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

Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC

…		…
1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		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_USE_POLL
		64	# define EV_USE_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	unsigned char wev, rev; /* want, received event set */
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140
141	static int *fdchanges;
142	static int fdchangemax, fdchangecnt;
143
144	static void	209	static void
145	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
146	{	211	{
147	while (count--)	212	while (count--)
148	{	213	{
149	base->head = 0;	214	base->head = 0;
150	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
151	++base;	218	++base;
152	}	219	}
153	}	220	}
154		221
155	typedef struct
156	{
157	W w;
158	int events;
159	} ANPENDING;
160
161	static ANPENDING *pendings;
162	static int pendingmax, pendingcnt;
163
164	static void	222	static void
165	event (W w, int events)	223	event (EV_P_ W w, int events)
166	{	224	{
167	if (w->active)	225	if (w->pending)
168	{	226	{
169	w->pending = ++pendingcnt;
170	array_needsize (pendings, pendingmax, pendingcnt, );
171	pendings [pendingcnt - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
173	}	229	}
174	}
175		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
176	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
177	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
178	{	248	{
179	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
180	struct ev_io *w;	250	struct ev_io *w;
181		251
182	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
183	{	253	{
184	int ev = w->events & events;	254	int ev = w->events & events;
185		255
186	if (ev)	256	if (ev)
187	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
188	}	258	}
189	}	259	}
190		260
		261	/*****************************************************************************/
		262
191	static void	263	static void
192	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
193	{	265	{
194	int i;	266	int i;
195		267
196	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
197	event (events [i], type);	269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		277	events \|= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify \|\| fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		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	}
198	}	314	}
199		315
200	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
201	static void	317	static void
202	fd_recheck ()	318	fd_ebadf (EV_P)
203	{	319	{
204	int fd;	320	int fd;
205		321
206	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
207	if (anfds [fd].wev)	323	if (anfds [fd].events)
208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
209	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
210	evio_stop (anfds [fd].head);	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)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
		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	}
211	}	356	}
212		357
213	/*****************************************************************************/	358	/*****************************************************************************/
214		359
215	static struct ev_timer **timers;
216	static int timermax, timercnt;
217
218	static struct ev_periodic **periodics;
219	static int periodicmax, periodiccnt;
220
221	static void	360	static void
222	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
223	{	362	{
224	WT w = timers [k];	363	WT w = heap [k];
225		364
226	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
227	{	366	{
228	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
229	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
230	k >>= 1;	369	k >>= 1;
231	}	370	}
232		371
233	timers [k] = w;	372	heap [k] = w;
234	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
235		374
236	}	375	}
237		376
238	static void	377	static void
239	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
240	{	379	{
241	WT w = timers [k];	380	WT w = heap [k];
242		381
243	while (k < (N >> 1))	382	while (k < (N >> 1))
244	{	383	{
245	int j = k << 1;	384	int j = k << 1;
246		385
247	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
248	++j;	387	++j;
249		388
250	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
251	break;	390	break;
252		391
253	timers [k] = timers [j];	392	heap [k] = heap [j];
254	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
255	k = j;	394	k = j;
256	}	395	}
257		396
258	timers [k] = w;	397	heap [k] = w;
259	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
260	}	399	}
261		400
262	/*****************************************************************************/	401	/*****************************************************************************/
263		402
264	typedef struct	403	typedef struct
265	{	404	{
266	struct ev_signal *head;	405	struct ev_watcher_list *head;
267	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
268	} ANSIG;	407	} ANSIG;
269		408
270	static ANSIG *signals;	409	static ANSIG *signals;
271	static int signalmax;	410	static int signalmax;
272		411
273	static int sigpipe [2];	412	static int sigpipe [2];
274	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
275	static struct ev_io sigev;	414	static struct ev_io sigev;
276		415
277	static void	416	static void
278	signals_init (ANSIG *base, int count)	417	signals_init (ANSIG *base, int count)
279	{	418	{
280	while (count--)	419	while (count--)
281	{	420	{
282	base->head = 0;	421	base->head = 0;
283	base->gotsig = 0;	422	base->gotsig = 0;
		423
284	++base;	424	++base;
285	}	425	}
286	}	426	}
287		427
288	static void	428	static void
…		…
290	{	430	{
291	signals [signum - 1].gotsig = 1;	431	signals [signum - 1].gotsig = 1;
292		432
293	if (!gotsig)	433	if (!gotsig)
294	{	434	{
		435	int old_errno = errno;
295	gotsig = 1;	436	gotsig = 1;
296	write (sigpipe [1], &gotsig, 1);	437	write (sigpipe [1], &signum, 1);
		438	errno = old_errno;
297	}	439	}
298	}	440	}
299		441
300	static void	442	static void
301	sigcb (struct ev_io *iow, int revents)	443	sigcb (EV_P_ struct ev_io *iow, int revents)
302	{	444	{
303	struct ev_signal *w;	445	struct ev_watcher_list *w;
304	int sig;	446	int signum;
305		447
		448	read (sigpipe [0], &revents, 1);
306	gotsig = 0;	449	gotsig = 0;
307	read (sigpipe [0], &revents, 1);
308		450
309	for (sig = signalmax; sig--; )	451	for (signum = signalmax; signum--; )
310	if (signals [sig].gotsig)	452	if (signals [signum].gotsig)
311	{	453	{
312	signals [sig].gotsig = 0;	454	signals [signum].gotsig = 0;
313		455
314	for (w = signals [sig].head; w; w = w->next)	456	for (w = signals [signum].head; w; w = w->next)
315	event ((W)w, EV_SIGNAL);	457	event (EV_A_ (W)w, EV_SIGNAL);
316	}	458	}
317	}	459	}
318		460
319	static void	461	static void
320	siginit (void)	462	siginit (EV_P)
321	{	463	{
		464	#ifndef WIN32
322	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
323	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
324		467
325	/* rather than sort out wether we really need nb, set it */	468	/* rather than sort out wether we really need nb, set it */
326	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
327	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		471	#endif
328		472
329	evio_set (&sigev, sigpipe [0], EV_READ);	473	ev_io_set (&sigev, sigpipe [0], EV_READ);
330	evio_start (&sigev);	474	ev_io_start (EV_A_ &sigev);
		475	ev_unref (EV_A); /* child watcher should not keep loop alive */
331	}	476	}
332		477
333	/*****************************************************************************/	478	/*****************************************************************************/
334		479
335	static struct ev_idle **idles;	480	#ifndef WIN32
336	static int idlemax, idlecnt;
337
338	static struct ev_prepare **prepares;
339	static int preparemax, preparecnt;
340
341	static struct ev_check **checks;
342	static int checkmax, checkcnt;
343
344	/*****************************************************************************/
345		481
346	static struct ev_child *childs [PID_HASHSIZE];	482	static struct ev_child *childs [PID_HASHSIZE];
347	static struct ev_signal childev;	483	static struct ev_signal childev;
348		484
349	#ifndef WCONTINUED	485	#ifndef WCONTINUED
350	# define WCONTINUED 0	486	# define WCONTINUED 0
351	#endif	487	#endif
352		488
353	static void	489	static void
354	childcb (struct ev_signal *sw, int revents)	490	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
355	{	491	{
356	struct ev_child *w;	492	struct ev_child *w;
		493
		494	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		495	if (w->pid == pid \|\| !w->pid)
		496	{
		497	w->priority = sw->priority; /* need to do it now */
		498	w->rpid = pid;
		499	w->rstatus = status;
		500	event (EV_A_ (W)w, EV_CHILD);
		501	}
		502	}
		503
		504	static void
		505	childcb (EV_P_ struct ev_signal *sw, int revents)
		506	{
357	int pid, status;	507	int pid, status;
358		508
359	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	509	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
360	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	510	{
361	if (w->pid == pid \|\| w->pid == -1)	511	/* make sure we are called again until all childs have been reaped */
362	{	512	event (EV_A_ (W)sw, EV_SIGNAL);
363	w->status = status;	513
364	event ((W)w, EV_CHILD);	514	child_reap (EV_A_ sw, pid, pid, status);
365	}	515	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		516	}
366	}	517	}
		518
		519	#endif
367		520
368	/*****************************************************************************/	521	/*****************************************************************************/
369		522
		523	#if EV_USE_KQUEUE
		524	# include "ev_kqueue.c"
		525	#endif
370	#if HAVE_EPOLL	526	#if EV_USE_EPOLL
371	# include "ev_epoll.c"	527	# include "ev_epoll.c"
372	#endif	528	#endif
		529	#if EV_USE_POLL
		530	# include "ev_poll.c"
		531	#endif
373	#if HAVE_SELECT	532	#if EV_USE_SELECT
374	# include "ev_select.c"	533	# include "ev_select.c"
375	#endif	534	#endif
376		535
377	int ev_init (int flags)	536	int
		537	ev_version_major (void)
378	{	538	{
		539	return EV_VERSION_MAJOR;
		540	}
		541
		542	int
		543	ev_version_minor (void)
		544	{
		545	return EV_VERSION_MINOR;
		546	}
		547
		548	/* return true if we are running with elevated privileges and should ignore env variables */
		549	static int
		550	enable_secure (void)
		551	{
		552	#ifdef WIN32
		553	return 0;
		554	#else
		555	return getuid () != geteuid ()
		556	\|\| getgid () != getegid ();
		557	#endif
		558	}
		559
		560	int
		561	ev_method (EV_P)
		562	{
		563	return method;
		564	}
		565
		566	static void
		567	loop_init (EV_P_ int methods)
		568	{
379	if (!ev_method)	569	if (!method)
380	{	570	{
381	#if HAVE_MONOTONIC	571	#if EV_USE_MONOTONIC
382	{	572	{
383	struct timespec ts;	573	struct timespec ts;
384	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
385	have_monotonic = 1;	575	have_monotonic = 1;
386	}	576	}
387	#endif	577	#endif
388		578
389	ev_now = ev_time ();	579	rt_now = ev_time ();
390	now = get_clock ();	580	mn_now = get_clock ();
		581	now_floor = mn_now;
391	diff = ev_now - now;	582	rtmn_diff = rt_now - mn_now;
392		583
		584	if (methods == EVMETHOD_AUTO)
		585	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		586	methods = atoi (getenv ("LIBEV_METHODS"));
		587	else
		588	methods = EVMETHOD_ANY;
		589
		590	method = 0;
		591	#if EV_USE_KQUEUE
		592	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		593	#endif
		594	#if EV_USE_EPOLL
		595	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		596	#endif
		597	#if EV_USE_POLL
		598	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		599	#endif
		600	#if EV_USE_SELECT
		601	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		602	#endif
		603	}
		604	}
		605
		606	void
		607	loop_destroy (EV_P)
		608	{
		609	#if EV_USE_KQUEUE
		610	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		611	#endif
		612	#if EV_USE_EPOLL
		613	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		614	#endif
		615	#if EV_USE_POLL
		616	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		617	#endif
		618	#if EV_USE_SELECT
		619	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		620	#endif
		621
		622	method = 0;
		623	/TODO/
		624	}
		625
		626	void
		627	loop_fork (EV_P)
		628	{
		629	/TODO/
		630	#if EV_USE_EPOLL
		631	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		632	#endif
		633	#if EV_USE_KQUEUE
		634	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		635	#endif
		636	}
		637
		638	#if EV_MULTIPLICITY
		639	struct ev_loop *
		640	ev_loop_new (int methods)
		641	{
		642	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		643
		644	loop_init (EV_A_ methods);
		645
		646	if (ev_methods (EV_A))
		647	return loop;
		648
		649	return 0;
		650	}
		651
		652	void
		653	ev_loop_destroy (EV_P)
		654	{
		655	loop_destroy (EV_A);
		656	free (loop);
		657	}
		658
		659	void
		660	ev_loop_fork (EV_P)
		661	{
		662	loop_fork (EV_A);
		663	}
		664
		665	#endif
		666
		667	#if EV_MULTIPLICITY
		668	struct ev_loop default_loop_struct;
		669	static struct ev_loop *default_loop;
		670
		671	struct ev_loop *
		672	#else
		673	static int default_loop;
		674
		675	int
		676	#endif
		677	ev_default_loop (int methods)
		678	{
		679	if (sigpipe [0] == sigpipe [1])
393	if (pipe (sigpipe))	680	if (pipe (sigpipe))
394	return 0;	681	return 0;
395		682
396	ev_method = EVMETHOD_NONE;	683	if (!default_loop)
397	#if HAVE_EPOLL	684	{
398	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	685	#if EV_MULTIPLICITY
		686	struct ev_loop *loop = default_loop = &default_loop_struct;
		687	#else
		688	default_loop = 1;
399	#endif	689	#endif
400	#if HAVE_SELECT
401	if (ev_method == EVMETHOD_NONE) select_init (flags);
402	#endif
403		690
		691	loop_init (EV_A_ methods);
		692
404	if (ev_method)	693	if (ev_method (EV_A))
405	{	694	{
406	evw_init (&sigev, sigcb);	695	ev_watcher_init (&sigev, sigcb);
		696	ev_set_priority (&sigev, EV_MAXPRI);
407	siginit ();	697	siginit (EV_A);
408		698
		699	#ifndef WIN32
409	evsignal_init (&childev, childcb, SIGCHLD);	700	ev_signal_init (&childev, childcb, SIGCHLD);
		701	ev_set_priority (&childev, EV_MAXPRI);
410	evsignal_start (&childev);	702	ev_signal_start (EV_A_ &childev);
		703	ev_unref (EV_A); /* child watcher should not keep loop alive */
		704	#endif
411	}	705	}
		706	else
		707	default_loop = 0;
412	}	708	}
413		709
414	return ev_method;	710	return default_loop;
415	}	711	}
416		712
417	/*****************************************************************************/	713	void
418		714	ev_default_destroy (void)
419	void ev_prefork (void)
420	{	715	{
421	/* nop */	716	#if EV_MULTIPLICITY
422	}	717	struct ev_loop *loop = default_loop;
423
424	void ev_postfork_parent (void)
425	{
426	/* nop */
427	}
428
429	void ev_postfork_child (void)
430	{
431	#if HAVE_EPOLL
432	if (ev_method == EVMETHOD_EPOLL)
433	epoll_postfork_child ();
434	#endif	718	#endif
435		719
		720	ev_ref (EV_A); /* child watcher */
		721	ev_signal_stop (EV_A_ &childev);
		722
		723	ev_ref (EV_A); /* signal watcher */
436	evio_stop (&sigev);	724	ev_io_stop (EV_A_ &sigev);
		725
		726	close (sigpipe [0]); sigpipe [0] = 0;
		727	close (sigpipe [1]); sigpipe [1] = 0;
		728
		729	loop_destroy (EV_A);
		730	}
		731
		732	void
		733	ev_default_fork (EV_P)
		734	{
		735	loop_fork (EV_A);
		736
		737	ev_io_stop (EV_A_ &sigev);
437	close (sigpipe [0]);	738	close (sigpipe [0]);
438	close (sigpipe [1]);	739	close (sigpipe [1]);
439	pipe (sigpipe);	740	pipe (sigpipe);
		741
		742	ev_ref (EV_A); /* signal watcher */
440	siginit ();	743	siginit (EV_A);
441	}	744	}
442		745
443	/*****************************************************************************/	746	/*****************************************************************************/
444		747
445	static void	748	static void
446	fd_reify (void)	749	call_pending (EV_P)
447	{	750	{
448	int i;	751	int pri;
449		752
450	for (i = 0; i < fdchangecnt; ++i)	753	for (pri = NUMPRI; pri--; )
451	{	754	while (pendingcnt [pri])
452	int fd = fdchanges [i];
453	ANFD *anfd = anfds + fd;
454	struct ev_io *w;
455
456	int wev = 0;
457
458	for (w = anfd->head; w; w = w->next)
459	wev \|= w->events;
460
461	if (anfd->wev != wev)
462	{	755	{
463	method_modify (fd, anfd->wev, wev);
464	anfd->wev = wev;
465	}
466	}
467
468	fdchangecnt = 0;
469	}
470
471	static void
472	call_pending ()
473	{
474	while (pendingcnt)
475	{
476	ANPENDING *p = pendings + --pendingcnt;	756	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
477		757
478	if (p->w)	758	if (p->w)
479	{	759	{
480	p->w->pending = 0;	760	p->w->pending = 0;
481	p->w->cb (p->w, p->events);	761	p->w->cb (EV_A_ p->w, p->events);
482	}	762	}
483	}	763	}
484	}	764	}
485		765
486	static void	766	static void
487	timers_reify ()	767	timers_reify (EV_P)
488	{	768	{
489	while (timercnt && timers [0]->at <= now)	769	while (timercnt && timers [0]->at <= mn_now)
490	{	770	{
491	struct ev_timer *w = timers [0];	771	struct ev_timer *w = timers [0];
492
493	event ((W)w, EV_TIMEOUT);
494		772
495	/* first reschedule or stop timer */	773	/* first reschedule or stop timer */
496	if (w->repeat)	774	if (w->repeat)
497	{	775	{
		776	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
498	w->at = now + w->repeat;	777	w->at = mn_now + w->repeat;
499	assert (("timer timeout in the past, negative repeat?", w->at > now));
500	downheap ((WT *)timers, timercnt, 0);	778	downheap ((WT *)timers, timercnt, 0);
501	}	779	}
502	else	780	else
503	evtimer_stop (w); /* nonrepeating: stop timer */	781	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
504	}
505	}
506		782
		783	event (EV_A_ (W)w, EV_TIMEOUT);
		784	}
		785	}
		786
507	static void	787	static void
508	periodics_reify ()	788	periodics_reify (EV_P)
509	{	789	{
510	while (periodiccnt && periodics [0]->at <= ev_now)	790	while (periodiccnt && periodics [0]->at <= rt_now)
511	{	791	{
512	struct ev_periodic *w = periodics [0];	792	struct ev_periodic *w = periodics [0];
513		793
514	/* first reschedule or stop timer */	794	/* first reschedule or stop timer */
515	if (w->interval)	795	if (w->interval)
516	{	796	{
517	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	797	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
518	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	798	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
519	downheap ((WT *)periodics, periodiccnt, 0);	799	downheap ((WT *)periodics, periodiccnt, 0);
520	}	800	}
521	else	801	else
522	evperiodic_stop (w); /* nonrepeating: stop timer */	802	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
523		803
524	event ((W)w, EV_TIMEOUT);	804	event (EV_A_ (W)w, EV_PERIODIC);
525	}	805	}
526	}	806	}
527		807
528	static void	808	static void
529	periodics_reschedule (ev_tstamp diff)	809	periodics_reschedule (EV_P)
530	{	810	{
531	int i;	811	int i;
532		812
533	/* adjust periodics after time jump */	813	/* adjust periodics after time jump */
534	for (i = 0; i < periodiccnt; ++i)	814	for (i = 0; i < periodiccnt; ++i)
535	{	815	{
536	struct ev_periodic *w = periodics [i];	816	struct ev_periodic *w = periodics [i];
537		817
538	if (w->interval)	818	if (w->interval)
539	{	819	{
540	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	820	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
541		821
542	if (fabs (diff) >= 1e-4)	822	if (fabs (diff) >= 1e-4)
543	{	823	{
544	evperiodic_stop (w);	824	ev_periodic_stop (EV_A_ w);
545	evperiodic_start (w);	825	ev_periodic_start (EV_A_ w);
546		826
547	i = 0; /* restart loop, inefficient, but time jumps should be rare */	827	i = 0; /* restart loop, inefficient, but time jumps should be rare */
548	}	828	}
549	}	829	}
550	}	830	}
551	}	831	}
552		832
		833	inline int
		834	time_update_monotonic (EV_P)
		835	{
		836	mn_now = get_clock ();
		837
		838	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		839	{
		840	rt_now = rtmn_diff + mn_now;
		841	return 0;
		842	}
		843	else
		844	{
		845	now_floor = mn_now;
		846	rt_now = ev_time ();
		847	return 1;
		848	}
		849	}
		850
553	static void	851	static void
554	time_update ()	852	time_update (EV_P)
555	{	853	{
556	int i;	854	int i;
557		855
558	ev_now = ev_time ();	856	#if EV_USE_MONOTONIC
559
560	if (have_monotonic)	857	if (expect_true (have_monotonic))
561	{	858	{
562	ev_tstamp odiff = diff;	859	if (time_update_monotonic (EV_A))
563
564	for (i = 4; --i; ) /* loop a few times, before making important decisions */
565	{	860	{
566	now = get_clock ();	861	ev_tstamp odiff = rtmn_diff;
		862
		863	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		864	{
567	diff = ev_now - now;	865	rtmn_diff = rt_now - mn_now;
568		866
569	if (fabs (odiff - diff) < MIN_TIMEJUMP)	867	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
570	return; /* all is well */	868	return; /* all is well */
571		869
572	ev_now = ev_time ();	870	rt_now = ev_time ();
		871	mn_now = get_clock ();
		872	now_floor = mn_now;
		873	}
		874
		875	periodics_reschedule (EV_A);
		876	/* no timer adjustment, as the monotonic clock doesn't jump */
		877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
573	}	878	}
574
575	periodics_reschedule (diff - odiff);
576	/* no timer adjustment, as the monotonic clock doesn't jump */
577	}	879	}
578	else	880	else
		881	#endif
579	{	882	{
580	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	883	rt_now = ev_time ();
		884
		885	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
581	{	886	{
582	periodics_reschedule (ev_now - now);	887	periodics_reschedule (EV_A);
583		888
584	/* adjust timers. this is easy, as the offset is the same for all */	889	/* adjust timers. this is easy, as the offset is the same for all */
585	for (i = 0; i < timercnt; ++i)	890	for (i = 0; i < timercnt; ++i)
586	timers [i]->at += diff;	891	timers [i]->at += rt_now - mn_now;
587	}	892	}
588		893
589	now = ev_now;	894	mn_now = rt_now;
590	}	895	}
591	}	896	}
592		897
593	int ev_loop_done;	898	void
		899	ev_ref (EV_P)
		900	{
		901	++activecnt;
		902	}
594		903
		904	void
		905	ev_unref (EV_P)
		906	{
		907	--activecnt;
		908	}
		909
		910	static int loop_done;
		911
		912	void
595	void ev_loop (int flags)	913	ev_loop (EV_P_ int flags)
596	{	914	{
597	double block;	915	double block;
598	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	916	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
599		917
600	do	918	do
601	{	919	{
602	/* queue check watchers (and execute them) */	920	/* queue check watchers (and execute them) */
603	if (preparecnt)	921	if (expect_false (preparecnt))
604	{	922	{
605	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	923	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
606	call_pending ();	924	call_pending (EV_A);
607	}	925	}
608		926
609	/* update fd-related kernel structures */	927	/* update fd-related kernel structures */
610	fd_reify ();	928	fd_reify (EV_A);
611		929
612	/* calculate blocking time */	930	/* calculate blocking time */
613		931
614	/* we only need this for !monotonic clockor timers, but as we basically	932	/* we only need this for !monotonic clockor timers, but as we basically
615	always have timers, we just calculate it always */	933	always have timers, we just calculate it always */
		934	#if EV_USE_MONOTONIC
		935	if (expect_true (have_monotonic))
		936	time_update_monotonic (EV_A);
		937	else
		938	#endif
		939	{
616	ev_now = ev_time ();	940	rt_now = ev_time ();
		941	mn_now = rt_now;
		942	}
617		943
618	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	944	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
619	block = 0.;	945	block = 0.;
620	else	946	else
621	{	947	{
622	block = MAX_BLOCKTIME;	948	block = MAX_BLOCKTIME;
623		949
624	if (timercnt)	950	if (timercnt)
625	{	951	{
626	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	952	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
627	if (block > to) block = to;	953	if (block > to) block = to;
628	}	954	}
629		955
630	if (periodiccnt)	956	if (periodiccnt)
631	{	957	{
632	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	958	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
633	if (block > to) block = to;	959	if (block > to) block = to;
634	}	960	}
635		961
636	if (block < 0.) block = 0.;	962	if (block < 0.) block = 0.;
637	}	963	}
638		964
639	method_poll (block);	965	method_poll (EV_A_ block);
640		966
641	/* update ev_now, do magic */	967	/* update rt_now, do magic */
642	time_update ();	968	time_update (EV_A);
643		969
644	/* queue pending timers and reschedule them */	970	/* queue pending timers and reschedule them */
645	timers_reify (); /* relative timers called last */	971	timers_reify (EV_A); /* relative timers called last */
646	periodics_reify (); /* absolute timers called first */	972	periodics_reify (EV_A); /* absolute timers called first */
647		973
648	/* queue idle watchers unless io or timers are pending */	974	/* queue idle watchers unless io or timers are pending */
649	if (!pendingcnt)	975	if (!pendingcnt)
650	queue_events ((W *)idles, idlecnt, EV_IDLE);	976	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
651		977
652	/* queue check watchers, to be executed first */	978	/* queue check watchers, to be executed first */
653	if (checkcnt)	979	if (checkcnt)
654	queue_events ((W *)checks, checkcnt, EV_CHECK);	980	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
655		981
656	call_pending ();	982	call_pending (EV_A);
657	}	983	}
658	while (!ev_loop_done);	984	while (activecnt && !loop_done);
659		985
660	if (ev_loop_done != 2)	986	if (loop_done != 2)
661	ev_loop_done = 0;	987	loop_done = 0;
		988	}
		989
		990	void
		991	ev_unloop (EV_P_ int how)
		992	{
		993	loop_done = how;
662	}	994	}
663		995
664	/*****************************************************************************/	996	/*****************************************************************************/
665		997
666	static void	998	inline void
667	wlist_add (WL *head, WL elem)	999	wlist_add (WL *head, WL elem)
668	{	1000	{
669	elem->next = *head;	1001	elem->next = *head;
670	*head = elem;	1002	*head = elem;
671	}	1003	}
672		1004
673	static void	1005	inline void
674	wlist_del (WL *head, WL elem)	1006	wlist_del (WL *head, WL elem)
675	{	1007	{
676	while (*head)	1008	while (*head)
677	{	1009	{
678	if (*head == elem)	1010	if (*head == elem)
…		…
683		1015
684	head = &(*head)->next;	1016	head = &(*head)->next;
685	}	1017	}
686	}	1018	}
687		1019
688	static void	1020	inline void
689	ev_clear (W w)	1021	ev_clear_pending (EV_P_ W w)
690	{	1022	{
691	if (w->pending)	1023	if (w->pending)
692	{	1024	{
693	pendings [w->pending - 1].w = 0;	1025	pendings [ABSPRI (w)][w->pending - 1].w = 0;
694	w->pending = 0;	1026	w->pending = 0;
695	}	1027	}
696	}	1028	}
697		1029
698	static void	1030	inline void
699	ev_start (W w, int active)	1031	ev_start (EV_P_ W w, int active)
700	{	1032	{
		1033	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1034	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1035
701	w->active = active;	1036	w->active = active;
		1037	ev_ref (EV_A);
702	}	1038	}
703		1039
704	static void	1040	inline void
705	ev_stop (W w)	1041	ev_stop (EV_P_ W w)
706	{	1042	{
		1043	ev_unref (EV_A);
707	w->active = 0;	1044	w->active = 0;
708	}	1045	}
709		1046
710	/*****************************************************************************/	1047	/*****************************************************************************/
711		1048
712	void	1049	void
713	evio_start (struct ev_io *w)	1050	ev_io_start (EV_P_ struct ev_io *w)
714	{	1051	{
		1052	int fd = w->fd;
		1053
715	if (ev_is_active (w))	1054	if (ev_is_active (w))
716	return;	1055	return;
717		1056
718	int fd = w->fd;	1057	assert (("ev_io_start called with negative fd", fd >= 0));
719		1058
720	ev_start ((W)w, 1);	1059	ev_start (EV_A_ (W)w, 1);
721	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1060	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
722	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1061	wlist_add ((WL *)&anfds[fd].head, (WL)w);
723		1062
724	++fdchangecnt;	1063	fd_change (EV_A_ fd);
725	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
726	fdchanges [fdchangecnt - 1] = fd;
727	}	1064	}
728		1065
729	void	1066	void
730	evio_stop (struct ev_io *w)	1067	ev_io_stop (EV_P_ struct ev_io *w)
731	{	1068	{
732	ev_clear ((W)w);	1069	ev_clear_pending (EV_A_ (W)w);
733	if (!ev_is_active (w))	1070	if (!ev_is_active (w))
734	return;	1071	return;
735		1072
736	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1073	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
737	ev_stop ((W)w);	1074	ev_stop (EV_A_ (W)w);
738		1075
739	++fdchangecnt;	1076	fd_change (EV_A_ w->fd);
740	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
741	fdchanges [fdchangecnt - 1] = w->fd;
742	}	1077	}
743		1078
744	void	1079	void
745	evtimer_start (struct ev_timer *w)	1080	ev_timer_start (EV_P_ struct ev_timer *w)
746	{	1081	{
747	if (ev_is_active (w))	1082	if (ev_is_active (w))
748	return;	1083	return;
749		1084
750	w->at += now;	1085	w->at += mn_now;
751		1086
752	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1087	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
753		1088
754	ev_start ((W)w, ++timercnt);	1089	ev_start (EV_A_ (W)w, ++timercnt);
755	array_needsize (timers, timermax, timercnt, );	1090	array_needsize (timers, timermax, timercnt, );
756	timers [timercnt - 1] = w;	1091	timers [timercnt - 1] = w;
757	upheap ((WT *)timers, timercnt - 1);	1092	upheap ((WT *)timers, timercnt - 1);
758	}	1093	}
759		1094
760	void	1095	void
761	evtimer_stop (struct ev_timer *w)	1096	ev_timer_stop (EV_P_ struct ev_timer *w)
762	{	1097	{
763	ev_clear ((W)w);	1098	ev_clear_pending (EV_A_ (W)w);
764	if (!ev_is_active (w))	1099	if (!ev_is_active (w))
765	return;	1100	return;
766		1101
767	if (w->active < timercnt--)	1102	if (w->active < timercnt--)
768	{	1103	{
…		…
770	downheap ((WT *)timers, timercnt, w->active - 1);	1105	downheap ((WT *)timers, timercnt, w->active - 1);
771	}	1106	}
772		1107
773	w->at = w->repeat;	1108	w->at = w->repeat;
774		1109
775	ev_stop ((W)w);	1110	ev_stop (EV_A_ (W)w);
776	}	1111	}
777		1112
778	void	1113	void
779	evtimer_again (struct ev_timer *w)	1114	ev_timer_again (EV_P_ struct ev_timer *w)
780	{	1115	{
781	if (ev_is_active (w))	1116	if (ev_is_active (w))
782	{	1117	{
783	if (w->repeat)	1118	if (w->repeat)
784	{	1119	{
785	w->at = now + w->repeat;	1120	w->at = mn_now + w->repeat;
786	downheap ((WT *)timers, timercnt, w->active - 1);	1121	downheap ((WT *)timers, timercnt, w->active - 1);
787	}	1122	}
788	else	1123	else
789	evtimer_stop (w);	1124	ev_timer_stop (EV_A_ w);
790	}	1125	}
791	else if (w->repeat)	1126	else if (w->repeat)
792	evtimer_start (w);	1127	ev_timer_start (EV_A_ w);
793	}	1128	}
794		1129
795	void	1130	void
796	evperiodic_start (struct ev_periodic *w)	1131	ev_periodic_start (EV_P_ struct ev_periodic *w)
797	{	1132	{
798	if (ev_is_active (w))	1133	if (ev_is_active (w))
799	return;	1134	return;
800		1135
801	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1136	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
802		1137
803	/* this formula differs from the one in periodic_reify because we do not always round up */	1138	/* this formula differs from the one in periodic_reify because we do not always round up */
804	if (w->interval)	1139	if (w->interval)
805	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1140	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
806		1141
807	ev_start ((W)w, ++periodiccnt);	1142	ev_start (EV_A_ (W)w, ++periodiccnt);
808	array_needsize (periodics, periodicmax, periodiccnt, );	1143	array_needsize (periodics, periodicmax, periodiccnt, );
809	periodics [periodiccnt - 1] = w;	1144	periodics [periodiccnt - 1] = w;
810	upheap ((WT *)periodics, periodiccnt - 1);	1145	upheap ((WT *)periodics, periodiccnt - 1);
811	}	1146	}
812		1147
813	void	1148	void
814	evperiodic_stop (struct ev_periodic *w)	1149	ev_periodic_stop (EV_P_ struct ev_periodic *w)
815	{	1150	{
816	ev_clear ((W)w);	1151	ev_clear_pending (EV_A_ (W)w);
817	if (!ev_is_active (w))	1152	if (!ev_is_active (w))
818	return;	1153	return;
819		1154
820	if (w->active < periodiccnt--)	1155	if (w->active < periodiccnt--)
821	{	1156	{
822	periodics [w->active - 1] = periodics [periodiccnt];	1157	periodics [w->active - 1] = periodics [periodiccnt];
823	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1158	downheap ((WT *)periodics, periodiccnt, w->active - 1);
824	}	1159	}
825		1160
826	ev_stop ((W)w);	1161	ev_stop (EV_A_ (W)w);
827	}	1162	}
828		1163
829	void	1164	void
830	evsignal_start (struct ev_signal *w)	1165	ev_idle_start (EV_P_ struct ev_idle *w)
831	{	1166	{
832	if (ev_is_active (w))	1167	if (ev_is_active (w))
833	return;	1168	return;
834		1169
		1170	ev_start (EV_A_ (W)w, ++idlecnt);
		1171	array_needsize (idles, idlemax, idlecnt, );
		1172	idles [idlecnt - 1] = w;
		1173	}
		1174
		1175	void
		1176	ev_idle_stop (EV_P_ struct ev_idle *w)
		1177	{
		1178	ev_clear_pending (EV_A_ (W)w);
		1179	if (ev_is_active (w))
		1180	return;
		1181
		1182	idles [w->active - 1] = idles [--idlecnt];
		1183	ev_stop (EV_A_ (W)w);
		1184	}
		1185
		1186	void
		1187	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1188	{
		1189	if (ev_is_active (w))
		1190	return;
		1191
		1192	ev_start (EV_A_ (W)w, ++preparecnt);
		1193	array_needsize (prepares, preparemax, preparecnt, );
		1194	prepares [preparecnt - 1] = w;
		1195	}
		1196
		1197	void
		1198	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1199	{
		1200	ev_clear_pending (EV_A_ (W)w);
		1201	if (ev_is_active (w))
		1202	return;
		1203
		1204	prepares [w->active - 1] = prepares [--preparecnt];
		1205	ev_stop (EV_A_ (W)w);
		1206	}
		1207
		1208	void
		1209	ev_check_start (EV_P_ struct ev_check *w)
		1210	{
		1211	if (ev_is_active (w))
		1212	return;
		1213
		1214	ev_start (EV_A_ (W)w, ++checkcnt);
		1215	array_needsize (checks, checkmax, checkcnt, );
		1216	checks [checkcnt - 1] = w;
		1217	}
		1218
		1219	void
		1220	ev_check_stop (EV_P_ struct ev_check *w)
		1221	{
		1222	ev_clear_pending (EV_A_ (W)w);
		1223	if (ev_is_active (w))
		1224	return;
		1225
		1226	checks [w->active - 1] = checks [--checkcnt];
		1227	ev_stop (EV_A_ (W)w);
		1228	}
		1229
		1230	#ifndef SA_RESTART
		1231	# define SA_RESTART 0
		1232	#endif
		1233
		1234	void
		1235	ev_signal_start (EV_P_ struct ev_signal *w)
		1236	{
		1237	#if EV_MULTIPLICITY
		1238	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1239	#endif
		1240	if (ev_is_active (w))
		1241	return;
		1242
		1243	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1244
835	ev_start ((W)w, 1);	1245	ev_start (EV_A_ (W)w, 1);
836	array_needsize (signals, signalmax, w->signum, signals_init);	1246	array_needsize (signals, signalmax, w->signum, signals_init);
837	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1247	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
838		1248
839	if (!w->next)	1249	if (!w->next)
840	{	1250	{
841	struct sigaction sa;	1251	struct sigaction sa;
842	sa.sa_handler = sighandler;	1252	sa.sa_handler = sighandler;
843	sigfillset (&sa.sa_mask);	1253	sigfillset (&sa.sa_mask);
844	sa.sa_flags = 0;	1254	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
845	sigaction (w->signum, &sa, 0);	1255	sigaction (w->signum, &sa, 0);
846	}	1256	}
847	}	1257	}
848		1258
849	void	1259	void
850	evsignal_stop (struct ev_signal *w)	1260	ev_signal_stop (EV_P_ struct ev_signal *w)
851	{	1261	{
852	ev_clear ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
853	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
854	return;	1264	return;
855		1265
856	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1266	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
857	ev_stop ((W)w);	1267	ev_stop (EV_A_ (W)w);
858		1268
859	if (!signals [w->signum - 1].head)	1269	if (!signals [w->signum - 1].head)
860	signal (w->signum, SIG_DFL);	1270	signal (w->signum, SIG_DFL);
861	}	1271	}
862		1272
863	void evidle_start (struct ev_idle *w)	1273	void
		1274	ev_child_start (EV_P_ struct ev_child *w)
864	{	1275	{
		1276	#if EV_MULTIPLICITY
		1277	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1278	#endif
865	if (ev_is_active (w))	1279	if (ev_is_active (w))
866	return;	1280	return;
867		1281
868	ev_start ((W)w, ++idlecnt);	1282	ev_start (EV_A_ (W)w, 1);
869	array_needsize (idles, idlemax, idlecnt, );	1283	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
870	idles [idlecnt - 1] = w;
871	}	1284	}
872		1285
873	void evidle_stop (struct ev_idle *w)	1286	void
		1287	ev_child_stop (EV_P_ struct ev_child *w)
874	{	1288	{
875	ev_clear ((W)w);	1289	ev_clear_pending (EV_A_ (W)w);
876	if (ev_is_active (w))	1290	if (ev_is_active (w))
877	return;	1291	return;
878		1292
879	idles [w->active - 1] = idles [--idlecnt];
880	ev_stop ((W)w);
881	}
882
883	void evprepare_start (struct ev_prepare *w)
884	{
885	if (ev_is_active (w))
886	return;
887
888	ev_start ((W)w, ++preparecnt);
889	array_needsize (prepares, preparemax, preparecnt, );
890	prepares [preparecnt - 1] = w;
891	}
892
893	void evprepare_stop (struct ev_prepare *w)
894	{
895	ev_clear ((W)w);
896	if (ev_is_active (w))
897	return;
898
899	prepares [w->active - 1] = prepares [--preparecnt];
900	ev_stop ((W)w);
901	}
902
903	void evcheck_start (struct ev_check *w)
904	{
905	if (ev_is_active (w))
906	return;
907
908	ev_start ((W)w, ++checkcnt);
909	array_needsize (checks, checkmax, checkcnt, );
910	checks [checkcnt - 1] = w;
911	}
912
913	void evcheck_stop (struct ev_check *w)
914	{
915	ev_clear ((W)w);
916	if (ev_is_active (w))
917	return;
918
919	checks [w->active - 1] = checks [--checkcnt];
920	ev_stop ((W)w);
921	}
922
923	void evchild_start (struct ev_child *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, 1);
929	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	}
931
932	void evchild_stop (struct ev_child *w)
933	{
934	ev_clear ((W)w);
935	if (ev_is_active (w))
936	return;
937
938	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1293	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
939	ev_stop ((W)w);	1294	ev_stop (EV_A_ (W)w);
940	}	1295	}
941		1296
942	/*****************************************************************************/	1297	/*****************************************************************************/
943		1298
944	struct ev_once	1299	struct ev_once
…		…
948	void (cb)(int revents, void arg);	1303	void (cb)(int revents, void arg);
949	void *arg;	1304	void *arg;
950	};	1305	};
951		1306
952	static void	1307	static void
953	once_cb (struct ev_once *once, int revents)	1308	once_cb (EV_P_ struct ev_once *once, int revents)
954	{	1309	{
955	void (cb)(int revents, void arg) = once->cb;	1310	void (cb)(int revents, void arg) = once->cb;
956	void *arg = once->arg;	1311	void *arg = once->arg;
957		1312
958	evio_stop (&once->io);	1313	ev_io_stop (EV_A_ &once->io);
959	evtimer_stop (&once->to);	1314	ev_timer_stop (EV_A_ &once->to);
960	free (once);	1315	free (once);
961		1316
962	cb (revents, arg);	1317	cb (revents, arg);
963	}	1318	}
964		1319
965	static void	1320	static void
966	once_cb_io (struct ev_io *w, int revents)	1321	once_cb_io (EV_P_ struct ev_io *w, int revents)
967	{	1322	{
968	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1323	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
969	}	1324	}
970		1325
971	static void	1326	static void
972	once_cb_to (struct ev_timer *w, int revents)	1327	once_cb_to (EV_P_ struct ev_timer *w, int revents)
973	{	1328	{
974	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1329	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
975	}	1330	}
976		1331
977	void	1332	void
978	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1333	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
979	{	1334	{
980	struct ev_once *once = malloc (sizeof (struct ev_once));	1335	struct ev_once *once = malloc (sizeof (struct ev_once));
981		1336
982	if (!once)	1337	if (!once)
983	cb (EV_ERROR, arg);	1338	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
984	else	1339	else
985	{	1340	{
986	once->cb = cb;	1341	once->cb = cb;
987	once->arg = arg;	1342	once->arg = arg;
988		1343
989	evw_init (&once->io, once_cb_io);	1344	ev_watcher_init (&once->io, once_cb_io);
990
991	if (fd >= 0)	1345	if (fd >= 0)
992	{	1346	{
993	evio_set (&once->io, fd, events);	1347	ev_io_set (&once->io, fd, events);
994	evio_start (&once->io);	1348	ev_io_start (EV_A_ &once->io);
995	}	1349	}
996		1350
997	evw_init (&once->to, once_cb_to);	1351	ev_watcher_init (&once->to, once_cb_to);
998
999	if (timeout >= 0.)	1352	if (timeout >= 0.)
1000	{	1353	{
1001	evtimer_set (&once->to, timeout, 0.);	1354	ev_timer_set (&once->to, timeout, 0.);
1002	evtimer_start (&once->to);	1355	ev_timer_start (EV_A_ &once->to);
1003	}	1356	}
1004	}	1357	}
1005	}	1358	}
1006		1359
1007	/*****************************************************************************/
1008
1009	#if 0
1010
1011	struct ev_io wio;
1012
1013	static void
1014	sin_cb (struct ev_io *w, int revents)
1015	{
1016	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1017	}
1018
1019	static void
1020	ocb (struct ev_timer *w, int revents)
1021	{
1022	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1023	evtimer_stop (w);
1024	evtimer_start (w);
1025	}
1026
1027	static void
1028	scb (struct ev_signal *w, int revents)
1029	{
1030	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1031	evio_stop (&wio);
1032	evio_start (&wio);
1033	}
1034
1035	static void
1036	gcb (struct ev_signal *w, int revents)
1037	{
1038	fprintf (stderr, "generic %x\n", revents);
1039
1040	}
1041
1042	int main (void)
1043	{
1044	ev_init (0);
1045
1046	evio_init (&wio, sin_cb, 0, EV_READ);
1047	evio_start (&wio);
1048
1049	struct ev_timer t[10000];
1050
1051	#if 0
1052	int i;
1053	for (i = 0; i < 10000; ++i)
1054	{
1055	struct ev_timer *w = t + i;
1056	evw_init (w, ocb, i);
1057	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1058	evtimer_start (w);
1059	if (drand48 () < 0.5)
1060	evtimer_stop (w);
1061	}
1062	#endif
1063
1064	struct ev_timer t1;
1065	evtimer_init (&t1, ocb, 5, 10);
1066	evtimer_start (&t1);
1067
1068	struct ev_signal sig;
1069	evsignal_init (&sig, scb, SIGQUIT);
1070	evsignal_start (&sig);
1071
1072	struct ev_check cw;
1073	evcheck_init (&cw, gcb);
1074	evcheck_start (&cw);
1075
1076	struct ev_idle iw;
1077	evidle_init (&iw, gcb);
1078	evidle_start (&iw);
1079
1080	ev_loop (0);
1081
1082	return 0;
1083	}
1084
1085	#endif
1086
1087
1088
1089

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Comparing libev/ev.c (file contents): Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs. Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.23 by root, Wed Oct 31 20:10:17 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC