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

Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.65 by root, Sun Nov 4 23:29:48 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
		75	/**/
		76
44	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
45	# ifdef CLOCK_MONOTONIC
46	# 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
47	# endif	102	# endif
48	#endif	103	#endif
49		104
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
60	#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	/**/
61		122
62	#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) */
63	#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 */
64		127
65	#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)
66		143
67	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
70		147
71	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74
75	static int have_monotonic; /* runtime */
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		149
81	/*****************************************************************************/	150	/*****************************************************************************/
82		151
83	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
84	ev_time (void)	186	ev_time (void)
85	{	187	{
86	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
87	struct timespec ts;	189	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	192	#else
91	struct timeval tv;	193	struct timeval tv;
92	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	196	#endif
95	}	197	}
96		198
97	static ev_tstamp	199	inline ev_tstamp
98	get_clock (void)	200	get_clock (void)
99	{	201	{
100	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
101	if (have_monotonic)	203	if (expect_true (have_monotonic))
102	{	204	{
103	struct timespec ts;	205	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	208	}
107	#endif	209	#endif
108		210
109	return ev_time ();	211	return ev_time ();
110	}	212	}
111		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
112	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
114	{ \	224	{ \
115	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	\
116	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	234	cur = newcnt; \
119	}	235	}
120		236
		237	#define array_free(stem, idx) \
		238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		239
121	/*****************************************************************************/	240	/*****************************************************************************/
122		241
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	242	static void
136	anfds_init (ANFD *base, int count)	243	anfds_init (ANFD *base, int count)
137	{	244	{
138	while (count--)	245	while (count--)
139	{	246	{
140	base->head = 0;	247	base->head = 0;
141	base->wev = base->rev = EV_NONE;	248	base->events = EV_NONE;
		249	base->reify = 0;
		250
142	++base;	251	++base;
143	}	252	}
144	}	253	}
145		254
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void	255	static void
156	event (W w, int events)	256	event (EV_P_ W w, int events)
157	{	257	{
158	if (w->active)	258	if (w->pending)
159	{	259	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	260	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		261	return;
164	}	262	}
165	}
166		263
		264	w->pending = ++pendingcnt [ABSPRI (w)];
		265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		266	pendings [ABSPRI (w)][w->pending - 1].w = w;
		267	pendings [ABSPRI (w)][w->pending - 1].events = events;
		268	}
		269
167	static void	270	static void
		271	queue_events (EV_P_ W *events, int eventcnt, int type)
		272	{
		273	int i;
		274
		275	for (i = 0; i < eventcnt; ++i)
		276	event (EV_A_ events [i], type);
		277	}
		278
		279	static void
168	fd_event (int fd, int events)	280	fd_event (EV_P_ int fd, int events)
169	{	281	{
170	ANFD *anfd = anfds + fd;	282	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	283	struct ev_io *w;
172		284
173	for (w = anfd->head; w; w = w->next)	285	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	286	{
175	int ev = w->events & events;	287	int ev = w->events & events;
176		288
177	if (ev)	289	if (ev)
178	event ((W)w, ev);	290	event (EV_A_ (W)w, ev);
179	}	291	}
180	}	292	}
181		293
		294	/*****************************************************************************/
		295
182	static void	296	static void
183	queue_events (W *events, int eventcnt, int type)	297	fd_reify (EV_P)
184	{	298	{
185	int i;	299	int i;
186		300
187	for (i = 0; i < eventcnt; ++i)	301	for (i = 0; i < fdchangecnt; ++i)
188	event (events [i], type);	302	{
		303	int fd = fdchanges [i];
		304	ANFD *anfd = anfds + fd;
		305	struct ev_io *w;
		306
		307	int events = 0;
		308
		309	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		310	events \|= w->events;
		311
		312	anfd->reify = 0;
		313
		314	method_modify (EV_A_ fd, anfd->events, events);
		315	anfd->events = events;
		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	}
189	}	344	}
190		345
191	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
192	static void	347	static void
193	fd_recheck ()	348	fd_ebadf (EV_P)
194	{	349	{
195	int fd;	350	int fd;
196		351
197	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	353	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	355	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	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	}
202	}	386	}
203		387
204	/*****************************************************************************/	388	/*****************************************************************************/
205		389
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	390	static void
213	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
214	{	392	{
215	WT w = timers [k];	393	WT w = heap [k];
216		394
217	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
218	{	396	{
219	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
221	k >>= 1;	399	k >>= 1;
222	}	400	}
223		401
224	timers [k] = w;	402	heap [k] = w;
225	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
226		404
227	}	405	}
228		406
229	static void	407	static void
230	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
231	{	409	{
232	WT w = timers [k];	410	WT w = heap [k];
233		411
234	while (k < (N >> 1))	412	while (k < (N >> 1))
235	{	413	{
236	int j = k << 1;	414	int j = k << 1;
237		415
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	417	++j;
240		418
241	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
242	break;	420	break;
243		421
244	timers [k] = timers [j];	422	heap [k] = heap [j];
245	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
246	k = j;	424	k = j;
247	}	425	}
248		426
249	timers [k] = w;	427	heap [k] = w;
250	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
251	}	429	}
252		430
253	/*****************************************************************************/	431	/*****************************************************************************/
254		432
255	typedef struct	433	typedef struct
256	{	434	{
257	struct ev_signal *head;	435	struct ev_watcher_list *head;
258	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
259	} ANSIG;	437	} ANSIG;
260		438
261	static ANSIG *signals;	439	static ANSIG *signals;
262	static int signalmax;	440	static int signalmax;
263		441
264	static int sigpipe [2];	442	static int sigpipe [2];
265	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	444	static struct ev_io sigev;
267		445
268	static void	446	static void
269	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
270	{	448	{
271	while (count--)	449	while (count--)
272	{	450	{
273	base->head = 0;	451	base->head = 0;
274	base->gotsig = 0;	452	base->gotsig = 0;
		453
275	++base;	454	++base;
276	}	455	}
277	}	456	}
278		457
279	static void	458	static void
…		…
281	{	460	{
282	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
283		462
284	if (!gotsig)	463	if (!gotsig)
285	{	464	{
		465	int old_errno = errno;
286	gotsig = 1;	466	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
288	}	469	}
289	}	470	}
290		471
291	static void	472	static void
292	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	474	{
294	struct ev_signal *w;	475	struct ev_watcher_list *w;
295	int sig;	476	int signum;
296		477
		478	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	479	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		480
300	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
302	{	483	{
303	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
304		485
305	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
307	}	488	}
308	}	489	}
309		490
310	static void	491	static void
311	siginit (void)	492	siginit (EV_P)
312	{	493	{
		494	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		497
316	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
319		502
320	evio_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	506	}
323		507
324	/*****************************************************************************/	508	/*****************************************************************************/
325		509
326	static struct ev_idle **idles;	510	#ifndef WIN32
327	static int idlemax, idlecnt;
328		511
329	static struct ev_check **checks;	512	static struct ev_child *childs [PID_HASHSIZE];
330	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	ev_priority (w) = ev_priority (sw); /* 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
331		550
332	/*****************************************************************************/	551	/*****************************************************************************/
333		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
334	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	557	# include "ev_epoll.c"
336	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
337	#if HAVE_SELECT	562	#if EV_USE_SELECT
338	# include "ev_select.c"	563	# include "ev_select.c"
339	#endif	564	#endif
340		565
341	int ev_init (int flags)	566	int
		567	ev_version_major (void)
342	{	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	{
343	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
344	{	602	{
345	struct timespec ts;	603	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	605	have_monotonic = 1;
348	}	606	}
349	#endif	607	#endif
350		608
351	ev_now = ev_time ();	609	rt_now = ev_time ();
352	now = get_clock ();	610	mn_now = get_clock ();
353	diff = ev_now - now;	611	now_floor = mn_now;
		612	rtmn_diff = rt_now - mn_now;
354		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	int i;
		643
		644	#if EV_USE_WIN32
		645	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		646	#endif
		647	#if EV_USE_KQUEUE
		648	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		649	#endif
		650	#if EV_USE_EPOLL
		651	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		652	#endif
		653	#if EV_USE_POLL
		654	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		655	#endif
		656	#if EV_USE_SELECT
		657	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		658	#endif
		659
		660	for (i = NUMPRI; i--; )
		661	array_free (pending, [i]);
		662
		663	array_free (fdchange, );
		664	array_free (timer, );
		665	array_free (periodic, );
		666	array_free (idle, );
		667	array_free (prepare, );
		668	array_free (check, );
		669
		670	method = 0;
		671	/TODO/
		672	}
		673
		674	void
		675	loop_fork (EV_P)
		676	{
		677	/TODO/
		678	#if EV_USE_EPOLL
		679	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		680	#endif
		681	#if EV_USE_KQUEUE
		682	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		683	#endif
		684	}
		685
		686	#if EV_MULTIPLICITY
		687	struct ev_loop *
		688	ev_loop_new (int methods)
		689	{
		690	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		691
		692	loop_init (EV_A_ methods);
		693
		694	if (ev_method (EV_A))
		695	return loop;
		696
		697	return 0;
		698	}
		699
		700	void
		701	ev_loop_destroy (EV_P)
		702	{
		703	loop_destroy (EV_A);
		704	free (loop);
		705	}
		706
		707	void
		708	ev_loop_fork (EV_P)
		709	{
		710	loop_fork (EV_A);
		711	}
		712
		713	#endif
		714
		715	#if EV_MULTIPLICITY
		716	struct ev_loop default_loop_struct;
		717	static struct ev_loop *default_loop;
		718
		719	struct ev_loop *
		720	#else
		721	static int default_loop;
		722
		723	int
		724	#endif
		725	ev_default_loop (int methods)
		726	{
		727	if (sigpipe [0] == sigpipe [1])
355	if (pipe (sigpipe))	728	if (pipe (sigpipe))
356	return 0;	729	return 0;
357		730
358	ev_method = EVMETHOD_NONE;	731	if (!default_loop)
359	#if HAVE_EPOLL
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
361	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365
366	if (ev_method)
367	{	732	{
		733	#if EV_MULTIPLICITY
		734	struct ev_loop *loop = default_loop = &default_loop_struct;
		735	#else
		736	default_loop = 1;
		737	#endif
		738
		739	loop_init (EV_A_ methods);
		740
		741	if (ev_method (EV_A))
		742	{
368	evw_init (&sigev, sigcb);	743	ev_watcher_init (&sigev, sigcb);
		744	ev_set_priority (&sigev, EV_MAXPRI);
369	siginit ();	745	siginit (EV_A);
370	}
371		746
372	return ev_method;	747	#ifndef WIN32
373	}	748	ev_signal_init (&childev, childcb, SIGCHLD);
374		749	ev_set_priority (&childev, EV_MAXPRI);
375	/*****************************************************************************/	750	ev_signal_start (EV_A_ &childev);
376		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	void ev_prefork (void)
378	{
379	/* nop */
380	}
381
382	void ev_postfork_parent (void)
383	{
384	/* nop */
385	}
386
387	void ev_postfork_child (void)
388	{
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();
392	#endif	752	#endif
		753	}
		754	else
		755	default_loop = 0;
		756	}
393		757
		758	return default_loop;
		759	}
		760
		761	void
		762	ev_default_destroy (void)
		763	{
		764	#if EV_MULTIPLICITY
		765	struct ev_loop *loop = default_loop;
		766	#endif
		767
		768	ev_ref (EV_A); /* child watcher */
		769	ev_signal_stop (EV_A_ &childev);
		770
		771	ev_ref (EV_A); /* signal watcher */
394	evio_stop (&sigev);	772	ev_io_stop (EV_A_ &sigev);
		773
		774	close (sigpipe [0]); sigpipe [0] = 0;
		775	close (sigpipe [1]); sigpipe [1] = 0;
		776
		777	loop_destroy (EV_A);
		778	}
		779
		780	void
		781	ev_default_fork (void)
		782	{
		783	#if EV_MULTIPLICITY
		784	struct ev_loop *loop = default_loop;
		785	#endif
		786
		787	loop_fork (EV_A);
		788
		789	ev_io_stop (EV_A_ &sigev);
395	close (sigpipe [0]);	790	close (sigpipe [0]);
396	close (sigpipe [1]);	791	close (sigpipe [1]);
397	pipe (sigpipe);	792	pipe (sigpipe);
		793
		794	ev_ref (EV_A); /* signal watcher */
398	siginit ();	795	siginit (EV_A);
399	}	796	}
400		797
401	/*****************************************************************************/	798	/*****************************************************************************/
402		799
403	static void	800	static void
404	fd_reify (void)	801	call_pending (EV_P)
405	{	802	{
406	int i;	803	int pri;
407		804
408	for (i = 0; i < fdchangecnt; ++i)	805	for (pri = NUMPRI; pri--; )
409	{	806	while (pendingcnt [pri])
410	int fd = fdchanges [i];
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413
414	int wev = 0;
415
416	for (w = anfd->head; w; w = w->next)
417	wev \|= w->events;
418
419	if (anfd->wev != wev)
420	{	807	{
421	method_modify (fd, anfd->wev, wev);
422	anfd->wev = wev;
423	}
424	}
425
426	fdchangecnt = 0;
427	}
428
429	static void
430	call_pending ()
431	{
432	while (pendingcnt)
433	{
434	ANPENDING *p = pendings + --pendingcnt;	808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		809
436	if (p->w)	810	if (p->w)
437	{	811	{
438	p->w->pending = 0;	812	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	813
		814	((void (*)(EV_P_ W, int))p->w->cb) (EV_A_ p->w, p->events);
440	}	815	}
441	}	816	}
442	}	817	}
443		818
444	static void	819	static void
445	timers_reify ()	820	timers_reify (EV_P)
446	{	821	{
447	while (timercnt && timers [0]->at <= now)	822	while (timercnt && ((WT)timers [0])->at <= mn_now)
448	{	823	{
449	struct ev_timer *w = timers [0];	824	struct ev_timer *w = timers [0];
450		825
451	event ((W)w, EV_TIMEOUT);	826	assert (("inactive timer on timer heap detected", ev_is_active (w)));
452		827
453	/* first reschedule or stop timer */	828	/* first reschedule or stop timer */
454	if (w->repeat)	829	if (w->repeat)
455	{	830	{
		831	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	832	((WT)w)->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	833	downheap ((WT *)timers, timercnt, 0);
459	}	834	}
460	else	835	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	836	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		837
		838	event (EV_A_ (W)w, EV_TIMEOUT);
		839	}
		840	}
		841
465	static void	842	static void
466	periodics_reify ()	843	periodics_reify (EV_P)
467	{	844	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	845	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
469	{	846	{
470	struct ev_periodic *w = periodics [0];	847	struct ev_periodic *w = periodics [0];
		848
		849	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
471		850
472	/* first reschedule or stop timer */	851	/* first reschedule or stop timer */
473	if (w->interval)	852	if (w->interval)
474	{	853	{
475	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	854	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
476	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	855	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
477	downheap ((WT *)periodics, periodiccnt, 0);	856	downheap ((WT *)periodics, periodiccnt, 0);
478	}	857	}
479	else	858	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	859	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		860
482	event ((W)w, EV_TIMEOUT);	861	event (EV_A_ (W)w, EV_PERIODIC);
483	}	862	}
484	}	863	}
485		864
486	static void	865	static void
487	periodics_reschedule (ev_tstamp diff)	866	periodics_reschedule (EV_P)
488	{	867	{
489	int i;	868	int i;
490		869
491	/* adjust periodics after time jump */	870	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	871	for (i = 0; i < periodiccnt; ++i)
493	{	872	{
494	struct ev_periodic *w = periodics [i];	873	struct ev_periodic *w = periodics [i];
495		874
496	if (w->interval)	875	if (w->interval)
497	{	876	{
498	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	877	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
499		878
500	if (fabs (diff) >= 1e-4)	879	if (fabs (diff) >= 1e-4)
501	{	880	{
502	evperiodic_stop (w);	881	ev_periodic_stop (EV_A_ w);
503	evperiodic_start (w);	882	ev_periodic_start (EV_A_ w);
504		883
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	884	i = 0; /* restart loop, inefficient, but time jumps should be rare */
506	}	885	}
507	}	886	}
508	}	887	}
509	}	888	}
510		889
		890	inline int
		891	time_update_monotonic (EV_P)
		892	{
		893	mn_now = get_clock ();
		894
		895	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		896	{
		897	rt_now = rtmn_diff + mn_now;
		898	return 0;
		899	}
		900	else
		901	{
		902	now_floor = mn_now;
		903	rt_now = ev_time ();
		904	return 1;
		905	}
		906	}
		907
511	static void	908	static void
512	time_update ()	909	time_update (EV_P)
513	{	910	{
514	int i;	911	int i;
515		912
516	ev_now = ev_time ();	913	#if EV_USE_MONOTONIC
517
518	if (have_monotonic)	914	if (expect_true (have_monotonic))
519	{	915	{
520	ev_tstamp odiff = diff;	916	if (time_update_monotonic (EV_A))
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	917	{
524	now = get_clock ();	918	ev_tstamp odiff = rtmn_diff;
		919
		920	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		921	{
525	diff = ev_now - now;	922	rtmn_diff = rt_now - mn_now;
526		923
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)	924	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
528	return; /* all is well */	925	return; /* all is well */
529		926
530	ev_now = ev_time ();	927	rt_now = ev_time ();
		928	mn_now = get_clock ();
		929	now_floor = mn_now;
		930	}
		931
		932	periodics_reschedule (EV_A);
		933	/* no timer adjustment, as the monotonic clock doesn't jump */
		934	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
531	}	935	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}	936	}
536	else	937	else
		938	#endif
537	{	939	{
538	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	940	rt_now = ev_time ();
		941
		942	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
539	{	943	{
540	periodics_reschedule (ev_now - now);	944	periodics_reschedule (EV_A);
541		945
542	/* adjust timers. this is easy, as the offset is the same for all */	946	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	947	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	948	((WT)timers [i])->at += rt_now - mn_now;
545	}	949	}
546		950
547	now = ev_now;	951	mn_now = rt_now;
548	}	952	}
549	}	953	}
550		954
551	int ev_loop_done;	955	void
		956	ev_ref (EV_P)
		957	{
		958	++activecnt;
		959	}
552		960
		961	void
		962	ev_unref (EV_P)
		963	{
		964	--activecnt;
		965	}
		966
		967	static int loop_done;
		968
		969	void
553	void ev_loop (int flags)	970	ev_loop (EV_P_ int flags)
554	{	971	{
555	double block;	972	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	973	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
557
558	if (checkcnt)
559	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);
561	call_pending ();
562	}
563		974
564	do	975	do
565	{	976	{
		977	/* queue check watchers (and execute them) */
		978	if (expect_false (preparecnt))
		979	{
		980	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		981	call_pending (EV_A);
		982	}
		983
566	/* update fd-related kernel structures */	984	/* update fd-related kernel structures */
567	fd_reify ();	985	fd_reify (EV_A);
568		986
569	/* calculate blocking time */	987	/* calculate blocking time */
570		988
571	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	989	/* we only need this for !monotonic clockor timers, but as we basically
		990	always have timers, we just calculate it always */
		991	#if EV_USE_MONOTONIC
		992	if (expect_true (have_monotonic))
		993	time_update_monotonic (EV_A);
		994	else
		995	#endif
		996	{
572	ev_now = ev_time ();	997	rt_now = ev_time ();
		998	mn_now = rt_now;
		999	}
573		1000
574	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1001	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
575	block = 0.;	1002	block = 0.;
576	else	1003	else
577	{	1004	{
578	block = MAX_BLOCKTIME;	1005	block = MAX_BLOCKTIME;
579		1006
580	if (timercnt)	1007	if (timercnt)
581	{	1008	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1009	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
583	if (block > to) block = to;	1010	if (block > to) block = to;
584	}	1011	}
585		1012
586	if (periodiccnt)	1013	if (periodiccnt)
587	{	1014	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1015	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
589	if (block > to) block = to;	1016	if (block > to) block = to;
590	}	1017	}
591		1018
592	if (block < 0.) block = 0.;	1019	if (block < 0.) block = 0.;
593	}	1020	}
594		1021
595	method_poll (block);	1022	method_poll (EV_A_ block);
596		1023
597	/* update ev_now, do magic */	1024	/* update rt_now, do magic */
598	time_update ();	1025	time_update (EV_A);
599		1026
600	/* queue pending timers and reschedule them */	1027	/* queue pending timers and reschedule them */
		1028	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	1029	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		1030
604	/* queue idle watchers unless io or timers are pending */	1031	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	1032	if (!pendingcnt)
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	1033	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		1034
608	/* queue check and possibly idle watchers */	1035	/* queue check watchers, to be executed first */
		1036	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	1037	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		1038
611	call_pending ();	1039	call_pending (EV_A);
612	}	1040	}
613	while (!ev_loop_done);	1041	while (activecnt && !loop_done);
614		1042
615	if (ev_loop_done != 2)	1043	if (loop_done != 2)
616	ev_loop_done = 0;	1044	loop_done = 0;
		1045	}
		1046
		1047	void
		1048	ev_unloop (EV_P_ int how)
		1049	{
		1050	loop_done = how;
617	}	1051	}
618		1052
619	/*****************************************************************************/	1053	/*****************************************************************************/
620		1054
621	static void	1055	inline void
622	wlist_add (WL *head, WL elem)	1056	wlist_add (WL *head, WL elem)
623	{	1057	{
624	elem->next = *head;	1058	elem->next = *head;
625	*head = elem;	1059	*head = elem;
626	}	1060	}
627		1061
628	static void	1062	inline void
629	wlist_del (WL *head, WL elem)	1063	wlist_del (WL *head, WL elem)
630	{	1064	{
631	while (*head)	1065	while (*head)
632	{	1066	{
633	if (*head == elem)	1067	if (*head == elem)
…		…
638		1072
639	head = &(*head)->next;	1073	head = &(*head)->next;
640	}	1074	}
641	}	1075	}
642		1076
643	static void	1077	inline void
644	ev_clear (W w)	1078	ev_clear_pending (EV_P_ W w)
645	{	1079	{
646	if (w->pending)	1080	if (w->pending)
647	{	1081	{
648	pendings [w->pending - 1].w = 0;	1082	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	1083	w->pending = 0;
650	}	1084	}
651	}	1085	}
652		1086
653	static void	1087	inline void
654	ev_start (W w, int active)	1088	ev_start (EV_P_ W w, int active)
655	{	1089	{
		1090	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1091	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1092
656	w->active = active;	1093	w->active = active;
		1094	ev_ref (EV_A);
657	}	1095	}
658		1096
659	static void	1097	inline void
660	ev_stop (W w)	1098	ev_stop (EV_P_ W w)
661	{	1099	{
		1100	ev_unref (EV_A);
662	w->active = 0;	1101	w->active = 0;
663	}	1102	}
664		1103
665	/*****************************************************************************/	1104	/*****************************************************************************/
666		1105
667	void	1106	void
668	evio_start (struct ev_io *w)	1107	ev_io_start (EV_P_ struct ev_io *w)
669	{	1108	{
		1109	int fd = w->fd;
		1110
670	if (ev_is_active (w))	1111	if (ev_is_active (w))
671	return;	1112	return;
672		1113
673	int fd = w->fd;	1114	assert (("ev_io_start called with negative fd", fd >= 0));
674		1115
675	ev_start ((W)w, 1);	1116	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1117	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1118	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		1119
679	++fdchangecnt;	1120	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	1121	}
683		1122
684	void	1123	void
685	evio_stop (struct ev_io *w)	1124	ev_io_stop (EV_P_ struct ev_io *w)
686	{	1125	{
687	ev_clear ((W)w);	1126	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	1127	if (!ev_is_active (w))
689	return;	1128	return;
690		1129
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1130	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	1131	ev_stop (EV_A_ (W)w);
693		1132
694	++fdchangecnt;	1133	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1134	}
698		1135
699	void	1136	void
700	evtimer_start (struct ev_timer *w)	1137	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1138	{
702	if (ev_is_active (w))	1139	if (ev_is_active (w))
703	return;	1140	return;
704		1141
705	w->at += now;	1142	((WT)w)->at += mn_now;
706		1143
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1144	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1145
709	ev_start ((W)w, ++timercnt);	1146	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1147	array_needsize (timers, timermax, timercnt, );
711	timers [timercnt - 1] = w;	1148	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1149	upheap ((WT *)timers, timercnt - 1);
713	}
714		1150
		1151	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1152	}
		1153
715	void	1154	void
716	evtimer_stop (struct ev_timer *w)	1155	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1156	{
718	ev_clear ((W)w);	1157	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1158	if (!ev_is_active (w))
720	return;	1159	return;
721		1160
		1161	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1162
722	if (w->active < timercnt--)	1163	if (((W)w)->active < timercnt--)
723	{	1164	{
724	timers [w->active - 1] = timers [timercnt];	1165	timers [((W)w)->active - 1] = timers [timercnt];
725	downheap ((WT *)timers, timercnt, w->active - 1);	1166	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
726	}	1167	}
727		1168
728	w->at = w->repeat;	1169	((WT)w)->at = w->repeat;
729		1170
730	ev_stop ((W)w);	1171	ev_stop (EV_A_ (W)w);
731	}	1172	}
732		1173
733	void	1174	void
734	evtimer_again (struct ev_timer *w)	1175	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1176	{
736	if (ev_is_active (w))	1177	if (ev_is_active (w))
737	{	1178	{
738	if (w->repeat)	1179	if (w->repeat)
739	{	1180	{
740	w->at = now + w->repeat;	1181	((WT)w)->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
742	}	1183	}
743	else	1184	else
744	evtimer_stop (w);	1185	ev_timer_stop (EV_A_ w);
745	}	1186	}
746	else if (w->repeat)	1187	else if (w->repeat)
747	evtimer_start (w);	1188	ev_timer_start (EV_A_ w);
748	}	1189	}
749		1190
750	void	1191	void
751	evperiodic_start (struct ev_periodic *w)	1192	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1193	{
753	if (ev_is_active (w))	1194	if (ev_is_active (w))
754	return;	1195	return;
755		1196
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1197	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
757		1198
758	/* this formula differs from the one in periodic_reify because we do not always round up */	1199	/* this formula differs from the one in periodic_reify because we do not always round up */
759	if (w->interval)	1200	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1201	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
761		1202
762	ev_start ((W)w, ++periodiccnt);	1203	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1204	array_needsize (periodics, periodicmax, periodiccnt, );
764	periodics [periodiccnt - 1] = w;	1205	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1206	upheap ((WT *)periodics, periodiccnt - 1);
766	}
767		1207
		1208	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1209	}
		1210
768	void	1211	void
769	evperiodic_stop (struct ev_periodic *w)	1212	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1213	{
771	ev_clear ((W)w);	1214	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1215	if (!ev_is_active (w))
773	return;	1216	return;
774		1217
		1218	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1219
775	if (w->active < periodiccnt--)	1220	if (((W)w)->active < periodiccnt--)
776	{	1221	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1222	periodics [((W)w)->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1223	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
779	}	1224	}
780		1225
781	ev_stop ((W)w);	1226	ev_stop (EV_A_ (W)w);
782	}	1227	}
783		1228
784	void	1229	void
785	evsignal_start (struct ev_signal *w)	1230	ev_idle_start (EV_P_ struct ev_idle *w)
786	{	1231	{
787	if (ev_is_active (w))	1232	if (ev_is_active (w))
788	return;	1233	return;
789		1234
		1235	ev_start (EV_A_ (W)w, ++idlecnt);
		1236	array_needsize (idles, idlemax, idlecnt, );
		1237	idles [idlecnt - 1] = w;
		1238	}
		1239
		1240	void
		1241	ev_idle_stop (EV_P_ struct ev_idle *w)
		1242	{
		1243	ev_clear_pending (EV_A_ (W)w);
		1244	if (ev_is_active (w))
		1245	return;
		1246
		1247	idles [((W)w)->active - 1] = idles [--idlecnt];
		1248	ev_stop (EV_A_ (W)w);
		1249	}
		1250
		1251	void
		1252	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1253	{
		1254	if (ev_is_active (w))
		1255	return;
		1256
		1257	ev_start (EV_A_ (W)w, ++preparecnt);
		1258	array_needsize (prepares, preparemax, preparecnt, );
		1259	prepares [preparecnt - 1] = w;
		1260	}
		1261
		1262	void
		1263	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1264	{
		1265	ev_clear_pending (EV_A_ (W)w);
		1266	if (ev_is_active (w))
		1267	return;
		1268
		1269	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1270	ev_stop (EV_A_ (W)w);
		1271	}
		1272
		1273	void
		1274	ev_check_start (EV_P_ struct ev_check *w)
		1275	{
		1276	if (ev_is_active (w))
		1277	return;
		1278
		1279	ev_start (EV_A_ (W)w, ++checkcnt);
		1280	array_needsize (checks, checkmax, checkcnt, );
		1281	checks [checkcnt - 1] = w;
		1282	}
		1283
		1284	void
		1285	ev_check_stop (EV_P_ struct ev_check *w)
		1286	{
		1287	ev_clear_pending (EV_A_ (W)w);
		1288	if (ev_is_active (w))
		1289	return;
		1290
		1291	checks [((W)w)->active - 1] = checks [--checkcnt];
		1292	ev_stop (EV_A_ (W)w);
		1293	}
		1294
		1295	#ifndef SA_RESTART
		1296	# define SA_RESTART 0
		1297	#endif
		1298
		1299	void
		1300	ev_signal_start (EV_P_ struct ev_signal *w)
		1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1309
790	ev_start ((W)w, 1);	1310	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1311	array_needsize (signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1312	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1313
794	if (!w->next)	1314	if (!((WL)w)->next)
795	{	1315	{
796	struct sigaction sa;	1316	struct sigaction sa;
797	sa.sa_handler = sighandler;	1317	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1318	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1319	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1320	sigaction (w->signum, &sa, 0);
801	}	1321	}
802	}	1322	}
803		1323
804	void	1324	void
805	evsignal_stop (struct ev_signal *w)	1325	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1326	{
807	ev_clear ((W)w);	1327	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1328	if (!ev_is_active (w))
809	return;	1329	return;
810		1330
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1331	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1332	ev_stop (EV_A_ (W)w);
813		1333
814	if (!signals [w->signum - 1].head)	1334	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1335	signal (w->signum, SIG_DFL);
816	}	1336	}
817		1337
818	void evidle_start (struct ev_idle *w)	1338	void
		1339	ev_child_start (EV_P_ struct ev_child *w)
819	{	1340	{
		1341	#if EV_MULTIPLICITY
		1342	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1343	#endif
820	if (ev_is_active (w))	1344	if (ev_is_active (w))
821	return;	1345	return;
822		1346
823	ev_start ((W)w, ++idlecnt);	1347	ev_start (EV_A_ (W)w, 1);
824	array_needsize (idles, idlemax, idlecnt, );	1348	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
825	idles [idlecnt - 1] = w;
826	}	1349	}
827		1350
828	void evidle_stop (struct ev_idle *w)	1351	void
		1352	ev_child_stop (EV_P_ struct ev_child *w)
829	{	1353	{
830	ev_clear ((W)w);	1354	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1355	if (ev_is_active (w))
832	return;	1356	return;
833		1357
834	idles [w->active - 1] = idles [--idlecnt];	1358	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
835	ev_stop ((W)w);	1359	ev_stop (EV_A_ (W)w);
836	}
837
838	void evcheck_start (struct ev_check *w)
839	{
840	if (ev_is_active (w))
841	return;
842
843	ev_start ((W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );
845	checks [checkcnt - 1] = w;
846	}
847
848	void evcheck_stop (struct ev_check *w)
849	{
850	ev_clear ((W)w);
851	if (ev_is_active (w))
852	return;
853
854	checks [w->active - 1] = checks [--checkcnt];
855	ev_stop ((W)w);
856	}	1360	}
857		1361
858	/*****************************************************************************/	1362	/*****************************************************************************/
859		1363
860	struct ev_once	1364	struct ev_once
…		…
864	void (cb)(int revents, void arg);	1368	void (cb)(int revents, void arg);
865	void *arg;	1369	void *arg;
866	};	1370	};
867		1371
868	static void	1372	static void
869	once_cb (struct ev_once *once, int revents)	1373	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1374	{
871	void (cb)(int revents, void arg) = once->cb;	1375	void (cb)(int revents, void arg) = once->cb;
872	void *arg = once->arg;	1376	void *arg = once->arg;
873		1377
874	evio_stop (&once->io);	1378	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1379	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1380	free (once);
877		1381
878	cb (revents, arg);	1382	cb (revents, arg);
879	}	1383	}
880		1384
881	static void	1385	static void
882	once_cb_io (struct ev_io *w, int revents)	1386	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1387	{
884	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1388	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
885	}	1389	}
886		1390
887	static void	1391	static void
888	once_cb_to (struct ev_timer *w, int revents)	1392	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1393	{
890	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1394	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
891	}	1395	}
892		1396
893	void	1397	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1398	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
895	{	1399	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1400	struct ev_once *once = malloc (sizeof (struct ev_once));
897		1401
898	if (!once)	1402	if (!once)
899	cb (EV_ERROR, arg);	1403	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
900	else	1404	else
901	{	1405	{
902	once->cb = cb;	1406	once->cb = cb;
903	once->arg = arg;	1407	once->arg = arg;
904		1408
905	evw_init (&once->io, once_cb_io);	1409	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1410	if (fd >= 0)
908	{	1411	{
909	evio_set (&once->io, fd, events);	1412	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1413	ev_io_start (EV_A_ &once->io);
911	}	1414	}
912		1415
913	evw_init (&once->to, once_cb_to);	1416	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1417	if (timeout >= 0.)
916	{	1418	{
917	evtimer_set (&once->to, timeout, 0.);	1419	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1420	ev_timer_start (EV_A_ &once->to);
919	}	1421	}
920	}	1422	}
921	}	1423	}
922		1424
923	/*****************************************************************************/
924
925	#if 0
926
927	struct ev_io wio;
928
929	static void
930	sin_cb (struct ev_io *w, int revents)
931	{
932	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
933	}
934
935	static void
936	ocb (struct ev_timer *w, int revents)
937	{
938	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
939	evtimer_stop (w);
940	evtimer_start (w);
941	}
942
943	static void
944	scb (struct ev_signal *w, int revents)
945	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);
948	evio_start (&wio);
949	}
950
951	static void
952	gcb (struct ev_signal *w, int revents)
953	{
954	fprintf (stderr, "generic %x\n", revents);
955
956	}
957
958	int main (void)
959	{
960	ev_init (0);
961
962	evio_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);
964
965	struct ev_timer t[10000];
966
967	#if 0
968	int i;
969	for (i = 0; i < 10000; ++i)
970	{
971	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);
975	if (drand48 () < 0.5)
976	evtimer_stop (w);
977	}
978	#endif
979
980	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);
983
984	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);
987
988	struct ev_check cw;
989	evcheck_init (&cw, gcb);
990	evcheck_start (&cw);
991
992	struct ev_idle iw;
993	evidle_init (&iw, gcb);
994	evidle_start (&iw);
995
996	ev_loop (0);
997
998	return 0;
999	}
1000
1001	#endif
1002
1003
1004
1005

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Comparing libev/ev.c (file contents): Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs. Revision 1.65 by root, Sun Nov 4 23:29:48 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.65 by root, Sun Nov 4 23:29:48 2007 UTC