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Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.84 by root, Fri Nov 9 23:04:35 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>
33	#include <fcntl.h>	59	#include <fcntl.h>
34	#include <signal.h>
35	#include <stddef.h>	60	#include <stddef.h>
36		61
37	#include <stdio.h>	62	#include <stdio.h>
38		63
39	#include <assert.h>	64	#include <assert.h>
40	#include <errno.h>	65	#include <errno.h>
41	#include <sys/time.h>	66	#include <sys/types.h>
42	#include <time.h>	67	#include <time.h>
43		68
44	#define HAVE_EPOLL 1	69	#include <signal.h>
45		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
46	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
		80	#endif
		81
		82	#ifndef EV_USE_SELECT
		83	# define EV_USE_SELECT 1
		84	#endif
		85
		86	#ifndef EV_USE_POLL
		87	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		88	#endif
		89
		90	#ifndef EV_USE_EPOLL
		91	# define EV_USE_EPOLL 0
		92	#endif
		93
		94	#ifndef EV_USE_KQUEUE
		95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
49	# endif	105	# endif
50	#endif	106	#endif
51		107
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	108	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
62	#endif	110	#endif
		111
		112	/**/
		113
		114	#ifndef CLOCK_MONOTONIC
		115	# undef EV_USE_MONOTONIC
		116	# define EV_USE_MONOTONIC 0
		117	#endif
		118
		119	#ifndef CLOCK_REALTIME
		120	# undef EV_USE_REALTIME
		121	# define EV_USE_REALTIME 0
		122	#endif
		123
		124	/**/
63		125
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	126	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	127	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		128	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		129	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
66		130
		131	#ifdef EV_H
		132	# include EV_H
		133	#else
67	#include "ev.h"	134	# include "ev.h"
		135	#endif
		136
		137	#if __GNUC__ >= 3
		138	# define expect(expr,value) __builtin_expect ((expr),(value))
		139	# define inline inline
		140	#else
		141	# define expect(expr,value) (expr)
		142	# define inline static
		143	#endif
		144
		145	#define expect_false(expr) expect ((expr) != 0, 0)
		146	#define expect_true(expr) expect ((expr) != 0, 1)
		147
		148	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		149	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
68		150
69	typedef struct ev_watcher *W;	151	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	152	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	153	typedef struct ev_watcher_time *WT;
72		154
73	static ev_tstamp now, diff; /* monotonic clock */	155	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
74	ev_tstamp ev_now;
75	int ev_method;
76		156
77	static int have_monotonic; /* runtime */	157	#include "ev_win32.c"
78
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		158
83	/*****************************************************************************/	159	/*****************************************************************************/
84		160
85	ev_tstamp	161	static void (*syserr_cb)(const char *msg);
		162
		163	void ev_set_syserr_cb (void (*cb)(const char *msg))
		164	{
		165	syserr_cb = cb;
		166	}
		167
		168	static void
		169	syserr (const char *msg)
		170	{
		171	if (!msg)
		172	msg = "(libev) system error";
		173
		174	if (syserr_cb)
		175	syserr_cb (msg);
		176	else
		177	{
		178	perror (msg);
		179	abort ();
		180	}
		181	}
		182
		183	static void *(*alloc)(void *ptr, long size);
		184
		185	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		186	{
		187	alloc = cb;
		188	}
		189
		190	static void *
		191	ev_realloc (void *ptr, long size)
		192	{
		193	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		194
		195	if (!ptr && size)
		196	{
		197	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		198	abort ();
		199	}
		200
		201	return ptr;
		202	}
		203
		204	#define ev_malloc(size) ev_realloc (0, (size))
		205	#define ev_free(ptr) ev_realloc ((ptr), 0)
		206
		207	/*****************************************************************************/
		208
		209	typedef struct
		210	{
		211	WL head;
		212	unsigned char events;
		213	unsigned char reify;
		214	} ANFD;
		215
		216	typedef struct
		217	{
		218	W w;
		219	int events;
		220	} ANPENDING;
		221
		222	#if EV_MULTIPLICITY
		223
		224	struct ev_loop
		225	{
		226	#define VAR(name,decl) decl;
		227	#include "ev_vars.h"
		228	#undef VAR
		229	};
		230	#include "ev_wrap.h"
		231
		232	struct ev_loop default_loop_struct;
		233	static struct ev_loop *default_loop;
		234
		235	#else
		236
		237	#define VAR(name,decl) static decl;
		238	#include "ev_vars.h"
		239	#undef VAR
		240
		241	static int default_loop;
		242
		243	#endif
		244
		245	/*****************************************************************************/
		246
		247	inline ev_tstamp
86	ev_time (void)	248	ev_time (void)
87	{	249	{
88	#if HAVE_REALTIME	250	#if EV_USE_REALTIME
89	struct timespec ts;	251	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	252	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	253	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	254	#else
93	struct timeval tv;	255	struct timeval tv;
94	gettimeofday (&tv, 0);	256	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	257	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	258	#endif
97	}	259	}
98		260
99	static ev_tstamp	261	inline ev_tstamp
100	get_clock (void)	262	get_clock (void)
101	{	263	{
102	#if HAVE_MONOTONIC	264	#if EV_USE_MONOTONIC
103	if (have_monotonic)	265	if (expect_true (have_monotonic))
104	{	266	{
105	struct timespec ts;	267	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	268	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	269	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	270	}
109	#endif	271	#endif
110		272
111	return ev_time ();	273	return ev_time ();
112	}	274	}
113		275
		276	ev_tstamp
		277	ev_now (EV_P)
		278	{
		279	return rt_now;
		280	}
		281
		282	#define array_roundsize(type,n) ((n) | 4 & ~3)
		283
114	#define array_needsize(base,cur,cnt,init) \	284	#define array_needsize(type,base,cur,cnt,init) \
115	if ((cnt) > cur) \	285	if (expect_false ((cnt) > cur)) \
116	{ \	286	{ \
117	int newcnt = cur ? cur << 1 : 16; \	287	int newcnt = cur; \
		288	do \
		289	{ \
		290	newcnt = array_roundsize (type, newcnt << 1); \
		291	} \
		292	while ((cnt) > newcnt); \
		293	\
118	base = realloc (base, sizeof (*base) * (newcnt)); \	294	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
119	init (base + cur, newcnt - cur); \	295	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	296	cur = newcnt; \
121	}	297	}
		298
		299	#define array_slim(type,stem) \
		300	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		301	{ \
		302	stem ## max = array_roundsize (stem ## cnt >> 1); \
		303	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
		304	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		305	}
		306
		307	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		308	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		309	#define array_free_microshit(stem) \
		310	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		311
		312	#define array_free(stem, idx) \
		313	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
122		314
123	/*****************************************************************************/	315	/*****************************************************************************/
124		316
125	typedef struct
126	{
127	struct ev_io *head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void	317	static void
138	anfds_init (ANFD *base, int count)	318	anfds_init (ANFD *base, int count)
139	{	319	{
140	while (count--)	320	while (count--)
141	{	321	{
142	base->head = 0;	322	base->head = 0;
143	base->wev = base->rev = EV_NONE;	323	base->events = EV_NONE;
		324	base->reify = 0;
		325
144	++base;	326	++base;
145	}	327	}
146	}	328	}
147		329
148	typedef struct	330	void
		331	ev_feed_event (EV_P_ void *w, int revents)
149	{	332	{
150	W w;	333	W w_ = (W)w;
151	int events;
152	} ANPENDING;
153		334
154	static ANPENDING *pendings;	335	if (w_->pending)
155	static int pendingmax, pendingcnt;
156
157	static void
158	event (W w, int events)
159	{
160	if (w->active)
161	{	336	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	337	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
		338	return;
166	}	339	}
167	}
168		340
		341	w_->pending = ++pendingcnt [ABSPRI (w_)];
		342	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		343	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		344	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		345	}
		346
169	static void	347	static void
		348	queue_events (EV_P_ W *events, int eventcnt, int type)
		349	{
		350	int i;
		351
		352	for (i = 0; i < eventcnt; ++i)
		353	ev_feed_event (EV_A_ events [i], type);
		354	}
		355
		356	inline void
170	fd_event (int fd, int events)	357	fd_event (EV_P_ int fd, int revents)
171	{	358	{
172	ANFD *anfd = anfds + fd;	359	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	360	struct ev_io *w;
174		361
175	for (w = anfd->head; w; w = w->next)	362	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
176	{	363	{
177	int ev = w->events & events;	364	int ev = w->events & revents;
178		365
179	if (ev)	366	if (ev)
180	event ((W)w, ev);	367	ev_feed_event (EV_A_ (W)w, ev);
181	}	368	}
182	}	369	}
183		370
		371	void
		372	ev_feed_fd_event (EV_P_ int fd, int revents)
		373	{
		374	fd_event (EV_A_ fd, revents);
		375	}
		376
		377	/*****************************************************************************/
		378
184	static void	379	static void
185	queue_events (W *events, int eventcnt, int type)	380	fd_reify (EV_P)
186	{	381	{
187	int i;	382	int i;
188		383
189	for (i = 0; i < eventcnt; ++i)	384	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	385	{
		386	int fd = fdchanges [i];
		387	ANFD *anfd = anfds + fd;
		388	struct ev_io *w;
		389
		390	int events = 0;
		391
		392	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		393	events |= w->events;
		394
		395	anfd->reify = 0;
		396
		397	method_modify (EV_A_ fd, anfd->events, events);
		398	anfd->events = events;
		399	}
		400
		401	fdchangecnt = 0;
		402	}
		403
		404	static void
		405	fd_change (EV_P_ int fd)
		406	{
		407	if (anfds [fd].reify)
		408	return;
		409
		410	anfds [fd].reify = 1;
		411
		412	++fdchangecnt;
		413	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		414	fdchanges [fdchangecnt - 1] = fd;
		415	}
		416
		417	static void
		418	fd_kill (EV_P_ int fd)
		419	{
		420	struct ev_io *w;
		421
		422	while ((w = (struct ev_io *)anfds [fd].head))
		423	{
		424	ev_io_stop (EV_A_ w);
		425	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		426	}
		427	}
		428
		429	static int
		430	fd_valid (int fd)
		431	{
		432	#ifdef WIN32
		433	return !!win32_get_osfhandle (fd);
		434	#else
		435	return fcntl (fd, F_GETFD) != -1;
		436	#endif
		437	}
		438
		439	/* called on EBADF to verify fds */
		440	static void
		441	fd_ebadf (EV_P)
		442	{
		443	int fd;
		444
		445	for (fd = 0; fd < anfdmax; ++fd)
		446	if (anfds [fd].events)
		447	if (!fd_valid (fd) == -1 && errno == EBADF)
		448	fd_kill (EV_A_ fd);
		449	}
		450
		451	/* called on ENOMEM in select/poll to kill some fds and retry */
		452	static void
		453	fd_enomem (EV_P)
		454	{
		455	int fd;
		456
		457	for (fd = anfdmax; fd--; )
		458	if (anfds [fd].events)
		459	{
		460	fd_kill (EV_A_ fd);
		461	return;
		462	}
		463	}
		464
		465	/* usually called after fork if method needs to re-arm all fds from scratch */
		466	static void
		467	fd_rearm_all (EV_P)
		468	{
		469	int fd;
		470
		471	/* this should be highly optimised to not do anything but set a flag */
		472	for (fd = 0; fd < anfdmax; ++fd)
		473	if (anfds [fd].events)
		474	{
		475	anfds [fd].events = 0;
		476	fd_change (EV_A_ fd);
		477	}
191	}	478	}
192		479
193	/*****************************************************************************/	480	/*****************************************************************************/
194		481
195	static struct ev_timer **timers;
196	static int timermax, timercnt;
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void	482	static void
202	upheap (WT *timers, int k)	483	upheap (WT *heap, int k)
203	{	484	{
204	WT w = timers [k];	485	WT w = heap [k];
205		486
206	while (k && timers [k >> 1]->at > w->at)	487	while (k && heap [k >> 1]->at > w->at)
207	{	488	{
208	timers [k] = timers [k >> 1];	489	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	490	((W)heap [k])->active = k + 1;
210	k >>= 1;	491	k >>= 1;
211	}	492	}
212		493
213	timers [k] = w;	494	heap [k] = w;
214	timers [k]->active = k + 1;	495	((W)heap [k])->active = k + 1;
215		496
216	}	497	}
217		498
218	static void	499	static void
219	downheap (WT *timers, int N, int k)	500	downheap (WT *heap, int N, int k)
220	{	501	{
221	WT w = timers [k];	502	WT w = heap [k];
222		503
223	while (k < (N >> 1))	504	while (k < (N >> 1))
224	{	505	{
225	int j = k << 1;	506	int j = k << 1;
226		507
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	508	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	509	++j;
229		510
230	if (w->at <= timers [j]->at)	511	if (w->at <= heap [j]->at)
231	break;	512	break;
232		513
233	timers [k] = timers [j];	514	heap [k] = heap [j];
234	timers [k]->active = k + 1;	515	((W)heap [k])->active = k + 1;
235	k = j;	516	k = j;
236	}	517	}
237		518
238	timers [k] = w;	519	heap [k] = w;
239	timers [k]->active = k + 1;	520	((W)heap [k])->active = k + 1;
		521	}
		522
		523	inline void
		524	adjustheap (WT *heap, int N, int k, ev_tstamp at)
		525	{
		526	ev_tstamp old_at = heap [k]->at;
		527	heap [k]->at = at;
		528
		529	if (old_at < at)
		530	downheap (heap, N, k);
		531	else
		532	upheap (heap, k);
240	}	533	}
241		534
242	/*****************************************************************************/	535	/*****************************************************************************/
243		536
244	typedef struct	537	typedef struct
245	{	538	{
246	struct ev_signal *head;	539	WL head;
247	sig_atomic_t gotsig;	540	sig_atomic_t volatile gotsig;
248	} ANSIG;	541	} ANSIG;
249		542
250	static ANSIG *signals;	543	static ANSIG *signals;
251	static int signalmax;	544	static int signalmax;
252		545
253	static int sigpipe [2];	546	static int sigpipe [2];
254	static sig_atomic_t gotsig;	547	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	548	static struct ev_io sigev;
256		549
257	static void	550	static void
258	signals_init (ANSIG *base, int count)	551	signals_init (ANSIG *base, int count)
259	{	552	{
260	while (count--)	553	while (count--)
261	{	554	{
262	base->head = 0;	555	base->head = 0;
263	base->gotsig = 0;	556	base->gotsig = 0;
		557
264	++base;	558	++base;
265	}	559	}
266	}	560	}
267		561
268	static void	562	static void
269	sighandler (int signum)	563	sighandler (int signum)
270	{	564	{
		565	#if WIN32
		566	signal (signum, sighandler);
		567	#endif
		568
271	signals [signum - 1].gotsig = 1;	569	signals [signum - 1].gotsig = 1;
272		570
273	if (!gotsig)	571	if (!gotsig)
274	{	572	{
		573	int old_errno = errno;
275	gotsig = 1;	574	gotsig = 1;
		575	#ifdef WIN32
		576	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		577	#else
276	write (sigpipe [1], &gotsig, 1);	578	write (sigpipe [1], &signum, 1);
		579	#endif
		580	errno = old_errno;
277	}	581	}
278	}	582	}
279		583
		584	void
		585	ev_feed_signal_event (EV_P_ int signum)
		586	{
		587	WL w;
		588
		589	#if EV_MULTIPLICITY
		590	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		591	#endif
		592
		593	--signum;
		594
		595	if (signum < 0 || signum >= signalmax)
		596	return;
		597
		598	signals [signum].gotsig = 0;
		599
		600	for (w = signals [signum].head; w; w = w->next)
		601	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		602	}
		603
280	static void	604	static void
281	sigcb (struct ev_io *iow, int revents)	605	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	606	{
283	struct ev_signal *w;
284	int sig;	607	int signum;
285		608
		609	#ifdef WIN32
		610	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		611	#else
		612	read (sigpipe [0], &revents, 1);
		613	#endif
286	gotsig = 0;	614	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		615
289	for (sig = signalmax; sig--; )	616	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	617	if (signals [signum].gotsig)
291	{	618	ev_feed_signal_event (EV_A_ signum + 1);
292	signals [sig].gotsig = 0;
293
294	for (w = signals [sig].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);
296	}
297	}	619	}
298		620
299	static void	621	static void
300	siginit (void)	622	siginit (EV_P)
301	{	623	{
		624	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	625	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	626	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		627
305	/* rather than sort out wether we really need nb, set it */	628	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	629	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	630	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		631	#endif
308		632
309	evio_set (&sigev, sigpipe [0], EV_READ);	633	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	634	ev_io_start (EV_A_ &sigev);
		635	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	636	}
312		637
313	/*****************************************************************************/	638	/*****************************************************************************/
314		639
315	static struct ev_idle **idles;	640	static struct ev_child *childs [PID_HASHSIZE];
316	static int idlemax, idlecnt;
317		641
318	static struct ev_check **checks;	642	#ifndef WIN32
319	static int checkmax, checkcnt;	643
		644	static struct ev_signal childev;
		645
		646	#ifndef WCONTINUED
		647	# define WCONTINUED 0
		648	#endif
		649
		650	static void
		651	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		652	{
		653	struct ev_child *w;
		654
		655	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		656	if (w->pid == pid || !w->pid)
		657	{
		658	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		659	w->rpid = pid;
		660	w->rstatus = status;
		661	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		662	}
		663	}
		664
		665	static void
		666	childcb (EV_P_ struct ev_signal *sw, int revents)
		667	{
		668	int pid, status;
		669
		670	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		671	{
		672	/* make sure we are called again until all childs have been reaped */
		673	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		674
		675	child_reap (EV_A_ sw, pid, pid, status);
		676	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		677	}
		678	}
		679
		680	#endif
320		681
321	/*****************************************************************************/	682	/*****************************************************************************/
322		683
		684	#if EV_USE_KQUEUE
		685	# include "ev_kqueue.c"
		686	#endif
323	#if HAVE_EPOLL	687	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	688	# include "ev_epoll.c"
325	#endif	689	#endif
		690	#if EV_USE_POLL
		691	# include "ev_poll.c"
		692	#endif
326	#if HAVE_SELECT	693	#if EV_USE_SELECT
327	# include "ev_select.c"	694	# include "ev_select.c"
328	#endif	695	#endif
329		696
330	int ev_init (int flags)	697	int
		698	ev_version_major (void)
331	{	699	{
		700	return EV_VERSION_MAJOR;
		701	}
		702
		703	int
		704	ev_version_minor (void)
		705	{
		706	return EV_VERSION_MINOR;
		707	}
		708
		709	/* return true if we are running with elevated privileges and should ignore env variables */
		710	static int
		711	enable_secure (void)
		712	{
		713	#ifdef WIN32
		714	return 0;
		715	#else
		716	return getuid () != geteuid ()
		717	|| getgid () != getegid ();
		718	#endif
		719	}
		720
		721	int
		722	ev_method (EV_P)
		723	{
		724	return method;
		725	}
		726
		727	static void
		728	loop_init (EV_P_ int methods)
		729	{
		730	if (!method)
		731	{
332	#if HAVE_MONOTONIC	732	#if EV_USE_MONOTONIC
333	{	733	{
334	struct timespec ts;	734	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	735	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	736	have_monotonic = 1;
337	}	737	}
338	#endif	738	#endif
339		739
340	ev_now = ev_time ();	740	rt_now = ev_time ();
341	now = get_clock ();	741	mn_now = get_clock ();
342	diff = ev_now - now;	742	now_floor = mn_now;
		743	rtmn_diff = rt_now - mn_now;
343		744
344	if (pipe (sigpipe))	745	if (methods == EVMETHOD_AUTO)
345	return 0;	746	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		747	methods = atoi (getenv ("LIBEV_METHODS"));
		748	else
		749	methods = EVMETHOD_ANY;
346		750
347	ev_method = EVMETHOD_NONE;	751	method = 0;
		752	#if EV_USE_WIN32
		753	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		754	#endif
		755	#if EV_USE_KQUEUE
		756	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		757	#endif
348	#if HAVE_EPOLL	758	#if EV_USE_EPOLL
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	759	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
350	#endif	760	#endif
		761	#if EV_USE_POLL
		762	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		763	#endif
351	#if HAVE_SELECT	764	#if EV_USE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);	765	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
353	#endif	766	#endif
354		767
355	if (ev_method)
356	{
357	evw_init (&sigev, sigcb);	768	ev_init (&sigev, sigcb);
		769	ev_set_priority (&sigev, EV_MAXPRI);
		770	}
		771	}
		772
		773	void
		774	loop_destroy (EV_P)
		775	{
		776	int i;
		777
		778	#if EV_USE_WIN32
		779	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		780	#endif
		781	#if EV_USE_KQUEUE
		782	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		783	#endif
		784	#if EV_USE_EPOLL
		785	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		786	#endif
		787	#if EV_USE_POLL
		788	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		789	#endif
		790	#if EV_USE_SELECT
		791	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		792	#endif
		793
		794	for (i = NUMPRI; i--; )
		795	array_free (pending, [i]);
		796
		797	/* have to use the microsoft-never-gets-it-right macro */
		798	array_free_microshit (fdchange);
		799	array_free_microshit (timer);
		800	array_free_microshit (periodic);
		801	array_free_microshit (idle);
		802	array_free_microshit (prepare);
		803	array_free_microshit (check);
		804
		805	method = 0;
		806	}
		807
		808	static void
		809	loop_fork (EV_P)
		810	{
		811	#if EV_USE_EPOLL
		812	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		813	#endif
		814	#if EV_USE_KQUEUE
		815	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		816	#endif
		817
		818	if (ev_is_active (&sigev))
		819	{
		820	/* default loop */
		821
		822	ev_ref (EV_A);
		823	ev_io_stop (EV_A_ &sigev);
		824	close (sigpipe [0]);
		825	close (sigpipe [1]);
		826
		827	while (pipe (sigpipe))
		828	syserr ("(libev) error creating pipe");
		829
358	siginit ();	830	siginit (EV_A);
		831	}
		832
		833	postfork = 0;
		834	}
		835
		836	#if EV_MULTIPLICITY
		837	struct ev_loop *
		838	ev_loop_new (int methods)
		839	{
		840	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		841
		842	memset (loop, 0, sizeof (struct ev_loop));
		843
		844	loop_init (EV_A_ methods);
		845
		846	if (ev_method (EV_A))
		847	return loop;
		848
		849	return 0;
		850	}
		851
		852	void
		853	ev_loop_destroy (EV_P)
		854	{
		855	loop_destroy (EV_A);
		856	ev_free (loop);
		857	}
		858
		859	void
		860	ev_loop_fork (EV_P)
		861	{
		862	postfork = 1;
		863	}
		864
		865	#endif
		866
		867	#if EV_MULTIPLICITY
		868	struct ev_loop *
		869	#else
		870	int
		871	#endif
		872	ev_default_loop (int methods)
		873	{
		874	if (sigpipe [0] == sigpipe [1])
		875	if (pipe (sigpipe))
		876	return 0;
		877
		878	if (!default_loop)
359	}	879	{
		880	#if EV_MULTIPLICITY
		881	struct ev_loop *loop = default_loop = &default_loop_struct;
		882	#else
		883	default_loop = 1;
		884	#endif
360		885
361	return ev_method;	886	loop_init (EV_A_ methods);
		887
		888	if (ev_method (EV_A))
		889	{
		890	siginit (EV_A);
		891
		892	#ifndef WIN32
		893	ev_signal_init (&childev, childcb, SIGCHLD);
		894	ev_set_priority (&childev, EV_MAXPRI);
		895	ev_signal_start (EV_A_ &childev);
		896	ev_unref (EV_A); /* child watcher should not keep loop alive */
		897	#endif
		898	}
		899	else
		900	default_loop = 0;
		901	}
		902
		903	return default_loop;
		904	}
		905
		906	void
		907	ev_default_destroy (void)
		908	{
		909	#if EV_MULTIPLICITY
		910	struct ev_loop *loop = default_loop;
		911	#endif
		912
		913	#ifndef WIN32
		914	ev_ref (EV_A); /* child watcher */
		915	ev_signal_stop (EV_A_ &childev);
		916	#endif
		917
		918	ev_ref (EV_A); /* signal watcher */
		919	ev_io_stop (EV_A_ &sigev);
		920
		921	close (sigpipe [0]); sigpipe [0] = 0;
		922	close (sigpipe [1]); sigpipe [1] = 0;
		923
		924	loop_destroy (EV_A);
		925	}
		926
		927	void
		928	ev_default_fork (void)
		929	{
		930	#if EV_MULTIPLICITY
		931	struct ev_loop *loop = default_loop;
		932	#endif
		933
		934	if (method)
		935	postfork = 1;
362	}	936	}
363		937
364	/*****************************************************************************/	938	/*****************************************************************************/
365		939
366	void ev_prefork (void)
367	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif
382
383	evio_stop (&sigev);
384	close (sigpipe [0]);
385	close (sigpipe [1]);
386	pipe (sigpipe);
387	siginit ();
388	}
389
390	/*****************************************************************************/
391
392	static void	940	static int
393	fd_reify (void)	941	any_pending (EV_P)
394	{	942	{
395	int i;	943	int pri;
396		944
397	for (i = 0; i < fdchangecnt; ++i)	945	for (pri = NUMPRI; pri--; )
398	{	946	if (pendingcnt [pri])
399	int fd = fdchanges [i];	947	return 1;
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402		948
403	int wev = 0;	949	return 0;
404
405	for (w = anfd->head; w; w = w->next)
406	wev |= w->events;
407
408	if (anfd->wev != wev)
409	{
410	method_modify (fd, anfd->wev, wev);
411	anfd->wev = wev;
412	}
413	}
414
415	fdchangecnt = 0;
416	}	950	}
417		951
418	static void	952	static void
419	call_pending ()	953	call_pending (EV_P)
420	{	954	{
		955	int pri;
		956
		957	for (pri = NUMPRI; pri--; )
421	while (pendingcnt)	958	while (pendingcnt [pri])
422	{	959	{
423	ANPENDING *p = pendings + --pendingcnt;	960	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
424		961
425	if (p->w)	962	if (p->w)
426	{	963	{
427	p->w->pending = 0;	964	p->w->pending = 0;
428	p->w->cb (p->w, p->events);	965	EV_CB_INVOKE (p->w, p->events);
429	}	966	}
430	}	967	}
431	}	968	}
432		969
433	static void	970	static void
434	timers_reify ()	971	timers_reify (EV_P)
435	{	972	{
436	while (timercnt && timers [0]->at <= now)	973	while (timercnt && ((WT)timers [0])->at <= mn_now)
437	{	974	{
438	struct ev_timer *w = timers [0];	975	struct ev_timer *w = timers [0];
439		976
440	event ((W)w, EV_TIMEOUT);	977	assert (("inactive timer on timer heap detected", ev_is_active (w)));
441		978
442	/* first reschedule or stop timer */	979	/* first reschedule or stop timer */
443	if (w->repeat)	980	if (w->repeat)
444	{	981	{
		982	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
445	w->at = now + w->repeat;	983	((WT)w)->at = mn_now + w->repeat;
446	assert (("timer timeout in the past, negative repeat?", w->at > now));
447	downheap ((WT *)timers, timercnt, 0);	984	downheap ((WT *)timers, timercnt, 0);
448	}	985	}
449	else	986	else
450	evtimer_stop (w); /* nonrepeating: stop timer */	987	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
451	}
452	}
453		988
		989	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		990	}
		991	}
		992
454	static void	993	static void
455	periodics_reify ()	994	periodics_reify (EV_P)
456	{	995	{
457	while (periodiccnt && periodics [0]->at <= ev_now)	996	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
458	{	997	{
459	struct ev_periodic *w = periodics [0];	998	struct ev_periodic *w = periodics [0];
460		999
		1000	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		1001
461	/* first reschedule or stop timer */	1002	/* first reschedule or stop timer */
462	if (w->interval)	1003	if (w->reschedule_cb)
463	{	1004	{
		1005	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		1006
		1007	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		1008	downheap ((WT *)periodics, periodiccnt, 0);
		1009	}
		1010	else if (w->interval)
		1011	{
464	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	1012	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
465	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	1013	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
466	downheap ((WT *)periodics, periodiccnt, 0);	1014	downheap ((WT *)periodics, periodiccnt, 0);
467	}	1015	}
468	else	1016	else
469	evperiodic_stop (w); /* nonrepeating: stop timer */	1017	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
470		1018
471	event ((W)w, EV_TIMEOUT);	1019	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
472	}	1020	}
473	}	1021	}
474		1022
475	static void	1023	static void
476	periodics_reschedule (ev_tstamp diff)	1024	periodics_reschedule (EV_P)
477	{	1025	{
478	int i;	1026	int i;
479		1027
480	/* adjust periodics after time jump */	1028	/* adjust periodics after time jump */
481	for (i = 0; i < periodiccnt; ++i)	1029	for (i = 0; i < periodiccnt; ++i)
482	{	1030	{
483	struct ev_periodic *w = periodics [i];	1031	struct ev_periodic *w = periodics [i];
484		1032
		1033	if (w->reschedule_cb)
		1034	((WT)w)->at = w->reschedule_cb (w, rt_now);
485	if (w->interval)	1035	else if (w->interval)
		1036	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1037	}
		1038
		1039	/* now rebuild the heap */
		1040	for (i = periodiccnt >> 1; i--; )
		1041	downheap ((WT *)periodics, periodiccnt, i);
		1042	}
		1043
		1044	inline int
		1045	time_update_monotonic (EV_P)
		1046	{
		1047	mn_now = get_clock ();
		1048
		1049	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1050	{
		1051	rt_now = rtmn_diff + mn_now;
		1052	return 0;
		1053	}
		1054	else
		1055	{
		1056	now_floor = mn_now;
		1057	rt_now = ev_time ();
		1058	return 1;
		1059	}
		1060	}
		1061
		1062	static void
		1063	time_update (EV_P)
		1064	{
		1065	int i;
		1066
		1067	#if EV_USE_MONOTONIC
		1068	if (expect_true (have_monotonic))
		1069	{
		1070	if (time_update_monotonic (EV_A))
486	{	1071	{
487	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1072	ev_tstamp odiff = rtmn_diff;
488		1073
489	if (fabs (diff) >= 1e-4)	1074	for (i = 4; --i; ) /* loop a few times, before making important decisions */
490	{	1075	{
491	evperiodic_stop (w);	1076	rtmn_diff = rt_now - mn_now;
492	evperiodic_start (w);
493		1077
494	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1078	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1079	return; /* all is well */
		1080
		1081	rt_now = ev_time ();
		1082	mn_now = get_clock ();
		1083	now_floor = mn_now;
495	}	1084	}
		1085
		1086	periodics_reschedule (EV_A);
		1087	/* no timer adjustment, as the monotonic clock doesn't jump */
		1088	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
496	}	1089	}
497	}	1090	}
498	}	1091	else
499		1092	#endif
500	static void	1093	{
501	time_update ()
502	{
503	int i;
504
505	ev_now = ev_time ();	1094	rt_now = ev_time ();
506		1095
507	if (have_monotonic)	1096	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
508	{
509	ev_tstamp odiff = diff;
510
511	for (i = 4; --i; ) /* loop a few times, before making important decisions */
512	{	1097	{
513	now = get_clock ();
514	diff = ev_now - now;
515
516	if (fabs (odiff - diff) < MIN_TIMEJUMP)
517	return; /* all is well */
518
519	ev_now = ev_time ();
520	}
521
522	periodics_reschedule (diff - odiff);
523	/* no timer adjustment, as the monotonic clock doesn't jump */
524	}
525	else
526	{
527	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
528	{
529	periodics_reschedule (ev_now - now);	1098	periodics_reschedule (EV_A);
530		1099
531	/* adjust timers. this is easy, as the offset is the same for all */	1100	/* adjust timers. this is easy, as the offset is the same for all */
532	for (i = 0; i < timercnt; ++i)	1101	for (i = 0; i < timercnt; ++i)
533	timers [i]->at += diff;	1102	((WT)timers [i])->at += rt_now - mn_now;
534	}	1103	}
535		1104
536	now = ev_now;	1105	mn_now = rt_now;
537	}	1106	}
538	}	1107	}
539		1108
540	int ev_loop_done;	1109	void
		1110	ev_ref (EV_P)
		1111	{
		1112	++activecnt;
		1113	}
541		1114
		1115	void
		1116	ev_unref (EV_P)
		1117	{
		1118	--activecnt;
		1119	}
		1120
		1121	static int loop_done;
		1122
		1123	void
542	void ev_loop (int flags)	1124	ev_loop (EV_P_ int flags)
543	{	1125	{
544	double block;	1126	double block;
545	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1127	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
546
547	if (checkcnt)
548	{
549	queue_events ((W *)checks, checkcnt, EV_CHECK);
550	call_pending ();
551	}
552		1128
553	do	1129	do
554	{	1130	{
		1131	/* queue check watchers (and execute them) */
		1132	if (expect_false (preparecnt))
		1133	{
		1134	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1135	call_pending (EV_A);
		1136	}
		1137
		1138	/* we might have forked, so reify kernel state if necessary */
		1139	if (expect_false (postfork))
		1140	loop_fork (EV_A);
		1141
555	/* update fd-related kernel structures */	1142	/* update fd-related kernel structures */
556	fd_reify ();	1143	fd_reify (EV_A);
557		1144
558	/* calculate blocking time */	1145	/* calculate blocking time */
559		1146
560	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1147	/* we only need this for !monotonic clock or timers, but as we basically
		1148	always have timers, we just calculate it always */
		1149	#if EV_USE_MONOTONIC
		1150	if (expect_true (have_monotonic))
		1151	time_update_monotonic (EV_A);
		1152	else
		1153	#endif
		1154	{
561	ev_now = ev_time ();	1155	rt_now = ev_time ();
		1156	mn_now = rt_now;
		1157	}
562		1158
563	if (flags & EVLOOP_NONBLOCK || idlecnt)	1159	if (flags & EVLOOP_NONBLOCK || idlecnt)
564	block = 0.;	1160	block = 0.;
565	else	1161	else
566	{	1162	{
567	block = MAX_BLOCKTIME;	1163	block = MAX_BLOCKTIME;
568		1164
569	if (timercnt)	1165	if (timercnt)
570	{	1166	{
571	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1167	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
572	if (block > to) block = to;	1168	if (block > to) block = to;
573	}	1169	}
574		1170
575	if (periodiccnt)	1171	if (periodiccnt)
576	{	1172	{
577	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1173	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
578	if (block > to) block = to;	1174	if (block > to) block = to;
579	}	1175	}
580		1176
581	if (block < 0.) block = 0.;	1177	if (block < 0.) block = 0.;
582	}	1178	}
583		1179
584	method_poll (block);	1180	method_poll (EV_A_ block);
585		1181
586	/* update ev_now, do magic */	1182	/* update rt_now, do magic */
587	time_update ();	1183	time_update (EV_A);
588		1184
589	/* queue pending timers and reschedule them */	1185	/* queue pending timers and reschedule them */
		1186	timers_reify (EV_A); /* relative timers called last */
590	periodics_reify (); /* absolute timers first */	1187	periodics_reify (EV_A); /* absolute timers called first */
591	timers_reify (); /* relative timers second */
592		1188
593	/* queue idle watchers unless io or timers are pending */	1189	/* queue idle watchers unless io or timers are pending */
594	if (!pendingcnt)	1190	if (idlecnt && !any_pending (EV_A))
595	queue_events ((W *)idles, idlecnt, EV_IDLE);	1191	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
596		1192
597	/* queue check and possibly idle watchers */	1193	/* queue check watchers, to be executed first */
		1194	if (checkcnt)
598	queue_events ((W *)checks, checkcnt, EV_CHECK);	1195	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
599		1196
600	call_pending ();	1197	call_pending (EV_A);
601	}	1198	}
602	while (!ev_loop_done);	1199	while (activecnt && !loop_done);
603		1200
604	if (ev_loop_done != 2)	1201	if (loop_done != 2)
605	ev_loop_done = 0;	1202	loop_done = 0;
		1203	}
		1204
		1205	void
		1206	ev_unloop (EV_P_ int how)
		1207	{
		1208	loop_done = how;
606	}	1209	}
607		1210
608	/*****************************************************************************/	1211	/*****************************************************************************/
609		1212
610	static void	1213	inline void
611	wlist_add (WL *head, WL elem)	1214	wlist_add (WL *head, WL elem)
612	{	1215	{
613	elem->next = *head;	1216	elem->next = *head;
614	*head = elem;	1217	*head = elem;
615	}	1218	}
616		1219
617	static void	1220	inline void
618	wlist_del (WL *head, WL elem)	1221	wlist_del (WL *head, WL elem)
619	{	1222	{
620	while (*head)	1223	while (*head)
621	{	1224	{
622	if (*head == elem)	1225	if (*head == elem)
…		…
627		1230
628	head = &(*head)->next;	1231	head = &(*head)->next;
629	}	1232	}
630	}	1233	}
631		1234
632	static void	1235	inline void
633	ev_clear (W w)	1236	ev_clear_pending (EV_P_ W w)
634	{	1237	{
635	if (w->pending)	1238	if (w->pending)
636	{	1239	{
637	pendings [w->pending - 1].w = 0;	1240	pendings [ABSPRI (w)][w->pending - 1].w = 0;
638	w->pending = 0;	1241	w->pending = 0;
639	}	1242	}
640	}	1243	}
641		1244
642	static void	1245	inline void
643	ev_start (W w, int active)	1246	ev_start (EV_P_ W w, int active)
644	{	1247	{
		1248	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1249	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1250
645	w->active = active;	1251	w->active = active;
		1252	ev_ref (EV_A);
646	}	1253	}
647		1254
648	static void	1255	inline void
649	ev_stop (W w)	1256	ev_stop (EV_P_ W w)
650	{	1257	{
		1258	ev_unref (EV_A);
651	w->active = 0;	1259	w->active = 0;
652	}	1260	}
653		1261
654	/*****************************************************************************/	1262	/*****************************************************************************/
655		1263
656	void	1264	void
657	evio_start (struct ev_io *w)	1265	ev_io_start (EV_P_ struct ev_io *w)
658	{	1266	{
		1267	int fd = w->fd;
		1268
659	if (ev_is_active (w))	1269	if (ev_is_active (w))
660	return;	1270	return;
661		1271
662	int fd = w->fd;	1272	assert (("ev_io_start called with negative fd", fd >= 0));
663		1273
664	ev_start ((W)w, 1);	1274	ev_start (EV_A_ (W)w, 1);
665	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1275	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
666	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1276	wlist_add ((WL *)&anfds[fd].head, (WL)w);
667		1277
668	++fdchangecnt;	1278	fd_change (EV_A_ fd);
669	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
670	fdchanges [fdchangecnt - 1] = fd;
671	}	1279	}
672		1280
673	void	1281	void
674	evio_stop (struct ev_io *w)	1282	ev_io_stop (EV_P_ struct ev_io *w)
675	{	1283	{
676	ev_clear ((W)w);	1284	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1285	if (!ev_is_active (w))
678	return;	1286	return;
679		1287
680	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1288	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
681	ev_stop ((W)w);	1289	ev_stop (EV_A_ (W)w);
682		1290
683	++fdchangecnt;	1291	fd_change (EV_A_ w->fd);
684	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
685	fdchanges [fdchangecnt - 1] = w->fd;
686	}	1292	}
687		1293
688	void	1294	void
689	evtimer_start (struct ev_timer *w)	1295	ev_timer_start (EV_P_ struct ev_timer *w)
690	{	1296	{
691	if (ev_is_active (w))	1297	if (ev_is_active (w))
692	return;	1298	return;
693		1299
694	w->at += now;	1300	((WT)w)->at += mn_now;
695		1301
696	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1302	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
697		1303
698	ev_start ((W)w, ++timercnt);	1304	ev_start (EV_A_ (W)w, ++timercnt);
699	array_needsize (timers, timermax, timercnt, );	1305	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
700	timers [timercnt - 1] = w;	1306	timers [timercnt - 1] = w;
701	upheap ((WT *)timers, timercnt - 1);	1307	upheap ((WT *)timers, timercnt - 1);
702	}
703		1308
		1309	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1310	}
		1311
704	void	1312	void
705	evtimer_stop (struct ev_timer *w)	1313	ev_timer_stop (EV_P_ struct ev_timer *w)
706	{	1314	{
707	ev_clear ((W)w);	1315	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1316	if (!ev_is_active (w))
709	return;	1317	return;
710		1318
		1319	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1320
711	if (w->active < timercnt--)	1321	if (((W)w)->active < timercnt--)
712	{	1322	{
713	timers [w->active - 1] = timers [timercnt];	1323	timers [((W)w)->active - 1] = timers [timercnt];
714	downheap ((WT *)timers, timercnt, w->active - 1);	1324	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
715	}	1325	}
716		1326
717	w->at = w->repeat;	1327	((WT)w)->at = w->repeat;
718		1328
719	ev_stop ((W)w);	1329	ev_stop (EV_A_ (W)w);
720	}	1330	}
721		1331
722	void	1332	void
723	evtimer_again (struct ev_timer *w)	1333	ev_timer_again (EV_P_ struct ev_timer *w)
724	{	1334	{
725	if (ev_is_active (w))	1335	if (ev_is_active (w))
726	{	1336	{
727	if (w->repeat)	1337	if (w->repeat)
728	{
729	w->at = now + w->repeat;
730	downheap ((WT *)timers, timercnt, w->active - 1);	1338	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1, mn_now + w->repeat);
731	}
732	else	1339	else
733	evtimer_stop (w);	1340	ev_timer_stop (EV_A_ w);
734	}	1341	}
735	else if (w->repeat)	1342	else if (w->repeat)
736	evtimer_start (w);	1343	ev_timer_start (EV_A_ w);
737	}	1344	}
738		1345
739	void	1346	void
740	evperiodic_start (struct ev_periodic *w)	1347	ev_periodic_start (EV_P_ struct ev_periodic *w)
741	{	1348	{
742	if (ev_is_active (w))	1349	if (ev_is_active (w))
743	return;	1350	return;
744		1351
745	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1352	if (w->reschedule_cb)
746		1353	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1354	else if (w->interval)
		1355	{
		1356	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
747	/* this formula differs from the one in periodic_reify because we do not always round up */	1357	/* this formula differs from the one in periodic_reify because we do not always round up */
748	if (w->interval)
749	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1358	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1359	}
750		1360
751	ev_start ((W)w, ++periodiccnt);	1361	ev_start (EV_A_ (W)w, ++periodiccnt);
752	array_needsize (periodics, periodicmax, periodiccnt, );	1362	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
753	periodics [periodiccnt - 1] = w;	1363	periodics [periodiccnt - 1] = w;
754	upheap ((WT *)periodics, periodiccnt - 1);	1364	upheap ((WT *)periodics, periodiccnt - 1);
755	}
756		1365
		1366	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1367	}
		1368
757	void	1369	void
758	evperiodic_stop (struct ev_periodic *w)	1370	ev_periodic_stop (EV_P_ struct ev_periodic *w)
759	{	1371	{
760	ev_clear ((W)w);	1372	ev_clear_pending (EV_A_ (W)w);
761	if (!ev_is_active (w))	1373	if (!ev_is_active (w))
762	return;	1374	return;
763		1375
		1376	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1377
764	if (w->active < periodiccnt--)	1378	if (((W)w)->active < periodiccnt--)
765	{	1379	{
766	periodics [w->active - 1] = periodics [periodiccnt];	1380	periodics [((W)w)->active - 1] = periodics [periodiccnt];
767	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1381	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
768	}	1382	}
769		1383
770	ev_stop ((W)w);	1384	ev_stop (EV_A_ (W)w);
771	}	1385	}
772		1386
773	void	1387	void
774	evsignal_start (struct ev_signal *w)	1388	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1389	{
		1390	/* TODO: use adjustheap and recalculation */
		1391	ev_periodic_stop (EV_A_ w);
		1392	ev_periodic_start (EV_A_ w);
		1393	}
		1394
		1395	void
		1396	ev_idle_start (EV_P_ struct ev_idle *w)
775	{	1397	{
776	if (ev_is_active (w))	1398	if (ev_is_active (w))
777	return;	1399	return;
778		1400
		1401	ev_start (EV_A_ (W)w, ++idlecnt);
		1402	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1403	idles [idlecnt - 1] = w;
		1404	}
		1405
		1406	void
		1407	ev_idle_stop (EV_P_ struct ev_idle *w)
		1408	{
		1409	ev_clear_pending (EV_A_ (W)w);
		1410	if (ev_is_active (w))
		1411	return;
		1412
		1413	idles [((W)w)->active - 1] = idles [--idlecnt];
		1414	ev_stop (EV_A_ (W)w);
		1415	}
		1416
		1417	void
		1418	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1419	{
		1420	if (ev_is_active (w))
		1421	return;
		1422
		1423	ev_start (EV_A_ (W)w, ++preparecnt);
		1424	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1425	prepares [preparecnt - 1] = w;
		1426	}
		1427
		1428	void
		1429	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1430	{
		1431	ev_clear_pending (EV_A_ (W)w);
		1432	if (ev_is_active (w))
		1433	return;
		1434
		1435	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1436	ev_stop (EV_A_ (W)w);
		1437	}
		1438
		1439	void
		1440	ev_check_start (EV_P_ struct ev_check *w)
		1441	{
		1442	if (ev_is_active (w))
		1443	return;
		1444
		1445	ev_start (EV_A_ (W)w, ++checkcnt);
		1446	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1447	checks [checkcnt - 1] = w;
		1448	}
		1449
		1450	void
		1451	ev_check_stop (EV_P_ struct ev_check *w)
		1452	{
		1453	ev_clear_pending (EV_A_ (W)w);
		1454	if (ev_is_active (w))
		1455	return;
		1456
		1457	checks [((W)w)->active - 1] = checks [--checkcnt];
		1458	ev_stop (EV_A_ (W)w);
		1459	}
		1460
		1461	#ifndef SA_RESTART
		1462	# define SA_RESTART 0
		1463	#endif
		1464
		1465	void
		1466	ev_signal_start (EV_P_ struct ev_signal *w)
		1467	{
		1468	#if EV_MULTIPLICITY
		1469	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1470	#endif
		1471	if (ev_is_active (w))
		1472	return;
		1473
		1474	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1475
779	ev_start ((W)w, 1);	1476	ev_start (EV_A_ (W)w, 1);
780	array_needsize (signals, signalmax, w->signum, signals_init);	1477	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
781	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1478	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
782		1479
783	if (!w->next)	1480	if (!((WL)w)->next)
784	{	1481	{
		1482	#if WIN32
		1483	signal (w->signum, sighandler);
		1484	#else
785	struct sigaction sa;	1485	struct sigaction sa;
786	sa.sa_handler = sighandler;	1486	sa.sa_handler = sighandler;
787	sigfillset (&sa.sa_mask);	1487	sigfillset (&sa.sa_mask);
788	sa.sa_flags = 0;	1488	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
789	sigaction (w->signum, &sa, 0);	1489	sigaction (w->signum, &sa, 0);
		1490	#endif
790	}	1491	}
791	}	1492	}
792		1493
793	void	1494	void
794	evsignal_stop (struct ev_signal *w)	1495	ev_signal_stop (EV_P_ struct ev_signal *w)
795	{	1496	{
796	ev_clear ((W)w);	1497	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1498	if (!ev_is_active (w))
798	return;	1499	return;
799		1500
800	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1501	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
801	ev_stop ((W)w);	1502	ev_stop (EV_A_ (W)w);
802		1503
803	if (!signals [w->signum - 1].head)	1504	if (!signals [w->signum - 1].head)
804	signal (w->signum, SIG_DFL);	1505	signal (w->signum, SIG_DFL);
805	}	1506	}
806		1507
807	void evidle_start (struct ev_idle *w)	1508	void
		1509	ev_child_start (EV_P_ struct ev_child *w)
808	{	1510	{
		1511	#if EV_MULTIPLICITY
		1512	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1513	#endif
809	if (ev_is_active (w))	1514	if (ev_is_active (w))
810	return;	1515	return;
811		1516
812	ev_start ((W)w, ++idlecnt);	1517	ev_start (EV_A_ (W)w, 1);
813	array_needsize (idles, idlemax, idlecnt, );	1518	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
814	idles [idlecnt - 1] = w;
815	}	1519	}
816		1520
817	void evidle_stop (struct ev_idle *w)	1521	void
		1522	ev_child_stop (EV_P_ struct ev_child *w)
818	{	1523	{
819	ev_clear ((W)w);	1524	ev_clear_pending (EV_A_ (W)w);
820	if (ev_is_active (w))	1525	if (ev_is_active (w))
821	return;	1526	return;
822		1527
823	idles [w->active - 1] = idles [--idlecnt];	1528	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
824	ev_stop ((W)w);	1529	ev_stop (EV_A_ (W)w);
825	}
826
827	void evcheck_start (struct ev_check *w)
828	{
829	if (ev_is_active (w))
830	return;
831
832	ev_start ((W)w, ++checkcnt);
833	array_needsize (checks, checkmax, checkcnt, );
834	checks [checkcnt - 1] = w;
835	}
836
837	void evcheck_stop (struct ev_check *w)
838	{
839	ev_clear ((W)w);
840	if (ev_is_active (w))
841	return;
842
843	checks [w->active - 1] = checks [--checkcnt];
844	ev_stop ((W)w);
845	}	1530	}
846		1531
847	/*****************************************************************************/	1532	/*****************************************************************************/
848		1533
849	struct ev_once	1534	struct ev_once
…		…
853	void (*cb)(int revents, void *arg);	1538	void (*cb)(int revents, void *arg);
854	void *arg;	1539	void *arg;
855	};	1540	};
856		1541
857	static void	1542	static void
858	once_cb (struct ev_once *once, int revents)	1543	once_cb (EV_P_ struct ev_once *once, int revents)
859	{	1544	{
860	void (*cb)(int revents, void *arg) = once->cb;	1545	void (*cb)(int revents, void *arg) = once->cb;
861	void *arg = once->arg;	1546	void *arg = once->arg;
862		1547
863	evio_stop (&once->io);	1548	ev_io_stop (EV_A_ &once->io);
864	evtimer_stop (&once->to);	1549	ev_timer_stop (EV_A_ &once->to);
865	free (once);	1550	ev_free (once);
866		1551
867	cb (revents, arg);	1552	cb (revents, arg);
868	}	1553	}
869		1554
870	static void	1555	static void
871	once_cb_io (struct ev_io *w, int revents)	1556	once_cb_io (EV_P_ struct ev_io *w, int revents)
872	{	1557	{
873	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1558	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
874	}	1559	}
875		1560
876	static void	1561	static void
877	once_cb_to (struct ev_timer *w, int revents)	1562	once_cb_to (EV_P_ struct ev_timer *w, int revents)
878	{	1563	{
879	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1564	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
880	}	1565	}
881		1566
882	void	1567	void
883	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1568	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
884	{	1569	{
885	struct ev_once *once = malloc (sizeof (struct ev_once));	1570	struct ev_once *once = (struct ev_once *)ev_malloc (sizeof (struct ev_once));
886		1571
887	if (!once)	1572	if (!once)
888	cb (EV_ERROR, arg);	1573	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
889	else	1574	else
890	{	1575	{
891	once->cb = cb;	1576	once->cb = cb;
892	once->arg = arg;	1577	once->arg = arg;
893		1578
894	evw_init (&once->io, once_cb_io);	1579	ev_init (&once->io, once_cb_io);
895
896	if (fd >= 0)	1580	if (fd >= 0)
897	{	1581	{
898	evio_set (&once->io, fd, events);	1582	ev_io_set (&once->io, fd, events);
899	evio_start (&once->io);	1583	ev_io_start (EV_A_ &once->io);
900	}	1584	}
901		1585
902	evw_init (&once->to, once_cb_to);	1586	ev_init (&once->to, once_cb_to);
903
904	if (timeout >= 0.)	1587	if (timeout >= 0.)
905	{	1588	{
906	evtimer_set (&once->to, timeout, 0.);	1589	ev_timer_set (&once->to, timeout, 0.);
907	evtimer_start (&once->to);	1590	ev_timer_start (EV_A_ &once->to);
908	}	1591	}
909	}	1592	}
910	}	1593	}
911		1594
912	/*****************************************************************************/
913
914	#if 0
915
916	struct ev_io wio;
917
918	static void
919	sin_cb (struct ev_io *w, int revents)
920	{
921	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
922	}
923
924	static void
925	ocb (struct ev_timer *w, int revents)
926	{
927	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
928	evtimer_stop (w);
929	evtimer_start (w);
930	}
931
932	static void
933	scb (struct ev_signal *w, int revents)
934	{
935	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
936	evio_stop (&wio);
937	evio_start (&wio);
938	}
939
940	static void
941	gcb (struct ev_signal *w, int revents)
942	{
943	fprintf (stderr, "generic %x\n", revents);
944
945	}
946
947	int main (void)
948	{
949	ev_init (0);
950
951	evio_init (&wio, sin_cb, 0, EV_READ);
952	evio_start (&wio);
953
954	struct ev_timer t[10000];
955
956	#if 0
957	int i;
958	for (i = 0; i < 10000; ++i)
959	{
960	struct ev_timer *w = t + i;
961	evw_init (w, ocb, i);
962	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
963	evtimer_start (w);
964	if (drand48 () < 0.5)
965	evtimer_stop (w);
966	}
967	#endif
968
969	struct ev_timer t1;
970	evtimer_init (&t1, ocb, 5, 10);
971	evtimer_start (&t1);
972
973	struct ev_signal sig;
974	evsignal_init (&sig, scb, SIGQUIT);
975	evsignal_start (&sig);
976
977	struct ev_check cw;
978	evcheck_init (&cw, gcb);
979	evcheck_start (&cw);
980
981	struct ev_idle iw;
982	evidle_init (&iw, gcb);
983	evidle_start (&iw);
984
985	ev_loop (0);
986
987	return 0;
988	}
989
990	#endif
991
992
993
994

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