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

Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.69 by root, Tue Nov 6 00:10:04 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
63	#ifndef EV_USE_REALTIME	105	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
65	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
66		122
67	#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) */
68	#define MAX_BLOCKTIME 59.731	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
70		127
71	#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)
72		143
73	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
76		147
77	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80		149
81	static int have_monotonic; /* runtime */	150	#if WIN32
82		151	/* note: the comment below could not be substantiated, but what would I care */
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
84	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
85	static void (*method_poll)(ev_tstamp timeout);	154	#endif
86		155
87	/*****************************************************************************/	156	/*****************************************************************************/
88		157
89	ev_tstamp	158	static void (*syserr_cb)(void);
		159
		160	void ev_set_syserr_cb (void (*cb)(void))
		161	{
		162	syserr_cb = cb;
		163	}
		164
		165	static void
		166	syserr (void)
		167	{
		168	if (syserr_cb)
		169	syserr_cb ();
		170	else
		171	{
		172	perror ("libev");
		173	abort ();
		174	}
		175	}
		176
		177	static void (alloc)(void *ptr, long size);
		178
		179	void ev_set_allocator (void (cb)(void *ptr, long size))
		180	{
		181	alloc = cb;
		182	}
		183
		184	static void *
		185	ev_realloc (void *ptr, long size)
		186	{
		187	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		188
		189	if (!ptr && size)
		190	{
		191	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		192	abort ();
		193	}
		194
		195	return ptr;
		196	}
		197
		198	#define ev_malloc(size) ev_realloc (0, (size))
		199	#define ev_free(ptr) ev_realloc ((ptr), 0)
		200
		201	/*****************************************************************************/
		202
		203	typedef struct
		204	{
		205	WL head;
		206	unsigned char events;
		207	unsigned char reify;
		208	} ANFD;
		209
		210	typedef struct
		211	{
		212	W w;
		213	int events;
		214	} ANPENDING;
		215
		216	#if EV_MULTIPLICITY
		217
		218	struct ev_loop
		219	{
		220	# define VAR(name,decl) decl;
		221	# include "ev_vars.h"
		222	};
		223	# undef VAR
		224	# include "ev_wrap.h"
		225
		226	#else
		227
		228	# define VAR(name,decl) static decl;
		229	# include "ev_vars.h"
		230	# undef VAR
		231
		232	#endif
		233
		234	/*****************************************************************************/
		235
		236	inline ev_tstamp
90	ev_time (void)	237	ev_time (void)
91	{	238	{
92	#if EV_USE_REALTIME	239	#if EV_USE_REALTIME
93	struct timespec ts;	240	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	241	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	245	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	246	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	247	#endif
101	}	248	}
102		249
103	static ev_tstamp	250	inline ev_tstamp
104	get_clock (void)	251	get_clock (void)
105	{	252	{
106	#if EV_USE_MONOTONIC	253	#if EV_USE_MONOTONIC
107	if (have_monotonic)	254	if (expect_true (have_monotonic))
108	{	255	{
109	struct timespec ts;	256	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	257	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	258	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	259	}
113	#endif	260	#endif
114		261
115	return ev_time ();	262	return ev_time ();
116	}	263	}
117		264
		265	ev_tstamp
		266	ev_now (EV_P)
		267	{
		268	return rt_now;
		269	}
		270
118	#define array_roundsize(base,n) ((n) \| 4 & ~3)	271	#define array_roundsize(base,n) ((n) \| 4 & ~3)
119		272
120	#define array_needsize(base,cur,cnt,init) \	273	#define array_needsize(base,cur,cnt,init) \
121	if ((cnt) > cur) \	274	if (expect_false ((cnt) > cur)) \
122	{ \	275	{ \
123	int newcnt = cur; \	276	int newcnt = cur; \
124	do \	277	do \
125	{ \	278	{ \
126	newcnt = array_roundsize (base, newcnt << 1); \	279	newcnt = array_roundsize (base, newcnt << 1); \
127	} \	280	} \
128	while ((cnt) > newcnt); \	281	while ((cnt) > newcnt); \
129	\	282	\
130	base = realloc (base, sizeof (base) (newcnt)); \	283	base = ev_realloc (base, sizeof (base) (newcnt)); \
131	init (base + cur, newcnt - cur); \	284	init (base + cur, newcnt - cur); \
132	cur = newcnt; \	285	cur = newcnt; \
133	}	286	}
		287
		288	#define array_slim(stem) \
		289	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		290	{ \
		291	stem ## max = array_roundsize (stem ## cnt >> 1); \
		292	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		293	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		294	}
		295
		296	#define array_free(stem, idx) \
		297	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
134		298
135	/*****************************************************************************/	299	/*****************************************************************************/
136
137	typedef struct
138	{
139	struct ev_io *head;
140	int events;
141	} ANFD;
142
143	static ANFD *anfds;
144	static int anfdmax;
145		300
146	static void	301	static void
147	anfds_init (ANFD *base, int count)	302	anfds_init (ANFD *base, int count)
148	{	303	{
149	while (count--)	304	while (count--)
150	{	305	{
151	base->head = 0;	306	base->head = 0;
152	base->events = EV_NONE;	307	base->events = EV_NONE;
		308	base->reify = 0;
		309
153	++base;	310	++base;
154	}	311	}
155	}	312	}
156		313
157	typedef struct
158	{
159	W w;
160	int events;
161	} ANPENDING;
162
163	static ANPENDING *pendings;
164	static int pendingmax, pendingcnt;
165
166	static void	314	static void
167	event (W w, int events)	315	event (EV_P_ W w, int events)
168	{	316	{
		317	if (w->pending)
		318	{
		319	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		320	return;
		321	}
		322
169	w->pending = ++pendingcnt;	323	w->pending = ++pendingcnt [ABSPRI (w)];
170	array_needsize (pendings, pendingmax, pendingcnt, );	324	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
171	pendings [pendingcnt - 1].w = w;	325	pendings [ABSPRI (w)][w->pending - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	326	pendings [ABSPRI (w)][w->pending - 1].events = events;
173	}	327	}
174		328
175	static void	329	static void
176	queue_events (W *events, int eventcnt, int type)	330	queue_events (EV_P_ W *events, int eventcnt, int type)
177	{	331	{
178	int i;	332	int i;
179		333
180	for (i = 0; i < eventcnt; ++i)	334	for (i = 0; i < eventcnt; ++i)
181	event (events [i], type);	335	event (EV_A_ events [i], type);
182	}	336	}
183		337
184	static void	338	static void
185	fd_event (int fd, int events)	339	fd_event (EV_P_ int fd, int events)
186	{	340	{
187	ANFD *anfd = anfds + fd;	341	ANFD *anfd = anfds + fd;
188	struct ev_io *w;	342	struct ev_io *w;
189		343
190	for (w = anfd->head; w; w = w->next)	344	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
191	{	345	{
192	int ev = w->events & events;	346	int ev = w->events & events;
193		347
194	if (ev)	348	if (ev)
195	event ((W)w, ev);	349	event (EV_A_ (W)w, ev);
196	}	350	}
197	}	351	}
198		352
199	/*****************************************************************************/	353	/*****************************************************************************/
200		354
201	static int *fdchanges;
202	static int fdchangemax, fdchangecnt;
203
204	static void	355	static void
205	fd_reify (void)	356	fd_reify (EV_P)
206	{	357	{
207	int i;	358	int i;
208		359
209	for (i = 0; i < fdchangecnt; ++i)	360	for (i = 0; i < fdchangecnt; ++i)
210	{	361	{
…		…
212	ANFD *anfd = anfds + fd;	363	ANFD *anfd = anfds + fd;
213	struct ev_io *w;	364	struct ev_io *w;
214		365
215	int events = 0;	366	int events = 0;
216		367
217	for (w = anfd->head; w; w = w->next)	368	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
218	events \|= w->events;	369	events \|= w->events;
219		370
220	anfd->events &= ~EV_REIFY;	371	anfd->reify = 0;
221		372
222	if (anfd->events != events)
223	{
224	method_modify (fd, anfd->events, events);	373	method_modify (EV_A_ fd, anfd->events, events);
225	anfd->events = events;	374	anfd->events = events;
226	}
227	}	375	}
228		376
229	fdchangecnt = 0;	377	fdchangecnt = 0;
230	}	378	}
231		379
232	static void	380	static void
233	fd_change (int fd)	381	fd_change (EV_P_ int fd)
234	{	382	{
235	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	383	if (anfds [fd].reify \|\| fdchangecnt < 0)
236	return;	384	return;
237		385
238	anfds [fd].events \|= EV_REIFY;	386	anfds [fd].reify = 1;
239		387
240	++fdchangecnt;	388	++fdchangecnt;
241	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
242	fdchanges [fdchangecnt - 1] = fd;	390	fdchanges [fdchangecnt - 1] = fd;
243	}	391	}
244		392
		393	static void
		394	fd_kill (EV_P_ int fd)
		395	{
		396	struct ev_io *w;
		397
		398	while ((w = (struct ev_io *)anfds [fd].head))
		399	{
		400	ev_io_stop (EV_A_ w);
		401	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		402	}
		403	}
		404
245	/* called on EBADF to verify fds */	405	/* called on EBADF to verify fds */
246	static void	406	static void
247	fd_recheck (void)	407	fd_ebadf (EV_P)
248	{	408	{
249	int fd;	409	int fd;
250		410
251	for (fd = 0; fd < anfdmax; ++fd)	411	for (fd = 0; fd < anfdmax; ++fd)
252	if (anfds [fd].events)	412	if (anfds [fd].events)
253	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	413	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
254	while (anfds [fd].head)	414	fd_kill (EV_A_ fd);
		415	}
		416
		417	/* called on ENOMEM in select/poll to kill some fds and retry */
		418	static void
		419	fd_enomem (EV_P)
		420	{
		421	int fd;
		422
		423	for (fd = anfdmax; fd--; )
		424	if (anfds [fd].events)
255	{	425	{
256	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	426	fd_kill (EV_A_ fd);
257	ev_io_stop (anfds [fd].head);	427	return;
258	}	428	}
		429	}
		430
		431	/* susually called after fork if method needs to re-arm all fds from scratch */
		432	static void
		433	fd_rearm_all (EV_P)
		434	{
		435	int fd;
		436
		437	/* this should be highly optimised to not do anything but set a flag */
		438	for (fd = 0; fd < anfdmax; ++fd)
		439	if (anfds [fd].events)
		440	{
		441	anfds [fd].events = 0;
		442	fd_change (EV_A_ fd);
		443	}
259	}	444	}
260		445
261	/*****************************************************************************/	446	/*****************************************************************************/
262		447
263	static struct ev_timer **timers;
264	static int timermax, timercnt;
265
266	static struct ev_periodic **periodics;
267	static int periodicmax, periodiccnt;
268
269	static void	448	static void
270	upheap (WT *timers, int k)	449	upheap (WT *heap, int k)
271	{	450	{
272	WT w = timers [k];	451	WT w = heap [k];
273		452
274	while (k && timers [k >> 1]->at > w->at)	453	while (k && heap [k >> 1]->at > w->at)
275	{	454	{
276	timers [k] = timers [k >> 1];	455	heap [k] = heap [k >> 1];
277	timers [k]->active = k + 1;	456	((W)heap [k])->active = k + 1;
278	k >>= 1;	457	k >>= 1;
279	}	458	}
280		459
281	timers [k] = w;	460	heap [k] = w;
282	timers [k]->active = k + 1;	461	((W)heap [k])->active = k + 1;
283		462
284	}	463	}
285		464
286	static void	465	static void
287	downheap (WT *timers, int N, int k)	466	downheap (WT *heap, int N, int k)
288	{	467	{
289	WT w = timers [k];	468	WT w = heap [k];
290		469
291	while (k < (N >> 1))	470	while (k < (N >> 1))
292	{	471	{
293	int j = k << 1;	472	int j = k << 1;
294		473
295	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	474	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296	++j;	475	++j;
297		476
298	if (w->at <= timers [j]->at)	477	if (w->at <= heap [j]->at)
299	break;	478	break;
300		479
301	timers [k] = timers [j];	480	heap [k] = heap [j];
302	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
303	k = j;	482	k = j;
304	}	483	}
305		484
306	timers [k] = w;	485	heap [k] = w;
307	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
308	}	487	}
309		488
310	/*****************************************************************************/	489	/*****************************************************************************/
311		490
312	typedef struct	491	typedef struct
313	{	492	{
314	struct ev_signal *head;	493	WL head;
315	sig_atomic_t gotsig;	494	sig_atomic_t volatile gotsig;
316	} ANSIG;	495	} ANSIG;
317		496
318	static ANSIG *signals;	497	static ANSIG *signals;
319	static int signalmax;	498	static int signalmax;
320		499
321	static int sigpipe [2];	500	static int sigpipe [2];
322	static sig_atomic_t gotsig;	501	static sig_atomic_t volatile gotsig;
323	static struct ev_io sigev;	502	static struct ev_io sigev;
324		503
325	static void	504	static void
326	signals_init (ANSIG *base, int count)	505	signals_init (ANSIG *base, int count)
327	{	506	{
328	while (count--)	507	while (count--)
329	{	508	{
330	base->head = 0;	509	base->head = 0;
331	base->gotsig = 0;	510	base->gotsig = 0;
		511
332	++base;	512	++base;
333	}	513	}
334	}	514	}
335		515
336	static void	516	static void
337	sighandler (int signum)	517	sighandler (int signum)
338	{	518	{
		519	#if WIN32
		520	signal (signum, sighandler);
		521	#endif
		522
339	signals [signum - 1].gotsig = 1;	523	signals [signum - 1].gotsig = 1;
340		524
341	if (!gotsig)	525	if (!gotsig)
342	{	526	{
		527	int old_errno = errno;
343	gotsig = 1;	528	gotsig = 1;
344	write (sigpipe [1], &gotsig, 1);	529	write (sigpipe [1], &signum, 1);
		530	errno = old_errno;
345	}	531	}
346	}	532	}
347		533
348	static void	534	static void
349	sigcb (struct ev_io *iow, int revents)	535	sigcb (EV_P_ struct ev_io *iow, int revents)
350	{	536	{
351	struct ev_signal *w;	537	WL w;
352	int sig;	538	int signum;
353		539
		540	read (sigpipe [0], &revents, 1);
354	gotsig = 0;	541	gotsig = 0;
355	read (sigpipe [0], &revents, 1);
356		542
357	for (sig = signalmax; sig--; )	543	for (signum = signalmax; signum--; )
358	if (signals [sig].gotsig)	544	if (signals [signum].gotsig)
359	{	545	{
360	signals [sig].gotsig = 0;	546	signals [signum].gotsig = 0;
361		547
362	for (w = signals [sig].head; w; w = w->next)	548	for (w = signals [signum].head; w; w = w->next)
363	event ((W)w, EV_SIGNAL);	549	event (EV_A_ (W)w, EV_SIGNAL);
364	}	550	}
365	}	551	}
366		552
367	static void	553	static void
368	siginit (void)	554	siginit (EV_P)
369	{	555	{
		556	#ifndef WIN32
370	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	557	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
371	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	558	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372		559
373	/* rather than sort out wether we really need nb, set it */	560	/* rather than sort out wether we really need nb, set it */
374	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	561	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
375	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	562	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		563	#endif
376		564
377	ev_io_set (&sigev, sigpipe [0], EV_READ);	565	ev_io_set (&sigev, sigpipe [0], EV_READ);
378	ev_io_start (&sigev);	566	ev_io_start (EV_A_ &sigev);
		567	ev_unref (EV_A); /* child watcher should not keep loop alive */
379	}	568	}
380		569
381	/*****************************************************************************/	570	/*****************************************************************************/
382		571
383	static struct ev_idle **idles;	572	#ifndef WIN32
384	static int idlemax, idlecnt;
385
386	static struct ev_prepare **prepares;
387	static int preparemax, preparecnt;
388
389	static struct ev_check **checks;
390	static int checkmax, checkcnt;
391
392	/*****************************************************************************/
393		573
394	static struct ev_child *childs [PID_HASHSIZE];	574	static struct ev_child *childs [PID_HASHSIZE];
395	static struct ev_signal childev;	575	static struct ev_signal childev;
396		576
397	#ifndef WCONTINUED	577	#ifndef WCONTINUED
398	# define WCONTINUED 0	578	# define WCONTINUED 0
399	#endif	579	#endif
400		580
401	static void	581	static void
402	childcb (struct ev_signal *sw, int revents)	582	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403	{	583	{
404	struct ev_child *w;	584	struct ev_child *w;
		585
		586	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		587	if (w->pid == pid \|\| !w->pid)
		588	{
		589	ev_priority (w) = ev_priority (sw); /* need to do it now */
		590	w->rpid = pid;
		591	w->rstatus = status;
		592	event (EV_A_ (W)w, EV_CHILD);
		593	}
		594	}
		595
		596	static void
		597	childcb (EV_P_ struct ev_signal *sw, int revents)
		598	{
405	int pid, status;	599	int pid, status;
406		600
407	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	601	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
408	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	602	{
409	if (w->pid == pid \|\| w->pid == -1)	603	/* make sure we are called again until all childs have been reaped */
410	{	604	event (EV_A_ (W)sw, EV_SIGNAL);
411	w->status = status;	605
412	event ((W)w, EV_CHILD);	606	child_reap (EV_A_ sw, pid, pid, status);
413	}	607	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		608	}
414	}	609	}
		610
		611	#endif
415		612
416	/*****************************************************************************/	613	/*****************************************************************************/
417		614
		615	#if EV_USE_KQUEUE
		616	# include "ev_kqueue.c"
		617	#endif
418	#if EV_USE_EPOLL	618	#if EV_USE_EPOLL
419	# include "ev_epoll.c"	619	# include "ev_epoll.c"
420	#endif	620	#endif
		621	#if EV_USE_POLL
		622	# include "ev_poll.c"
		623	#endif
421	#if EV_USE_SELECT	624	#if EV_USE_SELECT
422	# include "ev_select.c"	625	# include "ev_select.c"
423	#endif	626	#endif
424		627
425	int	628	int
…		…
432	ev_version_minor (void)	635	ev_version_minor (void)
433	{	636	{
434	return EV_VERSION_MINOR;	637	return EV_VERSION_MINOR;
435	}	638	}
436		639
437	int ev_init (int flags)	640	/* return true if we are running with elevated privileges and should ignore env variables */
		641	static int
		642	enable_secure (void)
438	{	643	{
		644	#ifdef WIN32
		645	return 0;
		646	#else
		647	return getuid () != geteuid ()
		648	\|\| getgid () != getegid ();
		649	#endif
		650	}
		651
		652	int
		653	ev_method (EV_P)
		654	{
		655	return method;
		656	}
		657
		658	static void
		659	loop_init (EV_P_ int methods)
		660	{
439	if (!ev_method)	661	if (!method)
440	{	662	{
441	#if EV_USE_MONOTONIC	663	#if EV_USE_MONOTONIC
442	{	664	{
443	struct timespec ts;	665	struct timespec ts;
444	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	666	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445	have_monotonic = 1;	667	have_monotonic = 1;
446	}	668	}
447	#endif	669	#endif
448		670
449	ev_now = ev_time ();	671	rt_now = ev_time ();
450	now = get_clock ();	672	mn_now = get_clock ();
		673	now_floor = mn_now;
451	diff = ev_now - now;	674	rtmn_diff = rt_now - mn_now;
452		675
453	if (pipe (sigpipe))	676	if (methods == EVMETHOD_AUTO)
454	return 0;	677	if (!enable_secure () && getenv ("LIBEV_METHODS"))
455		678	methods = atoi (getenv ("LIBEV_METHODS"));
		679	else
456	ev_method = EVMETHOD_NONE;	680	methods = EVMETHOD_ANY;
		681
		682	method = 0;
		683	#if EV_USE_WIN32
		684	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		685	#endif
		686	#if EV_USE_KQUEUE
		687	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		688	#endif
457	#if EV_USE_EPOLL	689	#if EV_USE_EPOLL
458	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	690	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		691	#endif
		692	#if EV_USE_POLL
		693	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
459	#endif	694	#endif
460	#if EV_USE_SELECT	695	#if EV_USE_SELECT
461	if (ev_method == EVMETHOD_NONE) select_init (flags);	696	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
462	#endif	697	#endif
		698	}
		699	}
463		700
		701	void
		702	loop_destroy (EV_P)
		703	{
		704	int i;
		705
		706	#if EV_USE_WIN32
		707	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		708	#endif
		709	#if EV_USE_KQUEUE
		710	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		711	#endif
		712	#if EV_USE_EPOLL
		713	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		714	#endif
		715	#if EV_USE_POLL
		716	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		717	#endif
		718	#if EV_USE_SELECT
		719	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		720	#endif
		721
		722	for (i = NUMPRI; i--; )
		723	array_free (pending, [i]);
		724
		725	array_free (fdchange, );
		726	array_free (timer, );
		727	array_free (periodic, );
		728	array_free (idle, );
		729	array_free (prepare, );
		730	array_free (check, );
		731
		732	method = 0;
		733	/TODO/
		734	}
		735
		736	void
		737	loop_fork (EV_P)
		738	{
		739	/TODO/
		740	#if EV_USE_EPOLL
		741	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		742	#endif
		743	#if EV_USE_KQUEUE
		744	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		745	#endif
		746	}
		747
		748	#if EV_MULTIPLICITY
		749	struct ev_loop *
		750	ev_loop_new (int methods)
		751	{
		752	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		753
		754	memset (loop, 0, sizeof (struct ev_loop));
		755
		756	loop_init (EV_A_ methods);
		757
		758	if (ev_method (EV_A))
		759	return loop;
		760
		761	return 0;
		762	}
		763
		764	void
		765	ev_loop_destroy (EV_P)
		766	{
		767	loop_destroy (EV_A);
		768	ev_free (loop);
		769	}
		770
		771	void
		772	ev_loop_fork (EV_P)
		773	{
		774	loop_fork (EV_A);
		775	}
		776
		777	#endif
		778
		779	#if EV_MULTIPLICITY
		780	struct ev_loop default_loop_struct;
		781	static struct ev_loop *default_loop;
		782
		783	struct ev_loop *
		784	#else
		785	static int default_loop;
		786
		787	int
		788	#endif
		789	ev_default_loop (int methods)
		790	{
		791	if (sigpipe [0] == sigpipe [1])
		792	if (pipe (sigpipe))
		793	return 0;
		794
		795	if (!default_loop)
		796	{
		797	#if EV_MULTIPLICITY
		798	struct ev_loop *loop = default_loop = &default_loop_struct;
		799	#else
		800	default_loop = 1;
		801	#endif
		802
		803	loop_init (EV_A_ methods);
		804
464	if (ev_method)	805	if (ev_method (EV_A))
465	{	806	{
466	ev_watcher_init (&sigev, sigcb);	807	ev_watcher_init (&sigev, sigcb);
		808	ev_set_priority (&sigev, EV_MAXPRI);
467	siginit ();	809	siginit (EV_A);
468		810
		811	#ifndef WIN32
469	ev_signal_init (&childev, childcb, SIGCHLD);	812	ev_signal_init (&childev, childcb, SIGCHLD);
		813	ev_set_priority (&childev, EV_MAXPRI);
470	ev_signal_start (&childev);	814	ev_signal_start (EV_A_ &childev);
		815	ev_unref (EV_A); /* child watcher should not keep loop alive */
		816	#endif
471	}	817	}
		818	else
		819	default_loop = 0;
472	}	820	}
473		821
474	return ev_method;	822	return default_loop;
475	}	823	}
476		824
477	/*****************************************************************************/
478
479	void	825	void
480	ev_prefork (void)	826	ev_default_destroy (void)
481	{	827	{
482	/* nop */	828	#if EV_MULTIPLICITY
483	}	829	struct ev_loop *loop = default_loop;
484
485	void
486	ev_postfork_parent (void)
487	{
488	/* nop */
489	}
490
491	void
492	ev_postfork_child (void)
493	{
494	#if EV_USE_EPOLL
495	if (ev_method == EVMETHOD_EPOLL)
496	epoll_postfork_child ();
497	#endif	830	#endif
498		831
		832	ev_ref (EV_A); /* child watcher */
		833	ev_signal_stop (EV_A_ &childev);
		834
		835	ev_ref (EV_A); /* signal watcher */
499	ev_io_stop (&sigev);	836	ev_io_stop (EV_A_ &sigev);
		837
		838	close (sigpipe [0]); sigpipe [0] = 0;
		839	close (sigpipe [1]); sigpipe [1] = 0;
		840
		841	loop_destroy (EV_A);
		842	}
		843
		844	void
		845	ev_default_fork (void)
		846	{
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *loop = default_loop;
		849	#endif
		850
		851	loop_fork (EV_A);
		852
		853	ev_io_stop (EV_A_ &sigev);
500	close (sigpipe [0]);	854	close (sigpipe [0]);
501	close (sigpipe [1]);	855	close (sigpipe [1]);
502	pipe (sigpipe);	856	pipe (sigpipe);
		857
		858	ev_ref (EV_A); /* signal watcher */
503	siginit ();	859	siginit (EV_A);
504	}	860	}
505		861
506	/*****************************************************************************/	862	/*****************************************************************************/
507		863
508	static void	864	static void
509	call_pending (void)	865	call_pending (EV_P)
510	{	866	{
		867	int pri;
		868
		869	for (pri = NUMPRI; pri--; )
511	while (pendingcnt)	870	while (pendingcnt [pri])
512	{	871	{
513	ANPENDING *p = pendings + --pendingcnt;	872	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514		873
515	if (p->w)	874	if (p->w)
516	{	875	{
517	p->w->pending = 0;	876	p->w->pending = 0;
518	p->w->cb (p->w, p->events);	877	p->w->cb (EV_A_ p->w, p->events);
519	}	878	}
520	}	879	}
521	}	880	}
522		881
523	static void	882	static void
524	timers_reify (void)	883	timers_reify (EV_P)
525	{	884	{
526	while (timercnt && timers [0]->at <= now)	885	while (timercnt && ((WT)timers [0])->at <= mn_now)
527	{	886	{
528	struct ev_timer *w = timers [0];	887	struct ev_timer *w = timers [0];
		888
		889	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		890
530	/* first reschedule or stop timer */	891	/* first reschedule or stop timer */
531	if (w->repeat)	892	if (w->repeat)
532	{	893	{
		894	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	895	((WT)w)->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	896	downheap ((WT *)timers, timercnt, 0);
536	}	897	}
537	else	898	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	899	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539		900
540	event ((W)w, EV_TIMEOUT);	901	event (EV_A_ (W)w, EV_TIMEOUT);
541	}	902	}
542	}	903	}
543		904
544	static void	905	static void
545	periodics_reify (void)	906	periodics_reify (EV_P)
546	{	907	{
547	while (periodiccnt && periodics [0]->at <= ev_now)	908	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
548	{	909	{
549	struct ev_periodic *w = periodics [0];	910	struct ev_periodic *w = periodics [0];
		911
		912	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
550		913
551	/* first reschedule or stop timer */	914	/* first reschedule or stop timer */
552	if (w->interval)	915	if (w->interval)
553	{	916	{
554	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	917	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
555	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	918	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
556	downheap ((WT *)periodics, periodiccnt, 0);	919	downheap ((WT *)periodics, periodiccnt, 0);
557	}	920	}
558	else	921	else
559	ev_periodic_stop (w); /* nonrepeating: stop timer */	922	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560		923
561	event ((W)w, EV_TIMEOUT);	924	event (EV_A_ (W)w, EV_PERIODIC);
562	}	925	}
563	}	926	}
564		927
565	static void	928	static void
566	periodics_reschedule (ev_tstamp diff)	929	periodics_reschedule (EV_P)
567	{	930	{
568	int i;	931	int i;
569		932
570	/* adjust periodics after time jump */	933	/* adjust periodics after time jump */
571	for (i = 0; i < periodiccnt; ++i)	934	for (i = 0; i < periodiccnt; ++i)
572	{	935	{
573	struct ev_periodic *w = periodics [i];	936	struct ev_periodic *w = periodics [i];
574		937
575	if (w->interval)	938	if (w->interval)
576	{	939	{
577	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	940	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
578		941
579	if (fabs (diff) >= 1e-4)	942	if (fabs (diff) >= 1e-4)
580	{	943	{
581	ev_periodic_stop (w);	944	ev_periodic_stop (EV_A_ w);
582	ev_periodic_start (w);	945	ev_periodic_start (EV_A_ w);
583		946
584	i = 0; /* restart loop, inefficient, but time jumps should be rare */	947	i = 0; /* restart loop, inefficient, but time jumps should be rare */
585	}	948	}
586	}	949	}
587	}	950	}
588	}	951	}
589		952
		953	inline int
		954	time_update_monotonic (EV_P)
		955	{
		956	mn_now = get_clock ();
		957
		958	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		959	{
		960	rt_now = rtmn_diff + mn_now;
		961	return 0;
		962	}
		963	else
		964	{
		965	now_floor = mn_now;
		966	rt_now = ev_time ();
		967	return 1;
		968	}
		969	}
		970
590	static void	971	static void
591	time_update (void)	972	time_update (EV_P)
592	{	973	{
593	int i;	974	int i;
594		975
595	ev_now = ev_time ();	976	#if EV_USE_MONOTONIC
596
597	if (have_monotonic)	977	if (expect_true (have_monotonic))
598	{	978	{
599	ev_tstamp odiff = diff;	979	if (time_update_monotonic (EV_A))
600
601	for (i = 4; --i; ) /* loop a few times, before making important decisions */
602	{	980	{
603	now = get_clock ();	981	ev_tstamp odiff = rtmn_diff;
		982
		983	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		984	{
604	diff = ev_now - now;	985	rtmn_diff = rt_now - mn_now;
605		986
606	if (fabs (odiff - diff) < MIN_TIMEJUMP)	987	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
607	return; /* all is well */	988	return; /* all is well */
608		989
609	ev_now = ev_time ();	990	rt_now = ev_time ();
		991	mn_now = get_clock ();
		992	now_floor = mn_now;
		993	}
		994
		995	periodics_reschedule (EV_A);
		996	/* no timer adjustment, as the monotonic clock doesn't jump */
		997	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
610	}	998	}
611
612	periodics_reschedule (diff - odiff);
613	/* no timer adjustment, as the monotonic clock doesn't jump */
614	}	999	}
615	else	1000	else
		1001	#endif
616	{	1002	{
617	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1003	rt_now = ev_time ();
		1004
		1005	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
618	{	1006	{
619	periodics_reschedule (ev_now - now);	1007	periodics_reschedule (EV_A);
620		1008
621	/* adjust timers. this is easy, as the offset is the same for all */	1009	/* adjust timers. this is easy, as the offset is the same for all */
622	for (i = 0; i < timercnt; ++i)	1010	for (i = 0; i < timercnt; ++i)
623	timers [i]->at += diff;	1011	((WT)timers [i])->at += rt_now - mn_now;
624	}	1012	}
625		1013
626	now = ev_now;	1014	mn_now = rt_now;
627	}	1015	}
628	}	1016	}
629		1017
630	int ev_loop_done;	1018	void
		1019	ev_ref (EV_P)
		1020	{
		1021	++activecnt;
		1022	}
631		1023
		1024	void
		1025	ev_unref (EV_P)
		1026	{
		1027	--activecnt;
		1028	}
		1029
		1030	static int loop_done;
		1031
		1032	void
632	void ev_loop (int flags)	1033	ev_loop (EV_P_ int flags)
633	{	1034	{
634	double block;	1035	double block;
635	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1036	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
636		1037
637	do	1038	do
638	{	1039	{
639	/* queue check watchers (and execute them) */	1040	/* queue check watchers (and execute them) */
640	if (preparecnt)	1041	if (expect_false (preparecnt))
641	{	1042	{
642	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1043	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643	call_pending ();	1044	call_pending (EV_A);
644	}	1045	}
645		1046
646	/* update fd-related kernel structures */	1047	/* update fd-related kernel structures */
647	fd_reify ();	1048	fd_reify (EV_A);
648		1049
649	/* calculate blocking time */	1050	/* calculate blocking time */
650		1051
651	/* we only need this for !monotonic clockor timers, but as we basically	1052	/* we only need this for !monotonic clockor timers, but as we basically
652	always have timers, we just calculate it always */	1053	always have timers, we just calculate it always */
		1054	#if EV_USE_MONOTONIC
		1055	if (expect_true (have_monotonic))
		1056	time_update_monotonic (EV_A);
		1057	else
		1058	#endif
		1059	{
653	ev_now = ev_time ();	1060	rt_now = ev_time ();
		1061	mn_now = rt_now;
		1062	}
654		1063
655	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1064	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
656	block = 0.;	1065	block = 0.;
657	else	1066	else
658	{	1067	{
659	block = MAX_BLOCKTIME;	1068	block = MAX_BLOCKTIME;
660		1069
661	if (timercnt)	1070	if (timercnt)
662	{	1071	{
663	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1072	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
664	if (block > to) block = to;	1073	if (block > to) block = to;
665	}	1074	}
666		1075
667	if (periodiccnt)	1076	if (periodiccnt)
668	{	1077	{
669	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1078	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
670	if (block > to) block = to;	1079	if (block > to) block = to;
671	}	1080	}
672		1081
673	if (block < 0.) block = 0.;	1082	if (block < 0.) block = 0.;
674	}	1083	}
675		1084
676	method_poll (block);	1085	method_poll (EV_A_ block);
677		1086
678	/* update ev_now, do magic */	1087	/* update rt_now, do magic */
679	time_update ();	1088	time_update (EV_A);
680		1089
681	/* queue pending timers and reschedule them */	1090	/* queue pending timers and reschedule them */
682	timers_reify (); /* relative timers called last */	1091	timers_reify (EV_A); /* relative timers called last */
683	periodics_reify (); /* absolute timers called first */	1092	periodics_reify (EV_A); /* absolute timers called first */
684		1093
685	/* queue idle watchers unless io or timers are pending */	1094	/* queue idle watchers unless io or timers are pending */
686	if (!pendingcnt)	1095	if (!pendingcnt)
687	queue_events ((W *)idles, idlecnt, EV_IDLE);	1096	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688		1097
689	/* queue check watchers, to be executed first */	1098	/* queue check watchers, to be executed first */
690	if (checkcnt)	1099	if (checkcnt)
691	queue_events ((W *)checks, checkcnt, EV_CHECK);	1100	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692		1101
693	call_pending ();	1102	call_pending (EV_A);
694	}	1103	}
695	while (!ev_loop_done);	1104	while (activecnt && !loop_done);
696		1105
697	if (ev_loop_done != 2)	1106	if (loop_done != 2)
698	ev_loop_done = 0;	1107	loop_done = 0;
		1108	}
		1109
		1110	void
		1111	ev_unloop (EV_P_ int how)
		1112	{
		1113	loop_done = how;
699	}	1114	}
700		1115
701	/*****************************************************************************/	1116	/*****************************************************************************/
702		1117
703	static void	1118	inline void
704	wlist_add (WL *head, WL elem)	1119	wlist_add (WL *head, WL elem)
705	{	1120	{
706	elem->next = *head;	1121	elem->next = *head;
707	*head = elem;	1122	*head = elem;
708	}	1123	}
709		1124
710	static void	1125	inline void
711	wlist_del (WL *head, WL elem)	1126	wlist_del (WL *head, WL elem)
712	{	1127	{
713	while (*head)	1128	while (*head)
714	{	1129	{
715	if (*head == elem)	1130	if (*head == elem)
…		…
720		1135
721	head = &(*head)->next;	1136	head = &(*head)->next;
722	}	1137	}
723	}	1138	}
724		1139
725	static void	1140	inline void
726	ev_clear (W w)	1141	ev_clear_pending (EV_P_ W w)
727	{	1142	{
728	if (w->pending)	1143	if (w->pending)
729	{	1144	{
730	pendings [w->pending - 1].w = 0;	1145	pendings [ABSPRI (w)][w->pending - 1].w = 0;
731	w->pending = 0;	1146	w->pending = 0;
732	}	1147	}
733	}	1148	}
734		1149
735	static void	1150	inline void
736	ev_start (W w, int active)	1151	ev_start (EV_P_ W w, int active)
737	{	1152	{
		1153	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1154	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1155
738	w->active = active;	1156	w->active = active;
		1157	ev_ref (EV_A);
739	}	1158	}
740		1159
741	static void	1160	inline void
742	ev_stop (W w)	1161	ev_stop (EV_P_ W w)
743	{	1162	{
		1163	ev_unref (EV_A);
744	w->active = 0;	1164	w->active = 0;
745	}	1165	}
746		1166
747	/*****************************************************************************/	1167	/*****************************************************************************/
748		1168
749	void	1169	void
750	ev_io_start (struct ev_io *w)	1170	ev_io_start (EV_P_ struct ev_io *w)
751	{	1171	{
		1172	int fd = w->fd;
		1173
752	if (ev_is_active (w))	1174	if (ev_is_active (w))
753	return;	1175	return;
754		1176
755	int fd = w->fd;	1177	assert (("ev_io_start called with negative fd", fd >= 0));
756		1178
757	ev_start ((W)w, 1);	1179	ev_start (EV_A_ (W)w, 1);
758	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1180	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
759	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1181	wlist_add ((WL *)&anfds[fd].head, (WL)w);
760		1182
761	fd_change (fd);	1183	fd_change (EV_A_ fd);
762	}	1184	}
763		1185
764	void	1186	void
765	ev_io_stop (struct ev_io *w)	1187	ev_io_stop (EV_P_ struct ev_io *w)
766	{	1188	{
767	ev_clear ((W)w);	1189	ev_clear_pending (EV_A_ (W)w);
768	if (!ev_is_active (w))	1190	if (!ev_is_active (w))
769	return;	1191	return;
770		1192
771	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1193	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772	ev_stop ((W)w);	1194	ev_stop (EV_A_ (W)w);
773		1195
774	fd_change (w->fd);	1196	fd_change (EV_A_ w->fd);
775	}	1197	}
776		1198
777	void	1199	void
778	ev_timer_start (struct ev_timer *w)	1200	ev_timer_start (EV_P_ struct ev_timer *w)
779	{	1201	{
780	if (ev_is_active (w))	1202	if (ev_is_active (w))
781	return;	1203	return;
782		1204
783	w->at += now;	1205	((WT)w)->at += mn_now;
784		1206
785	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1207	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
786		1208
787	ev_start ((W)w, ++timercnt);	1209	ev_start (EV_A_ (W)w, ++timercnt);
788	array_needsize (timers, timermax, timercnt, );	1210	array_needsize (timers, timermax, timercnt, );
789	timers [timercnt - 1] = w;	1211	timers [timercnt - 1] = w;
790	upheap ((WT *)timers, timercnt - 1);	1212	upheap ((WT *)timers, timercnt - 1);
791	}
792		1213
		1214	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1215	}
		1216
793	void	1217	void
794	ev_timer_stop (struct ev_timer *w)	1218	ev_timer_stop (EV_P_ struct ev_timer *w)
795	{	1219	{
796	ev_clear ((W)w);	1220	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1221	if (!ev_is_active (w))
798	return;	1222	return;
799		1223
		1224	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1225
800	if (w->active < timercnt--)	1226	if (((W)w)->active < timercnt--)
801	{	1227	{
802	timers [w->active - 1] = timers [timercnt];	1228	timers [((W)w)->active - 1] = timers [timercnt];
803	downheap ((WT *)timers, timercnt, w->active - 1);	1229	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
804	}	1230	}
805		1231
806	w->at = w->repeat;	1232	((WT)w)->at = w->repeat;
807		1233
808	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
809	}	1235	}
810		1236
811	void	1237	void
812	ev_timer_again (struct ev_timer *w)	1238	ev_timer_again (EV_P_ struct ev_timer *w)
813	{	1239	{
814	if (ev_is_active (w))	1240	if (ev_is_active (w))
815	{	1241	{
816	if (w->repeat)	1242	if (w->repeat)
817	{	1243	{
818	w->at = now + w->repeat;	1244	((WT)w)->at = mn_now + w->repeat;
819	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1246	}
821	else	1247	else
822	ev_timer_stop (w);	1248	ev_timer_stop (EV_A_ w);
823	}	1249	}
824	else if (w->repeat)	1250	else if (w->repeat)
825	ev_timer_start (w);	1251	ev_timer_start (EV_A_ w);
826	}	1252	}
827		1253
828	void	1254	void
829	ev_periodic_start (struct ev_periodic *w)	1255	ev_periodic_start (EV_P_ struct ev_periodic *w)
830	{	1256	{
831	if (ev_is_active (w))	1257	if (ev_is_active (w))
832	return;	1258	return;
833		1259
834	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1260	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
835		1261
836	/* this formula differs from the one in periodic_reify because we do not always round up */	1262	/* this formula differs from the one in periodic_reify because we do not always round up */
837	if (w->interval)	1263	if (w->interval)
838	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1264	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
839		1265
840	ev_start ((W)w, ++periodiccnt);	1266	ev_start (EV_A_ (W)w, ++periodiccnt);
841	array_needsize (periodics, periodicmax, periodiccnt, );	1267	array_needsize (periodics, periodicmax, periodiccnt, );
842	periodics [periodiccnt - 1] = w;	1268	periodics [periodiccnt - 1] = w;
843	upheap ((WT *)periodics, periodiccnt - 1);	1269	upheap ((WT *)periodics, periodiccnt - 1);
844	}
845		1270
		1271	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1272	}
		1273
846	void	1274	void
847	ev_periodic_stop (struct ev_periodic *w)	1275	ev_periodic_stop (EV_P_ struct ev_periodic *w)
848	{	1276	{
849	ev_clear ((W)w);	1277	ev_clear_pending (EV_A_ (W)w);
850	if (!ev_is_active (w))	1278	if (!ev_is_active (w))
851	return;	1279	return;
852		1280
		1281	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1282
853	if (w->active < periodiccnt--)	1283	if (((W)w)->active < periodiccnt--)
854	{	1284	{
855	periodics [w->active - 1] = periodics [periodiccnt];	1285	periodics [((W)w)->active - 1] = periodics [periodiccnt];
856	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1286	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
857	}	1287	}
858		1288
859	ev_stop ((W)w);	1289	ev_stop (EV_A_ (W)w);
860	}	1290	}
861		1291
862	void	1292	void
863	ev_signal_start (struct ev_signal *w)	1293	ev_idle_start (EV_P_ struct ev_idle *w)
864	{	1294	{
865	if (ev_is_active (w))	1295	if (ev_is_active (w))
866	return;	1296	return;
867		1297
		1298	ev_start (EV_A_ (W)w, ++idlecnt);
		1299	array_needsize (idles, idlemax, idlecnt, );
		1300	idles [idlecnt - 1] = w;
		1301	}
		1302
		1303	void
		1304	ev_idle_stop (EV_P_ struct ev_idle *w)
		1305	{
		1306	ev_clear_pending (EV_A_ (W)w);
		1307	if (ev_is_active (w))
		1308	return;
		1309
		1310	idles [((W)w)->active - 1] = idles [--idlecnt];
		1311	ev_stop (EV_A_ (W)w);
		1312	}
		1313
		1314	void
		1315	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1316	{
		1317	if (ev_is_active (w))
		1318	return;
		1319
		1320	ev_start (EV_A_ (W)w, ++preparecnt);
		1321	array_needsize (prepares, preparemax, preparecnt, );
		1322	prepares [preparecnt - 1] = w;
		1323	}
		1324
		1325	void
		1326	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1327	{
		1328	ev_clear_pending (EV_A_ (W)w);
		1329	if (ev_is_active (w))
		1330	return;
		1331
		1332	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1333	ev_stop (EV_A_ (W)w);
		1334	}
		1335
		1336	void
		1337	ev_check_start (EV_P_ struct ev_check *w)
		1338	{
		1339	if (ev_is_active (w))
		1340	return;
		1341
		1342	ev_start (EV_A_ (W)w, ++checkcnt);
		1343	array_needsize (checks, checkmax, checkcnt, );
		1344	checks [checkcnt - 1] = w;
		1345	}
		1346
		1347	void
		1348	ev_check_stop (EV_P_ struct ev_check *w)
		1349	{
		1350	ev_clear_pending (EV_A_ (W)w);
		1351	if (ev_is_active (w))
		1352	return;
		1353
		1354	checks [((W)w)->active - 1] = checks [--checkcnt];
		1355	ev_stop (EV_A_ (W)w);
		1356	}
		1357
		1358	#ifndef SA_RESTART
		1359	# define SA_RESTART 0
		1360	#endif
		1361
		1362	void
		1363	ev_signal_start (EV_P_ struct ev_signal *w)
		1364	{
		1365	#if EV_MULTIPLICITY
		1366	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1367	#endif
		1368	if (ev_is_active (w))
		1369	return;
		1370
		1371	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1372
868	ev_start ((W)w, 1);	1373	ev_start (EV_A_ (W)w, 1);
869	array_needsize (signals, signalmax, w->signum, signals_init);	1374	array_needsize (signals, signalmax, w->signum, signals_init);
870	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1375	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871		1376
872	if (!w->next)	1377	if (!((WL)w)->next)
873	{	1378	{
		1379	#if WIN32
		1380	signal (w->signum, sighandler);
		1381	#else
874	struct sigaction sa;	1382	struct sigaction sa;
875	sa.sa_handler = sighandler;	1383	sa.sa_handler = sighandler;
876	sigfillset (&sa.sa_mask);	1384	sigfillset (&sa.sa_mask);
877	sa.sa_flags = 0;	1385	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878	sigaction (w->signum, &sa, 0);	1386	sigaction (w->signum, &sa, 0);
		1387	#endif
879	}	1388	}
880	}	1389	}
881		1390
882	void	1391	void
883	ev_signal_stop (struct ev_signal *w)	1392	ev_signal_stop (EV_P_ struct ev_signal *w)
884	{	1393	{
885	ev_clear ((W)w);	1394	ev_clear_pending (EV_A_ (W)w);
886	if (!ev_is_active (w))	1395	if (!ev_is_active (w))
887	return;	1396	return;
888		1397
889	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1398	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890	ev_stop ((W)w);	1399	ev_stop (EV_A_ (W)w);
891		1400
892	if (!signals [w->signum - 1].head)	1401	if (!signals [w->signum - 1].head)
893	signal (w->signum, SIG_DFL);	1402	signal (w->signum, SIG_DFL);
894	}	1403	}
895		1404
896	void	1405	void
897	ev_idle_start (struct ev_idle *w)	1406	ev_child_start (EV_P_ struct ev_child *w)
898	{	1407	{
		1408	#if EV_MULTIPLICITY
		1409	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1410	#endif
899	if (ev_is_active (w))	1411	if (ev_is_active (w))
900	return;	1412	return;
901		1413
902	ev_start ((W)w, ++idlecnt);	1414	ev_start (EV_A_ (W)w, 1);
903	array_needsize (idles, idlemax, idlecnt, );	1415	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
904	idles [idlecnt - 1] = w;
905	}	1416	}
906		1417
907	void	1418	void
908	ev_idle_stop (struct ev_idle *w)	1419	ev_child_stop (EV_P_ struct ev_child *w)
909	{	1420	{
910	ev_clear ((W)w);	1421	ev_clear_pending (EV_A_ (W)w);
911	if (ev_is_active (w))	1422	if (ev_is_active (w))
912	return;	1423	return;
913		1424
914	idles [w->active - 1] = idles [--idlecnt];
915	ev_stop ((W)w);
916	}
917
918	void
919	ev_prepare_start (struct ev_prepare *w)
920	{
921	if (ev_is_active (w))
922	return;
923
924	ev_start ((W)w, ++preparecnt);
925	array_needsize (prepares, preparemax, preparecnt, );
926	prepares [preparecnt - 1] = w;
927	}
928
929	void
930	ev_prepare_stop (struct ev_prepare *w)
931	{
932	ev_clear ((W)w);
933	if (ev_is_active (w))
934	return;
935
936	prepares [w->active - 1] = prepares [--preparecnt];
937	ev_stop ((W)w);
938	}
939
940	void
941	ev_check_start (struct ev_check *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, ++checkcnt);
947	array_needsize (checks, checkmax, checkcnt, );
948	checks [checkcnt - 1] = w;
949	}
950
951	void
952	ev_check_stop (struct ev_check *w)
953	{
954	ev_clear ((W)w);
955	if (ev_is_active (w))
956	return;
957
958	checks [w->active - 1] = checks [--checkcnt];
959	ev_stop ((W)w);
960	}
961
962	void
963	ev_child_start (struct ev_child *w)
964	{
965	if (ev_is_active (w))
966	return;
967
968	ev_start ((W)w, 1);
969	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	}
971
972	void
973	ev_child_stop (struct ev_child *w)
974	{
975	ev_clear ((W)w);
976	if (ev_is_active (w))
977	return;
978
979	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1425	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	ev_stop ((W)w);	1426	ev_stop (EV_A_ (W)w);
981	}	1427	}
982		1428
983	/*****************************************************************************/	1429	/*****************************************************************************/
984		1430
985	struct ev_once	1431	struct ev_once
…		…
989	void (cb)(int revents, void arg);	1435	void (cb)(int revents, void arg);
990	void *arg;	1436	void *arg;
991	};	1437	};
992		1438
993	static void	1439	static void
994	once_cb (struct ev_once *once, int revents)	1440	once_cb (EV_P_ struct ev_once *once, int revents)
995	{	1441	{
996	void (cb)(int revents, void arg) = once->cb;	1442	void (cb)(int revents, void arg) = once->cb;
997	void *arg = once->arg;	1443	void *arg = once->arg;
998		1444
999	ev_io_stop (&once->io);	1445	ev_io_stop (EV_A_ &once->io);
1000	ev_timer_stop (&once->to);	1446	ev_timer_stop (EV_A_ &once->to);
1001	free (once);	1447	ev_free (once);
1002		1448
1003	cb (revents, arg);	1449	cb (revents, arg);
1004	}	1450	}
1005		1451
1006	static void	1452	static void
1007	once_cb_io (struct ev_io *w, int revents)	1453	once_cb_io (EV_P_ struct ev_io *w, int revents)
1008	{	1454	{
1009	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1455	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1010	}	1456	}
1011		1457
1012	static void	1458	static void
1013	once_cb_to (struct ev_timer *w, int revents)	1459	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014	{	1460	{
1015	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1461	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1016	}	1462	}
1017		1463
1018	void	1464	void
1019	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1465	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1020	{	1466	{
1021	struct ev_once *once = malloc (sizeof (struct ev_once));	1467	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1022		1468
1023	if (!once)	1469	if (!once)
1024	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1470	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1025	else	1471	else
1026	{	1472	{
…		…
1029		1475
1030	ev_watcher_init (&once->io, once_cb_io);	1476	ev_watcher_init (&once->io, once_cb_io);
1031	if (fd >= 0)	1477	if (fd >= 0)
1032	{	1478	{
1033	ev_io_set (&once->io, fd, events);	1479	ev_io_set (&once->io, fd, events);
1034	ev_io_start (&once->io);	1480	ev_io_start (EV_A_ &once->io);
1035	}	1481	}
1036		1482
1037	ev_watcher_init (&once->to, once_cb_to);	1483	ev_watcher_init (&once->to, once_cb_to);
1038	if (timeout >= 0.)	1484	if (timeout >= 0.)
1039	{	1485	{
1040	ev_timer_set (&once->to, timeout, 0.);	1486	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1487	ev_timer_start (EV_A_ &once->to);
1042	}	1488	}
1043	}	1489	}
1044	}	1490	}
1045		1491
1046	/*****************************************************************************/
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif
1102
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
1128

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Comparing libev/ev.c (file contents): Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs. Revision 1.69 by root, Tue Nov 6 00:10:04 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.69 by root, Tue Nov 6 00:10:04 2007 UTC