR;	592	return EV_VERSION_MINOR;
390	}	593	}
391		594
392	int ev_init (int flags)	595	/* return true if we are running with elevated privileges and should ignore env variables */
		596	static int
		597	enable_secure (void)
393	{	598	{
		599	#ifdef WIN32
		600	return 0;
		601	#else
		602	return getuid () != geteuid ()
		603	\|\| getgid () != getegid ();
		604	#endif
		605	}
		606
		607	int
		608	ev_method (EV_P)
		609	{
		610	return method;
		611	}
		612
		613	static void
		614	loop_init (EV_P_ int methods)
		615	{
394	if (!ev_method)	616	if (!method)
395	{	617	{
396	#if HAVE_MONOTONIC	618	#if EV_USE_MONOTONIC
397	{	619	{
398	struct timespec ts;	620	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	621	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	622	have_monotonic = 1;
401	}	623	}
402	#endif	624	#endif
403		625
404	ev_now = ev_time ();	626	rt_now = ev_time ();
405	now = get_clock ();	627	mn_now = get_clock ();
		628	now_floor = mn_now;
406	diff = ev_now - now;	629	rtmn_diff = rt_now - mn_now;
407		630
		631	if (methods == EVMETHOD_AUTO)
		632	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		633	methods = atoi (getenv ("LIBEV_METHODS"));
		634	else
		635	methods = EVMETHOD_ANY;
		636
		637	method = 0;
		638	#if EV_USE_WIN32
		639	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		640	#endif
		641	#if EV_USE_KQUEUE
		642	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		643	#endif
		644	#if EV_USE_EPOLL
		645	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		646	#endif
		647	#if EV_USE_POLL
		648	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		649	#endif
		650	#if EV_USE_SELECT
		651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		652	#endif
		653	}
		654	}
		655
		656	void
		657	loop_destroy (EV_P)
		658	{
		659	int i;
		660
		661	#if EV_USE_WIN32
		662	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		663	#endif
		664	#if EV_USE_KQUEUE
		665	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		666	#endif
		667	#if EV_USE_EPOLL
		668	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		669	#endif
		670	#if EV_USE_POLL
		671	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		672	#endif
		673	#if EV_USE_SELECT
		674	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		675	#endif
		676
		677	for (i = NUMPRI; i--; )
		678	array_free (pending, [i]);
		679
		680	array_free (fdchange, );
		681	array_free (timer, );
		682	array_free (periodic, );
		683	array_free (idle, );
		684	array_free (prepare, );
		685	array_free (check, );
		686
		687	method = 0;
		688	/TODO/
		689	}
		690
		691	void
		692	loop_fork (EV_P)
		693	{
		694	/TODO/
		695	#if EV_USE_EPOLL
		696	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		697	#endif
		698	#if EV_USE_KQUEUE
		699	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		700	#endif
		701	}
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop *
		705	ev_loop_new (int methods)
		706	{
		707	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		708
		709	loop_init (EV_A_ methods);
		710
		711	if (ev_method (EV_A))
		712	return loop;
		713
		714	return 0;
		715	}
		716
		717	void
		718	ev_loop_destroy (EV_P)
		719	{
		720	loop_destroy (EV_A);
		721	free (loop);
		722	}
		723
		724	void
		725	ev_loop_fork (EV_P)
		726	{
		727	loop_fork (EV_A);
		728	}
		729
		730	#endif
		731
		732	#if EV_MULTIPLICITY
		733	struct ev_loop default_loop_struct;
		734	static struct ev_loop *default_loop;
		735
		736	struct ev_loop *
		737	#else
		738	static int default_loop;
		739
		740	int
		741	#endif
		742	ev_default_loop (int methods)
		743	{
		744	if (sigpipe [0] == sigpipe [1])
408	if (pipe (sigpipe))	745	if (pipe (sigpipe))
409	return 0;	746	return 0;
410		747
411	ev_method = EVMETHOD_NONE;	748	if (!default_loop)
412	#if HAVE_EPOLL	749	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	750	#if EV_MULTIPLICITY
		751	struct ev_loop *loop = default_loop = &default_loop_struct;
		752	#else
		753	default_loop = 1;
414	#endif	754	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		755
		756	loop_init (EV_A_ methods);
		757
419	if (ev_method)	758	if (ev_method (EV_A))
420	{	759	{
421	evw_init (&sigev, sigcb);	760	ev_watcher_init (&sigev, sigcb);
		761	ev_set_priority (&sigev, EV_MAXPRI);
422	siginit ();	762	siginit (EV_A);
423		763
		764	#ifndef WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	765	ev_signal_init (&childev, childcb, SIGCHLD);
		766	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	767	ev_signal_start (EV_A_ &childev);
		768	ev_unref (EV_A); /* child watcher should not keep loop alive */
		769	#endif
426	}	770	}
		771	else
		772	default_loop = 0;
427	}	773	}
428		774
429	return ev_method;	775	return default_loop;
430	}	776	}
431		777
432	/*****************************************************************************/
433
434	void	778	void
435	ev_prefork (void)	779	ev_default_destroy (void)
436	{	780	{
437	/* nop */	781	#if EV_MULTIPLICITY
438	}	782	struct ev_loop *loop = default_loop;
439
440	void
441	ev_postfork_parent (void)
442	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif	783	#endif
453		784
		785	ev_ref (EV_A); /* child watcher */
		786	ev_signal_stop (EV_A_ &childev);
		787
		788	ev_ref (EV_A); /* signal watcher */
454	evio_stop (&sigev);	789	ev_io_stop (EV_A_ &sigev);
		790
		791	close (sigpipe [0]); sigpipe [0] = 0;
		792	close (sigpipe [1]); sigpipe [1] = 0;
		793
		794	loop_destroy (EV_A);
		795	}
		796
		797	void
		798	ev_default_fork (void)
		799	{
		800	#if EV_MULTIPLICITY
		801	struct ev_loop *loop = default_loop;
		802	#endif
		803
		804	loop_fork (EV_A);
		805
		806	ev_io_stop (EV_A_ &sigev);
455	close (sigpipe [0]);	807	close (sigpipe [0]);
456	close (sigpipe [1]);	808	close (sigpipe [1]);
457	pipe (sigpipe);	809	pipe (sigpipe);
		810
		811	ev_ref (EV_A); /* signal watcher */
458	siginit ();	812	siginit (EV_A);
459	}	813	}
460		814
461	/*****************************************************************************/	815	/*****************************************************************************/
462		816
463	static void	817	static void
464	fd_reify (void)	818	call_pending (EV_P)
465	{	819	{
466	int i;	820	int pri;
467		821
468	for (i = 0; i < fdchangecnt; ++i)	822	for (pri = NUMPRI; pri--; )
469	{	823	while (pendingcnt [pri])
470	int fd = fdchanges [i];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473
474	int wev = 0;
475
476	for (w = anfd->head; w; w = w->next)
477	wev \|= w->events;
478
479	if (anfd->wev != wev)
480	{	824	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;	825	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
495		826
496	if (p->w)	827	if (p->w)
497	{	828	{
498	p->w->pending = 0;	829	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	830	p->w->cb (EV_A_ p->w, p->events);
500	}	831	}
501	}	832	}
502	}	833	}
503		834
504	static void	835	static void
505	timers_reify (void)	836	timers_reify (EV_P)
506	{	837	{
507	while (timercnt && timers [0]->at <= now)	838	while (timercnt && ((WT)timers [0])->at <= mn_now)
508	{	839	{
509	struct ev_timer *w = timers [0];	840	struct ev_timer *w = timers [0];
510		841
511	event ((W)w, EV_TIMEOUT);	842	assert (("inactive timer on timer heap detected", ev_is_active (w)));
512		843
513	/* first reschedule or stop timer */	844	/* first reschedule or stop timer */
514	if (w->repeat)	845	if (w->repeat)
515	{	846	{
		847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
516	w->at = now + w->repeat;	848	((WT)w)->at = mn_now + w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));
518	downheap ((WT *)timers, timercnt, 0);	849	downheap ((WT *)timers, timercnt, 0);
519	}	850	}
520	else	851	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		853
		854	event (EV_A_ (W)w, EV_TIMEOUT);
		855	}
		856	}
		857
525	static void	858	static void
526	periodics_reify (void)	859	periodics_reify (EV_P)
527	{	860	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
529	{	862	{
530	struct ev_periodic *w = periodics [0];	863	struct ev_periodic *w = periodics [0];
		864
		865	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
531		866
532	/* first reschedule or stop timer */	867	/* first reschedule or stop timer */
533	if (w->interval)	868	if (w->interval)
534	{	869	{
535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	870	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	871	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
537	downheap ((WT *)periodics, periodiccnt, 0);	872	downheap ((WT *)periodics, periodiccnt, 0);
538	}	873	}
539	else	874	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		876
542	event ((W)w, EV_TIMEOUT);	877	event (EV_A_ (W)w, EV_PERIODIC);
543	}	878	}
544	}	879	}
545		880
546	static void	881	static void
547	periodics_reschedule (ev_tstamp diff)	882	periodics_reschedule (EV_P)
548	{	883	{
549	int i;	884	int i;
550		885
551	/* adjust periodics after time jump */	886	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	887	for (i = 0; i < periodiccnt; ++i)
553	{	888	{
554	struct ev_periodic *w = periodics [i];	889	struct ev_periodic *w = periodics [i];
555		890
556	if (w->interval)	891	if (w->interval)
557	{	892	{
558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	893	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
559		894
560	if (fabs (diff) >= 1e-4)	895	if (fabs (diff) >= 1e-4)
561	{	896	{
562	evperiodic_stop (w);	897	ev_periodic_stop (EV_A_ w);
563	evperiodic_start (w);	898	ev_periodic_start (EV_A_ w);
564		899
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	900	i = 0; /* restart loop, inefficient, but time jumps should be rare */
566	}	901	}
567	}	902	}
568	}	903	}
569	}	904	}
570		905
		906	inline int
		907	time_update_monotonic (EV_P)
		908	{
		909	mn_now = get_clock ();
		910
		911	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		912	{
		913	rt_now = rtmn_diff + mn_now;
		914	return 0;
		915	}
		916	else
		917	{
		918	now_floor = mn_now;
		919	rt_now = ev_time ();
		920	return 1;
		921	}
		922	}
		923
571	static void	924	static void
572	time_update (void)	925	time_update (EV_P)
573	{	926	{
574	int i;	927	int i;
575		928
576	ev_now = ev_time ();	929	#if EV_USE_MONOTONIC
577
578	if (have_monotonic)	930	if (expect_true (have_monotonic))
579	{	931	{
580	ev_tstamp odiff = diff;	932	if (time_update_monotonic (EV_A))
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	933	{
584	now = get_clock ();	934	ev_tstamp odiff = rtmn_diff;
		935
		936	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		937	{
585	diff = ev_now - now;	938	rtmn_diff = rt_now - mn_now;
586		939
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)	940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
588	return; /* all is well */	941	return; /* all is well */
589		942
590	ev_now = ev_time ();	943	rt_now = ev_time ();
		944	mn_now = get_clock ();
		945	now_floor = mn_now;
		946	}
		947
		948	periodics_reschedule (EV_A);
		949	/* no timer adjustment, as the monotonic clock doesn't jump */
		950	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
591	}	951	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}	952	}
596	else	953	else
		954	#endif
597	{	955	{
598	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	956	rt_now = ev_time ();
		957
		958	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
599	{	959	{
600	periodics_reschedule (ev_now - now);	960	periodics_reschedule (EV_A);
601		961
602	/* adjust timers. this is easy, as the offset is the same for all */	962	/* adjust timers. this is easy, as the offset is the same for all */
603	for (i = 0; i < timercnt; ++i)	963	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	964	((WT)timers [i])->at += rt_now - mn_now;
605	}	965	}
606		966
607	now = ev_now;	967	mn_now = rt_now;
608	}	968	}
609	}	969	}
610		970
611	int ev_loop_done;	971	void
		972	ev_ref (EV_P)
		973	{
		974	++activecnt;
		975	}
612		976
		977	void
		978	ev_unref (EV_P)
		979	{
		980	--activecnt;
		981	}
		982
		983	static int loop_done;
		984
		985	void
613	void ev_loop (int flags)	986	ev_loop (EV_P_ int flags)
614	{	987	{
615	double block;	988	double block;
616	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	989	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
617		990
618	do	991	do
619	{	992	{
620	/* queue check watchers (and execute them) */	993	/* queue check watchers (and execute them) */
621	if (preparecnt)	994	if (expect_false (preparecnt))
622	{	995	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	996	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	997	call_pending (EV_A);
625	}	998	}
626		999
627	/* update fd-related kernel structures */	1000	/* update fd-related kernel structures */
628	fd_reify ();	1001	fd_reify (EV_A);
629		1002
630	/* calculate blocking time */	1003	/* calculate blocking time */
631		1004
632	/* we only need this for !monotonic clockor timers, but as we basically	1005	/* we only need this for !monotonic clockor timers, but as we basically
633	always have timers, we just calculate it always */	1006	always have timers, we just calculate it always */
		1007	#if EV_USE_MONOTONIC
		1008	if (expect_true (have_monotonic))
		1009	time_update_monotonic (EV_A);
		1010	else
		1011	#endif
		1012	{
634	ev_now = ev_time ();	1013	rt_now = ev_time ();
		1014	mn_now = rt_now;
		1015	}
635		1016
636	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1017	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
637	block = 0.;	1018	block = 0.;
638	else	1019	else
639	{	1020	{
640	block = MAX_BLOCKTIME;	1021	block = MAX_BLOCKTIME;
641		1022
642	if (timercnt)	1023	if (timercnt)
643	{	1024	{
644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1025	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
645	if (block > to) block = to;	1026	if (block > to) block = to;
646	}	1027	}
647		1028
648	if (periodiccnt)	1029	if (periodiccnt)
649	{	1030	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
651	if (block > to) block = to;	1032	if (block > to) block = to;
652	}	1033	}
653		1034
654	if (block < 0.) block = 0.;	1035	if (block < 0.) block = 0.;
655	}	1036	}
656		1037
657	method_poll (block);	1038	method_poll (EV_A_ block);
658		1039
659	/* update ev_now, do magic */	1040	/* update rt_now, do magic */
660	time_update ();	1041	time_update (EV_A);
661		1042
662	/* queue pending timers and reschedule them */	1043	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1044	timers_reify (EV_A); /* relative timers called last */
664	periodics_reify (); /* absolute timers called first */	1045	periodics_reify (EV_A); /* absolute timers called first */
665		1046
666	/* queue idle watchers unless io or timers are pending */	1047	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	1048	if (!pendingcnt)
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1049	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		1050
670	/* queue check watchers, to be executed first */	1051	/* queue check watchers, to be executed first */
671	if (checkcnt)	1052	if (checkcnt)
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1053	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1054
674	call_pending ();	1055	call_pending (EV_A);
675	}	1056	}
676	while (!ev_loop_done);	1057	while (activecnt && !loop_done);
677		1058
678	if (ev_loop_done != 2)	1059	if (loop_done != 2)
679	ev_loop_done = 0;	1060	loop_done = 0;
		1061	}
		1062
		1063	void
		1064	ev_unloop (EV_P_ int how)
		1065	{
		1066	loop_done = how;
680	}	1067	}
681		1068
682	/*****************************************************************************/	1069	/*****************************************************************************/
683		1070
684	static void	1071	inline void
685	wlist_add (WL *head, WL elem)	1072	wlist_add (WL *head, WL elem)
686	{	1073	{
687	elem->next = *head;	1074	elem->next = *head;
688	*head = elem;	1075	*head = elem;
689	}	1076	}
690		1077
691	static void	1078	inline void
692	wlist_del (WL *head, WL elem)	1079	wlist_del (WL *head, WL elem)
693	{	1080	{
694	while (*head)	1081	while (*head)
695	{	1082	{
696	if (*head == elem)	1083	if (*head == elem)
…		…
701		1088
702	head = &(*head)->next;	1089	head = &(*head)->next;
703	}	1090	}
704	}	1091	}
705		1092
706	static void	1093	inline void
707	ev_clear (W w)	1094	ev_clear_pending (EV_P_ W w)
708	{	1095	{
709	if (w->pending)	1096	if (w->pending)
710	{	1097	{
711	pendings [w->pending - 1].w = 0;	1098	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1099	w->pending = 0;
713	}	1100	}
714	}	1101	}
715		1102
716	static void	1103	inline void
717	ev_start (W w, int active)	1104	ev_start (EV_P_ W w, int active)
718	{	1105	{
		1106	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1107	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1108
719	w->active = active;	1109	w->active = active;
		1110	ev_ref (EV_A);
720	}	1111	}
721		1112
722	static void	1113	inline void
723	ev_stop (W w)	1114	ev_stop (EV_P_ W w)
724	{	1115	{
		1116	ev_unref (EV_A);
725	w->active = 0;	1117	w->active = 0;
726	}	1118	}
727		1119
728	/*****************************************************************************/	1120	/*****************************************************************************/
729		1121
730	void	1122	void
731	evio_start (struct ev_io *w)	1123	ev_io_start (EV_P_ struct ev_io *w)
732	{	1124	{
		1125	int fd = w->fd;
		1126
733	if (ev_is_active (w))	1127	if (ev_is_active (w))
734	return;	1128	return;
735		1129
736	int fd = w->fd;	1130	assert (("ev_io_start called with negative fd", fd >= 0));
737		1131
738	ev_start ((W)w, 1);	1132	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1133	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1134	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1135
742	++fdchangecnt;	1136	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745	}	1137	}
746		1138
747	void	1139	void
748	evio_stop (struct ev_io *w)	1140	ev_io_stop (EV_P_ struct ev_io *w)
749	{	1141	{
750	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
751	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
752	return;	1144	return;
753		1145
754	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1146	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
755	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
756		1148
757	++fdchangecnt;	1149	fd_change (EV_A_ w->fd);
758	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
759	fdchanges [fdchangecnt - 1] = w->fd;
760	}	1150	}
761		1151
762	void	1152	void
763	evtimer_start (struct ev_timer *w)	1153	ev_timer_start (EV_P_ struct ev_timer *w)
764	{	1154	{
765	if (ev_is_active (w))	1155	if (ev_is_active (w))
766	return;	1156	return;
767		1157
768	w->at += now;	1158	((WT)w)->at += mn_now;
769		1159
770	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1160	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
771		1161
772	ev_start ((W)w, ++timercnt);	1162	ev_start (EV_A_ (W)w, ++timercnt);
773	array_needsize (timers, timermax, timercnt, );	1163	array_needsize (timers, timermax, timercnt, );
774	timers [timercnt - 1] = w;	1164	timers [timercnt - 1] = w;
775	upheap ((WT *)timers, timercnt - 1);	1165	upheap ((WT *)timers, timercnt - 1);
776	}
777		1166
		1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1168	}
		1169
778	void	1170	void
779	evtimer_stop (struct ev_timer *w)	1171	ev_timer_stop (EV_P_ struct ev_timer *w)
780	{	1172	{
781	ev_clear ((W)w);	1173	ev_clear_pending (EV_A_ (W)w);
782	if (!ev_is_active (w))	1174	if (!ev_is_active (w))
783	return;	1175	return;
784		1176
		1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1178
785	if (w->active < timercnt--)	1179	if (((W)w)->active < timercnt--)
786	{	1180	{
787	timers [w->active - 1] = timers [timercnt];	1181	timers [((W)w)->active - 1] = timers [timercnt];
788	downheap ((WT *)timers, timercnt, w->active - 1);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
789	}	1183	}
790		1184
791	w->at = w->repeat;	1185	((WT)w)->at = w->repeat;
792		1186
793	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
794	}	1188	}
795		1189
796	void	1190	void
797	evtimer_again (struct ev_timer *w)	1191	ev_timer_again (EV_P_ struct ev_timer *w)
798	{	1192	{
799	if (ev_is_active (w))	1193	if (ev_is_active (w))
800	{	1194	{
801	if (w->repeat)	1195	if (w->repeat)
802	{	1196	{
803	w->at = now + w->repeat;	1197	((WT)w)->at = mn_now + w->repeat;
804	downheap ((WT *)timers, timercnt, w->active - 1);	1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
805	}	1199	}
806	else	1200	else
807	evtimer_stop (w);	1201	ev_timer_stop (EV_A_ w);
808	}	1202	}
809	else if (w->repeat)	1203	else if (w->repeat)
810	evtimer_start (w);	1204	ev_timer_start (EV_A_ w);
811	}	1205	}
812		1206
813	void	1207	void
814	evperiodic_start (struct ev_periodic *w)	1208	ev_periodic_start (EV_P_ struct ev_periodic *w)
815	{	1209	{
816	if (ev_is_active (w))	1210	if (ev_is_active (w))
817	return;	1211	return;
818		1212
819	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1213	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
820		1214
821	/* this formula differs from the one in periodic_reify because we do not always round up */	1215	/* this formula differs from the one in periodic_reify because we do not always round up */
822	if (w->interval)	1216	if (w->interval)
823	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1217	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
824		1218
825	ev_start ((W)w, ++periodiccnt);	1219	ev_start (EV_A_ (W)w, ++periodiccnt);
826	array_needsize (periodics, periodicmax, periodiccnt, );	1220	array_needsize (periodics, periodicmax, periodiccnt, );
827	periodics [periodiccnt - 1] = w;	1221	periodics [periodiccnt - 1] = w;
828	upheap ((WT *)periodics, periodiccnt - 1);	1222	upheap ((WT *)periodics, periodiccnt - 1);
829	}
830		1223
		1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1225	}
		1226
831	void	1227	void
832	evperiodic_stop (struct ev_periodic *w)	1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)
833	{	1229	{
834	ev_clear ((W)w);	1230	ev_clear_pending (EV_A_ (W)w);
835	if (!ev_is_active (w))	1231	if (!ev_is_active (w))
836	return;	1232	return;
837		1233
		1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1235
838	if (w->active < periodiccnt--)	1236	if (((W)w)->active < periodiccnt--)
839	{	1237	{
840	periodics [w->active - 1] = periodics [periodiccnt];	1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];
841	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
842	}	1240	}
843		1241
844	ev_stop ((W)w);	1242	ev_stop (EV_A_ (W)w);
845	}	1243	}
846		1244
847	void	1245	void
848	evsignal_start (struct ev_signal *w)	1246	ev_idle_start (EV_P_ struct ev_idle *w)
849	{	1247	{
850	if (ev_is_active (w))	1248	if (ev_is_active (w))
851	return;	1249	return;
852		1250
		1251	ev_start (EV_A_ (W)w, ++idlecnt);
		1252	array_needsize (idles, idlemax, idlecnt, );
		1253	idles [idlecnt - 1] = w;
		1254	}
		1255
		1256	void
		1257	ev_idle_stop (EV_P_ struct ev_idle *w)
		1258	{
		1259	ev_clear_pending (EV_A_ (W)w);
		1260	if (ev_is_active (w))
		1261	return;
		1262
		1263	idles [((W)w)->active - 1] = idles [--idlecnt];
		1264	ev_stop (EV_A_ (W)w);
		1265	}
		1266
		1267	void
		1268	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1269	{
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	ev_start (EV_A_ (W)w, ++preparecnt);
		1274	array_needsize (prepares, preparemax, preparecnt, );
		1275	prepares [preparecnt - 1] = w;
		1276	}
		1277
		1278	void
		1279	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1280	{
		1281	ev_clear_pending (EV_A_ (W)w);
		1282	if (ev_is_active (w))
		1283	return;
		1284
		1285	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1286	ev_stop (EV_A_ (W)w);
		1287	}
		1288
		1289	void
		1290	ev_check_start (EV_P_ struct ev_check *w)
		1291	{
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	ev_start (EV_A_ (W)w, ++checkcnt);
		1296	array_needsize (checks, checkmax, checkcnt, );
		1297	checks [checkcnt - 1] = w;
		1298	}
		1299
		1300	void
		1301	ev_check_stop (EV_P_ struct ev_check *w)
		1302	{
		1303	ev_clear_pending (EV_A_ (W)w);
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	checks [((W)w)->active - 1] = checks [--checkcnt];
		1308	ev_stop (EV_A_ (W)w);
		1309	}
		1310
		1311	#ifndef SA_RESTART
		1312	# define SA_RESTART 0
		1313	#endif
		1314
		1315	void
		1316	ev_signal_start (EV_P_ struct ev_signal *w)
		1317	{
		1318	#if EV_MULTIPLICITY
		1319	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1320	#endif
		1321	if (ev_is_active (w))
		1322	return;
		1323
		1324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1325
853	ev_start ((W)w, 1);	1326	ev_start (EV_A_ (W)w, 1);
854	array_needsize (signals, signalmax, w->signum, signals_init);	1327	array_needsize (signals, signalmax, w->signum, signals_init);
855	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
856		1329
857	if (!w->next)	1330	if (!((WL)w)->next)
858	{	1331	{
		1332	#if WIN32
		1333	signal (w->signum, sighandler);
		1334	#else
859	struct sigaction sa;	1335	struct sigaction sa;
860	sa.sa_handler = sighandler;	1336	sa.sa_handler = sighandler;
861	sigfillset (&sa.sa_mask);	1337	sigfillset (&sa.sa_mask);
862	sa.sa_flags = 0;	1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
863	sigaction (w->signum, &sa, 0);	1339	sigaction (w->signum, &sa, 0);
		1340	#endif
864	}	1341	}
865	}	1342	}
866		1343
867	void	1344	void
868	evsignal_stop (struct ev_signal *w)	1345	ev_signal_stop (EV_P_ struct ev_signal *w)
869	{	1346	{
870	ev_clear ((W)w);	1347	ev_clear_pending (EV_A_ (W)w);
871	if (!ev_is_active (w))	1348	if (!ev_is_active (w))
872	return;	1349	return;
873		1350
874	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1351	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
875	ev_stop ((W)w);	1352	ev_stop (EV_A_ (W)w);
876		1353
877	if (!signals [w->signum - 1].head)	1354	if (!signals [w->signum - 1].head)
878	signal (w->signum, SIG_DFL);	1355	signal (w->signum, SIG_DFL);
879	}	1356	}
880		1357
881	void evidle_start (struct ev_idle *w)	1358	void
		1359	ev_child_start (EV_P_ struct ev_child *w)
882	{	1360	{
		1361	#if EV_MULTIPLICITY
		1362	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1363	#endif
883	if (ev_is_active (w))	1364	if (ev_is_active (w))
884	return;	1365	return;
885		1366
886	ev_start ((W)w, ++idlecnt);	1367	ev_start (EV_A_ (W)w, 1);
887	array_needsize (idles, idlemax, idlecnt, );	1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
888	idles [idlecnt - 1] = w;
889	}	1369	}
890		1370
891	void evidle_stop (struct ev_idle *w)	1371	void
		1372	ev_child_stop (EV_P_ struct ev_child *w)
892	{	1373	{
893	ev_clear ((W)w);	1374	ev_clear_pending (EV_A_ (W)w);
894	if (ev_is_active (w))	1375	if (ev_is_active (w))
895	return;	1376	return;
896		1377
897	idles [w->active - 1] = idles [--idlecnt];
898	ev_stop ((W)w);
899	}
900
901	void evprepare_start (struct ev_prepare *w)
902	{
903	if (ev_is_active (w))
904	return;
905
906	ev_start ((W)w, ++preparecnt);
907	array_needsize (prepares, preparemax, preparecnt, );
908	prepares [preparecnt - 1] = w;
909	}
910
911	void evprepare_stop (struct ev_prepare *w)
912	{
913	ev_clear ((W)w);
914	if (ev_is_active (w))
915	return;
916
917	prepares [w->active - 1] = prepares [--preparecnt];
918	ev_stop ((W)w);
919	}
920
921	void evcheck_start (struct ev_check *w)
922	{
923	if (ev_is_active (w))
924	return;
925
926	ev_start ((W)w, ++checkcnt);
927	array_needsize (checks, checkmax, checkcnt, );
928	checks [checkcnt - 1] = w;
929	}
930
931	void evcheck_stop (struct ev_check *w)
932	{
933	ev_clear ((W)w);
934	if (ev_is_active (w))
935	return;
936
937	checks [w->active - 1] = checks [--checkcnt];
938	ev_stop ((W)w);
939	}
940
941	void evchild_start (struct ev_child *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, 1);
947	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
948	}
949
950	void evchild_stop (struct ev_child *w)
951	{
952	ev_clear ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1378	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
957	ev_stop ((W)w);	1379	ev_stop (EV_A_ (W)w);
958	}	1380	}
959		1381
960	/*****************************************************************************/	1382	/*****************************************************************************/
961		1383
962	struct ev_once	1384	struct ev_once
…		…
966	void (cb)(int revents, void arg);	1388	void (cb)(int revents, void arg);
967	void *arg;	1389	void *arg;
968	};	1390	};
969		1391
970	static void	1392	static void
971	once_cb (struct ev_once *once, int revents)	1393	once_cb (EV_P_ struct ev_once *once, int revents)
972	{	1394	{
973	void (cb)(int revents, void arg) = once->cb;	1395	void (cb)(int revents, void arg) = once->cb;
974	void *arg = once->arg;	1396	void *arg = once->arg;
975		1397
976	evio_stop (&once->io);	1398	ev_io_stop (EV_A_ &once->io);
977	evtimer_stop (&once->to);	1399	ev_timer_stop (EV_A_ &once->to);
978	free (once);	1400	free (once);
979		1401
980	cb (revents, arg);	1402	cb (revents, arg);
981	}	1403	}
982		1404
983	static void	1405	static void
984	once_cb_io (struct ev_io *w, int revents)	1406	once_cb_io (EV_P_ struct ev_io *w, int revents)
985	{	1407	{
986	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1408	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
987	}	1409	}
988		1410
989	static void	1411	static void
990	once_cb_to (struct ev_timer *w, int revents)	1412	once_cb_to (EV_P_ struct ev_timer *w, int revents)
991	{	1413	{
992	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1414	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
993	}	1415	}
994		1416
995	void	1417	void
996	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1418	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
997	{	1419	{
998	struct ev_once *once = malloc (sizeof (struct ev_once));	1420	struct ev_once *once = malloc (sizeof (struct ev_once));
999		1421
1000	if (!once)	1422	if (!once)
1001	cb (EV_ERROR, arg);	1423	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1002	else	1424	else
1003	{	1425	{
1004	once->cb = cb;	1426	once->cb = cb;
1005	once->arg = arg;	1427	once->arg = arg;
1006		1428
1007	evw_init (&once->io, once_cb_io);	1429	ev_watcher_init (&once->io, once_cb_io);
1008
1009	if (fd >= 0)	1430	if (fd >= 0)
1010	{	1431	{
1011	evio_set (&once->io, fd, events);	1432	ev_io_set (&once->io, fd, events);
1012	evio_start (&once->io);	1433	ev_io_start (EV_A_ &once->io);
1013	}	1434	}
1014		1435
1015	evw_init (&once->to, once_cb_to);	1436	ev_watcher_init (&once->to, once_cb_to);
1016
1017	if (timeout >= 0.)	1437	if (timeout >= 0.)
1018	{	1438	{
1019	evtimer_set (&once->to, timeout, 0.);	1439	ev_timer_set (&once->to, timeout, 0.);
1020	evtimer_start (&once->to);	1440	ev_timer_start (EV_A_ &once->to);
1021	}	1441	}
1022	}	1442	}
1023	}	1443	}
1024		1444
1025	/*****************************************************************************/
1026
1027	#if 0
1028
1029	struct ev_io wio;
1030
1031	static void
1032	sin_cb (struct ev_io *w, int revents)
1033	{
1034	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1035	}
1036
1037	static void
1038	ocb (struct ev_timer *w, int revents)
1039	{
1040	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1041	evtimer_stop (w);
1042	evtimer_start (w);
1043	}
1044
1045	static void
1046	scb (struct ev_signal *w, int revents)
1047	{
1048	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1049	evio_stop (&wio);
1050	evio_start (&wio);
1051	}
1052
1053	static void
1054	gcb (struct ev_signal *w, int revents)
1055	{
1056	fprintf (stderr, "generic %x\n", revents);
1057
1058	}
1059
1060	int main (void)
1061	{
1062	ev_init (0);
1063
1064	evio_init (&wio, sin_cb, 0, EV_READ);
1065	evio_start (&wio);
1066
1067	struct ev_timer t[10000];
1068
1069	#if 0
1070	int i;
1071	for (i = 0; i < 10000; ++i)
1072	{
1073	struct ev_timer *w = t + i;
1074	evw_init (w, ocb, i);
1075	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1076	evtimer_start (w);
1077	if (drand48 () < 0.5)
1078	evtimer_stop (w);
1079	}
1080	#endif
1081
1082	struct ev_timer t1;
1083	evtimer_init (&t1, ocb, 5, 10);
1084	evtimer_start (&t1);
1085
1086	struct ev_signal sig;
1087	evsignal_init (&sig, scb, SIGQUIT);
1088	evsignal_start (&sig);
1089
1090	struct ev_check cw;
1091	evcheck_init (&cw, gcb);
1092	evcheck_start (&cw);
1093
1094	struct ev_idle iw;
1095	evidle_init (&iw, gcb);
1096	evidle_start (&iw);
1097
1098	ev_loop (0);
1099
1100	return 0;
1101	}
1102
1103	#endif
1104
1105
1106
1107

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Comparing libev/ev.c (file contents): Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs. Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC