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

Comparing libev/ev.c (file contents):
Revision 1.22 by root, Wed Oct 31 19:07:43 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 ? cur << 1 : 16; \	195	int newcnt = cur; \
		196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
119	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
120	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
121	cur = newcnt; \	204	cur = newcnt; \
122	}	205	}
123		206
124	/*****************************************************************************/	207	/*****************************************************************************/
125		208
126	typedef struct
127	{
128	struct ev_io *head;
129	unsigned char wev, rev; /* want, received event set */
130	} ANFD;
131
132	static ANFD *anfds;
133	static int anfdmax;
134
135	static int *fdchanges;
136	static int fdchangemax, fdchangecnt;
137
138	static void	209	static void
139	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
140	{	211	{
141	while (count--)	212	while (count--)
142	{	213	{
143	base->head = 0;	214	base->head = 0;
144	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
145	++base;	218	++base;
146	}	219	}
147	}	220	}
148		221
149	typedef struct
150	{
151	W w;
152	int events;
153	} ANPENDING;
154
155	static ANPENDING *pendings;
156	static int pendingmax, pendingcnt;
157
158	static void	222	static void
159	event (W w, int events)	223	event (EV_P_ W w, int events)
160	{	224	{
161	if (w->active)	225	if (w->pending)
162	{	226	{
163	w->pending = ++pendingcnt;
164	array_needsize (pendings, pendingmax, pendingcnt, );
165	pendings [pendingcnt - 1].w = w;
166	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
167	}	229	}
168	}
169		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
170	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
171	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
172	{	248	{
173	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
174	struct ev_io *w;	250	struct ev_io *w;
175		251
176	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
177	{	253	{
178	int ev = w->events & events;	254	int ev = w->events & events;
179		255
180	if (ev)	256	if (ev)
181	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
182	}	258	}
183	}	259	}
184		260
		261	/*****************************************************************************/
		262
185	static void	263	static void
186	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
187	{	265	{
188	int i;	266	int i;
189		267
190	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
191	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	}
192	}	314	}
193		315
194	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
195	static void	317	static void
196	fd_recheck ()	318	fd_ebadf (EV_P)
197	{	319	{
198	int fd;	320	int fd;
199		321
200	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
201	if (anfds [fd].wev)	323	if (anfds [fd].events)
202	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
203	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
204	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	}
205	}	356	}
206		357
207	/*****************************************************************************/	358	/*****************************************************************************/
208		359
209	static struct ev_timer **timers;
210	static int timermax, timercnt;
211
212	static struct ev_periodic **periodics;
213	static int periodicmax, periodiccnt;
214
215	static void	360	static void
216	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
217	{	362	{
218	WT w = timers [k];	363	WT w = heap [k];
219		364
220	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
221	{	366	{
222	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
223	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
224	k >>= 1;	369	k >>= 1;
225	}	370	}
226		371
227	timers [k] = w;	372	heap [k] = w;
228	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
229		374
230	}	375	}
231		376
232	static void	377	static void
233	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
234	{	379	{
235	WT w = timers [k];	380	WT w = heap [k];
236		381
237	while (k < (N >> 1))	382	while (k < (N >> 1))
238	{	383	{
239	int j = k << 1;	384	int j = k << 1;
240		385
241	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
242	++j;	387	++j;
243		388
244	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
245	break;	390	break;
246		391
247	timers [k] = timers [j];	392	heap [k] = heap [j];
248	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
249	k = j;	394	k = j;
250	}	395	}
251		396
252	timers [k] = w;	397	heap [k] = w;
253	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
254	}	399	}
255		400
256	/*****************************************************************************/	401	/*****************************************************************************/
257		402
258	typedef struct	403	typedef struct
259	{	404	{
260	struct ev_signal *head;	405	struct ev_watcher_list *head;
261	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
262	} ANSIG;	407	} ANSIG;
263		408
264	static ANSIG *signals;	409	static ANSIG *signals;
265	static int signalmax;	410	static int signalmax;
266		411
267	static int sigpipe [2];	412	static int sigpipe [2];
268	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
269	static struct ev_io sigev;	414	static struct ev_io sigev;
270		415
271	static void	416	static void
272	signals_init (ANSIG *base, int count)	417	signals_init (ANSIG *base, int count)
273	{	418	{
274	while (count--)	419	while (count--)
275	{	420	{
276	base->head = 0;	421	base->head = 0;
277	base->gotsig = 0;	422	base->gotsig = 0;
		423
278	++base;	424	++base;
279	}	425	}
280	}	426	}
281		427
282	static void	428	static void
…		…
284	{	430	{
285	signals [signum - 1].gotsig = 1;	431	signals [signum - 1].gotsig = 1;
286		432
287	if (!gotsig)	433	if (!gotsig)
288	{	434	{
		435	int old_errno = errno;
289	gotsig = 1;	436	gotsig = 1;
290	write (sigpipe [1], &gotsig, 1);	437	write (sigpipe [1], &signum, 1);
		438	errno = old_errno;
291	}	439	}
292	}	440	}
293		441
294	static void	442	static void
295	sigcb (struct ev_io *iow, int revents)	443	sigcb (EV_P_ struct ev_io *iow, int revents)
296	{	444	{
297	struct ev_signal *w;	445	struct ev_watcher_list *w;
298	int sig;	446	int signum;
299		447
		448	read (sigpipe [0], &revents, 1);
300	gotsig = 0;	449	gotsig = 0;
301	read (sigpipe [0], &revents, 1);
302		450
303	for (sig = signalmax; sig--; )	451	for (signum = signalmax; signum--; )
304	if (signals [sig].gotsig)	452	if (signals [signum].gotsig)
305	{	453	{
306	signals [sig].gotsig = 0;	454	signals [signum].gotsig = 0;
307		455
308	for (w = signals [sig].head; w; w = w->next)	456	for (w = signals [signum].head; w; w = w->next)
309	event ((W)w, EV_SIGNAL);	457	event (EV_A_ (W)w, EV_SIGNAL);
310	}	458	}
311	}	459	}
312		460
313	static void	461	static void
314	siginit (void)	462	siginit (EV_P)
315	{	463	{
		464	#ifndef WIN32
316	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
317	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
318		467
319	/* rather than sort out wether we really need nb, set it */	468	/* rather than sort out wether we really need nb, set it */
320	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
321	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		471	#endif
322		472
323	evio_set (&sigev, sigpipe [0], EV_READ);	473	ev_io_set (&sigev, sigpipe [0], EV_READ);
324	evio_start (&sigev);	474	ev_io_start (EV_A_ &sigev);
		475	ev_unref (EV_A); /* child watcher should not keep loop alive */
325	}	476	}
326		477
327	/*****************************************************************************/	478	/*****************************************************************************/
328		479
329	static struct ev_idle **idles;	480	#ifndef WIN32
330	static int idlemax, idlecnt;
331
332	static struct ev_prepare **prepares;
333	static int preparemax, preparecnt;
334
335	static struct ev_check **checks;
336	static int checkmax, checkcnt;
337
338	/*****************************************************************************/
339		481
340	static struct ev_child *childs [PID_HASHSIZE];	482	static struct ev_child *childs [PID_HASHSIZE];
341	static struct ev_signal childev;	483	static struct ev_signal childev;
342		484
343	#ifndef WCONTINUED	485	#ifndef WCONTINUED
344	# define WCONTINUED 0	486	# define WCONTINUED 0
345	#endif	487	#endif
346		488
347	static void	489	static void
348	childcb (struct ev_signal *sw, int revents)	490	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
349	{	491	{
350	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	{
351	int pid, status;	507	int pid, status;
352		508
353	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	509	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
354	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	510	{
355	if (w->pid == pid \|\| w->pid == -1)	511	/* make sure we are called again until all childs have been reaped */
		512	event (EV_A_ (W)sw, EV_SIGNAL);
		513
		514	child_reap (EV_A_ sw, pid, pid, status);
		515	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		516	}
		517	}
		518
		519	#endif
		520
		521	/*****************************************************************************/
		522
		523	#if EV_USE_KQUEUE
		524	# include "ev_kqueue.c"
		525	#endif
		526	#if EV_USE_EPOLL
		527	# include "ev_epoll.c"
		528	#endif
		529	#if EV_USE_POLL
		530	# include "ev_poll.c"
		531	#endif
		532	#if EV_USE_SELECT
		533	# include "ev_select.c"
		534	#endif
		535
		536	int
		537	ev_version_major (void)
		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	{
		569	if (!method)
		570	{
		571	#if EV_USE_MONOTONIC
		572	{
		573	struct timespec ts;
		574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
		575	have_monotonic = 1;
		576	}
		577	#endif
		578
		579	rt_now = ev_time ();
		580	mn_now = get_clock ();
		581	now_floor = mn_now;
		582	rtmn_diff = rt_now - mn_now;
		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])
		680	if (pipe (sigpipe))
		681	return 0;
		682
		683	if (!default_loop)
		684	{
		685	#if EV_MULTIPLICITY
		686	struct ev_loop *loop = default_loop = &default_loop_struct;
		687	#else
		688	default_loop = 1;
		689	#endif
		690
		691	loop_init (EV_A_ methods);
		692
		693	if (ev_method (EV_A))
356	{	694	{
357	w->status = status;	695	ev_watcher_init (&sigev, sigcb);
358	event ((W)w, EV_CHILD);	696	ev_set_priority (&sigev, EV_MAXPRI);
		697	siginit (EV_A);
		698
		699	#ifndef WIN32
		700	ev_signal_init (&childev, childcb, SIGCHLD);
		701	ev_set_priority (&childev, EV_MAXPRI);
		702	ev_signal_start (EV_A_ &childev);
		703	ev_unref (EV_A); /* child watcher should not keep loop alive */
		704	#endif
359	}	705	}
360	}	706	else
361		707	default_loop = 0;
362	/*****************************************************************************/
363
364	#if HAVE_EPOLL
365	# include "ev_epoll.c"
366	#endif
367	#if HAVE_SELECT
368	# include "ev_select.c"
369	#endif
370
371	int ev_init (int flags)
372	{
373	#if HAVE_MONOTONIC
374	{
375	struct timespec ts;
376	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
377	have_monotonic = 1;
378	}
379	#endif
380
381	ev_now = ev_time ();
382	now = get_clock ();
383	diff = ev_now - now;
384
385	if (pipe (sigpipe))
386	return 0;
387
388	ev_method = EVMETHOD_NONE;
389	#if HAVE_EPOLL
390	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
391	#endif
392	#if HAVE_SELECT
393	if (ev_method == EVMETHOD_NONE) select_init (flags);
394	#endif
395
396	if (ev_method)
397	{	708	}
398	evw_init (&sigev, sigcb);
399	siginit ();
400		709
401	evsignal_init (&childev, childcb, SIGCHLD);	710	return default_loop;
		711	}
		712
		713	void
		714	ev_default_destroy (void)
		715	{
		716	#if EV_MULTIPLICITY
		717	struct ev_loop *loop = default_loop;
		718	#endif
		719
		720	ev_ref (EV_A); /* child watcher */
402	evsignal_start (&childev);	721	ev_signal_stop (EV_A_ &childev);
403	}
404		722
405	return ev_method;	723	ev_ref (EV_A); /* signal watcher */
406	}
407
408	/*****************************************************************************/
409
410	void ev_prefork (void)
411	{
412	/* nop */
413	}
414
415	void ev_postfork_parent (void)
416	{
417	/* nop */
418	}
419
420	void ev_postfork_child (void)
421	{
422	#if HAVE_EPOLL
423	if (ev_method == EVMETHOD_EPOLL)
424	epoll_postfork_child ();
425	#endif
426
427	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);
428	close (sigpipe [0]);	738	close (sigpipe [0]);
429	close (sigpipe [1]);	739	close (sigpipe [1]);
430	pipe (sigpipe);	740	pipe (sigpipe);
		741
		742	ev_ref (EV_A); /* signal watcher */
431	siginit ();	743	siginit (EV_A);
432	}	744	}
433		745
434	/*****************************************************************************/	746	/*****************************************************************************/
435		747
436	static void	748	static void
437	fd_reify (void)	749	call_pending (EV_P)
438	{	750	{
439	int i;	751	int pri;
440		752
441	for (i = 0; i < fdchangecnt; ++i)	753	for (pri = NUMPRI; pri--; )
442	{	754	while (pendingcnt [pri])
443	int fd = fdchanges [i];
444	ANFD *anfd = anfds + fd;
445	struct ev_io *w;
446
447	int wev = 0;
448
449	for (w = anfd->head; w; w = w->next)
450	wev \|= w->events;
451
452	if (anfd->wev != wev)
453	{	755	{
454	method_modify (fd, anfd->wev, wev);
455	anfd->wev = wev;
456	}
457	}
458
459	fdchangecnt = 0;
460	}
461
462	static void
463	call_pending ()
464	{
465	while (pendingcnt)
466	{
467	ANPENDING *p = pendings + --pendingcnt;	756	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
468		757
469	if (p->w)	758	if (p->w)
470	{	759	{
471	p->w->pending = 0;	760	p->w->pending = 0;
472	p->w->cb (p->w, p->events);	761	p->w->cb (EV_A_ p->w, p->events);
473	}	762	}
474	}	763	}
475	}	764	}
476		765
477	static void	766	static void
478	timers_reify ()	767	timers_reify (EV_P)
479	{	768	{
480	while (timercnt && timers [0]->at <= now)	769	while (timercnt && timers [0]->at <= mn_now)
481	{	770	{
482	struct ev_timer *w = timers [0];	771	struct ev_timer *w = timers [0];
483
484	event ((W)w, EV_TIMEOUT);
485		772
486	/* first reschedule or stop timer */	773	/* first reschedule or stop timer */
487	if (w->repeat)	774	if (w->repeat)
488	{	775	{
		776	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
489	w->at = now + w->repeat;	777	w->at = mn_now + w->repeat;
490	assert (("timer timeout in the past, negative repeat?", w->at > now));
491	downheap ((WT *)timers, timercnt, 0);	778	downheap ((WT *)timers, timercnt, 0);
492	}	779	}
493	else	780	else
494	evtimer_stop (w); /* nonrepeating: stop timer */	781	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
495	}
496	}
497		782
		783	event (EV_A_ (W)w, EV_TIMEOUT);
		784	}
		785	}
		786
498	static void	787	static void
499	periodics_reify ()	788	periodics_reify (EV_P)
500	{	789	{
501	while (periodiccnt && periodics [0]->at <= ev_now)	790	while (periodiccnt && periodics [0]->at <= rt_now)
502	{	791	{
503	struct ev_periodic *w = periodics [0];	792	struct ev_periodic *w = periodics [0];
504		793
505	/* first reschedule or stop timer */	794	/* first reschedule or stop timer */
506	if (w->interval)	795	if (w->interval)
507	{	796	{
508	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;
509	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));
510	downheap ((WT *)periodics, periodiccnt, 0);	799	downheap ((WT *)periodics, periodiccnt, 0);
511	}	800	}
512	else	801	else
513	evperiodic_stop (w); /* nonrepeating: stop timer */	802	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
514		803
515	event ((W)w, EV_TIMEOUT);	804	event (EV_A_ (W)w, EV_PERIODIC);
516	}	805	}
517	}	806	}
518		807
519	static void	808	static void
520	periodics_reschedule (ev_tstamp diff)	809	periodics_reschedule (EV_P)
521	{	810	{
522	int i;	811	int i;
523		812
524	/* adjust periodics after time jump */	813	/* adjust periodics after time jump */
525	for (i = 0; i < periodiccnt; ++i)	814	for (i = 0; i < periodiccnt; ++i)
526	{	815	{
527	struct ev_periodic *w = periodics [i];	816	struct ev_periodic *w = periodics [i];
528		817
529	if (w->interval)	818	if (w->interval)
530	{	819	{
531	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;
532		821
533	if (fabs (diff) >= 1e-4)	822	if (fabs (diff) >= 1e-4)
534	{	823	{
535	evperiodic_stop (w);	824	ev_periodic_stop (EV_A_ w);
536	evperiodic_start (w);	825	ev_periodic_start (EV_A_ w);
537		826
538	i = 0; /* restart loop, inefficient, but time jumps should be rare */	827	i = 0; /* restart loop, inefficient, but time jumps should be rare */
539	}	828	}
540	}	829	}
541	}	830	}
542	}	831	}
543		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
544	static void	851	static void
545	time_update ()	852	time_update (EV_P)
546	{	853	{
547	int i;	854	int i;
548		855
549	ev_now = ev_time ();	856	#if EV_USE_MONOTONIC
550
551	if (have_monotonic)	857	if (expect_true (have_monotonic))
552	{	858	{
553	ev_tstamp odiff = diff;	859	if (time_update_monotonic (EV_A))
554
555	for (i = 4; --i; ) /* loop a few times, before making important decisions */
556	{	860	{
557	now = get_clock ();	861	ev_tstamp odiff = rtmn_diff;
		862
		863	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		864	{
558	diff = ev_now - now;	865	rtmn_diff = rt_now - mn_now;
559		866
560	if (fabs (odiff - diff) < MIN_TIMEJUMP)	867	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
561	return; /* all is well */	868	return; /* all is well */
562		869
563	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) */
564	}	878	}
565
566	periodics_reschedule (diff - odiff);
567	/* no timer adjustment, as the monotonic clock doesn't jump */
568	}	879	}
569	else	880	else
		881	#endif
570	{	882	{
571	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))
572	{	886	{
573	periodics_reschedule (ev_now - now);	887	periodics_reschedule (EV_A);
574		888
575	/* 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 */
576	for (i = 0; i < timercnt; ++i)	890	for (i = 0; i < timercnt; ++i)
577	timers [i]->at += diff;	891	timers [i]->at += rt_now - mn_now;
578	}	892	}
579		893
580	now = ev_now;	894	mn_now = rt_now;
581	}	895	}
582	}	896	}
583		897
584	int ev_loop_done;	898	void
		899	ev_ref (EV_P)
		900	{
		901	++activecnt;
		902	}
585		903
		904	void
		905	ev_unref (EV_P)
		906	{
		907	--activecnt;
		908	}
		909
		910	static int loop_done;
		911
		912	void
586	void ev_loop (int flags)	913	ev_loop (EV_P_ int flags)
587	{	914	{
588	double block;	915	double block;
589	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	916	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
590		917
591	do	918	do
592	{	919	{
593	/* queue check watchers (and execute them) */	920	/* queue check watchers (and execute them) */
594	if (preparecnt)	921	if (expect_false (preparecnt))
595	{	922	{
596	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	923	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
597	call_pending ();	924	call_pending (EV_A);
598	}	925	}
599		926
600	/* update fd-related kernel structures */	927	/* update fd-related kernel structures */
601	fd_reify ();	928	fd_reify (EV_A);
602		929
603	/* calculate blocking time */	930	/* calculate blocking time */
604		931
605	/* 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
606	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	{
607	ev_now = ev_time ();	940	rt_now = ev_time ();
		941	mn_now = rt_now;
		942	}
608		943
609	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	944	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
610	block = 0.;	945	block = 0.;
611	else	946	else
612	{	947	{
613	block = MAX_BLOCKTIME;	948	block = MAX_BLOCKTIME;
614		949
615	if (timercnt)	950	if (timercnt)
616	{	951	{
617	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;
618	if (block > to) block = to;	953	if (block > to) block = to;
619	}	954	}
620		955
621	if (periodiccnt)	956	if (periodiccnt)
622	{	957	{
623	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	958	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
624	if (block > to) block = to;	959	if (block > to) block = to;
625	}	960	}
626		961
627	if (block < 0.) block = 0.;	962	if (block < 0.) block = 0.;
628	}	963	}
629		964
630	method_poll (block);	965	method_poll (EV_A_ block);
631		966
632	/* update ev_now, do magic */	967	/* update rt_now, do magic */
633	time_update ();	968	time_update (EV_A);
634		969
635	/* queue pending timers and reschedule them */	970	/* queue pending timers and reschedule them */
636	timers_reify (); /* relative timers called last */	971	timers_reify (EV_A); /* relative timers called last */
637	periodics_reify (); /* absolute timers called first */	972	periodics_reify (EV_A); /* absolute timers called first */
638		973
639	/* queue idle watchers unless io or timers are pending */	974	/* queue idle watchers unless io or timers are pending */
640	if (!pendingcnt)	975	if (!pendingcnt)
641	queue_events ((W *)idles, idlecnt, EV_IDLE);	976	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
642		977
643	/* queue check watchers, to be executed first */	978	/* queue check watchers, to be executed first */
644	if (checkcnt)	979	if (checkcnt)
645	queue_events ((W *)checks, checkcnt, EV_CHECK);	980	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
646		981
647	call_pending ();	982	call_pending (EV_A);
648	}	983	}
649	while (!ev_loop_done);	984	while (activecnt && !loop_done);
650		985
651	if (ev_loop_done != 2)	986	if (loop_done != 2)
652	ev_loop_done = 0;	987	loop_done = 0;
		988	}
		989
		990	void
		991	ev_unloop (EV_P_ int how)
		992	{
		993	loop_done = how;
653	}	994	}
654		995
655	/*****************************************************************************/	996	/*****************************************************************************/
656		997
657	static void	998	inline void
658	wlist_add (WL *head, WL elem)	999	wlist_add (WL *head, WL elem)
659	{	1000	{
660	elem->next = *head;	1001	elem->next = *head;
661	*head = elem;	1002	*head = elem;
662	}	1003	}
663		1004
664	static void	1005	inline void
665	wlist_del (WL *head, WL elem)	1006	wlist_del (WL *head, WL elem)
666	{	1007	{
667	while (*head)	1008	while (*head)
668	{	1009	{
669	if (*head == elem)	1010	if (*head == elem)
…		…
674		1015
675	head = &(*head)->next;	1016	head = &(*head)->next;
676	}	1017	}
677	}	1018	}
678		1019
679	static void	1020	inline void
680	ev_clear (W w)	1021	ev_clear_pending (EV_P_ W w)
681	{	1022	{
682	if (w->pending)	1023	if (w->pending)
683	{	1024	{
684	pendings [w->pending - 1].w = 0;	1025	pendings [ABSPRI (w)][w->pending - 1].w = 0;
685	w->pending = 0;	1026	w->pending = 0;
686	}	1027	}
687	}	1028	}
688		1029
689	static void	1030	inline void
690	ev_start (W w, int active)	1031	ev_start (EV_P_ W w, int active)
691	{	1032	{
		1033	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1034	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1035
692	w->active = active;	1036	w->active = active;
		1037	ev_ref (EV_A);
693	}	1038	}
694		1039
695	static void	1040	inline void
696	ev_stop (W w)	1041	ev_stop (EV_P_ W w)
697	{	1042	{
		1043	ev_unref (EV_A);
698	w->active = 0;	1044	w->active = 0;
699	}	1045	}
700		1046
701	/*****************************************************************************/	1047	/*****************************************************************************/
702		1048
703	void	1049	void
704	evio_start (struct ev_io *w)	1050	ev_io_start (EV_P_ struct ev_io *w)
705	{	1051	{
		1052	int fd = w->fd;
		1053
706	if (ev_is_active (w))	1054	if (ev_is_active (w))
707	return;	1055	return;
708		1056
709	int fd = w->fd;	1057	assert (("ev_io_start called with negative fd", fd >= 0));
710		1058
711	ev_start ((W)w, 1);	1059	ev_start (EV_A_ (W)w, 1);
712	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1060	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
713	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1061	wlist_add ((WL *)&anfds[fd].head, (WL)w);
714		1062
715	++fdchangecnt;	1063	fd_change (EV_A_ fd);
716	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
717	fdchanges [fdchangecnt - 1] = fd;
718	}	1064	}
719		1065
720	void	1066	void
721	evio_stop (struct ev_io *w)	1067	ev_io_stop (EV_P_ struct ev_io *w)
722	{	1068	{
723	ev_clear ((W)w);	1069	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1070	if (!ev_is_active (w))
725	return;	1071	return;
726		1072
727	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1073	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
728	ev_stop ((W)w);	1074	ev_stop (EV_A_ (W)w);
729		1075
730	++fdchangecnt;	1076	fd_change (EV_A_ w->fd);
731	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
732	fdchanges [fdchangecnt - 1] = w->fd;
733	}	1077	}
734		1078
735	void	1079	void
736	evtimer_start (struct ev_timer *w)	1080	ev_timer_start (EV_P_ struct ev_timer *w)
737	{	1081	{
738	if (ev_is_active (w))	1082	if (ev_is_active (w))
739	return;	1083	return;
740		1084
741	w->at += now;	1085	w->at += mn_now;
742		1086
743	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.));
744		1088
745	ev_start ((W)w, ++timercnt);	1089	ev_start (EV_A_ (W)w, ++timercnt);
746	array_needsize (timers, timermax, timercnt, );	1090	array_needsize (timers, timermax, timercnt, );
747	timers [timercnt - 1] = w;	1091	timers [timercnt - 1] = w;
748	upheap ((WT *)timers, timercnt - 1);	1092	upheap ((WT *)timers, timercnt - 1);
749	}	1093	}
750		1094
751	void	1095	void
752	evtimer_stop (struct ev_timer *w)	1096	ev_timer_stop (EV_P_ struct ev_timer *w)
753	{	1097	{
754	ev_clear ((W)w);	1098	ev_clear_pending (EV_A_ (W)w);
755	if (!ev_is_active (w))	1099	if (!ev_is_active (w))
756	return;	1100	return;
757		1101
758	if (w->active < timercnt--)	1102	if (w->active < timercnt--)
759	{	1103	{
…		…
761	downheap ((WT *)timers, timercnt, w->active - 1);	1105	downheap ((WT *)timers, timercnt, w->active - 1);
762	}	1106	}
763		1107
764	w->at = w->repeat;	1108	w->at = w->repeat;
765		1109
766	ev_stop ((W)w);	1110	ev_stop (EV_A_ (W)w);
767	}	1111	}
768		1112
769	void	1113	void
770	evtimer_again (struct ev_timer *w)	1114	ev_timer_again (EV_P_ struct ev_timer *w)
771	{	1115	{
772	if (ev_is_active (w))	1116	if (ev_is_active (w))
773	{	1117	{
774	if (w->repeat)	1118	if (w->repeat)
775	{	1119	{
776	w->at = now + w->repeat;	1120	w->at = mn_now + w->repeat;
777	downheap ((WT *)timers, timercnt, w->active - 1);	1121	downheap ((WT *)timers, timercnt, w->active - 1);
778	}	1122	}
779	else	1123	else
780	evtimer_stop (w);	1124	ev_timer_stop (EV_A_ w);
781	}	1125	}
782	else if (w->repeat)	1126	else if (w->repeat)
783	evtimer_start (w);	1127	ev_timer_start (EV_A_ w);
784	}	1128	}
785		1129
786	void	1130	void
787	evperiodic_start (struct ev_periodic *w)	1131	ev_periodic_start (EV_P_ struct ev_periodic *w)
788	{	1132	{
789	if (ev_is_active (w))	1133	if (ev_is_active (w))
790	return;	1134	return;
791		1135
792	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.));
793		1137
794	/* 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 */
795	if (w->interval)	1139	if (w->interval)
796	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1140	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
797		1141
798	ev_start ((W)w, ++periodiccnt);	1142	ev_start (EV_A_ (W)w, ++periodiccnt);
799	array_needsize (periodics, periodicmax, periodiccnt, );	1143	array_needsize (periodics, periodicmax, periodiccnt, );
800	periodics [periodiccnt - 1] = w;	1144	periodics [periodiccnt - 1] = w;
801	upheap ((WT *)periodics, periodiccnt - 1);	1145	upheap ((WT *)periodics, periodiccnt - 1);
802	}	1146	}
803		1147
804	void	1148	void
805	evperiodic_stop (struct ev_periodic *w)	1149	ev_periodic_stop (EV_P_ struct ev_periodic *w)
806	{	1150	{
807	ev_clear ((W)w);	1151	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1152	if (!ev_is_active (w))
809	return;	1153	return;
810		1154
811	if (w->active < periodiccnt--)	1155	if (w->active < periodiccnt--)
812	{	1156	{
813	periodics [w->active - 1] = periodics [periodiccnt];	1157	periodics [w->active - 1] = periodics [periodiccnt];
814	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1158	downheap ((WT *)periodics, periodiccnt, w->active - 1);
815	}	1159	}
816		1160
817	ev_stop ((W)w);	1161	ev_stop (EV_A_ (W)w);
818	}	1162	}
819		1163
820	void	1164	void
821	evsignal_start (struct ev_signal *w)	1165	ev_idle_start (EV_P_ struct ev_idle *w)
822	{	1166	{
823	if (ev_is_active (w))	1167	if (ev_is_active (w))
824	return;	1168	return;
825		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
826	ev_start ((W)w, 1);	1245	ev_start (EV_A_ (W)w, 1);
827	array_needsize (signals, signalmax, w->signum, signals_init);	1246	array_needsize (signals, signalmax, w->signum, signals_init);
828	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1247	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
829		1248
830	if (!w->next)	1249	if (!w->next)
831	{	1250	{
832	struct sigaction sa;	1251	struct sigaction sa;
833	sa.sa_handler = sighandler;	1252	sa.sa_handler = sighandler;
834	sigfillset (&sa.sa_mask);	1253	sigfillset (&sa.sa_mask);
835	sa.sa_flags = 0;	1254	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
836	sigaction (w->signum, &sa, 0);	1255	sigaction (w->signum, &sa, 0);
837	}	1256	}
838	}	1257	}
839		1258
840	void	1259	void
841	evsignal_stop (struct ev_signal *w)	1260	ev_signal_stop (EV_P_ struct ev_signal *w)
842	{	1261	{
843	ev_clear ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
844	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
845	return;	1264	return;
846		1265
847	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1266	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
848	ev_stop ((W)w);	1267	ev_stop (EV_A_ (W)w);
849		1268
850	if (!signals [w->signum - 1].head)	1269	if (!signals [w->signum - 1].head)
851	signal (w->signum, SIG_DFL);	1270	signal (w->signum, SIG_DFL);
852	}	1271	}
853		1272
854	void evidle_start (struct ev_idle *w)	1273	void
		1274	ev_child_start (EV_P_ struct ev_child *w)
855	{	1275	{
		1276	#if EV_MULTIPLICITY
		1277	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1278	#endif
856	if (ev_is_active (w))	1279	if (ev_is_active (w))
857	return;	1280	return;
858		1281
859	ev_start ((W)w, ++idlecnt);	1282	ev_start (EV_A_ (W)w, 1);
860	array_needsize (idles, idlemax, idlecnt, );	1283	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
861	idles [idlecnt - 1] = w;
862	}	1284	}
863		1285
864	void evidle_stop (struct ev_idle *w)	1286	void
		1287	ev_child_stop (EV_P_ struct ev_child *w)
865	{	1288	{
866	ev_clear ((W)w);	1289	ev_clear_pending (EV_A_ (W)w);
867	if (ev_is_active (w))	1290	if (ev_is_active (w))
868	return;	1291	return;
869		1292
870	idles [w->active - 1] = idles [--idlecnt];
871	ev_stop ((W)w);
872	}
873
874	void evprepare_start (struct ev_prepare *w)
875	{
876	if (ev_is_active (w))
877	return;
878
879	ev_start ((W)w, ++preparecnt);
880	array_needsize (prepares, preparemax, preparecnt, );
881	prepares [preparecnt - 1] = w;
882	}
883
884	void evprepare_stop (struct ev_prepare *w)
885	{
886	ev_clear ((W)w);
887	if (ev_is_active (w))
888	return;
889
890	prepares [w->active - 1] = prepares [--preparecnt];
891	ev_stop ((W)w);
892	}
893
894	void evcheck_start (struct ev_check *w)
895	{
896	if (ev_is_active (w))
897	return;
898
899	ev_start ((W)w, ++checkcnt);
900	array_needsize (checks, checkmax, checkcnt, );
901	checks [checkcnt - 1] = w;
902	}
903
904	void evcheck_stop (struct ev_check *w)
905	{
906	ev_clear ((W)w);
907	if (ev_is_active (w))
908	return;
909
910	checks [w->active - 1] = checks [--checkcnt];
911	ev_stop ((W)w);
912	}
913
914	void evchild_start (struct ev_child *w)
915	{
916	if (ev_is_active (w))
917	return;
918
919	ev_start ((W)w, 1);
920	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
921	}
922
923	void evchild_stop (struct ev_child *w)
924	{
925	ev_clear ((W)w);
926	if (ev_is_active (w))
927	return;
928
929	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1293	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
930	ev_stop ((W)w);	1294	ev_stop (EV_A_ (W)w);
931	}	1295	}
932		1296
933	/*****************************************************************************/	1297	/*****************************************************************************/
934		1298
935	struct ev_once	1299	struct ev_once
…		…
939	void (cb)(int revents, void arg);	1303	void (cb)(int revents, void arg);
940	void *arg;	1304	void *arg;
941	};	1305	};
942		1306
943	static void	1307	static void
944	once_cb (struct ev_once *once, int revents)	1308	once_cb (EV_P_ struct ev_once *once, int revents)
945	{	1309	{
946	void (cb)(int revents, void arg) = once->cb;	1310	void (cb)(int revents, void arg) = once->cb;
947	void *arg = once->arg;	1311	void *arg = once->arg;
948		1312
949	evio_stop (&once->io);	1313	ev_io_stop (EV_A_ &once->io);
950	evtimer_stop (&once->to);	1314	ev_timer_stop (EV_A_ &once->to);
951	free (once);	1315	free (once);
952		1316
953	cb (revents, arg);	1317	cb (revents, arg);
954	}	1318	}
955		1319
956	static void	1320	static void
957	once_cb_io (struct ev_io *w, int revents)	1321	once_cb_io (EV_P_ struct ev_io *w, int revents)
958	{	1322	{
959	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);
960	}	1324	}
961		1325
962	static void	1326	static void
963	once_cb_to (struct ev_timer *w, int revents)	1327	once_cb_to (EV_P_ struct ev_timer *w, int revents)
964	{	1328	{
965	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);
966	}	1330	}
967		1331
968	void	1332	void
969	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)
970	{	1334	{
971	struct ev_once *once = malloc (sizeof (struct ev_once));	1335	struct ev_once *once = malloc (sizeof (struct ev_once));
972		1336
973	if (!once)	1337	if (!once)
974	cb (EV_ERROR, arg);	1338	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
975	else	1339	else
976	{	1340	{
977	once->cb = cb;	1341	once->cb = cb;
978	once->arg = arg;	1342	once->arg = arg;
979		1343
980	evw_init (&once->io, once_cb_io);	1344	ev_watcher_init (&once->io, once_cb_io);
981
982	if (fd >= 0)	1345	if (fd >= 0)
983	{	1346	{
984	evio_set (&once->io, fd, events);	1347	ev_io_set (&once->io, fd, events);
985	evio_start (&once->io);	1348	ev_io_start (EV_A_ &once->io);
986	}	1349	}
987		1350
988	evw_init (&once->to, once_cb_to);	1351	ev_watcher_init (&once->to, once_cb_to);
989
990	if (timeout >= 0.)	1352	if (timeout >= 0.)
991	{	1353	{
992	evtimer_set (&once->to, timeout, 0.);	1354	ev_timer_set (&once->to, timeout, 0.);
993	evtimer_start (&once->to);	1355	ev_timer_start (EV_A_ &once->to);
994	}	1356	}
995	}	1357	}
996	}	1358	}
997		1359
998	/*****************************************************************************/
999
1000	#if 0
1001
1002	struct ev_io wio;
1003
1004	static void
1005	sin_cb (struct ev_io *w, int revents)
1006	{
1007	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1008	}
1009
1010	static void
1011	ocb (struct ev_timer *w, int revents)
1012	{
1013	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1014	evtimer_stop (w);
1015	evtimer_start (w);
1016	}
1017
1018	static void
1019	scb (struct ev_signal *w, int revents)
1020	{
1021	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1022	evio_stop (&wio);
1023	evio_start (&wio);
1024	}
1025
1026	static void
1027	gcb (struct ev_signal *w, int revents)
1028	{
1029	fprintf (stderr, "generic %x\n", revents);
1030
1031	}
1032
1033	int main (void)
1034	{
1035	ev_init (0);
1036
1037	evio_init (&wio, sin_cb, 0, EV_READ);
1038	evio_start (&wio);
1039
1040	struct ev_timer t[10000];
1041
1042	#if 0
1043	int i;
1044	for (i = 0; i < 10000; ++i)
1045	{
1046	struct ev_timer *w = t + i;
1047	evw_init (w, ocb, i);
1048	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
1049	evtimer_start (w);
1050	if (drand48 () < 0.5)
1051	evtimer_stop (w);
1052	}
1053	#endif
1054
1055	struct ev_timer t1;
1056	evtimer_init (&t1, ocb, 5, 10);
1057	evtimer_start (&t1);
1058
1059	struct ev_signal sig;
1060	evsignal_init (&sig, scb, SIGQUIT);
1061	evsignal_start (&sig);
1062
1063	struct ev_check cw;
1064	evcheck_init (&cw, gcb);
1065	evcheck_start (&cw);
1066
1067	struct ev_idle iw;
1068	evidle_init (&iw, gcb);
1069	evidle_start (&iw);
1070
1071	ev_loop (0);
1072
1073	return 0;
1074	}
1075
1076	#endif
1077
1078
1079
1080

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Comparing libev/ev.c (file contents): Revision 1.22 by root, Wed Oct 31 19:07:43 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 1.22 by root, Wed Oct 31 19:07:43 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC