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

Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	32	# include "config.h"
31	#endif	33	#endif
32		34
33	#include <math.h>	35	#include <math.h>
34	#include <stdlib.h>	36	#include <stdlib.h>
…		…
40	#include <stdio.h>	42	#include <stdio.h>
41		43
42	#include <assert.h>	44	#include <assert.h>
43	#include <errno.h>	45	#include <errno.h>
44	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
45	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
46	#include <sys/time.h>	50	#include <sys/time.h>
47	#include <time.h>	51	#include <time.h>
48		52
		53	/**/
		54
49	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	57	#endif
54		58
55	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
57	#endif	61	#endif
58		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
59	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
61	#endif	69	#endif
62		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
63	#ifndef CLOCK_REALTIME	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	88	# define EV_USE_REALTIME 0
65	#endif	89	#endif
66	#ifndef EV_USE_REALTIME	90
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	91	/**/
68	#endif
69		92
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
74		97
75	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		113
77	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
80		117
81	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84
85	static int have_monotonic; /* runtime */
86
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		119
91	/*****************************************************************************/	120	/*****************************************************************************/
92		121
93	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
94	ev_time (void)	156	ev_time (void)
95	{	157	{
96	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
97	struct timespec ts;	159	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	166	#endif
105	}	167	}
106		168
107	static ev_tstamp	169	inline ev_tstamp
108	get_clock (void)	170	get_clock (void)
109	{	171	{
110	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
111	if (have_monotonic)	173	if (expect_true (have_monotonic))
112	{	174	{
113	struct timespec ts;	175	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	178	}
117	#endif	179	#endif
118		180
119	return ev_time ();	181	return ev_time ();
120	}	182	}
121		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
122	#define array_roundsize(base,n) ((n) \| 4 & ~3)	190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
123		191
124	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
126	{ \	194	{ \
127	int newcnt = cur; \	195	int newcnt = cur; \
128	do \	196	do \
129	{ \	197	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	204	cur = newcnt; \
137	}	205	}
138		206
139	/*****************************************************************************/	207	/*****************************************************************************/
140		208
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150
151	static void	209	static void
152	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
153	{	211	{
154	while (count--)	212	while (count--)
155	{	213	{
…		…
159		217
160	++base;	218	++base;
161	}	219	}
162	}	220	}
163		221
164	typedef struct
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void	222	static void
174	event (W w, int events)	223	event (EV_P_ W w, int events)
175	{	224	{
176	if (w->pending)	225	if (w->pending)
177	{	226	{
178	pendings [w->pending - 1].events \|= events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
179	return;	228	return;
180	}	229	}
181		230
182	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
184	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	235	}
187		236
188	static void	237	static void
189	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	239	{
191	int i;	240	int i;
192		241
193	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	243	event (EV_A_ events [i], type);
195	}	244	}
196		245
197	static void	246	static void
198	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
199	{	248	{
200	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	250	struct ev_io *w;
202		251
203	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
204	{	253	{
205	int ev = w->events & events;	254	int ev = w->events & events;
206		255
207	if (ev)	256	if (ev)
208	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
209	}	258	}
210	}	259	}
211		260
212	/*****************************************************************************/	261	/*****************************************************************************/
213		262
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	263	static void
218	fd_reify (void)	264	fd_reify (EV_P)
219	{	265	{
220	int i;	266	int i;
221		267
222	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
223	{	269	{
…		…
225	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	272	struct ev_io *w;
227		273
228	int events = 0;	274	int events = 0;
229		275
230	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
231	events \|= w->events;	277	events \|= w->events;
232		278
233	anfd->reify = 0;	279	anfd->reify = 0;
234		280
235	if (anfd->events != events)	281	if (anfd->events != events)
236	{	282	{
237	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	284	anfd->events = events;
239	}	285	}
240	}	286	}
241		287
242	fdchangecnt = 0;	288	fdchangecnt = 0;
243	}	289	}
244		290
245	static void	291	static void
246	fd_change (int fd)	292	fd_change (EV_P_ int fd)
247	{	293	{
248	if (anfds [fd].reify \|\| fdchangecnt < 0)	294	if (anfds [fd].reify \|\| fdchangecnt < 0)
249	return;	295	return;
250		296
251	anfds [fd].reify = 1;	297	anfds [fd].reify = 1;
…		…
253	++fdchangecnt;	299	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
255	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
256	}	302	}
257		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
258	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
259	static void	317	static void
260	fd_recheck (void)	318	fd_ebadf (EV_P)
261	{	319	{
262	int fd;	320	int fd;
263		321
264	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	323	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
267	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)
268	{	336	{
269	ev_io_stop (anfds [fd].head);	337	close (fd);
270	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	338	fd_kill (EV_A_ fd);
		339	return;
271	}	340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
272	}	356	}
273		357
274	/*****************************************************************************/	358	/*****************************************************************************/
275		359
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	360	static void
283	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
284	{	362	{
285	WT w = timers [k];	363	WT w = heap [k];
286		364
287	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
288	{	366	{
289	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
291	k >>= 1;	369	k >>= 1;
292	}	370	}
293		371
294	timers [k] = w;	372	heap [k] = w;
295	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
296		374
297	}	375	}
298		376
299	static void	377	static void
300	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
301	{	379	{
302	WT w = timers [k];	380	WT w = heap [k];
303		381
304	while (k < (N >> 1))	382	while (k < (N >> 1))
305	{	383	{
306	int j = k << 1;	384	int j = k << 1;
307		385
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	387	++j;
310		388
311	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
312	break;	390	break;
313		391
314	timers [k] = timers [j];	392	heap [k] = heap [j];
315	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
316	k = j;	394	k = j;
317	}	395	}
318		396
319	timers [k] = w;	397	heap [k] = w;
320	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
321	}	399	}
322		400
323	/*****************************************************************************/	401	/*****************************************************************************/
324		402
325	typedef struct	403	typedef struct
326	{	404	{
327	struct ev_signal *head;	405	struct ev_watcher_list *head;
328	sig_atomic_t volatile gotsig;	406	sig_atomic_t volatile gotsig;
329	} ANSIG;	407	} ANSIG;
330		408
331	static ANSIG *signals;	409	static ANSIG *signals;
332	static int signalmax;	410	static int signalmax;
333		411
334	static int sigpipe [2];	412	static int sigpipe [2];
335	static sig_atomic_t volatile gotsig;	413	static sig_atomic_t volatile gotsig;
336	static struct ev_io sigev;
337		414
338	static void	415	static void
339	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
340	{	417	{
341	while (count--)	418	while (count--)
…		…
352	{	429	{
353	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
354		431
355	if (!gotsig)	432	if (!gotsig)
356	{	433	{
		434	int old_errno = errno;
357	gotsig = 1;	435	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
359	}	438	}
360	}	439	}
361		440
362	static void	441	static void
363	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	443	{
365	struct ev_signal *w;	444	struct ev_watcher_list *w;
366	int sig;	445	int signum;
367		446
368	read (sigpipe [0], &revents, 1);	447	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	448	gotsig = 0;
370		449
371	for (sig = signalmax; sig--; )	450	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	451	if (signals [signum].gotsig)
373	{	452	{
374	signals [sig].gotsig = 0;	453	signals [signum].gotsig = 0;
375		454
376	for (w = signals [sig].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
378	}	457	}
379	}	458	}
380		459
381	static void	460	static void
382	siginit (void)	461	siginit (EV_P)
383	{	462	{
		463	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		466
387	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
390		471
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	475	}
394		476
395	/*****************************************************************************/	477	/*****************************************************************************/
396		478
397	static struct ev_idle **idles;	479	#ifndef WIN32
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407
408	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;
410		480
411	#ifndef WCONTINUED	481	#ifndef WCONTINUED
412	# define WCONTINUED 0	482	# define WCONTINUED 0
413	#endif	483	#endif
414		484
415	static void	485	static void
416	childcb (struct ev_signal *sw, int revents)	486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	487	{
418	struct ev_child *w;	488	struct ev_child *w;
		489
		490	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		491	if (w->pid == pid \|\| !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it now */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
419	int pid, status;	503	int pid, status;
420		504
421	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	505	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	506	{
423	if (w->pid == pid \|\| w->pid == -1)	507	/* make sure we are called again until all childs have been reaped */
424	{	508	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	509
426	event ((W)w, EV_CHILD);	510	child_reap (EV_A_ sw, pid, pid, status);
427	}	511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
428	}	513	}
		514
		515	#endif
429		516
430	/*****************************************************************************/	517	/*****************************************************************************/
431		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
432	#if EV_USE_EPOLL	522	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	523	# include "ev_epoll.c"
434	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
435	#if EV_USE_SELECT	528	#if EV_USE_SELECT
436	# include "ev_select.c"	529	# include "ev_select.c"
437	#endif	530	#endif
438		531
439	int	532	int
…		…
446	ev_version_minor (void)	539	ev_version_minor (void)
447	{	540	{
448	return EV_VERSION_MINOR;	541	return EV_VERSION_MINOR;
449	}	542	}
450		543
451	int ev_init (int flags)	544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
452	{	547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	\|\| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
453	if (!ev_method)	565	if (!method)
454	{	566	{
455	#if EV_USE_MONOTONIC	567	#if EV_USE_MONOTONIC
456	{	568	{
457	struct timespec ts;	569	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	571	have_monotonic = 1;
460	}	572	}
461	#endif	573	#endif
462		574
463	ev_now = ev_time ();	575	rt_now = ev_time ();
464	now = get_clock ();	576	mn_now = get_clock ();
		577	now_floor = mn_now;
465	diff = ev_now - now;	578	rtmn_diff = rt_now - mn_now;
466		579
467	if (pipe (sigpipe))	580	if (methods == EVMETHOD_AUTO)
468	return 0;	581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
470	ev_method = EVMETHOD_NONE;	584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
471	#if EV_USE_EPOLL	590	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
473	#endif	595	#endif
474	#if EV_USE_SELECT	596	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	598	#endif
		599	}
		600	}
477		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/TODO/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/TODO/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
		676	if (pipe (sigpipe))
		677	return 0;
		678
		679	if (!default_loop)
		680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
478	if (ev_method)	689	if (ev_method (EV_A))
479	{	690	{
480	ev_watcher_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
481	siginit ();	693	siginit (EV_A);
482		694
		695	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	696	ev_signal_init (&childev, childcb, SIGCHLD);
		697	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	698	ev_signal_start (EV_A_ &childev);
		699	ev_unref (EV_A); /* child watcher should not keep loop alive */
		700	#endif
485	}	701	}
		702	else
		703	default_loop = 0;
486	}	704	}
487		705
488	return ev_method;	706	return default_loop;
489	}	707	}
490		708
491	/*****************************************************************************/
492
493	void	709	void
494	ev_fork_prepare (void)	710	ev_default_destroy (void)
495	{	711	{
496	/* nop */	712	#if EV_MULTIPLICITY
497	}	713	struct ev_loop *loop = default_loop;
498
499	void
500	ev_fork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_fork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif	714	#endif
512		715
		716	ev_ref (EV_A); /* child watcher */
		717	ev_signal_stop (EV_A_ &childev);
		718
		719	ev_ref (EV_A); /* signal watcher */
513	ev_io_stop (&sigev);	720	ev_io_stop (EV_A_ &sigev);
		721
		722	close (sigpipe [0]); sigpipe [0] = 0;
		723	close (sigpipe [1]); sigpipe [1] = 0;
		724
		725	loop_destroy (EV_A);
		726	}
		727
		728	void
		729	ev_default_fork (EV_P)
		730	{
		731	loop_fork (EV_A);
		732
		733	ev_io_stop (EV_A_ &sigev);
514	close (sigpipe [0]);	734	close (sigpipe [0]);
515	close (sigpipe [1]);	735	close (sigpipe [1]);
516	pipe (sigpipe);	736	pipe (sigpipe);
		737
		738	ev_ref (EV_A); /* signal watcher */
517	siginit ();	739	siginit (EV_A);
518	}	740	}
519		741
520	/*****************************************************************************/	742	/*****************************************************************************/
521		743
522	static void	744	static void
523	call_pending (void)	745	call_pending (EV_P)
524	{	746	{
		747	int pri;
		748
		749	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	750	while (pendingcnt [pri])
526	{	751	{
527	ANPENDING *p = pendings + --pendingcnt;	752	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		753
529	if (p->w)	754	if (p->w)
530	{	755	{
531	p->w->pending = 0;	756	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	757	p->w->cb (EV_A_ p->w, p->events);
533	}	758	}
534	}	759	}
535	}	760	}
536		761
537	static void	762	static void
538	timers_reify (void)	763	timers_reify (EV_P)
539	{	764	{
540	while (timercnt && timers [0]->at <= now)	765	while (timercnt && timers [0]->at <= mn_now)
541	{	766	{
542	struct ev_timer *w = timers [0];	767	struct ev_timer *w = timers [0];
543		768
544	/* first reschedule or stop timer */	769	/* first reschedule or stop timer */
545	if (w->repeat)	770	if (w->repeat)
546	{	771	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	772	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	773	w->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	774	downheap ((WT *)timers, timercnt, 0);
550	}	775	}
551	else	776	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	777	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		778
554	event ((W)w, EV_TIMEOUT);	779	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	780	}
556	}	781	}
557		782
558	static void	783	static void
559	periodics_reify (void)	784	periodics_reify (EV_P)
560	{	785	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	786	while (periodiccnt && periodics [0]->at <= rt_now)
562	{	787	{
563	struct ev_periodic *w = periodics [0];	788	struct ev_periodic *w = periodics [0];
564		789
565	/* first reschedule or stop timer */	790	/* first reschedule or stop timer */
566	if (w->interval)	791	if (w->interval)
567	{	792	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	793	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	794	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	795	downheap ((WT *)periodics, periodiccnt, 0);
571	}	796	}
572	else	797	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	798	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		799
575	event ((W)w, EV_PERIODIC);	800	event (EV_A_ (W)w, EV_PERIODIC);
576	}	801	}
577	}	802	}
578		803
579	static void	804	static void
580	periodics_reschedule (ev_tstamp diff)	805	periodics_reschedule (EV_P)
581	{	806	{
582	int i;	807	int i;
583		808
584	/* adjust periodics after time jump */	809	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	810	for (i = 0; i < periodiccnt; ++i)
586	{	811	{
587	struct ev_periodic *w = periodics [i];	812	struct ev_periodic *w = periodics [i];
588		813
589	if (w->interval)	814	if (w->interval)
590	{	815	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	816	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
592		817
593	if (fabs (diff) >= 1e-4)	818	if (fabs (diff) >= 1e-4)
594	{	819	{
595	ev_periodic_stop (w);	820	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	821	ev_periodic_start (EV_A_ w);
597		822
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	823	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	824	}
600	}	825	}
601	}	826	}
602	}	827	}
603		828
		829	inline int
		830	time_update_monotonic (EV_P)
		831	{
		832	mn_now = get_clock ();
		833
		834	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		835	{
		836	rt_now = rtmn_diff + mn_now;
		837	return 0;
		838	}
		839	else
		840	{
		841	now_floor = mn_now;
		842	rt_now = ev_time ();
		843	return 1;
		844	}
		845	}
		846
604	static void	847	static void
605	time_update (void)	848	time_update (EV_P)
606	{	849	{
607	int i;	850	int i;
608		851
609	ev_now = ev_time ();	852	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	853	if (expect_true (have_monotonic))
612	{	854	{
613	ev_tstamp odiff = diff;	855	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	856	{
617	now = get_clock ();	857	ev_tstamp odiff = rtmn_diff;
		858
		859	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		860	{
618	diff = ev_now - now;	861	rtmn_diff = rt_now - mn_now;
619		862
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	863	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	864	return; /* all is well */
622		865
623	ev_now = ev_time ();	866	rt_now = ev_time ();
		867	mn_now = get_clock ();
		868	now_floor = mn_now;
		869	}
		870
		871	periodics_reschedule (EV_A);
		872	/* no timer adjustment, as the monotonic clock doesn't jump */
		873	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
624	}	874	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	875	}
629	else	876	else
		877	#endif
630	{	878	{
631	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	879	rt_now = ev_time ();
		880
		881	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
632	{	882	{
633	periodics_reschedule (ev_now - now);	883	periodics_reschedule (EV_A);
634		884
635	/* adjust timers. this is easy, as the offset is the same for all */	885	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	886	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	887	timers [i]->at += rt_now - mn_now;
638	}	888	}
639		889
640	now = ev_now;	890	mn_now = rt_now;
641	}	891	}
642	}	892	}
643		893
644	int ev_loop_done;	894	void
		895	ev_ref (EV_P)
		896	{
		897	++activecnt;
		898	}
645		899
		900	void
		901	ev_unref (EV_P)
		902	{
		903	--activecnt;
		904	}
		905
		906	static int loop_done;
		907
		908	void
646	void ev_loop (int flags)	909	ev_loop (EV_P_ int flags)
647	{	910	{
648	double block;	911	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	912	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
650		913
651	do	914	do
652	{	915	{
653	/* queue check watchers (and execute them) */	916	/* queue check watchers (and execute them) */
654	if (preparecnt)	917	if (expect_false (preparecnt))
655	{	918	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	919	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	920	call_pending (EV_A);
658	}	921	}
659		922
660	/* update fd-related kernel structures */	923	/* update fd-related kernel structures */
661	fd_reify ();	924	fd_reify (EV_A);
662		925
663	/* calculate blocking time */	926	/* calculate blocking time */
664		927
665	/* we only need this for !monotonic clockor timers, but as we basically	928	/* we only need this for !monotonic clockor timers, but as we basically
666	always have timers, we just calculate it always */	929	always have timers, we just calculate it always */
		930	#if EV_USE_MONOTONIC
		931	if (expect_true (have_monotonic))
		932	time_update_monotonic (EV_A);
		933	else
		934	#endif
		935	{
667	ev_now = ev_time ();	936	rt_now = ev_time ();
		937	mn_now = rt_now;
		938	}
668		939
669	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	940	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
670	block = 0.;	941	block = 0.;
671	else	942	else
672	{	943	{
673	block = MAX_BLOCKTIME;	944	block = MAX_BLOCKTIME;
674		945
675	if (timercnt)	946	if (timercnt)
676	{	947	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	948	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
678	if (block > to) block = to;	949	if (block > to) block = to;
679	}	950	}
680		951
681	if (periodiccnt)	952	if (periodiccnt)
682	{	953	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	954	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
684	if (block > to) block = to;	955	if (block > to) block = to;
685	}	956	}
686		957
687	if (block < 0.) block = 0.;	958	if (block < 0.) block = 0.;
688	}	959	}
689		960
690	method_poll (block);	961	method_poll (EV_A_ block);
691		962
692	/* update ev_now, do magic */	963	/* update rt_now, do magic */
693	time_update ();	964	time_update (EV_A);
694		965
695	/* queue pending timers and reschedule them */	966	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	967	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	968	periodics_reify (EV_A); /* absolute timers called first */
698		969
699	/* queue idle watchers unless io or timers are pending */	970	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	971	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	972	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		973
703	/* queue check watchers, to be executed first */	974	/* queue check watchers, to be executed first */
704	if (checkcnt)	975	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	976	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		977
707	call_pending ();	978	call_pending (EV_A);
708	}	979	}
709	while (!ev_loop_done);	980	while (activecnt && !loop_done);
710		981
711	if (ev_loop_done != 2)	982	if (loop_done != 2)
712	ev_loop_done = 0;	983	loop_done = 0;
		984	}
		985
		986	void
		987	ev_unloop (EV_P_ int how)
		988	{
		989	loop_done = how;
713	}	990	}
714		991
715	/*****************************************************************************/	992	/*****************************************************************************/
716		993
717	static void	994	inline void
718	wlist_add (WL *head, WL elem)	995	wlist_add (WL *head, WL elem)
719	{	996	{
720	elem->next = *head;	997	elem->next = *head;
721	*head = elem;	998	*head = elem;
722	}	999	}
723		1000
724	static void	1001	inline void
725	wlist_del (WL *head, WL elem)	1002	wlist_del (WL *head, WL elem)
726	{	1003	{
727	while (*head)	1004	while (*head)
728	{	1005	{
729	if (*head == elem)	1006	if (*head == elem)
…		…
734		1011
735	head = &(*head)->next;	1012	head = &(*head)->next;
736	}	1013	}
737	}	1014	}
738		1015
739	static void	1016	inline void
740	ev_clear_pending (W w)	1017	ev_clear_pending (EV_P_ W w)
741	{	1018	{
742	if (w->pending)	1019	if (w->pending)
743	{	1020	{
744	pendings [w->pending - 1].w = 0;	1021	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1022	w->pending = 0;
746	}	1023	}
747	}	1024	}
748		1025
749	static void	1026	inline void
750	ev_start (W w, int active)	1027	ev_start (EV_P_ W w, int active)
751	{	1028	{
		1029	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1030	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1031
752	w->active = active;	1032	w->active = active;
		1033	ev_ref (EV_A);
753	}	1034	}
754		1035
755	static void	1036	inline void
756	ev_stop (W w)	1037	ev_stop (EV_P_ W w)
757	{	1038	{
		1039	ev_unref (EV_A);
758	w->active = 0;	1040	w->active = 0;
759	}	1041	}
760		1042
761	/*****************************************************************************/	1043	/*****************************************************************************/
762		1044
763	void	1045	void
764	ev_io_start (struct ev_io *w)	1046	ev_io_start (EV_P_ struct ev_io *w)
765	{	1047	{
		1048	int fd = w->fd;
		1049
766	if (ev_is_active (w))	1050	if (ev_is_active (w))
767	return;	1051	return;
768		1052
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1053	assert (("ev_io_start called with negative fd", fd >= 0));
772		1054
773	ev_start ((W)w, 1);	1055	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1056	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1057	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1058
777	fd_change (fd);	1059	fd_change (EV_A_ fd);
778	}	1060	}
779		1061
780	void	1062	void
781	ev_io_stop (struct ev_io *w)	1063	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1064	{
783	ev_clear_pending ((W)w);	1065	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1066	if (!ev_is_active (w))
785	return;	1067	return;
786		1068
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1069	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1070	ev_stop (EV_A_ (W)w);
789		1071
790	fd_change (w->fd);	1072	fd_change (EV_A_ w->fd);
791	}	1073	}
792		1074
793	void	1075	void
794	ev_timer_start (struct ev_timer *w)	1076	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1077	{
796	if (ev_is_active (w))	1078	if (ev_is_active (w))
797	return;	1079	return;
798		1080
799	w->at += now;	1081	w->at += mn_now;
800		1082
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1083	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1084
803	ev_start ((W)w, ++timercnt);	1085	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1086	array_needsize (timers, timermax, timercnt, );
805	timers [timercnt - 1] = w;	1087	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1088	upheap ((WT *)timers, timercnt - 1);
807	}	1089	}
808		1090
809	void	1091	void
810	ev_timer_stop (struct ev_timer *w)	1092	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1093	{
812	ev_clear_pending ((W)w);	1094	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1095	if (!ev_is_active (w))
814	return;	1096	return;
815		1097
816	if (w->active < timercnt--)	1098	if (w->active < timercnt--)
817	{	1099	{
…		…
819	downheap ((WT *)timers, timercnt, w->active - 1);	1101	downheap ((WT *)timers, timercnt, w->active - 1);
820	}	1102	}
821		1103
822	w->at = w->repeat;	1104	w->at = w->repeat;
823		1105
824	ev_stop ((W)w);	1106	ev_stop (EV_A_ (W)w);
825	}	1107	}
826		1108
827	void	1109	void
828	ev_timer_again (struct ev_timer *w)	1110	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1111	{
830	if (ev_is_active (w))	1112	if (ev_is_active (w))
831	{	1113	{
832	if (w->repeat)	1114	if (w->repeat)
833	{	1115	{
834	w->at = now + w->repeat;	1116	w->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1117	downheap ((WT *)timers, timercnt, w->active - 1);
836	}	1118	}
837	else	1119	else
838	ev_timer_stop (w);	1120	ev_timer_stop (EV_A_ w);
839	}	1121	}
840	else if (w->repeat)	1122	else if (w->repeat)
841	ev_timer_start (w);	1123	ev_timer_start (EV_A_ w);
842	}	1124	}
843		1125
844	void	1126	void
845	ev_periodic_start (struct ev_periodic *w)	1127	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1128	{
847	if (ev_is_active (w))	1129	if (ev_is_active (w))
848	return;	1130	return;
849		1131
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1132	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1133
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1134	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)	1135	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1136	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
855		1137
856	ev_start ((W)w, ++periodiccnt);	1138	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1139	array_needsize (periodics, periodicmax, periodiccnt, );
858	periodics [periodiccnt - 1] = w;	1140	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1141	upheap ((WT *)periodics, periodiccnt - 1);
860	}	1142	}
861		1143
862	void	1144	void
863	ev_periodic_stop (struct ev_periodic *w)	1145	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1146	{
865	ev_clear_pending ((W)w);	1147	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1148	if (!ev_is_active (w))
867	return;	1149	return;
868		1150
869	if (w->active < periodiccnt--)	1151	if (w->active < periodiccnt--)
870	{	1152	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1153	periodics [w->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1154	downheap ((WT *)periodics, periodiccnt, w->active - 1);
873	}	1155	}
874		1156
875	ev_stop ((W)w);	1157	ev_stop (EV_A_ (W)w);
876	}	1158	}
877		1159
878	void	1160	void
879	ev_signal_start (struct ev_signal *w)	1161	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1162	{
881	if (ev_is_active (w))	1163	if (ev_is_active (w))
882	return;	1164	return;
883		1165
		1166	ev_start (EV_A_ (W)w, ++idlecnt);
		1167	array_needsize (idles, idlemax, idlecnt, );
		1168	idles [idlecnt - 1] = w;
		1169	}
		1170
		1171	void
		1172	ev_idle_stop (EV_P_ struct ev_idle *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (ev_is_active (w))
		1176	return;
		1177
		1178	idles [w->active - 1] = idles [--idlecnt];
		1179	ev_stop (EV_A_ (W)w);
		1180	}
		1181
		1182	void
		1183	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1184	{
		1185	if (ev_is_active (w))
		1186	return;
		1187
		1188	ev_start (EV_A_ (W)w, ++preparecnt);
		1189	array_needsize (prepares, preparemax, preparecnt, );
		1190	prepares [preparecnt - 1] = w;
		1191	}
		1192
		1193	void
		1194	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1195	{
		1196	ev_clear_pending (EV_A_ (W)w);
		1197	if (ev_is_active (w))
		1198	return;
		1199
		1200	prepares [w->active - 1] = prepares [--preparecnt];
		1201	ev_stop (EV_A_ (W)w);
		1202	}
		1203
		1204	void
		1205	ev_check_start (EV_P_ struct ev_check *w)
		1206	{
		1207	if (ev_is_active (w))
		1208	return;
		1209
		1210	ev_start (EV_A_ (W)w, ++checkcnt);
		1211	array_needsize (checks, checkmax, checkcnt, );
		1212	checks [checkcnt - 1] = w;
		1213	}
		1214
		1215	void
		1216	ev_check_stop (EV_P_ struct ev_check *w)
		1217	{
		1218	ev_clear_pending (EV_A_ (W)w);
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	checks [w->active - 1] = checks [--checkcnt];
		1223	ev_stop (EV_A_ (W)w);
		1224	}
		1225
		1226	#ifndef SA_RESTART
		1227	# define SA_RESTART 0
		1228	#endif
		1229
		1230	void
		1231	ev_signal_start (EV_P_ struct ev_signal *w)
		1232	{
		1233	#if EV_MULTIPLICITY
		1234	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1235	#endif
		1236	if (ev_is_active (w))
		1237	return;
		1238
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1239	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1240
886	ev_start ((W)w, 1);	1241	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1242	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1243	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1244
890	if (!w->next)	1245	if (!w->next)
891	{	1246	{
892	struct sigaction sa;	1247	struct sigaction sa;
893	sa.sa_handler = sighandler;	1248	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1249	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1250	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1251	sigaction (w->signum, &sa, 0);
897	}	1252	}
898	}	1253	}
899		1254
900	void	1255	void
901	ev_signal_stop (struct ev_signal *w)	1256	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1257	{
903	ev_clear_pending ((W)w);	1258	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1259	if (!ev_is_active (w))
905	return;	1260	return;
906		1261
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1262	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1263	ev_stop (EV_A_ (W)w);
909		1264
910	if (!signals [w->signum - 1].head)	1265	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1266	signal (w->signum, SIG_DFL);
912	}	1267	}
913		1268
914	void	1269	void
915	ev_idle_start (struct ev_idle *w)	1270	ev_child_start (EV_P_ struct ev_child *w)
916	{	1271	{
		1272	#if EV_MULTIPLICITY
		1273	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1274	#endif
917	if (ev_is_active (w))	1275	if (ev_is_active (w))
918	return;	1276	return;
919		1277
920	ev_start ((W)w, ++idlecnt);	1278	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1279	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1280	}
924		1281
925	void	1282	void
926	ev_idle_stop (struct ev_idle *w)	1283	ev_child_stop (EV_P_ struct ev_child *w)
927	{	1284	{
928	ev_clear_pending ((W)w);	1285	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1286	if (ev_is_active (w))
930	return;	1287	return;
931		1288
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)
982	{
983	if (ev_is_active (w))
984	return;
985
986	ev_start ((W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}
989
990	void
991	ev_child_stop (struct ev_child *w)
992	{
993	ev_clear_pending ((W)w);
994	if (ev_is_active (w))
995	return;
996
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1289	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1290	ev_stop (EV_A_ (W)w);
999	}	1291	}
1000		1292
1001	/*****************************************************************************/	1293	/*****************************************************************************/
1002		1294
1003	struct ev_once	1295	struct ev_once
…		…
1007	void (cb)(int revents, void arg);	1299	void (cb)(int revents, void arg);
1008	void *arg;	1300	void *arg;
1009	};	1301	};
1010		1302
1011	static void	1303	static void
1012	once_cb (struct ev_once *once, int revents)	1304	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1305	{
1014	void (cb)(int revents, void arg) = once->cb;	1306	void (cb)(int revents, void arg) = once->cb;
1015	void *arg = once->arg;	1307	void *arg = once->arg;
1016		1308
1017	ev_io_stop (&once->io);	1309	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1310	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1311	free (once);
1020		1312
1021	cb (revents, arg);	1313	cb (revents, arg);
1022	}	1314	}
1023		1315
1024	static void	1316	static void
1025	once_cb_io (struct ev_io *w, int revents)	1317	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1318	{
1027	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1319	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1028	}	1320	}
1029		1321
1030	static void	1322	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1323	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1324	{
1033	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1325	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1034	}	1326	}
1035		1327
1036	void	1328	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1329	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1038	{	1330	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1331	struct ev_once *once = malloc (sizeof (struct ev_once));
1040		1332
1041	if (!once)	1333	if (!once)
1042	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1334	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1047		1339
1048	ev_watcher_init (&once->io, once_cb_io);	1340	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1341	if (fd >= 0)
1050	{	1342	{
1051	ev_io_set (&once->io, fd, events);	1343	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1344	ev_io_start (EV_A_ &once->io);
1053	}	1345	}
1054		1346
1055	ev_watcher_init (&once->to, once_cb_to);	1347	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1348	if (timeout >= 0.)
1057	{	1349	{
1058	ev_timer_set (&once->to, timeout, 0.);	1350	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1351	ev_timer_start (EV_A_ &once->to);
1060	}	1352	}
1061	}	1353	}
1062	}	1354	}
1063		1355
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}
1141
1142	#endif
1143
1144
1145
1146

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Comparing libev/ev.c (file contents): Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs. Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.35 by root, Thu Nov 1 11:55:54 2007 UTC vs.
Revision 1.57 by root, Sun Nov 4 16:43:53 2007 UTC