[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 1.62 by root, Sun Nov 4 20:38:07 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
77	static int have_monotonic; /* runtime */
78
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		149
83	/*****************************************************************************/	150	/*****************************************************************************/
84		151
85	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
86	ev_time (void)	186	ev_time (void)
87	{	187	{
88	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
89	struct timespec ts;	189	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	192	#else
93	struct timeval tv;	193	struct timeval tv;
94	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	196	#endif
97	}	197	}
98		198
99	static ev_tstamp	199	inline ev_tstamp
100	get_clock (void)	200	get_clock (void)
101	{	201	{
102	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
103	if (have_monotonic)	203	if (expect_true (have_monotonic))
104	{	204	{
105	struct timespec ts;	205	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	208	}
109	#endif	209	#endif
110		210
111	return ev_time ();	211	return ev_time ();
112	}	212	}
113		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		221
114	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
115	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
116	{ \	224	{ \
117	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
		226	do \
		227	{ \
		228	newcnt = array_roundsize (base, newcnt << 1); \
		229	} \
		230	while ((cnt) > newcnt); \
		231	\
118	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
119	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	234	cur = newcnt; \
121	}	235	}
122		236
123	/*****************************************************************************/	237	/*****************************************************************************/
124		238
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	239	static void
138	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
139	{	241	{
140	while (count--)	242	while (count--)
141	{	243	{
142	base->head = 0;	244	base->head = 0;
143	base->wev = base->rev = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
144	++base;	248	++base;
145	}	249	}
146	}	250	}
147		251
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	252	static void
158	event (W w, int events)	253	event (EV_P_ W w, int events)
159	{	254	{
160	if (w->active)	255	if (w->pending)
161	{	256	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		258	return;
166	}	259	}
167	}
168		260
		261	w->pending = ++pendingcnt [ABSPRI (w)];
		262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		263	pendings [ABSPRI (w)][w->pending - 1].w = w;
		264	pendings [ABSPRI (w)][w->pending - 1].events = events;
		265	}
		266
169	static void	267	static void
		268	queue_events (EV_P_ W *events, int eventcnt, int type)
		269	{
		270	int i;
		271
		272	for (i = 0; i < eventcnt; ++i)
		273	event (EV_A_ events [i], type);
		274	}
		275
		276	static void
170	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
171	{	278	{
172	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	280	struct ev_io *w;
174		281
175	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
176	{	283	{
177	int ev = w->events & events;	284	int ev = w->events & events;
178		285
179	if (ev)	286	if (ev)
180	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
181	}	288	}
182	}	289	}
183		290
		291	/*****************************************************************************/
		292
184	static void	293	static void
185	queue_events (W *events, int eventcnt, int type)	294	fd_reify (EV_P)
186	{	295	{
187	int i;	296	int i;
188		297
189	for (i = 0; i < eventcnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	299	{
		300	int fd = fdchanges [i];
		301	ANFD *anfd = anfds + fd;
		302	struct ev_io *w;
		303
		304	int events = 0;
		305
		306	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		307	events \|= w->events;
		308
		309	anfd->reify = 0;
		310
		311	if (anfd->events != events)
		312	{
		313	method_modify (EV_A_ fd, anfd->events, events);
		314	anfd->events = events;
		315	}
		316	}
		317
		318	fdchangecnt = 0;
		319	}
		320
		321	static void
		322	fd_change (EV_P_ int fd)
		323	{
		324	if (anfds [fd].reify \|\| fdchangecnt < 0)
		325	return;
		326
		327	anfds [fd].reify = 1;
		328
		329	++fdchangecnt;
		330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		331	fdchanges [fdchangecnt - 1] = fd;
		332	}
		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		343	}
		344	}
		345
		346	/* called on EBADF to verify fds */
		347	static void
		348	fd_ebadf (EV_P)
		349	{
		350	int fd;
		351
		352	for (fd = 0; fd < anfdmax; ++fd)
		353	if (anfds [fd].events)
		354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		355	fd_kill (EV_A_ fd);
		356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
		366	{
		367	close (fd);
		368	fd_kill (EV_A_ fd);
		369	return;
		370	}
		371	}
		372
		373	/* susually called after fork if method needs to re-arm all fds from scratch */
		374	static void
		375	fd_rearm_all (EV_P)
		376	{
		377	int fd;
		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
191	}	386	}
192		387
193	/*****************************************************************************/	388	/*****************************************************************************/
194		389
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	390	static void
202	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
203	{	392	{
204	WT w = timers [k];	393	WT w = heap [k];
205		394
206	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
207	{	396	{
208	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
210	k >>= 1;	399	k >>= 1;
211	}	400	}
212		401
213	timers [k] = w;	402	heap [k] = w;
214	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
215		404
216	}	405	}
217		406
218	static void	407	static void
219	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
220	{	409	{
221	WT w = timers [k];	410	WT w = heap [k];
222		411
223	while (k < (N >> 1))	412	while (k < (N >> 1))
224	{	413	{
225	int j = k << 1;	414	int j = k << 1;
226		415
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	417	++j;
229		418
230	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
231	break;	420	break;
232		421
233	timers [k] = timers [j];	422	heap [k] = heap [j];
234	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
235	k = j;	424	k = j;
236	}	425	}
237		426
238	timers [k] = w;	427	heap [k] = w;
239	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
240	}	429	}
241		430
242	/*****************************************************************************/	431	/*****************************************************************************/
243		432
244	typedef struct	433	typedef struct
245	{	434	{
246	struct ev_signal *head;	435	struct ev_watcher_list *head;
247	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
248	} ANSIG;	437	} ANSIG;
249		438
250	static ANSIG *signals;	439	static ANSIG *signals;
251	static int signalmax;	440	static int signalmax;
252		441
253	static int sigpipe [2];	442	static int sigpipe [2];
254	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	444	static struct ev_io sigev;
256		445
257	static void	446	static void
258	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
259	{	448	{
260	while (count--)	449	while (count--)
261	{	450	{
262	base->head = 0;	451	base->head = 0;
263	base->gotsig = 0;	452	base->gotsig = 0;
		453
264	++base;	454	++base;
265	}	455	}
266	}	456	}
267		457
268	static void	458	static void
…		…
270	{	460	{
271	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
272		462
273	if (!gotsig)	463	if (!gotsig)
274	{	464	{
		465	int old_errno = errno;
275	gotsig = 1;	466	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
277	}	469	}
278	}	470	}
279		471
280	static void	472	static void
281	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	474	{
283	struct ev_signal *w;	475	struct ev_watcher_list *w;
284	int sig;	476	int signum;
285		477
		478	read (sigpipe [0], &revents, 1);
286	gotsig = 0;	479	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		480
289	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
291	{	483	{
292	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
293		485
294	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
296	}	488	}
297	}	489	}
298		490
299	static void	491	static void
300	siginit (void)	492	siginit (EV_P)
301	{	493	{
		494	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		497
305	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
308		502
309	evio_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	506	}
312		507
313	/*****************************************************************************/	508	/*****************************************************************************/
314		509
315	static struct ev_idle **idles;	510	#ifndef WIN32
316	static int idlemax, idlecnt;
317		511
318	static struct ev_check **checks;	512	static struct ev_child *childs [PID_HASHSIZE];
319	static int checkmax, checkcnt;	513	static struct ev_signal childev;
		514
		515	#ifndef WCONTINUED
		516	# define WCONTINUED 0
		517	#endif
		518
		519	static void
		520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		521	{
		522	struct ev_child *w;
		523
		524	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		525	if (w->pid == pid \|\| !w->pid)
		526	{
		527	w->priority = sw->priority; /* need to do it now */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
		537	int pid, status;
		538
		539	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		540	{
		541	/* make sure we are called again until all childs have been reaped */
		542	event (EV_A_ (W)sw, EV_SIGNAL);
		543
		544	child_reap (EV_A_ sw, pid, pid, status);
		545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
		547	}
		548
		549	#endif
320		550
321	/*****************************************************************************/	551	/*****************************************************************************/
322		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
323	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	557	# include "ev_epoll.c"
325	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
326	#if HAVE_SELECT	562	#if EV_USE_SELECT
327	# include "ev_select.c"	563	# include "ev_select.c"
328	#endif	564	#endif
329		565
330	int ev_init (int flags)	566	int
		567	ev_version_major (void)
331	{	568	{
		569	return EV_VERSION_MAJOR;
		570	}
		571
		572	int
		573	ev_version_minor (void)
		574	{
		575	return EV_VERSION_MINOR;
		576	}
		577
		578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
		581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	\|\| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
		599	if (!method)
		600	{
332	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
333	{	602	{
334	struct timespec ts;	603	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	605	have_monotonic = 1;
337	}	606	}
338	#endif	607	#endif
339		608
340	ev_now = ev_time ();	609	rt_now = ev_time ();
341	now = get_clock ();	610	mn_now = get_clock ();
342	diff = ev_now - now;	611	now_floor = mn_now;
		612	rtmn_diff = rt_now - mn_now;
343		613
		614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
		618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_EPOLL
		628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		632	#endif
		633	#if EV_USE_SELECT
		634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		635	#endif
		636	}
		637	}
		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	#if EV_USE_WIN32
		643	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		644	#endif
		645	#if EV_USE_KQUEUE
		646	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		647	#endif
		648	#if EV_USE_EPOLL
		649	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_POLL
		652	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		653	#endif
		654	#if EV_USE_SELECT
		655	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		656	#endif
		657
		658	method = 0;
		659	/TODO/
		660	}
		661
		662	void
		663	loop_fork (EV_P)
		664	{
		665	/TODO/
		666	#if EV_USE_EPOLL
		667	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		668	#endif
		669	#if EV_USE_KQUEUE
		670	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		671	#endif
		672	}
		673
		674	#if EV_MULTIPLICITY
		675	struct ev_loop *
		676	ev_loop_new (int methods)
		677	{
		678	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		679
		680	loop_init (EV_A_ methods);
		681
		682	if (ev_method (EV_A))
		683	return loop;
		684
		685	return 0;
		686	}
		687
		688	void
		689	ev_loop_destroy (EV_P)
		690	{
		691	loop_destroy (EV_A);
		692	free (loop);
		693	}
		694
		695	void
		696	ev_loop_fork (EV_P)
		697	{
		698	loop_fork (EV_A);
		699	}
		700
		701	#endif
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop default_loop_struct;
		705	static struct ev_loop *default_loop;
		706
		707	struct ev_loop *
		708	#else
		709	static int default_loop;
		710
		711	int
		712	#endif
		713	ev_default_loop (int methods)
		714	{
		715	if (sigpipe [0] == sigpipe [1])
344	if (pipe (sigpipe))	716	if (pipe (sigpipe))
345	return 0;	717	return 0;
346		718
347	ev_method = EVMETHOD_NONE;	719	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	{	720	{
		721	#if EV_MULTIPLICITY
		722	struct ev_loop *loop = default_loop = &default_loop_struct;
		723	#else
		724	default_loop = 1;
		725	#endif
		726
		727	loop_init (EV_A_ methods);
		728
		729	if (ev_method (EV_A))
		730	{
357	evw_init (&sigev, sigcb);	731	ev_watcher_init (&sigev, sigcb);
		732	ev_set_priority (&sigev, EV_MAXPRI);
358	siginit ();	733	siginit (EV_A);
359	}
360		734
361	return ev_method;	735	#ifndef WIN32
362	}	736	ev_signal_init (&childev, childcb, SIGCHLD);
363		737	ev_set_priority (&childev, EV_MAXPRI);
364	/*****************************************************************************/	738	ev_signal_start (EV_A_ &childev);
365		739	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	740	#endif
		741	}
		742	else
		743	default_loop = 0;
		744	}
382		745
		746	return default_loop;
		747	}
		748
		749	void
		750	ev_default_destroy (void)
		751	{
		752	#if EV_MULTIPLICITY
		753	struct ev_loop *loop = default_loop;
		754	#endif
		755
		756	ev_ref (EV_A); /* child watcher */
		757	ev_signal_stop (EV_A_ &childev);
		758
		759	ev_ref (EV_A); /* signal watcher */
383	evio_stop (&sigev);	760	ev_io_stop (EV_A_ &sigev);
		761
		762	close (sigpipe [0]); sigpipe [0] = 0;
		763	close (sigpipe [1]); sigpipe [1] = 0;
		764
		765	loop_destroy (EV_A);
		766	}
		767
		768	void
		769	ev_default_fork (void)
		770	{
		771	#if EV_MULTIPLICITY
		772	struct ev_loop *loop = default_loop;
		773	#endif
		774
		775	loop_fork (EV_A);
		776
		777	ev_io_stop (EV_A_ &sigev);
384	close (sigpipe [0]);	778	close (sigpipe [0]);
385	close (sigpipe [1]);	779	close (sigpipe [1]);
386	pipe (sigpipe);	780	pipe (sigpipe);
		781
		782	ev_ref (EV_A); /* signal watcher */
387	siginit ();	783	siginit (EV_A);
388	}	784	}
389		785
390	/*****************************************************************************/	786	/*****************************************************************************/
391		787
392	static void	788	static void
393	fd_reify (void)	789	call_pending (EV_P)
394	{	790	{
395	int i;	791	int pri;
396		792
397	for (i = 0; i < fdchangecnt; ++i)	793	for (pri = NUMPRI; pri--; )
398	{	794	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	{	795	{
410	method_modify (fd, anfd->wev, wev);	796	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
411	anfd->wev = wev;
412	}
413	}
414		797
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)	798	if (p->w)
428	{	799	{
429	p->w->pending = 0;	800	p->w->pending = 0;
430	p->w->cb (p->w, p->events);	801	p->w->cb (EV_A_ p->w, p->events);
431	}	802	}
432	}	803	}
433
434	pendingcnt = 0;
435	}	804	}
436		805
437	static void	806	static void
438	timers_reify ()	807	timers_reify (EV_P)
439	{	808	{
440	while (timercnt && timers [0]->at <= now)	809	while (timercnt && timers [0]->at <= mn_now)
441	{	810	{
442	struct ev_timer *w = timers [0];	811	struct ev_timer *w = timers [0];
443		812
444	event ((W)w, EV_TIMEOUT);	813	assert (("inactive timer on timer heap detected", ev_is_active (w)));
445		814
446	/* first reschedule or stop timer */	815	/* first reschedule or stop timer */
447	if (w->repeat)	816	if (w->repeat)
448	{	817	{
		818	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
449	w->at = now + w->repeat;	819	w->at = mn_now + w->repeat;
450	assert (("timer timeout in the past, negative repeat?", w->at > now));
451	downheap ((WT *)timers, timercnt, 0);	820	downheap ((WT *)timers, timercnt, 0);
452	}	821	}
453	else	822	else
454	evtimer_stop (w); /* nonrepeating: stop timer */	823	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455	}
456	}
457		824
		825	event (EV_A_ (W)w, EV_TIMEOUT);
		826	}
		827	}
		828
458	static void	829	static void
459	periodics_reify ()	830	periodics_reify (EV_P)
460	{	831	{
461	while (periodiccnt && periodics [0]->at <= ev_now)	832	while (periodiccnt && periodics [0]->at <= rt_now)
462	{	833	{
463	struct ev_periodic *w = periodics [0];	834	struct ev_periodic *w = periodics [0];
		835
		836	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
464		837
465	/* first reschedule or stop timer */	838	/* first reschedule or stop timer */
466	if (w->interval)	839	if (w->interval)
467	{	840	{
468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	841	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
469	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	842	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
470	downheap ((WT *)periodics, periodiccnt, 0);	843	downheap ((WT *)periodics, periodiccnt, 0);
471	}	844	}
472	else	845	else
473	evperiodic_stop (w); /* nonrepeating: stop timer */	846	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474		847
475	event ((W)w, EV_TIMEOUT);	848	event (EV_A_ (W)w, EV_PERIODIC);
476	}	849	}
477	}	850	}
478		851
479	static void	852	static void
480	periodics_reschedule (ev_tstamp diff)	853	periodics_reschedule (EV_P)
481	{	854	{
482	int i;	855	int i;
483		856
484	/* adjust periodics after time jump */	857	/* adjust periodics after time jump */
485	for (i = 0; i < periodiccnt; ++i)	858	for (i = 0; i < periodiccnt; ++i)
486	{	859	{
487	struct ev_periodic *w = periodics [i];	860	struct ev_periodic *w = periodics [i];
488		861
489	if (w->interval)	862	if (w->interval)
490	{	863	{
491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	864	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
492		865
493	if (fabs (diff) >= 1e-4)	866	if (fabs (diff) >= 1e-4)
494	{	867	{
495	evperiodic_stop (w);	868	ev_periodic_stop (EV_A_ w);
496	evperiodic_start (w);	869	ev_periodic_start (EV_A_ w);
497		870
498	i = 0; /* restart loop, inefficient, but time jumps should be rare */	871	i = 0; /* restart loop, inefficient, but time jumps should be rare */
499	}	872	}
500	}	873	}
501	}	874	}
502	}	875	}
503		876
		877	inline int
		878	time_update_monotonic (EV_P)
		879	{
		880	mn_now = get_clock ();
		881
		882	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		883	{
		884	rt_now = rtmn_diff + mn_now;
		885	return 0;
		886	}
		887	else
		888	{
		889	now_floor = mn_now;
		890	rt_now = ev_time ();
		891	return 1;
		892	}
		893	}
		894
504	static void	895	static void
505	time_update ()	896	time_update (EV_P)
506	{	897	{
507	int i;	898	int i;
508		899
509	ev_now = ev_time ();	900	#if EV_USE_MONOTONIC
510
511	if (have_monotonic)	901	if (expect_true (have_monotonic))
512	{	902	{
513	ev_tstamp odiff = diff;	903	if (time_update_monotonic (EV_A))
514
515	for (i = 4; --i; ) /* loop a few times, before making important decisions */
516	{	904	{
517	now = get_clock ();	905	ev_tstamp odiff = rtmn_diff;
		906
		907	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		908	{
518	diff = ev_now - now;	909	rtmn_diff = rt_now - mn_now;
519		910
520	if (fabs (odiff - diff) < MIN_TIMEJUMP)	911	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
521	return; /* all is well */	912	return; /* all is well */
522		913
523	ev_now = ev_time ();	914	rt_now = ev_time ();
		915	mn_now = get_clock ();
		916	now_floor = mn_now;
		917	}
		918
		919	periodics_reschedule (EV_A);
		920	/* no timer adjustment, as the monotonic clock doesn't jump */
		921	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
524	}	922	}
525
526	periodics_reschedule (diff - odiff);
527	/* no timer adjustment, as the monotonic clock doesn't jump */
528	}	923	}
529	else	924	else
		925	#endif
530	{	926	{
531	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	927	rt_now = ev_time ();
		928
		929	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
532	{	930	{
533	periodics_reschedule (ev_now - now);	931	periodics_reschedule (EV_A);
534		932
535	/* adjust timers. this is easy, as the offset is the same for all */	933	/* adjust timers. this is easy, as the offset is the same for all */
536	for (i = 0; i < timercnt; ++i)	934	for (i = 0; i < timercnt; ++i)
537	timers [i]->at += diff;	935	timers [i]->at += rt_now - mn_now;
538	}	936	}
539		937
540	now = ev_now;	938	mn_now = rt_now;
541	}	939	}
542	}	940	}
543		941
544	int ev_loop_done;	942	void
		943	ev_ref (EV_P)
		944	{
		945	++activecnt;
		946	}
545		947
		948	void
		949	ev_unref (EV_P)
		950	{
		951	--activecnt;
		952	}
		953
		954	static int loop_done;
		955
		956	void
546	void ev_loop (int flags)	957	ev_loop (EV_P_ int flags)
547	{	958	{
548	double block;	959	double block;
549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	960	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		961
557	do	962	do
558	{	963	{
		964	/* queue check watchers (and execute them) */
		965	if (expect_false (preparecnt))
		966	{
		967	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		968	call_pending (EV_A);
		969	}
		970
559	/* update fd-related kernel structures */	971	/* update fd-related kernel structures */
560	fd_reify ();	972	fd_reify (EV_A);
561		973
562	/* calculate blocking time */	974	/* calculate blocking time */
563		975
564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	976	/* we only need this for !monotonic clockor timers, but as we basically
		977	always have timers, we just calculate it always */
		978	#if EV_USE_MONOTONIC
		979	if (expect_true (have_monotonic))
		980	time_update_monotonic (EV_A);
		981	else
		982	#endif
		983	{
565	ev_now = ev_time ();	984	rt_now = ev_time ();
		985	mn_now = rt_now;
		986	}
566		987
567	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	988	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
568	block = 0.;	989	block = 0.;
569	else	990	else
570	{	991	{
571	block = MAX_BLOCKTIME;	992	block = MAX_BLOCKTIME;
572		993
573	if (timercnt)	994	if (timercnt)
574	{	995	{
575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	996	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
576	if (block > to) block = to;	997	if (block > to) block = to;
577	}	998	}
578		999
579	if (periodiccnt)	1000	if (periodiccnt)
580	{	1001	{
581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1002	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
582	if (block > to) block = to;	1003	if (block > to) block = to;
583	}	1004	}
584		1005
585	if (block < 0.) block = 0.;	1006	if (block < 0.) block = 0.;
586	}	1007	}
587		1008
588	method_poll (block);	1009	method_poll (EV_A_ block);
589		1010
590	/* update ev_now, do magic */	1011	/* update rt_now, do magic */
591	time_update ();	1012	time_update (EV_A);
592		1013
593	/* queue pending timers and reschedule them */	1014	/* queue pending timers and reschedule them */
		1015	timers_reify (EV_A); /* relative timers called last */
594	periodics_reify (); /* absolute timers first */	1016	periodics_reify (EV_A); /* absolute timers called first */
595	timers_reify (); /* relative timers second */
596		1017
597	/* queue idle watchers unless io or timers are pending */	1018	/* queue idle watchers unless io or timers are pending */
598	if (!pendingcnt)	1019	if (!pendingcnt)
599	queue_events ((W *)idles, idlecnt, EV_IDLE);	1020	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
600		1021
601	/* queue check and possibly idle watchers */	1022	/* queue check watchers, to be executed first */
		1023	if (checkcnt)
602	queue_events ((W *)checks, checkcnt, EV_CHECK);	1024	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603		1025
604	call_pending ();	1026	call_pending (EV_A);
605	}	1027	}
606	while (!ev_loop_done);	1028	while (activecnt && !loop_done);
607		1029
608	if (ev_loop_done != 2)	1030	if (loop_done != 2)
609	ev_loop_done = 0;	1031	loop_done = 0;
		1032	}
		1033
		1034	void
		1035	ev_unloop (EV_P_ int how)
		1036	{
		1037	loop_done = how;
610	}	1038	}
611		1039
612	/*****************************************************************************/	1040	/*****************************************************************************/
613		1041
614	static void	1042	inline void
615	wlist_add (WL *head, WL elem)	1043	wlist_add (WL *head, WL elem)
616	{	1044	{
617	elem->next = *head;	1045	elem->next = *head;
618	*head = elem;	1046	*head = elem;
619	}	1047	}
620		1048
621	static void	1049	inline void
622	wlist_del (WL *head, WL elem)	1050	wlist_del (WL *head, WL elem)
623	{	1051	{
624	while (*head)	1052	while (*head)
625	{	1053	{
626	if (*head == elem)	1054	if (*head == elem)
…		…
631		1059
632	head = &(*head)->next;	1060	head = &(*head)->next;
633	}	1061	}
634	}	1062	}
635		1063
636	static void	1064	inline void
637	ev_clear (W w)	1065	ev_clear_pending (EV_P_ W w)
638	{	1066	{
639	if (w->pending)	1067	if (w->pending)
640	{	1068	{
641	pendings [w->pending - 1].w = 0;	1069	pendings [ABSPRI (w)][w->pending - 1].w = 0;
642	w->pending = 0;	1070	w->pending = 0;
643	}	1071	}
644	}	1072	}
645		1073
646	static void	1074	inline void
647	ev_start (W w, int active)	1075	ev_start (EV_P_ W w, int active)
648	{	1076	{
		1077	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1078	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1079
649	w->active = active;	1080	w->active = active;
		1081	ev_ref (EV_A);
650	}	1082	}
651		1083
652	static void	1084	inline void
653	ev_stop (W w)	1085	ev_stop (EV_P_ W w)
654	{	1086	{
		1087	ev_unref (EV_A);
655	w->active = 0;	1088	w->active = 0;
656	}	1089	}
657		1090
658	/*****************************************************************************/	1091	/*****************************************************************************/
659		1092
660	void	1093	void
661	evio_start (struct ev_io *w)	1094	ev_io_start (EV_P_ struct ev_io *w)
662	{	1095	{
		1096	int fd = w->fd;
		1097
663	if (ev_is_active (w))	1098	if (ev_is_active (w))
664	return;	1099	return;
665		1100
666	int fd = w->fd;	1101	assert (("ev_io_start called with negative fd", fd >= 0));
667		1102
668	ev_start ((W)w, 1);	1103	ev_start (EV_A_ (W)w, 1);
669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1104	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
670	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1105	wlist_add ((WL *)&anfds[fd].head, (WL)w);
671		1106
672	++fdchangecnt;	1107	fd_change (EV_A_ fd);
673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674	fdchanges [fdchangecnt - 1] = fd;
675	}	1108	}
676		1109
677	void	1110	void
678	evio_stop (struct ev_io *w)	1111	ev_io_stop (EV_P_ struct ev_io *w)
679	{	1112	{
680	ev_clear ((W)w);	1113	ev_clear_pending (EV_A_ (W)w);
681	if (!ev_is_active (w))	1114	if (!ev_is_active (w))
682	return;	1115	return;
683		1116
684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1117	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685	ev_stop ((W)w);	1118	ev_stop (EV_A_ (W)w);
686		1119
687	++fdchangecnt;	1120	fd_change (EV_A_ w->fd);
688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689	fdchanges [fdchangecnt - 1] = w->fd;
690	}	1121	}
691		1122
692	void	1123	void
693	evtimer_start (struct ev_timer *w)	1124	ev_timer_start (EV_P_ struct ev_timer *w)
694	{	1125	{
695	if (ev_is_active (w))	1126	if (ev_is_active (w))
696	return;	1127	return;
697		1128
698	w->at += now;	1129	w->at += mn_now;
699		1130
700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1131	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701		1132
702	ev_start ((W)w, ++timercnt);	1133	ev_start (EV_A_ (W)w, ++timercnt);
703	array_needsize (timers, timermax, timercnt, );	1134	array_needsize (timers, timermax, timercnt, );
704	timers [timercnt - 1] = w;	1135	timers [timercnt - 1] = w;
705	upheap ((WT *)timers, timercnt - 1);	1136	upheap ((WT *)timers, timercnt - 1);
706	}
707		1137
		1138	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1139	}
		1140
708	void	1141	void
709	evtimer_stop (struct ev_timer *w)	1142	ev_timer_stop (EV_P_ struct ev_timer *w)
710	{	1143	{
711	ev_clear ((W)w);	1144	ev_clear_pending (EV_A_ (W)w);
712	if (!ev_is_active (w))	1145	if (!ev_is_active (w))
713	return;	1146	return;
714		1147
		1148	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1149
715	if (w->active < timercnt--)	1150	if (((W)w)->active < timercnt--)
716	{	1151	{
717	timers [w->active - 1] = timers [timercnt];	1152	timers [((W)w)->active - 1] = timers [timercnt];
718	downheap ((WT *)timers, timercnt, w->active - 1);	1153	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
719	}	1154	}
720		1155
721	w->at = w->repeat;	1156	w->at = w->repeat;
722		1157
723	ev_stop ((W)w);	1158	ev_stop (EV_A_ (W)w);
724	}	1159	}
725		1160
726	void	1161	void
727	evtimer_again (struct ev_timer *w)	1162	ev_timer_again (EV_P_ struct ev_timer *w)
728	{	1163	{
729	if (ev_is_active (w))	1164	if (ev_is_active (w))
730	{	1165	{
731	if (w->repeat)	1166	if (w->repeat)
732	{	1167	{
733	w->at = now + w->repeat;	1168	w->at = mn_now + w->repeat;
734	downheap ((WT *)timers, timercnt, w->active - 1);	1169	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
735	}	1170	}
736	else	1171	else
737	evtimer_stop (w);	1172	ev_timer_stop (EV_A_ w);
738	}	1173	}
739	else if (w->repeat)	1174	else if (w->repeat)
740	evtimer_start (w);	1175	ev_timer_start (EV_A_ w);
741	}	1176	}
742		1177
743	void	1178	void
744	evperiodic_start (struct ev_periodic *w)	1179	ev_periodic_start (EV_P_ struct ev_periodic *w)
745	{	1180	{
746	if (ev_is_active (w))	1181	if (ev_is_active (w))
747	return;	1182	return;
748		1183
749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1184	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
750		1185
751	/* this formula differs from the one in periodic_reify because we do not always round up */	1186	/* this formula differs from the one in periodic_reify because we do not always round up */
752	if (w->interval)	1187	if (w->interval)
753	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1188	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
754		1189
755	ev_start ((W)w, ++periodiccnt);	1190	ev_start (EV_A_ (W)w, ++periodiccnt);
756	array_needsize (periodics, periodicmax, periodiccnt, );	1191	array_needsize (periodics, periodicmax, periodiccnt, );
757	periodics [periodiccnt - 1] = w;	1192	periodics [periodiccnt - 1] = w;
758	upheap ((WT *)periodics, periodiccnt - 1);	1193	upheap ((WT *)periodics, periodiccnt - 1);
759	}
760		1194
		1195	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1196	}
		1197
761	void	1198	void
762	evperiodic_stop (struct ev_periodic *w)	1199	ev_periodic_stop (EV_P_ struct ev_periodic *w)
763	{	1200	{
764	ev_clear ((W)w);	1201	ev_clear_pending (EV_A_ (W)w);
765	if (!ev_is_active (w))	1202	if (!ev_is_active (w))
766	return;	1203	return;
767		1204
		1205	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1206
768	if (w->active < periodiccnt--)	1207	if (((W)w)->active < periodiccnt--)
769	{	1208	{
770	periodics [w->active - 1] = periodics [periodiccnt];	1209	periodics [((W)w)->active - 1] = periodics [periodiccnt];
771	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1210	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
772	}	1211	}
773		1212
774	ev_stop ((W)w);	1213	ev_stop (EV_A_ (W)w);
775	}	1214	}
776		1215
777	void	1216	void
778	evsignal_start (struct ev_signal *w)	1217	ev_idle_start (EV_P_ struct ev_idle *w)
779	{	1218	{
780	if (ev_is_active (w))	1219	if (ev_is_active (w))
781	return;	1220	return;
782		1221
		1222	ev_start (EV_A_ (W)w, ++idlecnt);
		1223	array_needsize (idles, idlemax, idlecnt, );
		1224	idles [idlecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_idle_stop (EV_P_ struct ev_idle *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	idles [((W)w)->active - 1] = idles [--idlecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++preparecnt);
		1245	array_needsize (prepares, preparemax, preparecnt, );
		1246	prepares [preparecnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	void
		1261	ev_check_start (EV_P_ struct ev_check *w)
		1262	{
		1263	if (ev_is_active (w))
		1264	return;
		1265
		1266	ev_start (EV_A_ (W)w, ++checkcnt);
		1267	array_needsize (checks, checkmax, checkcnt, );
		1268	checks [checkcnt - 1] = w;
		1269	}
		1270
		1271	void
		1272	ev_check_stop (EV_P_ struct ev_check *w)
		1273	{
		1274	ev_clear_pending (EV_A_ (W)w);
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	checks [((W)w)->active - 1] = checks [--checkcnt];
		1279	ev_stop (EV_A_ (W)w);
		1280	}
		1281
		1282	#ifndef SA_RESTART
		1283	# define SA_RESTART 0
		1284	#endif
		1285
		1286	void
		1287	ev_signal_start (EV_P_ struct ev_signal *w)
		1288	{
		1289	#if EV_MULTIPLICITY
		1290	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1291	#endif
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1296
783	ev_start ((W)w, 1);	1297	ev_start (EV_A_ (W)w, 1);
784	array_needsize (signals, signalmax, w->signum, signals_init);	1298	array_needsize (signals, signalmax, w->signum, signals_init);
785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1299	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786		1300
787	if (!w->next)	1301	if (!w->next)
788	{	1302	{
789	struct sigaction sa;	1303	struct sigaction sa;
790	sa.sa_handler = sighandler;	1304	sa.sa_handler = sighandler;
791	sigfillset (&sa.sa_mask);	1305	sigfillset (&sa.sa_mask);
792	sa.sa_flags = 0;	1306	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793	sigaction (w->signum, &sa, 0);	1307	sigaction (w->signum, &sa, 0);
794	}	1308	}
795	}	1309	}
796		1310
797	void	1311	void
798	evsignal_stop (struct ev_signal *w)	1312	ev_signal_stop (EV_P_ struct ev_signal *w)
799	{	1313	{
800	ev_clear ((W)w);	1314	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1315	if (!ev_is_active (w))
802	return;	1316	return;
803		1317
804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1318	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805	ev_stop ((W)w);	1319	ev_stop (EV_A_ (W)w);
806		1320
807	if (!signals [w->signum - 1].head)	1321	if (!signals [w->signum - 1].head)
808	signal (w->signum, SIG_DFL);	1322	signal (w->signum, SIG_DFL);
809	}	1323	}
810		1324
811	void evidle_start (struct ev_idle *w)	1325	void
		1326	ev_child_start (EV_P_ struct ev_child *w)
812	{	1327	{
		1328	#if EV_MULTIPLICITY
		1329	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1330	#endif
813	if (ev_is_active (w))	1331	if (ev_is_active (w))
814	return;	1332	return;
815		1333
816	ev_start ((W)w, ++idlecnt);	1334	ev_start (EV_A_ (W)w, 1);
817	array_needsize (idles, idlemax, idlecnt, );	1335	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
818	idles [idlecnt - 1] = w;
819	}	1336	}
820		1337
821	void evidle_stop (struct ev_idle *w)	1338	void
		1339	ev_child_stop (EV_P_ struct ev_child *w)
822	{	1340	{
823	ev_clear ((W)w);	1341	ev_clear_pending (EV_A_ (W)w);
824	if (ev_is_active (w))	1342	if (ev_is_active (w))
825	return;	1343	return;
826		1344
827	idles [w->active - 1] = idles [--idlecnt];	1345	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
828	ev_stop ((W)w);	1346	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	}	1347	}
850		1348
851	/*****************************************************************************/	1349	/*****************************************************************************/
852		1350
853	struct ev_once	1351	struct ev_once
…		…
857	void (cb)(int revents, void arg);	1355	void (cb)(int revents, void arg);
858	void *arg;	1356	void *arg;
859	};	1357	};
860		1358
861	static void	1359	static void
862	once_cb (struct ev_once *once, int revents)	1360	once_cb (EV_P_ struct ev_once *once, int revents)
863	{	1361	{
864	void (cb)(int revents, void arg) = once->cb;	1362	void (cb)(int revents, void arg) = once->cb;
865	void *arg = once->arg;	1363	void *arg = once->arg;
866		1364
867	evio_stop (&once->io);	1365	ev_io_stop (EV_A_ &once->io);
868	evtimer_stop (&once->to);	1366	ev_timer_stop (EV_A_ &once->to);
869	free (once);	1367	free (once);
870		1368
871	cb (revents, arg);	1369	cb (revents, arg);
872	}	1370	}
873		1371
874	static void	1372	static void
875	once_cb_io (struct ev_io *w, int revents)	1373	once_cb_io (EV_P_ struct ev_io *w, int revents)
876	{	1374	{
877	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1375	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
878	}	1376	}
879		1377
880	static void	1378	static void
881	once_cb_to (struct ev_timer *w, int revents)	1379	once_cb_to (EV_P_ struct ev_timer *w, int revents)
882	{	1380	{
883	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1381	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
884	}	1382	}
885		1383
886	void	1384	void
887	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1385	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
888	{	1386	{
889	struct ev_once *once = malloc (sizeof (struct ev_once));	1387	struct ev_once *once = malloc (sizeof (struct ev_once));
890		1388
891	if (!once)	1389	if (!once)
892	cb (EV_ERROR, arg);	1390	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
893	else	1391	else
894	{	1392	{
895	once->cb = cb;	1393	once->cb = cb;
896	once->arg = arg;	1394	once->arg = arg;
897		1395
898	evw_init (&once->io, once_cb_io);	1396	ev_watcher_init (&once->io, once_cb_io);
899
900	if (fd >= 0)	1397	if (fd >= 0)
901	{	1398	{
902	evio_set (&once->io, fd, events);	1399	ev_io_set (&once->io, fd, events);
903	evio_start (&once->io);	1400	ev_io_start (EV_A_ &once->io);
904	}	1401	}
905		1402
906	evw_init (&once->to, once_cb_to);	1403	ev_watcher_init (&once->to, once_cb_to);
907
908	if (timeout >= 0.)	1404	if (timeout >= 0.)
909	{	1405	{
910	evtimer_set (&once->to, timeout, 0.);	1406	ev_timer_set (&once->to, timeout, 0.);
911	evtimer_start (&once->to);	1407	ev_timer_start (EV_A_ &once->to);
912	}	1408	}
913	}	1409	}
914	}	1410	}
915		1411
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 1.62 by root, Sun Nov 4 20:38:07 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC