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

Comparing libev/ev.c (file contents):
Revision 1.20 by root, Wed Oct 31 18:28:00 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
		75	/**/
		76
44	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
45	# ifdef CLOCK_MONOTONIC
46	# 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
47	# endif	102	# endif
48	#endif	103	#endif
49		104
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
60	#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	/**/
61		122
62	#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) */
63	#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 */
64		127
65	#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)
66		143
67	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
70		147
71	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74
75	static int have_monotonic; /* runtime */
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		149
81	/*****************************************************************************/	150	/*****************************************************************************/
82		151
83	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
84	ev_time (void)	186	ev_time (void)
85	{	187	{
86	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
87	struct timespec ts;	189	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	192	#else
91	struct timeval tv;	193	struct timeval tv;
92	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	196	#endif
95	}	197	}
96		198
97	static ev_tstamp	199	inline ev_tstamp
98	get_clock (void)	200	get_clock (void)
99	{	201	{
100	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
101	if (have_monotonic)	203	if (expect_true (have_monotonic))
102	{	204	{
103	struct timespec ts;	205	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	208	}
107	#endif	209	#endif
108		210
109	return ev_time ();	211	return ev_time ();
110	}	212	}
111		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
112	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
114	{ \	224	{ \
115	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	\
116	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
117	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	234	cur = newcnt; \
119	}	235	}
120		236
121	/*****************************************************************************/	237	/*****************************************************************************/
122		238
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	239	static void
136	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
137	{	241	{
138	while (count--)	242	while (count--)
139	{	243	{
140	base->head = 0;	244	base->head = 0;
141	base->wev = base->rev = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
142	++base;	248	++base;
143	}	249	}
144	}	250	}
145		251
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void	252	static void
156	event (W w, int events)	253	event (EV_P_ W w, int events)
157	{	254	{
158	if (w->active)	255	if (w->pending)
159	{	256	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		258	return;
164	}	259	}
165	}
166		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
167	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
168	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
169	{	278	{
170	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	280	struct ev_io *w;
172		281
173	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
174	{	283	{
175	int ev = w->events & events;	284	int ev = w->events & events;
176		285
177	if (ev)	286	if (ev)
178	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
179	}	288	}
180	}	289	}
181		290
		291	/*****************************************************************************/
		292
182	static void	293	static void
183	queue_events (W *events, int eventcnt, int type)	294	fd_reify (EV_P)
184	{	295	{
185	int i;	296	int i;
186		297
187	for (i = 0; i < eventcnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
188	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	}
189	}	341	}
190		342
191	/* called on EBADF to verify fds */	343	/* called on EBADF to verify fds */
192	static void	344	static void
193	fd_recheck ()	345	fd_ebadf (EV_P)
194	{	346	{
195	int fd;	347	int fd;
196		348
197	for (fd = 0; fd < anfdmax; ++fd)	349	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	350	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	352	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	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	}
202	}	383	}
203		384
204	/*****************************************************************************/	385	/*****************************************************************************/
205		386
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	387	static void
213	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
214	{	389	{
215	WT w = timers [k];	390	WT w = heap [k];
216		391
217	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
218	{	393	{
219	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
221	k >>= 1;	396	k >>= 1;
222	}	397	}
223		398
224	timers [k] = w;	399	heap [k] = w;
225	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
226		401
227	}	402	}
228		403
229	static void	404	static void
230	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
231	{	406	{
232	WT w = timers [k];	407	WT w = heap [k];
233		408
234	while (k < (N >> 1))	409	while (k < (N >> 1))
235	{	410	{
236	int j = k << 1;	411	int j = k << 1;
237		412
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	414	++j;
240		415
241	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
242	break;	417	break;
243		418
244	timers [k] = timers [j];	419	heap [k] = heap [j];
245	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
246	k = j;	421	k = j;
247	}	422	}
248		423
249	timers [k] = w;	424	heap [k] = w;
250	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
251	}	426	}
252		427
253	/*****************************************************************************/	428	/*****************************************************************************/
254		429
255	typedef struct	430	typedef struct
256	{	431	{
257	struct ev_signal *head;	432	struct ev_watcher_list *head;
258	sig_atomic_t gotsig;	433	sig_atomic_t volatile gotsig;
259	} ANSIG;	434	} ANSIG;
260		435
261	static ANSIG *signals;	436	static ANSIG *signals;
262	static int signalmax;	437	static int signalmax;
263		438
264	static int sigpipe [2];	439	static int sigpipe [2];
265	static sig_atomic_t gotsig;	440	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;	441	static struct ev_io sigev;
267		442
268	static void	443	static void
269	signals_init (ANSIG *base, int count)	444	signals_init (ANSIG *base, int count)
270	{	445	{
271	while (count--)	446	while (count--)
272	{	447	{
273	base->head = 0;	448	base->head = 0;
274	base->gotsig = 0;	449	base->gotsig = 0;
		450
275	++base;	451	++base;
276	}	452	}
277	}	453	}
278		454
279	static void	455	static void
…		…
281	{	457	{
282	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
283		459
284	if (!gotsig)	460	if (!gotsig)
285	{	461	{
		462	int old_errno = errno;
286	gotsig = 1;	463	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
288	}	466	}
289	}	467	}
290		468
291	static void	469	static void
292	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	471	{
294	struct ev_signal *w;	472	struct ev_watcher_list *w;
295	int sig;	473	int signum;
296		474
		475	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	476	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		477
300	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
302	{	480	{
303	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
304		482
305	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
307	}	485	}
308	}	486	}
309		487
310	static void	488	static void
311	siginit (void)	489	siginit (EV_P)
312	{	490	{
		491	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		494
316	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
319		499
320	evio_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	503	}
323		504
324	/*****************************************************************************/	505	/*****************************************************************************/
325		506
326	static struct ev_idle **idles;	507	#ifndef WIN32
327	static int idlemax, idlecnt;
328		508
329	static struct ev_prepare **prepares;	509	static struct ev_child *childs [PID_HASHSIZE];
330	static int preparemax, preparecnt;	510	static struct ev_signal childev;
331		511
332	static struct ev_check **checks;	512	#ifndef WCONTINUED
333	static int checkmax, checkcnt;	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
334		547
335	/*****************************************************************************/	548	/*****************************************************************************/
336		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
337	#if HAVE_EPOLL	553	#if EV_USE_EPOLL
338	# include "ev_epoll.c"	554	# include "ev_epoll.c"
339	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
340	#if HAVE_SELECT	559	#if EV_USE_SELECT
341	# include "ev_select.c"	560	# include "ev_select.c"
342	#endif	561	#endif
343		562
344	int ev_init (int flags)	563	int
		564	ev_version_major (void)
345	{	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	{
346	#if HAVE_MONOTONIC	598	#if EV_USE_MONOTONIC
347	{	599	{
348	struct timespec ts;	600	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;	602	have_monotonic = 1;
351	}	603	}
352	#endif	604	#endif
353		605
354	ev_now = ev_time ();	606	rt_now = ev_time ();
355	now = get_clock ();	607	mn_now = get_clock ();
356	diff = ev_now - now;	608	now_floor = mn_now;
		609	rtmn_diff = rt_now - mn_now;
357		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])
358	if (pipe (sigpipe))	713	if (pipe (sigpipe))
359	return 0;	714	return 0;
360		715
361	ev_method = EVMETHOD_NONE;	716	if (!default_loop)
362	#if HAVE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
364	#endif
365	#if HAVE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);
367	#endif
368
369	if (ev_method)
370	{	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	{
371	evw_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
372	siginit ();	730	siginit (EV_A);
373	}
374		731
375	return ev_method;	732	#ifndef WIN32
376	}	733	ev_signal_init (&childev, childcb, SIGCHLD);
377		734	ev_set_priority (&childev, EV_MAXPRI);
378	/*****************************************************************************/	735	ev_signal_start (EV_A_ &childev);
379		736	ev_unref (EV_A); /* child watcher should not keep loop alive */
380	void ev_prefork (void)
381	{
382	/* nop */
383	}
384
385	void ev_postfork_parent (void)
386	{
387	/* nop */
388	}
389
390	void ev_postfork_child (void)
391	{
392	#if HAVE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();
395	#endif	737	#endif
		738	}
		739	else
		740	default_loop = 0;
		741	}
396		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 */
397	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);
398	close (sigpipe [0]);	775	close (sigpipe [0]);
399	close (sigpipe [1]);	776	close (sigpipe [1]);
400	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
401	siginit ();	780	siginit (EV_A);
402	}	781	}
403		782
404	/*****************************************************************************/	783	/*****************************************************************************/
405		784
406	static void	785	static void
407	fd_reify (void)	786	call_pending (EV_P)
408	{	787	{
409	int i;	788	int pri;
410		789
411	for (i = 0; i < fdchangecnt; ++i)	790	for (pri = NUMPRI; pri--; )
412	{	791	while (pendingcnt [pri])
413	int fd = fdchanges [i];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416
417	int wev = 0;
418
419	for (w = anfd->head; w; w = w->next)
420	wev \|= w->events;
421
422	if (anfd->wev != wev)
423	{	792	{
424	method_modify (fd, anfd->wev, wev);
425	anfd->wev = wev;
426	}
427	}
428
429	fdchangecnt = 0;
430	}
431
432	static void
433	call_pending ()
434	{
435	while (pendingcnt)
436	{
437	ANPENDING *p = pendings + --pendingcnt;	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
438		794
439	if (p->w)	795	if (p->w)
440	{	796	{
441	p->w->pending = 0;	797	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	798
		799	((void (*)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
443	}	800	}
444	}	801	}
445	}	802	}
446		803
447	static void	804	static void
448	timers_reify ()	805	timers_reify (EV_P)
449	{	806	{
450	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
451	{	808	{
452	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
453		810
454	event ((W)w, EV_TIMEOUT);	811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
455		812
456	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
457	if (w->repeat)	814	if (w->repeat)
458	{	815	{
		816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
459	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));
461	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
462	}	819	}
463	else	820	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		822
		823	event (EV_A_ (W)w, EV_TIMEOUT);
		824	}
		825	}
		826
468	static void	827	static void
469	periodics_reify ()	828	periodics_reify (EV_P)
470	{	829	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
472	{	831	{
473	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)));
474		835
475	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
476	if (w->interval)	837	if (w->interval)
477	{	838	{
478	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;
479	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));
480	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
481	}	842	}
482	else	843	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		845
485	event ((W)w, EV_TIMEOUT);	846	event (EV_A_ (W)w, EV_PERIODIC);
486	}	847	}
487	}	848	}
488		849
489	static void	850	static void
490	periodics_reschedule (ev_tstamp diff)	851	periodics_reschedule (EV_P)
491	{	852	{
492	int i;	853	int i;
493		854
494	/* adjust periodics after time jump */	855	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
496	{	857	{
497	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
498		859
499	if (w->interval)	860	if (w->interval)
500	{	861	{
501	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;
502		863
503	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
504	{	865	{
505	evperiodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
506	evperiodic_start (w);	867	ev_periodic_start (EV_A_ w);
507		868
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
509	}	870	}
510	}	871	}
511	}	872	}
512	}	873	}
513		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
514	static void	893	static void
515	time_update ()	894	time_update (EV_P)
516	{	895	{
517	int i;	896	int i;
518		897
519	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
520
521	if (have_monotonic)	899	if (expect_true (have_monotonic))
522	{	900	{
523	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	902	{
527	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
528	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
529		908
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531	return; /* all is well */	910	return; /* all is well */
532		911
533	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) */
534	}	920	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}	921	}
539	else	922	else
		923	#endif
540	{	924	{
541	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))
542	{	928	{
543	periodics_reschedule (ev_now - now);	929	periodics_reschedule (EV_A);
544		930
545	/* 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 */
546	for (i = 0; i < timercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	933	((WT)timers [i])->at += rt_now - mn_now;
548	}	934	}
549		935
550	now = ev_now;	936	mn_now = rt_now;
551	}	937	}
552	}	938	}
553		939
554	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
555		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
556	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
557	{	956	{
558	double block;	957	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	958	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
560		959
561	do	960	do
562	{	961	{
563	/* queue check watchers (and execute them) */	962	/* queue check watchers (and execute them) */
564	if (checkcnt)	963	if (expect_false (preparecnt))
565	{	964	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	966	call_pending (EV_A);
568	}	967	}
569		968
570	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
571	fd_reify ();	970	fd_reify (EV_A);
572		971
573	/* calculate blocking time */	972	/* calculate blocking time */
574		973
575	/* 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	{
576	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
577		985
578	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	986	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
579	block = 0.;	987	block = 0.;
580	else	988	else
581	{	989	{
582	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
583		991
584	if (timercnt)	992	if (timercnt)
585	{	993	{
586	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;
587	if (block > to) block = to;	995	if (block > to) block = to;
588	}	996	}
589		997
590	if (periodiccnt)	998	if (periodiccnt)
591	{	999	{
592	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
593	if (block > to) block = to;	1001	if (block > to) block = to;
594	}	1002	}
595		1003
596	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
597	}	1005	}
598		1006
599	method_poll (block);	1007	method_poll (EV_A_ block);
600		1008
601	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
602	time_update ();	1010	time_update (EV_A);
603		1011
604	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
605	timers_reify (); /* relative timers called last */	1013	timers_reify (EV_A); /* relative timers called last */
606	periodics_reify (); /* absolute timers called first */	1014	periodics_reify (EV_A); /* absolute timers called first */
607		1015
608	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
609	if (!pendingcnt)	1017	if (!pendingcnt)
610	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
611		1019
612	/* queue check watchers, to be executed first */	1020	/* queue check watchers, to be executed first */
613	if (checkcnt)	1021	if (checkcnt)
614	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
615		1023
616	call_pending ();	1024	call_pending (EV_A);
617	}	1025	}
618	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
619		1027
620	if (ev_loop_done != 2)	1028	if (loop_done != 2)
621	ev_loop_done = 0;	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
622	}	1036	}
623		1037
624	/*****************************************************************************/	1038	/*****************************************************************************/
625		1039
626	static void	1040	inline void
627	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
628	{	1042	{
629	elem->next = *head;	1043	elem->next = *head;
630	*head = elem;	1044	*head = elem;
631	}	1045	}
632		1046
633	static void	1047	inline void
634	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
635	{	1049	{
636	while (*head)	1050	while (*head)
637	{	1051	{
638	if (*head == elem)	1052	if (*head == elem)
…		…
643		1057
644	head = &(*head)->next;	1058	head = &(*head)->next;
645	}	1059	}
646	}	1060	}
647		1061
648	static void	1062	inline void
649	ev_clear (W w)	1063	ev_clear_pending (EV_P_ W w)
650	{	1064	{
651	if (w->pending)	1065	if (w->pending)
652	{	1066	{
653	pendings [w->pending - 1].w = 0;	1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
654	w->pending = 0;	1068	w->pending = 0;
655	}	1069	}
656	}	1070	}
657		1071
658	static void	1072	inline void
659	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
660	{	1074	{
		1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
661	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
662	}	1080	}
663		1081
664	static void	1082	inline void
665	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
666	{	1084	{
		1085	ev_unref (EV_A);
667	w->active = 0;	1086	w->active = 0;
668	}	1087	}
669		1088
670	/*****************************************************************************/	1089	/*****************************************************************************/
671		1090
672	void	1091	void
673	evio_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
674	{	1093	{
		1094	int fd = w->fd;
		1095
675	if (ev_is_active (w))	1096	if (ev_is_active (w))
676	return;	1097	return;
677		1098
678	int fd = w->fd;	1099	assert (("ev_io_start called with negative fd", fd >= 0));
679		1100
680	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
681	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
682	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
683		1104
684	++fdchangecnt;	1105	fd_change (EV_A_ fd);
685	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
686	fdchanges [fdchangecnt - 1] = fd;
687	}	1106	}
688		1107
689	void	1108	void
690	evio_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
691	{	1110	{
692	ev_clear ((W)w);	1111	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
694	return;	1113	return;
695		1114
696	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
697	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
698		1117
699	++fdchangecnt;	1118	fd_change (EV_A_ w->fd);
700	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
701	fdchanges [fdchangecnt - 1] = w->fd;
702	}	1119	}
703		1120
704	void	1121	void
705	evtimer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
706	{	1123	{
707	if (ev_is_active (w))	1124	if (ev_is_active (w))
708	return;	1125	return;
709		1126
710	w->at += now;	1127	((WT)w)->at += mn_now;
711		1128
712	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.));
713		1130
714	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
715	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
716	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
717	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
718	}
719		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
720	void	1139	void
721	evtimer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
722	{	1141	{
723	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
724	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
725	return;	1144	return;
726		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
727	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
728	{	1149	{
729	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
730	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1152	}
732		1153
733	w->at = w->repeat;	1154	((WT)w)->at = w->repeat;
734		1155
735	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
736	}	1157	}
737		1158
738	void	1159	void
739	evtimer_again (struct ev_timer *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
740	{	1161	{
741	if (ev_is_active (w))	1162	if (ev_is_active (w))
742	{	1163	{
743	if (w->repeat)	1164	if (w->repeat)
744	{	1165	{
745	w->at = now + w->repeat;	1166	((WT)w)->at = mn_now + w->repeat;
746	downheap ((WT *)timers, timercnt, w->active - 1);	1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
747	}	1168	}
748	else	1169	else
749	evtimer_stop (w);	1170	ev_timer_stop (EV_A_ w);
750	}	1171	}
751	else if (w->repeat)	1172	else if (w->repeat)
752	evtimer_start (w);	1173	ev_timer_start (EV_A_ w);
753	}	1174	}
754		1175
755	void	1176	void
756	evperiodic_start (struct ev_periodic *w)	1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
757	{	1178	{
758	if (ev_is_active (w))	1179	if (ev_is_active (w))
759	return;	1180	return;
760		1181
761	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.));
762		1183
763	/* 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 */
764	if (w->interval)	1185	if (w->interval)
765	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;
766		1187
767	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
768	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
769	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
770	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
771	}
772		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
773	void	1196	void
774	evperiodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
775	{	1198	{
776	ev_clear ((W)w);	1199	ev_clear_pending (EV_A_ (W)w);
777	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
778	return;	1201	return;
779		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
780	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
781	{	1206	{
782	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
783	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
784	}	1209	}
785		1210
786	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
787	}	1212	}
788		1213
789	void	1214	void
790	evsignal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
791	{	1216	{
792	if (ev_is_active (w))	1217	if (ev_is_active (w))
793	return;	1218	return;
794		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
795	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
796	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
797	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
798		1298
799	if (!w->next)	1299	if (!((WL)w)->next)
800	{	1300	{
801	struct sigaction sa;	1301	struct sigaction sa;
802	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
803	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
804	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
805	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
806	}	1306	}
807	}	1307	}
808		1308
809	void	1309	void
810	evsignal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
811	{	1311	{
812	ev_clear ((W)w);	1312	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
814	return;	1314	return;
815		1315
816	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
817	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
818		1318
819	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
820	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
821	}	1321	}
822		1322
823	void evidle_start (struct ev_idle *w)	1323	void
		1324	ev_child_start (EV_P_ struct ev_child *w)
824	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
825	if (ev_is_active (w))	1329	if (ev_is_active (w))
826	return;	1330	return;
827		1331
828	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
829	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
830	idles [idlecnt - 1] = w;
831	}	1334	}
832		1335
833	void evidle_stop (struct ev_idle *w)	1336	void
		1337	ev_child_stop (EV_P_ struct ev_child *w)
834	{	1338	{
835	ev_clear ((W)w);	1339	ev_clear_pending (EV_A_ (W)w);
836	if (ev_is_active (w))	1340	if (ev_is_active (w))
837	return;	1341	return;
838		1342
839	idles [w->active - 1] = idles [--idlecnt];	1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
840	ev_stop ((W)w);	1344	ev_stop (EV_A_ (W)w);
841	}
842
843	void evprepare_start (struct ev_prepare *w)
844	{
845	if (ev_is_active (w))
846	return;
847
848	ev_start ((W)w, ++preparecnt);
849	array_needsize (prepares, preparemax, preparecnt, );
850	prepares [preparecnt - 1] = w;
851	}
852
853	void evprepare_stop (struct ev_prepare *w)
854	{
855	ev_clear ((W)w);
856	if (ev_is_active (w))
857	return;
858
859	prepares [w->active - 1] = prepares [--preparecnt];
860	ev_stop ((W)w);
861	}
862
863	void evcheck_start (struct ev_check *w)
864	{
865	if (ev_is_active (w))
866	return;
867
868	ev_start ((W)w, ++checkcnt);
869	array_needsize (checks, checkmax, checkcnt, );
870	checks [checkcnt - 1] = w;
871	}
872
873	void evcheck_stop (struct ev_check *w)
874	{
875	ev_clear ((W)w);
876	if (ev_is_active (w))
877	return;
878
879	checks [w->active - 1] = checks [--checkcnt];
880	ev_stop ((W)w);
881	}	1345	}
882		1346
883	/*****************************************************************************/	1347	/*****************************************************************************/
884		1348
885	struct ev_once	1349	struct ev_once
…		…
889	void (cb)(int revents, void arg);	1353	void (cb)(int revents, void arg);
890	void *arg;	1354	void *arg;
891	};	1355	};
892		1356
893	static void	1357	static void
894	once_cb (struct ev_once *once, int revents)	1358	once_cb (EV_P_ struct ev_once *once, int revents)
895	{	1359	{
896	void (cb)(int revents, void arg) = once->cb;	1360	void (cb)(int revents, void arg) = once->cb;
897	void *arg = once->arg;	1361	void *arg = once->arg;
898		1362
899	evio_stop (&once->io);	1363	ev_io_stop (EV_A_ &once->io);
900	evtimer_stop (&once->to);	1364	ev_timer_stop (EV_A_ &once->to);
901	free (once);	1365	free (once);
902		1366
903	cb (revents, arg);	1367	cb (revents, arg);
904	}	1368	}
905		1369
906	static void	1370	static void
907	once_cb_io (struct ev_io *w, int revents)	1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
908	{	1372	{
909	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);
910	}	1374	}
911		1375
912	static void	1376	static void
913	once_cb_to (struct ev_timer *w, int revents)	1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
914	{	1378	{
915	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);
916	}	1380	}
917		1381
918	void	1382	void
919	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)
920	{	1384	{
921	struct ev_once *once = malloc (sizeof (struct ev_once));	1385	struct ev_once *once = malloc (sizeof (struct ev_once));
922		1386
923	if (!once)	1387	if (!once)
924	cb (EV_ERROR, arg);	1388	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
925	else	1389	else
926	{	1390	{
927	once->cb = cb;	1391	once->cb = cb;
928	once->arg = arg;	1392	once->arg = arg;
929		1393
930	evw_init (&once->io, once_cb_io);	1394	ev_watcher_init (&once->io, once_cb_io);
931
932	if (fd >= 0)	1395	if (fd >= 0)
933	{	1396	{
934	evio_set (&once->io, fd, events);	1397	ev_io_set (&once->io, fd, events);
935	evio_start (&once->io);	1398	ev_io_start (EV_A_ &once->io);
936	}	1399	}
937		1400
938	evw_init (&once->to, once_cb_to);	1401	ev_watcher_init (&once->to, once_cb_to);
939
940	if (timeout >= 0.)	1402	if (timeout >= 0.)
941	{	1403	{
942	evtimer_set (&once->to, timeout, 0.);	1404	ev_timer_set (&once->to, timeout, 0.);
943	evtimer_start (&once->to);	1405	ev_timer_start (EV_A_ &once->to);
944	}	1406	}
945	}	1407	}
946	}	1408	}
947		1409
948	/*****************************************************************************/
949
950	#if 0
951
952	struct ev_io wio;
953
954	static void
955	sin_cb (struct ev_io *w, int revents)
956	{
957	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
958	}
959
960	static void
961	ocb (struct ev_timer *w, int revents)
962	{
963	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
964	evtimer_stop (w);
965	evtimer_start (w);
966	}
967
968	static void
969	scb (struct ev_signal *w, int revents)
970	{
971	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
972	evio_stop (&wio);
973	evio_start (&wio);
974	}
975
976	static void
977	gcb (struct ev_signal *w, int revents)
978	{
979	fprintf (stderr, "generic %x\n", revents);
980
981	}
982
983	int main (void)
984	{
985	ev_init (0);
986
987	evio_init (&wio, sin_cb, 0, EV_READ);
988	evio_start (&wio);
989
990	struct ev_timer t[10000];
991
992	#if 0
993	int i;
994	for (i = 0; i < 10000; ++i)
995	{
996	struct ev_timer *w = t + i;
997	evw_init (w, ocb, i);
998	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
999	evtimer_start (w);
1000	if (drand48 () < 0.5)
1001	evtimer_stop (w);
1002	}
1003	#endif
1004
1005	struct ev_timer t1;
1006	evtimer_init (&t1, ocb, 5, 10);
1007	evtimer_start (&t1);
1008
1009	struct ev_signal sig;
1010	evsignal_init (&sig, scb, SIGQUIT);
1011	evsignal_start (&sig);
1012
1013	struct ev_check cw;
1014	evcheck_init (&cw, gcb);
1015	evcheck_start (&cw);
1016
1017	struct ev_idle iw;
1018	evidle_init (&iw, gcb);
1019	evidle_start (&iw);
1020
1021	ev_loop (0);
1022
1023	return 0;
1024	}
1025
1026	#endif
1027
1028
1029
1030

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Comparing libev/ev.c (file contents): Revision 1.20 by root, Wed Oct 31 18:28:00 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 1.20 by root, Wed Oct 31 18:28:00 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC