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

Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 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
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
36		63
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
41	#include <sys/time.h>	72	#include <sys/time.h>
42	#include <time.h>	73	#include <time.h>
43		74
44	#define HAVE_EPOLL 1	75	/**/
45		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
49	# endif	102	# endif
50	#endif	103	#endif
51		104
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	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
63		122
64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
65	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
66		127
67	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
68		143
69	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
70	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
71	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
72		147
73	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
74	ev_tstamp ev_now;
75	int ev_method;
76
77	static int have_monotonic; /* runtime */
78
79	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
80	static void (*method_modify)(int fd, int oev, int nev);
81	static void (*method_poll)(ev_tstamp timeout);
82		149
83	/*****************************************************************************/	150	/*****************************************************************************/
84		151
85	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
86	ev_time (void)	186	ev_time (void)
87	{	187	{
88	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
89	struct timespec ts;	189	struct timespec ts;
90	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
91	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
92	#else	192	#else
93	struct timeval tv;	193	struct timeval tv;
94	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
95	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
96	#endif	196	#endif
97	}	197	}
98		198
99	static ev_tstamp	199	inline ev_tstamp
100	get_clock (void)	200	get_clock (void)
101	{	201	{
102	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
103	if (have_monotonic)	203	if (expect_true (have_monotonic))
104	{	204	{
105	struct timespec ts;	205	struct timespec ts;
106	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
107	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
108	}	208	}
109	#endif	209	#endif
110		210
111	return ev_time ();	211	return ev_time ();
112	}	212	}
113		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
		220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		221
114	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
115	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
116	{ \	224	{ \
117	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
		226	do \
		227	{ \
		228	newcnt = array_roundsize (base, newcnt << 1); \
		229	} \
		230	while ((cnt) > newcnt); \
		231	\
118	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
119	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
120	cur = newcnt; \	234	cur = newcnt; \
121	}	235	}
122		236
123	/*****************************************************************************/	237	/*****************************************************************************/
124		238
125	typedef struct
126	{
127	struct ev_io *head;
128	unsigned char wev, rev; /* want, received event set */
129	} ANFD;
130
131	static ANFD *anfds;
132	static int anfdmax;
133
134	static int *fdchanges;
135	static int fdchangemax, fdchangecnt;
136
137	static void	239	static void
138	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
139	{	241	{
140	while (count--)	242	while (count--)
141	{	243	{
142	base->head = 0;	244	base->head = 0;
143	base->wev = base->rev = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
144	++base;	248	++base;
145	}	249	}
146	}	250	}
147		251
148	typedef struct
149	{
150	W w;
151	int events;
152	} ANPENDING;
153
154	static ANPENDING *pendings;
155	static int pendingmax, pendingcnt;
156
157	static void	252	static void
158	event (W w, int events)	253	event (EV_P_ W w, int events)
159	{	254	{
160	if (w->active)	255	if (w->pending)
161	{	256	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		258	return;
166	}	259	}
167	}
168		260
		261	w->pending = ++pendingcnt [ABSPRI (w)];
		262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		263	pendings [ABSPRI (w)][w->pending - 1].w = w;
		264	pendings [ABSPRI (w)][w->pending - 1].events = events;
		265	}
		266
169	static void	267	static void
		268	queue_events (EV_P_ W *events, int eventcnt, int type)
		269	{
		270	int i;
		271
		272	for (i = 0; i < eventcnt; ++i)
		273	event (EV_A_ events [i], type);
		274	}
		275
		276	static void
170	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
171	{	278	{
172	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	280	struct ev_io *w;
174		281
175	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
176	{	283	{
177	int ev = w->events & events;	284	int ev = w->events & events;
178		285
179	if (ev)	286	if (ev)
180	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
181	}	288	}
182	}	289	}
183		290
		291	/*****************************************************************************/
		292
184	static void	293	static void
185	queue_events (W *events, int eventcnt, int type)	294	fd_reify (EV_P)
186	{	295	{
187	int i;	296	int i;
188		297
189	for (i = 0; i < eventcnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	299	{
		300	int fd = fdchanges [i];
		301	ANFD *anfd = anfds + fd;
		302	struct ev_io *w;
		303
		304	int events = 0;
		305
		306	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		307	events \|= w->events;
		308
		309	anfd->reify = 0;
		310
		311	method_modify (EV_A_ fd, anfd->events, events);
		312	anfd->events = events;
		313	}
		314
		315	fdchangecnt = 0;
		316	}
		317
		318	static void
		319	fd_change (EV_P_ int fd)
		320	{
		321	if (anfds [fd].reify \|\| fdchangecnt < 0)
		322	return;
		323
		324	anfds [fd].reify = 1;
		325
		326	++fdchangecnt;
		327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		328	fdchanges [fdchangecnt - 1] = fd;
		329	}
		330
		331	static void
		332	fd_kill (EV_P_ int fd)
		333	{
		334	struct ev_io *w;
		335
		336	while ((w = (struct ev_io *)anfds [fd].head))
		337	{
		338	ev_io_stop (EV_A_ w);
		339	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		340	}
		341	}
		342
		343	/* called on EBADF to verify fds */
		344	static void
		345	fd_ebadf (EV_P)
		346	{
		347	int fd;
		348
		349	for (fd = 0; fd < anfdmax; ++fd)
		350	if (anfds [fd].events)
		351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		352	fd_kill (EV_A_ fd);
		353	}
		354
		355	/* called on ENOMEM in select/poll to kill some fds and retry */
		356	static void
		357	fd_enomem (EV_P)
		358	{
		359	int fd;
		360
		361	for (fd = anfdmax; fd--; )
		362	if (anfds [fd].events)
		363	{
		364	close (fd);
		365	fd_kill (EV_A_ fd);
		366	return;
		367	}
		368	}
		369
		370	/* susually called after fork if method needs to re-arm all fds from scratch */
		371	static void
		372	fd_rearm_all (EV_P)
		373	{
		374	int fd;
		375
		376	/* this should be highly optimised to not do anything but set a flag */
		377	for (fd = 0; fd < anfdmax; ++fd)
		378	if (anfds [fd].events)
		379	{
		380	anfds [fd].events = 0;
		381	fd_change (EV_A_ fd);
		382	}
191	}	383	}
192		384
193	/*****************************************************************************/	385	/*****************************************************************************/
194		386
195	static struct ev_timer **timers;
196	static int timermax, timercnt;
197
198	static struct ev_periodic **periodics;
199	static int periodicmax, periodiccnt;
200
201	static void	387	static void
202	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
203	{	389	{
204	WT w = timers [k];	390	WT w = heap [k];
205		391
206	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
207	{	393	{
208	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
210	k >>= 1;	396	k >>= 1;
211	}	397	}
212		398
213	timers [k] = w;	399	heap [k] = w;
214	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
215		401
216	}	402	}
217		403
218	static void	404	static void
219	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
220	{	406	{
221	WT w = timers [k];	407	WT w = heap [k];
222		408
223	while (k < (N >> 1))	409	while (k < (N >> 1))
224	{	410	{
225	int j = k << 1;	411	int j = k << 1;
226		412
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	414	++j;
229		415
230	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
231	break;	417	break;
232		418
233	timers [k] = timers [j];	419	heap [k] = heap [j];
234	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
235	k = j;	421	k = j;
236	}	422	}
237		423
238	timers [k] = w;	424	heap [k] = w;
239	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
240	}	426	}
241		427
242	/*****************************************************************************/	428	/*****************************************************************************/
243		429
244	typedef struct	430	typedef struct
245	{	431	{
246	struct ev_signal *head;	432	struct ev_watcher_list *head;
247	sig_atomic_t gotsig;	433	sig_atomic_t volatile gotsig;
248	} ANSIG;	434	} ANSIG;
249		435
250	static ANSIG *signals;	436	static ANSIG *signals;
251	static int signalmax;	437	static int signalmax;
252		438
253	static int sigpipe [2];	439	static int sigpipe [2];
254	static sig_atomic_t gotsig;	440	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	441	static struct ev_io sigev;
256		442
257	static void	443	static void
258	signals_init (ANSIG *base, int count)	444	signals_init (ANSIG *base, int count)
259	{	445	{
260	while (count--)	446	while (count--)
261	{	447	{
262	base->head = 0;	448	base->head = 0;
263	base->gotsig = 0;	449	base->gotsig = 0;
		450
264	++base;	451	++base;
265	}	452	}
266	}	453	}
267		454
268	static void	455	static void
…		…
270	{	457	{
271	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
272		459
273	if (!gotsig)	460	if (!gotsig)
274	{	461	{
		462	int old_errno = errno;
275	gotsig = 1;	463	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
277	}	466	}
278	}	467	}
279		468
280	static void	469	static void
281	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	471	{
283	struct ev_signal *w;	472	struct ev_watcher_list *w;
284	int sig;	473	int signum;
285		474
		475	read (sigpipe [0], &revents, 1);
286	gotsig = 0;	476	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		477
289	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
291	{	480	{
292	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
293		482
294	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
296	}	485	}
297	}	486	}
298		487
299	static void	488	static void
300	siginit (void)	489	siginit (EV_P)
301	{	490	{
		491	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		494
305	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
308		499
309	evio_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	503	}
312		504
313	/*****************************************************************************/	505	/*****************************************************************************/
314		506
315	static struct ev_idle **idles;	507	#ifndef WIN32
316	static int idlemax, idlecnt;
317		508
318	static struct ev_check **checks;	509	static struct ev_child *childs [PID_HASHSIZE];
319	static int checkmax, checkcnt;	510	static struct ev_signal childev;
		511
		512	#ifndef WCONTINUED
		513	# define WCONTINUED 0
		514	#endif
		515
		516	static void
		517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		518	{
		519	struct ev_child *w;
		520
		521	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		522	if (w->pid == pid \|\| !w->pid)
		523	{
		524	ev_priority (w) = ev_priority (sw); /* need to do it now */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
		534	int pid, status;
		535
		536	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		537	{
		538	/* make sure we are called again until all childs have been reaped */
		539	event (EV_A_ (W)sw, EV_SIGNAL);
		540
		541	child_reap (EV_A_ sw, pid, pid, status);
		542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
		544	}
		545
		546	#endif
320		547
321	/*****************************************************************************/	548	/*****************************************************************************/
322		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
323	#if HAVE_EPOLL	553	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	554	# include "ev_epoll.c"
325	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
326	#if HAVE_SELECT	559	#if EV_USE_SELECT
327	# include "ev_select.c"	560	# include "ev_select.c"
328	#endif	561	#endif
329		562
330	int ev_init (int flags)	563	int
		564	ev_version_major (void)
331	{	565	{
		566	return EV_VERSION_MAJOR;
		567	}
		568
		569	int
		570	ev_version_minor (void)
		571	{
		572	return EV_VERSION_MINOR;
		573	}
		574
		575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
		578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	\|\| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	static void
		594	loop_init (EV_P_ int methods)
		595	{
		596	if (!method)
		597	{
332	#if HAVE_MONOTONIC	598	#if EV_USE_MONOTONIC
333	{	599	{
334	struct timespec ts;	600	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	602	have_monotonic = 1;
337	}	603	}
338	#endif	604	#endif
339		605
340	ev_now = ev_time ();	606	rt_now = ev_time ();
341	now = get_clock ();	607	mn_now = get_clock ();
342	diff = ev_now - now;	608	now_floor = mn_now;
		609	rtmn_diff = rt_now - mn_now;
343		610
		611	if (methods == EVMETHOD_AUTO)
		612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
		615	methods = EVMETHOD_ANY;
		616
		617	method = 0;
		618	#if EV_USE_WIN32
		619	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		620	#endif
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_EPOLL
		625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_SELECT
		631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		632	#endif
		633	}
		634	}
		635
		636	void
		637	loop_destroy (EV_P)
		638	{
		639	#if EV_USE_WIN32
		640	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		647	#endif
		648	#if EV_USE_POLL
		649	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		653	#endif
		654
		655	method = 0;
		656	/TODO/
		657	}
		658
		659	void
		660	loop_fork (EV_P)
		661	{
		662	/TODO/
		663	#if EV_USE_EPOLL
		664	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		665	#endif
		666	#if EV_USE_KQUEUE
		667	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		668	#endif
		669	}
		670
		671	#if EV_MULTIPLICITY
		672	struct ev_loop *
		673	ev_loop_new (int methods)
		674	{
		675	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		676
		677	loop_init (EV_A_ methods);
		678
		679	if (ev_method (EV_A))
		680	return loop;
		681
		682	return 0;
		683	}
		684
		685	void
		686	ev_loop_destroy (EV_P)
		687	{
		688	loop_destroy (EV_A);
		689	free (loop);
		690	}
		691
		692	void
		693	ev_loop_fork (EV_P)
		694	{
		695	loop_fork (EV_A);
		696	}
		697
		698	#endif
		699
		700	#if EV_MULTIPLICITY
		701	struct ev_loop default_loop_struct;
		702	static struct ev_loop *default_loop;
		703
		704	struct ev_loop *
		705	#else
		706	static int default_loop;
		707
		708	int
		709	#endif
		710	ev_default_loop (int methods)
		711	{
		712	if (sigpipe [0] == sigpipe [1])
344	if (pipe (sigpipe))	713	if (pipe (sigpipe))
345	return 0;	714	return 0;
346		715
347	ev_method = EVMETHOD_NONE;	716	if (!default_loop)
348	#if HAVE_EPOLL
349	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
350	#endif
351	#if HAVE_SELECT
352	if (ev_method == EVMETHOD_NONE) select_init (flags);
353	#endif
354
355	if (ev_method)
356	{	717	{
		718	#if EV_MULTIPLICITY
		719	struct ev_loop *loop = default_loop = &default_loop_struct;
		720	#else
		721	default_loop = 1;
		722	#endif
		723
		724	loop_init (EV_A_ methods);
		725
		726	if (ev_method (EV_A))
		727	{
357	evw_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
358	siginit ();	730	siginit (EV_A);
359	}
360		731
361	return ev_method;	732	#ifndef WIN32
362	}	733	ev_signal_init (&childev, childcb, SIGCHLD);
363		734	ev_set_priority (&childev, EV_MAXPRI);
364	/*****************************************************************************/	735	ev_signal_start (EV_A_ &childev);
365		736	ev_unref (EV_A); /* child watcher should not keep loop alive */
366	void ev_prefork (void)
367	{
368	/* nop */
369	}
370
371	void ev_postfork_parent (void)
372	{
373	/* nop */
374	}
375
376	void ev_postfork_child (void)
377	{
378	#if HAVE_EPOLL
379	if (ev_method == EVMETHOD_EPOLL)
380	epoll_postfork_child ();
381	#endif	737	#endif
		738	}
		739	else
		740	default_loop = 0;
		741	}
382		742
		743	return default_loop;
		744	}
		745
		746	void
		747	ev_default_destroy (void)
		748	{
		749	#if EV_MULTIPLICITY
		750	struct ev_loop *loop = default_loop;
		751	#endif
		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
383	evio_stop (&sigev);	757	ev_io_stop (EV_A_ &sigev);
		758
		759	close (sigpipe [0]); sigpipe [0] = 0;
		760	close (sigpipe [1]); sigpipe [1] = 0;
		761
		762	loop_destroy (EV_A);
		763	}
		764
		765	void
		766	ev_default_fork (void)
		767	{
		768	#if EV_MULTIPLICITY
		769	struct ev_loop *loop = default_loop;
		770	#endif
		771
		772	loop_fork (EV_A);
		773
		774	ev_io_stop (EV_A_ &sigev);
384	close (sigpipe [0]);	775	close (sigpipe [0]);
385	close (sigpipe [1]);	776	close (sigpipe [1]);
386	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
387	siginit ();	780	siginit (EV_A);
388	}	781	}
389		782
390	/*****************************************************************************/	783	/*****************************************************************************/
391		784
392	static void	785	static void
393	fd_reify (void)	786	call_pending (EV_P)
394	{	787	{
395	int i;	788	int pri;
396		789
397	for (i = 0; i < fdchangecnt; ++i)	790	for (pri = NUMPRI; pri--; )
398	{	791	while (pendingcnt [pri])
399	int fd = fdchanges [i];
400	ANFD *anfd = anfds + fd;
401	struct ev_io *w;
402
403	int wev = 0;
404
405	for (w = anfd->head; w; w = w->next)
406	wev \|= w->events;
407
408	if (anfd->wev != wev)
409	{	792	{
410	method_modify (fd, anfd->wev, wev);	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
411	anfd->wev = wev;
412	}
413	}
414		794
415	fdchangecnt = 0;
416	}
417
418	static void
419	call_pending ()
420	{
421	int i;
422
423	for (i = 0; i < pendingcnt; ++i)
424	{
425	ANPENDING *p = pendings + i;
426
427	if (p->w)	795	if (p->w)
428	{	796	{
429	p->w->pending = 0;	797	p->w->pending = 0;
430	p->w->cb (p->w, p->events);	798
		799	((void (*)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
431	}	800	}
432	}	801	}
433
434	pendingcnt = 0;
435	}	802	}
436		803
437	static void	804	static void
438	timers_reify ()	805	timers_reify (EV_P)
439	{	806	{
440	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
441	{	808	{
442	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
443		810
444	event ((W)w, EV_TIMEOUT);	811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
445		812
446	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
447	if (w->repeat)	814	if (w->repeat)
448	{	815	{
		816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
449	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
450	assert (("timer timeout in the past, negative repeat?", w->at > now));
451	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
452	}	819	}
453	else	820	else
454	evtimer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
455	}
456	}
457		822
		823	event (EV_A_ (W)w, EV_TIMEOUT);
		824	}
		825	}
		826
458	static void	827	static void
459	periodics_reify ()	828	periodics_reify (EV_P)
460	{	829	{
461	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
462	{	831	{
463	struct ev_periodic *w = periodics [0];	832	struct ev_periodic *w = periodics [0];
		833
		834	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
464		835
465	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
466	if (w->interval)	837	if (w->interval)
467	{	838	{
468	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	839	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
469	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	840	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
470	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
471	}	842	}
472	else	843	else
473	evperiodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
474		845
475	event ((W)w, EV_TIMEOUT);	846	event (EV_A_ (W)w, EV_PERIODIC);
476	}	847	}
477	}	848	}
478		849
479	static void	850	static void
480	periodics_reschedule (ev_tstamp diff)	851	periodics_reschedule (EV_P)
481	{	852	{
482	int i;	853	int i;
483		854
484	/* adjust periodics after time jump */	855	/* adjust periodics after time jump */
485	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
486	{	857	{
487	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
488		859
489	if (w->interval)	860	if (w->interval)
490	{	861	{
491	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	862	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
492		863
493	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
494	{	865	{
495	evperiodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
496	evperiodic_start (w);	867	ev_periodic_start (EV_A_ w);
497		868
498	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
499	}	870	}
500	}	871	}
501	}	872	}
502	}	873	}
503		874
		875	inline int
		876	time_update_monotonic (EV_P)
		877	{
		878	mn_now = get_clock ();
		879
		880	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		881	{
		882	rt_now = rtmn_diff + mn_now;
		883	return 0;
		884	}
		885	else
		886	{
		887	now_floor = mn_now;
		888	rt_now = ev_time ();
		889	return 1;
		890	}
		891	}
		892
504	static void	893	static void
505	time_update ()	894	time_update (EV_P)
506	{	895	{
507	int i;	896	int i;
508		897
509	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
510
511	if (have_monotonic)	899	if (expect_true (have_monotonic))
512	{	900	{
513	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
514
515	for (i = 4; --i; ) /* loop a few times, before making important decisions */
516	{	902	{
517	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
518	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
519		908
520	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
521	return; /* all is well */	910	return; /* all is well */
522		911
523	ev_now = ev_time ();	912	rt_now = ev_time ();
		913	mn_now = get_clock ();
		914	now_floor = mn_now;
		915	}
		916
		917	periodics_reschedule (EV_A);
		918	/* no timer adjustment, as the monotonic clock doesn't jump */
		919	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
524	}	920	}
525
526	periodics_reschedule (diff - odiff);
527	/* no timer adjustment, as the monotonic clock doesn't jump */
528	}	921	}
529	else	922	else
		923	#endif
530	{	924	{
531	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	925	rt_now = ev_time ();
		926
		927	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
532	{	928	{
533	periodics_reschedule (ev_now - now);	929	periodics_reschedule (EV_A);
534		930
535	/* adjust timers. this is easy, as the offset is the same for all */	931	/* adjust timers. this is easy, as the offset is the same for all */
536	for (i = 0; i < timercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
537	timers [i]->at += diff;	933	((WT)timers [i])->at += rt_now - mn_now;
538	}	934	}
539		935
540	now = ev_now;	936	mn_now = rt_now;
541	}	937	}
542	}	938	}
543		939
544	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
545		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
546	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
547	{	956	{
548	double block;	957	double block;
549	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	958	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
550
551	if (checkcnt)
552	{
553	queue_events ((W *)checks, checkcnt, EV_CHECK);
554	call_pending ();
555	}
556		959
557	do	960	do
558	{	961	{
		962	/* queue check watchers (and execute them) */
		963	if (expect_false (preparecnt))
		964	{
		965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		966	call_pending (EV_A);
		967	}
		968
559	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
560	fd_reify ();	970	fd_reify (EV_A);
561		971
562	/* calculate blocking time */	972	/* calculate blocking time */
563		973
564	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	974	/* we only need this for !monotonic clockor timers, but as we basically
		975	always have timers, we just calculate it always */
		976	#if EV_USE_MONOTONIC
		977	if (expect_true (have_monotonic))
		978	time_update_monotonic (EV_A);
		979	else
		980	#endif
		981	{
565	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
566		985
567	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	986	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
568	block = 0.;	987	block = 0.;
569	else	988	else
570	{	989	{
571	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
572		991
573	if (timercnt)	992	if (timercnt)
574	{	993	{
575	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	994	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
576	if (block > to) block = to;	995	if (block > to) block = to;
577	}	996	}
578		997
579	if (periodiccnt)	998	if (periodiccnt)
580	{	999	{
581	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
582	if (block > to) block = to;	1001	if (block > to) block = to;
583	}	1002	}
584		1003
585	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
586	}	1005	}
587		1006
588	method_poll (block);	1007	method_poll (EV_A_ block);
589		1008
590	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
591	time_update ();	1010	time_update (EV_A);
592		1011
593	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
		1013	timers_reify (EV_A); /* relative timers called last */
594	periodics_reify (); /* absolute timers first */	1014	periodics_reify (EV_A); /* absolute timers called first */
595	timers_reify (); /* relative timers second */
596		1015
597	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
598	if (!pendingcnt)	1017	if (!pendingcnt)
599	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
600		1019
601	/* queue check and possibly idle watchers */	1020	/* queue check watchers, to be executed first */
		1021	if (checkcnt)
602	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
603		1023
604	call_pending ();	1024	call_pending (EV_A);
605	}	1025	}
606	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
607		1027
608	if (ev_loop_done != 2)	1028	if (loop_done != 2)
609	ev_loop_done = 0;	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
610	}	1036	}
611		1037
612	/*****************************************************************************/	1038	/*****************************************************************************/
613		1039
614	static void	1040	inline void
615	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
616	{	1042	{
617	elem->next = *head;	1043	elem->next = *head;
618	*head = elem;	1044	*head = elem;
619	}	1045	}
620		1046
621	static void	1047	inline void
622	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
623	{	1049	{
624	while (*head)	1050	while (*head)
625	{	1051	{
626	if (*head == elem)	1052	if (*head == elem)
…		…
631		1057
632	head = &(*head)->next;	1058	head = &(*head)->next;
633	}	1059	}
634	}	1060	}
635		1061
636	static void	1062	inline void
637	ev_clear (W w)	1063	ev_clear_pending (EV_P_ W w)
638	{	1064	{
639	if (w->pending)	1065	if (w->pending)
640	{	1066	{
641	pendings [w->pending - 1].w = 0;	1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
642	w->pending = 0;	1068	w->pending = 0;
643	}	1069	}
644	}	1070	}
645		1071
646	static void	1072	inline void
647	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
648	{	1074	{
		1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
649	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
650	}	1080	}
651		1081
652	static void	1082	inline void
653	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
654	{	1084	{
		1085	ev_unref (EV_A);
655	w->active = 0;	1086	w->active = 0;
656	}	1087	}
657		1088
658	/*****************************************************************************/	1089	/*****************************************************************************/
659		1090
660	void	1091	void
661	evio_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
662	{	1093	{
		1094	int fd = w->fd;
		1095
663	if (ev_is_active (w))	1096	if (ev_is_active (w))
664	return;	1097	return;
665		1098
666	int fd = w->fd;	1099	assert (("ev_io_start called with negative fd", fd >= 0));
667		1100
668	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
669	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
670	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
671		1104
672	++fdchangecnt;	1105	fd_change (EV_A_ fd);
673	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
674	fdchanges [fdchangecnt - 1] = fd;
675	}	1106	}
676		1107
677	void	1108	void
678	evio_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
679	{	1110	{
680	ev_clear ((W)w);	1111	ev_clear_pending (EV_A_ (W)w);
681	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
682	return;	1113	return;
683		1114
684	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
685	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
686		1117
687	++fdchangecnt;	1118	fd_change (EV_A_ w->fd);
688	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
689	fdchanges [fdchangecnt - 1] = w->fd;
690	}	1119	}
691		1120
692	void	1121	void
693	evtimer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
694	{	1123	{
695	if (ev_is_active (w))	1124	if (ev_is_active (w))
696	return;	1125	return;
697		1126
698	w->at += now;	1127	((WT)w)->at += mn_now;
699		1128
700	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1129	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
701		1130
702	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
703	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
704	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
705	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
706	}
707		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
708	void	1139	void
709	evtimer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
710	{	1141	{
711	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
712	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
713	return;	1144	return;
714		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
715	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
716	{	1149	{
717	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
718	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
719	}	1152	}
720		1153
721	w->at = w->repeat;	1154	((WT)w)->at = w->repeat;
722		1155
723	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
724	}	1157	}
725		1158
726	void	1159	void
727	evtimer_again (struct ev_timer *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
728	{	1161	{
729	if (ev_is_active (w))	1162	if (ev_is_active (w))
730	{	1163	{
731	if (w->repeat)	1164	if (w->repeat)
732	{	1165	{
733	w->at = now + w->repeat;	1166	((WT)w)->at = mn_now + w->repeat;
734	downheap ((WT *)timers, timercnt, w->active - 1);	1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
735	}	1168	}
736	else	1169	else
737	evtimer_stop (w);	1170	ev_timer_stop (EV_A_ w);
738	}	1171	}
739	else if (w->repeat)	1172	else if (w->repeat)
740	evtimer_start (w);	1173	ev_timer_start (EV_A_ w);
741	}	1174	}
742		1175
743	void	1176	void
744	evperiodic_start (struct ev_periodic *w)	1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
745	{	1178	{
746	if (ev_is_active (w))	1179	if (ev_is_active (w))
747	return;	1180	return;
748		1181
749	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1182	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
750		1183
751	/* this formula differs from the one in periodic_reify because we do not always round up */	1184	/* this formula differs from the one in periodic_reify because we do not always round up */
752	if (w->interval)	1185	if (w->interval)
753	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1186	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
754		1187
755	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
756	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
757	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
758	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
759	}
760		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
761	void	1196	void
762	evperiodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
763	{	1198	{
764	ev_clear ((W)w);	1199	ev_clear_pending (EV_A_ (W)w);
765	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
766	return;	1201	return;
767		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
768	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
769	{	1206	{
770	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
771	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
772	}	1209	}
773		1210
774	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
775	}	1212	}
776		1213
777	void	1214	void
778	evsignal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
779	{	1216	{
780	if (ev_is_active (w))	1217	if (ev_is_active (w))
781	return;	1218	return;
782		1219
		1220	ev_start (EV_A_ (W)w, ++idlecnt);
		1221	array_needsize (idles, idlemax, idlecnt, );
		1222	idles [idlecnt - 1] = w;
		1223	}
		1224
		1225	void
		1226	ev_idle_stop (EV_P_ struct ev_idle *w)
		1227	{
		1228	ev_clear_pending (EV_A_ (W)w);
		1229	if (ev_is_active (w))
		1230	return;
		1231
		1232	idles [((W)w)->active - 1] = idles [--idlecnt];
		1233	ev_stop (EV_A_ (W)w);
		1234	}
		1235
		1236	void
		1237	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1238	{
		1239	if (ev_is_active (w))
		1240	return;
		1241
		1242	ev_start (EV_A_ (W)w, ++preparecnt);
		1243	array_needsize (prepares, preparemax, preparecnt, );
		1244	prepares [preparecnt - 1] = w;
		1245	}
		1246
		1247	void
		1248	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1249	{
		1250	ev_clear_pending (EV_A_ (W)w);
		1251	if (ev_is_active (w))
		1252	return;
		1253
		1254	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1255	ev_stop (EV_A_ (W)w);
		1256	}
		1257
		1258	void
		1259	ev_check_start (EV_P_ struct ev_check *w)
		1260	{
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	ev_start (EV_A_ (W)w, ++checkcnt);
		1265	array_needsize (checks, checkmax, checkcnt, );
		1266	checks [checkcnt - 1] = w;
		1267	}
		1268
		1269	void
		1270	ev_check_stop (EV_P_ struct ev_check *w)
		1271	{
		1272	ev_clear_pending (EV_A_ (W)w);
		1273	if (ev_is_active (w))
		1274	return;
		1275
		1276	checks [((W)w)->active - 1] = checks [--checkcnt];
		1277	ev_stop (EV_A_ (W)w);
		1278	}
		1279
		1280	#ifndef SA_RESTART
		1281	# define SA_RESTART 0
		1282	#endif
		1283
		1284	void
		1285	ev_signal_start (EV_P_ struct ev_signal *w)
		1286	{
		1287	#if EV_MULTIPLICITY
		1288	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1289	#endif
		1290	if (ev_is_active (w))
		1291	return;
		1292
		1293	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1294
783	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
784	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
785	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
786		1298
787	if (!w->next)	1299	if (!((WL)w)->next)
788	{	1300	{
789	struct sigaction sa;	1301	struct sigaction sa;
790	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
791	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
792	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
793	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
794	}	1306	}
795	}	1307	}
796		1308
797	void	1309	void
798	evsignal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
799	{	1311	{
800	ev_clear ((W)w);	1312	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
802	return;	1314	return;
803		1315
804	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
805	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
806		1318
807	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
808	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
809	}	1321	}
810		1322
811	void evidle_start (struct ev_idle *w)	1323	void
		1324	ev_child_start (EV_P_ struct ev_child *w)
812	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
813	if (ev_is_active (w))	1329	if (ev_is_active (w))
814	return;	1330	return;
815		1331
816	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
817	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
818	idles [idlecnt - 1] = w;
819	}	1334	}
820		1335
821	void evidle_stop (struct ev_idle *w)	1336	void
		1337	ev_child_stop (EV_P_ struct ev_child *w)
822	{	1338	{
823	ev_clear ((W)w);	1339	ev_clear_pending (EV_A_ (W)w);
824	if (ev_is_active (w))	1340	if (ev_is_active (w))
825	return;	1341	return;
826		1342
827	idles [w->active - 1] = idles [--idlecnt];	1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
828	ev_stop ((W)w);	1344	ev_stop (EV_A_ (W)w);
829	}
830
831	void evcheck_start (struct ev_check *w)
832	{
833	if (ev_is_active (w))
834	return;
835
836	ev_start ((W)w, ++checkcnt);
837	array_needsize (checks, checkmax, checkcnt, );
838	checks [checkcnt - 1] = w;
839	}
840
841	void evcheck_stop (struct ev_check *w)
842	{
843	ev_clear ((W)w);
844	if (ev_is_active (w))
845	return;
846
847	checks [w->active - 1] = checks [--checkcnt];
848	ev_stop ((W)w);
849	}	1345	}
850		1346
851	/*****************************************************************************/	1347	/*****************************************************************************/
852		1348
853	struct ev_once	1349	struct ev_once
…		…
857	void (cb)(int revents, void arg);	1353	void (cb)(int revents, void arg);
858	void *arg;	1354	void *arg;
859	};	1355	};
860		1356
861	static void	1357	static void
862	once_cb (struct ev_once *once, int revents)	1358	once_cb (EV_P_ struct ev_once *once, int revents)
863	{	1359	{
864	void (cb)(int revents, void arg) = once->cb;	1360	void (cb)(int revents, void arg) = once->cb;
865	void *arg = once->arg;	1361	void *arg = once->arg;
866		1362
867	evio_stop (&once->io);	1363	ev_io_stop (EV_A_ &once->io);
868	evtimer_stop (&once->to);	1364	ev_timer_stop (EV_A_ &once->to);
869	free (once);	1365	free (once);
870		1366
871	cb (revents, arg);	1367	cb (revents, arg);
872	}	1368	}
873		1369
874	static void	1370	static void
875	once_cb_io (struct ev_io *w, int revents)	1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
876	{	1372	{
877	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1373	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
878	}	1374	}
879		1375
880	static void	1376	static void
881	once_cb_to (struct ev_timer *w, int revents)	1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
882	{	1378	{
883	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1379	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
884	}	1380	}
885		1381
886	void	1382	void
887	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1383	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
888	{	1384	{
889	struct ev_once *once = malloc (sizeof (struct ev_once));	1385	struct ev_once *once = malloc (sizeof (struct ev_once));
890		1386
891	if (!once)	1387	if (!once)
892	cb (EV_ERROR, arg);	1388	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
893	else	1389	else
894	{	1390	{
895	once->cb = cb;	1391	once->cb = cb;
896	once->arg = arg;	1392	once->arg = arg;
897		1393
898	evw_init (&once->io, once_cb_io);	1394	ev_watcher_init (&once->io, once_cb_io);
899
900	if (fd >= 0)	1395	if (fd >= 0)
901	{	1396	{
902	evio_set (&once->io, fd, events);	1397	ev_io_set (&once->io, fd, events);
903	evio_start (&once->io);	1398	ev_io_start (EV_A_ &once->io);
904	}	1399	}
905		1400
906	evw_init (&once->to, once_cb_to);	1401	ev_watcher_init (&once->to, once_cb_to);
907
908	if (timeout >= 0.)	1402	if (timeout >= 0.)
909	{	1403	{
910	evtimer_set (&once->to, timeout, 0.);	1404	ev_timer_set (&once->to, timeout, 0.);
911	evtimer_start (&once->to);	1405	ev_timer_start (EV_A_ &once->to);
912	}	1406	}
913	}	1407	}
914	}	1408	}
915		1409
916	/*****************************************************************************/
917
918	#if 0
919
920	struct ev_io wio;
921
922	static void
923	sin_cb (struct ev_io *w, int revents)
924	{
925	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
926	}
927
928	static void
929	ocb (struct ev_timer *w, int revents)
930	{
931	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
932	evtimer_stop (w);
933	evtimer_start (w);
934	}
935
936	static void
937	scb (struct ev_signal *w, int revents)
938	{
939	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
940	evio_stop (&wio);
941	evio_start (&wio);
942	}
943
944	static void
945	gcb (struct ev_signal *w, int revents)
946	{
947	fprintf (stderr, "generic %x\n", revents);
948
949	}
950
951	int main (void)
952	{
953	ev_init (0);
954
955	evio_init (&wio, sin_cb, 0, EV_READ);
956	evio_start (&wio);
957
958	struct ev_timer t[10000];
959
960	#if 0
961	int i;
962	for (i = 0; i < 10000; ++i)
963	{
964	struct ev_timer *w = t + i;
965	evw_init (w, ocb, i);
966	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
967	evtimer_start (w);
968	if (drand48 () < 0.5)
969	evtimer_stop (w);
970	}
971	#endif
972
973	struct ev_timer t1;
974	evtimer_init (&t1, ocb, 5, 10);
975	evtimer_start (&t1);
976
977	struct ev_signal sig;
978	evsignal_init (&sig, scb, SIGQUIT);
979	evsignal_start (&sig);
980
981	struct ev_check cw;
982	evcheck_init (&cw, gcb);
983	evcheck_start (&cw);
984
985	struct ev_idle iw;
986	evidle_init (&iw, gcb);
987	evidle_start (&iw);
988
989	ev_loop (0);
990
991	return 0;
992	}
993
994	#endif
995
996
997
998

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Comparing libev/ev.c (file contents): Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs. Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.17 by root, Wed Oct 31 14:44:15 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC