ViewVC Help

View File | Revision Log | Show Annotations | Download File

/cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 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	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>	59	#include <unistd.h>
…		…
40	#include <stdio.h>	64	#include <stdio.h>
41		65
42	#include <assert.h>	66	#include <assert.h>
43	#include <errno.h>	67	#include <errno.h>
44	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
45	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
46	#include <sys/time.h>	72	#include <sys/time.h>
47	#include <time.h>	73	#include <time.h>
48		74
		75	/**/
		76
49	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	79	#endif
54		80
55	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
57	#endif	83	#endif
58		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
59	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
61	#endif	91	#endif
62		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
63	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
65	#endif	119	#endif
66	#ifndef EV_USE_REALTIME	120
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
68	#endif
69		122
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		127
75	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		143
77	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
80		147
81	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84		149
85	static int have_monotonic; /* runtime */	150	#if WIN32
86		151	/* note: the comment below could not be substantiated, but what would I care */
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
88	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
89	static void (*method_poll)(ev_tstamp timeout);	154	#endif
90		155
91	/*****************************************************************************/	156	/*****************************************************************************/
92		157
93	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
94	ev_time (void)	192	ev_time (void)
95	{	193	{
96	#if EV_USE_REALTIME	194	#if EV_USE_REALTIME
97	struct timespec ts;	195	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	202	#endif
105	}	203	}
106		204
107	static ev_tstamp	205	inline ev_tstamp
108	get_clock (void)	206	get_clock (void)
109	{	207	{
110	#if EV_USE_MONOTONIC	208	#if EV_USE_MONOTONIC
111	if (have_monotonic)	209	if (expect_true (have_monotonic))
112	{	210	{
113	struct timespec ts;	211	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	214	}
117	#endif	215	#endif
118		216
119	return ev_time ();	217	return ev_time ();
120	}	218	}
121		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	226	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		227
124	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
126	{ \	230	{ \
127	int newcnt = cur; \	231	int newcnt = cur; \
128	do \	232	do \
129	{ \	233	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	234	newcnt = array_roundsize (base, newcnt << 1); \
…		…
134	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
135	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	240	cur = newcnt; \
137	}	241	}
138		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
139	/*****************************************************************************/	254	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149		255
150	static void	256	static void
151	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
152	{	258	{
153	while (count--)	259	while (count--)
154	{	260	{
155	base->head = 0;	261	base->head = 0;
156	base->events = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
157	++base;	265	++base;
158	}	266	}
159	}	267	}
160		268
161	typedef struct
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void	269	static void
171	event (W w, int events)	270	event (EV_P_ W w, int events)
172	{	271	{
		272	if (w->pending)
		273	{
		274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		275	return;
		276	}
		277
173	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
174	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
175	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
176	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
177	}	282	}
178		283
179	static void	284	static void
180	queue_events (W *events, int eventcnt, int type)	285	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	286	{
182	int i;	287	int i;
183		288
184	for (i = 0; i < eventcnt; ++i)	289	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	290	event (EV_A_ events [i], type);
186	}	291	}
187		292
188	static void	293	static void
189	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
190	{	295	{
191	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	297	struct ev_io *w;
193		298
194	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
195	{	300	{
196	int ev = w->events & events;	301	int ev = w->events & events;
197		302
198	if (ev)	303	if (ev)
199	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
200	}	305	}
201	}	306	}
202		307
203	/*****************************************************************************/	308	/*****************************************************************************/
204		309
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	310	static void
209	fd_reify (void)	311	fd_reify (EV_P)
210	{	312	{
211	int i;	313	int i;
212		314
213	for (i = 0; i < fdchangecnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
214	{	316	{
…		…
216	ANFD *anfd = anfds + fd;	318	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	319	struct ev_io *w;
218		320
219	int events = 0;	321	int events = 0;
220		322
221	for (w = anfd->head; w; w = w->next)	323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
222	events |= w->events;	324	events |= w->events;
223		325
224	anfd->events &= ~EV_REIFY;	326	anfd->reify = 0;
225		327
226	if (anfd->events != events)
227	{
228	method_modify (fd, anfd->events, events);	328	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	329	anfd->events = events;
230	}
231	}	330	}
232		331
233	fdchangecnt = 0;	332	fdchangecnt = 0;
234	}	333	}
235		334
236	static void	335	static void
237	fd_change (int fd)	336	fd_change (EV_P_ int fd)
238	{	337	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	338	if (anfds [fd].reify || fdchangecnt < 0)
240	return;	339	return;
241		340
242	anfds [fd].events |= EV_REIFY;	341	anfds [fd].reify = 1;
243		342
244	++fdchangecnt;	343	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
246	fdchanges [fdchangecnt - 1] = fd;	345	fdchanges [fdchangecnt - 1] = fd;
247	}	346	}
248		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	}
		358	}
		359
249	/* called on EBADF to verify fds */	360	/* called on EBADF to verify fds */
250	static void	361	static void
251	fd_recheck (void)	362	fd_ebadf (EV_P)
252	{	363	{
253	int fd;	364	int fd;
254		365
255	for (fd = 0; fd < anfdmax; ++fd)	366	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	367	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
258	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)
259	{	380	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	381	fd_kill (EV_A_ fd);
261	ev_io_stop (anfds [fd].head);	382	return;
262	}	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	}
263	}	399	}
264		400
265	/*****************************************************************************/	401	/*****************************************************************************/
266		402
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	403	static void
274	upheap (WT *timers, int k)	404	upheap (WT *heap, int k)
275	{	405	{
276	WT w = timers [k];	406	WT w = heap [k];
277		407
278	while (k && timers [k >> 1]->at > w->at)	408	while (k && heap [k >> 1]->at > w->at)
279	{	409	{
280	timers [k] = timers [k >> 1];	410	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	411	((W)heap [k])->active = k + 1;
282	k >>= 1;	412	k >>= 1;
283	}	413	}
284		414
285	timers [k] = w;	415	heap [k] = w;
286	timers [k]->active = k + 1;	416	((W)heap [k])->active = k + 1;
287		417
288	}	418	}
289		419
290	static void	420	static void
291	downheap (WT *timers, int N, int k)	421	downheap (WT *heap, int N, int k)
292	{	422	{
293	WT w = timers [k];	423	WT w = heap [k];
294		424
295	while (k < (N >> 1))	425	while (k < (N >> 1))
296	{	426	{
297	int j = k << 1;	427	int j = k << 1;
298		428
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	430	++j;
301		431
302	if (w->at <= timers [j]->at)	432	if (w->at <= heap [j]->at)
303	break;	433	break;
304		434
305	timers [k] = timers [j];	435	heap [k] = heap [j];
306	timers [k]->active = k + 1;	436	((W)heap [k])->active = k + 1;
307	k = j;	437	k = j;
308	}	438	}
309		439
310	timers [k] = w;	440	heap [k] = w;
311	timers [k]->active = k + 1;	441	((W)heap [k])->active = k + 1;
312	}	442	}
313		443
314	/*****************************************************************************/	444	/*****************************************************************************/
315		445
316	typedef struct	446	typedef struct
317	{	447	{
318	struct ev_signal *head;	448	WL head;
319	sig_atomic_t gotsig;	449	sig_atomic_t volatile gotsig;
320	} ANSIG;	450	} ANSIG;
321		451
322	static ANSIG *signals;	452	static ANSIG *signals;
323	static int signalmax;	453	static int signalmax;
324		454
325	static int sigpipe [2];	455	static int sigpipe [2];
326	static sig_atomic_t gotsig;	456	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	457	static struct ev_io sigev;
328		458
329	static void	459	static void
330	signals_init (ANSIG *base, int count)	460	signals_init (ANSIG *base, int count)
331	{	461	{
332	while (count--)	462	while (count--)
333	{	463	{
334	base->head = 0;	464	base->head = 0;
335	base->gotsig = 0;	465	base->gotsig = 0;
		466
336	++base;	467	++base;
337	}	468	}
338	}	469	}
339		470
340	static void	471	static void
341	sighandler (int signum)	472	sighandler (int signum)
342	{	473	{
		474	#if WIN32
		475	signal (signum, sighandler);
		476	#endif
		477
343	signals [signum - 1].gotsig = 1;	478	signals [signum - 1].gotsig = 1;
344		479
345	if (!gotsig)	480	if (!gotsig)
346	{	481	{
		482	int old_errno = errno;
347	gotsig = 1;	483	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	484	write (sigpipe [1], &signum, 1);
		485	errno = old_errno;
349	}	486	}
350	}	487	}
351		488
352	static void	489	static void
353	sigcb (struct ev_io *iow, int revents)	490	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	491	{
355	struct ev_signal *w;	492	WL w;
356	int sig;	493	int signum;
357		494
		495	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	496	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		497
361	for (sig = signalmax; sig--; )	498	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	499	if (signals [signum].gotsig)
363	{	500	{
364	signals [sig].gotsig = 0;	501	signals [signum].gotsig = 0;
365		502
366	for (w = signals [sig].head; w; w = w->next)	503	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	504	event (EV_A_ (W)w, EV_SIGNAL);
368	}	505	}
369	}	506	}
370		507
371	static void	508	static void
372	siginit (void)	509	siginit (EV_P)
373	{	510	{
		511	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	512	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		514
377	/* rather than sort out wether we really need nb, set it */	515	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		518	#endif
380		519
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	520	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	521	ev_io_start (EV_A_ &sigev);
		522	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	523	}
384		524
385	/*****************************************************************************/	525	/*****************************************************************************/
386		526
387	static struct ev_idle **idles;	527	#ifndef WIN32
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397		528
398	static struct ev_child *childs [PID_HASHSIZE];	529	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;	530	static struct ev_signal childev;
400		531
401	#ifndef WCONTINUED	532	#ifndef WCONTINUED
402	# define WCONTINUED 0	533	# define WCONTINUED 0
403	#endif	534	#endif
404		535
405	static void	536	static void
406	childcb (struct ev_signal *sw, int revents)	537	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	538	{
408	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	{
409	int pid, status;	554	int pid, status;
410		555
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	556	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	557	{
413	if (w->pid == pid || w->pid == -1)	558	/* make sure we are called again until all childs have been reaped */
414	{	559	event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	560
416	event ((W)w, EV_CHILD);	561	child_reap (EV_A_ sw, pid, pid, status);
417	}	562	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		563	}
418	}	564	}
		565
		566	#endif
419		567
420	/*****************************************************************************/	568	/*****************************************************************************/
421		569
		570	#if EV_USE_KQUEUE
		571	# include "ev_kqueue.c"
		572	#endif
422	#if EV_USE_EPOLL	573	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	574	# include "ev_epoll.c"
424	#endif	575	#endif
		576	#if EV_USE_POLL
		577	# include "ev_poll.c"
		578	#endif
425	#if EV_USE_SELECT	579	#if EV_USE_SELECT
426	# include "ev_select.c"	580	# include "ev_select.c"
427	#endif	581	#endif
428		582
429	int	583	int
…		…
436	ev_version_minor (void)	590	ev_version_minor (void)
437	{	591	{
438	return EV_VERSION_MINOR;	592	return EV_VERSION_MINOR;
439	}	593	}
440		594
441	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)
442	{	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	{
443	if (!ev_method)	616	if (!method)
444	{	617	{
445	#if EV_USE_MONOTONIC	618	#if EV_USE_MONOTONIC
446	{	619	{
447	struct timespec ts;	620	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	621	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	622	have_monotonic = 1;
450	}	623	}
451	#endif	624	#endif
452		625
453	ev_now = ev_time ();	626	rt_now = ev_time ();
454	now = get_clock ();	627	mn_now = get_clock ();
		628	now_floor = mn_now;
455	diff = ev_now - now;	629	rtmn_diff = rt_now - mn_now;
456		630
457	if (pipe (sigpipe))	631	if (methods == EVMETHOD_AUTO)
458	return 0;	632	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		633	methods = atoi (getenv ("LIBEV_METHODS"));
		634	else
460	ev_method = EVMETHOD_NONE;	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
461	#if EV_USE_EPOLL	644	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	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);
463	#endif	649	#endif
464	#if EV_USE_SELECT	650	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	652	#endif
		653	}
		654	}
467		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])
		745	if (pipe (sigpipe))
		746	return 0;
		747
		748	if (!default_loop)
		749	{
		750	#if EV_MULTIPLICITY
		751	struct ev_loop *loop = default_loop = &default_loop_struct;
		752	#else
		753	default_loop = 1;
		754	#endif
		755
		756	loop_init (EV_A_ methods);
		757
468	if (ev_method)	758	if (ev_method (EV_A))
469	{	759	{
470	ev_watcher_init (&sigev, sigcb);	760	ev_watcher_init (&sigev, sigcb);
		761	ev_set_priority (&sigev, EV_MAXPRI);
471	siginit ();	762	siginit (EV_A);
472		763
		764	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	765	ev_signal_init (&childev, childcb, SIGCHLD);
		766	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	767	ev_signal_start (EV_A_ &childev);
		768	ev_unref (EV_A); /* child watcher should not keep loop alive */
		769	#endif
475	}	770	}
		771	else
		772	default_loop = 0;
476	}	773	}
477		774
478	return ev_method;	775	return default_loop;
479	}	776	}
480		777
481	/*****************************************************************************/
482
483	void	778	void
484	ev_prefork (void)	779	ev_default_destroy (void)
485	{	780	{
486	/* nop */	781	#if EV_MULTIPLICITY
487	}	782	struct ev_loop *loop = default_loop;
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif	783	#endif
502		784
		785	ev_ref (EV_A); /* child watcher */
		786	ev_signal_stop (EV_A_ &childev);
		787
		788	ev_ref (EV_A); /* signal watcher */
503	ev_io_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);
504	close (sigpipe [0]);	807	close (sigpipe [0]);
505	close (sigpipe [1]);	808	close (sigpipe [1]);
506	pipe (sigpipe);	809	pipe (sigpipe);
		810
		811	ev_ref (EV_A); /* signal watcher */
507	siginit ();	812	siginit (EV_A);
508	}	813	}
509		814
510	/*****************************************************************************/	815	/*****************************************************************************/
511		816
512	static void	817	static void
513	call_pending (void)	818	call_pending (EV_P)
514	{	819	{
		820	int pri;
		821
		822	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	823	while (pendingcnt [pri])
516	{	824	{
517	ANPENDING *p = pendings + --pendingcnt;	825	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		826
519	if (p->w)	827	if (p->w)
520	{	828	{
521	p->w->pending = 0;	829	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	830	p->w->cb (EV_A_ p->w, p->events);
523	}	831	}
524	}	832	}
525	}	833	}
526		834
527	static void	835	static void
528	timers_reify (void)	836	timers_reify (EV_P)
529	{	837	{
530	while (timercnt && timers [0]->at <= now)	838	while (timercnt && ((WT)timers [0])->at <= mn_now)
531	{	839	{
532	struct ev_timer *w = timers [0];	840	struct ev_timer *w = timers [0];
		841
		842	assert (("inactive timer on timer heap detected", ev_is_active (w)));
533		843
534	/* first reschedule or stop timer */	844	/* first reschedule or stop timer */
535	if (w->repeat)	845	if (w->repeat)
536	{	846	{
		847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
537	w->at = now + w->repeat;	848	((WT)w)->at = mn_now + w->repeat;
538	assert (("timer timeout in the past, negative repeat?", w->at > now));
539	downheap ((WT *)timers, timercnt, 0);	849	downheap ((WT *)timers, timercnt, 0);
540	}	850	}
541	else	851	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		853
544	event ((W)w, EV_TIMEOUT);	854	event (EV_A_ (W)w, EV_TIMEOUT);
545	}	855	}
546	}	856	}
547		857
548	static void	858	static void
549	periodics_reify (void)	859	periodics_reify (EV_P)
550	{	860	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
552	{	862	{
553	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)));
554		866
555	/* first reschedule or stop timer */	867	/* first reschedule or stop timer */
556	if (w->interval)	868	if (w->interval)
557	{	869	{
558	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;
559	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));
560	downheap ((WT *)periodics, periodiccnt, 0);	872	downheap ((WT *)periodics, periodiccnt, 0);
561	}	873	}
562	else	874	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		876
565	event ((W)w, EV_TIMEOUT);	877	event (EV_A_ (W)w, EV_PERIODIC);
566	}	878	}
567	}	879	}
568		880
569	static void	881	static void
570	periodics_reschedule (ev_tstamp diff)	882	periodics_reschedule (EV_P)
571	{	883	{
572	int i;	884	int i;
573		885
574	/* adjust periodics after time jump */	886	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	887	for (i = 0; i < periodiccnt; ++i)
576	{	888	{
577	struct ev_periodic *w = periodics [i];	889	struct ev_periodic *w = periodics [i];
578		890
579	if (w->interval)	891	if (w->interval)
580	{	892	{
581	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;
582		894
583	if (fabs (diff) >= 1e-4)	895	if (fabs (diff) >= 1e-4)
584	{	896	{
585	ev_periodic_stop (w);	897	ev_periodic_stop (EV_A_ w);
586	ev_periodic_start (w);	898	ev_periodic_start (EV_A_ w);
587		899
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	900	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	901	}
590	}	902	}
591	}	903	}
592	}	904	}
593		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
594	static void	924	static void
595	time_update (void)	925	time_update (EV_P)
596	{	926	{
597	int i;	927	int i;
598		928
599	ev_now = ev_time ();	929	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	930	if (expect_true (have_monotonic))
602	{	931	{
603	ev_tstamp odiff = diff;	932	if (time_update_monotonic (EV_A))
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	933	{
607	now = get_clock ();	934	ev_tstamp odiff = rtmn_diff;
		935
		936	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		937	{
608	diff = ev_now - now;	938	rtmn_diff = rt_now - mn_now;
609		939
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	941	return; /* all is well */
612		942
613	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) */
614	}	951	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}	952	}
619	else	953	else
		954	#endif
620	{	955	{
621	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))
622	{	959	{
623	periodics_reschedule (ev_now - now);	960	periodics_reschedule (EV_A);
624		961
625	/* 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 */
626	for (i = 0; i < timercnt; ++i)	963	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	964	((WT)timers [i])->at += rt_now - mn_now;
628	}	965	}
629		966
630	now = ev_now;	967	mn_now = rt_now;
631	}	968	}
632	}	969	}
633		970
634	int ev_loop_done;	971	void
		972	ev_ref (EV_P)
		973	{
		974	++activecnt;
		975	}
635		976
		977	void
		978	ev_unref (EV_P)
		979	{
		980	--activecnt;
		981	}
		982
		983	static int loop_done;
		984
		985	void
636	void ev_loop (int flags)	986	ev_loop (EV_P_ int flags)
637	{	987	{
638	double block;	988	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	989	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640		990
641	do	991	do
642	{	992	{
643	/* queue check watchers (and execute them) */	993	/* queue check watchers (and execute them) */
644	if (preparecnt)	994	if (expect_false (preparecnt))
645	{	995	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	996	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	997	call_pending (EV_A);
648	}	998	}
649		999
650	/* update fd-related kernel structures */	1000	/* update fd-related kernel structures */
651	fd_reify ();	1001	fd_reify (EV_A);
652		1002
653	/* calculate blocking time */	1003	/* calculate blocking time */
654		1004
655	/* 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
656	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	{
657	ev_now = ev_time ();	1013	rt_now = ev_time ();
		1014	mn_now = rt_now;
		1015	}
658		1016
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	1017	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	1018	block = 0.;
661	else	1019	else
662	{	1020	{
663	block = MAX_BLOCKTIME;	1021	block = MAX_BLOCKTIME;
664		1022
665	if (timercnt)	1023	if (timercnt)
666	{	1024	{
667	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;
668	if (block > to) block = to;	1026	if (block > to) block = to;
669	}	1027	}
670		1028
671	if (periodiccnt)	1029	if (periodiccnt)
672	{	1030	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
674	if (block > to) block = to;	1032	if (block > to) block = to;
675	}	1033	}
676		1034
677	if (block < 0.) block = 0.;	1035	if (block < 0.) block = 0.;
678	}	1036	}
679		1037
680	method_poll (block);	1038	method_poll (EV_A_ block);
681		1039
682	/* update ev_now, do magic */	1040	/* update rt_now, do magic */
683	time_update ();	1041	time_update (EV_A);
684		1042
685	/* queue pending timers and reschedule them */	1043	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1044	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	1045	periodics_reify (EV_A); /* absolute timers called first */
688		1046
689	/* queue idle watchers unless io or timers are pending */	1047	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	1048	if (!pendingcnt)
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1049	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1050
693	/* queue check watchers, to be executed first */	1051	/* queue check watchers, to be executed first */
694	if (checkcnt)	1052	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1053	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1054
697	call_pending ();	1055	call_pending (EV_A);
698	}	1056	}
699	while (!ev_loop_done);	1057	while (activecnt && !loop_done);
700		1058
701	if (ev_loop_done != 2)	1059	if (loop_done != 2)
702	ev_loop_done = 0;	1060	loop_done = 0;
		1061	}
		1062
		1063	void
		1064	ev_unloop (EV_P_ int how)
		1065	{
		1066	loop_done = how;
703	}	1067	}
704		1068
705	/*****************************************************************************/	1069	/*****************************************************************************/
706		1070
707	static void	1071	inline void
708	wlist_add (WL *head, WL elem)	1072	wlist_add (WL *head, WL elem)
709	{	1073	{
710	elem->next = *head;	1074	elem->next = *head;
711	*head = elem;	1075	*head = elem;
712	}	1076	}
713		1077
714	static void	1078	inline void
715	wlist_del (WL *head, WL elem)	1079	wlist_del (WL *head, WL elem)
716	{	1080	{
717	while (*head)	1081	while (*head)
718	{	1082	{
719	if (*head == elem)	1083	if (*head == elem)
…		…
724		1088
725	head = &(*head)->next;	1089	head = &(*head)->next;
726	}	1090	}
727	}	1091	}
728		1092
729	static void	1093	inline void
730	ev_clear (W w)	1094	ev_clear_pending (EV_P_ W w)
731	{	1095	{
732	if (w->pending)	1096	if (w->pending)
733	{	1097	{
734	pendings [w->pending - 1].w = 0;	1098	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1099	w->pending = 0;
736	}	1100	}
737	}	1101	}
738		1102
739	static void	1103	inline void
740	ev_start (W w, int active)	1104	ev_start (EV_P_ W w, int active)
741	{	1105	{
		1106	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1107	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1108
742	w->active = active;	1109	w->active = active;
		1110	ev_ref (EV_A);
743	}	1111	}
744		1112
745	static void	1113	inline void
746	ev_stop (W w)	1114	ev_stop (EV_P_ W w)
747	{	1115	{
		1116	ev_unref (EV_A);
748	w->active = 0;	1117	w->active = 0;
749	}	1118	}
750		1119
751	/*****************************************************************************/	1120	/*****************************************************************************/
752		1121
753	void	1122	void
754	ev_io_start (struct ev_io *w)	1123	ev_io_start (EV_P_ struct ev_io *w)
755	{	1124	{
		1125	int fd = w->fd;
		1126
756	if (ev_is_active (w))	1127	if (ev_is_active (w))
757	return;	1128	return;
758		1129
759	int fd = w->fd;	1130	assert (("ev_io_start called with negative fd", fd >= 0));
760		1131
761	ev_start ((W)w, 1);	1132	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1133	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1134	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1135
765	fd_change (fd);	1136	fd_change (EV_A_ fd);
766	}	1137	}
767		1138
768	void	1139	void
769	ev_io_stop (struct ev_io *w)	1140	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1141	{
771	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
773	return;	1144	return;
774		1145
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1146	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
777		1148
778	fd_change (w->fd);	1149	fd_change (EV_A_ w->fd);
779	}	1150	}
780		1151
781	void	1152	void
782	ev_timer_start (struct ev_timer *w)	1153	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1154	{
784	if (ev_is_active (w))	1155	if (ev_is_active (w))
785	return;	1156	return;
786		1157
787	w->at += now;	1158	((WT)w)->at += mn_now;
788		1159
789	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.));
790		1161
791	ev_start ((W)w, ++timercnt);	1162	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1163	array_needsize (timers, timermax, timercnt, );
793	timers [timercnt - 1] = w;	1164	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1165	upheap ((WT *)timers, timercnt - 1);
795	}
796		1166
		1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1168	}
		1169
797	void	1170	void
798	ev_timer_stop (struct ev_timer *w)	1171	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1172	{
800	ev_clear ((W)w);	1173	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1174	if (!ev_is_active (w))
802	return;	1175	return;
803		1176
		1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1178
804	if (w->active < timercnt--)	1179	if (((W)w)->active < timercnt--)
805	{	1180	{
806	timers [w->active - 1] = timers [timercnt];	1181	timers [((W)w)->active - 1] = timers [timercnt];
807	downheap ((WT *)timers, timercnt, w->active - 1);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
808	}	1183	}
809		1184
810	w->at = w->repeat;	1185	((WT)w)->at = w->repeat;
811		1186
812	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
813	}	1188	}
814		1189
815	void	1190	void
816	ev_timer_again (struct ev_timer *w)	1191	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1192	{
818	if (ev_is_active (w))	1193	if (ev_is_active (w))
819	{	1194	{
820	if (w->repeat)	1195	if (w->repeat)
821	{	1196	{
822	w->at = now + w->repeat;	1197	((WT)w)->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
824	}	1199	}
825	else	1200	else
826	ev_timer_stop (w);	1201	ev_timer_stop (EV_A_ w);
827	}	1202	}
828	else if (w->repeat)	1203	else if (w->repeat)
829	ev_timer_start (w);	1204	ev_timer_start (EV_A_ w);
830	}	1205	}
831		1206
832	void	1207	void
833	ev_periodic_start (struct ev_periodic *w)	1208	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1209	{
835	if (ev_is_active (w))	1210	if (ev_is_active (w))
836	return;	1211	return;
837		1212
838	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.));
839		1214
840	/* 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 */
841	if (w->interval)	1216	if (w->interval)
842	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;
843		1218
844	ev_start ((W)w, ++periodiccnt);	1219	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1220	array_needsize (periodics, periodicmax, periodiccnt, );
846	periodics [periodiccnt - 1] = w;	1221	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1222	upheap ((WT *)periodics, periodiccnt - 1);
848	}
849		1223
		1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1225	}
		1226
850	void	1227	void
851	ev_periodic_stop (struct ev_periodic *w)	1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1229	{
853	ev_clear ((W)w);	1230	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1231	if (!ev_is_active (w))
855	return;	1232	return;
856		1233
		1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1235
857	if (w->active < periodiccnt--)	1236	if (((W)w)->active < periodiccnt--)
858	{	1237	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
861	}	1240	}
862		1241
863	ev_stop ((W)w);	1242	ev_stop (EV_A_ (W)w);
864	}	1243	}
865		1244
866	void	1245	void
867	ev_signal_start (struct ev_signal *w)	1246	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1247	{
869	if (ev_is_active (w))	1248	if (ev_is_active (w))
870	return;	1249	return;
871		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
872	ev_start ((W)w, 1);	1326	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1327	array_needsize (signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1329
876	if (!w->next)	1330	if (!((WL)w)->next)
877	{	1331	{
		1332	#if WIN32
		1333	signal (w->signum, sighandler);
		1334	#else
878	struct sigaction sa;	1335	struct sigaction sa;
879	sa.sa_handler = sighandler;	1336	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1337	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1339	sigaction (w->signum, &sa, 0);
		1340	#endif
883	}	1341	}
884	}	1342	}
885		1343
886	void	1344	void
887	ev_signal_stop (struct ev_signal *w)	1345	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1346	{
889	ev_clear ((W)w);	1347	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1348	if (!ev_is_active (w))
891	return;	1349	return;
892		1350
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1351	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1352	ev_stop (EV_A_ (W)w);
895		1353
896	if (!signals [w->signum - 1].head)	1354	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1355	signal (w->signum, SIG_DFL);
898	}	1356	}
899		1357
900	void	1358	void
901	ev_idle_start (struct ev_idle *w)	1359	ev_child_start (EV_P_ struct ev_child *w)
902	{	1360	{
		1361	#if EV_MULTIPLICITY
		1362	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1363	#endif
903	if (ev_is_active (w))	1364	if (ev_is_active (w))
904	return;	1365	return;
905		1366
906	ev_start ((W)w, ++idlecnt);	1367	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1369	}
910		1370
911	void	1371	void
912	ev_idle_stop (struct ev_idle *w)	1372	ev_child_stop (EV_P_ struct ev_child *w)
913	{	1373	{
914	ev_clear ((W)w);	1374	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1375	if (ev_is_active (w))
916	return;	1376	return;
917		1377
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)
968	{
969	if (ev_is_active (w))
970	return;
971
972	ev_start ((W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}
975
976	void
977	ev_child_stop (struct ev_child *w)
978	{
979	ev_clear ((W)w);
980	if (ev_is_active (w))
981	return;
982
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1378	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1379	ev_stop (EV_A_ (W)w);
985	}	1380	}
986		1381
987	/*****************************************************************************/	1382	/*****************************************************************************/
988		1383
989	struct ev_once	1384	struct ev_once
…		…
993	void (*cb)(int revents, void *arg);	1388	void (*cb)(int revents, void *arg);
994	void *arg;	1389	void *arg;
995	};	1390	};
996		1391
997	static void	1392	static void
998	once_cb (struct ev_once *once, int revents)	1393	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1394	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1395	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1396	void *arg = once->arg;
1002		1397
1003	ev_io_stop (&once->io);	1398	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1399	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1400	free (once);
1006		1401
1007	cb (revents, arg);	1402	cb (revents, arg);
1008	}	1403	}
1009		1404
1010	static void	1405	static void
1011	once_cb_io (struct ev_io *w, int revents)	1406	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1407	{
1013	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);
1014	}	1409	}
1015		1410
1016	static void	1411	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1412	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1413	{
1019	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);
1020	}	1415	}
1021		1416
1022	void	1417	void
1023	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)
1024	{	1419	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1420	struct ev_once *once = malloc (sizeof (struct ev_once));
1026		1421
1027	if (!once)	1422	if (!once)
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1423	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1033		1428
1034	ev_watcher_init (&once->io, once_cb_io);	1429	ev_watcher_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1430	if (fd >= 0)
1036	{	1431	{
1037	ev_io_set (&once->io, fd, events);	1432	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1433	ev_io_start (EV_A_ &once->io);
1039	}	1434	}
1040		1435
1041	ev_watcher_init (&once->to, once_cb_to);	1436	ev_watcher_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1437	if (timeout >= 0.)
1043	{	1438	{
1044	ev_timer_set (&once->to, timeout, 0.);	1439	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1440	ev_timer_start (EV_A_ &once->to);
1046	}	1441	}
1047	}	1442	}
1048	}	1443	}
1049		1444
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}
1127
1128	#endif
1129
1130
1131
1132

Diff Legend

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