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Comparing libev/ev.c (file contents):
Revision 1.26 by root, Wed Oct 31 21:50:15 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	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
49	# endif	102	# endif
50	#endif	103	#endif
51		104
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
63		122
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		127
68	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		143
70	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
73		147
74	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77		149
78	static int have_monotonic; /* runtime */	150	#if WIN32
79		151	/* note: the comment below could not be substantiated, but what would I care */
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
81	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
82	static void (*method_poll)(ev_tstamp timeout);	154	#endif
83		155
84	/*****************************************************************************/	156	/*****************************************************************************/
85		157
86	ev_tstamp	158	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
87	ev_time (void)	237	ev_time (void)
88	{	238	{
89	#if HAVE_REALTIME	239	#if EV_USE_REALTIME
90	struct timespec ts;	240	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	241	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	242	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	243	#else
94	struct timeval tv;	244	struct timeval tv;
95	gettimeofday (&tv, 0);	245	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	246	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	247	#endif
98	}	248	}
99		249
100	static ev_tstamp	250	inline ev_tstamp
101	get_clock (void)	251	get_clock (void)
102	{	252	{
103	#if HAVE_MONOTONIC	253	#if EV_USE_MONOTONIC
104	if (have_monotonic)	254	if (expect_true (have_monotonic))
105	{	255	{
106	struct timespec ts;	256	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	257	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	258	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	259	}
110	#endif	260	#endif
111		261
112	return ev_time ();	262	return ev_time ();
113	}	263	}
114		264
		265	ev_tstamp
		266	ev_now (EV_P)
		267	{
		268	return rt_now;
		269	}
		270
		271	#define array_roundsize(base,n) ((n) | 4 & ~3)
		272
115	#define array_needsize(base,cur,cnt,init) \	273	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	274	if (expect_false ((cnt) > cur)) \
117	{ \	275	{ \
118	int newcnt = cur; \	276	int newcnt = cur; \
119	do \	277	do \
120	{ \	278	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	279	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	280	} \
123	while ((cnt) > newcnt); \	281	while ((cnt) > newcnt); \
124	\	282	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	283	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
126	init (base + cur, newcnt - cur); \	284	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	285	cur = newcnt; \
128	}	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;
129		298
130	/*****************************************************************************/	299	/*****************************************************************************/
131		300
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	301	static void
145	anfds_init (ANFD *base, int count)	302	anfds_init (ANFD *base, int count)
146	{	303	{
147	while (count--)	304	while (count--)
148	{	305	{
149	base->head = 0;	306	base->head = 0;
150	base->wev = base->rev = EV_NONE;	307	base->events = EV_NONE;
		308	base->reify = 0;
		309
151	++base;	310	++base;
152	}	311	}
153	}	312	}
154		313
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	314	static void
165	event (W w, int events)	315	event (EV_P_ W w, int events)
166	{	316	{
167	if (w->active)	317	if (w->pending)
168	{	318	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	319	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		320	return;
173	}	321	}
174	}
175		322
		323	w->pending = ++pendingcnt [ABSPRI (w)];
		324	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		325	pendings [ABSPRI (w)][w->pending - 1].w = w;
		326	pendings [ABSPRI (w)][w->pending - 1].events = events;
		327	}
		328
176	static void	329	static void
		330	queue_events (EV_P_ W *events, int eventcnt, int type)
		331	{
		332	int i;
		333
		334	for (i = 0; i < eventcnt; ++i)
		335	event (EV_A_ events [i], type);
		336	}
		337
		338	static void
177	fd_event (int fd, int events)	339	fd_event (EV_P_ int fd, int events)
178	{	340	{
179	ANFD *anfd = anfds + fd;	341	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	342	struct ev_io *w;
181		343
182	for (w = anfd->head; w; w = w->next)	344	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
183	{	345	{
184	int ev = w->events & events;	346	int ev = w->events & events;
185		347
186	if (ev)	348	if (ev)
187	event ((W)w, ev);	349	event (EV_A_ (W)w, ev);
188	}	350	}
189	}	351	}
190		352
		353	/*****************************************************************************/
		354
191	static void	355	static void
192	queue_events (W *events, int eventcnt, int type)	356	fd_reify (EV_P)
193	{	357	{
194	int i;	358	int i;
195		359
196	for (i = 0; i < eventcnt; ++i)	360	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	361	{
		362	int fd = fdchanges [i];
		363	ANFD *anfd = anfds + fd;
		364	struct ev_io *w;
		365
		366	int events = 0;
		367
		368	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		369	events |= w->events;
		370
		371	anfd->reify = 0;
		372
		373	method_modify (EV_A_ fd, anfd->events, events);
		374	anfd->events = events;
		375	}
		376
		377	fdchangecnt = 0;
		378	}
		379
		380	static void
		381	fd_change (EV_P_ int fd)
		382	{
		383	if (anfds [fd].reify || fdchangecnt < 0)
		384	return;
		385
		386	anfds [fd].reify = 1;
		387
		388	++fdchangecnt;
		389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		390	fdchanges [fdchangecnt - 1] = fd;
		391	}
		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	}
198	}	403	}
199		404
200	/* called on EBADF to verify fds */	405	/* called on EBADF to verify fds */
201	static void	406	static void
202	fd_recheck (void)	407	fd_ebadf (EV_P)
203	{	408	{
204	int fd;	409	int fd;
205		410
206	for (fd = 0; fd < anfdmax; ++fd)	411	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	412	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	413	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	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)
210	{	425	{
211	event ((W)anfds [fd].head, EV_ERROR);	426	fd_kill (EV_A_ fd);
212	evio_stop (anfds [fd].head);	427	return;
213	}	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	}
214	}	444	}
215		445
216	/*****************************************************************************/	446	/*****************************************************************************/
217		447
218	static struct ev_timer **timers;
219	static int timermax, timercnt;
220
221	static struct ev_periodic **periodics;
222	static int periodicmax, periodiccnt;
223
224	static void	448	static void
225	upheap (WT *timers, int k)	449	upheap (WT *heap, int k)
226	{	450	{
227	WT w = timers [k];	451	WT w = heap [k];
228		452
229	while (k && timers [k >> 1]->at > w->at)	453	while (k && heap [k >> 1]->at > w->at)
230	{	454	{
231	timers [k] = timers [k >> 1];	455	heap [k] = heap [k >> 1];
232	timers [k]->active = k + 1;	456	((W)heap [k])->active = k + 1;
233	k >>= 1;	457	k >>= 1;
234	}	458	}
235		459
236	timers [k] = w;	460	heap [k] = w;
237	timers [k]->active = k + 1;	461	((W)heap [k])->active = k + 1;
238		462
239	}	463	}
240		464
241	static void	465	static void
242	downheap (WT *timers, int N, int k)	466	downheap (WT *heap, int N, int k)
243	{	467	{
244	WT w = timers [k];	468	WT w = heap [k];
245		469
246	while (k < (N >> 1))	470	while (k < (N >> 1))
247	{	471	{
248	int j = k << 1;	472	int j = k << 1;
249		473
250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	474	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
251	++j;	475	++j;
252		476
253	if (w->at <= timers [j]->at)	477	if (w->at <= heap [j]->at)
254	break;	478	break;
255		479
256	timers [k] = timers [j];	480	heap [k] = heap [j];
257	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
258	k = j;	482	k = j;
259	}	483	}
260		484
261	timers [k] = w;	485	heap [k] = w;
262	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
263	}	487	}
264		488
265	/*****************************************************************************/	489	/*****************************************************************************/
266		490
267	typedef struct	491	typedef struct
268	{	492	{
269	struct ev_signal *head;	493	WL head;
270	sig_atomic_t gotsig;	494	sig_atomic_t volatile gotsig;
271	} ANSIG;	495	} ANSIG;
272		496
273	static ANSIG *signals;	497	static ANSIG *signals;
274	static int signalmax;	498	static int signalmax;
275		499
276	static int sigpipe [2];	500	static int sigpipe [2];
277	static sig_atomic_t gotsig;	501	static sig_atomic_t volatile gotsig;
278	static struct ev_io sigev;	502	static struct ev_io sigev;
279		503
280	static void	504	static void
281	signals_init (ANSIG *base, int count)	505	signals_init (ANSIG *base, int count)
282	{	506	{
283	while (count--)	507	while (count--)
284	{	508	{
285	base->head = 0;	509	base->head = 0;
286	base->gotsig = 0;	510	base->gotsig = 0;
		511
287	++base;	512	++base;
288	}	513	}
289	}	514	}
290		515
291	static void	516	static void
292	sighandler (int signum)	517	sighandler (int signum)
293	{	518	{
		519	#if WIN32
		520	signal (signum, sighandler);
		521	#endif
		522
294	signals [signum - 1].gotsig = 1;	523	signals [signum - 1].gotsig = 1;
295		524
296	if (!gotsig)	525	if (!gotsig)
297	{	526	{
		527	int old_errno = errno;
298	gotsig = 1;	528	gotsig = 1;
299	write (sigpipe [1], &gotsig, 1);	529	write (sigpipe [1], &signum, 1);
		530	errno = old_errno;
300	}	531	}
301	}	532	}
302		533
303	static void	534	static void
304	sigcb (struct ev_io *iow, int revents)	535	sigcb (EV_P_ struct ev_io *iow, int revents)
305	{	536	{
306	struct ev_signal *w;	537	WL w;
307	int sig;	538	int signum;
308		539
		540	read (sigpipe [0], &revents, 1);
309	gotsig = 0;	541	gotsig = 0;
310	read (sigpipe [0], &revents, 1);
311		542
312	for (sig = signalmax; sig--; )	543	for (signum = signalmax; signum--; )
313	if (signals [sig].gotsig)	544	if (signals [signum].gotsig)
314	{	545	{
315	signals [sig].gotsig = 0;	546	signals [signum].gotsig = 0;
316		547
317	for (w = signals [sig].head; w; w = w->next)	548	for (w = signals [signum].head; w; w = w->next)
318	event ((W)w, EV_SIGNAL);	549	event (EV_A_ (W)w, EV_SIGNAL);
319	}	550	}
320	}	551	}
321		552
322	static void	553	static void
323	siginit (void)	554	siginit (EV_P)
324	{	555	{
		556	#ifndef WIN32
325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	557	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	558	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
327		559
328	/* rather than sort out wether we really need nb, set it */	560	/* rather than sort out wether we really need nb, set it */
329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	561	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	562	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		563	#endif
331		564
332	evio_set (&sigev, sigpipe [0], EV_READ);	565	ev_io_set (&sigev, sigpipe [0], EV_READ);
333	evio_start (&sigev);	566	ev_io_start (EV_A_ &sigev);
		567	ev_unref (EV_A); /* child watcher should not keep loop alive */
334	}	568	}
335		569
336	/*****************************************************************************/	570	/*****************************************************************************/
337		571
338	static struct ev_idle **idles;	572	#ifndef WIN32
339	static int idlemax, idlecnt;
340
341	static struct ev_prepare **prepares;
342	static int preparemax, preparecnt;
343
344	static struct ev_check **checks;
345	static int checkmax, checkcnt;
346
347	/*****************************************************************************/
348		573
349	static struct ev_child *childs [PID_HASHSIZE];	574	static struct ev_child *childs [PID_HASHSIZE];
350	static struct ev_signal childev;	575	static struct ev_signal childev;
351		576
352	#ifndef WCONTINUED	577	#ifndef WCONTINUED
353	# define WCONTINUED 0	578	# define WCONTINUED 0
354	#endif	579	#endif
355		580
356	static void	581	static void
357	childcb (struct ev_signal *sw, int revents)	582	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
358	{	583	{
359	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	{
360	int pid, status;	599	int pid, status;
361		600
362	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	601	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	602	{
364	if (w->pid == pid || w->pid == -1)	603	/* make sure we are called again until all childs have been reaped */
365	{	604	event (EV_A_ (W)sw, EV_SIGNAL);
366	w->status = status;	605
367	event ((W)w, EV_CHILD);	606	child_reap (EV_A_ sw, pid, pid, status);
368	}	607	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		608	}
369	}	609	}
		610
		611	#endif
370		612
371	/*****************************************************************************/	613	/*****************************************************************************/
372		614
		615	#if EV_USE_KQUEUE
		616	# include "ev_kqueue.c"
		617	#endif
373	#if HAVE_EPOLL	618	#if EV_USE_EPOLL
374	# include "ev_epoll.c"	619	# include "ev_epoll.c"
375	#endif	620	#endif
		621	#if EV_USE_POLL
		622	# include "ev_poll.c"
		623	#endif
376	#if HAVE_SELECT	624	#if EV_USE_SELECT
377	# include "ev_select.c"	625	# include "ev_select.c"
378	#endif	626	#endif
379		627
380	int	628	int
381	ev_version_major (void)	629	ev_version_major (void)
…		…
387	ev_version_minor (void)	635	ev_version_minor (void)
388	{	636	{
389	return EV_VERSION_MINOR;	637	return EV_VERSION_MINOR;
390	}	638	}
391		639
392	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)
393	{	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	{
394	if (!ev_method)	661	if (!method)
395	{	662	{
396	#if HAVE_MONOTONIC	663	#if EV_USE_MONOTONIC
397	{	664	{
398	struct timespec ts;	665	struct timespec ts;
399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	666	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
400	have_monotonic = 1;	667	have_monotonic = 1;
401	}	668	}
402	#endif	669	#endif
403		670
404	ev_now = ev_time ();	671	rt_now = ev_time ();
405	now = get_clock ();	672	mn_now = get_clock ();
		673	now_floor = mn_now;
406	diff = ev_now - now;	674	rtmn_diff = rt_now - mn_now;
407		675
		676	if (methods == EVMETHOD_AUTO)
		677	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		678	methods = atoi (getenv ("LIBEV_METHODS"));
		679	else
		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
		689	#if EV_USE_EPOLL
		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);
		694	#endif
		695	#if EV_USE_SELECT
		696	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		697	#endif
		698	}
		699	}
		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])
408	if (pipe (sigpipe))	792	if (pipe (sigpipe))
409	return 0;	793	return 0;
410		794
411	ev_method = EVMETHOD_NONE;	795	if (!default_loop)
412	#if HAVE_EPOLL	796	{
413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	797	#if EV_MULTIPLICITY
		798	struct ev_loop *loop = default_loop = &default_loop_struct;
		799	#else
		800	default_loop = 1;
414	#endif	801	#endif
415	#if HAVE_SELECT
416	if (ev_method == EVMETHOD_NONE) select_init (flags);
417	#endif
418		802
		803	loop_init (EV_A_ methods);
		804
419	if (ev_method)	805	if (ev_method (EV_A))
420	{	806	{
421	evw_init (&sigev, sigcb);	807	ev_watcher_init (&sigev, sigcb);
		808	ev_set_priority (&sigev, EV_MAXPRI);
422	siginit ();	809	siginit (EV_A);
423		810
		811	#ifndef WIN32
424	evsignal_init (&childev, childcb, SIGCHLD);	812	ev_signal_init (&childev, childcb, SIGCHLD);
		813	ev_set_priority (&childev, EV_MAXPRI);
425	evsignal_start (&childev);	814	ev_signal_start (EV_A_ &childev);
		815	ev_unref (EV_A); /* child watcher should not keep loop alive */
		816	#endif
426	}	817	}
		818	else
		819	default_loop = 0;
427	}	820	}
428		821
429	return ev_method;	822	return default_loop;
430	}	823	}
431		824
432	/*****************************************************************************/
433
434	void	825	void
435	ev_prefork (void)	826	ev_default_destroy (void)
436	{	827	{
437	/* nop */	828	#if EV_MULTIPLICITY
438	}	829	struct ev_loop *loop = default_loop;
439
440	void
441	ev_postfork_parent (void)
442	{
443	/* nop */
444	}
445
446	void
447	ev_postfork_child (void)
448	{
449	#if HAVE_EPOLL
450	if (ev_method == EVMETHOD_EPOLL)
451	epoll_postfork_child ();
452	#endif	830	#endif
453		831
		832	ev_ref (EV_A); /* child watcher */
		833	ev_signal_stop (EV_A_ &childev);
		834
		835	ev_ref (EV_A); /* signal watcher */
454	evio_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);
455	close (sigpipe [0]);	854	close (sigpipe [0]);
456	close (sigpipe [1]);	855	close (sigpipe [1]);
457	pipe (sigpipe);	856	pipe (sigpipe);
		857
		858	ev_ref (EV_A); /* signal watcher */
458	siginit ();	859	siginit (EV_A);
459	}	860	}
460		861
461	/*****************************************************************************/	862	/*****************************************************************************/
462		863
463	static void	864	static void
464	fd_reify (void)	865	call_pending (EV_P)
465	{	866	{
466	int i;	867	int pri;
467		868
468	for (i = 0; i < fdchangecnt; ++i)	869	for (pri = NUMPRI; pri--; )
469	{	870	while (pendingcnt [pri])
470	int fd = fdchanges [i];
471	ANFD *anfd = anfds + fd;
472	struct ev_io *w;
473
474	int wev = 0;
475
476	for (w = anfd->head; w; w = w->next)
477	wev |= w->events;
478
479	if (anfd->wev != wev)
480	{	871	{
481	method_modify (fd, anfd->wev, wev);
482	anfd->wev = wev;
483	}
484	}
485
486	fdchangecnt = 0;
487	}
488
489	static void
490	call_pending (void)
491	{
492	while (pendingcnt)
493	{
494	ANPENDING *p = pendings + --pendingcnt;	872	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
495		873
496	if (p->w)	874	if (p->w)
497	{	875	{
498	p->w->pending = 0;	876	p->w->pending = 0;
499	p->w->cb (p->w, p->events);	877	p->w->cb (EV_A_ p->w, p->events);
500	}	878	}
501	}	879	}
502	}	880	}
503		881
504	static void	882	static void
505	timers_reify (void)	883	timers_reify (EV_P)
506	{	884	{
507	while (timercnt && timers [0]->at <= now)	885	while (timercnt && ((WT)timers [0])->at <= mn_now)
508	{	886	{
509	struct ev_timer *w = timers [0];	887	struct ev_timer *w = timers [0];
510		888
511	event ((W)w, EV_TIMEOUT);	889	assert (("inactive timer on timer heap detected", ev_is_active (w)));
512		890
513	/* first reschedule or stop timer */	891	/* first reschedule or stop timer */
514	if (w->repeat)	892	if (w->repeat)
515	{	893	{
		894	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
516	w->at = now + w->repeat;	895	((WT)w)->at = mn_now + w->repeat;
517	assert (("timer timeout in the past, negative repeat?", w->at > now));
518	downheap ((WT *)timers, timercnt, 0);	896	downheap ((WT *)timers, timercnt, 0);
519	}	897	}
520	else	898	else
521	evtimer_stop (w); /* nonrepeating: stop timer */	899	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
522	}
523	}
524		900
		901	event (EV_A_ (W)w, EV_TIMEOUT);
		902	}
		903	}
		904
525	static void	905	static void
526	periodics_reify (void)	906	periodics_reify (EV_P)
527	{	907	{
528	while (periodiccnt && periodics [0]->at <= ev_now)	908	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
529	{	909	{
530	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)));
531		913
532	/* first reschedule or stop timer */	914	/* first reschedule or stop timer */
533	if (w->interval)	915	if (w->interval)
534	{	916	{
535	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;
536	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));
537	downheap ((WT *)periodics, periodiccnt, 0);	919	downheap ((WT *)periodics, periodiccnt, 0);
538	}	920	}
539	else	921	else
540	evperiodic_stop (w); /* nonrepeating: stop timer */	922	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
541		923
542	event ((W)w, EV_TIMEOUT);	924	event (EV_A_ (W)w, EV_PERIODIC);
543	}	925	}
544	}	926	}
545		927
546	static void	928	static void
547	periodics_reschedule (ev_tstamp diff)	929	periodics_reschedule (EV_P)
548	{	930	{
549	int i;	931	int i;
550		932
551	/* adjust periodics after time jump */	933	/* adjust periodics after time jump */
552	for (i = 0; i < periodiccnt; ++i)	934	for (i = 0; i < periodiccnt; ++i)
553	{	935	{
554	struct ev_periodic *w = periodics [i];	936	struct ev_periodic *w = periodics [i];
555		937
556	if (w->interval)	938	if (w->interval)
557	{	939	{
558	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;
559		941
560	if (fabs (diff) >= 1e-4)	942	if (fabs (diff) >= 1e-4)
561	{	943	{
562	evperiodic_stop (w);	944	ev_periodic_stop (EV_A_ w);
563	evperiodic_start (w);	945	ev_periodic_start (EV_A_ w);
564		946
565	i = 0; /* restart loop, inefficient, but time jumps should be rare */	947	i = 0; /* restart loop, inefficient, but time jumps should be rare */
566	}	948	}
567	}	949	}
568	}	950	}
569	}	951	}
570		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
571	static void	971	static void
572	time_update (void)	972	time_update (EV_P)
573	{	973	{
574	int i;	974	int i;
575		975
576	ev_now = ev_time ();	976	#if EV_USE_MONOTONIC
577
578	if (have_monotonic)	977	if (expect_true (have_monotonic))
579	{	978	{
580	ev_tstamp odiff = diff;	979	if (time_update_monotonic (EV_A))
581
582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
583	{	980	{
584	now = get_clock ();	981	ev_tstamp odiff = rtmn_diff;
		982
		983	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		984	{
585	diff = ev_now - now;	985	rtmn_diff = rt_now - mn_now;
586		986
587	if (fabs (odiff - diff) < MIN_TIMEJUMP)	987	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
588	return; /* all is well */	988	return; /* all is well */
589		989
590	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) */
591	}	998	}
592
593	periodics_reschedule (diff - odiff);
594	/* no timer adjustment, as the monotonic clock doesn't jump */
595	}	999	}
596	else	1000	else
		1001	#endif
597	{	1002	{
598	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))
599	{	1006	{
600	periodics_reschedule (ev_now - now);	1007	periodics_reschedule (EV_A);
601		1008
602	/* 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 */
603	for (i = 0; i < timercnt; ++i)	1010	for (i = 0; i < timercnt; ++i)
604	timers [i]->at += diff;	1011	((WT)timers [i])->at += rt_now - mn_now;
605	}	1012	}
606		1013
607	now = ev_now;	1014	mn_now = rt_now;
608	}	1015	}
609	}	1016	}
610		1017
611	int ev_loop_done;	1018	void
		1019	ev_ref (EV_P)
		1020	{
		1021	++activecnt;
		1022	}
612		1023
		1024	void
		1025	ev_unref (EV_P)
		1026	{
		1027	--activecnt;
		1028	}
		1029
		1030	static int loop_done;
		1031
		1032	void
613	void ev_loop (int flags)	1033	ev_loop (EV_P_ int flags)
614	{	1034	{
615	double block;	1035	double block;
616	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1036	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
617		1037
618	do	1038	do
619	{	1039	{
620	/* queue check watchers (and execute them) */	1040	/* queue check watchers (and execute them) */
621	if (preparecnt)	1041	if (expect_false (preparecnt))
622	{	1042	{
623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1043	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
624	call_pending ();	1044	call_pending (EV_A);
625	}	1045	}
626		1046
627	/* update fd-related kernel structures */	1047	/* update fd-related kernel structures */
628	fd_reify ();	1048	fd_reify (EV_A);
629		1049
630	/* calculate blocking time */	1050	/* calculate blocking time */
631		1051
632	/* 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
633	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	{
634	ev_now = ev_time ();	1060	rt_now = ev_time ();
		1061	mn_now = rt_now;
		1062	}
635		1063
636	if (flags & EVLOOP_NONBLOCK || idlecnt)	1064	if (flags & EVLOOP_NONBLOCK || idlecnt)
637	block = 0.;	1065	block = 0.;
638	else	1066	else
639	{	1067	{
640	block = MAX_BLOCKTIME;	1068	block = MAX_BLOCKTIME;
641		1069
642	if (timercnt)	1070	if (timercnt)
643	{	1071	{
644	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;
645	if (block > to) block = to;	1073	if (block > to) block = to;
646	}	1074	}
647		1075
648	if (periodiccnt)	1076	if (periodiccnt)
649	{	1077	{
650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1078	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
651	if (block > to) block = to;	1079	if (block > to) block = to;
652	}	1080	}
653		1081
654	if (block < 0.) block = 0.;	1082	if (block < 0.) block = 0.;
655	}	1083	}
656		1084
657	method_poll (block);	1085	method_poll (EV_A_ block);
658		1086
659	/* update ev_now, do magic */	1087	/* update rt_now, do magic */
660	time_update ();	1088	time_update (EV_A);
661		1089
662	/* queue pending timers and reschedule them */	1090	/* queue pending timers and reschedule them */
663	timers_reify (); /* relative timers called last */	1091	timers_reify (EV_A); /* relative timers called last */
664	periodics_reify (); /* absolute timers called first */	1092	periodics_reify (EV_A); /* absolute timers called first */
665		1093
666	/* queue idle watchers unless io or timers are pending */	1094	/* queue idle watchers unless io or timers are pending */
667	if (!pendingcnt)	1095	if (!pendingcnt)
668	queue_events ((W *)idles, idlecnt, EV_IDLE);	1096	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
669		1097
670	/* queue check watchers, to be executed first */	1098	/* queue check watchers, to be executed first */
671	if (checkcnt)	1099	if (checkcnt)
672	queue_events ((W *)checks, checkcnt, EV_CHECK);	1100	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
673		1101
674	call_pending ();	1102	call_pending (EV_A);
675	}	1103	}
676	while (!ev_loop_done);	1104	while (activecnt && !loop_done);
677		1105
678	if (ev_loop_done != 2)	1106	if (loop_done != 2)
679	ev_loop_done = 0;	1107	loop_done = 0;
		1108	}
		1109
		1110	void
		1111	ev_unloop (EV_P_ int how)
		1112	{
		1113	loop_done = how;
680	}	1114	}
681		1115
682	/*****************************************************************************/	1116	/*****************************************************************************/
683		1117
684	static void	1118	inline void
685	wlist_add (WL *head, WL elem)	1119	wlist_add (WL *head, WL elem)
686	{	1120	{
687	elem->next = *head;	1121	elem->next = *head;
688	*head = elem;	1122	*head = elem;
689	}	1123	}
690		1124
691	static void	1125	inline void
692	wlist_del (WL *head, WL elem)	1126	wlist_del (WL *head, WL elem)
693	{	1127	{
694	while (*head)	1128	while (*head)
695	{	1129	{
696	if (*head == elem)	1130	if (*head == elem)
…		…
701		1135
702	head = &(*head)->next;	1136	head = &(*head)->next;
703	}	1137	}
704	}	1138	}
705		1139
706	static void	1140	inline void
707	ev_clear (W w)	1141	ev_clear_pending (EV_P_ W w)
708	{	1142	{
709	if (w->pending)	1143	if (w->pending)
710	{	1144	{
711	pendings [w->pending - 1].w = 0;	1145	pendings [ABSPRI (w)][w->pending - 1].w = 0;
712	w->pending = 0;	1146	w->pending = 0;
713	}	1147	}
714	}	1148	}
715		1149
716	static void	1150	inline void
717	ev_start (W w, int active)	1151	ev_start (EV_P_ W w, int active)
718	{	1152	{
		1153	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1154	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1155
719	w->active = active;	1156	w->active = active;
		1157	ev_ref (EV_A);
720	}	1158	}
721		1159
722	static void	1160	inline void
723	ev_stop (W w)	1161	ev_stop (EV_P_ W w)
724	{	1162	{
		1163	ev_unref (EV_A);
725	w->active = 0;	1164	w->active = 0;
726	}	1165	}
727		1166
728	/*****************************************************************************/	1167	/*****************************************************************************/
729		1168
730	void	1169	void
731	evio_start (struct ev_io *w)	1170	ev_io_start (EV_P_ struct ev_io *w)
732	{	1171	{
		1172	int fd = w->fd;
		1173
733	if (ev_is_active (w))	1174	if (ev_is_active (w))
734	return;	1175	return;
735		1176
736	int fd = w->fd;	1177	assert (("ev_io_start called with negative fd", fd >= 0));
737		1178
738	ev_start ((W)w, 1);	1179	ev_start (EV_A_ (W)w, 1);
739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1180	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
740	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1181	wlist_add ((WL *)&anfds[fd].head, (WL)w);
741		1182
742	++fdchangecnt;	1183	fd_change (EV_A_ fd);
743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
744	fdchanges [fdchangecnt - 1] = fd;
745
746	if (w->fd == 9)
747	printf ("start %p:%x\n", w, w->events);//D
748	}	1184	}
749		1185
750	void	1186	void
751	evio_stop (struct ev_io *w)	1187	ev_io_stop (EV_P_ struct ev_io *w)
752	{	1188	{
753	if (w->fd == 9)	1189	ev_clear_pending (EV_A_ (W)w);
754	printf ("stop %p:%x\n", w, w->events);//D
755	ev_clear ((W)w);
756	if (!ev_is_active (w))	1190	if (!ev_is_active (w))
757	return;	1191	return;
758		1192
759	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1193	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
760	ev_stop ((W)w);	1194	ev_stop (EV_A_ (W)w);
761		1195
762	++fdchangecnt;	1196	fd_change (EV_A_ w->fd);
763	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
764	fdchanges [fdchangecnt - 1] = w->fd;
765	}	1197	}
766		1198
767	void	1199	void
768	evtimer_start (struct ev_timer *w)	1200	ev_timer_start (EV_P_ struct ev_timer *w)
769	{	1201	{
770	if (ev_is_active (w))	1202	if (ev_is_active (w))
771	return;	1203	return;
772		1204
773	w->at += now;	1205	((WT)w)->at += mn_now;
774		1206
775	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.));
776		1208
777	ev_start ((W)w, ++timercnt);	1209	ev_start (EV_A_ (W)w, ++timercnt);
778	array_needsize (timers, timermax, timercnt, );	1210	array_needsize (timers, timermax, timercnt, );
779	timers [timercnt - 1] = w;	1211	timers [timercnt - 1] = w;
780	upheap ((WT *)timers, timercnt - 1);	1212	upheap ((WT *)timers, timercnt - 1);
781	}
782		1213
		1214	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1215	}
		1216
783	void	1217	void
784	evtimer_stop (struct ev_timer *w)	1218	ev_timer_stop (EV_P_ struct ev_timer *w)
785	{	1219	{
786	ev_clear ((W)w);	1220	ev_clear_pending (EV_A_ (W)w);
787	if (!ev_is_active (w))	1221	if (!ev_is_active (w))
788	return;	1222	return;
789		1223
		1224	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1225
790	if (w->active < timercnt--)	1226	if (((W)w)->active < timercnt--)
791	{	1227	{
792	timers [w->active - 1] = timers [timercnt];	1228	timers [((W)w)->active - 1] = timers [timercnt];
793	downheap ((WT *)timers, timercnt, w->active - 1);	1229	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
794	}	1230	}
795		1231
796	w->at = w->repeat;	1232	((WT)w)->at = w->repeat;
797		1233
798	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
799	}	1235	}
800		1236
801	void	1237	void
802	evtimer_again (struct ev_timer *w)	1238	ev_timer_again (EV_P_ struct ev_timer *w)
803	{	1239	{
804	if (ev_is_active (w))	1240	if (ev_is_active (w))
805	{	1241	{
806	if (w->repeat)	1242	if (w->repeat)
807	{	1243	{
808	w->at = now + w->repeat;	1244	((WT)w)->at = mn_now + w->repeat;
809	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
810	}	1246	}
811	else	1247	else
812	evtimer_stop (w);	1248	ev_timer_stop (EV_A_ w);
813	}	1249	}
814	else if (w->repeat)	1250	else if (w->repeat)
815	evtimer_start (w);	1251	ev_timer_start (EV_A_ w);
816	}	1252	}
817		1253
818	void	1254	void
819	evperiodic_start (struct ev_periodic *w)	1255	ev_periodic_start (EV_P_ struct ev_periodic *w)
820	{	1256	{
821	if (ev_is_active (w))	1257	if (ev_is_active (w))
822	return;	1258	return;
823		1259
824	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.));
825		1261
826	/* 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 */
827	if (w->interval)	1263	if (w->interval)
828	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;
829		1265
830	ev_start ((W)w, ++periodiccnt);	1266	ev_start (EV_A_ (W)w, ++periodiccnt);
831	array_needsize (periodics, periodicmax, periodiccnt, );	1267	array_needsize (periodics, periodicmax, periodiccnt, );
832	periodics [periodiccnt - 1] = w;	1268	periodics [periodiccnt - 1] = w;
833	upheap ((WT *)periodics, periodiccnt - 1);	1269	upheap ((WT *)periodics, periodiccnt - 1);
834	}
835		1270
		1271	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1272	}
		1273
836	void	1274	void
837	evperiodic_stop (struct ev_periodic *w)	1275	ev_periodic_stop (EV_P_ struct ev_periodic *w)
838	{	1276	{
839	ev_clear ((W)w);	1277	ev_clear_pending (EV_A_ (W)w);
840	if (!ev_is_active (w))	1278	if (!ev_is_active (w))
841	return;	1279	return;
842		1280
		1281	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1282
843	if (w->active < periodiccnt--)	1283	if (((W)w)->active < periodiccnt--)
844	{	1284	{
845	periodics [w->active - 1] = periodics [periodiccnt];	1285	periodics [((W)w)->active - 1] = periodics [periodiccnt];
846	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1286	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
847	}	1287	}
848		1288
849	ev_stop ((W)w);	1289	ev_stop (EV_A_ (W)w);
850	}	1290	}
851		1291
852	void	1292	void
853	evsignal_start (struct ev_signal *w)	1293	ev_idle_start (EV_P_ struct ev_idle *w)
854	{	1294	{
855	if (ev_is_active (w))	1295	if (ev_is_active (w))
856	return;	1296	return;
857		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
858	ev_start ((W)w, 1);	1373	ev_start (EV_A_ (W)w, 1);
859	array_needsize (signals, signalmax, w->signum, signals_init);	1374	array_needsize (signals, signalmax, w->signum, signals_init);
860	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1375	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
861		1376
862	if (!w->next)	1377	if (!((WL)w)->next)
863	{	1378	{
		1379	#if WIN32
		1380	signal (w->signum, sighandler);
		1381	#else
864	struct sigaction sa;	1382	struct sigaction sa;
865	sa.sa_handler = sighandler;	1383	sa.sa_handler = sighandler;
866	sigfillset (&sa.sa_mask);	1384	sigfillset (&sa.sa_mask);
867	sa.sa_flags = 0;	1385	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
868	sigaction (w->signum, &sa, 0);	1386	sigaction (w->signum, &sa, 0);
		1387	#endif
869	}	1388	}
870	}	1389	}
871		1390
872	void	1391	void
873	evsignal_stop (struct ev_signal *w)	1392	ev_signal_stop (EV_P_ struct ev_signal *w)
874	{	1393	{
875	ev_clear ((W)w);	1394	ev_clear_pending (EV_A_ (W)w);
876	if (!ev_is_active (w))	1395	if (!ev_is_active (w))
877	return;	1396	return;
878		1397
879	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1398	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
880	ev_stop ((W)w);	1399	ev_stop (EV_A_ (W)w);
881		1400
882	if (!signals [w->signum - 1].head)	1401	if (!signals [w->signum - 1].head)
883	signal (w->signum, SIG_DFL);	1402	signal (w->signum, SIG_DFL);
884	}	1403	}
885		1404
886	void evidle_start (struct ev_idle *w)	1405	void
		1406	ev_child_start (EV_P_ struct ev_child *w)
887	{	1407	{
		1408	#if EV_MULTIPLICITY
		1409	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1410	#endif
888	if (ev_is_active (w))	1411	if (ev_is_active (w))
889	return;	1412	return;
890		1413
891	ev_start ((W)w, ++idlecnt);	1414	ev_start (EV_A_ (W)w, 1);
892	array_needsize (idles, idlemax, idlecnt, );	1415	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
893	idles [idlecnt - 1] = w;
894	}	1416	}
895		1417
896	void evidle_stop (struct ev_idle *w)	1418	void
		1419	ev_child_stop (EV_P_ struct ev_child *w)
897	{	1420	{
898	ev_clear ((W)w);	1421	ev_clear_pending (EV_A_ (W)w);
899	if (ev_is_active (w))	1422	if (ev_is_active (w))
900	return;	1423	return;
901		1424
902	idles [w->active - 1] = idles [--idlecnt];
903	ev_stop ((W)w);
904	}
905
906	void evprepare_start (struct ev_prepare *w)
907	{
908	if (ev_is_active (w))
909	return;
910
911	ev_start ((W)w, ++preparecnt);
912	array_needsize (prepares, preparemax, preparecnt, );
913	prepares [preparecnt - 1] = w;
914	}
915
916	void evprepare_stop (struct ev_prepare *w)
917	{
918	ev_clear ((W)w);
919	if (ev_is_active (w))
920	return;
921
922	prepares [w->active - 1] = prepares [--preparecnt];
923	ev_stop ((W)w);
924	}
925
926	void evcheck_start (struct ev_check *w)
927	{
928	if (ev_is_active (w))
929	return;
930
931	ev_start ((W)w, ++checkcnt);
932	array_needsize (checks, checkmax, checkcnt, );
933	checks [checkcnt - 1] = w;
934	}
935
936	void evcheck_stop (struct ev_check *w)
937	{
938	ev_clear ((W)w);
939	if (ev_is_active (w))
940	return;
941
942	checks [w->active - 1] = checks [--checkcnt];
943	ev_stop ((W)w);
944	}
945
946	void evchild_start (struct ev_child *w)
947	{
948	if (ev_is_active (w))
949	return;
950
951	ev_start ((W)w, 1);
952	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
953	}
954
955	void evchild_stop (struct ev_child *w)
956	{
957	ev_clear ((W)w);
958	if (ev_is_active (w))
959	return;
960
961	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1425	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
962	ev_stop ((W)w);	1426	ev_stop (EV_A_ (W)w);
963	}	1427	}
964		1428
965	/*****************************************************************************/	1429	/*****************************************************************************/
966		1430
967	struct ev_once	1431	struct ev_once
…		…
971	void (*cb)(int revents, void *arg);	1435	void (*cb)(int revents, void *arg);
972	void *arg;	1436	void *arg;
973	};	1437	};
974		1438
975	static void	1439	static void
976	once_cb (struct ev_once *once, int revents)	1440	once_cb (EV_P_ struct ev_once *once, int revents)
977	{	1441	{
978	void (*cb)(int revents, void *arg) = once->cb;	1442	void (*cb)(int revents, void *arg) = once->cb;
979	void *arg = once->arg;	1443	void *arg = once->arg;
980		1444
981	evio_stop (&once->io);	1445	ev_io_stop (EV_A_ &once->io);
982	evtimer_stop (&once->to);	1446	ev_timer_stop (EV_A_ &once->to);
983	free (once);	1447	ev_free (once);
984		1448
985	cb (revents, arg);	1449	cb (revents, arg);
986	}	1450	}
987		1451
988	static void	1452	static void
989	once_cb_io (struct ev_io *w, int revents)	1453	once_cb_io (EV_P_ struct ev_io *w, int revents)
990	{	1454	{
991	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);
992	}	1456	}
993		1457
994	static void	1458	static void
995	once_cb_to (struct ev_timer *w, int revents)	1459	once_cb_to (EV_P_ struct ev_timer *w, int revents)
996	{	1460	{
997	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);
998	}	1462	}
999		1463
1000	void	1464	void
1001	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)
1002	{	1466	{
1003	struct ev_once *once = malloc (sizeof (struct ev_once));	1467	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1004		1468
1005	if (!once)	1469	if (!once)
1006	cb (EV_ERROR, arg);	1470	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1007	else	1471	else
1008	{	1472	{
1009	once->cb = cb;	1473	once->cb = cb;
1010	once->arg = arg;	1474	once->arg = arg;
1011		1475
1012	evw_init (&once->io, once_cb_io);	1476	ev_watcher_init (&once->io, once_cb_io);
1013
1014	if (fd >= 0)	1477	if (fd >= 0)
1015	{	1478	{
1016	evio_set (&once->io, fd, events);	1479	ev_io_set (&once->io, fd, events);
1017	evio_start (&once->io);	1480	ev_io_start (EV_A_ &once->io);
1018	}	1481	}
1019		1482
1020	evw_init (&once->to, once_cb_to);	1483	ev_watcher_init (&once->to, once_cb_to);
1021
1022	if (timeout >= 0.)	1484	if (timeout >= 0.)
1023	{	1485	{
1024	evtimer_set (&once->to, timeout, 0.);	1486	ev_timer_set (&once->to, timeout, 0.);
1025	evtimer_start (&once->to);	1487	ev_timer_start (EV_A_ &once->to);
1026	}	1488	}
1027	}	1489	}
1028	}	1490	}
1029		1491
1030	/*****************************************************************************/
1031
1032	#if 0
1033
1034	struct ev_io wio;
1035
1036	static void
1037	sin_cb (struct ev_io *w, int revents)
1038	{
1039	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1040	}
1041
1042	static void
1043	ocb (struct ev_timer *w, int revents)
1044	{
1045	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1046	evtimer_stop (w);
1047	evtimer_start (w);
1048	}
1049
1050	static void
1051	scb (struct ev_signal *w, int revents)
1052	{
1053	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1054	evio_stop (&wio);
1055	evio_start (&wio);
1056	}
1057
1058	static void
1059	gcb (struct ev_signal *w, int revents)
1060	{
1061	fprintf (stderr, "generic %x\n", revents);
1062
1063	}
1064
1065	int main (void)
1066	{
1067	ev_init (0);
1068
1069	evio_init (&wio, sin_cb, 0, EV_READ);
1070	evio_start (&wio);
1071
1072	struct ev_timer t[10000];
1073
1074	#if 0
1075	int i;
1076	for (i = 0; i < 10000; ++i)
1077	{
1078	struct ev_timer *w = t + i;
1079	evw_init (w, ocb, i);
1080	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1081	evtimer_start (w);
1082	if (drand48 () < 0.5)
1083	evtimer_stop (w);
1084	}
1085	#endif
1086
1087	struct ev_timer t1;
1088	evtimer_init (&t1, ocb, 5, 10);
1089	evtimer_start (&t1);
1090
1091	struct ev_signal sig;
1092	evsignal_init (&sig, scb, SIGQUIT);
1093	evsignal_start (&sig);
1094
1095	struct ev_check cw;
1096	evcheck_init (&cw, gcb);
1097	evcheck_start (&cw);
1098
1099	struct ev_idle iw;
1100	evidle_init (&iw, gcb);
1101	evidle_start (&iw);
1102
1103	ev_loop (0);
1104
1105	return 0;
1106	}
1107
1108	#endif
1109
1110
1111
1112

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