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

Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 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
		69	#include <signal.h>
		70
		71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
		74	# include <sys/wait.h>
		75	#endif
		76	/**/
		77
44	#ifndef HAVE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
45	# ifdef CLOCK_MONOTONIC
46	# 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
47	# endif	105	# endif
48	#endif	106	#endif
49		107
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	108	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	109	# define EV_USE_REALTIME 1
60	#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	/**/
61		125
62	#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) */
63	#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 */
64		130
65	#include "ev.h"	131	#include "ev.h"
		132
		133	#if __GNUC__ >= 3
		134	# define expect(expr,value) __builtin_expect ((expr),(value))
		135	# define inline inline
		136	#else
		137	# define expect(expr,value) (expr)
		138	# define inline static
		139	#endif
		140
		141	#define expect_false(expr) expect ((expr) != 0, 0)
		142	#define expect_true(expr) expect ((expr) != 0, 1)
		143
		144	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		145	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
66		146
67	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
70		150
71	static ev_tstamp now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74		152
75	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		154
81	/*****************************************************************************/	155	/*****************************************************************************/
82		156
83	ev_tstamp	157	static void (syserr_cb)(const char msg);
		158
		159	void ev_set_syserr_cb (void (cb)(const char msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void (alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void (cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
		224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
84	ev_time (void)	239	ev_time (void)
85	{	240	{
86	#if HAVE_REALTIME	241	#if EV_USE_REALTIME
87	struct timespec ts;	242	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	244	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	245	#else
91	struct timeval tv;	246	struct timeval tv;
92	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	249	#endif
95	}	250	}
96		251
97	static ev_tstamp	252	inline ev_tstamp
98	get_clock (void)	253	get_clock (void)
99	{	254	{
100	#if HAVE_MONOTONIC	255	#if EV_USE_MONOTONIC
101	if (have_monotonic)	256	if (expect_true (have_monotonic))
102	{	257	{
103	struct timespec ts;	258	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	259	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	260	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	261	}
107	#endif	262	#endif
108		263
109	return ev_time ();	264	return ev_time ();
110	}	265	}
111		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
		273	#define array_roundsize(type,n) ((n) \| 4 & ~3)
		274
112	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
113	if ((cnt) > cur) \	276	if (expect_false ((cnt) > cur)) \
114	{ \	277	{ \
115	int newcnt = cur ? cur << 1 : 16; \	278	int newcnt = cur; \
		279	do \
		280	{ \
		281	newcnt = array_roundsize (type, newcnt << 1); \
		282	} \
		283	while ((cnt) > newcnt); \
		284	\
116	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
117	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	287	cur = newcnt; \
119	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
120		305
121	/*****************************************************************************/	306	/*****************************************************************************/
122		307
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	308	static void
136	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
137	{	310	{
138	while (count--)	311	while (count--)
139	{	312	{
140	base->head = 0;	313	base->head = 0;
141	base->wev = base->rev = EV_NONE;	314	base->events = EV_NONE;
		315	base->reify = 0;
		316
142	++base;	317	++base;
143	}	318	}
144	}	319	}
145		320
146	typedef struct	321	void
		322	ev_feed_event (EV_P_ void *w, int revents)
147	{	323	{
148	W w;	324	W w_ = (W)w;
149	int events;
150	} ANPENDING;
151		325
152	static ANPENDING *pendings;	326	if (w_->pending)
153	static int pendingmax, pendingcnt;
154
155	static void
156	event (W w, int events)
157	{
158	if (w->active)
159	{	327	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	328	pendings [ABSPRI (w_)][w_->pending - 1].events \|= revents;
		329	return;
164	}	330	}
165	}
166		331
		332	w_->pending = ++pendingcnt [ABSPRI (w_)];
		333	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], (void));
		334	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
		335	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
		336	}
		337
167	static void	338	static void
		339	queue_events (EV_P_ W *events, int eventcnt, int type)
		340	{
		341	int i;
		342
		343	for (i = 0; i < eventcnt; ++i)
		344	ev_feed_event (EV_A_ events [i], type);
		345	}
		346
		347	inline void
168	fd_event (int fd, int events)	348	fd_event (EV_P_ int fd, int revents)
169	{	349	{
170	ANFD *anfd = anfds + fd;	350	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	351	struct ev_io *w;
172		352
173	for (w = anfd->head; w; w = w->next)	353	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	354	{
175	int ev = w->events & events;	355	int ev = w->events & revents;
176		356
177	if (ev)	357	if (ev)
178	event ((W)w, ev);	358	ev_feed_event (EV_A_ (W)w, ev);
179	}	359	}
180	}	360	}
181		361
		362	void
		363	ev_feed_fd_event (EV_P_ int fd, int revents)
		364	{
		365	fd_event (EV_A_ fd, revents);
		366	}
		367
		368	/*****************************************************************************/
		369
182	static void	370	static void
183	queue_events (W *events, int eventcnt, int type)	371	fd_reify (EV_P)
184	{	372	{
185	int i;	373	int i;
186		374
187	for (i = 0; i < eventcnt; ++i)	375	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	376	{
		377	int fd = fdchanges [i];
		378	ANFD *anfd = anfds + fd;
		379	struct ev_io *w;
		380
		381	int events = 0;
		382
		383	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		384	events \|= w->events;
		385
		386	anfd->reify = 0;
		387
		388	method_modify (EV_A_ fd, anfd->events, events);
		389	anfd->events = events;
		390	}
		391
		392	fdchangecnt = 0;
		393	}
		394
		395	static void
		396	fd_change (EV_P_ int fd)
		397	{
		398	if (anfds [fd].reify)
		399	return;
		400
		401	anfds [fd].reify = 1;
		402
		403	++fdchangecnt;
		404	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		405	fdchanges [fdchangecnt - 1] = fd;
		406	}
		407
		408	static void
		409	fd_kill (EV_P_ int fd)
		410	{
		411	struct ev_io *w;
		412
		413	while ((w = (struct ev_io *)anfds [fd].head))
		414	{
		415	ev_io_stop (EV_A_ w);
		416	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		417	}
		418	}
		419
		420	static int
		421	fd_valid (int fd)
		422	{
		423	#ifdef WIN32
		424	return !!win32_get_osfhandle (fd);
		425	#else
		426	return fcntl (fd, F_GETFD) != -1;
		427	#endif
189	}	428	}
190		429
191	/* called on EBADF to verify fds */	430	/* called on EBADF to verify fds */
192	static void	431	static void
193	fd_recheck ()	432	fd_ebadf (EV_P)
194	{	433	{
195	int fd;	434	int fd;
196		435
197	for (fd = 0; fd < anfdmax; ++fd)	436	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	437	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	438	if (!fd_valid (fd) == -1 && errno == EBADF)
200	while (anfds [fd].head)	439	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	440	}
		441
		442	/* called on ENOMEM in select/poll to kill some fds and retry */
		443	static void
		444	fd_enomem (EV_P)
		445	{
		446	int fd;
		447
		448	for (fd = anfdmax; fd--; )
		449	if (anfds [fd].events)
		450	{
		451	fd_kill (EV_A_ fd);
		452	return;
		453	}
		454	}
		455
		456	/* usually called after fork if method needs to re-arm all fds from scratch */
		457	static void
		458	fd_rearm_all (EV_P)
		459	{
		460	int fd;
		461
		462	/* this should be highly optimised to not do anything but set a flag */
		463	for (fd = 0; fd < anfdmax; ++fd)
		464	if (anfds [fd].events)
		465	{
		466	anfds [fd].events = 0;
		467	fd_change (EV_A_ fd);
		468	}
202	}	469	}
203		470
204	/*****************************************************************************/	471	/*****************************************************************************/
205		472
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	473	static void
213	upheap (WT *timers, int k)	474	upheap (WT *heap, int k)
214	{	475	{
215	WT w = timers [k];	476	WT w = heap [k];
216		477
217	while (k && timers [k >> 1]->at > w->at)	478	while (k && heap [k >> 1]->at > w->at)
218	{	479	{
219	timers [k] = timers [k >> 1];	480	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	481	((W)heap [k])->active = k + 1;
221	k >>= 1;	482	k >>= 1;
222	}	483	}
223		484
224	timers [k] = w;	485	heap [k] = w;
225	timers [k]->active = k + 1;	486	((W)heap [k])->active = k + 1;
226		487
227	}	488	}
228		489
229	static void	490	static void
230	downheap (WT *timers, int N, int k)	491	downheap (WT *heap, int N, int k)
231	{	492	{
232	WT w = timers [k];	493	WT w = heap [k];
233		494
234	while (k < (N >> 1))	495	while (k < (N >> 1))
235	{	496	{
236	int j = k << 1;	497	int j = k << 1;
237		498
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	499	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	500	++j;
240		501
241	if (w->at <= timers [j]->at)	502	if (w->at <= heap [j]->at)
242	break;	503	break;
243		504
244	timers [k] = timers [j];	505	heap [k] = heap [j];
245	timers [k]->active = k + 1;	506	((W)heap [k])->active = k + 1;
246	k = j;	507	k = j;
247	}	508	}
248		509
249	timers [k] = w;	510	heap [k] = w;
250	timers [k]->active = k + 1;	511	((W)heap [k])->active = k + 1;
251	}	512	}
252		513
253	/*****************************************************************************/	514	/*****************************************************************************/
254		515
255	typedef struct	516	typedef struct
256	{	517	{
257	struct ev_signal *head;	518	WL head;
258	sig_atomic_t gotsig;	519	sig_atomic_t volatile gotsig;
259	} ANSIG;	520	} ANSIG;
260		521
261	static ANSIG *signals;	522	static ANSIG *signals;
262	static int signalmax;	523	static int signalmax;
263		524
264	static int sigpipe [2];	525	static int sigpipe [2];
265	static sig_atomic_t gotsig;	526	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	527	static struct ev_io sigev;
267		528
268	static void	529	static void
269	signals_init (ANSIG *base, int count)	530	signals_init (ANSIG *base, int count)
270	{	531	{
271	while (count--)	532	while (count--)
272	{	533	{
273	base->head = 0;	534	base->head = 0;
274	base->gotsig = 0;	535	base->gotsig = 0;
		536
275	++base;	537	++base;
276	}	538	}
277	}	539	}
278		540
279	static void	541	static void
280	sighandler (int signum)	542	sighandler (int signum)
281	{	543	{
		544	#if WIN32
		545	signal (signum, sighandler);
		546	#endif
		547
282	signals [signum - 1].gotsig = 1;	548	signals [signum - 1].gotsig = 1;
283		549
284	if (!gotsig)	550	if (!gotsig)
285	{	551	{
		552	int old_errno = errno;
286	gotsig = 1;	553	gotsig = 1;
		554	#ifdef WIN32
		555	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		556	#else
287	write (sigpipe [1], &gotsig, 1);	557	write (sigpipe [1], &signum, 1);
		558	#endif
		559	errno = old_errno;
288	}	560	}
289	}	561	}
290		562
		563	void
		564	ev_feed_signal_event (EV_P_ int signum)
		565	{
		566	#if EV_MULTIPLICITY
		567	assert (("feeding signal events is only supported in the default loop", loop == default_loop));
		568	#endif
		569
		570	--signum;
		571
		572	if (signum < 0 \|\| signum >= signalmax)
		573	return;
		574
		575	signals [signum].gotsig = 0;
		576
		577	for (w = signals [signum].head; w; w = w->next)
		578	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		579	}
		580
291	static void	581	static void
292	sigcb (struct ev_io *iow, int revents)	582	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	583	{
294	struct ev_signal *w;	584	WL w;
295	int sig;	585	int signum;
296		586
		587	#ifdef WIN32
		588	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		589	#else
		590	read (sigpipe [0], &revents, 1);
		591	#endif
297	gotsig = 0;	592	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		593
300	for (sig = signalmax; sig--; )	594	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	595	if (signals [signum].gotsig)
302	{	596	sigevent (EV_A_ signum + 1);
303	signals [sig].gotsig = 0;
304
305	for (w = signals [sig].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);
307	}
308	}	597	}
309		598
310	static void	599	static void
311	siginit (void)	600	siginit (EV_P)
312	{	601	{
		602	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	603	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	604	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		605
316	/* rather than sort out wether we really need nb, set it */	606	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	607	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	608	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		609	#endif
319		610
320	evio_set (&sigev, sigpipe [0], EV_READ);	611	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	612	ev_io_start (EV_A_ &sigev);
		613	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	614	}
323		615
324	/*****************************************************************************/	616	/*****************************************************************************/
325		617
326	static struct ev_idle **idles;	618	static struct ev_child *childs [PID_HASHSIZE];
327	static int idlemax, idlecnt;
328		619
329	static struct ev_check **checks;	620	#ifndef WIN32
330	static int checkmax, checkcnt;	621
		622	static struct ev_signal childev;
		623
		624	#ifndef WCONTINUED
		625	# define WCONTINUED 0
		626	#endif
		627
		628	static void
		629	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		630	{
		631	struct ev_child *w;
		632
		633	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		634	if (w->pid == pid \|\| !w->pid)
		635	{
		636	ev_priority (w) = ev_priority (sw); /* need to do it now */
		637	w->rpid = pid;
		638	w->rstatus = status;
		639	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		640	}
		641	}
		642
		643	static void
		644	childcb (EV_P_ struct ev_signal *sw, int revents)
		645	{
		646	int pid, status;
		647
		648	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		649	{
		650	/* make sure we are called again until all childs have been reaped */
		651	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		652
		653	child_reap (EV_A_ sw, pid, pid, status);
		654	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		655	}
		656	}
		657
		658	#endif
331		659
332	/*****************************************************************************/	660	/*****************************************************************************/
333		661
		662	#if EV_USE_KQUEUE
		663	# include "ev_kqueue.c"
		664	#endif
334	#if HAVE_EPOLL	665	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	666	# include "ev_epoll.c"
336	#endif	667	#endif
		668	#if EV_USE_POLL
		669	# include "ev_poll.c"
		670	#endif
337	#if HAVE_SELECT	671	#if EV_USE_SELECT
338	# include "ev_select.c"	672	# include "ev_select.c"
339	#endif	673	#endif
340		674
341	int ev_init (int flags)	675	int
		676	ev_version_major (void)
342	{	677	{
		678	return EV_VERSION_MAJOR;
		679	}
		680
		681	int
		682	ev_version_minor (void)
		683	{
		684	return EV_VERSION_MINOR;
		685	}
		686
		687	/* return true if we are running with elevated privileges and should ignore env variables */
		688	static int
		689	enable_secure (void)
		690	{
		691	#ifdef WIN32
		692	return 0;
		693	#else
		694	return getuid () != geteuid ()
		695	\|\| getgid () != getegid ();
		696	#endif
		697	}
		698
		699	int
		700	ev_method (EV_P)
		701	{
		702	return method;
		703	}
		704
		705	static void
		706	loop_init (EV_P_ int methods)
		707	{
		708	if (!method)
		709	{
343	#if HAVE_MONOTONIC	710	#if EV_USE_MONOTONIC
344	{	711	{
345	struct timespec ts;	712	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	713	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	714	have_monotonic = 1;
348	}	715	}
349	#endif	716	#endif
350		717
351	ev_now = ev_time ();	718	rt_now = ev_time ();
352	now = get_clock ();	719	mn_now = get_clock ();
353	diff = ev_now - now;	720	now_floor = mn_now;
		721	rtmn_diff = rt_now - mn_now;
354		722
		723	if (methods == EVMETHOD_AUTO)
		724	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		725	methods = atoi (getenv ("LIBEV_METHODS"));
		726	else
		727	methods = EVMETHOD_ANY;
		728
		729	method = 0;
		730	#if EV_USE_WIN32
		731	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		732	#endif
		733	#if EV_USE_KQUEUE
		734	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		735	#endif
		736	#if EV_USE_EPOLL
		737	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		738	#endif
		739	#if EV_USE_POLL
		740	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		741	#endif
		742	#if EV_USE_SELECT
		743	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		744	#endif
		745
		746	ev_watcher_init (&sigev, sigcb);
		747	ev_set_priority (&sigev, EV_MAXPRI);
		748	}
		749	}
		750
		751	void
		752	loop_destroy (EV_P)
		753	{
		754	int i;
		755
		756	#if EV_USE_WIN32
		757	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		758	#endif
		759	#if EV_USE_KQUEUE
		760	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		761	#endif
		762	#if EV_USE_EPOLL
		763	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		764	#endif
		765	#if EV_USE_POLL
		766	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		767	#endif
		768	#if EV_USE_SELECT
		769	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		770	#endif
		771
		772	for (i = NUMPRI; i--; )
		773	array_free (pending, [i]);
		774
		775	/* have to use the microsoft-never-gets-it-right macro */
		776	array_free_microshit (fdchange);
		777	array_free_microshit (timer);
		778	array_free_microshit (periodic);
		779	array_free_microshit (idle);
		780	array_free_microshit (prepare);
		781	array_free_microshit (check);
		782
		783	method = 0;
		784	}
		785
		786	static void
		787	loop_fork (EV_P)
		788	{
		789	#if EV_USE_EPOLL
		790	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		791	#endif
		792	#if EV_USE_KQUEUE
		793	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		794	#endif
		795
		796	if (ev_is_active (&sigev))
		797	{
		798	/* default loop */
		799
		800	ev_ref (EV_A);
		801	ev_io_stop (EV_A_ &sigev);
		802	close (sigpipe [0]);
		803	close (sigpipe [1]);
		804
		805	while (pipe (sigpipe))
		806	syserr ("(libev) error creating pipe");
		807
		808	siginit (EV_A);
		809	}
		810
		811	postfork = 0;
		812	}
		813
		814	#if EV_MULTIPLICITY
		815	struct ev_loop *
		816	ev_loop_new (int methods)
		817	{
		818	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		819
		820	memset (loop, 0, sizeof (struct ev_loop));
		821
		822	loop_init (EV_A_ methods);
		823
		824	if (ev_method (EV_A))
		825	return loop;
		826
		827	return 0;
		828	}
		829
		830	void
		831	ev_loop_destroy (EV_P)
		832	{
		833	loop_destroy (EV_A);
		834	ev_free (loop);
		835	}
		836
		837	void
		838	ev_loop_fork (EV_P)
		839	{
		840	postfork = 1;
		841	}
		842
		843	#endif
		844
		845	#if EV_MULTIPLICITY
		846	struct ev_loop default_loop_struct;
		847	static struct ev_loop *default_loop;
		848
		849	struct ev_loop *
		850	#else
		851	static int default_loop;
		852
		853	int
		854	#endif
		855	ev_default_loop (int methods)
		856	{
		857	if (sigpipe [0] == sigpipe [1])
355	if (pipe (sigpipe))	858	if (pipe (sigpipe))
356	return 0;	859	return 0;
357		860
358	ev_method = EVMETHOD_NONE;	861	if (!default_loop)
359	#if HAVE_EPOLL	862	{
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	863	#if EV_MULTIPLICITY
		864	struct ev_loop *loop = default_loop = &default_loop_struct;
		865	#else
		866	default_loop = 1;
361	#endif	867	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365		868
		869	loop_init (EV_A_ methods);
		870
		871	if (ev_method (EV_A))
		872	{
		873	siginit (EV_A);
		874
		875	#ifndef WIN32
		876	ev_signal_init (&childev, childcb, SIGCHLD);
		877	ev_set_priority (&childev, EV_MAXPRI);
		878	ev_signal_start (EV_A_ &childev);
		879	ev_unref (EV_A); /* child watcher should not keep loop alive */
		880	#endif
		881	}
		882	else
		883	default_loop = 0;
		884	}
		885
		886	return default_loop;
		887	}
		888
		889	void
		890	ev_default_destroy (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
		896	#ifndef WIN32
		897	ev_ref (EV_A); /* child watcher */
		898	ev_signal_stop (EV_A_ &childev);
		899	#endif
		900
		901	ev_ref (EV_A); /* signal watcher */
		902	ev_io_stop (EV_A_ &sigev);
		903
		904	close (sigpipe [0]); sigpipe [0] = 0;
		905	close (sigpipe [1]); sigpipe [1] = 0;
		906
		907	loop_destroy (EV_A);
		908	}
		909
		910	void
		911	ev_default_fork (void)
		912	{
		913	#if EV_MULTIPLICITY
		914	struct ev_loop *loop = default_loop;
		915	#endif
		916
366	if (ev_method)	917	if (method)
367	{	918	postfork = 1;
368	evw_init (&sigev, sigcb);
369	siginit ();
370	}
371
372	return ev_method;
373	}	919	}
374		920
375	/*****************************************************************************/	921	/*****************************************************************************/
376		922
377	void ev_prefork (void)
378	{
379	/* nop */
380	}
381
382	void ev_postfork_parent (void)
383	{
384	/* nop */
385	}
386
387	void ev_postfork_child (void)
388	{
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();
392	#endif
393
394	evio_stop (&sigev);
395	close (sigpipe [0]);
396	close (sigpipe [1]);
397	pipe (sigpipe);
398	siginit ();
399	}
400
401	/*****************************************************************************/
402
403	static void	923	static int
404	fd_reify (void)	924	any_pending (EV_P)
405	{	925	{
406	int i;	926	int pri;
407		927
408	for (i = 0; i < fdchangecnt; ++i)	928	for (pri = NUMPRI; pri--; )
409	{	929	if (pendingcnt [pri])
410	int fd = fdchanges [i];	930	return 1;
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413		931
414	int wev = 0;	932	return 0;
415
416	for (w = anfd->head; w; w = w->next)
417	wev \|= w->events;
418
419	if (anfd->wev != wev)
420	{
421	method_modify (fd, anfd->wev, wev);
422	anfd->wev = wev;
423	}
424	}
425
426	fdchangecnt = 0;
427	}	933	}
428		934
429	static void	935	static void
430	call_pending ()	936	call_pending (EV_P)
431	{	937	{
		938	int pri;
		939
		940	for (pri = NUMPRI; pri--; )
432	while (pendingcnt)	941	while (pendingcnt [pri])
433	{	942	{
434	ANPENDING *p = pendings + --pendingcnt;	943	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		944
436	if (p->w)	945	if (p->w)
437	{	946	{
438	p->w->pending = 0;	947	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	948	p->w->cb (EV_A_ p->w, p->events);
440	}	949	}
441	}	950	}
442	}	951	}
443		952
444	static void	953	static void
445	timers_reify ()	954	timers_reify (EV_P)
446	{	955	{
447	while (timercnt && timers [0]->at <= now)	956	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	957	{
449	struct ev_timer *w = timers [0];	958	struct ev_timer *w = timers [0];
450		959
451	event ((W)w, EV_TIMEOUT);	960	assert (("inactive timer on timer heap detected", ev_is_active (w)));
452		961
453	/* first reschedule or stop timer */	962	/* first reschedule or stop timer */
454	if (w->repeat)	963	if (w->repeat)
455	{	964	{
		965	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	966	((WT)w)->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	967	downheap ((WT *)timers, timercnt, 0);
459	}	968	}
460	else	969	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	970	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		971
		972	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		973	}
		974	}
		975
465	static void	976	static void
466	periodics_reify ()	977	periodics_reify (EV_P)
467	{	978	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	979	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
469	{	980	{
470	struct ev_periodic *w = periodics [0];	981	struct ev_periodic *w = periodics [0];
471		982
		983	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		984
472	/* first reschedule or stop timer */	985	/* first reschedule or stop timer */
473	if (w->interval)	986	if (w->reschedule_cb)
474	{	987	{
		988	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		989
		990	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		991	downheap ((WT *)periodics, periodiccnt, 0);
		992	}
		993	else if (w->interval)
		994	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	995	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
476	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	996	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	997	downheap ((WT *)periodics, periodiccnt, 0);
478	}	998	}
479	else	999	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	1000	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		1001
482	event ((W)w, EV_TIMEOUT);	1002	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
483	}	1003	}
484	}	1004	}
485		1005
486	static void	1006	static void
487	periodics_reschedule (ev_tstamp diff)	1007	periodics_reschedule (EV_P)
488	{	1008	{
489	int i;	1009	int i;
490		1010
491	/* adjust periodics after time jump */	1011	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	1012	for (i = 0; i < periodiccnt; ++i)
493	{	1013	{
494	struct ev_periodic *w = periodics [i];	1014	struct ev_periodic *w = periodics [i];
495		1015
		1016	if (w->reschedule_cb)
		1017	((WT)w)->at = w->reschedule_cb (w, rt_now);
496	if (w->interval)	1018	else if (w->interval)
		1019	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1020	}
		1021
		1022	/* now rebuild the heap */
		1023	for (i = periodiccnt >> 1; i--; )
		1024	downheap ((WT *)periodics, periodiccnt, i);
		1025	}
		1026
		1027	inline int
		1028	time_update_monotonic (EV_P)
		1029	{
		1030	mn_now = get_clock ();
		1031
		1032	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1033	{
		1034	rt_now = rtmn_diff + mn_now;
		1035	return 0;
		1036	}
		1037	else
		1038	{
		1039	now_floor = mn_now;
		1040	rt_now = ev_time ();
		1041	return 1;
		1042	}
		1043	}
		1044
		1045	static void
		1046	time_update (EV_P)
		1047	{
		1048	int i;
		1049
		1050	#if EV_USE_MONOTONIC
		1051	if (expect_true (have_monotonic))
		1052	{
		1053	if (time_update_monotonic (EV_A))
497	{	1054	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1055	ev_tstamp odiff = rtmn_diff;
499		1056
500	if (fabs (diff) >= 1e-4)	1057	for (i = 4; --i; ) /* loop a few times, before making important decisions */
501	{	1058	{
502	evperiodic_stop (w);	1059	rtmn_diff = rt_now - mn_now;
503	evperiodic_start (w);
504		1060
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1061	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1062	return; /* all is well */
		1063
		1064	rt_now = ev_time ();
		1065	mn_now = get_clock ();
		1066	now_floor = mn_now;
506	}	1067	}
		1068
		1069	periodics_reschedule (EV_A);
		1070	/* no timer adjustment, as the monotonic clock doesn't jump */
		1071	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
507	}	1072	}
508	}	1073	}
509	}	1074	else
510		1075	#endif
511	static void	1076	{
512	time_update ()
513	{
514	int i;
515
516	ev_now = ev_time ();	1077	rt_now = ev_time ();
517		1078
518	if (have_monotonic)	1079	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
519	{
520	ev_tstamp odiff = diff;
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	1080	{
524	now = get_clock ();
525	diff = ev_now - now;
526
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)
528	return; /* all is well */
529
530	ev_now = ev_time ();
531	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}
536	else
537	{
538	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
539	{
540	periodics_reschedule (ev_now - now);	1081	periodics_reschedule (EV_A);
541		1082
542	/* adjust timers. this is easy, as the offset is the same for all */	1083	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	1084	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	1085	((WT)timers [i])->at += rt_now - mn_now;
545	}	1086	}
546		1087
547	now = ev_now;	1088	mn_now = rt_now;
548	}	1089	}
549	}	1090	}
550		1091
551	int ev_loop_done;	1092	void
		1093	ev_ref (EV_P)
		1094	{
		1095	++activecnt;
		1096	}
552		1097
		1098	void
		1099	ev_unref (EV_P)
		1100	{
		1101	--activecnt;
		1102	}
		1103
		1104	static int loop_done;
		1105
		1106	void
553	void ev_loop (int flags)	1107	ev_loop (EV_P_ int flags)
554	{	1108	{
555	double block;	1109	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1110	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
557
558	if (checkcnt)
559	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);
561	call_pending ();
562	}
563		1111
564	do	1112	do
565	{	1113	{
		1114	/* queue check watchers (and execute them) */
		1115	if (expect_false (preparecnt))
		1116	{
		1117	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1118	call_pending (EV_A);
		1119	}
		1120
		1121	/* we might have forked, so reify kernel state if necessary */
		1122	if (expect_false (postfork))
		1123	loop_fork (EV_A);
		1124
566	/* update fd-related kernel structures */	1125	/* update fd-related kernel structures */
567	fd_reify ();	1126	fd_reify (EV_A);
568		1127
569	/* calculate blocking time */	1128	/* calculate blocking time */
570		1129
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1130	/* we only need this for !monotonic clock or timers, but as we basically
		1131	always have timers, we just calculate it always */
		1132	#if EV_USE_MONOTONIC
		1133	if (expect_true (have_monotonic))
		1134	time_update_monotonic (EV_A);
		1135	else
		1136	#endif
		1137	{
572	ev_now = ev_time ();	1138	rt_now = ev_time ();
		1139	mn_now = rt_now;
		1140	}
573		1141
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1142	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	1143	block = 0.;
576	else	1144	else
577	{	1145	{
578	block = MAX_BLOCKTIME;	1146	block = MAX_BLOCKTIME;
579		1147
580	if (timercnt)	1148	if (timercnt)
581	{	1149	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1150	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
583	if (block > to) block = to;	1151	if (block > to) block = to;
584	}	1152	}
585		1153
586	if (periodiccnt)	1154	if (periodiccnt)
587	{	1155	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1156	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
589	if (block > to) block = to;	1157	if (block > to) block = to;
590	}	1158	}
591		1159
592	if (block < 0.) block = 0.;	1160	if (block < 0.) block = 0.;
593	}	1161	}
594		1162
595	method_poll (block);	1163	method_poll (EV_A_ block);
596		1164
597	/* update ev_now, do magic */	1165	/* update rt_now, do magic */
598	time_update ();	1166	time_update (EV_A);
599		1167
600	/* queue pending timers and reschedule them */	1168	/* queue pending timers and reschedule them */
		1169	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	1170	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		1171
604	/* queue idle watchers unless io or timers are pending */	1172	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1173	if (idlecnt && !any_pending (EV_A))
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1174	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1175
608	/* queue check and possibly idle watchers */	1176	/* queue check watchers, to be executed first */
		1177	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1178	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1179
611	call_pending ();	1180	call_pending (EV_A);
612	}	1181	}
613	while (!ev_loop_done);	1182	while (activecnt && !loop_done);
614		1183
615	if (ev_loop_done != 2)	1184	if (loop_done != 2)
616	ev_loop_done = 0;	1185	loop_done = 0;
		1186	}
		1187
		1188	void
		1189	ev_unloop (EV_P_ int how)
		1190	{
		1191	loop_done = how;
617	}	1192	}
618		1193
619	/*****************************************************************************/	1194	/*****************************************************************************/
620		1195
621	static void	1196	inline void
622	wlist_add (WL *head, WL elem)	1197	wlist_add (WL *head, WL elem)
623	{	1198	{
624	elem->next = *head;	1199	elem->next = *head;
625	*head = elem;	1200	*head = elem;
626	}	1201	}
627		1202
628	static void	1203	inline void
629	wlist_del (WL *head, WL elem)	1204	wlist_del (WL *head, WL elem)
630	{	1205	{
631	while (*head)	1206	while (*head)
632	{	1207	{
633	if (*head == elem)	1208	if (*head == elem)
…		…
638		1213
639	head = &(*head)->next;	1214	head = &(*head)->next;
640	}	1215	}
641	}	1216	}
642		1217
643	static void	1218	inline void
644	ev_clear (W w)	1219	ev_clear_pending (EV_P_ W w)
645	{	1220	{
646	if (w->pending)	1221	if (w->pending)
647	{	1222	{
648	pendings [w->pending - 1].w = 0;	1223	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1224	w->pending = 0;
650	}	1225	}
651	}	1226	}
652		1227
653	static void	1228	inline void
654	ev_start (W w, int active)	1229	ev_start (EV_P_ W w, int active)
655	{	1230	{
		1231	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1232	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1233
656	w->active = active;	1234	w->active = active;
		1235	ev_ref (EV_A);
657	}	1236	}
658		1237
659	static void	1238	inline void
660	ev_stop (W w)	1239	ev_stop (EV_P_ W w)
661	{	1240	{
		1241	ev_unref (EV_A);
662	w->active = 0;	1242	w->active = 0;
663	}	1243	}
664		1244
665	/*****************************************************************************/	1245	/*****************************************************************************/
666		1246
667	void	1247	void
668	evio_start (struct ev_io *w)	1248	ev_io_start (EV_P_ struct ev_io *w)
669	{	1249	{
		1250	int fd = w->fd;
		1251
670	if (ev_is_active (w))	1252	if (ev_is_active (w))
671	return;	1253	return;
672		1254
673	int fd = w->fd;	1255	assert (("ev_io_start called with negative fd", fd >= 0));
674		1256
675	ev_start ((W)w, 1);	1257	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1258	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1259	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1260
679	++fdchangecnt;	1261	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1262	}
683		1263
684	void	1264	void
685	evio_stop (struct ev_io *w)	1265	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1266	{
687	ev_clear ((W)w);	1267	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1268	if (!ev_is_active (w))
689	return;	1269	return;
690		1270
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1271	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1272	ev_stop (EV_A_ (W)w);
693		1273
694	++fdchangecnt;	1274	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1275	}
698		1276
699	void	1277	void
700	evtimer_start (struct ev_timer *w)	1278	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1279	{
702	if (ev_is_active (w))	1280	if (ev_is_active (w))
703	return;	1281	return;
704		1282
705	w->at += now;	1283	((WT)w)->at += mn_now;
706		1284
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1285	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1286
709	ev_start ((W)w, ++timercnt);	1287	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1288	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
711	timers [timercnt - 1] = w;	1289	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1290	upheap ((WT *)timers, timercnt - 1);
713	}
714		1291
		1292	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1293	}
		1294
715	void	1295	void
716	evtimer_stop (struct ev_timer *w)	1296	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1297	{
718	ev_clear ((W)w);	1298	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1299	if (!ev_is_active (w))
720	return;	1300	return;
721		1301
		1302	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1303
722	if (w->active < timercnt--)	1304	if (((W)w)->active < timercnt--)
723	{	1305	{
724	timers [w->active - 1] = timers [timercnt];	1306	timers [((W)w)->active - 1] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1307	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
726	}	1308	}
727		1309
728	w->at = w->repeat;	1310	((WT)w)->at = w->repeat;
729		1311
730	ev_stop ((W)w);	1312	ev_stop (EV_A_ (W)w);
731	}	1313	}
732		1314
733	void	1315	void
734	evtimer_again (struct ev_timer *w)	1316	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1317	{
736	if (ev_is_active (w))	1318	if (ev_is_active (w))
737	{	1319	{
738	if (w->repeat)	1320	if (w->repeat)
739	{	1321	{
740	w->at = now + w->repeat;	1322	((WT)w)->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1323	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
742	}	1324	}
743	else	1325	else
744	evtimer_stop (w);	1326	ev_timer_stop (EV_A_ w);
745	}	1327	}
746	else if (w->repeat)	1328	else if (w->repeat)
747	evtimer_start (w);	1329	ev_timer_start (EV_A_ w);
748	}	1330	}
749		1331
750	void	1332	void
751	evperiodic_start (struct ev_periodic *w)	1333	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1334	{
753	if (ev_is_active (w))	1335	if (ev_is_active (w))
754	return;	1336	return;
755		1337
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1338	if (w->reschedule_cb)
757		1339	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1340	else if (w->interval)
		1341	{
		1342	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1343	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1344	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1345	}
761		1346
762	ev_start ((W)w, ++periodiccnt);	1347	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1348	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
764	periodics [periodiccnt - 1] = w;	1349	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1350	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1351
		1352	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1353	}
		1354
768	void	1355	void
769	evperiodic_stop (struct ev_periodic *w)	1356	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1357	{
771	ev_clear ((W)w);	1358	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1359	if (!ev_is_active (w))
773	return;	1360	return;
774		1361
		1362	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1363
775	if (w->active < periodiccnt--)	1364	if (((W)w)->active < periodiccnt--)
776	{	1365	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1366	periodics [((W)w)->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1367	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
779	}	1368	}
780		1369
781	ev_stop ((W)w);	1370	ev_stop (EV_A_ (W)w);
782	}	1371	}
783		1372
784	void	1373	void
785	evsignal_start (struct ev_signal *w)	1374	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1375	{
		1376	ev_periodic_stop (EV_A_ w);
		1377	ev_periodic_start (EV_A_ w);
		1378	}
		1379
		1380	void
		1381	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1382	{
787	if (ev_is_active (w))	1383	if (ev_is_active (w))
788	return;	1384	return;
789		1385
		1386	ev_start (EV_A_ (W)w, ++idlecnt);
		1387	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1388	idles [idlecnt - 1] = w;
		1389	}
		1390
		1391	void
		1392	ev_idle_stop (EV_P_ struct ev_idle *w)
		1393	{
		1394	ev_clear_pending (EV_A_ (W)w);
		1395	if (ev_is_active (w))
		1396	return;
		1397
		1398	idles [((W)w)->active - 1] = idles [--idlecnt];
		1399	ev_stop (EV_A_ (W)w);
		1400	}
		1401
		1402	void
		1403	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1404	{
		1405	if (ev_is_active (w))
		1406	return;
		1407
		1408	ev_start (EV_A_ (W)w, ++preparecnt);
		1409	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1410	prepares [preparecnt - 1] = w;
		1411	}
		1412
		1413	void
		1414	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1415	{
		1416	ev_clear_pending (EV_A_ (W)w);
		1417	if (ev_is_active (w))
		1418	return;
		1419
		1420	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1421	ev_stop (EV_A_ (W)w);
		1422	}
		1423
		1424	void
		1425	ev_check_start (EV_P_ struct ev_check *w)
		1426	{
		1427	if (ev_is_active (w))
		1428	return;
		1429
		1430	ev_start (EV_A_ (W)w, ++checkcnt);
		1431	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1432	checks [checkcnt - 1] = w;
		1433	}
		1434
		1435	void
		1436	ev_check_stop (EV_P_ struct ev_check *w)
		1437	{
		1438	ev_clear_pending (EV_A_ (W)w);
		1439	if (ev_is_active (w))
		1440	return;
		1441
		1442	checks [((W)w)->active - 1] = checks [--checkcnt];
		1443	ev_stop (EV_A_ (W)w);
		1444	}
		1445
		1446	#ifndef SA_RESTART
		1447	# define SA_RESTART 0
		1448	#endif
		1449
		1450	void
		1451	ev_signal_start (EV_P_ struct ev_signal *w)
		1452	{
		1453	#if EV_MULTIPLICITY
		1454	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1455	#endif
		1456	if (ev_is_active (w))
		1457	return;
		1458
		1459	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1460
790	ev_start ((W)w, 1);	1461	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1462	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1463	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1464
794	if (!w->next)	1465	if (!((WL)w)->next)
795	{	1466	{
		1467	#if WIN32
		1468	signal (w->signum, sighandler);
		1469	#else
796	struct sigaction sa;	1470	struct sigaction sa;
797	sa.sa_handler = sighandler;	1471	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1472	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1473	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1474	sigaction (w->signum, &sa, 0);
		1475	#endif
801	}	1476	}
802	}	1477	}
803		1478
804	void	1479	void
805	evsignal_stop (struct ev_signal *w)	1480	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1481	{
807	ev_clear ((W)w);	1482	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1483	if (!ev_is_active (w))
809	return;	1484	return;
810		1485
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1486	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1487	ev_stop (EV_A_ (W)w);
813		1488
814	if (!signals [w->signum - 1].head)	1489	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1490	signal (w->signum, SIG_DFL);
816	}	1491	}
817		1492
818	void evidle_start (struct ev_idle *w)	1493	void
		1494	ev_child_start (EV_P_ struct ev_child *w)
819	{	1495	{
		1496	#if EV_MULTIPLICITY
		1497	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1498	#endif
820	if (ev_is_active (w))	1499	if (ev_is_active (w))
821	return;	1500	return;
822		1501
823	ev_start ((W)w, ++idlecnt);	1502	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1503	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1504	}
827		1505
828	void evidle_stop (struct ev_idle *w)	1506	void
		1507	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1508	{
830	ev_clear ((W)w);	1509	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1510	if (ev_is_active (w))
832	return;	1511	return;
833		1512
834	idles [w->active - 1] = idles [--idlecnt];	1513	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1514	ev_stop (EV_A_ (W)w);
836	}
837
838	void evcheck_start (struct ev_check *w)
839	{
840	if (ev_is_active (w))
841	return;
842
843	ev_start ((W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );
845	checks [checkcnt - 1] = w;
846	}
847
848	void evcheck_stop (struct ev_check *w)
849	{
850	ev_clear ((W)w);
851	if (ev_is_active (w))
852	return;
853
854	checks [w->active - 1] = checks [--checkcnt];
855	ev_stop ((W)w);
856	}	1515	}
857		1516
858	/*****************************************************************************/	1517	/*****************************************************************************/
859		1518
860	struct ev_once	1519	struct ev_once
…		…
864	void (cb)(int revents, void arg);	1523	void (cb)(int revents, void arg);
865	void *arg;	1524	void *arg;
866	};	1525	};
867		1526
868	static void	1527	static void
869	once_cb (struct ev_once *once, int revents)	1528	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1529	{
871	void (cb)(int revents, void arg) = once->cb;	1530	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	1531	void *arg = once->arg;
873		1532
874	evio_stop (&once->io);	1533	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1534	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1535	ev_free (once);
877		1536
878	cb (revents, arg);	1537	cb (revents, arg);
879	}	1538	}
880		1539
881	static void	1540	static void
882	once_cb_io (struct ev_io *w, int revents)	1541	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1542	{
884	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1543	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
885	}	1544	}
886		1545
887	static void	1546	static void
888	once_cb_to (struct ev_timer *w, int revents)	1547	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1548	{
890	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1549	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
891	}	1550	}
892		1551
893	void	1552	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1553	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
895	{	1554	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1555	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
897		1556
898	if (!once)	1557	if (!once)
899	cb (EV_ERROR, arg);	1558	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
900	else	1559	else
901	{	1560	{
902	once->cb = cb;	1561	once->cb = cb;
903	once->arg = arg;	1562	once->arg = arg;
904		1563
905	evw_init (&once->io, once_cb_io);	1564	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1565	if (fd >= 0)
908	{	1566	{
909	evio_set (&once->io, fd, events);	1567	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1568	ev_io_start (EV_A_ &once->io);
911	}	1569	}
912		1570
913	evw_init (&once->to, once_cb_to);	1571	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1572	if (timeout >= 0.)
916	{	1573	{
917	evtimer_set (&once->to, timeout, 0.);	1574	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1575	ev_timer_start (EV_A_ &once->to);
919	}	1576	}
920	}	1577	}
921	}	1578	}
922		1579
923	/*****************************************************************************/
924
925	#if 0
926
927	struct ev_io wio;
928
929	static void
930	sin_cb (struct ev_io *w, int revents)
931	{
932	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933	}
934
935	static void
936	ocb (struct ev_timer *w, int revents)
937	{
938	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939	evtimer_stop (w);
940	evtimer_start (w);
941	}
942
943	static void
944	scb (struct ev_signal *w, int revents)
945	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);
948	evio_start (&wio);
949	}
950
951	static void
952	gcb (struct ev_signal *w, int revents)
953	{
954	fprintf (stderr, "generic %x\n", revents);
955
956	}
957
958	int main (void)
959	{
960	ev_init (0);
961
962	evio_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);
964
965	struct ev_timer t[10000];
966
967	#if 0
968	int i;
969	for (i = 0; i < 10000; ++i)
970	{
971	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);
975	if (drand48 () < 0.5)
976	evtimer_stop (w);
977	}
978	#endif
979
980	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);
983
984	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);
987
988	struct ev_check cw;
989	evcheck_init (&cw, gcb);
990	evcheck_start (&cw);
991
992	struct ev_idle iw;
993	evidle_init (&iw, gcb);
994	evidle_start (&iw);
995
996	ev_loop (0);
997
998	return 0;
999	}
1000
1001	#endif
1002
1003
1004
1005

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Comparing libev/ev.c (file contents): Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs. Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.79 by root, Fri Nov 9 15:15:20 2007 UTC