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

Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 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
63	#ifndef EV_USE_REALTIME	75	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	76	# define EV_USE_REALTIME 1
65	#endif	77	#endif
		78
		79	/**/
		80
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
		89	#endif
		90
		91	/**/
66		92
67	#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) */
68	#define MAX_BLOCKTIME 59.731	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
70		97
		98	#ifndef EV_EMBED
71	#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)
72		115
73	typedef struct ev_watcher *W;	116	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	117	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	118	typedef struct ev_watcher_time *WT;
76		119
77	static ev_tstamp now, diff; /* monotonic clock */	120	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80
81	static int have_monotonic; /* runtime */
82
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		121
87	/*****************************************************************************/	122	/*****************************************************************************/
88		123
89	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
90	ev_time (void)	158	ev_time (void)
91	{	159	{
92	#if EV_USE_REALTIME	160	#if EV_USE_REALTIME
93	struct timespec ts;	161	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	162	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	166	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	167	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	168	#endif
101	}	169	}
102		170
103	static ev_tstamp	171	inline ev_tstamp
104	get_clock (void)	172	get_clock (void)
105	{	173	{
106	#if EV_USE_MONOTONIC	174	#if EV_USE_MONOTONIC
107	if (have_monotonic)	175	if (expect_true (have_monotonic))
108	{	176	{
109	struct timespec ts;	177	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	178	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	179	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	180	}
113	#endif	181	#endif
114		182
115	return ev_time ();	183	return ev_time ();
116	}	184	}
117		185
		186	ev_tstamp
		187	ev_now (EV_P)
		188	{
		189	return rt_now;
		190	}
		191
118	#define array_nextsize(n) (((n) << 1) \| 4 & ~3)	192	#define array_roundsize(base,n) ((n) \| 4 & ~3)
119	#define array_prevsize(n) (((n) >> 1) \| 4 & ~3)
120		193
121	#define array_needsize(base,cur,cnt,init) \	194	#define array_needsize(base,cur,cnt,init) \
122	if ((cnt) > cur) \	195	if (expect_false ((cnt) > cur)) \
123	{ \	196	{ \
124	int newcnt = cur; \	197	int newcnt = cur; \
125	do \	198	do \
126	{ \	199	{ \
127	newcnt = array_nextsize (newcnt); \	200	newcnt = array_roundsize (base, newcnt << 1); \
128	} \	201	} \
129	while ((cnt) > newcnt); \	202	while ((cnt) > newcnt); \
130	\	203	\
131	base = realloc (base, sizeof (base) (newcnt)); \	204	base = realloc (base, sizeof (base) (newcnt)); \
132	init (base + cur, newcnt - cur); \	205	init (base + cur, newcnt - cur); \
133	cur = newcnt; \	206	cur = newcnt; \
134	}	207	}
135		208
136	/*****************************************************************************/	209	/*****************************************************************************/
137		210
138	typedef struct
139	{
140	struct ev_io *head;
141	int events;
142	} ANFD;
143
144	static ANFD *anfds;
145	static int anfdmax;
146
147	static void	211	static void
148	anfds_init (ANFD *base, int count)	212	anfds_init (ANFD *base, int count)
149	{	213	{
150	while (count--)	214	while (count--)
151	{	215	{
152	base->head = 0;	216	base->head = 0;
153	base->events = EV_NONE;	217	base->events = EV_NONE;
		218	base->reify = 0;
		219
154	++base;	220	++base;
155	}	221	}
156	}	222	}
157		223
158	typedef struct
159	{
160	W w;
161	int events;
162	} ANPENDING;
163
164	static ANPENDING *pendings;
165	static int pendingmax, pendingcnt;
166
167	static void	224	static void
168	event (W w, int events)	225	event (EV_P_ W w, int events)
169	{	226	{
170	if (w->active)	227	if (w->pending)
171	{	228	{
172	w->pending = ++pendingcnt;
173	array_needsize (pendings, pendingmax, pendingcnt, );
174	pendings [pendingcnt - 1].w = w;
175	pendings [pendingcnt - 1].events = events;	229	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		230	return;
176	}	231	}
177	}
178		232
		233	w->pending = ++pendingcnt [ABSPRI (w)];
		234	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		235	pendings [ABSPRI (w)][w->pending - 1].w = w;
		236	pendings [ABSPRI (w)][w->pending - 1].events = events;
		237	}
		238
179	static void	239	static void
180	queue_events (W *events, int eventcnt, int type)	240	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	241	{
182	int i;	242	int i;
183		243
184	for (i = 0; i < eventcnt; ++i)	244	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	245	event (EV_A_ events [i], type);
186	}	246	}
187		247
188	static void	248	static void
189	fd_event (int fd, int events)	249	fd_event (EV_P_ int fd, int events)
190	{	250	{
191	ANFD *anfd = anfds + fd;	251	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	252	struct ev_io *w;
193		253
194	for (w = anfd->head; w; w = w->next)	254	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
195	{	255	{
196	int ev = w->events & events;	256	int ev = w->events & events;
197		257
198	if (ev)	258	if (ev)
199	event ((W)w, ev);	259	event (EV_A_ (W)w, ev);
200	}	260	}
201	}	261	}
202		262
203	/*****************************************************************************/	263	/*****************************************************************************/
204		264
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	265	static void
209	fd_reify (void)	266	fd_reify (EV_P)
210	{	267	{
211	int i;	268	int i;
212		269
213	for (i = 0; i < fdchangecnt; ++i)	270	for (i = 0; i < fdchangecnt; ++i)
214	{	271	{
…		…
216	ANFD *anfd = anfds + fd;	273	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	274	struct ev_io *w;
218		275
219	int events = 0;	276	int events = 0;
220		277
221	for (w = anfd->head; w; w = w->next)	278	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
222	events \|= w->events;	279	events \|= w->events;
223		280
224	anfd->events &= ~EV_REIFY;	281	anfd->reify = 0;
225		282
226	if (anfd->events != events)	283	if (anfd->events != events)
227	{	284	{
228	method_modify (fd, anfd->events, events);	285	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	286	anfd->events = events;
230	}	287	}
231	}	288	}
232		289
233	fdchangecnt = 0;	290	fdchangecnt = 0;
234	}	291	}
235		292
236	static void	293	static void
237	fd_change (int fd)	294	fd_change (EV_P_ int fd)
238	{	295	{
239	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	296	if (anfds [fd].reify \|\| fdchangecnt < 0)
240	return;	297	return;
241		298
242	anfds [fd].events \|= EV_REIFY;	299	anfds [fd].reify = 1;
243		300
244	++fdchangecnt;	301	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	302	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
246	fdchanges [fdchangecnt - 1] = fd;	303	fdchanges [fdchangecnt - 1] = fd;
247	}	304	}
248		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
249	/* called on EBADF to verify fds */	318	/* called on EBADF to verify fds */
250	static void	319	static void
251	fd_recheck (void)	320	fd_ebadf (EV_P)
252	{	321	{
253	int fd;	322	int fd;
254		323
255	for (fd = 0; fd < anfdmax; ++fd)	324	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	325	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	326	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
258	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)
259	{	338	{
260	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	339	close (fd);
261	ev_io_stop (anfds [fd].head);	340	fd_kill (EV_A_ fd);
		341	return;
262	}	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	}
263	}	358	}
264		359
265	/*****************************************************************************/	360	/*****************************************************************************/
266		361
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	362	static void
274	upheap (WT *timers, int k)	363	upheap (WT *heap, int k)
275	{	364	{
276	WT w = timers [k];	365	WT w = heap [k];
277		366
278	while (k && timers [k >> 1]->at > w->at)	367	while (k && heap [k >> 1]->at > w->at)
279	{	368	{
280	timers [k] = timers [k >> 1];	369	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	370	heap [k]->active = k + 1;
282	k >>= 1;	371	k >>= 1;
283	}	372	}
284		373
285	timers [k] = w;	374	heap [k] = w;
286	timers [k]->active = k + 1;	375	heap [k]->active = k + 1;
287		376
288	}	377	}
289		378
290	static void	379	static void
291	downheap (WT *timers, int N, int k)	380	downheap (WT *heap, int N, int k)
292	{	381	{
293	WT w = timers [k];	382	WT w = heap [k];
294		383
295	while (k < (N >> 1))	384	while (k < (N >> 1))
296	{	385	{
297	int j = k << 1;	386	int j = k << 1;
298		387
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	388	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	389	++j;
301		390
302	if (w->at <= timers [j]->at)	391	if (w->at <= heap [j]->at)
303	break;	392	break;
304		393
305	timers [k] = timers [j];	394	heap [k] = heap [j];
306	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
307	k = j;	396	k = j;
308	}	397	}
309		398
310	timers [k] = w;	399	heap [k] = w;
311	timers [k]->active = k + 1;	400	heap [k]->active = k + 1;
312	}	401	}
313		402
314	/*****************************************************************************/	403	/*****************************************************************************/
315		404
316	typedef struct	405	typedef struct
317	{	406	{
318	struct ev_signal *head;	407	struct ev_watcher_list *head;
319	sig_atomic_t gotsig;	408	sig_atomic_t volatile gotsig;
320	} ANSIG;	409	} ANSIG;
321		410
322	static ANSIG *signals;	411	static ANSIG *signals;
323	static int signalmax;	412	static int signalmax;
324		413
325	static int sigpipe [2];	414	static int sigpipe [2];
326	static sig_atomic_t gotsig;	415	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;
328		416
329	static void	417	static void
330	signals_init (ANSIG *base, int count)	418	signals_init (ANSIG *base, int count)
331	{	419	{
332	while (count--)	420	while (count--)
333	{	421	{
334	base->head = 0;	422	base->head = 0;
335	base->gotsig = 0;	423	base->gotsig = 0;
		424
336	++base;	425	++base;
337	}	426	}
338	}	427	}
339		428
340	static void	429	static void
…		…
342	{	431	{
343	signals [signum - 1].gotsig = 1;	432	signals [signum - 1].gotsig = 1;
344		433
345	if (!gotsig)	434	if (!gotsig)
346	{	435	{
		436	int old_errno = errno;
347	gotsig = 1;	437	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	438	write (sigpipe [1], &signum, 1);
		439	errno = old_errno;
349	}	440	}
350	}	441	}
351		442
352	static void	443	static void
353	sigcb (struct ev_io *iow, int revents)	444	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	445	{
355	struct ev_signal *w;	446	struct ev_watcher_list *w;
356	int sig;	447	int signum;
357		448
		449	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	450	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		451
361	for (sig = signalmax; sig--; )	452	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	453	if (signals [signum].gotsig)
363	{	454	{
364	signals [sig].gotsig = 0;	455	signals [signum].gotsig = 0;
365		456
366	for (w = signals [sig].head; w; w = w->next)	457	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	458	event (EV_A_ (W)w, EV_SIGNAL);
368	}	459	}
369	}	460	}
370		461
371	static void	462	static void
372	siginit (void)	463	siginit (EV_P)
373	{	464	{
		465	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	467	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		468
377	/* rather than sort out wether we really need nb, set it */	469	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	471	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		472	#endif
380		473
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	474	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	475	ev_io_start (EV_A_ &sigev);
		476	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	477	}
384		478
385	/*****************************************************************************/	479	/*****************************************************************************/
386		480
387	static struct ev_idle **idles;	481	#ifndef WIN32
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397
398	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;
400		482
401	#ifndef WCONTINUED	483	#ifndef WCONTINUED
402	# define WCONTINUED 0	484	# define WCONTINUED 0
403	#endif	485	#endif
404		486
405	static void	487	static void
406	childcb (struct ev_signal *sw, int revents)	488	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	489	{
408	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	{
409	int pid, status;	505	int pid, status;
410		506
411	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	507	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	508	{
413	if (w->pid == pid \|\| w->pid == -1)	509	/* make sure we are called again until all childs have been reaped */
414	{	510	event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	511
416	event ((W)w, EV_CHILD);	512	child_reap (EV_A_ sw, pid, pid, status);
417	}	513	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		514	}
418	}	515	}
		516
		517	#endif
419		518
420	/*****************************************************************************/	519	/*****************************************************************************/
421		520
		521	#if EV_USE_KQUEUE
		522	# include "ev_kqueue.c"
		523	#endif
422	#if EV_USE_EPOLL	524	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	525	# include "ev_epoll.c"
424	#endif	526	#endif
		527	#if EV_USEV_POLL
		528	# include "ev_poll.c"
		529	#endif
425	#if EV_USE_SELECT	530	#if EV_USE_SELECT
426	# include "ev_select.c"	531	# include "ev_select.c"
427	#endif	532	#endif
428		533
429	int	534	int
…		…
436	ev_version_minor (void)	541	ev_version_minor (void)
437	{	542	{
438	return EV_VERSION_MINOR;	543	return EV_VERSION_MINOR;
439	}	544	}
440		545
441	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)
442	{	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	{
443	if (!ev_method)	567	if (!method)
444	{	568	{
445	#if EV_USE_MONOTONIC	569	#if EV_USE_MONOTONIC
446	{	570	{
447	struct timespec ts;	571	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	572	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	573	have_monotonic = 1;
450	}	574	}
451	#endif	575	#endif
452		576
453	ev_now = ev_time ();	577	rt_now = ev_time ();
454	now = get_clock ();	578	mn_now = get_clock ();
		579	now_floor = mn_now;
455	diff = ev_now - now;	580	rtmn_diff = rt_now - mn_now;
456		581
457	if (pipe (sigpipe))	582	if (methods == EVMETHOD_AUTO)
458	return 0;	583	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		584	methods = atoi (getenv ("LIBEV_METHODS"));
		585	else
460	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
461	#if EV_USE_EPOLL	592	#if EV_USE_EPOLL
462	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);
463	#endif	597	#endif
464	#if EV_USE_SELECT	598	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	599	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	600	#endif
		601	}
		602	}
467		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
468	if (ev_method)	691	if (ev_method (EV_A))
469	{	692	{
470	ev_watcher_init (&sigev, sigcb);	693	ev_watcher_init (&sigev, sigcb);
		694	ev_set_priority (&sigev, EV_MAXPRI);
471	siginit ();	695	siginit (EV_A);
472		696
		697	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	698	ev_signal_init (&childev, childcb, SIGCHLD);
		699	ev_set_priority (&childev, EV_MAXPRI);
474	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
475	}	703	}
		704	else
		705	default_loop = 0;
476	}	706	}
477		707
478	return ev_method;	708	return default_loop;
479	}	709	}
480		710
481	/*****************************************************************************/
482
483	void	711	void
484	ev_prefork (void)	712	ev_default_destroy (void)
485	{	713	{
486	/* nop */	714	#if EV_MULTIPLICITY
487	}	715	struct ev_loop *loop = default_loop;
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif	716	#endif
502		717
		718	ev_ref (EV_A); /* child watcher */
		719	ev_signal_stop (EV_A_ &childev);
		720
		721	ev_ref (EV_A); /* signal watcher */
503	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);
504	close (sigpipe [0]);	736	close (sigpipe [0]);
505	close (sigpipe [1]);	737	close (sigpipe [1]);
506	pipe (sigpipe);	738	pipe (sigpipe);
		739
		740	ev_ref (EV_A); /* signal watcher */
507	siginit ();	741	siginit (EV_A);
508	}	742	}
509		743
510	/*****************************************************************************/	744	/*****************************************************************************/
511		745
512	static void	746	static void
513	call_pending (void)	747	call_pending (EV_P)
514	{	748	{
		749	int pri;
		750
		751	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	752	while (pendingcnt [pri])
516	{	753	{
517	ANPENDING *p = pendings + --pendingcnt;	754	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		755
519	if (p->w)	756	if (p->w)
520	{	757	{
521	p->w->pending = 0;	758	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	759	p->w->cb (EV_A_ p->w, p->events);
523	}	760	}
524	}	761	}
525	}	762	}
526		763
527	static void	764	static void
528	timers_reify (void)	765	timers_reify (EV_P)
529	{	766	{
530	while (timercnt && timers [0]->at <= now)	767	while (timercnt && timers [0]->at <= mn_now)
531	{	768	{
532	struct ev_timer *w = timers [0];	769	struct ev_timer *w = timers [0];
533
534	event ((W)w, EV_TIMEOUT);
535		770
536	/* first reschedule or stop timer */	771	/* first reschedule or stop timer */
537	if (w->repeat)	772	if (w->repeat)
538	{	773	{
		774	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
539	w->at = now + w->repeat;	775	w->at = mn_now + w->repeat;
540	assert (("timer timeout in the past, negative repeat?", w->at > now));
541	downheap ((WT *)timers, timercnt, 0);	776	downheap ((WT *)timers, timercnt, 0);
542	}	777	}
543	else	778	else
544	ev_timer_stop (w); /* nonrepeating: stop timer */	779	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545	}
546	}
547		780
		781	event (EV_A_ (W)w, EV_TIMEOUT);
		782	}
		783	}
		784
548	static void	785	static void
549	periodics_reify (void)	786	periodics_reify (EV_P)
550	{	787	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	788	while (periodiccnt && periodics [0]->at <= rt_now)
552	{	789	{
553	struct ev_periodic *w = periodics [0];	790	struct ev_periodic *w = periodics [0];
554		791
555	/* first reschedule or stop timer */	792	/* first reschedule or stop timer */
556	if (w->interval)	793	if (w->interval)
557	{	794	{
558	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;
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	796	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	797	downheap ((WT *)periodics, periodiccnt, 0);
561	}	798	}
562	else	799	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	800	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		801
565	event ((W)w, EV_TIMEOUT);	802	event (EV_A_ (W)w, EV_PERIODIC);
566	}	803	}
567	}	804	}
568		805
569	static void	806	static void
570	periodics_reschedule (ev_tstamp diff)	807	periodics_reschedule (EV_P)
571	{	808	{
572	int i;	809	int i;
573		810
574	/* adjust periodics after time jump */	811	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	812	for (i = 0; i < periodiccnt; ++i)
576	{	813	{
577	struct ev_periodic *w = periodics [i];	814	struct ev_periodic *w = periodics [i];
578		815
579	if (w->interval)	816	if (w->interval)
580	{	817	{
581	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;
582		819
583	if (fabs (diff) >= 1e-4)	820	if (fabs (diff) >= 1e-4)
584	{	821	{
585	ev_periodic_stop (w);	822	ev_periodic_stop (EV_A_ w);
586	ev_periodic_start (w);	823	ev_periodic_start (EV_A_ w);
587		824
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	825	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	826	}
590	}	827	}
591	}	828	}
592	}	829	}
593		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
594	static void	849	static void
595	time_update (void)	850	time_update (EV_P)
596	{	851	{
597	int i;	852	int i;
598		853
599	ev_now = ev_time ();	854	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	855	if (expect_true (have_monotonic))
602	{	856	{
603	ev_tstamp odiff = diff;	857	if (time_update_monotonic (EV_A))
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	858	{
607	now = get_clock ();	859	ev_tstamp odiff = rtmn_diff;
		860
		861	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		862	{
608	diff = ev_now - now;	863	rtmn_diff = rt_now - mn_now;
609		864
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	865	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	866	return; /* all is well */
612		867
613	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) */
614	}	876	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}	877	}
619	else	878	else
		879	#endif
620	{	880	{
621	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))
622	{	884	{
623	periodics_reschedule (ev_now - now);	885	periodics_reschedule (EV_A);
624		886
625	/* 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 */
626	for (i = 0; i < timercnt; ++i)	888	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	889	timers [i]->at += rt_now - mn_now;
628	}	890	}
629		891
630	now = ev_now;	892	mn_now = rt_now;
631	}	893	}
632	}	894	}
633		895
634	int ev_loop_done;	896	void
		897	ev_ref (EV_P)
		898	{
		899	++activecnt;
		900	}
635		901
		902	void
		903	ev_unref (EV_P)
		904	{
		905	--activecnt;
		906	}
		907
		908	static int loop_done;
		909
		910	void
636	void ev_loop (int flags)	911	ev_loop (EV_P_ int flags)
637	{	912	{
638	double block;	913	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	914	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
640		915
641	do	916	do
642	{	917	{
643	/* queue check watchers (and execute them) */	918	/* queue check watchers (and execute them) */
644	if (preparecnt)	919	if (expect_false (preparecnt))
645	{	920	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	921	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	922	call_pending (EV_A);
648	}	923	}
649		924
650	/* update fd-related kernel structures */	925	/* update fd-related kernel structures */
651	fd_reify ();	926	fd_reify (EV_A);
652		927
653	/* calculate blocking time */	928	/* calculate blocking time */
654		929
655	/* 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
656	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	{
657	ev_now = ev_time ();	938	rt_now = ev_time ();
		939	mn_now = rt_now;
		940	}
658		941
659	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	942	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
660	block = 0.;	943	block = 0.;
661	else	944	else
662	{	945	{
663	block = MAX_BLOCKTIME;	946	block = MAX_BLOCKTIME;
664		947
665	if (timercnt)	948	if (timercnt)
666	{	949	{
667	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;
668	if (block > to) block = to;	951	if (block > to) block = to;
669	}	952	}
670		953
671	if (periodiccnt)	954	if (periodiccnt)
672	{	955	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	956	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
674	if (block > to) block = to;	957	if (block > to) block = to;
675	}	958	}
676		959
677	if (block < 0.) block = 0.;	960	if (block < 0.) block = 0.;
678	}	961	}
679		962
680	method_poll (block);	963	method_poll (EV_A_ block);
681		964
682	/* update ev_now, do magic */	965	/* update rt_now, do magic */
683	time_update ();	966	time_update (EV_A);
684		967
685	/* queue pending timers and reschedule them */	968	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	969	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	970	periodics_reify (EV_A); /* absolute timers called first */
688		971
689	/* queue idle watchers unless io or timers are pending */	972	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	973	if (!pendingcnt)
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	974	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		975
693	/* queue check watchers, to be executed first */	976	/* queue check watchers, to be executed first */
694	if (checkcnt)	977	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	978	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		979
697	call_pending ();	980	call_pending (EV_A);
698	}	981	}
699	while (!ev_loop_done);	982	while (activecnt && !loop_done);
700		983
701	if (ev_loop_done != 2)	984	if (loop_done != 2)
702	ev_loop_done = 0;	985	loop_done = 0;
		986	}
		987
		988	void
		989	ev_unloop (EV_P_ int how)
		990	{
		991	loop_done = how;
703	}	992	}
704		993
705	/*****************************************************************************/	994	/*****************************************************************************/
706		995
707	static void	996	inline void
708	wlist_add (WL *head, WL elem)	997	wlist_add (WL *head, WL elem)
709	{	998	{
710	elem->next = *head;	999	elem->next = *head;
711	*head = elem;	1000	*head = elem;
712	}	1001	}
713		1002
714	static void	1003	inline void
715	wlist_del (WL *head, WL elem)	1004	wlist_del (WL *head, WL elem)
716	{	1005	{
717	while (*head)	1006	while (*head)
718	{	1007	{
719	if (*head == elem)	1008	if (*head == elem)
…		…
724		1013
725	head = &(*head)->next;	1014	head = &(*head)->next;
726	}	1015	}
727	}	1016	}
728		1017
729	static void	1018	inline void
730	ev_clear (W w)	1019	ev_clear_pending (EV_P_ W w)
731	{	1020	{
732	if (w->pending)	1021	if (w->pending)
733	{	1022	{
734	pendings [w->pending - 1].w = 0;	1023	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1024	w->pending = 0;
736	}	1025	}
737	}	1026	}
738		1027
739	static void	1028	inline void
740	ev_start (W w, int active)	1029	ev_start (EV_P_ W w, int active)
741	{	1030	{
		1031	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1032	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1033
742	w->active = active;	1034	w->active = active;
		1035	ev_ref (EV_A);
743	}	1036	}
744		1037
745	static void	1038	inline void
746	ev_stop (W w)	1039	ev_stop (EV_P_ W w)
747	{	1040	{
		1041	ev_unref (EV_A);
748	w->active = 0;	1042	w->active = 0;
749	}	1043	}
750		1044
751	/*****************************************************************************/	1045	/*****************************************************************************/
752		1046
753	void	1047	void
754	ev_io_start (struct ev_io *w)	1048	ev_io_start (EV_P_ struct ev_io *w)
755	{	1049	{
		1050	int fd = w->fd;
		1051
756	if (ev_is_active (w))	1052	if (ev_is_active (w))
757	return;	1053	return;
758		1054
759	int fd = w->fd;	1055	assert (("ev_io_start called with negative fd", fd >= 0));
760		1056
761	ev_start ((W)w, 1);	1057	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1058	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1059	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1060
765	fd_change (fd);	1061	fd_change (EV_A_ fd);
766	}	1062	}
767		1063
768	void	1064	void
769	ev_io_stop (struct ev_io *w)	1065	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1066	{
771	ev_clear ((W)w);	1067	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1068	if (!ev_is_active (w))
773	return;	1069	return;
774		1070
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1071	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1072	ev_stop (EV_A_ (W)w);
777		1073
778	fd_change (w->fd);	1074	fd_change (EV_A_ w->fd);
779	}	1075	}
780		1076
781	void	1077	void
782	ev_timer_start (struct ev_timer *w)	1078	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1079	{
784	if (ev_is_active (w))	1080	if (ev_is_active (w))
785	return;	1081	return;
786		1082
787	w->at += now;	1083	w->at += mn_now;
788		1084
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1085	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1086
791	ev_start ((W)w, ++timercnt);	1087	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1088	array_needsize (timers, timermax, timercnt, );
793	timers [timercnt - 1] = w;	1089	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1090	upheap ((WT *)timers, timercnt - 1);
795	}	1091	}
796		1092
797	void	1093	void
798	ev_timer_stop (struct ev_timer *w)	1094	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1095	{
800	ev_clear ((W)w);	1096	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1097	if (!ev_is_active (w))
802	return;	1098	return;
803		1099
804	if (w->active < timercnt--)	1100	if (w->active < timercnt--)
805	{	1101	{
…		…
807	downheap ((WT *)timers, timercnt, w->active - 1);	1103	downheap ((WT *)timers, timercnt, w->active - 1);
808	}	1104	}
809		1105
810	w->at = w->repeat;	1106	w->at = w->repeat;
811		1107
812	ev_stop ((W)w);	1108	ev_stop (EV_A_ (W)w);
813	}	1109	}
814		1110
815	void	1111	void
816	ev_timer_again (struct ev_timer *w)	1112	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1113	{
818	if (ev_is_active (w))	1114	if (ev_is_active (w))
819	{	1115	{
820	if (w->repeat)	1116	if (w->repeat)
821	{	1117	{
822	w->at = now + w->repeat;	1118	w->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1119	downheap ((WT *)timers, timercnt, w->active - 1);
824	}	1120	}
825	else	1121	else
826	ev_timer_stop (w);	1122	ev_timer_stop (EV_A_ w);
827	}	1123	}
828	else if (w->repeat)	1124	else if (w->repeat)
829	ev_timer_start (w);	1125	ev_timer_start (EV_A_ w);
830	}	1126	}
831		1127
832	void	1128	void
833	ev_periodic_start (struct ev_periodic *w)	1129	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1130	{
835	if (ev_is_active (w))	1131	if (ev_is_active (w))
836	return;	1132	return;
837		1133
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1134	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
839		1135
840	/* 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 */
841	if (w->interval)	1137	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1138	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
843		1139
844	ev_start ((W)w, ++periodiccnt);	1140	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1141	array_needsize (periodics, periodicmax, periodiccnt, );
846	periodics [periodiccnt - 1] = w;	1142	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1143	upheap ((WT *)periodics, periodiccnt - 1);
848	}	1144	}
849		1145
850	void	1146	void
851	ev_periodic_stop (struct ev_periodic *w)	1147	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1148	{
853	ev_clear ((W)w);	1149	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1150	if (!ev_is_active (w))
855	return;	1151	return;
856		1152
857	if (w->active < periodiccnt--)	1153	if (w->active < periodiccnt--)
858	{	1154	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1155	periodics [w->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1156	downheap ((WT *)periodics, periodiccnt, w->active - 1);
861	}	1157	}
862		1158
863	ev_stop ((W)w);	1159	ev_stop (EV_A_ (W)w);
864	}	1160	}
865		1161
866	void	1162	void
867	ev_signal_start (struct ev_signal *w)	1163	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1164	{
869	if (ev_is_active (w))	1165	if (ev_is_active (w))
870	return;	1166	return;
871		1167
		1168	ev_start (EV_A_ (W)w, ++idlecnt);
		1169	array_needsize (idles, idlemax, idlecnt, );
		1170	idles [idlecnt - 1] = w;
		1171	}
		1172
		1173	void
		1174	ev_idle_stop (EV_P_ struct ev_idle *w)
		1175	{
		1176	ev_clear_pending (EV_A_ (W)w);
		1177	if (ev_is_active (w))
		1178	return;
		1179
		1180	idles [w->active - 1] = idles [--idlecnt];
		1181	ev_stop (EV_A_ (W)w);
		1182	}
		1183
		1184	void
		1185	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1186	{
		1187	if (ev_is_active (w))
		1188	return;
		1189
		1190	ev_start (EV_A_ (W)w, ++preparecnt);
		1191	array_needsize (prepares, preparemax, preparecnt, );
		1192	prepares [preparecnt - 1] = w;
		1193	}
		1194
		1195	void
		1196	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1197	{
		1198	ev_clear_pending (EV_A_ (W)w);
		1199	if (ev_is_active (w))
		1200	return;
		1201
		1202	prepares [w->active - 1] = prepares [--preparecnt];
		1203	ev_stop (EV_A_ (W)w);
		1204	}
		1205
		1206	void
		1207	ev_check_start (EV_P_ struct ev_check *w)
		1208	{
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	ev_start (EV_A_ (W)w, ++checkcnt);
		1213	array_needsize (checks, checkmax, checkcnt, );
		1214	checks [checkcnt - 1] = w;
		1215	}
		1216
		1217	void
		1218	ev_check_stop (EV_P_ struct ev_check *w)
		1219	{
		1220	ev_clear_pending (EV_A_ (W)w);
		1221	if (ev_is_active (w))
		1222	return;
		1223
		1224	checks [w->active - 1] = checks [--checkcnt];
		1225	ev_stop (EV_A_ (W)w);
		1226	}
		1227
		1228	#ifndef SA_RESTART
		1229	# define SA_RESTART 0
		1230	#endif
		1231
		1232	void
		1233	ev_signal_start (EV_P_ struct ev_signal *w)
		1234	{
		1235	#if EV_MULTIPLICITY
		1236	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1237	#endif
		1238	if (ev_is_active (w))
		1239	return;
		1240
		1241	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1242
872	ev_start ((W)w, 1);	1243	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1244	array_needsize (signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1245	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1246
876	if (!w->next)	1247	if (!w->next)
877	{	1248	{
878	struct sigaction sa;	1249	struct sigaction sa;
879	sa.sa_handler = sighandler;	1250	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1251	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1252	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1253	sigaction (w->signum, &sa, 0);
883	}	1254	}
884	}	1255	}
885		1256
886	void	1257	void
887	ev_signal_stop (struct ev_signal *w)	1258	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1259	{
889	ev_clear ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
891	return;	1262	return;
892		1263
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1264	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1265	ev_stop (EV_A_ (W)w);
895		1266
896	if (!signals [w->signum - 1].head)	1267	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1268	signal (w->signum, SIG_DFL);
898	}	1269	}
899		1270
900	void	1271	void
901	ev_idle_start (struct ev_idle *w)	1272	ev_child_start (EV_P_ struct ev_child *w)
902	{	1273	{
		1274	#if EV_MULTIPLICITY
		1275	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1276	#endif
903	if (ev_is_active (w))	1277	if (ev_is_active (w))
904	return;	1278	return;
905		1279
906	ev_start ((W)w, ++idlecnt);	1280	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1281	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1282	}
910		1283
911	void	1284	void
912	ev_idle_stop (struct ev_idle *w)	1285	ev_child_stop (EV_P_ struct ev_child *w)
913	{	1286	{
914	ev_clear ((W)w);	1287	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1288	if (ev_is_active (w))
916	return;	1289	return;
917		1290
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)
968	{
969	if (ev_is_active (w))
970	return;
971
972	ev_start ((W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}
975
976	void
977	ev_child_stop (struct ev_child *w)
978	{
979	ev_clear ((W)w);
980	if (ev_is_active (w))
981	return;
982
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1291	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1292	ev_stop (EV_A_ (W)w);
985	}	1293	}
986		1294
987	/*****************************************************************************/	1295	/*****************************************************************************/
988		1296
989	struct ev_once	1297	struct ev_once
…		…
993	void (cb)(int revents, void arg);	1301	void (cb)(int revents, void arg);
994	void *arg;	1302	void *arg;
995	};	1303	};
996		1304
997	static void	1305	static void
998	once_cb (struct ev_once *once, int revents)	1306	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1307	{
1000	void (cb)(int revents, void arg) = once->cb;	1308	void (cb)(int revents, void arg) = once->cb;
1001	void *arg = once->arg;	1309	void *arg = once->arg;
1002		1310
1003	ev_io_stop (&once->io);	1311	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1312	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1313	free (once);
1006		1314
1007	cb (revents, arg);	1315	cb (revents, arg);
1008	}	1316	}
1009		1317
1010	static void	1318	static void
1011	once_cb_io (struct ev_io *w, int revents)	1319	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1320	{
1013	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);
1014	}	1322	}
1015		1323
1016	static void	1324	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1325	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1326	{
1019	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);
1020	}	1328	}
1021		1329
1022	void	1330	void
1023	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)
1024	{	1332	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1333	struct ev_once *once = malloc (sizeof (struct ev_once));
1026		1334
1027	if (!once)	1335	if (!once)
1028	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1336	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1033		1341
1034	ev_watcher_init (&once->io, once_cb_io);	1342	ev_watcher_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1343	if (fd >= 0)
1036	{	1344	{
1037	ev_io_set (&once->io, fd, events);	1345	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1346	ev_io_start (EV_A_ &once->io);
1039	}	1347	}
1040		1348
1041	ev_watcher_init (&once->to, once_cb_to);	1349	ev_watcher_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1350	if (timeout >= 0.)
1043	{	1351	{
1044	ev_timer_set (&once->to, timeout, 0.);	1352	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1353	ev_timer_start (EV_A_ &once->to);
1046	}	1354	}
1047	}	1355	}
1048	}	1356	}
1049		1357
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}
1127
1128	#endif
1129
1130
1131
1132

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Comparing libev/ev.c (file contents): Revision 1.29 by root, Thu Nov 1 08:10:03 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 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.58 by root, Sun Nov 4 16:52:52 2007 UTC