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

Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.78 by root, Thu Nov 8 21:08:56 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	static void
168	fd_event (int fd, int events)	348	fd_event (EV_P_ int fd, int events)
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 & events;
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	/*****************************************************************************/
		363
182	static void	364	static void
183	queue_events (W *events, int eventcnt, int type)	365	fd_reify (EV_P)
184	{	366	{
185	int i;	367	int i;
186		368
187	for (i = 0; i < eventcnt; ++i)	369	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	370	{
		371	int fd = fdchanges [i];
		372	ANFD *anfd = anfds + fd;
		373	struct ev_io *w;
		374
		375	int events = 0;
		376
		377	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		378	events \|= w->events;
		379
		380	anfd->reify = 0;
		381
		382	method_modify (EV_A_ fd, anfd->events, events);
		383	anfd->events = events;
		384	}
		385
		386	fdchangecnt = 0;
		387	}
		388
		389	static void
		390	fd_change (EV_P_ int fd)
		391	{
		392	if (anfds [fd].reify)
		393	return;
		394
		395	anfds [fd].reify = 1;
		396
		397	++fdchangecnt;
		398	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
		399	fdchanges [fdchangecnt - 1] = fd;
		400	}
		401
		402	static void
		403	fd_kill (EV_P_ int fd)
		404	{
		405	struct ev_io *w;
		406
		407	while ((w = (struct ev_io *)anfds [fd].head))
		408	{
		409	ev_io_stop (EV_A_ w);
		410	ev_feed_event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		411	}
		412	}
		413
		414	static int
		415	fd_valid (int fd)
		416	{
		417	#ifdef WIN32
		418	return !!win32_get_osfhandle (fd);
		419	#else
		420	return fcntl (fd, F_GETFD) != -1;
		421	#endif
189	}	422	}
190		423
191	/* called on EBADF to verify fds */	424	/* called on EBADF to verify fds */
192	static void	425	static void
193	fd_recheck ()	426	fd_ebadf (EV_P)
194	{	427	{
195	int fd;	428	int fd;
196		429
197	for (fd = 0; fd < anfdmax; ++fd)	430	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	431	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	432	if (!fd_valid (fd) == -1 && errno == EBADF)
200	while (anfds [fd].head)	433	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	434	}
		435
		436	/* called on ENOMEM in select/poll to kill some fds and retry */
		437	static void
		438	fd_enomem (EV_P)
		439	{
		440	int fd;
		441
		442	for (fd = anfdmax; fd--; )
		443	if (anfds [fd].events)
		444	{
		445	fd_kill (EV_A_ fd);
		446	return;
		447	}
		448	}
		449
		450	/* usually called after fork if method needs to re-arm all fds from scratch */
		451	static void
		452	fd_rearm_all (EV_P)
		453	{
		454	int fd;
		455
		456	/* this should be highly optimised to not do anything but set a flag */
		457	for (fd = 0; fd < anfdmax; ++fd)
		458	if (anfds [fd].events)
		459	{
		460	anfds [fd].events = 0;
		461	fd_change (EV_A_ fd);
		462	}
202	}	463	}
203		464
204	/*****************************************************************************/	465	/*****************************************************************************/
205		466
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	467	static void
213	upheap (WT *timers, int k)	468	upheap (WT *heap, int k)
214	{	469	{
215	WT w = timers [k];	470	WT w = heap [k];
216		471
217	while (k && timers [k >> 1]->at > w->at)	472	while (k && heap [k >> 1]->at > w->at)
218	{	473	{
219	timers [k] = timers [k >> 1];	474	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	475	((W)heap [k])->active = k + 1;
221	k >>= 1;	476	k >>= 1;
222	}	477	}
223		478
224	timers [k] = w;	479	heap [k] = w;
225	timers [k]->active = k + 1;	480	((W)heap [k])->active = k + 1;
226		481
227	}	482	}
228		483
229	static void	484	static void
230	downheap (WT *timers, int N, int k)	485	downheap (WT *heap, int N, int k)
231	{	486	{
232	WT w = timers [k];	487	WT w = heap [k];
233		488
234	while (k < (N >> 1))	489	while (k < (N >> 1))
235	{	490	{
236	int j = k << 1;	491	int j = k << 1;
237		492
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	493	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	494	++j;
240		495
241	if (w->at <= timers [j]->at)	496	if (w->at <= heap [j]->at)
242	break;	497	break;
243		498
244	timers [k] = timers [j];	499	heap [k] = heap [j];
245	timers [k]->active = k + 1;	500	((W)heap [k])->active = k + 1;
246	k = j;	501	k = j;
247	}	502	}
248		503
249	timers [k] = w;	504	heap [k] = w;
250	timers [k]->active = k + 1;	505	((W)heap [k])->active = k + 1;
251	}	506	}
252		507
253	/*****************************************************************************/	508	/*****************************************************************************/
254		509
255	typedef struct	510	typedef struct
256	{	511	{
257	struct ev_signal *head;	512	WL head;
258	sig_atomic_t gotsig;	513	sig_atomic_t volatile gotsig;
259	} ANSIG;	514	} ANSIG;
260		515
261	static ANSIG *signals;	516	static ANSIG *signals;
262	static int signalmax;	517	static int signalmax;
263		518
264	static int sigpipe [2];	519	static int sigpipe [2];
265	static sig_atomic_t gotsig;	520	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	521	static struct ev_io sigev;
267		522
268	static void	523	static void
269	signals_init (ANSIG *base, int count)	524	signals_init (ANSIG *base, int count)
270	{	525	{
271	while (count--)	526	while (count--)
272	{	527	{
273	base->head = 0;	528	base->head = 0;
274	base->gotsig = 0;	529	base->gotsig = 0;
		530
275	++base;	531	++base;
276	}	532	}
277	}	533	}
278		534
279	static void	535	static void
280	sighandler (int signum)	536	sighandler (int signum)
281	{	537	{
		538	#if WIN32
		539	signal (signum, sighandler);
		540	#endif
		541
282	signals [signum - 1].gotsig = 1;	542	signals [signum - 1].gotsig = 1;
283		543
284	if (!gotsig)	544	if (!gotsig)
285	{	545	{
		546	int old_errno = errno;
286	gotsig = 1;	547	gotsig = 1;
		548	#ifdef WIN32
		549	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		550	#else
287	write (sigpipe [1], &gotsig, 1);	551	write (sigpipe [1], &signum, 1);
		552	#endif
		553	errno = old_errno;
288	}	554	}
289	}	555	}
290		556
291	static void	557	static void
292	sigcb (struct ev_io *iow, int revents)	558	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	559	{
294	struct ev_signal *w;	560	WL w;
295	int sig;	561	int signum;
296		562
		563	#ifdef WIN32
		564	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		565	#else
		566	read (sigpipe [0], &revents, 1);
		567	#endif
297	gotsig = 0;	568	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		569
300	for (sig = signalmax; sig--; )	570	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	571	if (signals [signum].gotsig)
302	{	572	{
303	signals [sig].gotsig = 0;	573	signals [signum].gotsig = 0;
304		574
305	for (w = signals [sig].head; w; w = w->next)	575	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	576	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
307	}	577	}
308	}	578	}
309		579
310	static void	580	static void
311	siginit (void)	581	siginit (EV_P)
312	{	582	{
		583	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	584	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	585	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		586
316	/* rather than sort out wether we really need nb, set it */	587	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	588	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	589	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		590	#endif
319		591
320	evio_set (&sigev, sigpipe [0], EV_READ);	592	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	593	ev_io_start (EV_A_ &sigev);
		594	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	595	}
323		596
324	/*****************************************************************************/	597	/*****************************************************************************/
325		598
326	static struct ev_idle **idles;	599	static struct ev_child *childs [PID_HASHSIZE];
327	static int idlemax, idlecnt;
328		600
329	static struct ev_prepare **prepares;	601	#ifndef WIN32
330	static int preparemax, preparecnt;
331		602
332	static struct ev_check **checks;	603	static struct ev_signal childev;
333	static int checkmax, checkcnt;	604
		605	#ifndef WCONTINUED
		606	# define WCONTINUED 0
		607	#endif
		608
		609	static void
		610	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		611	{
		612	struct ev_child *w;
		613
		614	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		615	if (w->pid == pid \|\| !w->pid)
		616	{
		617	ev_priority (w) = ev_priority (sw); /* need to do it now */
		618	w->rpid = pid;
		619	w->rstatus = status;
		620	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		621	}
		622	}
		623
		624	static void
		625	childcb (EV_P_ struct ev_signal *sw, int revents)
		626	{
		627	int pid, status;
		628
		629	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		630	{
		631	/* make sure we are called again until all childs have been reaped */
		632	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
		633
		634	child_reap (EV_A_ sw, pid, pid, status);
		635	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		636	}
		637	}
		638
		639	#endif
334		640
335	/*****************************************************************************/	641	/*****************************************************************************/
336		642
		643	#if EV_USE_KQUEUE
		644	# include "ev_kqueue.c"
		645	#endif
337	#if HAVE_EPOLL	646	#if EV_USE_EPOLL
338	# include "ev_epoll.c"	647	# include "ev_epoll.c"
339	#endif	648	#endif
		649	#if EV_USE_POLL
		650	# include "ev_poll.c"
		651	#endif
340	#if HAVE_SELECT	652	#if EV_USE_SELECT
341	# include "ev_select.c"	653	# include "ev_select.c"
342	#endif	654	#endif
343		655
344	int ev_init (int flags)	656	int
		657	ev_version_major (void)
345	{	658	{
		659	return EV_VERSION_MAJOR;
		660	}
		661
		662	int
		663	ev_version_minor (void)
		664	{
		665	return EV_VERSION_MINOR;
		666	}
		667
		668	/* return true if we are running with elevated privileges and should ignore env variables */
		669	static int
		670	enable_secure (void)
		671	{
		672	#ifdef WIN32
		673	return 0;
		674	#else
		675	return getuid () != geteuid ()
		676	\|\| getgid () != getegid ();
		677	#endif
		678	}
		679
		680	int
		681	ev_method (EV_P)
		682	{
		683	return method;
		684	}
		685
		686	static void
		687	loop_init (EV_P_ int methods)
		688	{
		689	if (!method)
		690	{
346	#if HAVE_MONOTONIC	691	#if EV_USE_MONOTONIC
347	{	692	{
348	struct timespec ts;	693	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	694	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;	695	have_monotonic = 1;
351	}	696	}
352	#endif	697	#endif
353		698
354	ev_now = ev_time ();	699	rt_now = ev_time ();
355	now = get_clock ();	700	mn_now = get_clock ();
356	diff = ev_now - now;	701	now_floor = mn_now;
		702	rtmn_diff = rt_now - mn_now;
357		703
		704	if (methods == EVMETHOD_AUTO)
		705	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		706	methods = atoi (getenv ("LIBEV_METHODS"));
		707	else
		708	methods = EVMETHOD_ANY;
		709
		710	method = 0;
		711	#if EV_USE_WIN32
		712	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		713	#endif
		714	#if EV_USE_KQUEUE
		715	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		716	#endif
		717	#if EV_USE_EPOLL
		718	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		719	#endif
		720	#if EV_USE_POLL
		721	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		722	#endif
		723	#if EV_USE_SELECT
		724	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		725	#endif
		726
		727	ev_watcher_init (&sigev, sigcb);
		728	ev_set_priority (&sigev, EV_MAXPRI);
		729	}
		730	}
		731
		732	void
		733	loop_destroy (EV_P)
		734	{
		735	int i;
		736
		737	#if EV_USE_WIN32
		738	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		739	#endif
		740	#if EV_USE_KQUEUE
		741	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		742	#endif
		743	#if EV_USE_EPOLL
		744	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		745	#endif
		746	#if EV_USE_POLL
		747	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		748	#endif
		749	#if EV_USE_SELECT
		750	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		751	#endif
		752
		753	for (i = NUMPRI; i--; )
		754	array_free (pending, [i]);
		755
		756	/* have to use the microsoft-never-gets-it-right macro */
		757	array_free_microshit (fdchange);
		758	array_free_microshit (timer);
		759	array_free_microshit (periodic);
		760	array_free_microshit (idle);
		761	array_free_microshit (prepare);
		762	array_free_microshit (check);
		763
		764	method = 0;
		765	}
		766
		767	static void
		768	loop_fork (EV_P)
		769	{
		770	#if EV_USE_EPOLL
		771	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		772	#endif
		773	#if EV_USE_KQUEUE
		774	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		775	#endif
		776
		777	if (ev_is_active (&sigev))
		778	{
		779	/* default loop */
		780
		781	ev_ref (EV_A);
		782	ev_io_stop (EV_A_ &sigev);
		783	close (sigpipe [0]);
		784	close (sigpipe [1]);
		785
		786	while (pipe (sigpipe))
		787	syserr ("(libev) error creating pipe");
		788
		789	siginit (EV_A);
		790	}
		791
		792	postfork = 0;
		793	}
		794
		795	#if EV_MULTIPLICITY
		796	struct ev_loop *
		797	ev_loop_new (int methods)
		798	{
		799	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		800
		801	memset (loop, 0, sizeof (struct ev_loop));
		802
		803	loop_init (EV_A_ methods);
		804
		805	if (ev_method (EV_A))
		806	return loop;
		807
		808	return 0;
		809	}
		810
		811	void
		812	ev_loop_destroy (EV_P)
		813	{
		814	loop_destroy (EV_A);
		815	ev_free (loop);
		816	}
		817
		818	void
		819	ev_loop_fork (EV_P)
		820	{
		821	postfork = 1;
		822	}
		823
		824	#endif
		825
		826	#if EV_MULTIPLICITY
		827	struct ev_loop default_loop_struct;
		828	static struct ev_loop *default_loop;
		829
		830	struct ev_loop *
		831	#else
		832	static int default_loop;
		833
		834	int
		835	#endif
		836	ev_default_loop (int methods)
		837	{
		838	if (sigpipe [0] == sigpipe [1])
358	if (pipe (sigpipe))	839	if (pipe (sigpipe))
359	return 0;	840	return 0;
360		841
361	ev_method = EVMETHOD_NONE;	842	if (!default_loop)
362	#if HAVE_EPOLL	843	{
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	844	#if EV_MULTIPLICITY
		845	struct ev_loop *loop = default_loop = &default_loop_struct;
		846	#else
		847	default_loop = 1;
364	#endif	848	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368		849
		850	loop_init (EV_A_ methods);
		851
		852	if (ev_method (EV_A))
		853	{
		854	siginit (EV_A);
		855
		856	#ifndef WIN32
		857	ev_signal_init (&childev, childcb, SIGCHLD);
		858	ev_set_priority (&childev, EV_MAXPRI);
		859	ev_signal_start (EV_A_ &childev);
		860	ev_unref (EV_A); /* child watcher should not keep loop alive */
		861	#endif
		862	}
		863	else
		864	default_loop = 0;
		865	}
		866
		867	return default_loop;
		868	}
		869
		870	void
		871	ev_default_destroy (void)
		872	{
		873	#if EV_MULTIPLICITY
		874	struct ev_loop *loop = default_loop;
		875	#endif
		876
		877	#ifndef WIN32
		878	ev_ref (EV_A); /* child watcher */
		879	ev_signal_stop (EV_A_ &childev);
		880	#endif
		881
		882	ev_ref (EV_A); /* signal watcher */
		883	ev_io_stop (EV_A_ &sigev);
		884
		885	close (sigpipe [0]); sigpipe [0] = 0;
		886	close (sigpipe [1]); sigpipe [1] = 0;
		887
		888	loop_destroy (EV_A);
		889	}
		890
		891	void
		892	ev_default_fork (void)
		893	{
		894	#if EV_MULTIPLICITY
		895	struct ev_loop *loop = default_loop;
		896	#endif
		897
369	if (ev_method)	898	if (method)
370	{	899	postfork = 1;
371	evw_init (&sigev, sigcb);
372	siginit ();
373	}
374
375	return ev_method;
376	}	900	}
377		901
378	/*****************************************************************************/	902	/*****************************************************************************/
379		903
380	void ev_prefork (void)
381	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif
396
397	evio_stop (&sigev);
398	close (sigpipe [0]);
399	close (sigpipe [1]);
400	pipe (sigpipe);
401	siginit ();
402	}
403
404	/*****************************************************************************/
405
406	static void	904	static int
407	fd_reify (void)	905	any_pending (EV_P)
408	{	906	{
409	int i;	907	int pri;
410		908
411	for (i = 0; i < fdchangecnt; ++i)	909	for (pri = NUMPRI; pri--; )
412	{	910	if (pendingcnt [pri])
413	int fd = fdchanges [i];	911	return 1;
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416		912
417	int wev = 0;	913	return 0;
418
419	for (w = anfd->head; w; w = w->next)
420	wev \|= w->events;
421
422	if (anfd->wev != wev)
423	{
424	method_modify (fd, anfd->wev, wev);
425	anfd->wev = wev;
426	}
427	}
428
429	fdchangecnt = 0;
430	}	914	}
431		915
432	static void	916	static void
433	call_pending ()	917	call_pending (EV_P)
434	{	918	{
		919	int pri;
		920
		921	for (pri = NUMPRI; pri--; )
435	while (pendingcnt)	922	while (pendingcnt [pri])
436	{	923	{
437	ANPENDING *p = pendings + --pendingcnt;	924	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
438		925
439	if (p->w)	926	if (p->w)
440	{	927	{
441	p->w->pending = 0;	928	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	929	p->w->cb (EV_A_ p->w, p->events);
443	}	930	}
444	}	931	}
445	}	932	}
446		933
447	static void	934	static void
448	timers_reify ()	935	timers_reify (EV_P)
449	{	936	{
450	while (timercnt && timers [0]->at <= now)	937	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	938	{
452	struct ev_timer *w = timers [0];	939	struct ev_timer *w = timers [0];
453		940
454	event ((W)w, EV_TIMEOUT);	941	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		942
456	/* first reschedule or stop timer */	943	/* first reschedule or stop timer */
457	if (w->repeat)	944	if (w->repeat)
458	{	945	{
		946	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
459	w->at = now + w->repeat;	947	((WT)w)->at = mn_now + w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));
461	downheap ((WT *)timers, timercnt, 0);	948	downheap ((WT *)timers, timercnt, 0);
462	}	949	}
463	else	950	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	951	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		952
		953	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		954	}
		955	}
		956
468	static void	957	static void
469	periodics_reify ()	958	periodics_reify (EV_P)
470	{	959	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	960	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
472	{	961	{
473	struct ev_periodic *w = periodics [0];	962	struct ev_periodic *w = periodics [0];
474		963
		964	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		965
475	/* first reschedule or stop timer */	966	/* first reschedule or stop timer */
476	if (w->interval)	967	if (w->reschedule_cb)
477	{	968	{
		969	ev_tstamp at = ((WT)w)->at = w->reschedule_cb (w, rt_now + 0.0001);
		970
		971	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > rt_now));
		972	downheap ((WT *)periodics, periodiccnt, 0);
		973	}
		974	else if (w->interval)
		975	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	976	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	977	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	978	downheap ((WT *)periodics, periodiccnt, 0);
481	}	979	}
482	else	980	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	981	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		982
485	event ((W)w, EV_TIMEOUT);	983	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
486	}	984	}
487	}	985	}
488		986
489	static void	987	static void
490	periodics_reschedule (ev_tstamp diff)	988	periodics_reschedule (EV_P)
491	{	989	{
492	int i;	990	int i;
493		991
494	/* adjust periodics after time jump */	992	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	993	for (i = 0; i < periodiccnt; ++i)
496	{	994	{
497	struct ev_periodic *w = periodics [i];	995	struct ev_periodic *w = periodics [i];
498		996
		997	if (w->reschedule_cb)
		998	((WT)w)->at = w->reschedule_cb (w, rt_now);
499	if (w->interval)	999	else if (w->interval)
		1000	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1001	}
		1002
		1003	/* now rebuild the heap */
		1004	for (i = periodiccnt >> 1; i--; )
		1005	downheap ((WT *)periodics, periodiccnt, i);
		1006	}
		1007
		1008	inline int
		1009	time_update_monotonic (EV_P)
		1010	{
		1011	mn_now = get_clock ();
		1012
		1013	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		1014	{
		1015	rt_now = rtmn_diff + mn_now;
		1016	return 0;
		1017	}
		1018	else
		1019	{
		1020	now_floor = mn_now;
		1021	rt_now = ev_time ();
		1022	return 1;
		1023	}
		1024	}
		1025
		1026	static void
		1027	time_update (EV_P)
		1028	{
		1029	int i;
		1030
		1031	#if EV_USE_MONOTONIC
		1032	if (expect_true (have_monotonic))
		1033	{
		1034	if (time_update_monotonic (EV_A))
500	{	1035	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	1036	ev_tstamp odiff = rtmn_diff;
502		1037
503	if (fabs (diff) >= 1e-4)	1038	for (i = 4; --i; ) /* loop a few times, before making important decisions */
504	{	1039	{
505	evperiodic_stop (w);	1040	rtmn_diff = rt_now - mn_now;
506	evperiodic_start (w);
507		1041
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	1042	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		1043	return; /* all is well */
		1044
		1045	rt_now = ev_time ();
		1046	mn_now = get_clock ();
		1047	now_floor = mn_now;
509	}	1048	}
		1049
		1050	periodics_reschedule (EV_A);
		1051	/* no timer adjustment, as the monotonic clock doesn't jump */
		1052	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
510	}	1053	}
511	}	1054	}
512	}	1055	else
513		1056	#endif
514	static void	1057	{
515	time_update ()
516	{
517	int i;
518
519	ev_now = ev_time ();	1058	rt_now = ev_time ();
520		1059
521	if (have_monotonic)	1060	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
522	{
523	ev_tstamp odiff = diff;
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	1061	{
527	now = get_clock ();
528	diff = ev_now - now;
529
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)
531	return; /* all is well */
532
533	ev_now = ev_time ();
534	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}
539	else
540	{
541	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
542	{
543	periodics_reschedule (ev_now - now);	1062	periodics_reschedule (EV_A);
544		1063
545	/* adjust timers. this is easy, as the offset is the same for all */	1064	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	1065	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	1066	((WT)timers [i])->at += rt_now - mn_now;
548	}	1067	}
549		1068
550	now = ev_now;	1069	mn_now = rt_now;
551	}	1070	}
552	}	1071	}
553		1072
554	int ev_loop_done;	1073	void
		1074	ev_ref (EV_P)
		1075	{
		1076	++activecnt;
		1077	}
555		1078
		1079	void
		1080	ev_unref (EV_P)
		1081	{
		1082	--activecnt;
		1083	}
		1084
		1085	static int loop_done;
		1086
		1087	void
556	void ev_loop (int flags)	1088	ev_loop (EV_P_ int flags)
557	{	1089	{
558	double block;	1090	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	1091	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
560		1092
561	do	1093	do
562	{	1094	{
563	/* queue check watchers (and execute them) */	1095	/* queue check watchers (and execute them) */
564	if (checkcnt)	1096	if (expect_false (preparecnt))
565	{	1097	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1098	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	1099	call_pending (EV_A);
568	}	1100	}
569		1101
		1102	/* we might have forked, so reify kernel state if necessary */
		1103	if (expect_false (postfork))
		1104	loop_fork (EV_A);
		1105
570	/* update fd-related kernel structures */	1106	/* update fd-related kernel structures */
571	fd_reify ();	1107	fd_reify (EV_A);
572		1108
573	/* calculate blocking time */	1109	/* calculate blocking time */
574		1110
575	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1111	/* we only need this for !monotonic clock or timers, but as we basically
		1112	always have timers, we just calculate it always */
		1113	#if EV_USE_MONOTONIC
		1114	if (expect_true (have_monotonic))
		1115	time_update_monotonic (EV_A);
		1116	else
		1117	#endif
		1118	{
576	ev_now = ev_time ();	1119	rt_now = ev_time ();
		1120	mn_now = rt_now;
		1121	}
577		1122
578	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1123	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
579	block = 0.;	1124	block = 0.;
580	else	1125	else
581	{	1126	{
582	block = MAX_BLOCKTIME;	1127	block = MAX_BLOCKTIME;
583		1128
584	if (timercnt)	1129	if (timercnt)
585	{	1130	{
586	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1131	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
587	if (block > to) block = to;	1132	if (block > to) block = to;
588	}	1133	}
589		1134
590	if (periodiccnt)	1135	if (periodiccnt)
591	{	1136	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1137	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
593	if (block > to) block = to;	1138	if (block > to) block = to;
594	}	1139	}
595		1140
596	if (block < 0.) block = 0.;	1141	if (block < 0.) block = 0.;
597	}	1142	}
598		1143
599	method_poll (block);	1144	method_poll (EV_A_ block);
600		1145
601	/* update ev_now, do magic */	1146	/* update rt_now, do magic */
602	time_update ();	1147	time_update (EV_A);
603		1148
604	/* queue pending timers and reschedule them */	1149	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1150	timers_reify (EV_A); /* relative timers called last */
606	periodics_reify (); /* absolute timers called first */	1151	periodics_reify (EV_A); /* absolute timers called first */
607		1152
608	/* queue idle watchers unless io or timers are pending */	1153	/* queue idle watchers unless io or timers are pending */
609	if (!pendingcnt)	1154	if (idlecnt && !any_pending (EV_A))
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1155	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		1156
612	/* queue check watchers, to be executed first */	1157	/* queue check watchers, to be executed first */
613	if (checkcnt)	1158	if (checkcnt)
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1159	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1160
616	call_pending ();	1161	call_pending (EV_A);
617	}	1162	}
618	while (!ev_loop_done);	1163	while (activecnt && !loop_done);
619		1164
620	if (ev_loop_done != 2)	1165	if (loop_done != 2)
621	ev_loop_done = 0;	1166	loop_done = 0;
		1167	}
		1168
		1169	void
		1170	ev_unloop (EV_P_ int how)
		1171	{
		1172	loop_done = how;
622	}	1173	}
623		1174
624	/*****************************************************************************/	1175	/*****************************************************************************/
625		1176
626	static void	1177	inline void
627	wlist_add (WL *head, WL elem)	1178	wlist_add (WL *head, WL elem)
628	{	1179	{
629	elem->next = *head;	1180	elem->next = *head;
630	*head = elem;	1181	*head = elem;
631	}	1182	}
632		1183
633	static void	1184	inline void
634	wlist_del (WL *head, WL elem)	1185	wlist_del (WL *head, WL elem)
635	{	1186	{
636	while (*head)	1187	while (*head)
637	{	1188	{
638	if (*head == elem)	1189	if (*head == elem)
…		…
643		1194
644	head = &(*head)->next;	1195	head = &(*head)->next;
645	}	1196	}
646	}	1197	}
647		1198
648	static void	1199	inline void
649	ev_clear (W w)	1200	ev_clear_pending (EV_P_ W w)
650	{	1201	{
651	if (w->pending)	1202	if (w->pending)
652	{	1203	{
653	pendings [w->pending - 1].w = 0;	1204	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1205	w->pending = 0;
655	}	1206	}
656	}	1207	}
657		1208
658	static void	1209	inline void
659	ev_start (W w, int active)	1210	ev_start (EV_P_ W w, int active)
660	{	1211	{
		1212	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1213	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1214
661	w->active = active;	1215	w->active = active;
		1216	ev_ref (EV_A);
662	}	1217	}
663		1218
664	static void	1219	inline void
665	ev_stop (W w)	1220	ev_stop (EV_P_ W w)
666	{	1221	{
		1222	ev_unref (EV_A);
667	w->active = 0;	1223	w->active = 0;
668	}	1224	}
669		1225
670	/*****************************************************************************/	1226	/*****************************************************************************/
671		1227
672	void	1228	void
673	evio_start (struct ev_io *w)	1229	ev_io_start (EV_P_ struct ev_io *w)
674	{	1230	{
		1231	int fd = w->fd;
		1232
675	if (ev_is_active (w))	1233	if (ev_is_active (w))
676	return;	1234	return;
677		1235
678	int fd = w->fd;	1236	assert (("ev_io_start called with negative fd", fd >= 0));
679		1237
680	ev_start ((W)w, 1);	1238	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1239	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1240	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1241
684	++fdchangecnt;	1242	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1243	}
688		1244
689	void	1245	void
690	evio_stop (struct ev_io *w)	1246	ev_io_stop (EV_P_ struct ev_io *w)
691	{	1247	{
692	ev_clear ((W)w);	1248	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1249	if (!ev_is_active (w))
694	return;	1250	return;
695		1251
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1252	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1253	ev_stop (EV_A_ (W)w);
698		1254
699	++fdchangecnt;	1255	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1256	}
703		1257
704	void	1258	void
705	evtimer_start (struct ev_timer *w)	1259	ev_timer_start (EV_P_ struct ev_timer *w)
706	{	1260	{
707	if (ev_is_active (w))	1261	if (ev_is_active (w))
708	return;	1262	return;
709		1263
710	w->at += now;	1264	((WT)w)->at += mn_now;
711		1265
712	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1266	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
713		1267
714	ev_start ((W)w, ++timercnt);	1268	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1269	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
716	timers [timercnt - 1] = w;	1270	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1271	upheap ((WT *)timers, timercnt - 1);
718	}
719		1272
		1273	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1274	}
		1275
720	void	1276	void
721	evtimer_stop (struct ev_timer *w)	1277	ev_timer_stop (EV_P_ struct ev_timer *w)
722	{	1278	{
723	ev_clear ((W)w);	1279	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1280	if (!ev_is_active (w))
725	return;	1281	return;
726		1282
		1283	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1284
727	if (w->active < timercnt--)	1285	if (((W)w)->active < timercnt--)
728	{	1286	{
729	timers [w->active - 1] = timers [timercnt];	1287	timers [((W)w)->active - 1] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1288	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1289	}
732		1290
733	w->at = w->repeat;	1291	((WT)w)->at = w->repeat;
734		1292
735	ev_stop ((W)w);	1293	ev_stop (EV_A_ (W)w);
736	}	1294	}
737		1295
738	void	1296	void
739	evtimer_again (struct ev_timer *w)	1297	ev_timer_again (EV_P_ struct ev_timer *w)
740	{	1298	{
741	if (ev_is_active (w))	1299	if (ev_is_active (w))
742	{	1300	{
743	if (w->repeat)	1301	if (w->repeat)
744	{	1302	{
745	w->at = now + w->repeat;	1303	((WT)w)->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1304	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1305	}
748	else	1306	else
749	evtimer_stop (w);	1307	ev_timer_stop (EV_A_ w);
750	}	1308	}
751	else if (w->repeat)	1309	else if (w->repeat)
752	evtimer_start (w);	1310	ev_timer_start (EV_A_ w);
753	}	1311	}
754		1312
755	void	1313	void
756	evperiodic_start (struct ev_periodic *w)	1314	ev_periodic_start (EV_P_ struct ev_periodic *w)
757	{	1315	{
758	if (ev_is_active (w))	1316	if (ev_is_active (w))
759	return;	1317	return;
760		1318
761	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1319	if (w->reschedule_cb)
762		1320	((WT)w)->at = w->reschedule_cb (w, rt_now);
		1321	else if (w->interval)
		1322	{
		1323	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763	/* this formula differs from the one in periodic_reify because we do not always round up */	1324	/* this formula differs from the one in periodic_reify because we do not always round up */
764	if (w->interval)
765	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1325	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1326	}
766		1327
767	ev_start ((W)w, ++periodiccnt);	1328	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1329	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
769	periodics [periodiccnt - 1] = w;	1330	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1331	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1332
		1333	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1334	}
		1335
773	void	1336	void
774	evperiodic_stop (struct ev_periodic *w)	1337	ev_periodic_stop (EV_P_ struct ev_periodic *w)
775	{	1338	{
776	ev_clear ((W)w);	1339	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1340	if (!ev_is_active (w))
778	return;	1341	return;
779		1342
		1343	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1344
780	if (w->active < periodiccnt--)	1345	if (((W)w)->active < periodiccnt--)
781	{	1346	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1347	periodics [((W)w)->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1348	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
784	}	1349	}
785		1350
786	ev_stop ((W)w);	1351	ev_stop (EV_A_ (W)w);
787	}	1352	}
788		1353
789	void	1354	void
790	evsignal_start (struct ev_signal *w)	1355	ev_periodic_again (EV_P_ struct ev_periodic *w)
		1356	{
		1357	ev_periodic_stop (EV_A_ w);
		1358	ev_periodic_start (EV_A_ w);
		1359	}
		1360
		1361	void
		1362	ev_idle_start (EV_P_ struct ev_idle *w)
791	{	1363	{
792	if (ev_is_active (w))	1364	if (ev_is_active (w))
793	return;	1365	return;
794		1366
		1367	ev_start (EV_A_ (W)w, ++idlecnt);
		1368	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1369	idles [idlecnt - 1] = w;
		1370	}
		1371
		1372	void
		1373	ev_idle_stop (EV_P_ struct ev_idle *w)
		1374	{
		1375	ev_clear_pending (EV_A_ (W)w);
		1376	if (ev_is_active (w))
		1377	return;
		1378
		1379	idles [((W)w)->active - 1] = idles [--idlecnt];
		1380	ev_stop (EV_A_ (W)w);
		1381	}
		1382
		1383	void
		1384	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1385	{
		1386	if (ev_is_active (w))
		1387	return;
		1388
		1389	ev_start (EV_A_ (W)w, ++preparecnt);
		1390	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1391	prepares [preparecnt - 1] = w;
		1392	}
		1393
		1394	void
		1395	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1396	{
		1397	ev_clear_pending (EV_A_ (W)w);
		1398	if (ev_is_active (w))
		1399	return;
		1400
		1401	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1402	ev_stop (EV_A_ (W)w);
		1403	}
		1404
		1405	void
		1406	ev_check_start (EV_P_ struct ev_check *w)
		1407	{
		1408	if (ev_is_active (w))
		1409	return;
		1410
		1411	ev_start (EV_A_ (W)w, ++checkcnt);
		1412	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1413	checks [checkcnt - 1] = w;
		1414	}
		1415
		1416	void
		1417	ev_check_stop (EV_P_ struct ev_check *w)
		1418	{
		1419	ev_clear_pending (EV_A_ (W)w);
		1420	if (ev_is_active (w))
		1421	return;
		1422
		1423	checks [((W)w)->active - 1] = checks [--checkcnt];
		1424	ev_stop (EV_A_ (W)w);
		1425	}
		1426
		1427	#ifndef SA_RESTART
		1428	# define SA_RESTART 0
		1429	#endif
		1430
		1431	void
		1432	ev_signal_start (EV_P_ struct ev_signal *w)
		1433	{
		1434	#if EV_MULTIPLICITY
		1435	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1436	#endif
		1437	if (ev_is_active (w))
		1438	return;
		1439
		1440	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1441
795	ev_start ((W)w, 1);	1442	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1443	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1444	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1445
799	if (!w->next)	1446	if (!((WL)w)->next)
800	{	1447	{
		1448	#if WIN32
		1449	signal (w->signum, sighandler);
		1450	#else
801	struct sigaction sa;	1451	struct sigaction sa;
802	sa.sa_handler = sighandler;	1452	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1453	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1454	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1455	sigaction (w->signum, &sa, 0);
		1456	#endif
806	}	1457	}
807	}	1458	}
808		1459
809	void	1460	void
810	evsignal_stop (struct ev_signal *w)	1461	ev_signal_stop (EV_P_ struct ev_signal *w)
811	{	1462	{
812	ev_clear ((W)w);	1463	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1464	if (!ev_is_active (w))
814	return;	1465	return;
815		1466
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1467	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1468	ev_stop (EV_A_ (W)w);
818		1469
819	if (!signals [w->signum - 1].head)	1470	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1471	signal (w->signum, SIG_DFL);
821	}	1472	}
822		1473
823	void evidle_start (struct ev_idle *w)	1474	void
		1475	ev_child_start (EV_P_ struct ev_child *w)
824	{	1476	{
		1477	#if EV_MULTIPLICITY
		1478	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1479	#endif
825	if (ev_is_active (w))	1480	if (ev_is_active (w))
826	return;	1481	return;
827		1482
828	ev_start ((W)w, ++idlecnt);	1483	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1484	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1485	}
832		1486
833	void evidle_stop (struct ev_idle *w)	1487	void
		1488	ev_child_stop (EV_P_ struct ev_child *w)
834	{	1489	{
835	ev_clear ((W)w);	1490	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1491	if (ev_is_active (w))
837	return;	1492	return;
838		1493
839	idles [w->active - 1] = idles [--idlecnt];	1494	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1495	ev_stop (EV_A_ (W)w);
841	}
842
843	void evprepare_start (struct ev_prepare *w)
844	{
845	if (ev_is_active (w))
846	return;
847
848	ev_start ((W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );
850	prepares [preparecnt - 1] = w;
851	}
852
853	void evprepare_stop (struct ev_prepare *w)
854	{
855	ev_clear ((W)w);
856	if (ev_is_active (w))
857	return;
858
859	prepares [w->active - 1] = prepares [--preparecnt];
860	ev_stop ((W)w);
861	}
862
863	void evcheck_start (struct ev_check *w)
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );
870	checks [checkcnt - 1] = w;
871	}
872
873	void evcheck_stop (struct ev_check *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	checks [w->active - 1] = checks [--checkcnt];
880	ev_stop ((W)w);
881	}	1496	}
882		1497
883	/*****************************************************************************/	1498	/*****************************************************************************/
884		1499
885	struct ev_once	1500	struct ev_once
…		…
889	void (cb)(int revents, void arg);	1504	void (cb)(int revents, void arg);
890	void *arg;	1505	void *arg;
891	};	1506	};
892		1507
893	static void	1508	static void
894	once_cb (struct ev_once *once, int revents)	1509	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1510	{
896	void (cb)(int revents, void arg) = once->cb;	1511	void (cb)(int revents, void arg) = once->cb;
897	void *arg = once->arg;	1512	void *arg = once->arg;
898		1513
899	evio_stop (&once->io);	1514	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1515	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1516	ev_free (once);
902		1517
903	cb (revents, arg);	1518	cb (revents, arg);
904	}	1519	}
905		1520
906	static void	1521	static void
907	once_cb_io (struct ev_io *w, int revents)	1522	once_cb_io (EV_P_ struct ev_io *w, int revents)
908	{	1523	{
909	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1524	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
910	}	1525	}
911		1526
912	static void	1527	static void
913	once_cb_to (struct ev_timer *w, int revents)	1528	once_cb_to (EV_P_ struct ev_timer *w, int revents)
914	{	1529	{
915	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1530	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
916	}	1531	}
917		1532
918	void	1533	void
919	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1534	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
920	{	1535	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1536	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
922		1537
923	if (!once)	1538	if (!once)
924	cb (EV_ERROR, arg);	1539	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
925	else	1540	else
926	{	1541	{
927	once->cb = cb;	1542	once->cb = cb;
928	once->arg = arg;	1543	once->arg = arg;
929		1544
930	evw_init (&once->io, once_cb_io);	1545	ev_watcher_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1546	if (fd >= 0)
933	{	1547	{
934	evio_set (&once->io, fd, events);	1548	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1549	ev_io_start (EV_A_ &once->io);
936	}	1550	}
937		1551
938	evw_init (&once->to, once_cb_to);	1552	ev_watcher_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1553	if (timeout >= 0.)
941	{	1554	{
942	evtimer_set (&once->to, timeout, 0.);	1555	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1556	ev_timer_start (EV_A_ &once->to);
944	}	1557	}
945	}	1558	}
946	}	1559	}
947		1560
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}
1025
1026	#endif
1027
1028
1029
1030

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Comparing libev/ev.c (file contents): Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs. Revision 1.78 by root, Thu Nov 8 21:08:56 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.78 by root, Thu Nov 8 21:08:56 2007 UTC