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

Comparing libev/ev.c (file contents):
Revision 1.32 by root, Thu Nov 1 09:21:51 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 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_STANDALONE
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_USE_POLL
		64	# define EV_USE_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
75	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		113
77	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
80		117
81	static ev_tstamp now, diff; /* monotonic clock */	118	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		119
91	/*****************************************************************************/	120	/*****************************************************************************/
92		121
93	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
94	ev_time (void)	156	ev_time (void)
95	{	157	{
96	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
97	struct timespec ts;	159	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	166	#endif
105	}	167	}
106		168
107	static ev_tstamp	169	inline ev_tstamp
108	get_clock (void)	170	get_clock (void)
109	{	171	{
110	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
111	if (have_monotonic)	173	if (expect_true (have_monotonic))
112	{	174	{
113	struct timespec ts;	175	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	178	}
117	#endif	179	#endif
118		180
119	return ev_time ();	181	return ev_time ();
120	}	182	}
121		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
123		191
124	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
126	{ \	194	{ \
127	int newcnt = cur; \	195	int newcnt = cur; \
128	do \	196	do \
129	{ \	197	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	204	cur = newcnt; \
137	}	205	}
138		206
139	/*****************************************************************************/	207	/*****************************************************************************/
140		208
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149
150	static void	209	static void
151	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
152	{	211	{
153	while (count--)	212	while (count--)
154	{	213	{
155	base->head = 0;	214	base->head = 0;
156	base->events = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
157	++base;	218	++base;
158	}	219	}
159	}	220	}
160		221
161	typedef struct
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void	222	static void
171	event (W w, int events)	223	event (EV_P_ W w, int events)
172	{	224	{
173	if (w->pending)	225	if (w->pending)
174	{	226	{
175	pendings [w->pending - 1].events \|= events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
176	return;	228	return;
177	}	229	}
178		230
179	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
180	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
181	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
182	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
183	}	235	}
184		236
185	static void	237	static void
186	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
187	{	239	{
188	int i;	240	int i;
189		241
190	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);	243	event (EV_A_ events [i], type);
192	}	244	}
193		245
194	static void	246	static void
195	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
196	{	248	{
197	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
198	struct ev_io *w;	250	struct ev_io *w;
199		251
200	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
201	{	253	{
202	int ev = w->events & events;	254	int ev = w->events & events;
203		255
204	if (ev)	256	if (ev)
205	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
206	}	258	}
207	}	259	}
208		260
209	/*****************************************************************************/	261	/*****************************************************************************/
210		262
211	static int *fdchanges;
212	static int fdchangemax, fdchangecnt;
213
214	static void	263	static void
215	fd_reify (void)	264	fd_reify (EV_P)
216	{	265	{
217	int i;	266	int i;
218		267
219	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
220	{	269	{
…		…
222	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
223	struct ev_io *w;	272	struct ev_io *w;
224		273
225	int events = 0;	274	int events = 0;
226		275
227	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
228	events \|= w->events;	277	events \|= w->events;
229		278
230	anfd->events &= ~EV_REIFY;	279	anfd->reify = 0;
231		280
232	if (anfd->events != events)	281	if (anfd->events != events)
233	{	282	{
234	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
235	anfd->events = events;	284	anfd->events = events;
236	}	285	}
237	}	286	}
238		287
239	fdchangecnt = 0;	288	fdchangecnt = 0;
240	}	289	}
241		290
242	static void	291	static void
243	fd_change (int fd)	292	fd_change (EV_P_ int fd)
244	{	293	{
245	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	294	if (anfds [fd].reify \|\| fdchangecnt < 0)
246	return;	295	return;
247		296
248	anfds [fd].events \|= EV_REIFY;	297	anfds [fd].reify = 1;
249		298
250	++fdchangecnt;	299	++fdchangecnt;
251	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
252	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
253	}	302	}
254		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
		314	}
		315
255	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
256	static void	317	static void
257	fd_recheck (void)	318	fd_ebadf (EV_P)
258	{	319	{
259	int fd;	320	int fd;
260		321
261	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
262	if (anfds [fd].events)	323	if (anfds [fd].events)
263	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
264	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
265	{	336	{
266	ev_io_stop (anfds [fd].head);	337	close (fd);
267	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	338	fd_kill (EV_A_ fd);
		339	return;
268	}	340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
269	}	356	}
270		357
271	/*****************************************************************************/	358	/*****************************************************************************/
272		359
273	static struct ev_timer **timers;
274	static int timermax, timercnt;
275
276	static struct ev_periodic **periodics;
277	static int periodicmax, periodiccnt;
278
279	static void	360	static void
280	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
281	{	362	{
282	WT w = timers [k];	363	WT w = heap [k];
283		364
284	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
285	{	366	{
286	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
287	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
288	k >>= 1;	369	k >>= 1;
289	}	370	}
290		371
291	timers [k] = w;	372	heap [k] = w;
292	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
293		374
294	}	375	}
295		376
296	static void	377	static void
297	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
298	{	379	{
299	WT w = timers [k];	380	WT w = heap [k];
300		381
301	while (k < (N >> 1))	382	while (k < (N >> 1))
302	{	383	{
303	int j = k << 1;	384	int j = k << 1;
304		385
305	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
306	++j;	387	++j;
307		388
308	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
309	break;	390	break;
310		391
311	timers [k] = timers [j];	392	heap [k] = heap [j];
312	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
313	k = j;	394	k = j;
314	}	395	}
315		396
316	timers [k] = w;	397	heap [k] = w;
317	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
318	}	399	}
319		400
320	/*****************************************************************************/	401	/*****************************************************************************/
321		402
322	typedef struct	403	typedef struct
323	{	404	{
324	struct ev_signal *head;	405	struct ev_watcher_list *head;
325	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
326	} ANSIG;	407	} ANSIG;
327		408
328	static ANSIG *signals;	409	static ANSIG *signals;
329	static int signalmax;	410	static int signalmax;
330		411
331	static int sigpipe [2];	412	static int sigpipe [2];
332	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
333	static struct ev_io sigev;	414	static struct ev_io sigev;
334		415
335	static void	416	static void
336	signals_init (ANSIG *base, int count)	417	signals_init (ANSIG *base, int count)
337	{	418	{
338	while (count--)	419	while (count--)
339	{	420	{
340	base->head = 0;	421	base->head = 0;
341	base->gotsig = 0;	422	base->gotsig = 0;
		423
342	++base;	424	++base;
343	}	425	}
344	}	426	}
345		427
346	static void	428	static void
…		…
348	{	430	{
349	signals [signum - 1].gotsig = 1;	431	signals [signum - 1].gotsig = 1;
350		432
351	if (!gotsig)	433	if (!gotsig)
352	{	434	{
		435	int old_errno = errno;
353	gotsig = 1;	436	gotsig = 1;
354	write (sigpipe [1], &gotsig, 1);	437	write (sigpipe [1], &signum, 1);
		438	errno = old_errno;
355	}	439	}
356	}	440	}
357		441
358	static void	442	static void
359	sigcb (struct ev_io *iow, int revents)	443	sigcb (EV_P_ struct ev_io *iow, int revents)
360	{	444	{
361	struct ev_signal *w;	445	struct ev_watcher_list *w;
362	int sig;	446	int signum;
363		447
		448	read (sigpipe [0], &revents, 1);
364	gotsig = 0;	449	gotsig = 0;
365	read (sigpipe [0], &revents, 1);
366		450
367	for (sig = signalmax; sig--; )	451	for (signum = signalmax; signum--; )
368	if (signals [sig].gotsig)	452	if (signals [signum].gotsig)
369	{	453	{
370	signals [sig].gotsig = 0;	454	signals [signum].gotsig = 0;
371		455
372	for (w = signals [sig].head; w; w = w->next)	456	for (w = signals [signum].head; w; w = w->next)
373	event ((W)w, EV_SIGNAL);	457	event (EV_A_ (W)w, EV_SIGNAL);
374	}	458	}
375	}	459	}
376		460
377	static void	461	static void
378	siginit (void)	462	siginit (EV_P)
379	{	463	{
		464	#ifndef WIN32
380	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
381	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
382		467
383	/* rather than sort out wether we really need nb, set it */	468	/* rather than sort out wether we really need nb, set it */
384	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
385	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		471	#endif
386		472
387	ev_io_set (&sigev, sigpipe [0], EV_READ);	473	ev_io_set (&sigev, sigpipe [0], EV_READ);
388	ev_io_start (&sigev);	474	ev_io_start (EV_A_ &sigev);
		475	ev_unref (EV_A); /* child watcher should not keep loop alive */
389	}	476	}
390		477
391	/*****************************************************************************/	478	/*****************************************************************************/
392		479
393	static struct ev_idle **idles;	480	#ifndef WIN32
394	static int idlemax, idlecnt;
395
396	static struct ev_prepare **prepares;
397	static int preparemax, preparecnt;
398
399	static struct ev_check **checks;
400	static int checkmax, checkcnt;
401
402	/*****************************************************************************/
403		481
404	static struct ev_child *childs [PID_HASHSIZE];	482	static struct ev_child *childs [PID_HASHSIZE];
405	static struct ev_signal childev;	483	static struct ev_signal childev;
406		484
407	#ifndef WCONTINUED	485	#ifndef WCONTINUED
408	# define WCONTINUED 0	486	# define WCONTINUED 0
409	#endif	487	#endif
410		488
411	static void	489	static void
412	childcb (struct ev_signal *sw, int revents)	490	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
413	{	491	{
414	struct ev_child *w;	492	struct ev_child *w;
		493
		494	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		495	if (w->pid == pid \|\| !w->pid)
		496	{
		497	w->priority = sw->priority; /* need to do it now */
		498	w->rpid = pid;
		499	w->rstatus = status;
		500	event (EV_A_ (W)w, EV_CHILD);
		501	}
		502	}
		503
		504	static void
		505	childcb (EV_P_ struct ev_signal *sw, int revents)
		506	{
415	int pid, status;	507	int pid, status;
416		508
417	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	509	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
418	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	510	{
419	if (w->pid == pid \|\| w->pid == -1)	511	/* make sure we are called again until all childs have been reaped */
420	{	512	event (EV_A_ (W)sw, EV_SIGNAL);
421	w->status = status;	513
422	event ((W)w, EV_CHILD);	514	child_reap (EV_A_ sw, pid, pid, status);
423	}	515	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		516	}
424	}	517	}
		518
		519	#endif
425		520
426	/*****************************************************************************/	521	/*****************************************************************************/
427		522
		523	#if EV_USE_KQUEUE
		524	# include "ev_kqueue.c"
		525	#endif
428	#if EV_USE_EPOLL	526	#if EV_USE_EPOLL
429	# include "ev_epoll.c"	527	# include "ev_epoll.c"
430	#endif	528	#endif
		529	#if EV_USE_POLL
		530	# include "ev_poll.c"
		531	#endif
431	#if EV_USE_SELECT	532	#if EV_USE_SELECT
432	# include "ev_select.c"	533	# include "ev_select.c"
433	#endif	534	#endif
434		535
435	int	536	int
…		…
442	ev_version_minor (void)	543	ev_version_minor (void)
443	{	544	{
444	return EV_VERSION_MINOR;	545	return EV_VERSION_MINOR;
445	}	546	}
446		547
447	int ev_init (int flags)	548	/* return true if we are running with elevated privileges and should ignore env variables */
		549	static int
		550	enable_secure (void)
448	{	551	{
		552	#ifdef WIN32
		553	return 0;
		554	#else
		555	return getuid () != geteuid ()
		556	\|\| getgid () != getegid ();
		557	#endif
		558	}
		559
		560	int
		561	ev_method (EV_P)
		562	{
		563	return method;
		564	}
		565
		566	static void
		567	loop_init (EV_P_ int methods)
		568	{
449	if (!ev_method)	569	if (!method)
450	{	570	{
451	#if EV_USE_MONOTONIC	571	#if EV_USE_MONOTONIC
452	{	572	{
453	struct timespec ts;	573	struct timespec ts;
454	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
455	have_monotonic = 1;	575	have_monotonic = 1;
456	}	576	}
457	#endif	577	#endif
458		578
459	ev_now = ev_time ();	579	rt_now = ev_time ();
460	now = get_clock ();	580	mn_now = get_clock ();
		581	now_floor = mn_now;
461	diff = ev_now - now;	582	rtmn_diff = rt_now - mn_now;
462		583
463	if (pipe (sigpipe))	584	if (methods == EVMETHOD_AUTO)
464	return 0;	585	if (!enable_secure () && getenv ("LIBEV_METHODS"))
465		586	methods = atoi (getenv ("LIBEV_METHODS"));
		587	else
466	ev_method = EVMETHOD_NONE;	588	methods = EVMETHOD_ANY;
		589
		590	method = 0;
		591	#if EV_USE_KQUEUE
		592	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		593	#endif
467	#if EV_USE_EPOLL	594	#if EV_USE_EPOLL
468	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	595	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		596	#endif
		597	#if EV_USE_POLL
		598	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
469	#endif	599	#endif
470	#if EV_USE_SELECT	600	#if EV_USE_SELECT
471	if (ev_method == EVMETHOD_NONE) select_init (flags);	601	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
472	#endif	602	#endif
		603	}
		604	}
473		605
		606	void
		607	loop_destroy (EV_P)
		608	{
		609	#if EV_USE_KQUEUE
		610	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		611	#endif
		612	#if EV_USE_EPOLL
		613	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		614	#endif
		615	#if EV_USE_POLL
		616	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		617	#endif
		618	#if EV_USE_SELECT
		619	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		620	#endif
		621
		622	method = 0;
		623	/TODO/
		624	}
		625
		626	void
		627	loop_fork (EV_P)
		628	{
		629	/TODO/
		630	#if EV_USE_EPOLL
		631	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		632	#endif
		633	#if EV_USE_KQUEUE
		634	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		635	#endif
		636	}
		637
		638	#if EV_MULTIPLICITY
		639	struct ev_loop *
		640	ev_loop_new (int methods)
		641	{
		642	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		643
		644	loop_init (EV_A_ methods);
		645
		646	if (ev_methods (EV_A))
		647	return loop;
		648
		649	return 0;
		650	}
		651
		652	void
		653	ev_loop_destroy (EV_P)
		654	{
		655	loop_destroy (EV_A);
		656	free (loop);
		657	}
		658
		659	void
		660	ev_loop_fork (EV_P)
		661	{
		662	loop_fork (EV_A);
		663	}
		664
		665	#endif
		666
		667	#if EV_MULTIPLICITY
		668	struct ev_loop default_loop_struct;
		669	static struct ev_loop *default_loop;
		670
		671	struct ev_loop *
		672	#else
		673	static int default_loop;
		674
		675	int
		676	#endif
		677	ev_default_loop (int methods)
		678	{
		679	if (sigpipe [0] == sigpipe [1])
		680	if (pipe (sigpipe))
		681	return 0;
		682
		683	if (!default_loop)
		684	{
		685	#if EV_MULTIPLICITY
		686	struct ev_loop *loop = default_loop = &default_loop_struct;
		687	#else
		688	default_loop = 1;
		689	#endif
		690
		691	loop_init (EV_A_ methods);
		692
474	if (ev_method)	693	if (ev_method (EV_A))
475	{	694	{
476	ev_watcher_init (&sigev, sigcb);	695	ev_watcher_init (&sigev, sigcb);
		696	ev_set_priority (&sigev, EV_MAXPRI);
477	siginit ();	697	siginit (EV_A);
478		698
		699	#ifndef WIN32
479	ev_signal_init (&childev, childcb, SIGCHLD);	700	ev_signal_init (&childev, childcb, SIGCHLD);
		701	ev_set_priority (&childev, EV_MAXPRI);
480	ev_signal_start (&childev);	702	ev_signal_start (EV_A_ &childev);
		703	ev_unref (EV_A); /* child watcher should not keep loop alive */
		704	#endif
481	}	705	}
		706	else
		707	default_loop = 0;
482	}	708	}
483		709
484	return ev_method;	710	return default_loop;
485	}	711	}
486		712
487	/*****************************************************************************/
488
489	void	713	void
490	ev_prefork (void)	714	ev_default_destroy (void)
491	{	715	{
492	/* nop */	716	#if EV_MULTIPLICITY
493	}	717	struct ev_loop *loop = default_loop;
494
495	void
496	ev_postfork_parent (void)
497	{
498	/* nop */
499	}
500
501	void
502	ev_postfork_child (void)
503	{
504	#if EV_USE_EPOLL
505	if (ev_method == EVMETHOD_EPOLL)
506	epoll_postfork_child ();
507	#endif	718	#endif
508		719
		720	ev_ref (EV_A); /* child watcher */
		721	ev_signal_stop (EV_A_ &childev);
		722
		723	ev_ref (EV_A); /* signal watcher */
509	ev_io_stop (&sigev);	724	ev_io_stop (EV_A_ &sigev);
		725
		726	close (sigpipe [0]); sigpipe [0] = 0;
		727	close (sigpipe [1]); sigpipe [1] = 0;
		728
		729	loop_destroy (EV_A);
		730	}
		731
		732	void
		733	ev_default_fork (EV_P)
		734	{
		735	loop_fork (EV_A);
		736
		737	ev_io_stop (EV_A_ &sigev);
510	close (sigpipe [0]);	738	close (sigpipe [0]);
511	close (sigpipe [1]);	739	close (sigpipe [1]);
512	pipe (sigpipe);	740	pipe (sigpipe);
		741
		742	ev_ref (EV_A); /* signal watcher */
513	siginit ();	743	siginit (EV_A);
514	}	744	}
515		745
516	/*****************************************************************************/	746	/*****************************************************************************/
517		747
518	static void	748	static void
519	call_pending (void)	749	call_pending (EV_P)
520	{	750	{
		751	int pri;
		752
		753	for (pri = NUMPRI; pri--; )
521	while (pendingcnt)	754	while (pendingcnt [pri])
522	{	755	{
523	ANPENDING *p = pendings + --pendingcnt;	756	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
524		757
525	if (p->w)	758	if (p->w)
526	{	759	{
527	p->w->pending = 0;	760	p->w->pending = 0;
528	p->w->cb (p->w, p->events);	761	p->w->cb (EV_A_ p->w, p->events);
529	}	762	}
530	}	763	}
531	}	764	}
532		765
533	static void	766	static void
534	timers_reify (void)	767	timers_reify (EV_P)
535	{	768	{
536	while (timercnt && timers [0]->at <= now)	769	while (timercnt && timers [0]->at <= mn_now)
537	{	770	{
538	struct ev_timer *w = timers [0];	771	struct ev_timer *w = timers [0];
539		772
540	/* first reschedule or stop timer */	773	/* first reschedule or stop timer */
541	if (w->repeat)	774	if (w->repeat)
542	{	775	{
		776	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
543	w->at = now + w->repeat;	777	w->at = mn_now + w->repeat;
544	assert (("timer timeout in the past, negative repeat?", w->at > now));
545	downheap ((WT *)timers, timercnt, 0);	778	downheap ((WT *)timers, timercnt, 0);
546	}	779	}
547	else	780	else
548	ev_timer_stop (w); /* nonrepeating: stop timer */	781	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
549		782
550	event ((W)w, EV_TIMEOUT);	783	event (EV_A_ (W)w, EV_TIMEOUT);
551	}	784	}
552	}	785	}
553		786
554	static void	787	static void
555	periodics_reify (void)	788	periodics_reify (EV_P)
556	{	789	{
557	while (periodiccnt && periodics [0]->at <= ev_now)	790	while (periodiccnt && periodics [0]->at <= rt_now)
558	{	791	{
559	struct ev_periodic *w = periodics [0];	792	struct ev_periodic *w = periodics [0];
560		793
561	/* first reschedule or stop timer */	794	/* first reschedule or stop timer */
562	if (w->interval)	795	if (w->interval)
563	{	796	{
564	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	797	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
565	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	798	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
566	downheap ((WT *)periodics, periodiccnt, 0);	799	downheap ((WT *)periodics, periodiccnt, 0);
567	}	800	}
568	else	801	else
569	ev_periodic_stop (w); /* nonrepeating: stop timer */	802	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
570		803
571	event ((W)w, EV_TIMEOUT);	804	event (EV_A_ (W)w, EV_PERIODIC);
572	}	805	}
573	}	806	}
574		807
575	static void	808	static void
576	periodics_reschedule (ev_tstamp diff)	809	periodics_reschedule (EV_P)
577	{	810	{
578	int i;	811	int i;
579		812
580	/* adjust periodics after time jump */	813	/* adjust periodics after time jump */
581	for (i = 0; i < periodiccnt; ++i)	814	for (i = 0; i < periodiccnt; ++i)
582	{	815	{
583	struct ev_periodic *w = periodics [i];	816	struct ev_periodic *w = periodics [i];
584		817
585	if (w->interval)	818	if (w->interval)
586	{	819	{
587	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	820	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
588		821
589	if (fabs (diff) >= 1e-4)	822	if (fabs (diff) >= 1e-4)
590	{	823	{
591	ev_periodic_stop (w);	824	ev_periodic_stop (EV_A_ w);
592	ev_periodic_start (w);	825	ev_periodic_start (EV_A_ w);
593		826
594	i = 0; /* restart loop, inefficient, but time jumps should be rare */	827	i = 0; /* restart loop, inefficient, but time jumps should be rare */
595	}	828	}
596	}	829	}
597	}	830	}
598	}	831	}
599		832
		833	inline int
		834	time_update_monotonic (EV_P)
		835	{
		836	mn_now = get_clock ();
		837
		838	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		839	{
		840	rt_now = rtmn_diff + mn_now;
		841	return 0;
		842	}
		843	else
		844	{
		845	now_floor = mn_now;
		846	rt_now = ev_time ();
		847	return 1;
		848	}
		849	}
		850
600	static void	851	static void
601	time_update (void)	852	time_update (EV_P)
602	{	853	{
603	int i;	854	int i;
604		855
605	ev_now = ev_time ();	856	#if EV_USE_MONOTONIC
606
607	if (have_monotonic)	857	if (expect_true (have_monotonic))
608	{	858	{
609	ev_tstamp odiff = diff;	859	if (time_update_monotonic (EV_A))
610
611	for (i = 4; --i; ) /* loop a few times, before making important decisions */
612	{	860	{
613	now = get_clock ();	861	ev_tstamp odiff = rtmn_diff;
		862
		863	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		864	{
614	diff = ev_now - now;	865	rtmn_diff = rt_now - mn_now;
615		866
616	if (fabs (odiff - diff) < MIN_TIMEJUMP)	867	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
617	return; /* all is well */	868	return; /* all is well */
618		869
619	ev_now = ev_time ();	870	rt_now = ev_time ();
		871	mn_now = get_clock ();
		872	now_floor = mn_now;
		873	}
		874
		875	periodics_reschedule (EV_A);
		876	/* no timer adjustment, as the monotonic clock doesn't jump */
		877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
620	}	878	}
621
622	periodics_reschedule (diff - odiff);
623	/* no timer adjustment, as the monotonic clock doesn't jump */
624	}	879	}
625	else	880	else
		881	#endif
626	{	882	{
627	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	883	rt_now = ev_time ();
		884
		885	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
628	{	886	{
629	periodics_reschedule (ev_now - now);	887	periodics_reschedule (EV_A);
630		888
631	/* adjust timers. this is easy, as the offset is the same for all */	889	/* adjust timers. this is easy, as the offset is the same for all */
632	for (i = 0; i < timercnt; ++i)	890	for (i = 0; i < timercnt; ++i)
633	timers [i]->at += diff;	891	timers [i]->at += rt_now - mn_now;
634	}	892	}
635		893
636	now = ev_now;	894	mn_now = rt_now;
637	}	895	}
638	}	896	}
639		897
640	int ev_loop_done;	898	void
		899	ev_ref (EV_P)
		900	{
		901	++activecnt;
		902	}
641		903
		904	void
		905	ev_unref (EV_P)
		906	{
		907	--activecnt;
		908	}
		909
		910	static int loop_done;
		911
		912	void
642	void ev_loop (int flags)	913	ev_loop (EV_P_ int flags)
643	{	914	{
644	double block;	915	double block;
645	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	916	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
646		917
647	do	918	do
648	{	919	{
649	/* queue check watchers (and execute them) */	920	/* queue check watchers (and execute them) */
650	if (preparecnt)	921	if (expect_false (preparecnt))
651	{	922	{
652	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	923	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
653	call_pending ();	924	call_pending (EV_A);
654	}	925	}
655		926
656	/* update fd-related kernel structures */	927	/* update fd-related kernel structures */
657	fd_reify ();	928	fd_reify (EV_A);
658		929
659	/* calculate blocking time */	930	/* calculate blocking time */
660		931
661	/* we only need this for !monotonic clockor timers, but as we basically	932	/* we only need this for !monotonic clockor timers, but as we basically
662	always have timers, we just calculate it always */	933	always have timers, we just calculate it always */
		934	#if EV_USE_MONOTONIC
		935	if (expect_true (have_monotonic))
		936	time_update_monotonic (EV_A);
		937	else
		938	#endif
		939	{
663	ev_now = ev_time ();	940	rt_now = ev_time ();
		941	mn_now = rt_now;
		942	}
664		943
665	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	944	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
666	block = 0.;	945	block = 0.;
667	else	946	else
668	{	947	{
669	block = MAX_BLOCKTIME;	948	block = MAX_BLOCKTIME;
670		949
671	if (timercnt)	950	if (timercnt)
672	{	951	{
673	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	952	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
674	if (block > to) block = to;	953	if (block > to) block = to;
675	}	954	}
676		955
677	if (periodiccnt)	956	if (periodiccnt)
678	{	957	{
679	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	958	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
680	if (block > to) block = to;	959	if (block > to) block = to;
681	}	960	}
682		961
683	if (block < 0.) block = 0.;	962	if (block < 0.) block = 0.;
684	}	963	}
685		964
686	method_poll (block);	965	method_poll (EV_A_ block);
687		966
688	/* update ev_now, do magic */	967	/* update rt_now, do magic */
689	time_update ();	968	time_update (EV_A);
690		969
691	/* queue pending timers and reschedule them */	970	/* queue pending timers and reschedule them */
692	timers_reify (); /* relative timers called last */	971	timers_reify (EV_A); /* relative timers called last */
693	periodics_reify (); /* absolute timers called first */	972	periodics_reify (EV_A); /* absolute timers called first */
694		973
695	/* queue idle watchers unless io or timers are pending */	974	/* queue idle watchers unless io or timers are pending */
696	if (!pendingcnt)	975	if (!pendingcnt)
697	queue_events ((W *)idles, idlecnt, EV_IDLE);	976	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
698		977
699	/* queue check watchers, to be executed first */	978	/* queue check watchers, to be executed first */
700	if (checkcnt)	979	if (checkcnt)
701	queue_events ((W *)checks, checkcnt, EV_CHECK);	980	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
702		981
703	call_pending ();	982	call_pending (EV_A);
704	}	983	}
705	while (!ev_loop_done);	984	while (activecnt && !loop_done);
706		985
707	if (ev_loop_done != 2)	986	if (loop_done != 2)
708	ev_loop_done = 0;	987	loop_done = 0;
		988	}
		989
		990	void
		991	ev_unloop (EV_P_ int how)
		992	{
		993	loop_done = how;
709	}	994	}
710		995
711	/*****************************************************************************/	996	/*****************************************************************************/
712		997
713	static void	998	inline void
714	wlist_add (WL *head, WL elem)	999	wlist_add (WL *head, WL elem)
715	{	1000	{
716	elem->next = *head;	1001	elem->next = *head;
717	*head = elem;	1002	*head = elem;
718	}	1003	}
719		1004
720	static void	1005	inline void
721	wlist_del (WL *head, WL elem)	1006	wlist_del (WL *head, WL elem)
722	{	1007	{
723	while (*head)	1008	while (*head)
724	{	1009	{
725	if (*head == elem)	1010	if (*head == elem)
…		…
730		1015
731	head = &(*head)->next;	1016	head = &(*head)->next;
732	}	1017	}
733	}	1018	}
734		1019
735	static void	1020	inline void
736	ev_clear (W w)	1021	ev_clear_pending (EV_P_ W w)
737	{	1022	{
738	if (w->pending)	1023	if (w->pending)
739	{	1024	{
740	pendings [w->pending - 1].w = 0;	1025	pendings [ABSPRI (w)][w->pending - 1].w = 0;
741	w->pending = 0;	1026	w->pending = 0;
742	}	1027	}
743	}	1028	}
744		1029
745	static void	1030	inline void
746	ev_start (W w, int active)	1031	ev_start (EV_P_ W w, int active)
747	{	1032	{
		1033	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1034	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1035
748	w->active = active;	1036	w->active = active;
		1037	ev_ref (EV_A);
749	}	1038	}
750		1039
751	static void	1040	inline void
752	ev_stop (W w)	1041	ev_stop (EV_P_ W w)
753	{	1042	{
		1043	ev_unref (EV_A);
754	w->active = 0;	1044	w->active = 0;
755	}	1045	}
756		1046
757	/*****************************************************************************/	1047	/*****************************************************************************/
758		1048
759	void	1049	void
760	ev_io_start (struct ev_io *w)	1050	ev_io_start (EV_P_ struct ev_io *w)
761	{	1051	{
		1052	int fd = w->fd;
		1053
762	if (ev_is_active (w))	1054	if (ev_is_active (w))
763	return;	1055	return;
764		1056
765	int fd = w->fd;	1057	assert (("ev_io_start called with negative fd", fd >= 0));
766		1058
767	ev_start ((W)w, 1);	1059	ev_start (EV_A_ (W)w, 1);
768	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1060	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
769	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1061	wlist_add ((WL *)&anfds[fd].head, (WL)w);
770		1062
771	fd_change (fd);	1063	fd_change (EV_A_ fd);
772	}	1064	}
773		1065
774	void	1066	void
775	ev_io_stop (struct ev_io *w)	1067	ev_io_stop (EV_P_ struct ev_io *w)
776	{	1068	{
777	ev_clear ((W)w);	1069	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1070	if (!ev_is_active (w))
779	return;	1071	return;
780		1072
781	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1073	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
782	ev_stop ((W)w);	1074	ev_stop (EV_A_ (W)w);
783		1075
784	fd_change (w->fd);	1076	fd_change (EV_A_ w->fd);
785	}	1077	}
786		1078
787	void	1079	void
788	ev_timer_start (struct ev_timer *w)	1080	ev_timer_start (EV_P_ struct ev_timer *w)
789	{	1081	{
790	if (ev_is_active (w))	1082	if (ev_is_active (w))
791	return;	1083	return;
792		1084
793	w->at += now;	1085	w->at += mn_now;
794		1086
795	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1087	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
796		1088
797	ev_start ((W)w, ++timercnt);	1089	ev_start (EV_A_ (W)w, ++timercnt);
798	array_needsize (timers, timermax, timercnt, );	1090	array_needsize (timers, timermax, timercnt, );
799	timers [timercnt - 1] = w;	1091	timers [timercnt - 1] = w;
800	upheap ((WT *)timers, timercnt - 1);	1092	upheap ((WT *)timers, timercnt - 1);
801	}	1093	}
802		1094
803	void	1095	void
804	ev_timer_stop (struct ev_timer *w)	1096	ev_timer_stop (EV_P_ struct ev_timer *w)
805	{	1097	{
806	ev_clear ((W)w);	1098	ev_clear_pending (EV_A_ (W)w);
807	if (!ev_is_active (w))	1099	if (!ev_is_active (w))
808	return;	1100	return;
809		1101
810	if (w->active < timercnt--)	1102	if (w->active < timercnt--)
811	{	1103	{
…		…
813	downheap ((WT *)timers, timercnt, w->active - 1);	1105	downheap ((WT *)timers, timercnt, w->active - 1);
814	}	1106	}
815		1107
816	w->at = w->repeat;	1108	w->at = w->repeat;
817		1109
818	ev_stop ((W)w);	1110	ev_stop (EV_A_ (W)w);
819	}	1111	}
820		1112
821	void	1113	void
822	ev_timer_again (struct ev_timer *w)	1114	ev_timer_again (EV_P_ struct ev_timer *w)
823	{	1115	{
824	if (ev_is_active (w))	1116	if (ev_is_active (w))
825	{	1117	{
826	if (w->repeat)	1118	if (w->repeat)
827	{	1119	{
828	w->at = now + w->repeat;	1120	w->at = mn_now + w->repeat;
829	downheap ((WT *)timers, timercnt, w->active - 1);	1121	downheap ((WT *)timers, timercnt, w->active - 1);
830	}	1122	}
831	else	1123	else
832	ev_timer_stop (w);	1124	ev_timer_stop (EV_A_ w);
833	}	1125	}
834	else if (w->repeat)	1126	else if (w->repeat)
835	ev_timer_start (w);	1127	ev_timer_start (EV_A_ w);
836	}	1128	}
837		1129
838	void	1130	void
839	ev_periodic_start (struct ev_periodic *w)	1131	ev_periodic_start (EV_P_ struct ev_periodic *w)
840	{	1132	{
841	if (ev_is_active (w))	1133	if (ev_is_active (w))
842	return;	1134	return;
843		1135
844	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1136	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
845		1137
846	/* this formula differs from the one in periodic_reify because we do not always round up */	1138	/* this formula differs from the one in periodic_reify because we do not always round up */
847	if (w->interval)	1139	if (w->interval)
848	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1140	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
849		1141
850	ev_start ((W)w, ++periodiccnt);	1142	ev_start (EV_A_ (W)w, ++periodiccnt);
851	array_needsize (periodics, periodicmax, periodiccnt, );	1143	array_needsize (periodics, periodicmax, periodiccnt, );
852	periodics [periodiccnt - 1] = w;	1144	periodics [periodiccnt - 1] = w;
853	upheap ((WT *)periodics, periodiccnt - 1);	1145	upheap ((WT *)periodics, periodiccnt - 1);
854	}	1146	}
855		1147
856	void	1148	void
857	ev_periodic_stop (struct ev_periodic *w)	1149	ev_periodic_stop (EV_P_ struct ev_periodic *w)
858	{	1150	{
859	ev_clear ((W)w);	1151	ev_clear_pending (EV_A_ (W)w);
860	if (!ev_is_active (w))	1152	if (!ev_is_active (w))
861	return;	1153	return;
862		1154
863	if (w->active < periodiccnt--)	1155	if (w->active < periodiccnt--)
864	{	1156	{
865	periodics [w->active - 1] = periodics [periodiccnt];	1157	periodics [w->active - 1] = periodics [periodiccnt];
866	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1158	downheap ((WT *)periodics, periodiccnt, w->active - 1);
867	}	1159	}
868		1160
869	ev_stop ((W)w);	1161	ev_stop (EV_A_ (W)w);
870	}	1162	}
871		1163
872	void	1164	void
873	ev_signal_start (struct ev_signal *w)	1165	ev_idle_start (EV_P_ struct ev_idle *w)
874	{	1166	{
875	if (ev_is_active (w))	1167	if (ev_is_active (w))
876	return;	1168	return;
877		1169
		1170	ev_start (EV_A_ (W)w, ++idlecnt);
		1171	array_needsize (idles, idlemax, idlecnt, );
		1172	idles [idlecnt - 1] = w;
		1173	}
		1174
		1175	void
		1176	ev_idle_stop (EV_P_ struct ev_idle *w)
		1177	{
		1178	ev_clear_pending (EV_A_ (W)w);
		1179	if (ev_is_active (w))
		1180	return;
		1181
		1182	idles [w->active - 1] = idles [--idlecnt];
		1183	ev_stop (EV_A_ (W)w);
		1184	}
		1185
		1186	void
		1187	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1188	{
		1189	if (ev_is_active (w))
		1190	return;
		1191
		1192	ev_start (EV_A_ (W)w, ++preparecnt);
		1193	array_needsize (prepares, preparemax, preparecnt, );
		1194	prepares [preparecnt - 1] = w;
		1195	}
		1196
		1197	void
		1198	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1199	{
		1200	ev_clear_pending (EV_A_ (W)w);
		1201	if (ev_is_active (w))
		1202	return;
		1203
		1204	prepares [w->active - 1] = prepares [--preparecnt];
		1205	ev_stop (EV_A_ (W)w);
		1206	}
		1207
		1208	void
		1209	ev_check_start (EV_P_ struct ev_check *w)
		1210	{
		1211	if (ev_is_active (w))
		1212	return;
		1213
		1214	ev_start (EV_A_ (W)w, ++checkcnt);
		1215	array_needsize (checks, checkmax, checkcnt, );
		1216	checks [checkcnt - 1] = w;
		1217	}
		1218
		1219	void
		1220	ev_check_stop (EV_P_ struct ev_check *w)
		1221	{
		1222	ev_clear_pending (EV_A_ (W)w);
		1223	if (ev_is_active (w))
		1224	return;
		1225
		1226	checks [w->active - 1] = checks [--checkcnt];
		1227	ev_stop (EV_A_ (W)w);
		1228	}
		1229
		1230	#ifndef SA_RESTART
		1231	# define SA_RESTART 0
		1232	#endif
		1233
		1234	void
		1235	ev_signal_start (EV_P_ struct ev_signal *w)
		1236	{
		1237	#if EV_MULTIPLICITY
		1238	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1239	#endif
		1240	if (ev_is_active (w))
		1241	return;
		1242
		1243	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1244
878	ev_start ((W)w, 1);	1245	ev_start (EV_A_ (W)w, 1);
879	array_needsize (signals, signalmax, w->signum, signals_init);	1246	array_needsize (signals, signalmax, w->signum, signals_init);
880	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1247	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
881		1248
882	if (!w->next)	1249	if (!w->next)
883	{	1250	{
884	struct sigaction sa;	1251	struct sigaction sa;
885	sa.sa_handler = sighandler;	1252	sa.sa_handler = sighandler;
886	sigfillset (&sa.sa_mask);	1253	sigfillset (&sa.sa_mask);
887	sa.sa_flags = 0;	1254	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
888	sigaction (w->signum, &sa, 0);	1255	sigaction (w->signum, &sa, 0);
889	}	1256	}
890	}	1257	}
891		1258
892	void	1259	void
893	ev_signal_stop (struct ev_signal *w)	1260	ev_signal_stop (EV_P_ struct ev_signal *w)
894	{	1261	{
895	ev_clear ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
896	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
897	return;	1264	return;
898		1265
899	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1266	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
900	ev_stop ((W)w);	1267	ev_stop (EV_A_ (W)w);
901		1268
902	if (!signals [w->signum - 1].head)	1269	if (!signals [w->signum - 1].head)
903	signal (w->signum, SIG_DFL);	1270	signal (w->signum, SIG_DFL);
904	}	1271	}
905		1272
906	void	1273	void
907	ev_idle_start (struct ev_idle *w)	1274	ev_child_start (EV_P_ struct ev_child *w)
908	{	1275	{
		1276	#if EV_MULTIPLICITY
		1277	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1278	#endif
909	if (ev_is_active (w))	1279	if (ev_is_active (w))
910	return;	1280	return;
911		1281
912	ev_start ((W)w, ++idlecnt);	1282	ev_start (EV_A_ (W)w, 1);
913	array_needsize (idles, idlemax, idlecnt, );	1283	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
914	idles [idlecnt - 1] = w;
915	}	1284	}
916		1285
917	void	1286	void
918	ev_idle_stop (struct ev_idle *w)	1287	ev_child_stop (EV_P_ struct ev_child *w)
919	{	1288	{
920	ev_clear ((W)w);	1289	ev_clear_pending (EV_A_ (W)w);
921	if (ev_is_active (w))	1290	if (ev_is_active (w))
922	return;	1291	return;
923		1292
924	idles [w->active - 1] = idles [--idlecnt];
925	ev_stop ((W)w);
926	}
927
928	void
929	ev_prepare_start (struct ev_prepare *w)
930	{
931	if (ev_is_active (w))
932	return;
933
934	ev_start ((W)w, ++preparecnt);
935	array_needsize (prepares, preparemax, preparecnt, );
936	prepares [preparecnt - 1] = w;
937	}
938
939	void
940	ev_prepare_stop (struct ev_prepare *w)
941	{
942	ev_clear ((W)w);
943	if (ev_is_active (w))
944	return;
945
946	prepares [w->active - 1] = prepares [--preparecnt];
947	ev_stop ((W)w);
948	}
949
950	void
951	ev_check_start (struct ev_check *w)
952	{
953	if (ev_is_active (w))
954	return;
955
956	ev_start ((W)w, ++checkcnt);
957	array_needsize (checks, checkmax, checkcnt, );
958	checks [checkcnt - 1] = w;
959	}
960
961	void
962	ev_check_stop (struct ev_check *w)
963	{
964	ev_clear ((W)w);
965	if (ev_is_active (w))
966	return;
967
968	checks [w->active - 1] = checks [--checkcnt];
969	ev_stop ((W)w);
970	}
971
972	void
973	ev_child_start (struct ev_child *w)
974	{
975	if (ev_is_active (w))
976	return;
977
978	ev_start ((W)w, 1);
979	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	}
981
982	void
983	ev_child_stop (struct ev_child *w)
984	{
985	ev_clear ((W)w);
986	if (ev_is_active (w))
987	return;
988
989	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1293	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	1294	ev_stop (EV_A_ (W)w);
991	}	1295	}
992		1296
993	/*****************************************************************************/	1297	/*****************************************************************************/
994		1298
995	struct ev_once	1299	struct ev_once
…		…
999	void (cb)(int revents, void arg);	1303	void (cb)(int revents, void arg);
1000	void *arg;	1304	void *arg;
1001	};	1305	};
1002		1306
1003	static void	1307	static void
1004	once_cb (struct ev_once *once, int revents)	1308	once_cb (EV_P_ struct ev_once *once, int revents)
1005	{	1309	{
1006	void (cb)(int revents, void arg) = once->cb;	1310	void (cb)(int revents, void arg) = once->cb;
1007	void *arg = once->arg;	1311	void *arg = once->arg;
1008		1312
1009	ev_io_stop (&once->io);	1313	ev_io_stop (EV_A_ &once->io);
1010	ev_timer_stop (&once->to);	1314	ev_timer_stop (EV_A_ &once->to);
1011	free (once);	1315	free (once);
1012		1316
1013	cb (revents, arg);	1317	cb (revents, arg);
1014	}	1318	}
1015		1319
1016	static void	1320	static void
1017	once_cb_io (struct ev_io *w, int revents)	1321	once_cb_io (EV_P_ struct ev_io *w, int revents)
1018	{	1322	{
1019	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1323	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1020	}	1324	}
1021		1325
1022	static void	1326	static void
1023	once_cb_to (struct ev_timer *w, int revents)	1327	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1024	{	1328	{
1025	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1329	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1026	}	1330	}
1027		1331
1028	void	1332	void
1029	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1333	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1030	{	1334	{
1031	struct ev_once *once = malloc (sizeof (struct ev_once));	1335	struct ev_once *once = malloc (sizeof (struct ev_once));
1032		1336
1033	if (!once)	1337	if (!once)
1034	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1338	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1039		1343
1040	ev_watcher_init (&once->io, once_cb_io);	1344	ev_watcher_init (&once->io, once_cb_io);
1041	if (fd >= 0)	1345	if (fd >= 0)
1042	{	1346	{
1043	ev_io_set (&once->io, fd, events);	1347	ev_io_set (&once->io, fd, events);
1044	ev_io_start (&once->io);	1348	ev_io_start (EV_A_ &once->io);
1045	}	1349	}
1046		1350
1047	ev_watcher_init (&once->to, once_cb_to);	1351	ev_watcher_init (&once->to, once_cb_to);
1048	if (timeout >= 0.)	1352	if (timeout >= 0.)
1049	{	1353	{
1050	ev_timer_set (&once->to, timeout, 0.);	1354	ev_timer_set (&once->to, timeout, 0.);
1051	ev_timer_start (&once->to);	1355	ev_timer_start (EV_A_ &once->to);
1052	}	1356	}
1053	}	1357	}
1054	}	1358	}
1055		1359
1056	/*****************************************************************************/
1057
1058	#if 0
1059
1060	struct ev_io wio;
1061
1062	static void
1063	sin_cb (struct ev_io *w, int revents)
1064	{
1065	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1066	}
1067
1068	static void
1069	ocb (struct ev_timer *w, int revents)
1070	{
1071	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1072	ev_timer_stop (w);
1073	ev_timer_start (w);
1074	}
1075
1076	static void
1077	scb (struct ev_signal *w, int revents)
1078	{
1079	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1080	ev_io_stop (&wio);
1081	ev_io_start (&wio);
1082	}
1083
1084	static void
1085	gcb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "generic %x\n", revents);
1088
1089	}
1090
1091	int main (void)
1092	{
1093	ev_init (0);
1094
1095	ev_io_init (&wio, sin_cb, 0, EV_READ);
1096	ev_io_start (&wio);
1097
1098	struct ev_timer t[10000];
1099
1100	#if 0
1101	int i;
1102	for (i = 0; i < 10000; ++i)
1103	{
1104	struct ev_timer *w = t + i;
1105	ev_watcher_init (w, ocb, i);
1106	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1107	ev_timer_start (w);
1108	if (drand48 () < 0.5)
1109	ev_timer_stop (w);
1110	}
1111	#endif
1112
1113	struct ev_timer t1;
1114	ev_timer_init (&t1, ocb, 5, 10);
1115	ev_timer_start (&t1);
1116
1117	struct ev_signal sig;
1118	ev_signal_init (&sig, scb, SIGQUIT);
1119	ev_signal_start (&sig);
1120
1121	struct ev_check cw;
1122	ev_check_init (&cw, gcb);
1123	ev_check_start (&cw);
1124
1125	struct ev_idle iw;
1126	ev_idle_init (&iw, gcb);
1127	ev_idle_start (&iw);
1128
1129	ev_loop (0);
1130
1131	return 0;
1132	}
1133
1134	#endif
1135
1136
1137
1138

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Comparing libev/ev.c (file contents): Revision 1.32 by root, Thu Nov 1 09:21:51 2007 UTC vs. Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.32 by root, Thu Nov 1 09:21:51 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC