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

Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 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	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_EMBED
30	# include "config.h"	32	# include "config.h"
31	#endif	33	#endif
32		34
33	#include <math.h>	35	#include <math.h>
34	#include <stdlib.h>	36	#include <stdlib.h>
…		…
40	#include <stdio.h>	42	#include <stdio.h>
41		43
42	#include <assert.h>	44	#include <assert.h>
43	#include <errno.h>	45	#include <errno.h>
44	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
45	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
46	#include <sys/time.h>	50	#include <sys/time.h>
47	#include <time.h>	51	#include <time.h>
48		52
		53	/**/
		54
49	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	57	#endif
54		58
55	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
57	#endif	61	#endif
58		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
59	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
61	#endif	69	#endif
62		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
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
63	#ifndef CLOCK_REALTIME	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	88	# define EV_USE_REALTIME 0
65	#endif	89	#endif
66	#ifndef EV_USE_REALTIME	90
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	91	/**/
68	#endif
69		92
70	#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) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
74		97
		98	#ifndef EV_EMBED
75	#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)
76		115
77	typedef struct ev_watcher *W;	116	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	117	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	118	typedef struct ev_watcher_time *WT;
80		119
81	static ev_tstamp now, diff; /* monotonic clock */	120	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84
85	static int have_monotonic; /* runtime */
86
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		121
91	/*****************************************************************************/	122	/*****************************************************************************/
92		123
93	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
94	ev_time (void)	158	ev_time (void)
95	{	159	{
96	#if EV_USE_REALTIME	160	#if EV_USE_REALTIME
97	struct timespec ts;	161	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	162	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	166	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	167	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	168	#endif
105	}	169	}
106		170
107	static ev_tstamp	171	inline ev_tstamp
108	get_clock (void)	172	get_clock (void)
109	{	173	{
110	#if EV_USE_MONOTONIC	174	#if EV_USE_MONOTONIC
111	if (have_monotonic)	175	if (expect_true (have_monotonic))
112	{	176	{
113	struct timespec ts;	177	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	178	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	179	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	180	}
117	#endif	181	#endif
118		182
119	return ev_time ();	183	return ev_time ();
120	}	184	}
121		185
		186	ev_tstamp
		187	ev_now (EV_P)
		188	{
		189	return rt_now;
		190	}
		191
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	192	#define array_roundsize(base,n) ((n) \| 4 & ~3)
123		193
124	#define array_needsize(base,cur,cnt,init) \	194	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	195	if (expect_false ((cnt) > cur)) \
126	{ \	196	{ \
127	int newcnt = cur; \	197	int newcnt = cur; \
128	do \	198	do \
129	{ \	199	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	200	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	206	cur = newcnt; \
137	}	207	}
138		208
139	/*****************************************************************************/	209	/*****************************************************************************/
140		210
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150
151	static void	211	static void
152	anfds_init (ANFD *base, int count)	212	anfds_init (ANFD *base, int count)
153	{	213	{
154	while (count--)	214	while (count--)
155	{	215	{
…		…
159		219
160	++base;	220	++base;
161	}	221	}
162	}	222	}
163		223
164	typedef struct
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void	224	static void
174	event (W w, int events)	225	event (EV_P_ W w, int events)
175	{	226	{
176	if (w->pending)	227	if (w->pending)
177	{	228	{
178	pendings [w->pending - 1].events \|= events;	229	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
179	return;	230	return;
180	}	231	}
181		232
182	w->pending = ++pendingcnt;	233	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
184	pendings [pendingcnt - 1].w = w;	235	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	236	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	237	}
187		238
188	static void	239	static void
189	queue_events (W *events, int eventcnt, int type)	240	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	241	{
191	int i;	242	int i;
192		243
193	for (i = 0; i < eventcnt; ++i)	244	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	245	event (EV_A_ events [i], type);
195	}	246	}
196		247
197	static void	248	static void
198	fd_event (int fd, int events)	249	fd_event (EV_P_ int fd, int events)
199	{	250	{
200	ANFD *anfd = anfds + fd;	251	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	252	struct ev_io *w;
202		253
203	for (w = anfd->head; w; w = w->next)	254	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
204	{	255	{
205	int ev = w->events & events;	256	int ev = w->events & events;
206		257
207	if (ev)	258	if (ev)
208	event ((W)w, ev);	259	event (EV_A_ (W)w, ev);
209	}	260	}
210	}	261	}
211		262
212	/*****************************************************************************/	263	/*****************************************************************************/
213		264
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	265	static void
218	fd_reify (void)	266	fd_reify (EV_P)
219	{	267	{
220	int i;	268	int i;
221		269
222	for (i = 0; i < fdchangecnt; ++i)	270	for (i = 0; i < fdchangecnt; ++i)
223	{	271	{
…		…
225	ANFD *anfd = anfds + fd;	273	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	274	struct ev_io *w;
227		275
228	int events = 0;	276	int events = 0;
229		277
230	for (w = anfd->head; w; w = w->next)	278	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
231	events \|= w->events;	279	events \|= w->events;
232		280
233	anfd->reify = 0;	281	anfd->reify = 0;
234		282
235	if (anfd->events != events)	283	if (anfd->events != events)
236	{	284	{
237	method_modify (fd, anfd->events, events);	285	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	286	anfd->events = events;
239	}	287	}
240	}	288	}
241		289
242	fdchangecnt = 0;	290	fdchangecnt = 0;
243	}	291	}
244		292
245	static void	293	static void
246	fd_change (int fd)	294	fd_change (EV_P_ int fd)
247	{	295	{
248	if (anfds [fd].reify \|\| fdchangecnt < 0)	296	if (anfds [fd].reify \|\| fdchangecnt < 0)
249	return;	297	return;
250		298
251	anfds [fd].reify = 1;	299	anfds [fd].reify = 1;
…		…
253	++fdchangecnt;	301	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
255	fdchanges [fdchangecnt - 1] = fd;	303	fdchanges [fdchangecnt - 1] = fd;
256	}	304	}
257		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	}
		316	}
		317
258	/* called on EBADF to verify fds */	318	/* called on EBADF to verify fds */
259	static void	319	static void
260	fd_recheck (void)	320	fd_ebadf (EV_P)
261	{	321	{
262	int fd;	322	int fd;
263		323
264	for (fd = 0; fd < anfdmax; ++fd)	324	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	325	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
267	while (anfds [fd].head)	327	fd_kill (EV_A_ fd);
		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)
268	{	338	{
269	ev_io_stop (anfds [fd].head);	339	close (fd);
270	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	340	fd_kill (EV_A_ fd);
		341	return;
271	}	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	}
272	}	358	}
273		359
274	/*****************************************************************************/	360	/*****************************************************************************/
275		361
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	362	static void
283	upheap (WT *timers, int k)	363	upheap (WT *heap, int k)
284	{	364	{
285	WT w = timers [k];	365	WT w = heap [k];
286		366
287	while (k && timers [k >> 1]->at > w->at)	367	while (k && heap [k >> 1]->at > w->at)
288	{	368	{
289	timers [k] = timers [k >> 1];	369	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	370	heap [k]->active = k + 1;
291	k >>= 1;	371	k >>= 1;
292	}	372	}
293		373
294	timers [k] = w;	374	heap [k] = w;
295	timers [k]->active = k + 1;	375	heap [k]->active = k + 1;
296		376
297	}	377	}
298		378
299	static void	379	static void
300	downheap (WT *timers, int N, int k)	380	downheap (WT *heap, int N, int k)
301	{	381	{
302	WT w = timers [k];	382	WT w = heap [k];
303		383
304	while (k < (N >> 1))	384	while (k < (N >> 1))
305	{	385	{
306	int j = k << 1;	386	int j = k << 1;
307		387
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	389	++j;
310		390
311	if (w->at <= timers [j]->at)	391	if (w->at <= heap [j]->at)
312	break;	392	break;
313		393
314	timers [k] = timers [j];	394	heap [k] = heap [j];
315	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
316	k = j;	396	k = j;
317	}	397	}
318		398
319	timers [k] = w;	399	heap [k] = w;
320	timers [k]->active = k + 1;	400	heap [k]->active = k + 1;
321	}	401	}
322		402
323	/*****************************************************************************/	403	/*****************************************************************************/
324		404
325	typedef struct	405	typedef struct
326	{	406	{
327	struct ev_signal *head;	407	struct ev_watcher_list *head;
328	sig_atomic_t volatile gotsig;	408	sig_atomic_t volatile gotsig;
329	} ANSIG;	409	} ANSIG;
330		410
331	static ANSIG *signals;	411	static ANSIG *signals;
332	static int signalmax;	412	static int signalmax;
333		413
334	static int sigpipe [2];	414	static int sigpipe [2];
335	static sig_atomic_t volatile gotsig;	415	static sig_atomic_t volatile gotsig;
336	static struct ev_io sigev;
337		416
338	static void	417	static void
339	signals_init (ANSIG *base, int count)	418	signals_init (ANSIG *base, int count)
340	{	419	{
341	while (count--)	420	while (count--)
…		…
352	{	431	{
353	signals [signum - 1].gotsig = 1;	432	signals [signum - 1].gotsig = 1;
354		433
355	if (!gotsig)	434	if (!gotsig)
356	{	435	{
		436	int old_errno = errno;
357	gotsig = 1;	437	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	438	write (sigpipe [1], &signum, 1);
		439	errno = old_errno;
359	}	440	}
360	}	441	}
361		442
362	static void	443	static void
363	sigcb (struct ev_io *iow, int revents)	444	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	445	{
365	struct ev_signal *w;	446	struct ev_watcher_list *w;
366	int sig;	447	int signum;
367		448
368	read (sigpipe [0], &revents, 1);	449	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	450	gotsig = 0;
370		451
371	for (sig = signalmax; sig--; )	452	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	453	if (signals [signum].gotsig)
373	{	454	{
374	signals [sig].gotsig = 0;	455	signals [signum].gotsig = 0;
375		456
376	for (w = signals [sig].head; w; w = w->next)	457	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	458	event (EV_A_ (W)w, EV_SIGNAL);
378	}	459	}
379	}	460	}
380		461
381	static void	462	static void
382	siginit (void)	463	siginit (EV_P)
383	{	464	{
		465	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		468
387	/* rather than sort out wether we really need nb, set it */	469	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		472	#endif
390		473
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	474	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	475	ev_io_start (EV_A_ &sigev);
		476	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	477	}
394		478
395	/*****************************************************************************/	479	/*****************************************************************************/
396		480
397	static struct ev_idle **idles;	481	#ifndef WIN32
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;
410		482
411	#ifndef WCONTINUED	483	#ifndef WCONTINUED
412	# define WCONTINUED 0	484	# define WCONTINUED 0
413	#endif	485	#endif
414		486
415	static void	487	static void
416	childcb (struct ev_signal *sw, int revents)	488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	489	{
418	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	{
419	int pid, status;	505	int pid, status;
420		506
421	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	507	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	508	{
423	if (w->pid == pid \|\| w->pid == -1)	509	/* make sure we are called again until all childs have been reaped */
424	{	510	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	511
426	event ((W)w, EV_CHILD);	512	child_reap (EV_A_ sw, pid, pid, status);
427	}	513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		514	}
428	}	515	}
		516
		517	#endif
429		518
430	/*****************************************************************************/	519	/*****************************************************************************/
431		520
		521	#if EV_USE_KQUEUE
		522	# include "ev_kqueue.c"
		523	#endif
432	#if EV_USE_EPOLL	524	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	525	# include "ev_epoll.c"
434	#endif	526	#endif
		527	#if EV_USEV_POLL
		528	# include "ev_poll.c"
		529	#endif
435	#if EV_USE_SELECT	530	#if EV_USE_SELECT
436	# include "ev_select.c"	531	# include "ev_select.c"
437	#endif	532	#endif
438		533
439	int	534	int
…		…
446	ev_version_minor (void)	541	ev_version_minor (void)
447	{	542	{
448	return EV_VERSION_MINOR;	543	return EV_VERSION_MINOR;
449	}	544	}
450		545
451	int ev_init (int flags)	546	/* return true if we are running with elevated privileges and should ignore env variables */
		547	static int
		548	enable_secure (void)
452	{	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	{
453	if (!ev_method)	567	if (!method)
454	{	568	{
455	#if EV_USE_MONOTONIC	569	#if EV_USE_MONOTONIC
456	{	570	{
457	struct timespec ts;	571	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	573	have_monotonic = 1;
460	}	574	}
461	#endif	575	#endif
462		576
463	ev_now = ev_time ();	577	rt_now = ev_time ();
464	now = get_clock ();	578	mn_now = get_clock ();
		579	now_floor = mn_now;
465	diff = ev_now - now;	580	rtmn_diff = rt_now - mn_now;
466		581
467	if (pipe (sigpipe))	582	if (methods == EVMETHOD_AUTO)
468	return 0;	583	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		584	methods = atoi (getenv ("LIBEV_METHODS"));
		585	else
470	ev_method = EVMETHOD_NONE;	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
471	#if EV_USE_EPOLL	592	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	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);
473	#endif	597	#endif
474	#if EV_USE_SELECT	598	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	600	#endif
		601	}
		602	}
477		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])
		678	if (pipe (sigpipe))
		679	return 0;
		680
		681	if (!default_loop)
		682	{
		683	#if EV_MULTIPLICITY
		684	struct ev_loop *loop = default_loop = &default_loop_struct;
		685	#else
		686	default_loop = 1;
		687	#endif
		688
		689	loop_init (EV_A_ methods);
		690
478	if (ev_method)	691	if (ev_method (EV_A))
479	{	692	{
480	ev_watcher_init (&sigev, sigcb);	693	ev_watcher_init (&sigev, sigcb);
		694	ev_set_priority (&sigev, EV_MAXPRI);
481	siginit ();	695	siginit (EV_A);
482		696
		697	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	698	ev_signal_init (&childev, childcb, SIGCHLD);
		699	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	700	ev_signal_start (EV_A_ &childev);
		701	ev_unref (EV_A); /* child watcher should not keep loop alive */
		702	#endif
485	}	703	}
		704	else
		705	default_loop = 0;
486	}	706	}
487		707
488	return ev_method;	708	return default_loop;
489	}	709	}
490		710
491	/*****************************************************************************/
492
493	void	711	void
494	ev_fork_prepare (void)	712	ev_default_destroy (void)
495	{	713	{
496	/* nop */	714	#if EV_MULTIPLICITY
497	}	715	struct ev_loop *loop = default_loop;
498
499	void
500	ev_fork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_fork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif	716	#endif
512		717
		718	ev_ref (EV_A); /* child watcher */
		719	ev_signal_stop (EV_A_ &childev);
		720
		721	ev_ref (EV_A); /* signal watcher */
513	ev_io_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);
514	close (sigpipe [0]);	736	close (sigpipe [0]);
515	close (sigpipe [1]);	737	close (sigpipe [1]);
516	pipe (sigpipe);	738	pipe (sigpipe);
		739
		740	ev_ref (EV_A); /* signal watcher */
517	siginit ();	741	siginit (EV_A);
518	}	742	}
519		743
520	/*****************************************************************************/	744	/*****************************************************************************/
521		745
522	static void	746	static void
523	call_pending (void)	747	call_pending (EV_P)
524	{	748	{
		749	int pri;
		750
		751	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	752	while (pendingcnt [pri])
526	{	753	{
527	ANPENDING *p = pendings + --pendingcnt;	754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		755
529	if (p->w)	756	if (p->w)
530	{	757	{
531	p->w->pending = 0;	758	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	759	p->w->cb (EV_A_ p->w, p->events);
533	}	760	}
534	}	761	}
535	}	762	}
536		763
537	static void	764	static void
538	timers_reify (void)	765	timers_reify (EV_P)
539	{	766	{
540	while (timercnt && timers [0]->at <= now)	767	while (timercnt && timers [0]->at <= mn_now)
541	{	768	{
542	struct ev_timer *w = timers [0];	769	struct ev_timer *w = timers [0];
543		770
544	/* first reschedule or stop timer */	771	/* first reschedule or stop timer */
545	if (w->repeat)	772	if (w->repeat)
546	{	773	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	774	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	775	w->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	776	downheap ((WT *)timers, timercnt, 0);
550	}	777	}
551	else	778	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		780
554	event ((W)w, EV_TIMEOUT);	781	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	782	}
556	}	783	}
557		784
558	static void	785	static void
559	periodics_reify (void)	786	periodics_reify (EV_P)
560	{	787	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	788	while (periodiccnt && periodics [0]->at <= rt_now)
562	{	789	{
563	struct ev_periodic *w = periodics [0];	790	struct ev_periodic *w = periodics [0];
564		791
565	/* first reschedule or stop timer */	792	/* first reschedule or stop timer */
566	if (w->interval)	793	if (w->interval)
567	{	794	{
568	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;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	796	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	797	downheap ((WT *)periodics, periodiccnt, 0);
571	}	798	}
572	else	799	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		801
575	event ((W)w, EV_PERIODIC);	802	event (EV_A_ (W)w, EV_PERIODIC);
576	}	803	}
577	}	804	}
578		805
579	static void	806	static void
580	periodics_reschedule (ev_tstamp diff)	807	periodics_reschedule (EV_P)
581	{	808	{
582	int i;	809	int i;
583		810
584	/* adjust periodics after time jump */	811	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	812	for (i = 0; i < periodiccnt; ++i)
586	{	813	{
587	struct ev_periodic *w = periodics [i];	814	struct ev_periodic *w = periodics [i];
588		815
589	if (w->interval)	816	if (w->interval)
590	{	817	{
591	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;
592		819
593	if (fabs (diff) >= 1e-4)	820	if (fabs (diff) >= 1e-4)
594	{	821	{
595	ev_periodic_stop (w);	822	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	823	ev_periodic_start (EV_A_ w);
597		824
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	826	}
600	}	827	}
601	}	828	}
602	}	829	}
603		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
604	static void	849	static void
605	time_update (void)	850	time_update (EV_P)
606	{	851	{
607	int i;	852	int i;
608		853
609	ev_now = ev_time ();	854	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	855	if (expect_true (have_monotonic))
612	{	856	{
613	ev_tstamp odiff = diff;	857	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	858	{
617	now = get_clock ();	859	ev_tstamp odiff = rtmn_diff;
		860
		861	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		862	{
618	diff = ev_now - now;	863	rtmn_diff = rt_now - mn_now;
619		864
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	866	return; /* all is well */
622		867
623	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) */
624	}	876	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	877	}
629	else	878	else
		879	#endif
630	{	880	{
631	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))
632	{	884	{
633	periodics_reschedule (ev_now - now);	885	periodics_reschedule (EV_A);
634		886
635	/* 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 */
636	for (i = 0; i < timercnt; ++i)	888	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	889	timers [i]->at += rt_now - mn_now;
638	}	890	}
639		891
640	now = ev_now;	892	mn_now = rt_now;
641	}	893	}
642	}	894	}
643		895
644	int ev_loop_done;	896	void
		897	ev_ref (EV_P)
		898	{
		899	++activecnt;
		900	}
645		901
		902	void
		903	ev_unref (EV_P)
		904	{
		905	--activecnt;
		906	}
		907
		908	static int loop_done;
		909
		910	void
646	void ev_loop (int flags)	911	ev_loop (EV_P_ int flags)
647	{	912	{
648	double block;	913	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	914	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
650		915
651	do	916	do
652	{	917	{
653	/* queue check watchers (and execute them) */	918	/* queue check watchers (and execute them) */
654	if (preparecnt)	919	if (expect_false (preparecnt))
655	{	920	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	922	call_pending (EV_A);
658	}	923	}
659		924
660	/* update fd-related kernel structures */	925	/* update fd-related kernel structures */
661	fd_reify ();	926	fd_reify (EV_A);
662		927
663	/* calculate blocking time */	928	/* calculate blocking time */
664		929
665	/* 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
666	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	{
667	ev_now = ev_time ();	938	rt_now = ev_time ();
		939	mn_now = rt_now;
		940	}
668		941
669	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	942	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
670	block = 0.;	943	block = 0.;
671	else	944	else
672	{	945	{
673	block = MAX_BLOCKTIME;	946	block = MAX_BLOCKTIME;
674		947
675	if (timercnt)	948	if (timercnt)
676	{	949	{
677	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;
678	if (block > to) block = to;	951	if (block > to) block = to;
679	}	952	}
680		953
681	if (periodiccnt)	954	if (periodiccnt)
682	{	955	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
684	if (block > to) block = to;	957	if (block > to) block = to;
685	}	958	}
686		959
687	if (block < 0.) block = 0.;	960	if (block < 0.) block = 0.;
688	}	961	}
689		962
690	method_poll (block);	963	method_poll (EV_A_ block);
691		964
692	/* update ev_now, do magic */	965	/* update rt_now, do magic */
693	time_update ();	966	time_update (EV_A);
694		967
695	/* queue pending timers and reschedule them */	968	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	969	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	970	periodics_reify (EV_A); /* absolute timers called first */
698		971
699	/* queue idle watchers unless io or timers are pending */	972	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	973	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		975
703	/* queue check watchers, to be executed first */	976	/* queue check watchers, to be executed first */
704	if (checkcnt)	977	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		979
707	call_pending ();	980	call_pending (EV_A);
708	}	981	}
709	while (!ev_loop_done);	982	while (activecnt && !loop_done);
710		983
711	if (ev_loop_done != 2)	984	if (loop_done != 2)
712	ev_loop_done = 0;	985	loop_done = 0;
		986	}
		987
		988	void
		989	ev_unloop (EV_P_ int how)
		990	{
		991	loop_done = how;
713	}	992	}
714		993
715	/*****************************************************************************/	994	/*****************************************************************************/
716		995
717	static void	996	inline void
718	wlist_add (WL *head, WL elem)	997	wlist_add (WL *head, WL elem)
719	{	998	{
720	elem->next = *head;	999	elem->next = *head;
721	*head = elem;	1000	*head = elem;
722	}	1001	}
723		1002
724	static void	1003	inline void
725	wlist_del (WL *head, WL elem)	1004	wlist_del (WL *head, WL elem)
726	{	1005	{
727	while (*head)	1006	while (*head)
728	{	1007	{
729	if (*head == elem)	1008	if (*head == elem)
…		…
734		1013
735	head = &(*head)->next;	1014	head = &(*head)->next;
736	}	1015	}
737	}	1016	}
738		1017
739	static void	1018	inline void
740	ev_clear_pending (W w)	1019	ev_clear_pending (EV_P_ W w)
741	{	1020	{
742	if (w->pending)	1021	if (w->pending)
743	{	1022	{
744	pendings [w->pending - 1].w = 0;	1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1024	w->pending = 0;
746	}	1025	}
747	}	1026	}
748		1027
749	static void	1028	inline void
750	ev_start (W w, int active)	1029	ev_start (EV_P_ W w, int active)
751	{	1030	{
		1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1033
752	w->active = active;	1034	w->active = active;
		1035	ev_ref (EV_A);
753	}	1036	}
754		1037
755	static void	1038	inline void
756	ev_stop (W w)	1039	ev_stop (EV_P_ W w)
757	{	1040	{
		1041	ev_unref (EV_A);
758	w->active = 0;	1042	w->active = 0;
759	}	1043	}
760		1044
761	/*****************************************************************************/	1045	/*****************************************************************************/
762		1046
763	void	1047	void
764	ev_io_start (struct ev_io *w)	1048	ev_io_start (EV_P_ struct ev_io *w)
765	{	1049	{
		1050	int fd = w->fd;
		1051
766	if (ev_is_active (w))	1052	if (ev_is_active (w))
767	return;	1053	return;
768		1054
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1055	assert (("ev_io_start called with negative fd", fd >= 0));
772		1056
773	ev_start ((W)w, 1);	1057	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1060
777	fd_change (fd);	1061	fd_change (EV_A_ fd);
778	}	1062	}
779		1063
780	void	1064	void
781	ev_io_stop (struct ev_io *w)	1065	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1066	{
783	ev_clear_pending ((W)w);	1067	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1068	if (!ev_is_active (w))
785	return;	1069	return;
786		1070
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1072	ev_stop (EV_A_ (W)w);
789		1073
790	fd_change (w->fd);	1074	fd_change (EV_A_ w->fd);
791	}	1075	}
792		1076
793	void	1077	void
794	ev_timer_start (struct ev_timer *w)	1078	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1079	{
796	if (ev_is_active (w))	1080	if (ev_is_active (w))
797	return;	1081	return;
798		1082
799	w->at += now;	1083	w->at += mn_now;
800		1084
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1085	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1086
803	ev_start ((W)w, ++timercnt);	1087	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1088	array_needsize (timers, timermax, timercnt, );
805	timers [timercnt - 1] = w;	1089	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1090	upheap ((WT *)timers, timercnt - 1);
807	}	1091	}
808		1092
809	void	1093	void
810	ev_timer_stop (struct ev_timer *w)	1094	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1095	{
812	ev_clear_pending ((W)w);	1096	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1097	if (!ev_is_active (w))
814	return;	1098	return;
815		1099
816	if (w->active < timercnt--)	1100	if (w->active < timercnt--)
817	{	1101	{
…		…
819	downheap ((WT *)timers, timercnt, w->active - 1);	1103	downheap ((WT *)timers, timercnt, w->active - 1);
820	}	1104	}
821		1105
822	w->at = w->repeat;	1106	w->at = w->repeat;
823		1107
824	ev_stop ((W)w);	1108	ev_stop (EV_A_ (W)w);
825	}	1109	}
826		1110
827	void	1111	void
828	ev_timer_again (struct ev_timer *w)	1112	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1113	{
830	if (ev_is_active (w))	1114	if (ev_is_active (w))
831	{	1115	{
832	if (w->repeat)	1116	if (w->repeat)
833	{	1117	{
834	w->at = now + w->repeat;	1118	w->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1119	downheap ((WT *)timers, timercnt, w->active - 1);
836	}	1120	}
837	else	1121	else
838	ev_timer_stop (w);	1122	ev_timer_stop (EV_A_ w);
839	}	1123	}
840	else if (w->repeat)	1124	else if (w->repeat)
841	ev_timer_start (w);	1125	ev_timer_start (EV_A_ w);
842	}	1126	}
843		1127
844	void	1128	void
845	ev_periodic_start (struct ev_periodic *w)	1129	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1130	{
847	if (ev_is_active (w))	1131	if (ev_is_active (w))
848	return;	1132	return;
849		1133
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1134	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1135
852	/* 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 */
853	if (w->interval)	1137	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
855		1139
856	ev_start ((W)w, ++periodiccnt);	1140	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1141	array_needsize (periodics, periodicmax, periodiccnt, );
858	periodics [periodiccnt - 1] = w;	1142	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1143	upheap ((WT *)periodics, periodiccnt - 1);
860	}	1144	}
861		1145
862	void	1146	void
863	ev_periodic_stop (struct ev_periodic *w)	1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1148	{
865	ev_clear_pending ((W)w);	1149	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1150	if (!ev_is_active (w))
867	return;	1151	return;
868		1152
869	if (w->active < periodiccnt--)	1153	if (w->active < periodiccnt--)
870	{	1154	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1155	periodics [w->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);
873	}	1157	}
874		1158
875	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
876	}	1160	}
877		1161
878	void	1162	void
879	ev_signal_start (struct ev_signal *w)	1163	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1164	{
881	if (ev_is_active (w))	1165	if (ev_is_active (w))
882	return;	1166	return;
883		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
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1241	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1242
886	ev_start ((W)w, 1);	1243	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1244	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1246
890	if (!w->next)	1247	if (!w->next)
891	{	1248	{
892	struct sigaction sa;	1249	struct sigaction sa;
893	sa.sa_handler = sighandler;	1250	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1251	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1253	sigaction (w->signum, &sa, 0);
897	}	1254	}
898	}	1255	}
899		1256
900	void	1257	void
901	ev_signal_stop (struct ev_signal *w)	1258	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1259	{
903	ev_clear_pending ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
905	return;	1262	return;
906		1263
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1265	ev_stop (EV_A_ (W)w);
909		1266
910	if (!signals [w->signum - 1].head)	1267	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1268	signal (w->signum, SIG_DFL);
912	}	1269	}
913		1270
914	void	1271	void
915	ev_idle_start (struct ev_idle *w)	1272	ev_child_start (EV_P_ struct ev_child *w)
916	{	1273	{
		1274	#if EV_MULTIPLICITY
		1275	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1276	#endif
917	if (ev_is_active (w))	1277	if (ev_is_active (w))
918	return;	1278	return;
919		1279
920	ev_start ((W)w, ++idlecnt);	1280	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1282	}
924		1283
925	void	1284	void
926	ev_idle_stop (struct ev_idle *w)	1285	ev_child_stop (EV_P_ struct ev_child *w)
927	{	1286	{
928	ev_clear_pending ((W)w);	1287	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1288	if (ev_is_active (w))
930	return;	1289	return;
931		1290
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)
982	{
983	if (ev_is_active (w))
984	return;
985
986	ev_start ((W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}
989
990	void
991	ev_child_stop (struct ev_child *w)
992	{
993	ev_clear_pending ((W)w);
994	if (ev_is_active (w))
995	return;
996
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1292	ev_stop (EV_A_ (W)w);
999	}	1293	}
1000		1294
1001	/*****************************************************************************/	1295	/*****************************************************************************/
1002		1296
1003	struct ev_once	1297	struct ev_once
…		…
1007	void (cb)(int revents, void arg);	1301	void (cb)(int revents, void arg);
1008	void *arg;	1302	void *arg;
1009	};	1303	};
1010		1304
1011	static void	1305	static void
1012	once_cb (struct ev_once *once, int revents)	1306	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1307	{
1014	void (cb)(int revents, void arg) = once->cb;	1308	void (cb)(int revents, void arg) = once->cb;
1015	void *arg = once->arg;	1309	void *arg = once->arg;
1016		1310
1017	ev_io_stop (&once->io);	1311	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1312	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1313	free (once);
1020		1314
1021	cb (revents, arg);	1315	cb (revents, arg);
1022	}	1316	}
1023		1317
1024	static void	1318	static void
1025	once_cb_io (struct ev_io *w, int revents)	1319	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1320	{
1027	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);
1028	}	1322	}
1029		1323
1030	static void	1324	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1326	{
1033	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);
1034	}	1328	}
1035		1329
1036	void	1330	void
1037	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)
1038	{	1332	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1333	struct ev_once *once = malloc (sizeof (struct ev_once));
1040		1334
1041	if (!once)	1335	if (!once)
1042	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1336	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1047		1341
1048	ev_watcher_init (&once->io, once_cb_io);	1342	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1343	if (fd >= 0)
1050	{	1344	{
1051	ev_io_set (&once->io, fd, events);	1345	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1346	ev_io_start (EV_A_ &once->io);
1053	}	1347	}
1054		1348
1055	ev_watcher_init (&once->to, once_cb_to);	1349	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1350	if (timeout >= 0.)
1057	{	1351	{
1058	ev_timer_set (&once->to, timeout, 0.);	1352	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1353	ev_timer_start (EV_A_ &once->to);
1060	}	1354	}
1061	}	1355	}
1062	}	1356	}
1063		1357
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}
1141
1142	#endif
1143
1144
1145
1146

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs. Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs.
Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC