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

Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
41	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
42	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
43	#include <sys/time.h>	50	#include <sys/time.h>
44	#include <time.h>	51	#include <time.h>
45		52
		53	/**/
		54
46	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
47	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
48	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
49	# endif	84	#endif
50	#endif
51		85
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
62	#endif	89	#endif
		90
		91	/**/
63		92
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
67		97
68	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
69		113
70	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
73		117
74	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77
78	static int have_monotonic; /* runtime */
79
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
81	static void (*method_modify)(int fd, int oev, int nev);
82	static void (*method_poll)(ev_tstamp timeout);
83		119
84	/*****************************************************************************/	120	/*****************************************************************************/
85		121
86	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
87	ev_time (void)	156	ev_time (void)
88	{	157	{
89	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
90	struct timespec ts;	159	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	162	#else
94	struct timeval tv;	163	struct timeval tv;
95	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	166	#endif
98	}	167	}
99		168
100	static ev_tstamp	169	inline ev_tstamp
101	get_clock (void)	170	get_clock (void)
102	{	171	{
103	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
104	if (have_monotonic)	173	if (expect_true (have_monotonic))
105	{	174	{
106	struct timespec ts;	175	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	178	}
110	#endif	179	#endif
111		180
112	return ev_time ();	181	return ev_time ();
113	}	182	}
114		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		191
115	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
117	{ \	194	{ \
118	int newcnt = cur; \	195	int newcnt = cur; \
119	do \	196	do \
120	{ \	197	{ \
121	newcnt = (newcnt << 1) \| 4 & ~3; \	198	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	199	} \
123	while ((cnt) > newcnt); \	200	while ((cnt) > newcnt); \
124	\	201	\
125	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
126	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	204	cur = newcnt; \
128	}	205	}
129		206
130	/*****************************************************************************/	207	/*****************************************************************************/
131		208
132	typedef struct
133	{
134	struct ev_io *head;
135	int events;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static void	209	static void
142	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
143	{	211	{
144	while (count--)	212	while (count--)
145	{	213	{
146	base->head = 0;	214	base->head = 0;
147	base->events = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
148	++base;	218	++base;
149	}	219	}
150	}	220	}
151		221
152	typedef struct
153	{
154	W w;
155	int events;
156	} ANPENDING;
157
158	static ANPENDING *pendings;
159	static int pendingmax, pendingcnt;
160
161	static void	222	static void
162	event (W w, int events)	223	event (EV_P_ W w, int events)
163	{	224	{
164	if (w->active)	225	if (w->pending)
165	{	226	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
170	}	229	}
171	}
172		230
		231	w->pending = ++pendingcnt [ABSPRI (w)];
		232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		233	pendings [ABSPRI (w)][w->pending - 1].w = w;
		234	pendings [ABSPRI (w)][w->pending - 1].events = events;
		235	}
		236
173	static void	237	static void
174	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	239	{
176	int i;	240	int i;
177		241
178	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	243	event (EV_A_ events [i], type);
180	}	244	}
181		245
182	static void	246	static void
183	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
184	{	248	{
185	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	250	struct ev_io *w;
187		251
188	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
189	{	253	{
190	int ev = w->events & events;	254	int ev = w->events & events;
191		255
192	if (ev)	256	if (ev)
193	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
194	}	258	}
195	}	259	}
196		260
197	/*****************************************************************************/	261	/*****************************************************************************/
198		262
199	static int *fdchanges;
200	static int fdchangemax, fdchangecnt;
201
202	static void	263	static void
203	fd_reify (void)	264	fd_reify (EV_P)
204	{	265	{
205	int i;	266	int i;
206		267
207	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
208	{	269	{
…		…
210	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	272	struct ev_io *w;
212		273
213	int events = 0;	274	int events = 0;
214		275
215	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
216	events \|= w->events;	277	events \|= w->events;
217		278
218	anfd->events &= ~EV_REIFY;	279	anfd->reify = 0;
219		280
220	if (anfd->events != events)	281	if (anfd->events != events)
221	{	282	{
222	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
223	anfd->events = events;	284	anfd->events = events;
224	}	285	}
225	}	286	}
226		287
227	fdchangecnt = 0;	288	fdchangecnt = 0;
228	}	289	}
229		290
230	static void	291	static void
231	fd_change (int fd)	292	fd_change (EV_P_ int fd)
232	{	293	{
233	if (anfds [fd].events & EV_REIFY)	294	if (anfds [fd].reify \|\| fdchangecnt < 0)
234	return;	295	return;
235		296
236	anfds [fd].events \|= EV_REIFY;	297	anfds [fd].reify = 1;
237		298
238	++fdchangecnt;	299	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
240	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
241	}	302	}
242		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
		314	}
		315
243	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
244	static void	317	static void
245	fd_recheck (void)	318	fd_ebadf (EV_P)
246	{	319	{
247	int fd;	320	int fd;
248		321
249	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	323	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
252	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
253	{	336	{
254	event ((W)anfds [fd].head, EV_ERROR);	337	close (fd);
255	evio_stop (anfds [fd].head);	338	fd_kill (EV_A_ fd);
		339	return;
256	}	340	}
257	}	341	}
258		342
259	/*****************************************************************************/	343	/*****************************************************************************/
260		344
261	static struct ev_timer **timers;
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266
267	static void	345	static void
268	upheap (WT *timers, int k)	346	upheap (WT *heap, int k)
269	{	347	{
270	WT w = timers [k];	348	WT w = heap [k];
271		349
272	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
273	{	351	{
274	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
276	k >>= 1;	354	k >>= 1;
277	}	355	}
278		356
279	timers [k] = w;	357	heap [k] = w;
280	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
281		359
282	}	360	}
283		361
284	static void	362	static void
285	downheap (WT *timers, int N, int k)	363	downheap (WT *heap, int N, int k)
286	{	364	{
287	WT w = timers [k];	365	WT w = heap [k];
288		366
289	while (k < (N >> 1))	367	while (k < (N >> 1))
290	{	368	{
291	int j = k << 1;	369	int j = k << 1;
292		370
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	372	++j;
295		373
296	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
297	break;	375	break;
298		376
299	timers [k] = timers [j];	377	heap [k] = heap [j];
300	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
301	k = j;	379	k = j;
302	}	380	}
303		381
304	timers [k] = w;	382	heap [k] = w;
305	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
306	}	384	}
307		385
308	/*****************************************************************************/	386	/*****************************************************************************/
309		387
310	typedef struct	388	typedef struct
311	{	389	{
312	struct ev_signal *head;	390	struct ev_watcher_list *head;
313	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
314	} ANSIG;	392	} ANSIG;
315		393
316	static ANSIG *signals;	394	static ANSIG *signals;
317	static int signalmax;	395	static int signalmax;
318		396
319	static int sigpipe [2];	397	static int sigpipe [2];
320	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;
322		399
323	static void	400	static void
324	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
325	{	402	{
326	while (count--)	403	while (count--)
327	{	404	{
328	base->head = 0;	405	base->head = 0;
329	base->gotsig = 0;	406	base->gotsig = 0;
		407
330	++base;	408	++base;
331	}	409	}
332	}	410	}
333		411
334	static void	412	static void
…		…
336	{	414	{
337	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
338		416
339	if (!gotsig)	417	if (!gotsig)
340	{	418	{
		419	int old_errno = errno;
341	gotsig = 1;	420	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
343	}	423	}
344	}	424	}
345		425
346	static void	426	static void
347	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	428	{
349	struct ev_signal *w;	429	struct ev_watcher_list *w;
350	int sig;	430	int signum;
351		431
		432	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	433	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		434
355	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
357	{	437	{
358	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
359		439
360	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
362	}	442	}
363	}	443	}
364		444
365	static void	445	static void
366	siginit (void)	446	siginit (EV_P)
367	{	447	{
		448	#ifndef WIN32
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370		451
371	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
374		456
375	evio_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	evio_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	460	}
378		461
379	/*****************************************************************************/	462	/*****************************************************************************/
380		463
381	static struct ev_idle **idles;	464	#ifndef WIN32
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391
392	static struct ev_child *childs [PID_HASHSIZE];
393	static struct ev_signal childev;
394		465
395	#ifndef WCONTINUED	466	#ifndef WCONTINUED
396	# define WCONTINUED 0	467	# define WCONTINUED 0
397	#endif	468	#endif
398		469
399	static void	470	static void
400	childcb (struct ev_signal *sw, int revents)	471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	472	{
402	struct ev_child *w;	473	struct ev_child *w;
		474
		475	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		476	if (w->pid == pid \|\| !w->pid)
		477	{
		478	w->priority = sw->priority; /* need to do it now */
		479	w->rpid = pid;
		480	w->rstatus = status;
		481	event (EV_A_ (W)w, EV_CHILD);
		482	}
		483	}
		484
		485	static void
		486	childcb (EV_P_ struct ev_signal *sw, int revents)
		487	{
403	int pid, status;	488	int pid, status;
404		489
405	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	490	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	491	{
407	if (w->pid == pid \|\| w->pid == -1)	492	/* make sure we are called again until all childs have been reaped */
408	{	493	event (EV_A_ (W)sw, EV_SIGNAL);
409	w->status = status;	494
410	event ((W)w, EV_CHILD);	495	child_reap (EV_A_ sw, pid, pid, status);
411	}	496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
412	}	498	}
		499
		500	#endif
413		501
414	/*****************************************************************************/	502	/*****************************************************************************/
415		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
416	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	508	# include "ev_epoll.c"
418	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
419	#if HAVE_SELECT	513	#if EV_USE_SELECT
420	# include "ev_select.c"	514	# include "ev_select.c"
421	#endif	515	#endif
422		516
423	int	517	int
424	ev_version_major (void)	518	ev_version_major (void)
…		…
430	ev_version_minor (void)	524	ev_version_minor (void)
431	{	525	{
432	return EV_VERSION_MINOR;	526	return EV_VERSION_MINOR;
433	}	527	}
434		528
435	int ev_init (int flags)	529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
436	{	532	{
		533	#ifdef WIN32
		534	return 0;
		535	#else
		536	return getuid () != geteuid ()
		537	\|\| getgid () != getegid ();
		538	#endif
		539	}
		540
		541	int
		542	ev_method (EV_P)
		543	{
		544	return method;
		545	}
		546
		547	inline int
		548	loop_init (EV_P_ int methods)
		549	{
437	if (!ev_method)	550	if (!method)
438	{	551	{
439	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
440	{	553	{
441	struct timespec ts;	554	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	556	have_monotonic = 1;
444	}	557	}
445	#endif	558	#endif
446		559
447	ev_now = ev_time ();	560	rt_now = ev_time ();
448	now = get_clock ();	561	mn_now = get_clock ();
		562	now_floor = mn_now;
449	diff = ev_now - now;	563	rtmn_diff = rt_now - mn_now;
450		564
451	if (pipe (sigpipe))	565	if (pipe (sigpipe))
452	return 0;	566	return 0;
453		567
		568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
454	ev_method = EVMETHOD_NONE;	572	methods = EVMETHOD_ANY;
		573
		574	method = 0;
		575	#if EV_USE_KQUEUE
		576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		577	#endif
455	#if HAVE_EPOLL	578	#if EV_USE_EPOLL
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
457	#endif	580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
458	#if HAVE_SELECT	584	#if EV_USE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
460	#endif	586	#endif
461		587
462	if (ev_method)	588	if (method)
463	{	589	{
464	evw_init (&sigev, sigcb);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
465	siginit ();	592	siginit (EV_A);
466		593
		594	#ifndef WIN32
467	evsignal_init (&childev, childcb, SIGCHLD);	595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
468	evsignal_start (&childev);	597	ev_signal_start (EV_A_ &childev);
		598	ev_unref (EV_A); /* child watcher should not keep loop alive */
		599	#endif
469	}	600	}
470	}	601	}
471		602
472	return ev_method;	603	return method;
473	}	604	}
		605
		606	#if EV_MULTIPLICITY
		607
		608	struct ev_loop *
		609	ev_loop_new (int methods)
		610	{
		611	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		612
		613	if (loop_init (EV_A_ methods))
		614	return loop;
		615
		616	ev_loop_delete (loop);
		617
		618	return 0;
		619	}
		620
		621	void
		622	ev_loop_delete (EV_P)
		623	{
		624	/TODO/
		625	free (loop);
		626	}
		627
		628	#else
		629
		630	int
		631	ev_init (int methods)
		632	{
		633	return loop_init (methods);
		634	}
		635
		636	#endif
474		637
475	/*****************************************************************************/	638	/*****************************************************************************/
476		639
477	void	640	void
478	ev_prefork (void)	641	ev_fork_prepare (void)
479	{	642	{
480	/* nop */	643	/* nop */
481	}	644	}
482		645
483	void	646	void
484	ev_postfork_parent (void)	647	ev_fork_parent (void)
485	{	648	{
486	/* nop */	649	/* nop */
487	}	650	}
488		651
489	void	652	void
490	ev_postfork_child (void)	653	ev_fork_child (void)
491	{	654	{
		655	/TODO/
		656	#if !EV_MULTIPLICITY
492	#if HAVE_EPOLL	657	#if EV_USE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)	658	if (method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();	659	epoll_postfork_child (EV_A);
495	#endif	660	#endif
496		661
497	evio_stop (&sigev);	662	ev_io_stop (EV_A_ &sigev);
498	close (sigpipe [0]);	663	close (sigpipe [0]);
499	close (sigpipe [1]);	664	close (sigpipe [1]);
500	pipe (sigpipe);	665	pipe (sigpipe);
501	siginit ();	666	siginit (EV_A);
		667	#endif
502	}	668	}
503		669
504	/*****************************************************************************/	670	/*****************************************************************************/
505		671
506	static void	672	static void
507	call_pending (void)	673	call_pending (EV_P)
508	{	674	{
		675	int pri;
		676
		677	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	678	while (pendingcnt [pri])
510	{	679	{
511	ANPENDING *p = pendings + --pendingcnt;	680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		681
513	if (p->w)	682	if (p->w)
514	{	683	{
515	p->w->pending = 0;	684	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	685	p->w->cb (EV_A_ p->w, p->events);
517	}	686	}
518	}	687	}
519	}	688	}
520		689
521	static void	690	static void
522	timers_reify (void)	691	timers_reify (EV_P)
523	{	692	{
524	while (timercnt && timers [0]->at <= now)	693	while (timercnt && timers [0]->at <= mn_now)
525	{	694	{
526	struct ev_timer *w = timers [0];	695	struct ev_timer *w = timers [0];
527
528	event ((W)w, EV_TIMEOUT);
529		696
530	/* first reschedule or stop timer */	697	/* first reschedule or stop timer */
531	if (w->repeat)	698	if (w->repeat)
532	{	699	{
		700	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	701	w->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	702	downheap ((WT *)timers, timercnt, 0);
536	}	703	}
537	else	704	else
538	evtimer_stop (w); /* nonrepeating: stop timer */	705	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		706
		707	event (EV_A_ (W)w, EV_TIMEOUT);
		708	}
		709	}
		710
542	static void	711	static void
543	periodics_reify (void)	712	periodics_reify (EV_P)
544	{	713	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	714	while (periodiccnt && periodics [0]->at <= rt_now)
546	{	715	{
547	struct ev_periodic *w = periodics [0];	716	struct ev_periodic *w = periodics [0];
548		717
549	/* first reschedule or stop timer */	718	/* first reschedule or stop timer */
550	if (w->interval)	719	if (w->interval)
551	{	720	{
552	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	721	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
553	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	722	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
554	downheap ((WT *)periodics, periodiccnt, 0);	723	downheap ((WT *)periodics, periodiccnt, 0);
555	}	724	}
556	else	725	else
557	evperiodic_stop (w); /* nonrepeating: stop timer */	726	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		727
559	event ((W)w, EV_TIMEOUT);	728	event (EV_A_ (W)w, EV_PERIODIC);
560	}	729	}
561	}	730	}
562		731
563	static void	732	static void
564	periodics_reschedule (ev_tstamp diff)	733	periodics_reschedule (EV_P)
565	{	734	{
566	int i;	735	int i;
567		736
568	/* adjust periodics after time jump */	737	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	738	for (i = 0; i < periodiccnt; ++i)
570	{	739	{
571	struct ev_periodic *w = periodics [i];	740	struct ev_periodic *w = periodics [i];
572		741
573	if (w->interval)	742	if (w->interval)
574	{	743	{
575	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	744	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
576		745
577	if (fabs (diff) >= 1e-4)	746	if (fabs (diff) >= 1e-4)
578	{	747	{
579	evperiodic_stop (w);	748	ev_periodic_stop (EV_A_ w);
580	evperiodic_start (w);	749	ev_periodic_start (EV_A_ w);
581		750
582	i = 0; /* restart loop, inefficient, but time jumps should be rare */	751	i = 0; /* restart loop, inefficient, but time jumps should be rare */
583	}	752	}
584	}	753	}
585	}	754	}
586	}	755	}
587		756
		757	inline int
		758	time_update_monotonic (EV_P)
		759	{
		760	mn_now = get_clock ();
		761
		762	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		763	{
		764	rt_now = rtmn_diff + mn_now;
		765	return 0;
		766	}
		767	else
		768	{
		769	now_floor = mn_now;
		770	rt_now = ev_time ();
		771	return 1;
		772	}
		773	}
		774
588	static void	775	static void
589	time_update (void)	776	time_update (EV_P)
590	{	777	{
591	int i;	778	int i;
592		779
593	ev_now = ev_time ();	780	#if EV_USE_MONOTONIC
594
595	if (have_monotonic)	781	if (expect_true (have_monotonic))
596	{	782	{
597	ev_tstamp odiff = diff;	783	if (time_update_monotonic (EV_A))
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	784	{
601	now = get_clock ();	785	ev_tstamp odiff = rtmn_diff;
		786
		787	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		788	{
602	diff = ev_now - now;	789	rtmn_diff = rt_now - mn_now;
603		790
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)	791	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
605	return; /* all is well */	792	return; /* all is well */
606		793
607	ev_now = ev_time ();	794	rt_now = ev_time ();
		795	mn_now = get_clock ();
		796	now_floor = mn_now;
		797	}
		798
		799	periodics_reschedule (EV_A);
		800	/* no timer adjustment, as the monotonic clock doesn't jump */
		801	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
608	}	802	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}	803	}
613	else	804	else
		805	#endif
614	{	806	{
615	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	807	rt_now = ev_time ();
		808
		809	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
616	{	810	{
617	periodics_reschedule (ev_now - now);	811	periodics_reschedule (EV_A);
618		812
619	/* adjust timers. this is easy, as the offset is the same for all */	813	/* adjust timers. this is easy, as the offset is the same for all */
620	for (i = 0; i < timercnt; ++i)	814	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	815	timers [i]->at += rt_now - mn_now;
622	}	816	}
623		817
624	now = ev_now;	818	mn_now = rt_now;
625	}	819	}
626	}	820	}
627		821
628	int ev_loop_done;	822	void
		823	ev_ref (EV_P)
		824	{
		825	++activecnt;
		826	}
629		827
		828	void
		829	ev_unref (EV_P)
		830	{
		831	--activecnt;
		832	}
		833
		834	static int loop_done;
		835
		836	void
630	void ev_loop (int flags)	837	ev_loop (EV_P_ int flags)
631	{	838	{
632	double block;	839	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	840	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
634		841
635	do	842	do
636	{	843	{
637	/* queue check watchers (and execute them) */	844	/* queue check watchers (and execute them) */
638	if (preparecnt)	845	if (expect_false (preparecnt))
639	{	846	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	847	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	848	call_pending (EV_A);
642	}	849	}
643		850
644	/* update fd-related kernel structures */	851	/* update fd-related kernel structures */
645	fd_reify ();	852	fd_reify (EV_A);
646		853
647	/* calculate blocking time */	854	/* calculate blocking time */
648		855
649	/* we only need this for !monotonic clockor timers, but as we basically	856	/* we only need this for !monotonic clockor timers, but as we basically
650	always have timers, we just calculate it always */	857	always have timers, we just calculate it always */
		858	#if EV_USE_MONOTONIC
		859	if (expect_true (have_monotonic))
		860	time_update_monotonic (EV_A);
		861	else
		862	#endif
		863	{
651	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = rt_now;
		866	}
652		867
653	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	868	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
654	block = 0.;	869	block = 0.;
655	else	870	else
656	{	871	{
657	block = MAX_BLOCKTIME;	872	block = MAX_BLOCKTIME;
658		873
659	if (timercnt)	874	if (timercnt)
660	{	875	{
661	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	876	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
662	if (block > to) block = to;	877	if (block > to) block = to;
663	}	878	}
664		879
665	if (periodiccnt)	880	if (periodiccnt)
666	{	881	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	882	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
668	if (block > to) block = to;	883	if (block > to) block = to;
669	}	884	}
670		885
671	if (block < 0.) block = 0.;	886	if (block < 0.) block = 0.;
672	}	887	}
673		888
674	method_poll (block);	889	method_poll (EV_A_ block);
675		890
676	/* update ev_now, do magic */	891	/* update rt_now, do magic */
677	time_update ();	892	time_update (EV_A);
678		893
679	/* queue pending timers and reschedule them */	894	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	895	timers_reify (EV_A); /* relative timers called last */
681	periodics_reify (); /* absolute timers called first */	896	periodics_reify (EV_A); /* absolute timers called first */
682		897
683	/* queue idle watchers unless io or timers are pending */	898	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	899	if (!pendingcnt)
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	900	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		901
687	/* queue check watchers, to be executed first */	902	/* queue check watchers, to be executed first */
688	if (checkcnt)	903	if (checkcnt)
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	904	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		905
691	call_pending ();	906	call_pending (EV_A);
692	}	907	}
693	while (!ev_loop_done);	908	while (activecnt && !loop_done);
694		909
695	if (ev_loop_done != 2)	910	if (loop_done != 2)
696	ev_loop_done = 0;	911	loop_done = 0;
		912	}
		913
		914	void
		915	ev_unloop (EV_P_ int how)
		916	{
		917	loop_done = how;
697	}	918	}
698		919
699	/*****************************************************************************/	920	/*****************************************************************************/
700		921
701	static void	922	inline void
702	wlist_add (WL *head, WL elem)	923	wlist_add (WL *head, WL elem)
703	{	924	{
704	elem->next = *head;	925	elem->next = *head;
705	*head = elem;	926	*head = elem;
706	}	927	}
707		928
708	static void	929	inline void
709	wlist_del (WL *head, WL elem)	930	wlist_del (WL *head, WL elem)
710	{	931	{
711	while (*head)	932	while (*head)
712	{	933	{
713	if (*head == elem)	934	if (*head == elem)
…		…
718		939
719	head = &(*head)->next;	940	head = &(*head)->next;
720	}	941	}
721	}	942	}
722		943
723	static void	944	inline void
724	ev_clear (W w)	945	ev_clear_pending (EV_P_ W w)
725	{	946	{
726	if (w->pending)	947	if (w->pending)
727	{	948	{
728	pendings [w->pending - 1].w = 0;	949	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	950	w->pending = 0;
730	}	951	}
731	}	952	}
732		953
733	static void	954	inline void
734	ev_start (W w, int active)	955	ev_start (EV_P_ W w, int active)
735	{	956	{
		957	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		958	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		959
736	w->active = active;	960	w->active = active;
		961	ev_ref (EV_A);
737	}	962	}
738		963
739	static void	964	inline void
740	ev_stop (W w)	965	ev_stop (EV_P_ W w)
741	{	966	{
		967	ev_unref (EV_A);
742	w->active = 0;	968	w->active = 0;
743	}	969	}
744		970
745	/*****************************************************************************/	971	/*****************************************************************************/
746		972
747	void	973	void
748	evio_start (struct ev_io *w)	974	ev_io_start (EV_P_ struct ev_io *w)
749	{	975	{
		976	int fd = w->fd;
		977
750	if (ev_is_active (w))	978	if (ev_is_active (w))
751	return;	979	return;
752		980
753	int fd = w->fd;	981	assert (("ev_io_start called with negative fd", fd >= 0));
754		982
755	ev_start ((W)w, 1);	983	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	984	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	985	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		986
759	fd_change (fd);	987	fd_change (EV_A_ fd);
760	}	988	}
761		989
762	void	990	void
763	evio_stop (struct ev_io *w)	991	ev_io_stop (EV_P_ struct ev_io *w)
764	{	992	{
765	ev_clear ((W)w);	993	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	994	if (!ev_is_active (w))
767	return;	995	return;
768		996
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	997	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	998	ev_stop (EV_A_ (W)w);
771		999
772	fd_change (w->fd);	1000	fd_change (EV_A_ w->fd);
773	}	1001	}
774		1002
775	void	1003	void
776	evtimer_start (struct ev_timer *w)	1004	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	1005	{
778	if (ev_is_active (w))	1006	if (ev_is_active (w))
779	return;	1007	return;
780		1008
781	w->at += now;	1009	w->at += mn_now;
782		1010
783	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1011	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
784		1012
785	ev_start ((W)w, ++timercnt);	1013	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1014	array_needsize (timers, timermax, timercnt, );
787	timers [timercnt - 1] = w;	1015	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1016	upheap ((WT *)timers, timercnt - 1);
789	}	1017	}
790		1018
791	void	1019	void
792	evtimer_stop (struct ev_timer *w)	1020	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	1021	{
794	ev_clear ((W)w);	1022	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1023	if (!ev_is_active (w))
796	return;	1024	return;
797		1025
798	if (w->active < timercnt--)	1026	if (w->active < timercnt--)
799	{	1027	{
…		…
801	downheap ((WT *)timers, timercnt, w->active - 1);	1029	downheap ((WT *)timers, timercnt, w->active - 1);
802	}	1030	}
803		1031
804	w->at = w->repeat;	1032	w->at = w->repeat;
805		1033
806	ev_stop ((W)w);	1034	ev_stop (EV_A_ (W)w);
807	}	1035	}
808		1036
809	void	1037	void
810	evtimer_again (struct ev_timer *w)	1038	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	1039	{
812	if (ev_is_active (w))	1040	if (ev_is_active (w))
813	{	1041	{
814	if (w->repeat)	1042	if (w->repeat)
815	{	1043	{
816	w->at = now + w->repeat;	1044	w->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1045	downheap ((WT *)timers, timercnt, w->active - 1);
818	}	1046	}
819	else	1047	else
820	evtimer_stop (w);	1048	ev_timer_stop (EV_A_ w);
821	}	1049	}
822	else if (w->repeat)	1050	else if (w->repeat)
823	evtimer_start (w);	1051	ev_timer_start (EV_A_ w);
824	}	1052	}
825		1053
826	void	1054	void
827	evperiodic_start (struct ev_periodic *w)	1055	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1056	{
829	if (ev_is_active (w))	1057	if (ev_is_active (w))
830	return;	1058	return;
831		1059
832	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1060	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
833		1061
834	/* this formula differs from the one in periodic_reify because we do not always round up */	1062	/* this formula differs from the one in periodic_reify because we do not always round up */
835	if (w->interval)	1063	if (w->interval)
836	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1064	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
837		1065
838	ev_start ((W)w, ++periodiccnt);	1066	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1067	array_needsize (periodics, periodicmax, periodiccnt, );
840	periodics [periodiccnt - 1] = w;	1068	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1069	upheap ((WT *)periodics, periodiccnt - 1);
842	}	1070	}
843		1071
844	void	1072	void
845	evperiodic_stop (struct ev_periodic *w)	1073	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1074	{
847	ev_clear ((W)w);	1075	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1076	if (!ev_is_active (w))
849	return;	1077	return;
850		1078
851	if (w->active < periodiccnt--)	1079	if (w->active < periodiccnt--)
852	{	1080	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1081	periodics [w->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1082	downheap ((WT *)periodics, periodiccnt, w->active - 1);
855	}	1083	}
856		1084
857	ev_stop ((W)w);	1085	ev_stop (EV_A_ (W)w);
858	}	1086	}
859		1087
		1088	#ifndef SA_RESTART
		1089	# define SA_RESTART 0
		1090	#endif
		1091
860	void	1092	void
861	evsignal_start (struct ev_signal *w)	1093	ev_signal_start (EV_P_ struct ev_signal *w)
862	{	1094	{
863	if (ev_is_active (w))	1095	if (ev_is_active (w))
864	return;	1096	return;
865		1097
		1098	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1099
866	ev_start ((W)w, 1);	1100	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1101	array_needsize (signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1102	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1103
870	if (!w->next)	1104	if (!w->next)
871	{	1105	{
872	struct sigaction sa;	1106	struct sigaction sa;
873	sa.sa_handler = sighandler;	1107	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1108	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1110	sigaction (w->signum, &sa, 0);
877	}	1111	}
878	}	1112	}
879		1113
880	void	1114	void
881	evsignal_stop (struct ev_signal *w)	1115	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1116	{
883	ev_clear ((W)w);	1117	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1118	if (!ev_is_active (w))
885	return;	1119	return;
886		1120
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1121	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1122	ev_stop (EV_A_ (W)w);
889		1123
890	if (!signals [w->signum - 1].head)	1124	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1125	signal (w->signum, SIG_DFL);
892	}	1126	}
893		1127
		1128	void
894	void evidle_start (struct ev_idle *w)	1129	ev_idle_start (EV_P_ struct ev_idle *w)
895	{	1130	{
896	if (ev_is_active (w))	1131	if (ev_is_active (w))
897	return;	1132	return;
898		1133
899	ev_start ((W)w, ++idlecnt);	1134	ev_start (EV_A_ (W)w, ++idlecnt);
900	array_needsize (idles, idlemax, idlecnt, );	1135	array_needsize (idles, idlemax, idlecnt, );
901	idles [idlecnt - 1] = w;	1136	idles [idlecnt - 1] = w;
902	}	1137	}
903		1138
		1139	void
904	void evidle_stop (struct ev_idle *w)	1140	ev_idle_stop (EV_P_ struct ev_idle *w)
905	{	1141	{
906	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
907	if (ev_is_active (w))	1143	if (ev_is_active (w))
908	return;	1144	return;
909		1145
910	idles [w->active - 1] = idles [--idlecnt];	1146	idles [w->active - 1] = idles [--idlecnt];
911	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
912	}	1148	}
913		1149
		1150	void
914	void evprepare_start (struct ev_prepare *w)	1151	ev_prepare_start (EV_P_ struct ev_prepare *w)
915	{	1152	{
916	if (ev_is_active (w))	1153	if (ev_is_active (w))
917	return;	1154	return;
918		1155
919	ev_start ((W)w, ++preparecnt);	1156	ev_start (EV_A_ (W)w, ++preparecnt);
920	array_needsize (prepares, preparemax, preparecnt, );	1157	array_needsize (prepares, preparemax, preparecnt, );
921	prepares [preparecnt - 1] = w;	1158	prepares [preparecnt - 1] = w;
922	}	1159	}
923		1160
		1161	void
924	void evprepare_stop (struct ev_prepare *w)	1162	ev_prepare_stop (EV_P_ struct ev_prepare *w)
925	{	1163	{
926	ev_clear ((W)w);	1164	ev_clear_pending (EV_A_ (W)w);
927	if (ev_is_active (w))	1165	if (ev_is_active (w))
928	return;	1166	return;
929		1167
930	prepares [w->active - 1] = prepares [--preparecnt];	1168	prepares [w->active - 1] = prepares [--preparecnt];
931	ev_stop ((W)w);	1169	ev_stop (EV_A_ (W)w);
932	}	1170	}
933		1171
		1172	void
934	void evcheck_start (struct ev_check *w)	1173	ev_check_start (EV_P_ struct ev_check *w)
935	{	1174	{
936	if (ev_is_active (w))	1175	if (ev_is_active (w))
937	return;	1176	return;
938		1177
939	ev_start ((W)w, ++checkcnt);	1178	ev_start (EV_A_ (W)w, ++checkcnt);
940	array_needsize (checks, checkmax, checkcnt, );	1179	array_needsize (checks, checkmax, checkcnt, );
941	checks [checkcnt - 1] = w;	1180	checks [checkcnt - 1] = w;
942	}	1181	}
943		1182
		1183	void
944	void evcheck_stop (struct ev_check *w)	1184	ev_check_stop (EV_P_ struct ev_check *w)
945	{	1185	{
946	ev_clear ((W)w);	1186	ev_clear_pending (EV_A_ (W)w);
947	if (ev_is_active (w))	1187	if (ev_is_active (w))
948	return;	1188	return;
949		1189
950	checks [w->active - 1] = checks [--checkcnt];	1190	checks [w->active - 1] = checks [--checkcnt];
951	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
952	}	1192	}
953		1193
		1194	void
954	void evchild_start (struct ev_child *w)	1195	ev_child_start (EV_P_ struct ev_child *w)
955	{	1196	{
956	if (ev_is_active (w))	1197	if (ev_is_active (w))
957	return;	1198	return;
958		1199
959	ev_start ((W)w, 1);	1200	ev_start (EV_A_ (W)w, 1);
960	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1201	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
961	}	1202	}
962		1203
		1204	void
963	void evchild_stop (struct ev_child *w)	1205	ev_child_stop (EV_P_ struct ev_child *w)
964	{	1206	{
965	ev_clear ((W)w);	1207	ev_clear_pending (EV_A_ (W)w);
966	if (ev_is_active (w))	1208	if (ev_is_active (w))
967	return;	1209	return;
968		1210
969	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1211	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	ev_stop ((W)w);	1212	ev_stop (EV_A_ (W)w);
971	}	1213	}
972		1214
973	/*****************************************************************************/	1215	/*****************************************************************************/
974		1216
975	struct ev_once	1217	struct ev_once
…		…
979	void (cb)(int revents, void arg);	1221	void (cb)(int revents, void arg);
980	void *arg;	1222	void *arg;
981	};	1223	};
982		1224
983	static void	1225	static void
984	once_cb (struct ev_once *once, int revents)	1226	once_cb (EV_P_ struct ev_once *once, int revents)
985	{	1227	{
986	void (cb)(int revents, void arg) = once->cb;	1228	void (cb)(int revents, void arg) = once->cb;
987	void *arg = once->arg;	1229	void *arg = once->arg;
988		1230
989	evio_stop (&once->io);	1231	ev_io_stop (EV_A_ &once->io);
990	evtimer_stop (&once->to);	1232	ev_timer_stop (EV_A_ &once->to);
991	free (once);	1233	free (once);
992		1234
993	cb (revents, arg);	1235	cb (revents, arg);
994	}	1236	}
995		1237
996	static void	1238	static void
997	once_cb_io (struct ev_io *w, int revents)	1239	once_cb_io (EV_P_ struct ev_io *w, int revents)
998	{	1240	{
999	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1241	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1000	}	1242	}
1001		1243
1002	static void	1244	static void
1003	once_cb_to (struct ev_timer *w, int revents)	1245	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1004	{	1246	{
1005	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1247	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1006	}	1248	}
1007		1249
1008	void	1250	void
1009	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1251	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1010	{	1252	{
1011	struct ev_once *once = malloc (sizeof (struct ev_once));	1253	struct ev_once *once = malloc (sizeof (struct ev_once));
1012		1254
1013	if (!once)	1255	if (!once)
1014	cb (EV_ERROR, arg);	1256	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1015	else	1257	else
1016	{	1258	{
1017	once->cb = cb;	1259	once->cb = cb;
1018	once->arg = arg;	1260	once->arg = arg;
1019		1261
1020	evw_init (&once->io, once_cb_io);	1262	ev_watcher_init (&once->io, once_cb_io);
1021
1022	if (fd >= 0)	1263	if (fd >= 0)
1023	{	1264	{
1024	evio_set (&once->io, fd, events);	1265	ev_io_set (&once->io, fd, events);
1025	evio_start (&once->io);	1266	ev_io_start (EV_A_ &once->io);
1026	}	1267	}
1027		1268
1028	evw_init (&once->to, once_cb_to);	1269	ev_watcher_init (&once->to, once_cb_to);
1029
1030	if (timeout >= 0.)	1270	if (timeout >= 0.)
1031	{	1271	{
1032	evtimer_set (&once->to, timeout, 0.);	1272	ev_timer_set (&once->to, timeout, 0.);
1033	evtimer_start (&once->to);	1273	ev_timer_start (EV_A_ &once->to);
1034	}	1274	}
1035	}	1275	}
1036	}	1276	}
1037		1277
1038	/*****************************************************************************/	1278	/*****************************************************************************/
…		…
1049		1289
1050	static void	1290	static void
1051	ocb (struct ev_timer *w, int revents)	1291	ocb (struct ev_timer *w, int revents)
1052	{	1292	{
1053	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1293	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1054	evtimer_stop (w);	1294	ev_timer_stop (w);
1055	evtimer_start (w);	1295	ev_timer_start (w);
1056	}	1296	}
1057		1297
1058	static void	1298	static void
1059	scb (struct ev_signal *w, int revents)	1299	scb (struct ev_signal *w, int revents)
1060	{	1300	{
1061	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1301	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1062	evio_stop (&wio);	1302	ev_io_stop (&wio);
1063	evio_start (&wio);	1303	ev_io_start (&wio);
1064	}	1304	}
1065		1305
1066	static void	1306	static void
1067	gcb (struct ev_signal *w, int revents)	1307	gcb (struct ev_signal *w, int revents)
1068	{	1308	{
…		…
1072		1312
1073	int main (void)	1313	int main (void)
1074	{	1314	{
1075	ev_init (0);	1315	ev_init (0);
1076		1316
1077	evio_init (&wio, sin_cb, 0, EV_READ);	1317	ev_io_init (&wio, sin_cb, 0, EV_READ);
1078	evio_start (&wio);	1318	ev_io_start (&wio);
1079		1319
1080	struct ev_timer t[10000];	1320	struct ev_timer t[10000];
1081		1321
1082	#if 0	1322	#if 0
1083	int i;	1323	int i;
1084	for (i = 0; i < 10000; ++i)	1324	for (i = 0; i < 10000; ++i)
1085	{	1325	{
1086	struct ev_timer *w = t + i;	1326	struct ev_timer *w = t + i;
1087	evw_init (w, ocb, i);	1327	ev_watcher_init (w, ocb, i);
1088	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);	1328	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1089	evtimer_start (w);	1329	ev_timer_start (w);
1090	if (drand48 () < 0.5)	1330	if (drand48 () < 0.5)
1091	evtimer_stop (w);	1331	ev_timer_stop (w);
1092	}	1332	}
1093	#endif	1333	#endif
1094		1334
1095	struct ev_timer t1;	1335	struct ev_timer t1;
1096	evtimer_init (&t1, ocb, 5, 10);	1336	ev_timer_init (&t1, ocb, 5, 10);
1097	evtimer_start (&t1);	1337	ev_timer_start (&t1);
1098		1338
1099	struct ev_signal sig;	1339	struct ev_signal sig;
1100	evsignal_init (&sig, scb, SIGQUIT);	1340	ev_signal_init (&sig, scb, SIGQUIT);
1101	evsignal_start (&sig);	1341	ev_signal_start (&sig);
1102		1342
1103	struct ev_check cw;	1343	struct ev_check cw;
1104	evcheck_init (&cw, gcb);	1344	ev_check_init (&cw, gcb);
1105	evcheck_start (&cw);	1345	ev_check_start (&cw);
1106		1346
1107	struct ev_idle iw;	1347	struct ev_idle iw;
1108	evidle_init (&iw, gcb);	1348	ev_idle_init (&iw, gcb);
1109	evidle_start (&iw);	1349	ev_idle_start (&iw);
1110		1350
1111	ev_loop (0);	1351	ev_loop (0);
1112		1352
1113	return 0;	1353	return 0;
1114	}	1354	}

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Comparing libev/ev.c (file contents): Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs. Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.27 by root, Wed Oct 31 22:16:36 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC