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

Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.58 by root, Sun Nov 4 16:52:52 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_EMBED
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
41	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
42	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
43	#include <sys/time.h>	50	#include <sys/time.h>
44	#include <time.h>	51	#include <time.h>
45		52
		53	/**/
		54
46	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
47	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
49	# endif	84	#endif
50	#endif
51		85
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	86	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
62	#endif	89	#endif
		90
		91	/**/
63		92
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		97
		98	#ifndef EV_EMBED
68	#include "ev.h"	99	# include "ev.h"
		100	#endif
		101
		102	#if __GNUC__ >= 3
		103	# define expect(expr,value) __builtin_expect ((expr),(value))
		104	# define inline inline
		105	#else
		106	# define expect(expr,value) (expr)
		107	# define inline static
		108	#endif
		109
		110	#define expect_false(expr) expect ((expr) != 0, 0)
		111	#define expect_true(expr) expect ((expr) != 0, 1)
		112
		113	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		114	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		115
70	typedef struct ev_watcher *W;	116	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	117	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	118	typedef struct ev_watcher_time *WT;
73		119
74	static ev_tstamp now, diff; /* monotonic clock */	120	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77
78	static int have_monotonic; /* runtime */
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		121
84	/*****************************************************************************/	122	/*****************************************************************************/
85		123
86	ev_tstamp	124	typedef struct
		125	{
		126	struct ev_watcher_list *head;
		127	unsigned char events;
		128	unsigned char reify;
		129	} ANFD;
		130
		131	typedef struct
		132	{
		133	W w;
		134	int events;
		135	} ANPENDING;
		136
		137	#if EV_MULTIPLICITY
		138
		139	struct ev_loop
		140	{
		141	# define VAR(name,decl) decl;
		142	# include "ev_vars.h"
		143	};
		144	# undef VAR
		145	# include "ev_wrap.h"
		146
		147	#else
		148
		149	# define VAR(name,decl) static decl;
		150	# include "ev_vars.h"
		151	# undef VAR
		152
		153	#endif
		154
		155	/*****************************************************************************/
		156
		157	inline ev_tstamp
87	ev_time (void)	158	ev_time (void)
88	{	159	{
89	#if HAVE_REALTIME	160	#if EV_USE_REALTIME
90	struct timespec ts;	161	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	162	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	163	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	164	#else
94	struct timeval tv;	165	struct timeval tv;
95	gettimeofday (&tv, 0);	166	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	167	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	168	#endif
98	}	169	}
99		170
100	static ev_tstamp	171	inline ev_tstamp
101	get_clock (void)	172	get_clock (void)
102	{	173	{
103	#if HAVE_MONOTONIC	174	#if EV_USE_MONOTONIC
104	if (have_monotonic)	175	if (expect_true (have_monotonic))
105	{	176	{
106	struct timespec ts;	177	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	178	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	179	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	180	}
110	#endif	181	#endif
111		182
112	return ev_time ();	183	return ev_time ();
113	}	184	}
114		185
		186	ev_tstamp
		187	ev_now (EV_P)
		188	{
		189	return rt_now;
		190	}
		191
		192	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		193
115	#define array_needsize(base,cur,cnt,init) \	194	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	195	if (expect_false ((cnt) > cur)) \
117	{ \	196	{ \
118	int newcnt = cur; \	197	int newcnt = cur; \
119	do \	198	do \
120	{ \	199	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	200	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	201	} \
123	while ((cnt) > newcnt); \	202	while ((cnt) > newcnt); \
124	\	203	\
125	base = realloc (base, sizeof (base) (newcnt)); \	204	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	205	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	206	cur = newcnt; \
128	}	207	}
129		208
130	/*****************************************************************************/	209	/*****************************************************************************/
131		210
132	typedef struct
133	{
134	struct ev_io *head;
135	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	211	static void
145	anfds_init (ANFD *base, int count)	212	anfds_init (ANFD *base, int count)
146	{	213	{
147	while (count--)	214	while (count--)
148	{	215	{
149	base->head = 0;	216	base->head = 0;
150	base->wev = base->rev = EV_NONE;	217	base->events = EV_NONE;
		218	base->reify = 0;
		219
151	++base;	220	++base;
152	}	221	}
153	}	222	}
154		223
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	224	static void
165	event (W w, int events)	225	event (EV_P_ W w, int events)
166	{	226	{
167	if (w->active)	227	if (w->pending)
168	{	228	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	229	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		230	return;
173	}	231	}
174	}
175		232
		233	w->pending = ++pendingcnt [ABSPRI (w)];
		234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		235	pendings [ABSPRI (w)][w->pending - 1].w = w;
		236	pendings [ABSPRI (w)][w->pending - 1].events = events;
		237	}
		238
176	static void	239	static void
		240	queue_events (EV_P_ W *events, int eventcnt, int type)
		241	{
		242	int i;
		243
		244	for (i = 0; i < eventcnt; ++i)
		245	event (EV_A_ events [i], type);
		246	}
		247
		248	static void
177	fd_event (int fd, int events)	249	fd_event (EV_P_ int fd, int events)
178	{	250	{
179	ANFD *anfd = anfds + fd;	251	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	252	struct ev_io *w;
181		253
182	for (w = anfd->head; w; w = w->next)	254	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
183	{	255	{
184	int ev = w->events & events;	256	int ev = w->events & events;
185		257
186	if (ev)	258	if (ev)
187	event ((W)w, ev);	259	event (EV_A_ (W)w, ev);
188	}	260	}
189	}	261	}
190		262
		263	/*****************************************************************************/
		264
191	static void	265	static void
192	queue_events (W *events, int eventcnt, int type)	266	fd_reify (EV_P)
193	{	267	{
194	int i;	268	int i;
195		269
196	for (i = 0; i < eventcnt; ++i)	270	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	271	{
		272	int fd = fdchanges [i];
		273	ANFD *anfd = anfds + fd;
		274	struct ev_io *w;
		275
		276	int events = 0;
		277
		278	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		279	events \|= w->events;
		280
		281	anfd->reify = 0;
		282
		283	if (anfd->events != events)
		284	{
		285	method_modify (EV_A_ fd, anfd->events, events);
		286	anfd->events = events;
		287	}
		288	}
		289
		290	fdchangecnt = 0;
		291	}
		292
		293	static void
		294	fd_change (EV_P_ int fd)
		295	{
		296	if (anfds [fd].reify \|\| fdchangecnt < 0)
		297	return;
		298
		299	anfds [fd].reify = 1;
		300
		301	++fdchangecnt;
		302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		303	fdchanges [fdchangecnt - 1] = fd;
		304	}
		305
		306	static void
		307	fd_kill (EV_P_ int fd)
		308	{
		309	struct ev_io *w;
		310
		311	while ((w = (struct ev_io *)anfds [fd].head))
		312	{
		313	ev_io_stop (EV_A_ w);
		314	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		315	}
198	}	316	}
199		317
200	/* called on EBADF to verify fds */	318	/* called on EBADF to verify fds */
201	static void	319	static void
202	fd_recheck ()	320	fd_ebadf (EV_P)
203	{	321	{
204	int fd;	322	int fd;
205		323
206	for (fd = 0; fd < anfdmax; ++fd)	324	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	325	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)	327	fd_kill (EV_A_ fd);
210	evio_stop (anfds [fd].head);	328	}
		329
		330	/* called on ENOMEM in select/poll to kill some fds and retry */
		331	static void
		332	fd_enomem (EV_P)
		333	{
		334	int fd = anfdmax;
		335
		336	while (fd--)
		337	if (anfds [fd].events)
		338	{
		339	close (fd);
		340	fd_kill (EV_A_ fd);
		341	return;
		342	}
		343	}
		344
		345	/* susually called after fork if method needs to re-arm all fds from scratch */
		346	static void
		347	fd_rearm_all (EV_P)
		348	{
		349	int fd;
		350
		351	/* this should be highly optimised to not do anything but set a flag */
		352	for (fd = 0; fd < anfdmax; ++fd)
		353	if (anfds [fd].events)
		354	{
		355	anfds [fd].events = 0;
		356	fd_change (fd);
		357	}
211	}	358	}
212		359
213	/*****************************************************************************/	360	/*****************************************************************************/
214		361
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void	362	static void
222	upheap (WT *timers, int k)	363	upheap (WT *heap, int k)
223	{	364	{
224	WT w = timers [k];	365	WT w = heap [k];
225		366
226	while (k && timers [k >> 1]->at > w->at)	367	while (k && heap [k >> 1]->at > w->at)
227	{	368	{
228	timers [k] = timers [k >> 1];	369	heap [k] = heap [k >> 1];
229	timers [k]->active = k + 1;	370	heap [k]->active = k + 1;
230	k >>= 1;	371	k >>= 1;
231	}	372	}
232		373
233	timers [k] = w;	374	heap [k] = w;
234	timers [k]->active = k + 1;	375	heap [k]->active = k + 1;
235		376
236	}	377	}
237		378
238	static void	379	static void
239	downheap (WT *timers, int N, int k)	380	downheap (WT *heap, int N, int k)
240	{	381	{
241	WT w = timers [k];	382	WT w = heap [k];
242		383
243	while (k < (N >> 1))	384	while (k < (N >> 1))
244	{	385	{
245	int j = k << 1;	386	int j = k << 1;
246		387
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
248	++j;	389	++j;
249		390
250	if (w->at <= timers [j]->at)	391	if (w->at <= heap [j]->at)
251	break;	392	break;
252		393
253	timers [k] = timers [j];	394	heap [k] = heap [j];
254	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
255	k = j;	396	k = j;
256	}	397	}
257		398
258	timers [k] = w;	399	heap [k] = w;
259	timers [k]->active = k + 1;	400	heap [k]->active = k + 1;
260	}	401	}
261		402
262	/*****************************************************************************/	403	/*****************************************************************************/
263		404
264	typedef struct	405	typedef struct
265	{	406	{
266	struct ev_signal *head;	407	struct ev_watcher_list *head;
267	sig_atomic_t gotsig;	408	sig_atomic_t volatile gotsig;
268	} ANSIG;	409	} ANSIG;
269		410
270	static ANSIG *signals;	411	static ANSIG *signals;
271	static int signalmax;	412	static int signalmax;
272		413
273	static int sigpipe [2];	414	static int sigpipe [2];
274	static sig_atomic_t gotsig;	415	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;
276		416
277	static void	417	static void
278	signals_init (ANSIG *base, int count)	418	signals_init (ANSIG *base, int count)
279	{	419	{
280	while (count--)	420	while (count--)
281	{	421	{
282	base->head = 0;	422	base->head = 0;
283	base->gotsig = 0;	423	base->gotsig = 0;
		424
284	++base;	425	++base;
285	}	426	}
286	}	427	}
287		428
288	static void	429	static void
…		…
290	{	431	{
291	signals [signum - 1].gotsig = 1;	432	signals [signum - 1].gotsig = 1;
292		433
293	if (!gotsig)	434	if (!gotsig)
294	{	435	{
		436	int old_errno = errno;
295	gotsig = 1;	437	gotsig = 1;
296	write (sigpipe [1], &gotsig, 1);	438	write (sigpipe [1], &signum, 1);
		439	errno = old_errno;
297	}	440	}
298	}	441	}
299		442
300	static void	443	static void
301	sigcb (struct ev_io *iow, int revents)	444	sigcb (EV_P_ struct ev_io *iow, int revents)
302	{	445	{
303	struct ev_signal *w;	446	struct ev_watcher_list *w;
304	int sig;	447	int signum;
305		448
		449	read (sigpipe [0], &revents, 1);
306	gotsig = 0;	450	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		451
309	for (sig = signalmax; sig--; )	452	for (signum = signalmax; signum--; )
310	if (signals [sig].gotsig)	453	if (signals [signum].gotsig)
311	{	454	{
312	signals [sig].gotsig = 0;	455	signals [signum].gotsig = 0;
313		456
314	for (w = signals [sig].head; w; w = w->next)	457	for (w = signals [signum].head; w; w = w->next)
315	event ((W)w, EV_SIGNAL);	458	event (EV_A_ (W)w, EV_SIGNAL);
316	}	459	}
317	}	460	}
318		461
319	static void	462	static void
320	siginit (void)	463	siginit (EV_P)
321	{	464	{
		465	#ifndef WIN32
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324		468
325	/* rather than sort out wether we really need nb, set it */	469	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		472	#endif
328		473
329	evio_set (&sigev, sigpipe [0], EV_READ);	474	ev_io_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);	475	ev_io_start (EV_A_ &sigev);
		476	ev_unref (EV_A); /* child watcher should not keep loop alive */
331	}	477	}
332		478
333	/*****************************************************************************/	479	/*****************************************************************************/
334		480
335	static struct ev_idle **idles;	481	#ifndef WIN32
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345
346	static struct ev_child *childs [PID_HASHSIZE];
347	static struct ev_signal childev;
348		482
349	#ifndef WCONTINUED	483	#ifndef WCONTINUED
350	# define WCONTINUED 0	484	# define WCONTINUED 0
351	#endif	485	#endif
352		486
353	static void	487	static void
354	childcb (struct ev_signal *sw, int revents)	488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
355	{	489	{
356	struct ev_child *w;	490	struct ev_child *w;
		491
		492	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		493	if (w->pid == pid \|\| !w->pid)
		494	{
		495	w->priority = sw->priority; /* need to do it now */
		496	w->rpid = pid;
		497	w->rstatus = status;
		498	event (EV_A_ (W)w, EV_CHILD);
		499	}
		500	}
		501
		502	static void
		503	childcb (EV_P_ struct ev_signal *sw, int revents)
		504	{
357	int pid, status;	505	int pid, status;
358		506
359	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	507	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	508	{
361	if (w->pid == pid \|\| w->pid == -1)	509	/* make sure we are called again until all childs have been reaped */
362	{	510	event (EV_A_ (W)sw, EV_SIGNAL);
363	w->status = status;	511
364	event ((W)w, EV_CHILD);	512	child_reap (EV_A_ sw, pid, pid, status);
365	}	513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		514	}
366	}	515	}
		516
		517	#endif
367		518
368	/*****************************************************************************/	519	/*****************************************************************************/
369		520
		521	#if EV_USE_KQUEUE
		522	# include "ev_kqueue.c"
		523	#endif
370	#if HAVE_EPOLL	524	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	525	# include "ev_epoll.c"
372	#endif	526	#endif
		527	#if EV_USEV_POLL
		528	# include "ev_poll.c"
		529	#endif
373	#if HAVE_SELECT	530	#if EV_USE_SELECT
374	# include "ev_select.c"	531	# include "ev_select.c"
375	#endif	532	#endif
376		533
377	int ev_init (int flags)	534	int
		535	ev_version_major (void)
378	{	536	{
		537	return EV_VERSION_MAJOR;
		538	}
		539
		540	int
		541	ev_version_minor (void)
		542	{
		543	return EV_VERSION_MINOR;
		544	}
		545
		546	/* return true if we are running with elevated privileges and should ignore env variables */
		547	static int
		548	enable_secure (void)
		549	{
		550	#ifdef WIN32
		551	return 0;
		552	#else
		553	return getuid () != geteuid ()
		554	\|\| getgid () != getegid ();
		555	#endif
		556	}
		557
		558	int
		559	ev_method (EV_P)
		560	{
		561	return method;
		562	}
		563
		564	static void
		565	loop_init (EV_P_ int methods)
		566	{
379	if (!ev_method)	567	if (!method)
380	{	568	{
381	#if HAVE_MONOTONIC	569	#if EV_USE_MONOTONIC
382	{	570	{
383	struct timespec ts;	571	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	573	have_monotonic = 1;
386	}	574	}
387	#endif	575	#endif
388		576
389	ev_now = ev_time ();	577	rt_now = ev_time ();
390	now = get_clock ();	578	mn_now = get_clock ();
		579	now_floor = mn_now;
391	diff = ev_now - now;	580	rtmn_diff = rt_now - mn_now;
392		581
		582	if (methods == EVMETHOD_AUTO)
		583	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		584	methods = atoi (getenv ("LIBEV_METHODS"));
		585	else
		586	methods = EVMETHOD_ANY;
		587
		588	method = 0;
		589	#if EV_USE_KQUEUE
		590	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		591	#endif
		592	#if EV_USE_EPOLL
		593	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		594	#endif
		595	#if EV_USEV_POLL
		596	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		597	#endif
		598	#if EV_USE_SELECT
		599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		600	#endif
		601	}
		602	}
		603
		604	void
		605	loop_destroy (EV_P)
		606	{
		607	#if EV_USE_KQUEUE
		608	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		609	#endif
		610	#if EV_USE_EPOLL
		611	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		612	#endif
		613	#if EV_USEV_POLL
		614	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		615	#endif
		616	#if EV_USE_SELECT
		617	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		618	#endif
		619
		620	method = 0;
		621	/TODO/
		622	}
		623
		624	void
		625	loop_fork (EV_P)
		626	{
		627	/TODO/
		628	#if EV_USE_EPOLL
		629	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		630	#endif
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		633	#endif
		634	}
		635
		636	#if EV_MULTIPLICITY
		637	struct ev_loop *
		638	ev_loop_new (int methods)
		639	{
		640	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		641
		642	loop_init (EV_A_ methods);
		643
		644	if (ev_methods (EV_A))
		645	return loop;
		646
		647	return 0;
		648	}
		649
		650	void
		651	ev_loop_destroy (EV_P)
		652	{
		653	loop_destroy (EV_A);
		654	free (loop);
		655	}
		656
		657	void
		658	ev_loop_fork (EV_P)
		659	{
		660	loop_fork (EV_A);
		661	}
		662
		663	#endif
		664
		665	#if EV_MULTIPLICITY
		666	struct ev_loop default_loop_struct;
		667	static struct ev_loop *default_loop;
		668
		669	struct ev_loop *
		670	#else
		671	static int default_loop;
		672
		673	int
		674	#endif
		675	ev_default_loop (int methods)
		676	{
		677	if (sigpipe [0] == sigpipe [1])
393	if (pipe (sigpipe))	678	if (pipe (sigpipe))
394	return 0;	679	return 0;
395		680
396	ev_method = EVMETHOD_NONE;	681	if (!default_loop)
397	#if HAVE_EPOLL	682	{
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	683	#if EV_MULTIPLICITY
		684	struct ev_loop *loop = default_loop = &default_loop_struct;
		685	#else
		686	default_loop = 1;
399	#endif	687	#endif
400	#if HAVE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);
402	#endif
403		688
		689	loop_init (EV_A_ methods);
		690
404	if (ev_method)	691	if (ev_method (EV_A))
405	{	692	{
406	evw_init (&sigev, sigcb);	693	ev_watcher_init (&sigev, sigcb);
		694	ev_set_priority (&sigev, EV_MAXPRI);
407	siginit ();	695	siginit (EV_A);
408		696
		697	#ifndef WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	698	ev_signal_init (&childev, childcb, SIGCHLD);
		699	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	700	ev_signal_start (EV_A_ &childev);
		701	ev_unref (EV_A); /* child watcher should not keep loop alive */
		702	#endif
411	}	703	}
		704	else
		705	default_loop = 0;
412	}	706	}
413		707
414	return ev_method;	708	return default_loop;
415	}	709	}
416		710
417	/*****************************************************************************/	711	void
418		712	ev_default_destroy (void)
419	void ev_prefork (void)
420	{	713	{
421	/* nop */	714	#if EV_MULTIPLICITY
422	}	715	struct ev_loop *loop = default_loop;
423
424	void ev_postfork_parent (void)
425	{
426	/* nop */
427	}
428
429	void ev_postfork_child (void)
430	{
431	#if HAVE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();
434	#endif	716	#endif
435		717
		718	ev_ref (EV_A); /* child watcher */
		719	ev_signal_stop (EV_A_ &childev);
		720
		721	ev_ref (EV_A); /* signal watcher */
436	evio_stop (&sigev);	722	ev_io_stop (EV_A_ &sigev);
		723
		724	close (sigpipe [0]); sigpipe [0] = 0;
		725	close (sigpipe [1]); sigpipe [1] = 0;
		726
		727	loop_destroy (EV_A);
		728	}
		729
		730	void
		731	ev_default_fork (EV_P)
		732	{
		733	loop_fork (EV_A);
		734
		735	ev_io_stop (EV_A_ &sigev);
437	close (sigpipe [0]);	736	close (sigpipe [0]);
438	close (sigpipe [1]);	737	close (sigpipe [1]);
439	pipe (sigpipe);	738	pipe (sigpipe);
		739
		740	ev_ref (EV_A); /* signal watcher */
440	siginit ();	741	siginit (EV_A);
441	}	742	}
442		743
443	/*****************************************************************************/	744	/*****************************************************************************/
444		745
445	static void	746	static void
446	fd_reify (void)	747	call_pending (EV_P)
447	{	748	{
448	int i;	749	int pri;
449		750
450	for (i = 0; i < fdchangecnt; ++i)	751	for (pri = NUMPRI; pri--; )
451	{	752	while (pendingcnt [pri])
452	int fd = fdchanges [i];
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455
456	int wev = 0;
457
458	for (w = anfd->head; w; w = w->next)
459	wev \|= w->events;
460
461	if (anfd->wev != wev)
462	{	753	{
463	method_modify (fd, anfd->wev, wev);
464	anfd->wev = wev;
465	}
466	}
467
468	fdchangecnt = 0;
469	}
470
471	static void
472	call_pending ()
473	{
474	while (pendingcnt)
475	{
476	ANPENDING *p = pendings + --pendingcnt;	754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
477		755
478	if (p->w)	756	if (p->w)
479	{	757	{
480	p->w->pending = 0;	758	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	759	p->w->cb (EV_A_ p->w, p->events);
482	}	760	}
483	}	761	}
484	}	762	}
485		763
486	static void	764	static void
487	timers_reify ()	765	timers_reify (EV_P)
488	{	766	{
489	while (timercnt && timers [0]->at <= now)	767	while (timercnt && timers [0]->at <= mn_now)
490	{	768	{
491	struct ev_timer *w = timers [0];	769	struct ev_timer *w = timers [0];
492
493	event ((W)w, EV_TIMEOUT);
494		770
495	/* first reschedule or stop timer */	771	/* first reschedule or stop timer */
496	if (w->repeat)	772	if (w->repeat)
497	{	773	{
		774	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
498	w->at = now + w->repeat;	775	w->at = mn_now + w->repeat;
499	assert (("timer timeout in the past, negative repeat?", w->at > now));
500	downheap ((WT *)timers, timercnt, 0);	776	downheap ((WT *)timers, timercnt, 0);
501	}	777	}
502	else	778	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		780
		781	event (EV_A_ (W)w, EV_TIMEOUT);
		782	}
		783	}
		784
507	static void	785	static void
508	periodics_reify ()	786	periodics_reify (EV_P)
509	{	787	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	788	while (periodiccnt && periodics [0]->at <= rt_now)
511	{	789	{
512	struct ev_periodic *w = periodics [0];	790	struct ev_periodic *w = periodics [0];
513		791
514	/* first reschedule or stop timer */	792	/* first reschedule or stop timer */
515	if (w->interval)	793	if (w->interval)
516	{	794	{
517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	795	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	796	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
519	downheap ((WT *)periodics, periodiccnt, 0);	797	downheap ((WT *)periodics, periodiccnt, 0);
520	}	798	}
521	else	799	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		801
524	event ((W)w, EV_TIMEOUT);	802	event (EV_A_ (W)w, EV_PERIODIC);
525	}	803	}
526	}	804	}
527		805
528	static void	806	static void
529	periodics_reschedule (ev_tstamp diff)	807	periodics_reschedule (EV_P)
530	{	808	{
531	int i;	809	int i;
532		810
533	/* adjust periodics after time jump */	811	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	812	for (i = 0; i < periodiccnt; ++i)
535	{	813	{
536	struct ev_periodic *w = periodics [i];	814	struct ev_periodic *w = periodics [i];
537		815
538	if (w->interval)	816	if (w->interval)
539	{	817	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	818	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
541		819
542	if (fabs (diff) >= 1e-4)	820	if (fabs (diff) >= 1e-4)
543	{	821	{
544	evperiodic_stop (w);	822	ev_periodic_stop (EV_A_ w);
545	evperiodic_start (w);	823	ev_periodic_start (EV_A_ w);
546		824
547	i = 0; /* restart loop, inefficient, but time jumps should be rare */	825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
548	}	826	}
549	}	827	}
550	}	828	}
551	}	829	}
552		830
		831	inline int
		832	time_update_monotonic (EV_P)
		833	{
		834	mn_now = get_clock ();
		835
		836	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		837	{
		838	rt_now = rtmn_diff + mn_now;
		839	return 0;
		840	}
		841	else
		842	{
		843	now_floor = mn_now;
		844	rt_now = ev_time ();
		845	return 1;
		846	}
		847	}
		848
553	static void	849	static void
554	time_update ()	850	time_update (EV_P)
555	{	851	{
556	int i;	852	int i;
557		853
558	ev_now = ev_time ();	854	#if EV_USE_MONOTONIC
559
560	if (have_monotonic)	855	if (expect_true (have_monotonic))
561	{	856	{
562	ev_tstamp odiff = diff;	857	if (time_update_monotonic (EV_A))
563
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
565	{	858	{
566	now = get_clock ();	859	ev_tstamp odiff = rtmn_diff;
		860
		861	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		862	{
567	diff = ev_now - now;	863	rtmn_diff = rt_now - mn_now;
568		864
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)	865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
570	return; /* all is well */	866	return; /* all is well */
571		867
572	ev_now = ev_time ();	868	rt_now = ev_time ();
		869	mn_now = get_clock ();
		870	now_floor = mn_now;
		871	}
		872
		873	periodics_reschedule (EV_A);
		874	/* no timer adjustment, as the monotonic clock doesn't jump */
		875	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
573	}	876	}
574
575	periodics_reschedule (diff - odiff);
576	/* no timer adjustment, as the monotonic clock doesn't jump */
577	}	877	}
578	else	878	else
		879	#endif
579	{	880	{
580	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	881	rt_now = ev_time ();
		882
		883	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
581	{	884	{
582	periodics_reschedule (ev_now - now);	885	periodics_reschedule (EV_A);
583		886
584	/* adjust timers. this is easy, as the offset is the same for all */	887	/* adjust timers. this is easy, as the offset is the same for all */
585	for (i = 0; i < timercnt; ++i)	888	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	889	timers [i]->at += rt_now - mn_now;
587	}	890	}
588		891
589	now = ev_now;	892	mn_now = rt_now;
590	}	893	}
591	}	894	}
592		895
593	int ev_loop_done;	896	void
		897	ev_ref (EV_P)
		898	{
		899	++activecnt;
		900	}
594		901
		902	void
		903	ev_unref (EV_P)
		904	{
		905	--activecnt;
		906	}
		907
		908	static int loop_done;
		909
		910	void
595	void ev_loop (int flags)	911	ev_loop (EV_P_ int flags)
596	{	912	{
597	double block;	913	double block;
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	914	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
599		915
600	do	916	do
601	{	917	{
602	/* queue check watchers (and execute them) */	918	/* queue check watchers (and execute them) */
603	if (preparecnt)	919	if (expect_false (preparecnt))
604	{	920	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	922	call_pending (EV_A);
607	}	923	}
608		924
609	/* update fd-related kernel structures */	925	/* update fd-related kernel structures */
610	fd_reify ();	926	fd_reify (EV_A);
611		927
612	/* calculate blocking time */	928	/* calculate blocking time */
613		929
614	/* we only need this for !monotonic clockor timers, but as we basically	930	/* we only need this for !monotonic clockor timers, but as we basically
615	always have timers, we just calculate it always */	931	always have timers, we just calculate it always */
		932	#if EV_USE_MONOTONIC
		933	if (expect_true (have_monotonic))
		934	time_update_monotonic (EV_A);
		935	else
		936	#endif
		937	{
616	ev_now = ev_time ();	938	rt_now = ev_time ();
		939	mn_now = rt_now;
		940	}
617		941
618	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	942	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
619	block = 0.;	943	block = 0.;
620	else	944	else
621	{	945	{
622	block = MAX_BLOCKTIME;	946	block = MAX_BLOCKTIME;
623		947
624	if (timercnt)	948	if (timercnt)
625	{	949	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	950	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
627	if (block > to) block = to;	951	if (block > to) block = to;
628	}	952	}
629		953
630	if (periodiccnt)	954	if (periodiccnt)
631	{	955	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
633	if (block > to) block = to;	957	if (block > to) block = to;
634	}	958	}
635		959
636	if (block < 0.) block = 0.;	960	if (block < 0.) block = 0.;
637	}	961	}
638		962
639	method_poll (block);	963	method_poll (EV_A_ block);
640		964
641	/* update ev_now, do magic */	965	/* update rt_now, do magic */
642	time_update ();	966	time_update (EV_A);
643		967
644	/* queue pending timers and reschedule them */	968	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	969	timers_reify (EV_A); /* relative timers called last */
646	periodics_reify (); /* absolute timers called first */	970	periodics_reify (EV_A); /* absolute timers called first */
647		971
648	/* queue idle watchers unless io or timers are pending */	972	/* queue idle watchers unless io or timers are pending */
649	if (!pendingcnt)	973	if (!pendingcnt)
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
651		975
652	/* queue check watchers, to be executed first */	976	/* queue check watchers, to be executed first */
653	if (checkcnt)	977	if (checkcnt)
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		979
656	call_pending ();	980	call_pending (EV_A);
657	}	981	}
658	while (!ev_loop_done);	982	while (activecnt && !loop_done);
659		983
660	if (ev_loop_done != 2)	984	if (loop_done != 2)
661	ev_loop_done = 0;	985	loop_done = 0;
		986	}
		987
		988	void
		989	ev_unloop (EV_P_ int how)
		990	{
		991	loop_done = how;
662	}	992	}
663		993
664	/*****************************************************************************/	994	/*****************************************************************************/
665		995
666	static void	996	inline void
667	wlist_add (WL *head, WL elem)	997	wlist_add (WL *head, WL elem)
668	{	998	{
669	elem->next = *head;	999	elem->next = *head;
670	*head = elem;	1000	*head = elem;
671	}	1001	}
672		1002
673	static void	1003	inline void
674	wlist_del (WL *head, WL elem)	1004	wlist_del (WL *head, WL elem)
675	{	1005	{
676	while (*head)	1006	while (*head)
677	{	1007	{
678	if (*head == elem)	1008	if (*head == elem)
…		…
683		1013
684	head = &(*head)->next;	1014	head = &(*head)->next;
685	}	1015	}
686	}	1016	}
687		1017
688	static void	1018	inline void
689	ev_clear (W w)	1019	ev_clear_pending (EV_P_ W w)
690	{	1020	{
691	if (w->pending)	1021	if (w->pending)
692	{	1022	{
693	pendings [w->pending - 1].w = 0;	1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	1024	w->pending = 0;
695	}	1025	}
696	}	1026	}
697		1027
698	static void	1028	inline void
699	ev_start (W w, int active)	1029	ev_start (EV_P_ W w, int active)
700	{	1030	{
		1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1033
701	w->active = active;	1034	w->active = active;
		1035	ev_ref (EV_A);
702	}	1036	}
703		1037
704	static void	1038	inline void
705	ev_stop (W w)	1039	ev_stop (EV_P_ W w)
706	{	1040	{
		1041	ev_unref (EV_A);
707	w->active = 0;	1042	w->active = 0;
708	}	1043	}
709		1044
710	/*****************************************************************************/	1045	/*****************************************************************************/
711		1046
712	void	1047	void
713	evio_start (struct ev_io *w)	1048	ev_io_start (EV_P_ struct ev_io *w)
714	{	1049	{
		1050	int fd = w->fd;
		1051
715	if (ev_is_active (w))	1052	if (ev_is_active (w))
716	return;	1053	return;
717		1054
718	int fd = w->fd;	1055	assert (("ev_io_start called with negative fd", fd >= 0));
719		1056
720	ev_start ((W)w, 1);	1057	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		1060
724	++fdchangecnt;	1061	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	1062	}
728		1063
729	void	1064	void
730	evio_stop (struct ev_io *w)	1065	ev_io_stop (EV_P_ struct ev_io *w)
731	{	1066	{
732	ev_clear ((W)w);	1067	ev_clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	1068	if (!ev_is_active (w))
734	return;	1069	return;
735		1070
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	1072	ev_stop (EV_A_ (W)w);
738		1073
739	++fdchangecnt;	1074	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	1075	}
743		1076
744	void	1077	void
745	evtimer_start (struct ev_timer *w)	1078	ev_timer_start (EV_P_ struct ev_timer *w)
746	{	1079	{
747	if (ev_is_active (w))	1080	if (ev_is_active (w))
748	return;	1081	return;
749		1082
750	w->at += now;	1083	w->at += mn_now;
751		1084
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1085	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1086
754	ev_start ((W)w, ++timercnt);	1087	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1088	array_needsize (timers, timermax, timercnt, );
756	timers [timercnt - 1] = w;	1089	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1090	upheap ((WT *)timers, timercnt - 1);
758	}	1091	}
759		1092
760	void	1093	void
761	evtimer_stop (struct ev_timer *w)	1094	ev_timer_stop (EV_P_ struct ev_timer *w)
762	{	1095	{
763	ev_clear ((W)w);	1096	ev_clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1097	if (!ev_is_active (w))
765	return;	1098	return;
766		1099
767	if (w->active < timercnt--)	1100	if (w->active < timercnt--)
768	{	1101	{
…		…
770	downheap ((WT *)timers, timercnt, w->active - 1);	1103	downheap ((WT *)timers, timercnt, w->active - 1);
771	}	1104	}
772		1105
773	w->at = w->repeat;	1106	w->at = w->repeat;
774		1107
775	ev_stop ((W)w);	1108	ev_stop (EV_A_ (W)w);
776	}	1109	}
777		1110
778	void	1111	void
779	evtimer_again (struct ev_timer *w)	1112	ev_timer_again (EV_P_ struct ev_timer *w)
780	{	1113	{
781	if (ev_is_active (w))	1114	if (ev_is_active (w))
782	{	1115	{
783	if (w->repeat)	1116	if (w->repeat)
784	{	1117	{
785	w->at = now + w->repeat;	1118	w->at = mn_now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1119	downheap ((WT *)timers, timercnt, w->active - 1);
787	}	1120	}
788	else	1121	else
789	evtimer_stop (w);	1122	ev_timer_stop (EV_A_ w);
790	}	1123	}
791	else if (w->repeat)	1124	else if (w->repeat)
792	evtimer_start (w);	1125	ev_timer_start (EV_A_ w);
793	}	1126	}
794		1127
795	void	1128	void
796	evperiodic_start (struct ev_periodic *w)	1129	ev_periodic_start (EV_P_ struct ev_periodic *w)
797	{	1130	{
798	if (ev_is_active (w))	1131	if (ev_is_active (w))
799	return;	1132	return;
800		1133
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1134	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
802		1135
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1136	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)	1137	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
806		1139
807	ev_start ((W)w, ++periodiccnt);	1140	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1141	array_needsize (periodics, periodicmax, periodiccnt, );
809	periodics [periodiccnt - 1] = w;	1142	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1143	upheap ((WT *)periodics, periodiccnt - 1);
811	}	1144	}
812		1145
813	void	1146	void
814	evperiodic_stop (struct ev_periodic *w)	1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)
815	{	1148	{
816	ev_clear ((W)w);	1149	ev_clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1150	if (!ev_is_active (w))
818	return;	1151	return;
819		1152
820	if (w->active < periodiccnt--)	1153	if (w->active < periodiccnt--)
821	{	1154	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1155	periodics [w->active - 1] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);
824	}	1157	}
825		1158
826	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
827	}	1160	}
828		1161
829	void	1162	void
830	evsignal_start (struct ev_signal *w)	1163	ev_idle_start (EV_P_ struct ev_idle *w)
831	{	1164	{
832	if (ev_is_active (w))	1165	if (ev_is_active (w))
833	return;	1166	return;
834		1167
		1168	ev_start (EV_A_ (W)w, ++idlecnt);
		1169	array_needsize (idles, idlemax, idlecnt, );
		1170	idles [idlecnt - 1] = w;
		1171	}
		1172
		1173	void
		1174	ev_idle_stop (EV_P_ struct ev_idle *w)
		1175	{
		1176	ev_clear_pending (EV_A_ (W)w);
		1177	if (ev_is_active (w))
		1178	return;
		1179
		1180	idles [w->active - 1] = idles [--idlecnt];
		1181	ev_stop (EV_A_ (W)w);
		1182	}
		1183
		1184	void
		1185	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1186	{
		1187	if (ev_is_active (w))
		1188	return;
		1189
		1190	ev_start (EV_A_ (W)w, ++preparecnt);
		1191	array_needsize (prepares, preparemax, preparecnt, );
		1192	prepares [preparecnt - 1] = w;
		1193	}
		1194
		1195	void
		1196	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1197	{
		1198	ev_clear_pending (EV_A_ (W)w);
		1199	if (ev_is_active (w))
		1200	return;
		1201
		1202	prepares [w->active - 1] = prepares [--preparecnt];
		1203	ev_stop (EV_A_ (W)w);
		1204	}
		1205
		1206	void
		1207	ev_check_start (EV_P_ struct ev_check *w)
		1208	{
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	ev_start (EV_A_ (W)w, ++checkcnt);
		1213	array_needsize (checks, checkmax, checkcnt, );
		1214	checks [checkcnt - 1] = w;
		1215	}
		1216
		1217	void
		1218	ev_check_stop (EV_P_ struct ev_check *w)
		1219	{
		1220	ev_clear_pending (EV_A_ (W)w);
		1221	if (ev_is_active (w))
		1222	return;
		1223
		1224	checks [w->active - 1] = checks [--checkcnt];
		1225	ev_stop (EV_A_ (W)w);
		1226	}
		1227
		1228	#ifndef SA_RESTART
		1229	# define SA_RESTART 0
		1230	#endif
		1231
		1232	void
		1233	ev_signal_start (EV_P_ struct ev_signal *w)
		1234	{
		1235	#if EV_MULTIPLICITY
		1236	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1237	#endif
		1238	if (ev_is_active (w))
		1239	return;
		1240
		1241	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1242
835	ev_start ((W)w, 1);	1243	ev_start (EV_A_ (W)w, 1);
836	array_needsize (signals, signalmax, w->signum, signals_init);	1244	array_needsize (signals, signalmax, w->signum, signals_init);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1246
839	if (!w->next)	1247	if (!w->next)
840	{	1248	{
841	struct sigaction sa;	1249	struct sigaction sa;
842	sa.sa_handler = sighandler;	1250	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1251	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1253	sigaction (w->signum, &sa, 0);
846	}	1254	}
847	}	1255	}
848		1256
849	void	1257	void
850	evsignal_stop (struct ev_signal *w)	1258	ev_signal_stop (EV_P_ struct ev_signal *w)
851	{	1259	{
852	ev_clear ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
854	return;	1262	return;
855		1263
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1265	ev_stop (EV_A_ (W)w);
858		1266
859	if (!signals [w->signum - 1].head)	1267	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1268	signal (w->signum, SIG_DFL);
861	}	1269	}
862		1270
863	void evidle_start (struct ev_idle *w)	1271	void
		1272	ev_child_start (EV_P_ struct ev_child *w)
864	{	1273	{
		1274	#if EV_MULTIPLICITY
		1275	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1276	#endif
865	if (ev_is_active (w))	1277	if (ev_is_active (w))
866	return;	1278	return;
867		1279
868	ev_start ((W)w, ++idlecnt);	1280	ev_start (EV_A_ (W)w, 1);
869	array_needsize (idles, idlemax, idlecnt, );	1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
870	idles [idlecnt - 1] = w;
871	}	1282	}
872		1283
873	void evidle_stop (struct ev_idle *w)	1284	void
		1285	ev_child_stop (EV_P_ struct ev_child *w)
874	{	1286	{
875	ev_clear ((W)w);	1287	ev_clear_pending (EV_A_ (W)w);
876	if (ev_is_active (w))	1288	if (ev_is_active (w))
877	return;	1289	return;
878		1290
879	idles [w->active - 1] = idles [--idlecnt];
880	ev_stop ((W)w);
881	}
882
883	void evprepare_start (struct ev_prepare *w)
884	{
885	if (ev_is_active (w))
886	return;
887
888	ev_start ((W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );
890	prepares [preparecnt - 1] = w;
891	}
892
893	void evprepare_stop (struct ev_prepare *w)
894	{
895	ev_clear ((W)w);
896	if (ev_is_active (w))
897	return;
898
899	prepares [w->active - 1] = prepares [--preparecnt];
900	ev_stop ((W)w);
901	}
902
903	void evcheck_start (struct ev_check *w)
904	{
905	if (ev_is_active (w))
906	return;
907
908	ev_start ((W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );
910	checks [checkcnt - 1] = w;
911	}
912
913	void evcheck_stop (struct ev_check *w)
914	{
915	ev_clear ((W)w);
916	if (ev_is_active (w))
917	return;
918
919	checks [w->active - 1] = checks [--checkcnt];
920	ev_stop ((W)w);
921	}
922
923	void evchild_start (struct ev_child *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}
931
932	void evchild_stop (struct ev_child *w)
933	{
934	ev_clear ((W)w);
935	if (ev_is_active (w))
936	return;
937
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
939	ev_stop ((W)w);	1292	ev_stop (EV_A_ (W)w);
940	}	1293	}
941		1294
942	/*****************************************************************************/	1295	/*****************************************************************************/
943		1296
944	struct ev_once	1297	struct ev_once
…		…
948	void (cb)(int revents, void arg);	1301	void (cb)(int revents, void arg);
949	void *arg;	1302	void *arg;
950	};	1303	};
951		1304
952	static void	1305	static void
953	once_cb (struct ev_once *once, int revents)	1306	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	1307	{
955	void (cb)(int revents, void arg) = once->cb;	1308	void (cb)(int revents, void arg) = once->cb;
956	void *arg = once->arg;	1309	void *arg = once->arg;
957		1310
958	evio_stop (&once->io);	1311	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	1312	ev_timer_stop (EV_A_ &once->to);
960	free (once);	1313	free (once);
961		1314
962	cb (revents, arg);	1315	cb (revents, arg);
963	}	1316	}
964		1317
965	static void	1318	static void
966	once_cb_io (struct ev_io *w, int revents)	1319	once_cb_io (EV_P_ struct ev_io *w, int revents)
967	{	1320	{
968	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1321	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
969	}	1322	}
970		1323
971	static void	1324	static void
972	once_cb_to (struct ev_timer *w, int revents)	1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)
973	{	1326	{
974	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1327	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
975	}	1328	}
976		1329
977	void	1330	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1331	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
979	{	1332	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	1333	struct ev_once *once = malloc (sizeof (struct ev_once));
981		1334
982	if (!once)	1335	if (!once)
983	cb (EV_ERROR, arg);	1336	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
984	else	1337	else
985	{	1338	{
986	once->cb = cb;	1339	once->cb = cb;
987	once->arg = arg;	1340	once->arg = arg;
988		1341
989	evw_init (&once->io, once_cb_io);	1342	ev_watcher_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	1343	if (fd >= 0)
992	{	1344	{
993	evio_set (&once->io, fd, events);	1345	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	1346	ev_io_start (EV_A_ &once->io);
995	}	1347	}
996		1348
997	evw_init (&once->to, once_cb_to);	1349	ev_watcher_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	1350	if (timeout >= 0.)
1000	{	1351	{
1001	evtimer_set (&once->to, timeout, 0.);	1352	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	1353	ev_timer_start (EV_A_ &once->to);
1003	}	1354	}
1004	}	1355	}
1005	}	1356	}
1006		1357
1007	/*****************************************************************************/
1008
1009	#if 0
1010
1011	struct ev_io wio;
1012
1013	static void
1014	sin_cb (struct ev_io *w, int revents)
1015	{
1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1017	}
1018
1019	static void
1020	ocb (struct ev_timer *w, int revents)
1021	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);
1024	evtimer_start (w);
1025	}
1026
1027	static void
1028	scb (struct ev_signal *w, int revents)
1029	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);
1032	evio_start (&wio);
1033	}
1034
1035	static void
1036	gcb (struct ev_signal *w, int revents)
1037	{
1038	fprintf (stderr, "generic %x\n", revents);
1039
1040	}
1041
1042	int main (void)
1043	{
1044	ev_init (0);
1045
1046	evio_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);
1048
1049	struct ev_timer t[10000];
1050
1051	#if 0
1052	int i;
1053	for (i = 0; i < 10000; ++i)
1054	{
1055	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);
1059	if (drand48 () < 0.5)
1060	evtimer_stop (w);
1061	}
1062	#endif
1063
1064	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);
1067
1068	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);
1071
1072	struct ev_check cw;
1073	evcheck_init (&cw, gcb);
1074	evcheck_start (&cw);
1075
1076	struct ev_idle iw;
1077	evidle_init (&iw, gcb);
1078	evidle_start (&iw);
1079
1080	ev_loop (0);
1081
1082	return 0;
1083	}
1084
1085	#endif
1086
1087
1088
1089

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Comparing libev/ev.c (file contents): Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs. Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC