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

Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
36		63
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
41	#include <sys/time.h>	72	#include <sys/time.h>
42	#include <time.h>	73	#include <time.h>
43		74
44	#define HAVE_EPOLL 1	75	/**/
45		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
49	# endif	102	# endif
50	#endif	103	#endif
51		104
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
63		122
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
66		127
67	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
68		143
69	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
72		147
73	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
74	ev_tstamp ev_now;
75	int ev_method;
76		149
77	static int have_monotonic; /* runtime */	150	#if WIN32
78		151	/* note: the comment below could not be substantiated, but what would I care */
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
80	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
81	static void (*method_poll)(ev_tstamp timeout);	154	#endif
82		155
83	/*****************************************************************************/	156	/*****************************************************************************/
84		157
85	ev_tstamp	158	typedef struct
		159	{
		160	struct ev_watcher_list *head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
		164
		165	typedef struct
		166	{
		167	W w;
		168	int events;
		169	} ANPENDING;
		170
		171	#if EV_MULTIPLICITY
		172
		173	struct ev_loop
		174	{
		175	# define VAR(name,decl) decl;
		176	# include "ev_vars.h"
		177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
		180
		181	#else
		182
		183	# define VAR(name,decl) static decl;
		184	# include "ev_vars.h"
		185	# undef VAR
		186
		187	#endif
		188
		189	/*****************************************************************************/
		190
		191	inline ev_tstamp
86	ev_time (void)	192	ev_time (void)
87	{	193	{
88	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
89	struct timespec ts;	195	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	198	#else
93	struct timeval tv;	199	struct timeval tv;
94	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	202	#endif
97	}	203	}
98		204
99	static ev_tstamp	205	inline ev_tstamp
100	get_clock (void)	206	get_clock (void)
101	{	207	{
102	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
103	if (have_monotonic)	209	if (expect_true (have_monotonic))
104	{	210	{
105	struct timespec ts;	211	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	214	}
109	#endif	215	#endif
110		216
111	return ev_time ();	217	return ev_time ();
112	}	218	}
113		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		227
114	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
115	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
116	{ \	230	{ \
117	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
		232	do \
		233	{ \
		234	newcnt = array_roundsize (base, newcnt << 1); \
		235	} \
		236	while ((cnt) > newcnt); \
		237	\
118	base = realloc (base, sizeof (base) (newcnt)); \	238	base = realloc (base, sizeof (base) (newcnt)); \
119	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	240	cur = newcnt; \
121	}	241	}
122		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (base) (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
123	/*****************************************************************************/	254	/*****************************************************************************/
124		255
125	typedef struct
126	{
127	struct ev_io *head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void	256	static void
138	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
139	{	258	{
140	while (count--)	259	while (count--)
141	{	260	{
142	base->head = 0;	261	base->head = 0;
143	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
144	++base;	265	++base;
145	}	266	}
146	}	267	}
147		268
148	typedef struct
149	{
150	W w;
151	int events;
152	} ANPENDING;
153
154	static ANPENDING *pendings;
155	static int pendingmax, pendingcnt;
156
157	static void	269	static void
158	event (W w, int events)	270	event (EV_P_ W w, int events)
159	{	271	{
160	if (w->active)	272	if (w->pending)
161	{	273	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	274	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		275	return;
166	}	276	}
167	}
168		277
		278	w->pending = ++pendingcnt [ABSPRI (w)];
		279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		280	pendings [ABSPRI (w)][w->pending - 1].w = w;
		281	pendings [ABSPRI (w)][w->pending - 1].events = events;
		282	}
		283
169	static void	284	static void
		285	queue_events (EV_P_ W *events, int eventcnt, int type)
		286	{
		287	int i;
		288
		289	for (i = 0; i < eventcnt; ++i)
		290	event (EV_A_ events [i], type);
		291	}
		292
		293	static void
170	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
171	{	295	{
172	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	297	struct ev_io *w;
174		298
175	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
176	{	300	{
177	int ev = w->events & events;	301	int ev = w->events & events;
178		302
179	if (ev)	303	if (ev)
180	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
181	}	305	}
182	}	306	}
183		307
		308	/*****************************************************************************/
		309
184	static void	310	static void
185	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
186	{	312	{
187	int i;	313	int i;
188		314
189	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	316	{
		317	int fd = fdchanges [i];
		318	ANFD *anfd = anfds + fd;
		319	struct ev_io *w;
		320
		321	int events = 0;
		322
		323	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		324	events \|= w->events;
		325
		326	anfd->reify = 0;
		327
		328	method_modify (EV_A_ fd, anfd->events, events);
		329	anfd->events = events;
		330	}
		331
		332	fdchangecnt = 0;
		333	}
		334
		335	static void
		336	fd_change (EV_P_ int fd)
		337	{
		338	if (anfds [fd].reify \|\| fdchangecnt < 0)
		339	return;
		340
		341	anfds [fd].reify = 1;
		342
		343	++fdchangecnt;
		344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		345	fdchanges [fdchangecnt - 1] = fd;
		346	}
		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		357	}
		358	}
		359
		360	/* called on EBADF to verify fds */
		361	static void
		362	fd_ebadf (EV_P)
		363	{
		364	int fd;
		365
		366	for (fd = 0; fd < anfdmax; ++fd)
		367	if (anfds [fd].events)
		368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		369	fd_kill (EV_A_ fd);
		370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
		380	{
		381	close (fd);
		382	fd_kill (EV_A_ fd);
		383	return;
		384	}
		385	}
		386
		387	/* susually called after fork if method needs to re-arm all fds from scratch */
		388	static void
		389	fd_rearm_all (EV_P)
		390	{
		391	int fd;
		392
		393	/* this should be highly optimised to not do anything but set a flag */
		394	for (fd = 0; fd < anfdmax; ++fd)
		395	if (anfds [fd].events)
		396	{
		397	anfds [fd].events = 0;
		398	fd_change (EV_A_ fd);
		399	}
191	}	400	}
192		401
193	/*****************************************************************************/	402	/*****************************************************************************/
194		403
195	static struct ev_timer **timers;
196	static int timermax, timercnt;
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void	404	static void
202	upheap (WT *timers, int k)	405	upheap (WT *heap, int k)
203	{	406	{
204	WT w = timers [k];	407	WT w = heap [k];
205		408
206	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
207	{	410	{
208	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
210	k >>= 1;	413	k >>= 1;
211	}	414	}
212		415
213	timers [k] = w;	416	heap [k] = w;
214	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
215		418
216	}	419	}
217		420
218	static void	421	static void
219	downheap (WT *timers, int N, int k)	422	downheap (WT *heap, int N, int k)
220	{	423	{
221	WT w = timers [k];	424	WT w = heap [k];
222		425
223	while (k < (N >> 1))	426	while (k < (N >> 1))
224	{	427	{
225	int j = k << 1;	428	int j = k << 1;
226		429
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	431	++j;
229		432
230	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
231	break;	434	break;
232		435
233	timers [k] = timers [j];	436	heap [k] = heap [j];
234	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
235	k = j;	438	k = j;
236	}	439	}
237		440
238	timers [k] = w;	441	heap [k] = w;
239	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
240	}	443	}
241		444
242	/*****************************************************************************/	445	/*****************************************************************************/
243		446
244	typedef struct	447	typedef struct
245	{	448	{
246	struct ev_signal *head;	449	struct ev_watcher_list *head;
247	sig_atomic_t gotsig;	450	sig_atomic_t volatile gotsig;
248	} ANSIG;	451	} ANSIG;
249		452
250	static ANSIG *signals;	453	static ANSIG *signals;
251	static int signalmax;	454	static int signalmax;
252		455
253	static int sigpipe [2];	456	static int sigpipe [2];
254	static sig_atomic_t gotsig;	457	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	458	static struct ev_io sigev;
256		459
257	static void	460	static void
258	signals_init (ANSIG *base, int count)	461	signals_init (ANSIG *base, int count)
259	{	462	{
260	while (count--)	463	while (count--)
261	{	464	{
262	base->head = 0;	465	base->head = 0;
263	base->gotsig = 0;	466	base->gotsig = 0;
		467
264	++base;	468	++base;
265	}	469	}
266	}	470	}
267		471
268	static void	472	static void
269	sighandler (int signum)	473	sighandler (int signum)
270	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
271	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
272		480
273	if (!gotsig)	481	if (!gotsig)
274	{	482	{
		483	int old_errno = errno;
275	gotsig = 1;	484	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);	485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
277	}	487	}
278	}	488	}
279		489
280	static void	490	static void
281	sigcb (struct ev_io *iow, int revents)	491	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	492	{
283	struct ev_signal *w;	493	struct ev_watcher_list *w;
284	int sig;	494	int signum;
285		495
		496	read (sigpipe [0], &revents, 1);
286	gotsig = 0;	497	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		498
289	for (sig = signalmax; sig--; )	499	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	500	if (signals [signum].gotsig)
291	{	501	{
292	signals [sig].gotsig = 0;	502	signals [signum].gotsig = 0;
293		503
294	for (w = signals [sig].head; w; w = w->next)	504	for (w = signals [signum].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);	505	event (EV_A_ (W)w, EV_SIGNAL);
296	}	506	}
297	}	507	}
298		508
299	static void	509	static void
300	siginit (void)	510	siginit (EV_P)
301	{	511	{
		512	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		515
305	/* rather than sort out wether we really need nb, set it */	516	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
308		520
309	evio_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	524	}
312		525
313	/*****************************************************************************/	526	/*****************************************************************************/
314		527
315	static struct ev_idle **idles;	528	#ifndef WIN32
316	static int idlemax, idlecnt;
317		529
318	static struct ev_check **checks;	530	static struct ev_child *childs [PID_HASHSIZE];
319	static int checkmax, checkcnt;	531	static struct ev_signal childev;
		532
		533	#ifndef WCONTINUED
		534	# define WCONTINUED 0
		535	#endif
		536
		537	static void
		538	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		539	{
		540	struct ev_child *w;
		541
		542	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		543	if (w->pid == pid \|\| !w->pid)
		544	{
		545	ev_priority (w) = ev_priority (sw); /* need to do it now */
		546	w->rpid = pid;
		547	w->rstatus = status;
		548	event (EV_A_ (W)w, EV_CHILD);
		549	}
		550	}
		551
		552	static void
		553	childcb (EV_P_ struct ev_signal *sw, int revents)
		554	{
		555	int pid, status;
		556
		557	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		558	{
		559	/* make sure we are called again until all childs have been reaped */
		560	event (EV_A_ (W)sw, EV_SIGNAL);
		561
		562	child_reap (EV_A_ sw, pid, pid, status);
		563	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		564	}
		565	}
		566
		567	#endif
320		568
321	/*****************************************************************************/	569	/*****************************************************************************/
322		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
323	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	575	# include "ev_epoll.c"
325	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
326	#if HAVE_SELECT	580	#if EV_USE_SELECT
327	# include "ev_select.c"	581	# include "ev_select.c"
328	#endif	582	#endif
329		583
330	int ev_init (int flags)	584	int
		585	ev_version_major (void)
331	{	586	{
		587	return EV_VERSION_MAJOR;
		588	}
		589
		590	int
		591	ev_version_minor (void)
		592	{
		593	return EV_VERSION_MINOR;
		594	}
		595
		596	/* return true if we are running with elevated privileges and should ignore env variables */
		597	static int
		598	enable_secure (void)
		599	{
		600	#ifdef WIN32
		601	return 0;
		602	#else
		603	return getuid () != geteuid ()
		604	\|\| getgid () != getegid ();
		605	#endif
		606	}
		607
		608	int
		609	ev_method (EV_P)
		610	{
		611	return method;
		612	}
		613
		614	static void
		615	loop_init (EV_P_ int methods)
		616	{
		617	if (!method)
		618	{
332	#if HAVE_MONOTONIC	619	#if EV_USE_MONOTONIC
333	{	620	{
334	struct timespec ts;	621	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	623	have_monotonic = 1;
337	}	624	}
338	#endif	625	#endif
339		626
340	ev_now = ev_time ();	627	rt_now = ev_time ();
341	now = get_clock ();	628	mn_now = get_clock ();
342	diff = ev_now - now;	629	now_floor = mn_now;
		630	rtmn_diff = rt_now - mn_now;
343		631
		632	if (methods == EVMETHOD_AUTO)
		633	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		634	methods = atoi (getenv ("LIBEV_METHODS"));
		635	else
		636	methods = EVMETHOD_ANY;
		637
		638	method = 0;
		639	#if EV_USE_WIN32
		640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		647	#endif
		648	#if EV_USE_POLL
		649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		653	#endif
		654	}
		655	}
		656
		657	void
		658	loop_destroy (EV_P)
		659	{
		660	int i;
		661
		662	#if EV_USE_WIN32
		663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		664	#endif
		665	#if EV_USE_KQUEUE
		666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		667	#endif
		668	#if EV_USE_EPOLL
		669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		670	#endif
		671	#if EV_USE_POLL
		672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		673	#endif
		674	#if EV_USE_SELECT
		675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		676	#endif
		677
		678	for (i = NUMPRI; i--; )
		679	array_free (pending, [i]);
		680
		681	array_free (fdchange, );
		682	array_free (timer, );
		683	array_free (periodic, );
		684	array_free (idle, );
		685	array_free (prepare, );
		686	array_free (check, );
		687
		688	method = 0;
		689	/TODO/
		690	}
		691
		692	void
		693	loop_fork (EV_P)
		694	{
		695	/TODO/
		696	#if EV_USE_EPOLL
		697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		698	#endif
		699	#if EV_USE_KQUEUE
		700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		701	#endif
		702	}
		703
		704	#if EV_MULTIPLICITY
		705	struct ev_loop *
		706	ev_loop_new (int methods)
		707	{
		708	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		709
		710	loop_init (EV_A_ methods);
		711
		712	if (ev_method (EV_A))
		713	return loop;
		714
		715	return 0;
		716	}
		717
		718	void
		719	ev_loop_destroy (EV_P)
		720	{
		721	loop_destroy (EV_A);
		722	free (loop);
		723	}
		724
		725	void
		726	ev_loop_fork (EV_P)
		727	{
		728	loop_fork (EV_A);
		729	}
		730
		731	#endif
		732
		733	#if EV_MULTIPLICITY
		734	struct ev_loop default_loop_struct;
		735	static struct ev_loop *default_loop;
		736
		737	struct ev_loop *
		738	#else
		739	static int default_loop;
		740
		741	int
		742	#endif
		743	ev_default_loop (int methods)
		744	{
		745	if (sigpipe [0] == sigpipe [1])
344	if (pipe (sigpipe))	746	if (pipe (sigpipe))
345	return 0;	747	return 0;
346		748
347	ev_method = EVMETHOD_NONE;	749	if (!default_loop)
348	#if HAVE_EPOLL
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354
355	if (ev_method)
356	{	750	{
		751	#if EV_MULTIPLICITY
		752	struct ev_loop *loop = default_loop = &default_loop_struct;
		753	#else
		754	default_loop = 1;
		755	#endif
		756
		757	loop_init (EV_A_ methods);
		758
		759	if (ev_method (EV_A))
		760	{
357	evw_init (&sigev, sigcb);	761	ev_watcher_init (&sigev, sigcb);
		762	ev_set_priority (&sigev, EV_MAXPRI);
358	siginit ();	763	siginit (EV_A);
359	}
360		764
361	return ev_method;	765	#ifndef WIN32
362	}	766	ev_signal_init (&childev, childcb, SIGCHLD);
363		767	ev_set_priority (&childev, EV_MAXPRI);
364	/*****************************************************************************/	768	ev_signal_start (EV_A_ &childev);
365		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
366	void ev_prefork (void)
367	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif	770	#endif
		771	}
		772	else
		773	default_loop = 0;
		774	}
382		775
		776	return default_loop;
		777	}
		778
		779	void
		780	ev_default_destroy (void)
		781	{
		782	#if EV_MULTIPLICITY
		783	struct ev_loop *loop = default_loop;
		784	#endif
		785
		786	ev_ref (EV_A); /* child watcher */
		787	ev_signal_stop (EV_A_ &childev);
		788
		789	ev_ref (EV_A); /* signal watcher */
383	evio_stop (&sigev);	790	ev_io_stop (EV_A_ &sigev);
		791
		792	close (sigpipe [0]); sigpipe [0] = 0;
		793	close (sigpipe [1]); sigpipe [1] = 0;
		794
		795	loop_destroy (EV_A);
		796	}
		797
		798	void
		799	ev_default_fork (void)
		800	{
		801	#if EV_MULTIPLICITY
		802	struct ev_loop *loop = default_loop;
		803	#endif
		804
		805	loop_fork (EV_A);
		806
		807	ev_io_stop (EV_A_ &sigev);
384	close (sigpipe [0]);	808	close (sigpipe [0]);
385	close (sigpipe [1]);	809	close (sigpipe [1]);
386	pipe (sigpipe);	810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
387	siginit ();	813	siginit (EV_A);
388	}	814	}
389		815
390	/*****************************************************************************/	816	/*****************************************************************************/
391		817
392	static void	818	static void
393	fd_reify (void)	819	call_pending (EV_P)
394	{	820	{
395	int i;	821	int pri;
396		822
397	for (i = 0; i < fdchangecnt; ++i)	823	for (pri = NUMPRI; pri--; )
398	{	824	while (pendingcnt [pri])
399	int fd = fdchanges [i];
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402
403	int wev = 0;
404
405	for (w = anfd->head; w; w = w->next)
406	wev \|= w->events;
407
408	if (anfd->wev != wev)
409	{	825	{
410	method_modify (fd, anfd->wev, wev);	826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
411	anfd->wev = wev;
412	}
413	}
414		827
415	fdchangecnt = 0;
416	}
417
418	static void
419	call_pending ()
420	{
421	int i;
422
423	for (i = 0; i < pendingcnt; ++i)
424	{
425	ANPENDING *p = pendings + i;
426
427	if (p->w)	828	if (p->w)
428	{	829	{
429	p->w->pending = 0;	830	p->w->pending = 0;
430	p->w->cb (p->w, p->events);	831	p->w->cb (EV_A_ p->w, p->events);
431	}	832	}
432	}	833	}
433
434	pendingcnt = 0;
435	}	834	}
436		835
437	static void	836	static void
438	timers_reify ()	837	timers_reify (EV_P)
439	{	838	{
440	while (timercnt && timers [0]->at <= now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
441	{	840	{
442	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
443		842
444	event ((W)w, EV_TIMEOUT);	843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
445		844
446	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
447	if (w->repeat)	846	if (w->repeat)
448	{	847	{
		848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
449	w->at = now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
450	assert (("timer timeout in the past, negative repeat?", w->at > now));
451	downheap ((WT *)timers, timercnt, 0);	850	downheap ((WT *)timers, timercnt, 0);
452	}	851	}
453	else	852	else
454	evtimer_stop (w); /* nonrepeating: stop timer */	853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455	}
456	}
457		854
		855	event (EV_A_ (W)w, EV_TIMEOUT);
		856	}
		857	}
		858
458	static void	859	static void
459	periodics_reify ()	860	periodics_reify (EV_P)
460	{	861	{
461	while (periodiccnt && periodics [0]->at <= ev_now)	862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
462	{	863	{
463	struct ev_periodic *w = periodics [0];	864	struct ev_periodic *w = periodics [0];
		865
		866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
464		867
465	/* first reschedule or stop timer */	868	/* first reschedule or stop timer */
466	if (w->interval)	869	if (w->interval)
467	{	870	{
468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
469	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
470	downheap ((WT *)periodics, periodiccnt, 0);	873	downheap ((WT *)periodics, periodiccnt, 0);
471	}	874	}
472	else	875	else
473	evperiodic_stop (w); /* nonrepeating: stop timer */	876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474		877
475	event ((W)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
476	}	879	}
477	}	880	}
478		881
479	static void	882	static void
480	periodics_reschedule (ev_tstamp diff)	883	periodics_reschedule (EV_P)
481	{	884	{
482	int i;	885	int i;
483		886
484	/* adjust periodics after time jump */	887	/* adjust periodics after time jump */
485	for (i = 0; i < periodiccnt; ++i)	888	for (i = 0; i < periodiccnt; ++i)
486	{	889	{
487	struct ev_periodic *w = periodics [i];	890	struct ev_periodic *w = periodics [i];
488		891
489	if (w->interval)	892	if (w->interval)
490	{	893	{
491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
492		895
493	if (fabs (diff) >= 1e-4)	896	if (fabs (diff) >= 1e-4)
494	{	897	{
495	evperiodic_stop (w);	898	ev_periodic_stop (EV_A_ w);
496	evperiodic_start (w);	899	ev_periodic_start (EV_A_ w);
497		900
498	i = 0; /* restart loop, inefficient, but time jumps should be rare */	901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
499	}	902	}
500	}	903	}
501	}	904	}
502	}	905	}
503		906
		907	inline int
		908	time_update_monotonic (EV_P)
		909	{
		910	mn_now = get_clock ();
		911
		912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		913	{
		914	rt_now = rtmn_diff + mn_now;
		915	return 0;
		916	}
		917	else
		918	{
		919	now_floor = mn_now;
		920	rt_now = ev_time ();
		921	return 1;
		922	}
		923	}
		924
504	static void	925	static void
505	time_update ()	926	time_update (EV_P)
506	{	927	{
507	int i;	928	int i;
508		929
509	ev_now = ev_time ();	930	#if EV_USE_MONOTONIC
510
511	if (have_monotonic)	931	if (expect_true (have_monotonic))
512	{	932	{
513	ev_tstamp odiff = diff;	933	if (time_update_monotonic (EV_A))
514
515	for (i = 4; --i; ) /* loop a few times, before making important decisions */
516	{	934	{
517	now = get_clock ();	935	ev_tstamp odiff = rtmn_diff;
		936
		937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		938	{
518	diff = ev_now - now;	939	rtmn_diff = rt_now - mn_now;
519		940
520	if (fabs (odiff - diff) < MIN_TIMEJUMP)	941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
521	return; /* all is well */	942	return; /* all is well */
522		943
523	ev_now = ev_time ();	944	rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	}
		948
		949	periodics_reschedule (EV_A);
		950	/* no timer adjustment, as the monotonic clock doesn't jump */
		951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
524	}	952	}
525
526	periodics_reschedule (diff - odiff);
527	/* no timer adjustment, as the monotonic clock doesn't jump */
528	}	953	}
529	else	954	else
		955	#endif
530	{	956	{
531	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	957	rt_now = ev_time ();
		958
		959	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
532	{	960	{
533	periodics_reschedule (ev_now - now);	961	periodics_reschedule (EV_A);
534		962
535	/* adjust timers. this is easy, as the offset is the same for all */	963	/* adjust timers. this is easy, as the offset is the same for all */
536	for (i = 0; i < timercnt; ++i)	964	for (i = 0; i < timercnt; ++i)
537	timers [i]->at += diff;	965	((WT)timers [i])->at += rt_now - mn_now;
538	}	966	}
539		967
540	now = ev_now;	968	mn_now = rt_now;
541	}	969	}
542	}	970	}
543		971
544	int ev_loop_done;	972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
545		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
546	void ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
547	{	988	{
548	double block;	989	double block;
549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	990	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
550
551	if (checkcnt)
552	{
553	queue_events ((W *)checks, checkcnt, EV_CHECK);
554	call_pending ();
555	}
556		991
557	do	992	do
558	{	993	{
		994	/* queue check watchers (and execute them) */
		995	if (expect_false (preparecnt))
		996	{
		997	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		998	call_pending (EV_A);
		999	}
		1000
559	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
560	fd_reify ();	1002	fd_reify (EV_A);
561		1003
562	/* calculate blocking time */	1004	/* calculate blocking time */
563		1005
564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1006	/* we only need this for !monotonic clockor timers, but as we basically
		1007	always have timers, we just calculate it always */
		1008	#if EV_USE_MONOTONIC
		1009	if (expect_true (have_monotonic))
		1010	time_update_monotonic (EV_A);
		1011	else
		1012	#endif
		1013	{
565	ev_now = ev_time ();	1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
566		1017
567	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1018	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
568	block = 0.;	1019	block = 0.;
569	else	1020	else
570	{	1021	{
571	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
572		1023
573	if (timercnt)	1024	if (timercnt)
574	{	1025	{
575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
576	if (block > to) block = to;	1027	if (block > to) block = to;
577	}	1028	}
578		1029
579	if (periodiccnt)	1030	if (periodiccnt)
580	{	1031	{
581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
582	if (block > to) block = to;	1033	if (block > to) block = to;
583	}	1034	}
584		1035
585	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
586	}	1037	}
587		1038
588	method_poll (block);	1039	method_poll (EV_A_ block);
589		1040
590	/* update ev_now, do magic */	1041	/* update rt_now, do magic */
591	time_update ();	1042	time_update (EV_A);
592		1043
593	/* queue pending timers and reschedule them */	1044	/* queue pending timers and reschedule them */
		1045	timers_reify (EV_A); /* relative timers called last */
594	periodics_reify (); /* absolute timers first */	1046	periodics_reify (EV_A); /* absolute timers called first */
595	timers_reify (); /* relative timers second */
596		1047
597	/* queue idle watchers unless io or timers are pending */	1048	/* queue idle watchers unless io or timers are pending */
598	if (!pendingcnt)	1049	if (!pendingcnt)
599	queue_events ((W *)idles, idlecnt, EV_IDLE);	1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
600		1051
601	/* queue check and possibly idle watchers */	1052	/* queue check watchers, to be executed first */
		1053	if (checkcnt)
602	queue_events ((W *)checks, checkcnt, EV_CHECK);	1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603		1055
604	call_pending ();	1056	call_pending (EV_A);
605	}	1057	}
606	while (!ev_loop_done);	1058	while (activecnt && !loop_done);
607		1059
608	if (ev_loop_done != 2)	1060	if (loop_done != 2)
609	ev_loop_done = 0;	1061	loop_done = 0;
		1062	}
		1063
		1064	void
		1065	ev_unloop (EV_P_ int how)
		1066	{
		1067	loop_done = how;
610	}	1068	}
611		1069
612	/*****************************************************************************/	1070	/*****************************************************************************/
613		1071
614	static void	1072	inline void
615	wlist_add (WL *head, WL elem)	1073	wlist_add (WL *head, WL elem)
616	{	1074	{
617	elem->next = *head;	1075	elem->next = *head;
618	*head = elem;	1076	*head = elem;
619	}	1077	}
620		1078
621	static void	1079	inline void
622	wlist_del (WL *head, WL elem)	1080	wlist_del (WL *head, WL elem)
623	{	1081	{
624	while (*head)	1082	while (*head)
625	{	1083	{
626	if (*head == elem)	1084	if (*head == elem)
…		…
631		1089
632	head = &(*head)->next;	1090	head = &(*head)->next;
633	}	1091	}
634	}	1092	}
635		1093
636	static void	1094	inline void
637	ev_clear (W w)	1095	ev_clear_pending (EV_P_ W w)
638	{	1096	{
639	if (w->pending)	1097	if (w->pending)
640	{	1098	{
641	pendings [w->pending - 1].w = 0;	1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;
642	w->pending = 0;	1100	w->pending = 0;
643	}	1101	}
644	}	1102	}
645		1103
646	static void	1104	inline void
647	ev_start (W w, int active)	1105	ev_start (EV_P_ W w, int active)
648	{	1106	{
		1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1109
649	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
650	}	1112	}
651		1113
652	static void	1114	inline void
653	ev_stop (W w)	1115	ev_stop (EV_P_ W w)
654	{	1116	{
		1117	ev_unref (EV_A);
655	w->active = 0;	1118	w->active = 0;
656	}	1119	}
657		1120
658	/*****************************************************************************/	1121	/*****************************************************************************/
659		1122
660	void	1123	void
661	evio_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
662	{	1125	{
		1126	int fd = w->fd;
		1127
663	if (ev_is_active (w))	1128	if (ev_is_active (w))
664	return;	1129	return;
665		1130
666	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
667		1132
668	ev_start ((W)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
670	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
671		1136
672	++fdchangecnt;	1137	fd_change (EV_A_ fd);
673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674	fdchanges [fdchangecnt - 1] = fd;
675	}	1138	}
676		1139
677	void	1140	void
678	evio_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
679	{	1142	{
680	ev_clear ((W)w);	1143	ev_clear_pending (EV_A_ (W)w);
681	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
682	return;	1145	return;
683		1146
684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685	ev_stop ((W)w);	1148	ev_stop (EV_A_ (W)w);
686		1149
687	++fdchangecnt;	1150	fd_change (EV_A_ w->fd);
688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689	fdchanges [fdchangecnt - 1] = w->fd;
690	}	1151	}
691		1152
692	void	1153	void
693	evtimer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
694	{	1155	{
695	if (ev_is_active (w))	1156	if (ev_is_active (w))
696	return;	1157	return;
697		1158
698	w->at += now;	1159	((WT)w)->at += mn_now;
699		1160
700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701		1162
702	ev_start ((W)w, ++timercnt);	1163	ev_start (EV_A_ (W)w, ++timercnt);
703	array_needsize (timers, timermax, timercnt, );	1164	array_needsize (timers, timermax, timercnt, );
704	timers [timercnt - 1] = w;	1165	timers [timercnt - 1] = w;
705	upheap ((WT *)timers, timercnt - 1);	1166	upheap ((WT *)timers, timercnt - 1);
706	}
707		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
708	void	1171	void
709	evtimer_stop (struct ev_timer *w)	1172	ev_timer_stop (EV_P_ struct ev_timer *w)
710	{	1173	{
711	ev_clear ((W)w);	1174	ev_clear_pending (EV_A_ (W)w);
712	if (!ev_is_active (w))	1175	if (!ev_is_active (w))
713	return;	1176	return;
714		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
715	if (w->active < timercnt--)	1180	if (((W)w)->active < timercnt--)
716	{	1181	{
717	timers [w->active - 1] = timers [timercnt];	1182	timers [((W)w)->active - 1] = timers [timercnt];
718	downheap ((WT *)timers, timercnt, w->active - 1);	1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
719	}	1184	}
720		1185
721	w->at = w->repeat;	1186	((WT)w)->at = w->repeat;
722		1187
723	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
724	}	1189	}
725		1190
726	void	1191	void
727	evtimer_again (struct ev_timer *w)	1192	ev_timer_again (EV_P_ struct ev_timer *w)
728	{	1193	{
729	if (ev_is_active (w))	1194	if (ev_is_active (w))
730	{	1195	{
731	if (w->repeat)	1196	if (w->repeat)
732	{	1197	{
733	w->at = now + w->repeat;	1198	((WT)w)->at = mn_now + w->repeat;
734	downheap ((WT *)timers, timercnt, w->active - 1);	1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
735	}	1200	}
736	else	1201	else
737	evtimer_stop (w);	1202	ev_timer_stop (EV_A_ w);
738	}	1203	}
739	else if (w->repeat)	1204	else if (w->repeat)
740	evtimer_start (w);	1205	ev_timer_start (EV_A_ w);
741	}	1206	}
742		1207
743	void	1208	void
744	evperiodic_start (struct ev_periodic *w)	1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
745	{	1210	{
746	if (ev_is_active (w))	1211	if (ev_is_active (w))
747	return;	1212	return;
748		1213
749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
750		1215
751	/* this formula differs from the one in periodic_reify because we do not always round up */	1216	/* this formula differs from the one in periodic_reify because we do not always round up */
752	if (w->interval)	1217	if (w->interval)
753	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
754		1219
755	ev_start ((W)w, ++periodiccnt);	1220	ev_start (EV_A_ (W)w, ++periodiccnt);
756	array_needsize (periodics, periodicmax, periodiccnt, );	1221	array_needsize (periodics, periodicmax, periodiccnt, );
757	periodics [periodiccnt - 1] = w;	1222	periodics [periodiccnt - 1] = w;
758	upheap ((WT *)periodics, periodiccnt - 1);	1223	upheap ((WT *)periodics, periodiccnt - 1);
759	}
760		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1226	}
		1227
761	void	1228	void
762	evperiodic_stop (struct ev_periodic *w)	1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
763	{	1230	{
764	ev_clear ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
765	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
766	return;	1233	return;
767		1234
		1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1236
768	if (w->active < periodiccnt--)	1237	if (((W)w)->active < periodiccnt--)
769	{	1238	{
770	periodics [w->active - 1] = periodics [periodiccnt];	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
771	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
772	}	1241	}
773		1242
774	ev_stop ((W)w);	1243	ev_stop (EV_A_ (W)w);
775	}	1244	}
776		1245
777	void	1246	void
778	evsignal_start (struct ev_signal *w)	1247	ev_idle_start (EV_P_ struct ev_idle *w)
779	{	1248	{
780	if (ev_is_active (w))	1249	if (ev_is_active (w))
781	return;	1250	return;
782		1251
		1252	ev_start (EV_A_ (W)w, ++idlecnt);
		1253	array_needsize (idles, idlemax, idlecnt, );
		1254	idles [idlecnt - 1] = w;
		1255	}
		1256
		1257	void
		1258	ev_idle_stop (EV_P_ struct ev_idle *w)
		1259	{
		1260	ev_clear_pending (EV_A_ (W)w);
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	idles [((W)w)->active - 1] = idles [--idlecnt];
		1265	ev_stop (EV_A_ (W)w);
		1266	}
		1267
		1268	void
		1269	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1270	{
		1271	if (ev_is_active (w))
		1272	return;
		1273
		1274	ev_start (EV_A_ (W)w, ++preparecnt);
		1275	array_needsize (prepares, preparemax, preparecnt, );
		1276	prepares [preparecnt - 1] = w;
		1277	}
		1278
		1279	void
		1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1281	{
		1282	ev_clear_pending (EV_A_ (W)w);
		1283	if (ev_is_active (w))
		1284	return;
		1285
		1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1287	ev_stop (EV_A_ (W)w);
		1288	}
		1289
		1290	void
		1291	ev_check_start (EV_P_ struct ev_check *w)
		1292	{
		1293	if (ev_is_active (w))
		1294	return;
		1295
		1296	ev_start (EV_A_ (W)w, ++checkcnt);
		1297	array_needsize (checks, checkmax, checkcnt, );
		1298	checks [checkcnt - 1] = w;
		1299	}
		1300
		1301	void
		1302	ev_check_stop (EV_P_ struct ev_check *w)
		1303	{
		1304	ev_clear_pending (EV_A_ (W)w);
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	checks [((W)w)->active - 1] = checks [--checkcnt];
		1309	ev_stop (EV_A_ (W)w);
		1310	}
		1311
		1312	#ifndef SA_RESTART
		1313	# define SA_RESTART 0
		1314	#endif
		1315
		1316	void
		1317	ev_signal_start (EV_P_ struct ev_signal *w)
		1318	{
		1319	#if EV_MULTIPLICITY
		1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1321	#endif
		1322	if (ev_is_active (w))
		1323	return;
		1324
		1325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1326
783	ev_start ((W)w, 1);	1327	ev_start (EV_A_ (W)w, 1);
784	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786		1330
787	if (!w->next)	1331	if (!((WL)w)->next)
788	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
789	struct sigaction sa;	1336	struct sigaction sa;
790	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
791	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
792	sa.sa_flags = 0;	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
794	}	1342	}
795	}	1343	}
796		1344
797	void	1345	void
798	evsignal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
799	{	1347	{
800	ev_clear ((W)w);	1348	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
802	return;	1350	return;
803		1351
804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805	ev_stop ((W)w);	1353	ev_stop (EV_A_ (W)w);
806		1354
807	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
808	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
809	}	1357	}
810		1358
811	void evidle_start (struct ev_idle *w)	1359	void
		1360	ev_child_start (EV_P_ struct ev_child *w)
812	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
813	if (ev_is_active (w))	1365	if (ev_is_active (w))
814	return;	1366	return;
815		1367
816	ev_start ((W)w, ++idlecnt);	1368	ev_start (EV_A_ (W)w, 1);
817	array_needsize (idles, idlemax, idlecnt, );	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
818	idles [idlecnt - 1] = w;
819	}	1370	}
820		1371
821	void evidle_stop (struct ev_idle *w)	1372	void
		1373	ev_child_stop (EV_P_ struct ev_child *w)
822	{	1374	{
823	ev_clear ((W)w);	1375	ev_clear_pending (EV_A_ (W)w);
824	if (ev_is_active (w))	1376	if (ev_is_active (w))
825	return;	1377	return;
826		1378
827	idles [w->active - 1] = idles [--idlecnt];	1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
828	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
829	}
830
831	void evcheck_start (struct ev_check *w)
832	{
833	if (ev_is_active (w))
834	return;
835
836	ev_start ((W)w, ++checkcnt);
837	array_needsize (checks, checkmax, checkcnt, );
838	checks [checkcnt - 1] = w;
839	}
840
841	void evcheck_stop (struct ev_check *w)
842	{
843	ev_clear ((W)w);
844	if (ev_is_active (w))
845	return;
846
847	checks [w->active - 1] = checks [--checkcnt];
848	ev_stop ((W)w);
849	}	1381	}
850		1382
851	/*****************************************************************************/	1383	/*****************************************************************************/
852		1384
853	struct ev_once	1385	struct ev_once
…		…
857	void (cb)(int revents, void arg);	1389	void (cb)(int revents, void arg);
858	void *arg;	1390	void *arg;
859	};	1391	};
860		1392
861	static void	1393	static void
862	once_cb (struct ev_once *once, int revents)	1394	once_cb (EV_P_ struct ev_once *once, int revents)
863	{	1395	{
864	void (cb)(int revents, void arg) = once->cb;	1396	void (cb)(int revents, void arg) = once->cb;
865	void *arg = once->arg;	1397	void *arg = once->arg;
866		1398
867	evio_stop (&once->io);	1399	ev_io_stop (EV_A_ &once->io);
868	evtimer_stop (&once->to);	1400	ev_timer_stop (EV_A_ &once->to);
869	free (once);	1401	free (once);
870		1402
871	cb (revents, arg);	1403	cb (revents, arg);
872	}	1404	}
873		1405
874	static void	1406	static void
875	once_cb_io (struct ev_io *w, int revents)	1407	once_cb_io (EV_P_ struct ev_io *w, int revents)
876	{	1408	{
877	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1409	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
878	}	1410	}
879		1411
880	static void	1412	static void
881	once_cb_to (struct ev_timer *w, int revents)	1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)
882	{	1414	{
883	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1415	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
884	}	1416	}
885		1417
886	void	1418	void
887	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
888	{	1420	{
889	struct ev_once *once = malloc (sizeof (struct ev_once));	1421	struct ev_once *once = malloc (sizeof (struct ev_once));
890		1422
891	if (!once)	1423	if (!once)
892	cb (EV_ERROR, arg);	1424	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
893	else	1425	else
894	{	1426	{
895	once->cb = cb;	1427	once->cb = cb;
896	once->arg = arg;	1428	once->arg = arg;
897		1429
898	evw_init (&once->io, once_cb_io);	1430	ev_watcher_init (&once->io, once_cb_io);
899
900	if (fd >= 0)	1431	if (fd >= 0)
901	{	1432	{
902	evio_set (&once->io, fd, events);	1433	ev_io_set (&once->io, fd, events);
903	evio_start (&once->io);	1434	ev_io_start (EV_A_ &once->io);
904	}	1435	}
905		1436
906	evw_init (&once->to, once_cb_to);	1437	ev_watcher_init (&once->to, once_cb_to);
907
908	if (timeout >= 0.)	1438	if (timeout >= 0.)
909	{	1439	{
910	evtimer_set (&once->to, timeout, 0.);	1440	ev_timer_set (&once->to, timeout, 0.);
911	evtimer_start (&once->to);	1441	ev_timer_start (EV_A_ &once->to);
912	}	1442	}
913	}	1443	}
914	}	1444	}
915		1445
916	/*****************************************************************************/
917
918	#if 0
919
920	struct ev_io wio;
921
922	static void
923	sin_cb (struct ev_io *w, int revents)
924	{
925	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
926	}
927
928	static void
929	ocb (struct ev_timer *w, int revents)
930	{
931	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
932	evtimer_stop (w);
933	evtimer_start (w);
934	}
935
936	static void
937	scb (struct ev_signal *w, int revents)
938	{
939	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
940	evio_stop (&wio);
941	evio_start (&wio);
942	}
943
944	static void
945	gcb (struct ev_signal *w, int revents)
946	{
947	fprintf (stderr, "generic %x\n", revents);
948
949	}
950
951	int main (void)
952	{
953	ev_init (0);
954
955	evio_init (&wio, sin_cb, 0, EV_READ);
956	evio_start (&wio);
957
958	struct ev_timer t[10000];
959
960	#if 0
961	int i;
962	for (i = 0; i < 10000; ++i)
963	{
964	struct ev_timer *w = t + i;
965	evw_init (w, ocb, i);
966	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
967	evtimer_start (w);
968	if (drand48 () < 0.5)
969	evtimer_stop (w);
970	}
971	#endif
972
973	struct ev_timer t1;
974	evtimer_init (&t1, ocb, 5, 10);
975	evtimer_start (&t1);
976
977	struct ev_signal sig;
978	evsignal_init (&sig, scb, SIGQUIT);
979	evsignal_start (&sig);
980
981	struct ev_check cw;
982	evcheck_init (&cw, gcb);
983	evcheck_start (&cw);
984
985	struct ev_idle iw;
986	evidle_init (&iw, gcb);
987	evidle_start (&iw);
988
989	ev_loop (0);
990
991	return 0;
992	}
993
994	#endif
995
996
997
998

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Comparing libev/ev.c (file contents): Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs. Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC