[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 1.61 by root, Sun Nov 4 19:45:09 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"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>	59	#include <unistd.h>
…		…
40	#include <stdio.h>	64	#include <stdio.h>
41		65
42	#include <assert.h>	66	#include <assert.h>
43	#include <errno.h>	67	#include <errno.h>
44	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
45	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
46	#include <sys/time.h>	72	#include <sys/time.h>
47	#include <time.h>	73	#include <time.h>
48		74
		75	/**/
		76
49	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	79	#endif
54		80
55	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
57	#endif	83	#endif
58		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
59	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
61	#endif	91	#endif
62		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_REALTIME
		98	# define EV_USE_REALTIME 1
		99	#endif
		100
		101	/**/
		102
		103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
		105	# define EV_USE_MONOTONIC 0
		106	#endif
		107
63	#ifndef CLOCK_REALTIME	108	#ifndef CLOCK_REALTIME
		109	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	110	# define EV_USE_REALTIME 0
65	#endif	111	#endif
66	#ifndef EV_USE_REALTIME	112
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	113	/**/
68	#endif
69		114
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#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) */	116	#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 */	117	#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 */	118	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
74		119
75	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		135
77	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
80		139
81	static ev_tstamp now, diff; /* monotonic clock */	140	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		141
91	/*****************************************************************************/	142	/*****************************************************************************/
92		143
93	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
94	ev_time (void)	178	ev_time (void)
95	{	179	{
96	#if EV_USE_REALTIME	180	#if EV_USE_REALTIME
97	struct timespec ts;	181	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	188	#endif
105	}	189	}
106		190
107	static ev_tstamp	191	inline ev_tstamp
108	get_clock (void)	192	get_clock (void)
109	{	193	{
110	#if EV_USE_MONOTONIC	194	#if EV_USE_MONOTONIC
111	if (have_monotonic)	195	if (expect_true (have_monotonic))
112	{	196	{
113	struct timespec ts;	197	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	200	}
117	#endif	201	#endif
118		202
119	return ev_time ();	203	return ev_time ();
120	}	204	}
121		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	212	#define array_roundsize(base,n) ((n) \| 4 & ~3)
123		213
124	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
126	{ \	216	{ \
127	int newcnt = cur; \	217	int newcnt = cur; \
128	do \	218	do \
129	{ \	219	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	220	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	226	cur = newcnt; \
137	}	227	}
138		228
139	/*****************************************************************************/	229	/*****************************************************************************/
140		230
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	231	static void
151	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
152	{	233	{
153	while (count--)	234	while (count--)
154	{	235	{
155	base->head = 0;	236	base->head = 0;
156	base->events = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
157	++base;	240	++base;
158	}	241	}
159	}	242	}
160		243
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	244	static void
171	event (W w, int events)	245	event (EV_P_ W w, int events)
172	{	246	{
173	if (w->pending)	247	if (w->pending)
174	{	248	{
175	pendings [w->pending - 1].events \|= events;	249	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
176	return;	250	return;
177	}	251	}
178		252
179	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
180	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
181	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
182	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
183	}	257	}
184		258
185	static void	259	static void
186	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
187	{	261	{
188	int i;	262	int i;
189		263
190	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);	265	event (EV_A_ events [i], type);
192	}	266	}
193		267
194	static void	268	static void
195	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
196	{	270	{
197	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
198	struct ev_io *w;	272	struct ev_io *w;
199		273
200	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
201	{	275	{
202	int ev = w->events & events;	276	int ev = w->events & events;
203		277
204	if (ev)	278	if (ev)
205	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
206	}	280	}
207	}	281	}
208		282
209	/*****************************************************************************/	283	/*****************************************************************************/
210		284
211	static int *fdchanges;
212	static int fdchangemax, fdchangecnt;
213
214	static void	285	static void
215	fd_reify (void)	286	fd_reify (EV_P)
216	{	287	{
217	int i;	288	int i;
218		289
219	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
220	{	291	{
…		…
222	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
223	struct ev_io *w;	294	struct ev_io *w;
224		295
225	int events = 0;	296	int events = 0;
226		297
227	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
228	events \|= w->events;	299	events \|= w->events;
229		300
230	anfd->events &= ~EV_REIFY;	301	anfd->reify = 0;
231		302
232	if (anfd->events != events)	303	if (anfd->events != events)
233	{	304	{
234	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
235	anfd->events = events;	306	anfd->events = events;
236	}	307	}
237	}	308	}
238		309
239	fdchangecnt = 0;	310	fdchangecnt = 0;
240	}	311	}
241		312
242	static void	313	static void
243	fd_change (int fd)	314	fd_change (EV_P_ int fd)
244	{	315	{
245	if (anfds [fd].events & EV_REIFY \|\| fdchangecnt < 0)	316	if (anfds [fd].reify \|\| fdchangecnt < 0)
246	return;	317	return;
247		318
248	anfds [fd].events \|= EV_REIFY;	319	anfds [fd].reify = 1;
249		320
250	++fdchangecnt;	321	++fdchangecnt;
251	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
252	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
253	}	324	}
254		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		335	}
		336	}
		337
255	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
256	static void	339	static void
257	fd_recheck (void)	340	fd_ebadf (EV_P)
258	{	341	{
259	int fd;	342	int fd;
260		343
261	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
262	if (anfds [fd].events)	345	if (anfds [fd].events)
263	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
264	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
265	{	358	{
266	ev_io_stop (anfds [fd].head);	359	close (fd);
267	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT);	360	fd_kill (EV_A_ fd);
		361	return;
268	}	362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
269	}	378	}
270		379
271	/*****************************************************************************/	380	/*****************************************************************************/
272		381
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	382	static void
280	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
281	{	384	{
282	WT w = timers [k];	385	WT w = heap [k];
283		386
284	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
285	{	388	{
286	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
287	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
288	k >>= 1;	391	k >>= 1;
289	}	392	}
290		393
291	timers [k] = w;	394	heap [k] = w;
292	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
293		396
294	}	397	}
295		398
296	static void	399	static void
297	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
298	{	401	{
299	WT w = timers [k];	402	WT w = heap [k];
300		403
301	while (k < (N >> 1))	404	while (k < (N >> 1))
302	{	405	{
303	int j = k << 1;	406	int j = k << 1;
304		407
305	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
306	++j;	409	++j;
307		410
308	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
309	break;	412	break;
310		413
311	timers [k] = timers [j];	414	heap [k] = heap [j];
312	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
313	k = j;	416	k = j;
314	}	417	}
315		418
316	timers [k] = w;	419	heap [k] = w;
317	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
318	}	421	}
319		422
320	/*****************************************************************************/	423	/*****************************************************************************/
321		424
322	typedef struct	425	typedef struct
323	{	426	{
324	struct ev_signal *head;	427	struct ev_watcher_list *head;
325	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
326	} ANSIG;	429	} ANSIG;
327		430
328	static ANSIG *signals;	431	static ANSIG *signals;
329	static int signalmax;	432	static int signalmax;
330		433
331	static int sigpipe [2];	434	static int sigpipe [2];
332	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
333	static struct ev_io sigev;	436	static struct ev_io sigev;
334		437
335	static void	438	static void
336	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
337	{	440	{
338	while (count--)	441	while (count--)
339	{	442	{
340	base->head = 0;	443	base->head = 0;
341	base->gotsig = 0;	444	base->gotsig = 0;
		445
342	++base;	446	++base;
343	}	447	}
344	}	448	}
345		449
346	static void	450	static void
…		…
348	{	452	{
349	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
350		454
351	if (!gotsig)	455	if (!gotsig)
352	{	456	{
		457	int old_errno = errno;
353	gotsig = 1;	458	gotsig = 1;
354	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
355	}	461	}
356	}	462	}
357		463
358	static void	464	static void
359	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
360	{	466	{
361	struct ev_signal *w;	467	struct ev_watcher_list *w;
362	int sig;	468	int signum;
363		469
		470	read (sigpipe [0], &revents, 1);
364	gotsig = 0;	471	gotsig = 0;
365	read (sigpipe [0], &revents, 1);
366		472
367	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
368	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
369	{	475	{
370	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
371		477
372	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
373	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
374	}	480	}
375	}	481	}
376		482
377	static void	483	static void
378	siginit (void)	484	siginit (EV_P)
379	{	485	{
		486	#ifndef WIN32
380	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
381	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
382		489
383	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
384	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
385	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
386		494
387	ev_io_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
388	ev_io_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
389	}	498	}
390		499
391	/*****************************************************************************/	500	/*****************************************************************************/
392		501
393	static struct ev_idle **idles;	502	#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		503
404	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
405	static struct ev_signal childev;	505	static struct ev_signal childev;
406		506
407	#ifndef WCONTINUED	507	#ifndef WCONTINUED
408	# define WCONTINUED 0	508	# define WCONTINUED 0
409	#endif	509	#endif
410		510
411	static void	511	static void
412	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
413	{	513	{
414	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		517	if (w->pid == pid \|\| !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it now */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
415	int pid, status;	529	int pid, status;
416		530
417	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
418	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
419	if (w->pid == pid \|\| w->pid == -1)	533	/* make sure we are called again until all childs have been reaped */
420	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
421	w->status = status;	535
422	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
423	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
424	}	539	}
		540
		541	#endif
425		542
426	/*****************************************************************************/	543	/*****************************************************************************/
427		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
428	#if EV_USE_EPOLL	548	#if EV_USE_EPOLL
429	# include "ev_epoll.c"	549	# include "ev_epoll.c"
430	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
431	#if EV_USE_SELECT	554	#if EV_USE_SELECT
432	# include "ev_select.c"	555	# include "ev_select.c"
433	#endif	556	#endif
434		557
435	int	558	int
…		…
442	ev_version_minor (void)	565	ev_version_minor (void)
443	{	566	{
444	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
445	}	568	}
446		569
447	int ev_init (int flags)	570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
448	{	573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	\|\| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
449	if (!ev_method)	591	if (!method)
450	{	592	{
451	#if EV_USE_MONOTONIC	593	#if EV_USE_MONOTONIC
452	{	594	{
453	struct timespec ts;	595	struct timespec ts;
454	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
455	have_monotonic = 1;	597	have_monotonic = 1;
456	}	598	}
457	#endif	599	#endif
458		600
459	ev_now = ev_time ();	601	rt_now = ev_time ();
460	now = get_clock ();	602	mn_now = get_clock ();
		603	now_floor = mn_now;
461	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
462		605
463	if (pipe (sigpipe))	606	if (methods == EVMETHOD_AUTO)
464	return 0;	607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
465		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
466	ev_method = EVMETHOD_NONE;	610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
467	#if EV_USE_EPOLL	616	#if EV_USE_EPOLL
468	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
469	#endif	621	#endif
470	#if EV_USE_SELECT	622	#if EV_USE_SELECT
471	if (ev_method == EVMETHOD_NONE) select_init (flags);	623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
472	#endif	624	#endif
		625	}
		626	}
473		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/TODO/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/TODO/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
		702	if (pipe (sigpipe))
		703	return 0;
		704
		705	if (!default_loop)
		706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
474	if (ev_method)	715	if (ev_method (EV_A))
475	{	716	{
476	ev_watcher_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
477	siginit ();	719	siginit (EV_A);
478		720
		721	#ifndef WIN32
479	ev_signal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
480	ev_signal_start (&childev);	724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
481	}	727	}
		728	else
		729	default_loop = 0;
482	}	730	}
483		731
484	return ev_method;	732	return default_loop;
485	}	733	}
486		734
487	/*****************************************************************************/
488
489	void	735	void
490	ev_prefork (void)	736	ev_default_destroy (void)
491	{	737	{
492	/* nop */	738	#if EV_MULTIPLICITY
493	}	739	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	740	#endif
508		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
509	ev_io_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
510	close (sigpipe [0]);	764	close (sigpipe [0]);
511	close (sigpipe [1]);	765	close (sigpipe [1]);
512	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
513	siginit ();	769	siginit (EV_A);
514	}	770	}
515		771
516	/*****************************************************************************/	772	/*****************************************************************************/
517		773
518	static void	774	static void
519	call_pending (void)	775	call_pending (EV_P)
520	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
521	while (pendingcnt)	780	while (pendingcnt [pri])
522	{	781	{
523	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
524		783
525	if (p->w)	784	if (p->w)
526	{	785	{
527	p->w->pending = 0;	786	p->w->pending = 0;
528	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
529	}	788	}
530	}	789	}
531	}	790	}
532		791
533	static void	792	static void
534	timers_reify (void)	793	timers_reify (EV_P)
535	{	794	{
536	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
537	{	796	{
538	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
		798
		799	assert (("inactive timer on timer heap detected", ev_is_active (w)));
539		800
540	/* first reschedule or stop timer */	801	/* first reschedule or stop timer */
541	if (w->repeat)	802	if (w->repeat)
542	{	803	{
		804	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
543	w->at = now + w->repeat;	805	w->at = mn_now + w->repeat;
544	assert (("timer timeout in the past, negative repeat?", w->at > now));
545	downheap ((WT *)timers, timercnt, 0);	806	downheap ((WT *)timers, timercnt, 0);
546	}	807	}
547	else	808	else
548	ev_timer_stop (w); /* nonrepeating: stop timer */	809	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
549		810
550	event ((W)w, EV_TIMEOUT);	811	event (EV_A_ (W)w, EV_TIMEOUT);
551	}	812	}
552	}	813	}
553		814
554	static void	815	static void
555	periodics_reify (void)	816	periodics_reify (EV_P)
556	{	817	{
557	while (periodiccnt && periodics [0]->at <= ev_now)	818	while (periodiccnt && periodics [0]->at <= rt_now)
558	{	819	{
559	struct ev_periodic *w = periodics [0];	820	struct ev_periodic *w = periodics [0];
		821
		822	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
560		823
561	/* first reschedule or stop timer */	824	/* first reschedule or stop timer */
562	if (w->interval)	825	if (w->interval)
563	{	826	{
564	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	827	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));	828	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
566	downheap ((WT *)periodics, periodiccnt, 0);	829	downheap ((WT *)periodics, periodiccnt, 0);
567	}	830	}
568	else	831	else
569	ev_periodic_stop (w); /* nonrepeating: stop timer */	832	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
570		833
571	event ((W)w, EV_TIMEOUT);	834	event (EV_A_ (W)w, EV_PERIODIC);
572	}	835	}
573	}	836	}
574		837
575	static void	838	static void
576	periodics_reschedule (ev_tstamp diff)	839	periodics_reschedule (EV_P)
577	{	840	{
578	int i;	841	int i;
579		842
580	/* adjust periodics after time jump */	843	/* adjust periodics after time jump */
581	for (i = 0; i < periodiccnt; ++i)	844	for (i = 0; i < periodiccnt; ++i)
582	{	845	{
583	struct ev_periodic *w = periodics [i];	846	struct ev_periodic *w = periodics [i];
584		847
585	if (w->interval)	848	if (w->interval)
586	{	849	{
587	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	850	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
588		851
589	if (fabs (diff) >= 1e-4)	852	if (fabs (diff) >= 1e-4)
590	{	853	{
591	ev_periodic_stop (w);	854	ev_periodic_stop (EV_A_ w);
592	ev_periodic_start (w);	855	ev_periodic_start (EV_A_ w);
593		856
594	i = 0; /* restart loop, inefficient, but time jumps should be rare */	857	i = 0; /* restart loop, inefficient, but time jumps should be rare */
595	}	858	}
596	}	859	}
597	}	860	}
598	}	861	}
599		862
		863	inline int
		864	time_update_monotonic (EV_P)
		865	{
		866	mn_now = get_clock ();
		867
		868	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		869	{
		870	rt_now = rtmn_diff + mn_now;
		871	return 0;
		872	}
		873	else
		874	{
		875	now_floor = mn_now;
		876	rt_now = ev_time ();
		877	return 1;
		878	}
		879	}
		880
600	static void	881	static void
601	time_update (void)	882	time_update (EV_P)
602	{	883	{
603	int i;	884	int i;
604		885
605	ev_now = ev_time ();	886	#if EV_USE_MONOTONIC
606
607	if (have_monotonic)	887	if (expect_true (have_monotonic))
608	{	888	{
609	ev_tstamp odiff = diff;	889	if (time_update_monotonic (EV_A))
610
611	for (i = 4; --i; ) /* loop a few times, before making important decisions */
612	{	890	{
613	now = get_clock ();	891	ev_tstamp odiff = rtmn_diff;
		892
		893	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		894	{
614	diff = ev_now - now;	895	rtmn_diff = rt_now - mn_now;
615		896
616	if (fabs (odiff - diff) < MIN_TIMEJUMP)	897	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
617	return; /* all is well */	898	return; /* all is well */
618		899
619	ev_now = ev_time ();	900	rt_now = ev_time ();
		901	mn_now = get_clock ();
		902	now_floor = mn_now;
		903	}
		904
		905	periodics_reschedule (EV_A);
		906	/* no timer adjustment, as the monotonic clock doesn't jump */
		907	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
620	}	908	}
621
622	periodics_reschedule (diff - odiff);
623	/* no timer adjustment, as the monotonic clock doesn't jump */
624	}	909	}
625	else	910	else
		911	#endif
626	{	912	{
627	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	913	rt_now = ev_time ();
		914
		915	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
628	{	916	{
629	periodics_reschedule (ev_now - now);	917	periodics_reschedule (EV_A);
630		918
631	/* adjust timers. this is easy, as the offset is the same for all */	919	/* adjust timers. this is easy, as the offset is the same for all */
632	for (i = 0; i < timercnt; ++i)	920	for (i = 0; i < timercnt; ++i)
633	timers [i]->at += diff;	921	timers [i]->at += rt_now - mn_now;
634	}	922	}
635		923
636	now = ev_now;	924	mn_now = rt_now;
637	}	925	}
638	}	926	}
639		927
640	int ev_loop_done;	928	void
		929	ev_ref (EV_P)
		930	{
		931	++activecnt;
		932	}
641		933
		934	void
		935	ev_unref (EV_P)
		936	{
		937	--activecnt;
		938	}
		939
		940	static int loop_done;
		941
		942	void
642	void ev_loop (int flags)	943	ev_loop (EV_P_ int flags)
643	{	944	{
644	double block;	945	double block;
645	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	946	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
646		947
647	do	948	do
648	{	949	{
649	/* queue check watchers (and execute them) */	950	/* queue check watchers (and execute them) */
650	if (preparecnt)	951	if (expect_false (preparecnt))
651	{	952	{
652	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	953	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
653	call_pending ();	954	call_pending (EV_A);
654	}	955	}
655		956
656	/* update fd-related kernel structures */	957	/* update fd-related kernel structures */
657	fd_reify ();	958	fd_reify (EV_A);
658		959
659	/* calculate blocking time */	960	/* calculate blocking time */
660		961
661	/* we only need this for !monotonic clockor timers, but as we basically	962	/* we only need this for !monotonic clockor timers, but as we basically
662	always have timers, we just calculate it always */	963	always have timers, we just calculate it always */
		964	#if EV_USE_MONOTONIC
		965	if (expect_true (have_monotonic))
		966	time_update_monotonic (EV_A);
		967	else
		968	#endif
		969	{
663	ev_now = ev_time ();	970	rt_now = ev_time ();
		971	mn_now = rt_now;
		972	}
664		973
665	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	974	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
666	block = 0.;	975	block = 0.;
667	else	976	else
668	{	977	{
669	block = MAX_BLOCKTIME;	978	block = MAX_BLOCKTIME;
670		979
671	if (timercnt)	980	if (timercnt)
672	{	981	{
673	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	982	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
674	if (block > to) block = to;	983	if (block > to) block = to;
675	}	984	}
676		985
677	if (periodiccnt)	986	if (periodiccnt)
678	{	987	{
679	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	988	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
680	if (block > to) block = to;	989	if (block > to) block = to;
681	}	990	}
682		991
683	if (block < 0.) block = 0.;	992	if (block < 0.) block = 0.;
684	}	993	}
685		994
686	method_poll (block);	995	method_poll (EV_A_ block);
687		996
688	/* update ev_now, do magic */	997	/* update rt_now, do magic */
689	time_update ();	998	time_update (EV_A);
690		999
691	/* queue pending timers and reschedule them */	1000	/* queue pending timers and reschedule them */
692	timers_reify (); /* relative timers called last */	1001	timers_reify (EV_A); /* relative timers called last */
693	periodics_reify (); /* absolute timers called first */	1002	periodics_reify (EV_A); /* absolute timers called first */
694		1003
695	/* queue idle watchers unless io or timers are pending */	1004	/* queue idle watchers unless io or timers are pending */
696	if (!pendingcnt)	1005	if (!pendingcnt)
697	queue_events ((W *)idles, idlecnt, EV_IDLE);	1006	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
698		1007
699	/* queue check watchers, to be executed first */	1008	/* queue check watchers, to be executed first */
700	if (checkcnt)	1009	if (checkcnt)
701	queue_events ((W *)checks, checkcnt, EV_CHECK);	1010	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
702		1011
703	call_pending ();	1012	call_pending (EV_A);
704	}	1013	}
705	while (!ev_loop_done);	1014	while (activecnt && !loop_done);
706		1015
707	if (ev_loop_done != 2)	1016	if (loop_done != 2)
708	ev_loop_done = 0;	1017	loop_done = 0;
		1018	}
		1019
		1020	void
		1021	ev_unloop (EV_P_ int how)
		1022	{
		1023	loop_done = how;
709	}	1024	}
710		1025
711	/*****************************************************************************/	1026	/*****************************************************************************/
712		1027
713	static void	1028	inline void
714	wlist_add (WL *head, WL elem)	1029	wlist_add (WL *head, WL elem)
715	{	1030	{
716	elem->next = *head;	1031	elem->next = *head;
717	*head = elem;	1032	*head = elem;
718	}	1033	}
719		1034
720	static void	1035	inline void
721	wlist_del (WL *head, WL elem)	1036	wlist_del (WL *head, WL elem)
722	{	1037	{
723	while (*head)	1038	while (*head)
724	{	1039	{
725	if (*head == elem)	1040	if (*head == elem)
…		…
730		1045
731	head = &(*head)->next;	1046	head = &(*head)->next;
732	}	1047	}
733	}	1048	}
734		1049
735	static void	1050	inline void
736	ev_clear (W w)	1051	ev_clear_pending (EV_P_ W w)
737	{	1052	{
738	if (w->pending)	1053	if (w->pending)
739	{	1054	{
740	pendings [w->pending - 1].w = 0;	1055	pendings [ABSPRI (w)][w->pending - 1].w = 0;
741	w->pending = 0;	1056	w->pending = 0;
742	}	1057	}
743	}	1058	}
744		1059
745	static void	1060	inline void
746	ev_start (W w, int active)	1061	ev_start (EV_P_ W w, int active)
747	{	1062	{
		1063	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1064	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1065
748	w->active = active;	1066	w->active = active;
		1067	ev_ref (EV_A);
749	}	1068	}
750		1069
751	static void	1070	inline void
752	ev_stop (W w)	1071	ev_stop (EV_P_ W w)
753	{	1072	{
		1073	ev_unref (EV_A);
754	w->active = 0;	1074	w->active = 0;
755	}	1075	}
756		1076
757	/*****************************************************************************/	1077	/*****************************************************************************/
758		1078
759	void	1079	void
760	ev_io_start (struct ev_io *w)	1080	ev_io_start (EV_P_ struct ev_io *w)
761	{	1081	{
		1082	int fd = w->fd;
		1083
762	if (ev_is_active (w))	1084	if (ev_is_active (w))
763	return;	1085	return;
764		1086
765	int fd = w->fd;	1087	assert (("ev_io_start called with negative fd", fd >= 0));
766		1088
767	ev_start ((W)w, 1);	1089	ev_start (EV_A_ (W)w, 1);
768	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1090	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
769	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1091	wlist_add ((WL *)&anfds[fd].head, (WL)w);
770		1092
771	fd_change (fd);	1093	fd_change (EV_A_ fd);
772	}	1094	}
773		1095
774	void	1096	void
775	ev_io_stop (struct ev_io *w)	1097	ev_io_stop (EV_P_ struct ev_io *w)
776	{	1098	{
777	ev_clear ((W)w);	1099	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1100	if (!ev_is_active (w))
779	return;	1101	return;
780		1102
781	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1103	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
782	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
783		1105
784	fd_change (w->fd);	1106	fd_change (EV_A_ w->fd);
785	}	1107	}
786		1108
787	void	1109	void
788	ev_timer_start (struct ev_timer *w)	1110	ev_timer_start (EV_P_ struct ev_timer *w)
789	{	1111	{
790	if (ev_is_active (w))	1112	if (ev_is_active (w))
791	return;	1113	return;
792		1114
793	w->at += now;	1115	w->at += mn_now;
794		1116
795	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1117	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
796		1118
797	ev_start ((W)w, ++timercnt);	1119	ev_start (EV_A_ (W)w, ++timercnt);
798	array_needsize (timers, timermax, timercnt, );	1120	array_needsize (timers, timermax, timercnt, );
799	timers [timercnt - 1] = w;	1121	timers [timercnt - 1] = w;
800	upheap ((WT *)timers, timercnt - 1);	1122	upheap ((WT *)timers, timercnt - 1);
801	}	1123	}
802		1124
803	void	1125	void
804	ev_timer_stop (struct ev_timer *w)	1126	ev_timer_stop (EV_P_ struct ev_timer *w)
805	{	1127	{
806	ev_clear ((W)w);	1128	ev_clear_pending (EV_A_ (W)w);
807	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
808	return;	1130	return;
809		1131
810	if (w->active < timercnt--)	1132	if (w->active < timercnt--)
811	{	1133	{
…		…
813	downheap ((WT *)timers, timercnt, w->active - 1);	1135	downheap ((WT *)timers, timercnt, w->active - 1);
814	}	1136	}
815		1137
816	w->at = w->repeat;	1138	w->at = w->repeat;
817		1139
818	ev_stop ((W)w);	1140	ev_stop (EV_A_ (W)w);
819	}	1141	}
820		1142
821	void	1143	void
822	ev_timer_again (struct ev_timer *w)	1144	ev_timer_again (EV_P_ struct ev_timer *w)
823	{	1145	{
824	if (ev_is_active (w))	1146	if (ev_is_active (w))
825	{	1147	{
826	if (w->repeat)	1148	if (w->repeat)
827	{	1149	{
828	w->at = now + w->repeat;	1150	w->at = mn_now + w->repeat;
829	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, w->active - 1);
830	}	1152	}
831	else	1153	else
832	ev_timer_stop (w);	1154	ev_timer_stop (EV_A_ w);
833	}	1155	}
834	else if (w->repeat)	1156	else if (w->repeat)
835	ev_timer_start (w);	1157	ev_timer_start (EV_A_ w);
836	}	1158	}
837		1159
838	void	1160	void
839	ev_periodic_start (struct ev_periodic *w)	1161	ev_periodic_start (EV_P_ struct ev_periodic *w)
840	{	1162	{
841	if (ev_is_active (w))	1163	if (ev_is_active (w))
842	return;	1164	return;
843		1165
844	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1166	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
845		1167
846	/* this formula differs from the one in periodic_reify because we do not always round up */	1168	/* this formula differs from the one in periodic_reify because we do not always round up */
847	if (w->interval)	1169	if (w->interval)
848	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1170	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
849		1171
850	ev_start ((W)w, ++periodiccnt);	1172	ev_start (EV_A_ (W)w, ++periodiccnt);
851	array_needsize (periodics, periodicmax, periodiccnt, );	1173	array_needsize (periodics, periodicmax, periodiccnt, );
852	periodics [periodiccnt - 1] = w;	1174	periodics [periodiccnt - 1] = w;
853	upheap ((WT *)periodics, periodiccnt - 1);	1175	upheap ((WT *)periodics, periodiccnt - 1);
854	}	1176	}
855		1177
856	void	1178	void
857	ev_periodic_stop (struct ev_periodic *w)	1179	ev_periodic_stop (EV_P_ struct ev_periodic *w)
858	{	1180	{
859	ev_clear ((W)w);	1181	ev_clear_pending (EV_A_ (W)w);
860	if (!ev_is_active (w))	1182	if (!ev_is_active (w))
861	return;	1183	return;
862		1184
863	if (w->active < periodiccnt--)	1185	if (w->active < periodiccnt--)
864	{	1186	{
865	periodics [w->active - 1] = periodics [periodiccnt];	1187	periodics [w->active - 1] = periodics [periodiccnt];
866	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1188	downheap ((WT *)periodics, periodiccnt, w->active - 1);
867	}	1189	}
868		1190
869	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
870	}	1192	}
871		1193
872	void	1194	void
873	ev_signal_start (struct ev_signal *w)	1195	ev_idle_start (EV_P_ struct ev_idle *w)
874	{	1196	{
875	if (ev_is_active (w))	1197	if (ev_is_active (w))
876	return;	1198	return;
877		1199
		1200	ev_start (EV_A_ (W)w, ++idlecnt);
		1201	array_needsize (idles, idlemax, idlecnt, );
		1202	idles [idlecnt - 1] = w;
		1203	}
		1204
		1205	void
		1206	ev_idle_stop (EV_P_ struct ev_idle *w)
		1207	{
		1208	ev_clear_pending (EV_A_ (W)w);
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	idles [w->active - 1] = idles [--idlecnt];
		1213	ev_stop (EV_A_ (W)w);
		1214	}
		1215
		1216	void
		1217	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1218	{
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	ev_start (EV_A_ (W)w, ++preparecnt);
		1223	array_needsize (prepares, preparemax, preparecnt, );
		1224	prepares [preparecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	prepares [w->active - 1] = prepares [--preparecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_check_start (EV_P_ struct ev_check *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++checkcnt);
		1245	array_needsize (checks, checkmax, checkcnt, );
		1246	checks [checkcnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_check_stop (EV_P_ struct ev_check *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	checks [w->active - 1] = checks [--checkcnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	#ifndef SA_RESTART
		1261	# define SA_RESTART 0
		1262	#endif
		1263
		1264	void
		1265	ev_signal_start (EV_P_ struct ev_signal *w)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1269	#endif
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1274
878	ev_start ((W)w, 1);	1275	ev_start (EV_A_ (W)w, 1);
879	array_needsize (signals, signalmax, w->signum, signals_init);	1276	array_needsize (signals, signalmax, w->signum, signals_init);
880	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1277	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
881		1278
882	if (!w->next)	1279	if (!w->next)
883	{	1280	{
884	struct sigaction sa;	1281	struct sigaction sa;
885	sa.sa_handler = sighandler;	1282	sa.sa_handler = sighandler;
886	sigfillset (&sa.sa_mask);	1283	sigfillset (&sa.sa_mask);
887	sa.sa_flags = 0;	1284	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
888	sigaction (w->signum, &sa, 0);	1285	sigaction (w->signum, &sa, 0);
889	}	1286	}
890	}	1287	}
891		1288
892	void	1289	void
893	ev_signal_stop (struct ev_signal *w)	1290	ev_signal_stop (EV_P_ struct ev_signal *w)
894	{	1291	{
895	ev_clear ((W)w);	1292	ev_clear_pending (EV_A_ (W)w);
896	if (!ev_is_active (w))	1293	if (!ev_is_active (w))
897	return;	1294	return;
898		1295
899	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1296	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
900	ev_stop ((W)w);	1297	ev_stop (EV_A_ (W)w);
901		1298
902	if (!signals [w->signum - 1].head)	1299	if (!signals [w->signum - 1].head)
903	signal (w->signum, SIG_DFL);	1300	signal (w->signum, SIG_DFL);
904	}	1301	}
905		1302
906	void	1303	void
907	ev_idle_start (struct ev_idle *w)	1304	ev_child_start (EV_P_ struct ev_child *w)
908	{	1305	{
		1306	#if EV_MULTIPLICITY
		1307	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1308	#endif
909	if (ev_is_active (w))	1309	if (ev_is_active (w))
910	return;	1310	return;
911		1311
912	ev_start ((W)w, ++idlecnt);	1312	ev_start (EV_A_ (W)w, 1);
913	array_needsize (idles, idlemax, idlecnt, );	1313	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
914	idles [idlecnt - 1] = w;
915	}	1314	}
916		1315
917	void	1316	void
918	ev_idle_stop (struct ev_idle *w)	1317	ev_child_stop (EV_P_ struct ev_child *w)
919	{	1318	{
920	ev_clear ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
921	if (ev_is_active (w))	1320	if (ev_is_active (w))
922	return;	1321	return;
923		1322
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);	1323	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	1324	ev_stop (EV_A_ (W)w);
991	}	1325	}
992		1326
993	/*****************************************************************************/	1327	/*****************************************************************************/
994		1328
995	struct ev_once	1329	struct ev_once
…		…
999	void (cb)(int revents, void arg);	1333	void (cb)(int revents, void arg);
1000	void *arg;	1334	void *arg;
1001	};	1335	};
1002		1336
1003	static void	1337	static void
1004	once_cb (struct ev_once *once, int revents)	1338	once_cb (EV_P_ struct ev_once *once, int revents)
1005	{	1339	{
1006	void (cb)(int revents, void arg) = once->cb;	1340	void (cb)(int revents, void arg) = once->cb;
1007	void *arg = once->arg;	1341	void *arg = once->arg;
1008		1342
1009	ev_io_stop (&once->io);	1343	ev_io_stop (EV_A_ &once->io);
1010	ev_timer_stop (&once->to);	1344	ev_timer_stop (EV_A_ &once->to);
1011	free (once);	1345	free (once);
1012		1346
1013	cb (revents, arg);	1347	cb (revents, arg);
1014	}	1348	}
1015		1349
1016	static void	1350	static void
1017	once_cb_io (struct ev_io *w, int revents)	1351	once_cb_io (EV_P_ struct ev_io *w, int revents)
1018	{	1352	{
1019	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1353	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1020	}	1354	}
1021		1355
1022	static void	1356	static void
1023	once_cb_to (struct ev_timer *w, int revents)	1357	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1024	{	1358	{
1025	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1359	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1026	}	1360	}
1027		1361
1028	void	1362	void
1029	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1363	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1030	{	1364	{
1031	struct ev_once *once = malloc (sizeof (struct ev_once));	1365	struct ev_once *once = malloc (sizeof (struct ev_once));
1032		1366
1033	if (!once)	1367	if (!once)
1034	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1368	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1039		1373
1040	ev_watcher_init (&once->io, once_cb_io);	1374	ev_watcher_init (&once->io, once_cb_io);
1041	if (fd >= 0)	1375	if (fd >= 0)
1042	{	1376	{
1043	ev_io_set (&once->io, fd, events);	1377	ev_io_set (&once->io, fd, events);
1044	ev_io_start (&once->io);	1378	ev_io_start (EV_A_ &once->io);
1045	}	1379	}
1046		1380
1047	ev_watcher_init (&once->to, once_cb_to);	1381	ev_watcher_init (&once->to, once_cb_to);
1048	if (timeout >= 0.)	1382	if (timeout >= 0.)
1049	{	1383	{
1050	ev_timer_set (&once->to, timeout, 0.);	1384	ev_timer_set (&once->to, timeout, 0.);
1051	ev_timer_start (&once->to);	1385	ev_timer_start (EV_A_ &once->to);
1052	}	1386	}
1053	}	1387	}
1054	}	1388	}
1055		1389
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 1.61 by root, Sun Nov 4 19:45:09 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 1.61 by root, Sun Nov 4 19:45:09 2007 UTC