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

Comparing libev/ev.c (file contents):
Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs.
Revision 1.70 by root, Tue Nov 6 00:52:32 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	static void (syserr_cb)(const char msg);
		159
		160	void ev_set_syserr_cb (void (cb)(const char msg))
		161	{
		162	syserr_cb = cb;
		163	}
		164
		165	static void
		166	syserr (const char *msg)
		167	{
		168	if (!msg)
		169	msg = "(libev) system error";
		170
		171	if (syserr_cb)
		172	syserr_cb (msg);
		173	else
		174	{
		175	perror (msg);
		176	abort ();
		177	}
		178	}
		179
		180	static void (alloc)(void *ptr, long size);
		181
		182	void ev_set_allocator (void (cb)(void *ptr, long size))
		183	{
		184	alloc = cb;
		185	}
		186
		187	static void *
		188	ev_realloc (void *ptr, long size)
		189	{
		190	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		191
		192	if (!ptr && size)
		193	{
		194	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		195	abort ();
		196	}
		197
		198	return ptr;
		199	}
		200
		201	#define ev_malloc(size) ev_realloc (0, (size))
		202	#define ev_free(ptr) ev_realloc ((ptr), 0)
		203
		204	/*****************************************************************************/
		205
		206	typedef struct
		207	{
		208	WL head;
		209	unsigned char events;
		210	unsigned char reify;
		211	} ANFD;
		212
		213	typedef struct
		214	{
		215	W w;
		216	int events;
		217	} ANPENDING;
		218
		219	#if EV_MULTIPLICITY
		220
		221	struct ev_loop
		222	{
		223	# define VAR(name,decl) decl;
		224	# include "ev_vars.h"
		225	};
		226	# undef VAR
		227	# include "ev_wrap.h"
		228
		229	#else
		230
		231	# define VAR(name,decl) static decl;
		232	# include "ev_vars.h"
		233	# undef VAR
		234
		235	#endif
		236
		237	/*****************************************************************************/
		238
		239	inline ev_tstamp
94	ev_time (void)	240	ev_time (void)
95	{	241	{
96	#if EV_USE_REALTIME	242	#if EV_USE_REALTIME
97	struct timespec ts;	243	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	244	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	248	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	249	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	250	#endif
105	}	251	}
106		252
107	static ev_tstamp	253	inline ev_tstamp
108	get_clock (void)	254	get_clock (void)
109	{	255	{
110	#if EV_USE_MONOTONIC	256	#if EV_USE_MONOTONIC
111	if (have_monotonic)	257	if (expect_true (have_monotonic))
112	{	258	{
113	struct timespec ts;	259	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	260	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	261	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	262	}
117	#endif	263	#endif
118		264
119	return ev_time ();	265	return ev_time ();
120	}	266	}
121		267
		268	ev_tstamp
		269	ev_now (EV_P)
		270	{
		271	return rt_now;
		272	}
		273
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	274	#define array_roundsize(base,n) ((n) \| 4 & ~3)
123		275
124	#define array_needsize(base,cur,cnt,init) \	276	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	277	if (expect_false ((cnt) > cur)) \
126	{ \	278	{ \
127	int newcnt = cur; \	279	int newcnt = cur; \
128	do \	280	do \
129	{ \	281	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	282	newcnt = array_roundsize (base, newcnt << 1); \
131	} \	283	} \
132	while ((cnt) > newcnt); \	284	while ((cnt) > newcnt); \
133	\	285	\
134	base = realloc (base, sizeof (base) (newcnt)); \	286	base = ev_realloc (base, sizeof (base) (newcnt)); \
135	init (base + cur, newcnt - cur); \	287	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	288	cur = newcnt; \
137	}	289	}
		290
		291	#define array_slim(stem) \
		292	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		293	{ \
		294	stem ## max = array_roundsize (stem ## cnt >> 1); \
		295	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		296	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		297	}
		298
		299	#define array_free(stem, idx) \
		300	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
138		301
139	/*****************************************************************************/	302	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150		303
151	static void	304	static void
152	anfds_init (ANFD *base, int count)	305	anfds_init (ANFD *base, int count)
153	{	306	{
154	while (count--)	307	while (count--)
…		…
159		312
160	++base;	313	++base;
161	}	314	}
162	}	315	}
163		316
164	typedef struct
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void	317	static void
174	event (W w, int events)	318	event (EV_P_ W w, int events)
175	{	319	{
176	if (w->pending)	320	if (w->pending)
177	{	321	{
178	pendings [w->pending - 1].events \|= events;	322	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
179	return;	323	return;
180	}	324	}
181		325
182	w->pending = ++pendingcnt;	326	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	327	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
184	pendings [pendingcnt - 1].w = w;	328	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	329	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	330	}
187		331
188	static void	332	static void
189	queue_events (W *events, int eventcnt, int type)	333	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	334	{
191	int i;	335	int i;
192		336
193	for (i = 0; i < eventcnt; ++i)	337	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	338	event (EV_A_ events [i], type);
195	}	339	}
196		340
197	static void	341	static void
198	fd_event (int fd, int events)	342	fd_event (EV_P_ int fd, int events)
199	{	343	{
200	ANFD *anfd = anfds + fd;	344	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	345	struct ev_io *w;
202		346
203	for (w = anfd->head; w; w = w->next)	347	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
204	{	348	{
205	int ev = w->events & events;	349	int ev = w->events & events;
206		350
207	if (ev)	351	if (ev)
208	event ((W)w, ev);	352	event (EV_A_ (W)w, ev);
209	}	353	}
210	}	354	}
211		355
212	/*****************************************************************************/	356	/*****************************************************************************/
213		357
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	358	static void
218	fd_reify (void)	359	fd_reify (EV_P)
219	{	360	{
220	int i;	361	int i;
221		362
222	for (i = 0; i < fdchangecnt; ++i)	363	for (i = 0; i < fdchangecnt; ++i)
223	{	364	{
…		…
225	ANFD *anfd = anfds + fd;	366	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	367	struct ev_io *w;
227		368
228	int events = 0;	369	int events = 0;
229		370
230	for (w = anfd->head; w; w = w->next)	371	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
231	events \|= w->events;	372	events \|= w->events;
232		373
233	anfd->reify = 0;	374	anfd->reify = 0;
234		375
235	if (anfd->events != events)
236	{
237	method_modify (fd, anfd->events, events);	376	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	377	anfd->events = events;
239	}
240	}	378	}
241		379
242	fdchangecnt = 0;	380	fdchangecnt = 0;
243	}	381	}
244		382
245	static void	383	static void
246	fd_change (int fd)	384	fd_change (EV_P_ int fd)
247	{	385	{
248	if (anfds [fd].reify \|\| fdchangecnt < 0)	386	if (anfds [fd].reify)
249	return;	387	return;
250		388
251	anfds [fd].reify = 1;	389	anfds [fd].reify = 1;
252		390
253	++fdchangecnt;	391	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	392	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
255	fdchanges [fdchangecnt - 1] = fd;	393	fdchanges [fdchangecnt - 1] = fd;
256	}	394	}
257		395
		396	static void
		397	fd_kill (EV_P_ int fd)
		398	{
		399	struct ev_io *w;
		400
		401	while ((w = (struct ev_io *)anfds [fd].head))
		402	{
		403	ev_io_stop (EV_A_ w);
		404	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		405	}
		406	}
		407
258	/* called on EBADF to verify fds */	408	/* called on EBADF to verify fds */
259	static void	409	static void
260	fd_recheck (void)	410	fd_ebadf (EV_P)
261	{	411	{
262	int fd;	412	int fd;
263		413
264	for (fd = 0; fd < anfdmax; ++fd)	414	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	415	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	416	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
267	while (anfds [fd].head)	417	fd_kill (EV_A_ fd);
		418	}
		419
		420	/* called on ENOMEM in select/poll to kill some fds and retry */
		421	static void
		422	fd_enomem (EV_P)
		423	{
		424	int fd;
		425
		426	for (fd = anfdmax; fd--; )
		427	if (anfds [fd].events)
268	{	428	{
269	ev_io_stop (anfds [fd].head);	429	fd_kill (EV_A_ fd);
270	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	430	return;
271	}	431	}
		432	}
		433
		434	/* usually called after fork if method needs to re-arm all fds from scratch */
		435	static void
		436	fd_rearm_all (EV_P)
		437	{
		438	int fd;
		439
		440	/* this should be highly optimised to not do anything but set a flag */
		441	for (fd = 0; fd < anfdmax; ++fd)
		442	if (anfds [fd].events)
		443	{
		444	anfds [fd].events = 0;
		445	fd_change (EV_A_ fd);
		446	}
272	}	447	}
273		448
274	/*****************************************************************************/	449	/*****************************************************************************/
275		450
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	451	static void
283	upheap (WT *timers, int k)	452	upheap (WT *heap, int k)
284	{	453	{
285	WT w = timers [k];	454	WT w = heap [k];
286		455
287	while (k && timers [k >> 1]->at > w->at)	456	while (k && heap [k >> 1]->at > w->at)
288	{	457	{
289	timers [k] = timers [k >> 1];	458	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	459	((W)heap [k])->active = k + 1;
291	k >>= 1;	460	k >>= 1;
292	}	461	}
293		462
294	timers [k] = w;	463	heap [k] = w;
295	timers [k]->active = k + 1;	464	((W)heap [k])->active = k + 1;
296		465
297	}	466	}
298		467
299	static void	468	static void
300	downheap (WT *timers, int N, int k)	469	downheap (WT *heap, int N, int k)
301	{	470	{
302	WT w = timers [k];	471	WT w = heap [k];
303		472
304	while (k < (N >> 1))	473	while (k < (N >> 1))
305	{	474	{
306	int j = k << 1;	475	int j = k << 1;
307		476
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	477	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	478	++j;
310		479
311	if (w->at <= timers [j]->at)	480	if (w->at <= heap [j]->at)
312	break;	481	break;
313		482
314	timers [k] = timers [j];	483	heap [k] = heap [j];
315	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
316	k = j;	485	k = j;
317	}	486	}
318		487
319	timers [k] = w;	488	heap [k] = w;
320	timers [k]->active = k + 1;	489	((W)heap [k])->active = k + 1;
321	}	490	}
322		491
323	/*****************************************************************************/	492	/*****************************************************************************/
324		493
325	typedef struct	494	typedef struct
326	{	495	{
327	struct ev_signal *head;	496	WL head;
328	sig_atomic_t volatile gotsig;	497	sig_atomic_t volatile gotsig;
329	} ANSIG;	498	} ANSIG;
330		499
331	static ANSIG *signals;	500	static ANSIG *signals;
332	static int signalmax;	501	static int signalmax;
…		…
348	}	517	}
349		518
350	static void	519	static void
351	sighandler (int signum)	520	sighandler (int signum)
352	{	521	{
		522	#if WIN32
		523	signal (signum, sighandler);
		524	#endif
		525
353	signals [signum - 1].gotsig = 1;	526	signals [signum - 1].gotsig = 1;
354		527
355	if (!gotsig)	528	if (!gotsig)
356	{	529	{
		530	int old_errno = errno;
357	gotsig = 1;	531	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	532	write (sigpipe [1], &signum, 1);
		533	errno = old_errno;
359	}	534	}
360	}	535	}
361		536
362	static void	537	static void
363	sigcb (struct ev_io *iow, int revents)	538	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	539	{
365	struct ev_signal *w;	540	WL w;
366	int sig;	541	int signum;
367		542
368	read (sigpipe [0], &revents, 1);	543	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	544	gotsig = 0;
370		545
371	for (sig = signalmax; sig--; )	546	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	547	if (signals [signum].gotsig)
373	{	548	{
374	signals [sig].gotsig = 0;	549	signals [signum].gotsig = 0;
375		550
376	for (w = signals [sig].head; w; w = w->next)	551	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	552	event (EV_A_ (W)w, EV_SIGNAL);
378	}	553	}
379	}	554	}
380		555
381	static void	556	static void
382	siginit (void)	557	siginit (EV_P)
383	{	558	{
		559	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	560	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	561	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		562
387	/* rather than sort out wether we really need nb, set it */	563	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	564	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	565	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		566	#endif
390		567
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	568	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	569	ev_io_start (EV_A_ &sigev);
		570	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	571	}
394		572
395	/*****************************************************************************/	573	/*****************************************************************************/
396		574
397	static struct ev_idle **idles;	575	#ifndef WIN32
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407		576
408	static struct ev_child *childs [PID_HASHSIZE];	577	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;	578	static struct ev_signal childev;
410		579
411	#ifndef WCONTINUED	580	#ifndef WCONTINUED
412	# define WCONTINUED 0	581	# define WCONTINUED 0
413	#endif	582	#endif
414		583
415	static void	584	static void
416	childcb (struct ev_signal *sw, int revents)	585	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	586	{
418	struct ev_child *w;	587	struct ev_child *w;
		588
		589	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		590	if (w->pid == pid \|\| !w->pid)
		591	{
		592	ev_priority (w) = ev_priority (sw); /* need to do it now */
		593	w->rpid = pid;
		594	w->rstatus = status;
		595	event (EV_A_ (W)w, EV_CHILD);
		596	}
		597	}
		598
		599	static void
		600	childcb (EV_P_ struct ev_signal *sw, int revents)
		601	{
419	int pid, status;	602	int pid, status;
420		603
421	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	604	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	605	{
423	if (w->pid == pid \|\| w->pid == -1)	606	/* make sure we are called again until all childs have been reaped */
424	{	607	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	608
426	event ((W)w, EV_CHILD);	609	child_reap (EV_A_ sw, pid, pid, status);
427	}	610	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		611	}
428	}	612	}
		613
		614	#endif
429		615
430	/*****************************************************************************/	616	/*****************************************************************************/
431		617
		618	#if EV_USE_KQUEUE
		619	# include "ev_kqueue.c"
		620	#endif
432	#if EV_USE_EPOLL	621	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	622	# include "ev_epoll.c"
434	#endif	623	#endif
		624	#if EV_USE_POLL
		625	# include "ev_poll.c"
		626	#endif
435	#if EV_USE_SELECT	627	#if EV_USE_SELECT
436	# include "ev_select.c"	628	# include "ev_select.c"
437	#endif	629	#endif
438		630
439	int	631	int
…		…
446	ev_version_minor (void)	638	ev_version_minor (void)
447	{	639	{
448	return EV_VERSION_MINOR;	640	return EV_VERSION_MINOR;
449	}	641	}
450		642
451	int ev_init (int flags)	643	/* return true if we are running with elevated privileges and should ignore env variables */
		644	static int
		645	enable_secure (void)
452	{	646	{
		647	#ifdef WIN32
		648	return 0;
		649	#else
		650	return getuid () != geteuid ()
		651	\|\| getgid () != getegid ();
		652	#endif
		653	}
		654
		655	int
		656	ev_method (EV_P)
		657	{
		658	return method;
		659	}
		660
		661	static void
		662	loop_init (EV_P_ int methods)
		663	{
453	if (!ev_method)	664	if (!method)
454	{	665	{
455	#if EV_USE_MONOTONIC	666	#if EV_USE_MONOTONIC
456	{	667	{
457	struct timespec ts;	668	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	669	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	670	have_monotonic = 1;
460	}	671	}
461	#endif	672	#endif
462		673
463	ev_now = ev_time ();	674	rt_now = ev_time ();
464	now = get_clock ();	675	mn_now = get_clock ();
		676	now_floor = mn_now;
465	diff = ev_now - now;	677	rtmn_diff = rt_now - mn_now;
466		678
467	if (pipe (sigpipe))	679	if (methods == EVMETHOD_AUTO)
468	return 0;	680	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		681	methods = atoi (getenv ("LIBEV_METHODS"));
		682	else
470	ev_method = EVMETHOD_NONE;	683	methods = EVMETHOD_ANY;
		684
		685	method = 0;
		686	#if EV_USE_WIN32
		687	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		688	#endif
		689	#if EV_USE_KQUEUE
		690	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		691	#endif
471	#if EV_USE_EPOLL	692	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	693	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		694	#endif
		695	#if EV_USE_POLL
		696	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
473	#endif	697	#endif
474	#if EV_USE_SELECT	698	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	699	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	700	#endif
477		701
		702	ev_watcher_init (&sigev, sigcb);
		703	ev_set_priority (&sigev, EV_MAXPRI);
		704	}
		705	}
		706
		707	void
		708	loop_destroy (EV_P)
		709	{
		710	int i;
		711
		712	#if EV_USE_WIN32
		713	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		714	#endif
		715	#if EV_USE_KQUEUE
		716	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		717	#endif
		718	#if EV_USE_EPOLL
		719	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		720	#endif
		721	#if EV_USE_POLL
		722	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		723	#endif
		724	#if EV_USE_SELECT
		725	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		726	#endif
		727
		728	for (i = NUMPRI; i--; )
		729	array_free (pending, [i]);
		730
		731	array_free (fdchange, );
		732	array_free (timer, );
		733	array_free (periodic, );
		734	array_free (idle, );
		735	array_free (prepare, );
		736	array_free (check, );
		737
		738	method = 0;
		739	}
		740
		741	static void
		742	loop_fork (EV_P)
		743	{
		744	#if EV_USE_EPOLL
		745	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		746	#endif
		747	#if EV_USE_KQUEUE
		748	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		749	#endif
		750
		751	if (ev_is_active (&sigev))
		752	{
		753	/* default loop */
		754
		755	ev_ref (EV_A);
		756	ev_io_stop (EV_A_ &sigev);
		757	close (sigpipe [0]);
		758	close (sigpipe [1]);
		759
		760	while (pipe (sigpipe))
		761	syserr ("(libev) error creating pipe");
		762
		763	siginit (EV_A);
		764	}
		765
		766	postfork = 0;
		767	}
		768
		769	#if EV_MULTIPLICITY
		770	struct ev_loop *
		771	ev_loop_new (int methods)
		772	{
		773	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		774
		775	memset (loop, 0, sizeof (struct ev_loop));
		776
		777	loop_init (EV_A_ methods);
		778
		779	if (ev_method (EV_A))
		780	return loop;
		781
		782	return 0;
		783	}
		784
		785	void
		786	ev_loop_destroy (EV_P)
		787	{
		788	loop_destroy (EV_A);
		789	ev_free (loop);
		790	}
		791
		792	void
		793	ev_loop_fork (EV_P)
		794	{
		795	postfork = 1;
		796	}
		797
		798	#endif
		799
		800	#if EV_MULTIPLICITY
		801	struct ev_loop default_loop_struct;
		802	static struct ev_loop *default_loop;
		803
		804	struct ev_loop *
		805	#else
		806	static int default_loop;
		807
		808	int
		809	#endif
		810	ev_default_loop (int methods)
		811	{
		812	if (sigpipe [0] == sigpipe [1])
		813	if (pipe (sigpipe))
		814	return 0;
		815
		816	if (!default_loop)
		817	{
		818	#if EV_MULTIPLICITY
		819	struct ev_loop *loop = default_loop = &default_loop_struct;
		820	#else
		821	default_loop = 1;
		822	#endif
		823
		824	loop_init (EV_A_ methods);
		825
478	if (ev_method)	826	if (ev_method (EV_A))
479	{	827	{
480	ev_watcher_init (&sigev, sigcb);
481	siginit ();	828	siginit (EV_A);
482		829
		830	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	831	ev_signal_init (&childev, childcb, SIGCHLD);
		832	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	833	ev_signal_start (EV_A_ &childev);
		834	ev_unref (EV_A); /* child watcher should not keep loop alive */
		835	#endif
485	}	836	}
		837	else
		838	default_loop = 0;
486	}	839	}
487		840
488	return ev_method;	841	return default_loop;
		842	}
		843
		844	void
		845	ev_default_destroy (void)
		846	{
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *loop = default_loop;
		849	#endif
		850
		851	ev_ref (EV_A); /* child watcher */
		852	ev_signal_stop (EV_A_ &childev);
		853
		854	ev_ref (EV_A); /* signal watcher */
		855	ev_io_stop (EV_A_ &sigev);
		856
		857	close (sigpipe [0]); sigpipe [0] = 0;
		858	close (sigpipe [1]); sigpipe [1] = 0;
		859
		860	loop_destroy (EV_A);
		861	}
		862
		863	void
		864	ev_default_fork (void)
		865	{
		866	#if EV_MULTIPLICITY
		867	struct ev_loop *loop = default_loop;
		868	#endif
		869
		870	if (method)
		871	postfork = 1;
489	}	872	}
490		873
491	/*****************************************************************************/	874	/*****************************************************************************/
492		875
493	void
494	ev_prefork (void)
495	{
496	/* nop */
497	}
498
499	void
500	ev_postfork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif
512
513	ev_io_stop (&sigev);
514	close (sigpipe [0]);
515	close (sigpipe [1]);
516	pipe (sigpipe);
517	siginit ();
518	}
519
520	/*****************************************************************************/
521
522	static void	876	static void
523	call_pending (void)	877	call_pending (EV_P)
524	{	878	{
		879	int pri;
		880
		881	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	882	while (pendingcnt [pri])
526	{	883	{
527	ANPENDING *p = pendings + --pendingcnt;	884	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		885
529	if (p->w)	886	if (p->w)
530	{	887	{
531	p->w->pending = 0;	888	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	889	p->w->cb (EV_A_ p->w, p->events);
533	}	890	}
534	}	891	}
535	}	892	}
536		893
537	static void	894	static void
538	timers_reify (void)	895	timers_reify (EV_P)
539	{	896	{
540	while (timercnt && timers [0]->at <= now)	897	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	898	{
542	struct ev_timer *w = timers [0];	899	struct ev_timer *w = timers [0];
		900
		901	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		902
544	/* first reschedule or stop timer */	903	/* first reschedule or stop timer */
545	if (w->repeat)	904	if (w->repeat)
546	{	905	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	906	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	907	((WT)w)->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	908	downheap ((WT *)timers, timercnt, 0);
550	}	909	}
551	else	910	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	911	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		912
554	event ((W)w, EV_TIMEOUT);	913	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	914	}
556	}	915	}
557		916
558	static void	917	static void
559	periodics_reify (void)	918	periodics_reify (EV_P)
560	{	919	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	920	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
562	{	921	{
563	struct ev_periodic *w = periodics [0];	922	struct ev_periodic *w = periodics [0];
		923
		924	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
564		925
565	/* first reschedule or stop timer */	926	/* first reschedule or stop timer */
566	if (w->interval)	927	if (w->interval)
567	{	928	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	929	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	930	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	931	downheap ((WT *)periodics, periodiccnt, 0);
571	}	932	}
572	else	933	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	934	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		935
575	event ((W)w, EV_PERIODIC);	936	event (EV_A_ (W)w, EV_PERIODIC);
576	}	937	}
577	}	938	}
578		939
579	static void	940	static void
580	periodics_reschedule (ev_tstamp diff)	941	periodics_reschedule (EV_P)
581	{	942	{
582	int i;	943	int i;
583		944
584	/* adjust periodics after time jump */	945	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	946	for (i = 0; i < periodiccnt; ++i)
586	{	947	{
587	struct ev_periodic *w = periodics [i];	948	struct ev_periodic *w = periodics [i];
588		949
589	if (w->interval)	950	if (w->interval)
590	{	951	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	952	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
592		953
593	if (fabs (diff) >= 1e-4)	954	if (fabs (diff) >= 1e-4)
594	{	955	{
595	ev_periodic_stop (w);	956	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	957	ev_periodic_start (EV_A_ w);
597		958
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	959	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	960	}
600	}	961	}
601	}	962	}
602	}	963	}
603		964
		965	inline int
		966	time_update_monotonic (EV_P)
		967	{
		968	mn_now = get_clock ();
		969
		970	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		971	{
		972	rt_now = rtmn_diff + mn_now;
		973	return 0;
		974	}
		975	else
		976	{
		977	now_floor = mn_now;
		978	rt_now = ev_time ();
		979	return 1;
		980	}
		981	}
		982
604	static void	983	static void
605	time_update (void)	984	time_update (EV_P)
606	{	985	{
607	int i;	986	int i;
608		987
609	ev_now = ev_time ();	988	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	989	if (expect_true (have_monotonic))
612	{	990	{
613	ev_tstamp odiff = diff;	991	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	992	{
617	now = get_clock ();	993	ev_tstamp odiff = rtmn_diff;
		994
		995	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		996	{
618	diff = ev_now - now;	997	rtmn_diff = rt_now - mn_now;
619		998
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	999	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	1000	return; /* all is well */
622		1001
623	ev_now = ev_time ();	1002	rt_now = ev_time ();
		1003	mn_now = get_clock ();
		1004	now_floor = mn_now;
		1005	}
		1006
		1007	periodics_reschedule (EV_A);
		1008	/* no timer adjustment, as the monotonic clock doesn't jump */
		1009	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
624	}	1010	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	1011	}
629	else	1012	else
		1013	#endif
630	{	1014	{
631	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1015	rt_now = ev_time ();
		1016
		1017	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
632	{	1018	{
633	periodics_reschedule (ev_now - now);	1019	periodics_reschedule (EV_A);
634		1020
635	/* adjust timers. this is easy, as the offset is the same for all */	1021	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	1022	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	1023	((WT)timers [i])->at += rt_now - mn_now;
638	}	1024	}
639		1025
640	now = ev_now;	1026	mn_now = rt_now;
641	}	1027	}
642	}	1028	}
643		1029
644	int ev_loop_done;	1030	void
		1031	ev_ref (EV_P)
		1032	{
		1033	++activecnt;
		1034	}
645		1035
		1036	void
		1037	ev_unref (EV_P)
		1038	{
		1039	--activecnt;
		1040	}
		1041
		1042	static int loop_done;
		1043
		1044	void
646	void ev_loop (int flags)	1045	ev_loop (EV_P_ int flags)
647	{	1046	{
648	double block;	1047	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1048	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
650		1049
651	do	1050	do
652	{	1051	{
653	/* queue check watchers (and execute them) */	1052	/* queue check watchers (and execute them) */
654	if (preparecnt)	1053	if (expect_false (preparecnt))
655	{	1054	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1055	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	1056	call_pending (EV_A);
658	}	1057	}
659		1058
		1059	/* we might have forked, so reify kernel state if necessary */
		1060	if (expect_false (postfork))
		1061	loop_fork (EV_A);
		1062
660	/* update fd-related kernel structures */	1063	/* update fd-related kernel structures */
661	fd_reify ();	1064	fd_reify (EV_A);
662		1065
663	/* calculate blocking time */	1066	/* calculate blocking time */
664		1067
665	/* we only need this for !monotonic clockor timers, but as we basically	1068	/* we only need this for !monotonic clockor timers, but as we basically
666	always have timers, we just calculate it always */	1069	always have timers, we just calculate it always */
		1070	#if EV_USE_MONOTONIC
		1071	if (expect_true (have_monotonic))
		1072	time_update_monotonic (EV_A);
		1073	else
		1074	#endif
		1075	{
667	ev_now = ev_time ();	1076	rt_now = ev_time ();
		1077	mn_now = rt_now;
		1078	}
668		1079
669	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1080	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
670	block = 0.;	1081	block = 0.;
671	else	1082	else
672	{	1083	{
673	block = MAX_BLOCKTIME;	1084	block = MAX_BLOCKTIME;
674		1085
675	if (timercnt)	1086	if (timercnt)
676	{	1087	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1088	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
678	if (block > to) block = to;	1089	if (block > to) block = to;
679	}	1090	}
680		1091
681	if (periodiccnt)	1092	if (periodiccnt)
682	{	1093	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1094	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
684	if (block > to) block = to;	1095	if (block > to) block = to;
685	}	1096	}
686		1097
687	if (block < 0.) block = 0.;	1098	if (block < 0.) block = 0.;
688	}	1099	}
689		1100
690	method_poll (block);	1101	method_poll (EV_A_ block);
691		1102
692	/* update ev_now, do magic */	1103	/* update rt_now, do magic */
693	time_update ();	1104	time_update (EV_A);
694		1105
695	/* queue pending timers and reschedule them */	1106	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1107	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	1108	periodics_reify (EV_A); /* absolute timers called first */
698		1109
699	/* queue idle watchers unless io or timers are pending */	1110	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1111	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1112	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1113
703	/* queue check watchers, to be executed first */	1114	/* queue check watchers, to be executed first */
704	if (checkcnt)	1115	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1116	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1117
707	call_pending ();	1118	call_pending (EV_A);
708	}	1119	}
709	while (!ev_loop_done);	1120	while (activecnt && !loop_done);
710		1121
711	if (ev_loop_done != 2)	1122	if (loop_done != 2)
712	ev_loop_done = 0;	1123	loop_done = 0;
		1124	}
		1125
		1126	void
		1127	ev_unloop (EV_P_ int how)
		1128	{
		1129	loop_done = how;
713	}	1130	}
714		1131
715	/*****************************************************************************/	1132	/*****************************************************************************/
716		1133
717	static void	1134	inline void
718	wlist_add (WL *head, WL elem)	1135	wlist_add (WL *head, WL elem)
719	{	1136	{
720	elem->next = *head;	1137	elem->next = *head;
721	*head = elem;	1138	*head = elem;
722	}	1139	}
723		1140
724	static void	1141	inline void
725	wlist_del (WL *head, WL elem)	1142	wlist_del (WL *head, WL elem)
726	{	1143	{
727	while (*head)	1144	while (*head)
728	{	1145	{
729	if (*head == elem)	1146	if (*head == elem)
…		…
734		1151
735	head = &(*head)->next;	1152	head = &(*head)->next;
736	}	1153	}
737	}	1154	}
738		1155
739	static void	1156	inline void
740	ev_clear_pending (W w)	1157	ev_clear_pending (EV_P_ W w)
741	{	1158	{
742	if (w->pending)	1159	if (w->pending)
743	{	1160	{
744	pendings [w->pending - 1].w = 0;	1161	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1162	w->pending = 0;
746	}	1163	}
747	}	1164	}
748		1165
749	static void	1166	inline void
750	ev_start (W w, int active)	1167	ev_start (EV_P_ W w, int active)
751	{	1168	{
		1169	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1170	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1171
752	w->active = active;	1172	w->active = active;
		1173	ev_ref (EV_A);
753	}	1174	}
754		1175
755	static void	1176	inline void
756	ev_stop (W w)	1177	ev_stop (EV_P_ W w)
757	{	1178	{
		1179	ev_unref (EV_A);
758	w->active = 0;	1180	w->active = 0;
759	}	1181	}
760		1182
761	/*****************************************************************************/	1183	/*****************************************************************************/
762		1184
763	void	1185	void
764	ev_io_start (struct ev_io *w)	1186	ev_io_start (EV_P_ struct ev_io *w)
765	{	1187	{
		1188	int fd = w->fd;
		1189
766	if (ev_is_active (w))	1190	if (ev_is_active (w))
767	return;	1191	return;
768		1192
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1193	assert (("ev_io_start called with negative fd", fd >= 0));
772		1194
773	ev_start ((W)w, 1);	1195	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1196	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1197	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1198
777	fd_change (fd);	1199	fd_change (EV_A_ fd);
778	}	1200	}
779		1201
780	void	1202	void
781	ev_io_stop (struct ev_io *w)	1203	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1204	{
783	ev_clear_pending ((W)w);	1205	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1206	if (!ev_is_active (w))
785	return;	1207	return;
786		1208
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1209	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1210	ev_stop (EV_A_ (W)w);
789		1211
790	fd_change (w->fd);	1212	fd_change (EV_A_ w->fd);
791	}	1213	}
792		1214
793	void	1215	void
794	ev_timer_start (struct ev_timer *w)	1216	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1217	{
796	if (ev_is_active (w))	1218	if (ev_is_active (w))
797	return;	1219	return;
798		1220
799	w->at += now;	1221	((WT)w)->at += mn_now;
800		1222
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1223	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1224
803	ev_start ((W)w, ++timercnt);	1225	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1226	array_needsize (timers, timermax, timercnt, );
805	timers [timercnt - 1] = w;	1227	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1228	upheap ((WT *)timers, timercnt - 1);
807	}
808		1229
		1230	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1231	}
		1232
809	void	1233	void
810	ev_timer_stop (struct ev_timer *w)	1234	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1235	{
812	ev_clear_pending ((W)w);	1236	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1237	if (!ev_is_active (w))
814	return;	1238	return;
815		1239
		1240	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1241
816	if (w->active < timercnt--)	1242	if (((W)w)->active < timercnt--)
817	{	1243	{
818	timers [w->active - 1] = timers [timercnt];	1244	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1246	}
821		1247
822	w->at = w->repeat;	1248	((WT)w)->at = w->repeat;
823		1249
824	ev_stop ((W)w);	1250	ev_stop (EV_A_ (W)w);
825	}	1251	}
826		1252
827	void	1253	void
828	ev_timer_again (struct ev_timer *w)	1254	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1255	{
830	if (ev_is_active (w))	1256	if (ev_is_active (w))
831	{	1257	{
832	if (w->repeat)	1258	if (w->repeat)
833	{	1259	{
834	w->at = now + w->repeat;	1260	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1261	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
836	}	1262	}
837	else	1263	else
838	ev_timer_stop (w);	1264	ev_timer_stop (EV_A_ w);
839	}	1265	}
840	else if (w->repeat)	1266	else if (w->repeat)
841	ev_timer_start (w);	1267	ev_timer_start (EV_A_ w);
842	}	1268	}
843		1269
844	void	1270	void
845	ev_periodic_start (struct ev_periodic *w)	1271	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1272	{
847	if (ev_is_active (w))	1273	if (ev_is_active (w))
848	return;	1274	return;
849		1275
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1276	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1277
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1278	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)	1279	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1280	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
855		1281
856	ev_start ((W)w, ++periodiccnt);	1282	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1283	array_needsize (periodics, periodicmax, periodiccnt, );
858	periodics [periodiccnt - 1] = w;	1284	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1285	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1286
		1287	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1288	}
		1289
862	void	1290	void
863	ev_periodic_stop (struct ev_periodic *w)	1291	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1292	{
865	ev_clear_pending ((W)w);	1293	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1294	if (!ev_is_active (w))
867	return;	1295	return;
868		1296
		1297	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1298
869	if (w->active < periodiccnt--)	1299	if (((W)w)->active < periodiccnt--)
870	{	1300	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1301	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1302	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1303	}
874		1304
875	ev_stop ((W)w);	1305	ev_stop (EV_A_ (W)w);
876	}	1306	}
877		1307
878	void	1308	void
879	ev_signal_start (struct ev_signal *w)	1309	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1310	{
881	if (ev_is_active (w))	1311	if (ev_is_active (w))
882	return;	1312	return;
883		1313
		1314	ev_start (EV_A_ (W)w, ++idlecnt);
		1315	array_needsize (idles, idlemax, idlecnt, );
		1316	idles [idlecnt - 1] = w;
		1317	}
		1318
		1319	void
		1320	ev_idle_stop (EV_P_ struct ev_idle *w)
		1321	{
		1322	ev_clear_pending (EV_A_ (W)w);
		1323	if (ev_is_active (w))
		1324	return;
		1325
		1326	idles [((W)w)->active - 1] = idles [--idlecnt];
		1327	ev_stop (EV_A_ (W)w);
		1328	}
		1329
		1330	void
		1331	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1332	{
		1333	if (ev_is_active (w))
		1334	return;
		1335
		1336	ev_start (EV_A_ (W)w, ++preparecnt);
		1337	array_needsize (prepares, preparemax, preparecnt, );
		1338	prepares [preparecnt - 1] = w;
		1339	}
		1340
		1341	void
		1342	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1343	{
		1344	ev_clear_pending (EV_A_ (W)w);
		1345	if (ev_is_active (w))
		1346	return;
		1347
		1348	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1349	ev_stop (EV_A_ (W)w);
		1350	}
		1351
		1352	void
		1353	ev_check_start (EV_P_ struct ev_check *w)
		1354	{
		1355	if (ev_is_active (w))
		1356	return;
		1357
		1358	ev_start (EV_A_ (W)w, ++checkcnt);
		1359	array_needsize (checks, checkmax, checkcnt, );
		1360	checks [checkcnt - 1] = w;
		1361	}
		1362
		1363	void
		1364	ev_check_stop (EV_P_ struct ev_check *w)
		1365	{
		1366	ev_clear_pending (EV_A_ (W)w);
		1367	if (ev_is_active (w))
		1368	return;
		1369
		1370	checks [((W)w)->active - 1] = checks [--checkcnt];
		1371	ev_stop (EV_A_ (W)w);
		1372	}
		1373
		1374	#ifndef SA_RESTART
		1375	# define SA_RESTART 0
		1376	#endif
		1377
		1378	void
		1379	ev_signal_start (EV_P_ struct ev_signal *w)
		1380	{
		1381	#if EV_MULTIPLICITY
		1382	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1383	#endif
		1384	if (ev_is_active (w))
		1385	return;
		1386
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1387	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1388
886	ev_start ((W)w, 1);	1389	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1390	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1391	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1392
890	if (!w->next)	1393	if (!((WL)w)->next)
891	{	1394	{
		1395	#if WIN32
		1396	signal (w->signum, sighandler);
		1397	#else
892	struct sigaction sa;	1398	struct sigaction sa;
893	sa.sa_handler = sighandler;	1399	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1400	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1401	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1402	sigaction (w->signum, &sa, 0);
		1403	#endif
897	}	1404	}
898	}	1405	}
899		1406
900	void	1407	void
901	ev_signal_stop (struct ev_signal *w)	1408	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1409	{
903	ev_clear_pending ((W)w);	1410	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1411	if (!ev_is_active (w))
905	return;	1412	return;
906		1413
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1414	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1415	ev_stop (EV_A_ (W)w);
909		1416
910	if (!signals [w->signum - 1].head)	1417	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1418	signal (w->signum, SIG_DFL);
912	}	1419	}
913		1420
914	void	1421	void
915	ev_idle_start (struct ev_idle *w)	1422	ev_child_start (EV_P_ struct ev_child *w)
916	{	1423	{
		1424	#if EV_MULTIPLICITY
		1425	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1426	#endif
917	if (ev_is_active (w))	1427	if (ev_is_active (w))
918	return;	1428	return;
919		1429
920	ev_start ((W)w, ++idlecnt);	1430	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1431	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1432	}
924		1433
925	void	1434	void
926	ev_idle_stop (struct ev_idle *w)	1435	ev_child_stop (EV_P_ struct ev_child *w)
927	{	1436	{
928	ev_clear_pending ((W)w);	1437	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1438	if (ev_is_active (w))
930	return;	1439	return;
931		1440
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)
982	{
983	if (ev_is_active (w))
984	return;
985
986	ev_start ((W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}
989
990	void
991	ev_child_stop (struct ev_child *w)
992	{
993	ev_clear_pending ((W)w);
994	if (ev_is_active (w))
995	return;
996
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1441	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1442	ev_stop (EV_A_ (W)w);
999	}	1443	}
1000		1444
1001	/*****************************************************************************/	1445	/*****************************************************************************/
1002		1446
1003	struct ev_once	1447	struct ev_once
…		…
1007	void (cb)(int revents, void arg);	1451	void (cb)(int revents, void arg);
1008	void *arg;	1452	void *arg;
1009	};	1453	};
1010		1454
1011	static void	1455	static void
1012	once_cb (struct ev_once *once, int revents)	1456	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1457	{
1014	void (cb)(int revents, void arg) = once->cb;	1458	void (cb)(int revents, void arg) = once->cb;
1015	void *arg = once->arg;	1459	void *arg = once->arg;
1016		1460
1017	ev_io_stop (&once->io);	1461	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1462	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1463	ev_free (once);
1020		1464
1021	cb (revents, arg);	1465	cb (revents, arg);
1022	}	1466	}
1023		1467
1024	static void	1468	static void
1025	once_cb_io (struct ev_io *w, int revents)	1469	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1470	{
1027	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1471	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1028	}	1472	}
1029		1473
1030	static void	1474	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1475	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1476	{
1033	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1477	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1034	}	1478	}
1035		1479
1036	void	1480	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1481	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1038	{	1482	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1483	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1040		1484
1041	if (!once)	1485	if (!once)
1042	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1486	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1043	else	1487	else
1044	{	1488	{
…		…
1047		1491
1048	ev_watcher_init (&once->io, once_cb_io);	1492	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1493	if (fd >= 0)
1050	{	1494	{
1051	ev_io_set (&once->io, fd, events);	1495	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1496	ev_io_start (EV_A_ &once->io);
1053	}	1497	}
1054		1498
1055	ev_watcher_init (&once->to, once_cb_to);	1499	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1500	if (timeout >= 0.)
1057	{	1501	{
1058	ev_timer_set (&once->to, timeout, 0.);	1502	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1503	ev_timer_start (EV_A_ &once->to);
1060	}	1504	}
1061	}	1505	}
1062	}	1506	}
1063		1507
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}
1141
1142	#endif
1143
1144
1145
1146

Diff Legend

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

Comparing libev/ev.c (file contents): Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs. Revision 1.70 by root, Tue Nov 6 00:52:32 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs.
Revision 1.70 by root, Tue Nov 6 00:52:32 2007 UTC