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Comparing libev/ev.c (file contents):
Revision 1.18 by root, Wed Oct 31 16:29:52 2007 UTC vs.
Revision 1.66 by root, Sun Nov 4 23:30:53 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		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
		237	#define array_free(stem, idx) \
		238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		239
123	/*****************************************************************************/	240	/*****************************************************************************/
124		241
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	242	static void
138	anfds_init (ANFD *base, int count)	243	anfds_init (ANFD *base, int count)
139	{	244	{
140	while (count--)	245	while (count--)
141	{	246	{
142	base->head = 0;	247	base->head = 0;
143	base->wev = base->rev = EV_NONE;	248	base->events = EV_NONE;
		249	base->reify = 0;
		250
144	++base;	251	++base;
145	}	252	}
146	}	253	}
147		254
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	255	static void
158	event (W w, int events)	256	event (EV_P_ W w, int events)
159	{	257	{
160	if (w->active)	258	if (w->pending)
161	{	259	{
162	w->pending = ++pendingcnt;
163	array_needsize (pendings, pendingmax, pendingcnt, );
164	pendings [pendingcnt - 1].w = w;
165	pendings [pendingcnt - 1].events = events;	260	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		261	return;
166	}	262	}
167	}
168		263
		264	w->pending = ++pendingcnt [ABSPRI (w)];
		265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		266	pendings [ABSPRI (w)][w->pending - 1].w = w;
		267	pendings [ABSPRI (w)][w->pending - 1].events = events;
		268	}
		269
169	static void	270	static void
		271	queue_events (EV_P_ W *events, int eventcnt, int type)
		272	{
		273	int i;
		274
		275	for (i = 0; i < eventcnt; ++i)
		276	event (EV_A_ events [i], type);
		277	}
		278
		279	static void
170	fd_event (int fd, int events)	280	fd_event (EV_P_ int fd, int events)
171	{	281	{
172	ANFD *anfd = anfds + fd;	282	ANFD *anfd = anfds + fd;
173	struct ev_io *w;	283	struct ev_io *w;
174		284
175	for (w = anfd->head; w; w = w->next)	285	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
176	{	286	{
177	int ev = w->events & events;	287	int ev = w->events & events;
178		288
179	if (ev)	289	if (ev)
180	event ((W)w, ev);	290	event (EV_A_ (W)w, ev);
181	}	291	}
182	}	292	}
183		293
		294	/*****************************************************************************/
		295
184	static void	296	static void
185	queue_events (W *events, int eventcnt, int type)	297	fd_reify (EV_P)
186	{	298	{
187	int i;	299	int i;
188		300
189	for (i = 0; i < eventcnt; ++i)	301	for (i = 0; i < fdchangecnt; ++i)
190	event (events [i], type);	302	{
		303	int fd = fdchanges [i];
		304	ANFD *anfd = anfds + fd;
		305	struct ev_io *w;
		306
		307	int events = 0;
		308
		309	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		310	events |= w->events;
		311
		312	anfd->reify = 0;
		313
		314	method_modify (EV_A_ fd, anfd->events, events);
		315	anfd->events = events;
		316	}
		317
		318	fdchangecnt = 0;
		319	}
		320
		321	static void
		322	fd_change (EV_P_ int fd)
		323	{
		324	if (anfds [fd].reify || fdchangecnt < 0)
		325	return;
		326
		327	anfds [fd].reify = 1;
		328
		329	++fdchangecnt;
		330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		331	fdchanges [fdchangecnt - 1] = fd;
		332	}
		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		343	}
		344	}
		345
		346	/* called on EBADF to verify fds */
		347	static void
		348	fd_ebadf (EV_P)
		349	{
		350	int fd;
		351
		352	for (fd = 0; fd < anfdmax; ++fd)
		353	if (anfds [fd].events)
		354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		355	fd_kill (EV_A_ fd);
		356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
		366	{
		367	close (fd);
		368	fd_kill (EV_A_ fd);
		369	return;
		370	}
		371	}
		372
		373	/* susually called after fork if method needs to re-arm all fds from scratch */
		374	static void
		375	fd_rearm_all (EV_P)
		376	{
		377	int fd;
		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
191	}	386	}
192		387
193	/*****************************************************************************/	388	/*****************************************************************************/
194		389
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	390	static void
202	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
203	{	392	{
204	WT w = timers [k];	393	WT w = heap [k];
205		394
206	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
207	{	396	{
208	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
209	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
210	k >>= 1;	399	k >>= 1;
211	}	400	}
212		401
213	timers [k] = w;	402	heap [k] = w;
214	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
215		404
216	}	405	}
217		406
218	static void	407	static void
219	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
220	{	409	{
221	WT w = timers [k];	410	WT w = heap [k];
222		411
223	while (k < (N >> 1))	412	while (k < (N >> 1))
224	{	413	{
225	int j = k << 1;	414	int j = k << 1;
226		415
227	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
228	++j;	417	++j;
229		418
230	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
231	break;	420	break;
232		421
233	timers [k] = timers [j];	422	heap [k] = heap [j];
234	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
235	k = j;	424	k = j;
236	}	425	}
237		426
238	timers [k] = w;	427	heap [k] = w;
239	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
240	}	429	}
241		430
242	/*****************************************************************************/	431	/*****************************************************************************/
243		432
244	typedef struct	433	typedef struct
245	{	434	{
246	struct ev_signal *head;	435	struct ev_watcher_list *head;
247	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
248	} ANSIG;	437	} ANSIG;
249		438
250	static ANSIG *signals;	439	static ANSIG *signals;
251	static int signalmax;	440	static int signalmax;
252		441
253	static int sigpipe [2];	442	static int sigpipe [2];
254	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
255	static struct ev_io sigev;	444	static struct ev_io sigev;
256		445
257	static void	446	static void
258	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
259	{	448	{
260	while (count--)	449	while (count--)
261	{	450	{
262	base->head = 0;	451	base->head = 0;
263	base->gotsig = 0;	452	base->gotsig = 0;
		453
264	++base;	454	++base;
265	}	455	}
266	}	456	}
267		457
268	static void	458	static void
…		…
270	{	460	{
271	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
272		462
273	if (!gotsig)	463	if (!gotsig)
274	{	464	{
		465	int old_errno = errno;
275	gotsig = 1;	466	gotsig = 1;
276	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
277	}	469	}
278	}	470	}
279		471
280	static void	472	static void
281	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
282	{	474	{
283	struct ev_signal *w;	475	struct ev_watcher_list *w;
284	int sig;	476	int signum;
285		477
		478	read (sigpipe [0], &revents, 1);
286	gotsig = 0;	479	gotsig = 0;
287	read (sigpipe [0], &revents, 1);
288		480
289	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
290	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
291	{	483	{
292	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
293		485
294	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
295	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
296	}	488	}
297	}	489	}
298		490
299	static void	491	static void
300	siginit (void)	492	siginit (EV_P)
301	{	493	{
		494	#ifndef WIN32
302	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
303	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
304		497
305	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
306	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
307	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
308		502
309	evio_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
310	evio_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
311	}	506	}
312		507
313	/*****************************************************************************/	508	/*****************************************************************************/
314		509
315	static struct ev_idle **idles;	510	#ifndef WIN32
316	static int idlemax, idlecnt;
317		511
318	static struct ev_check **checks;	512	static struct ev_child *childs [PID_HASHSIZE];
319	static int checkmax, checkcnt;	513	static struct ev_signal childev;
		514
		515	#ifndef WCONTINUED
		516	# define WCONTINUED 0
		517	#endif
		518
		519	static void
		520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		521	{
		522	struct ev_child *w;
		523
		524	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		525	if (w->pid == pid || !w->pid)
		526	{
		527	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
		537	int pid, status;
		538
		539	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		540	{
		541	/* make sure we are called again until all childs have been reaped */
		542	event (EV_A_ (W)sw, EV_SIGNAL);
		543
		544	child_reap (EV_A_ sw, pid, pid, status);
		545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
		547	}
		548
		549	#endif
320		550
321	/*****************************************************************************/	551	/*****************************************************************************/
322		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
323	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
324	# include "ev_epoll.c"	557	# include "ev_epoll.c"
325	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
326	#if HAVE_SELECT	562	#if EV_USE_SELECT
327	# include "ev_select.c"	563	# include "ev_select.c"
328	#endif	564	#endif
329		565
330	int ev_init (int flags)	566	int
		567	ev_version_major (void)
331	{	568	{
		569	return EV_VERSION_MAJOR;
		570	}
		571
		572	int
		573	ev_version_minor (void)
		574	{
		575	return EV_VERSION_MINOR;
		576	}
		577
		578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
		581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	|| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
		599	if (!method)
		600	{
332	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
333	{	602	{
334	struct timespec ts;	603	struct timespec ts;
335	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
336	have_monotonic = 1;	605	have_monotonic = 1;
337	}	606	}
338	#endif	607	#endif
339		608
340	ev_now = ev_time ();	609	rt_now = ev_time ();
341	now = get_clock ();	610	mn_now = get_clock ();
342	diff = ev_now - now;	611	now_floor = mn_now;
		612	rtmn_diff = rt_now - mn_now;
343		613
		614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
		618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_EPOLL
		628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		632	#endif
		633	#if EV_USE_SELECT
		634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		635	#endif
		636	}
		637	}
		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	int i;
		643
		644	#if EV_USE_WIN32
		645	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		646	#endif
		647	#if EV_USE_KQUEUE
		648	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		649	#endif
		650	#if EV_USE_EPOLL
		651	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		652	#endif
		653	#if EV_USE_POLL
		654	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		655	#endif
		656	#if EV_USE_SELECT
		657	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		658	#endif
		659
		660	for (i = NUMPRI; i--; )
		661	array_free (pending, [i]);
		662
		663	array_free (fdchange, );
		664	array_free (timer, );
		665	array_free (periodic, );
		666	array_free (idle, );
		667	array_free (prepare, );
		668	array_free (check, );
		669
		670	method = 0;
		671	/*TODO*/
		672	}
		673
		674	void
		675	loop_fork (EV_P)
		676	{
		677	/*TODO*/
		678	#if EV_USE_EPOLL
		679	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		680	#endif
		681	#if EV_USE_KQUEUE
		682	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		683	#endif
		684	}
		685
		686	#if EV_MULTIPLICITY
		687	struct ev_loop *
		688	ev_loop_new (int methods)
		689	{
		690	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		691
		692	loop_init (EV_A_ methods);
		693
		694	if (ev_method (EV_A))
		695	return loop;
		696
		697	return 0;
		698	}
		699
		700	void
		701	ev_loop_destroy (EV_P)
		702	{
		703	loop_destroy (EV_A);
		704	free (loop);
		705	}
		706
		707	void
		708	ev_loop_fork (EV_P)
		709	{
		710	loop_fork (EV_A);
		711	}
		712
		713	#endif
		714
		715	#if EV_MULTIPLICITY
		716	struct ev_loop default_loop_struct;
		717	static struct ev_loop *default_loop;
		718
		719	struct ev_loop *
		720	#else
		721	static int default_loop;
		722
		723	int
		724	#endif
		725	ev_default_loop (int methods)
		726	{
		727	if (sigpipe [0] == sigpipe [1])
344	if (pipe (sigpipe))	728	if (pipe (sigpipe))
345	return 0;	729	return 0;
346		730
347	ev_method = EVMETHOD_NONE;	731	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	{	732	{
		733	#if EV_MULTIPLICITY
		734	struct ev_loop *loop = default_loop = &default_loop_struct;
		735	#else
		736	default_loop = 1;
		737	#endif
		738
		739	loop_init (EV_A_ methods);
		740
		741	if (ev_method (EV_A))
		742	{
357	evw_init (&sigev, sigcb);	743	ev_watcher_init (&sigev, sigcb);
		744	ev_set_priority (&sigev, EV_MAXPRI);
358	siginit ();	745	siginit (EV_A);
359	}
360		746
361	return ev_method;	747	#ifndef WIN32
362	}	748	ev_signal_init (&childev, childcb, SIGCHLD);
363		749	ev_set_priority (&childev, EV_MAXPRI);
364	/*****************************************************************************/	750	ev_signal_start (EV_A_ &childev);
365		751	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	752	#endif
		753	}
		754	else
		755	default_loop = 0;
		756	}
382		757
		758	return default_loop;
		759	}
		760
		761	void
		762	ev_default_destroy (void)
		763	{
		764	#if EV_MULTIPLICITY
		765	struct ev_loop *loop = default_loop;
		766	#endif
		767
		768	ev_ref (EV_A); /* child watcher */
		769	ev_signal_stop (EV_A_ &childev);
		770
		771	ev_ref (EV_A); /* signal watcher */
383	evio_stop (&sigev);	772	ev_io_stop (EV_A_ &sigev);
		773
		774	close (sigpipe [0]); sigpipe [0] = 0;
		775	close (sigpipe [1]); sigpipe [1] = 0;
		776
		777	loop_destroy (EV_A);
		778	}
		779
		780	void
		781	ev_default_fork (void)
		782	{
		783	#if EV_MULTIPLICITY
		784	struct ev_loop *loop = default_loop;
		785	#endif
		786
		787	loop_fork (EV_A);
		788
		789	ev_io_stop (EV_A_ &sigev);
384	close (sigpipe [0]);	790	close (sigpipe [0]);
385	close (sigpipe [1]);	791	close (sigpipe [1]);
386	pipe (sigpipe);	792	pipe (sigpipe);
		793
		794	ev_ref (EV_A); /* signal watcher */
387	siginit ();	795	siginit (EV_A);
388	}	796	}
389		797
390	/*****************************************************************************/	798	/*****************************************************************************/
391		799
392	static void	800	static void
393	fd_reify (void)	801	call_pending (EV_P)
394	{	802	{
395	int i;	803	int pri;
396		804
397	for (i = 0; i < fdchangecnt; ++i)	805	for (pri = NUMPRI; pri--; )
398	{	806	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	{	807	{
410	method_modify (fd, anfd->wev, wev);
411	anfd->wev = wev;
412	}
413	}
414
415	fdchangecnt = 0;
416	}
417
418	static void
419	call_pending ()
420	{
421	while (pendingcnt)
422	{
423	ANPENDING *p = pendings + --pendingcnt;	808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
424		809
425	if (p->w)	810	if (p->w)
426	{	811	{
427	p->w->pending = 0;	812	p->w->pending = 0;
428	p->w->cb (p->w, p->events);	813	p->w->cb (EV_A_ p->w, p->events);
429	}	814	}
430	}	815	}
431	}	816	}
432		817
433	static void	818	static void
434	timers_reify ()	819	timers_reify (EV_P)
435	{	820	{
436	while (timercnt && timers [0]->at <= now)	821	while (timercnt && ((WT)timers [0])->at <= mn_now)
437	{	822	{
438	struct ev_timer *w = timers [0];	823	struct ev_timer *w = timers [0];
439		824
440	event ((W)w, EV_TIMEOUT);	825	assert (("inactive timer on timer heap detected", ev_is_active (w)));
441		826
442	/* first reschedule or stop timer */	827	/* first reschedule or stop timer */
443	if (w->repeat)	828	if (w->repeat)
444	{	829	{
		830	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
445	w->at = now + w->repeat;	831	((WT)w)->at = mn_now + w->repeat;
446	assert (("timer timeout in the past, negative repeat?", w->at > now));
447	downheap ((WT *)timers, timercnt, 0);	832	downheap ((WT *)timers, timercnt, 0);
448	}	833	}
449	else	834	else
450	evtimer_stop (w); /* nonrepeating: stop timer */	835	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
451	}
452	}
453		836
		837	event (EV_A_ (W)w, EV_TIMEOUT);
		838	}
		839	}
		840
454	static void	841	static void
455	periodics_reify ()	842	periodics_reify (EV_P)
456	{	843	{
457	while (periodiccnt && periodics [0]->at <= ev_now)	844	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
458	{	845	{
459	struct ev_periodic *w = periodics [0];	846	struct ev_periodic *w = periodics [0];
		847
		848	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
460		849
461	/* first reschedule or stop timer */	850	/* first reschedule or stop timer */
462	if (w->interval)	851	if (w->interval)
463	{	852	{
464	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	853	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
465	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	854	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
466	downheap ((WT *)periodics, periodiccnt, 0);	855	downheap ((WT *)periodics, periodiccnt, 0);
467	}	856	}
468	else	857	else
469	evperiodic_stop (w); /* nonrepeating: stop timer */	858	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
470		859
471	event ((W)w, EV_TIMEOUT);	860	event (EV_A_ (W)w, EV_PERIODIC);
472	}	861	}
473	}	862	}
474		863
475	static void	864	static void
476	periodics_reschedule (ev_tstamp diff)	865	periodics_reschedule (EV_P)
477	{	866	{
478	int i;	867	int i;
479		868
480	/* adjust periodics after time jump */	869	/* adjust periodics after time jump */
481	for (i = 0; i < periodiccnt; ++i)	870	for (i = 0; i < periodiccnt; ++i)
482	{	871	{
483	struct ev_periodic *w = periodics [i];	872	struct ev_periodic *w = periodics [i];
484		873
485	if (w->interval)	874	if (w->interval)
486	{	875	{
487	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	876	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
488		877
489	if (fabs (diff) >= 1e-4)	878	if (fabs (diff) >= 1e-4)
490	{	879	{
491	evperiodic_stop (w);	880	ev_periodic_stop (EV_A_ w);
492	evperiodic_start (w);	881	ev_periodic_start (EV_A_ w);
493		882
494	i = 0; /* restart loop, inefficient, but time jumps should be rare */	883	i = 0; /* restart loop, inefficient, but time jumps should be rare */
495	}	884	}
496	}	885	}
497	}	886	}
498	}	887	}
499		888
		889	inline int
		890	time_update_monotonic (EV_P)
		891	{
		892	mn_now = get_clock ();
		893
		894	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		895	{
		896	rt_now = rtmn_diff + mn_now;
		897	return 0;
		898	}
		899	else
		900	{
		901	now_floor = mn_now;
		902	rt_now = ev_time ();
		903	return 1;
		904	}
		905	}
		906
500	static void	907	static void
501	time_update ()	908	time_update (EV_P)
502	{	909	{
503	int i;	910	int i;
504		911
505	ev_now = ev_time ();	912	#if EV_USE_MONOTONIC
506
507	if (have_monotonic)	913	if (expect_true (have_monotonic))
508	{	914	{
509	ev_tstamp odiff = diff;	915	if (time_update_monotonic (EV_A))
510
511	for (i = 4; --i; ) /* loop a few times, before making important decisions */
512	{	916	{
513	now = get_clock ();	917	ev_tstamp odiff = rtmn_diff;
		918
		919	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		920	{
514	diff = ev_now - now;	921	rtmn_diff = rt_now - mn_now;
515		922
516	if (fabs (odiff - diff) < MIN_TIMEJUMP)	923	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
517	return; /* all is well */	924	return; /* all is well */
518		925
519	ev_now = ev_time ();	926	rt_now = ev_time ();
		927	mn_now = get_clock ();
		928	now_floor = mn_now;
		929	}
		930
		931	periodics_reschedule (EV_A);
		932	/* no timer adjustment, as the monotonic clock doesn't jump */
		933	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
520	}	934	}
521
522	periodics_reschedule (diff - odiff);
523	/* no timer adjustment, as the monotonic clock doesn't jump */
524	}	935	}
525	else	936	else
		937	#endif
526	{	938	{
527	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	939	rt_now = ev_time ();
		940
		941	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
528	{	942	{
529	periodics_reschedule (ev_now - now);	943	periodics_reschedule (EV_A);
530		944
531	/* adjust timers. this is easy, as the offset is the same for all */	945	/* adjust timers. this is easy, as the offset is the same for all */
532	for (i = 0; i < timercnt; ++i)	946	for (i = 0; i < timercnt; ++i)
533	timers [i]->at += diff;	947	((WT)timers [i])->at += rt_now - mn_now;
534	}	948	}
535		949
536	now = ev_now;	950	mn_now = rt_now;
537	}	951	}
538	}	952	}
539		953
540	int ev_loop_done;	954	void
		955	ev_ref (EV_P)
		956	{
		957	++activecnt;
		958	}
541		959
		960	void
		961	ev_unref (EV_P)
		962	{
		963	--activecnt;
		964	}
		965
		966	static int loop_done;
		967
		968	void
542	void ev_loop (int flags)	969	ev_loop (EV_P_ int flags)
543	{	970	{
544	double block;	971	double block;
545	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	972	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
546
547	if (checkcnt)
548	{
549	queue_events ((W *)checks, checkcnt, EV_CHECK);
550	call_pending ();
551	}
552		973
553	do	974	do
554	{	975	{
		976	/* queue check watchers (and execute them) */
		977	if (expect_false (preparecnt))
		978	{
		979	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		980	call_pending (EV_A);
		981	}
		982
555	/* update fd-related kernel structures */	983	/* update fd-related kernel structures */
556	fd_reify ();	984	fd_reify (EV_A);
557		985
558	/* calculate blocking time */	986	/* calculate blocking time */
559		987
560	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	988	/* we only need this for !monotonic clockor timers, but as we basically
		989	always have timers, we just calculate it always */
		990	#if EV_USE_MONOTONIC
		991	if (expect_true (have_monotonic))
		992	time_update_monotonic (EV_A);
		993	else
		994	#endif
		995	{
561	ev_now = ev_time ();	996	rt_now = ev_time ();
		997	mn_now = rt_now;
		998	}
562		999
563	if (flags & EVLOOP_NONBLOCK || idlecnt)	1000	if (flags & EVLOOP_NONBLOCK || idlecnt)
564	block = 0.;	1001	block = 0.;
565	else	1002	else
566	{	1003	{
567	block = MAX_BLOCKTIME;	1004	block = MAX_BLOCKTIME;
568		1005
569	if (timercnt)	1006	if (timercnt)
570	{	1007	{
571	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1008	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
572	if (block > to) block = to;	1009	if (block > to) block = to;
573	}	1010	}
574		1011
575	if (periodiccnt)	1012	if (periodiccnt)
576	{	1013	{
577	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1014	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
578	if (block > to) block = to;	1015	if (block > to) block = to;
579	}	1016	}
580		1017
581	if (block < 0.) block = 0.;	1018	if (block < 0.) block = 0.;
582	}	1019	}
583		1020
584	method_poll (block);	1021	method_poll (EV_A_ block);
585		1022
586	/* update ev_now, do magic */	1023	/* update rt_now, do magic */
587	time_update ();	1024	time_update (EV_A);
588		1025
589	/* queue pending timers and reschedule them */	1026	/* queue pending timers and reschedule them */
		1027	timers_reify (EV_A); /* relative timers called last */
590	periodics_reify (); /* absolute timers first */	1028	periodics_reify (EV_A); /* absolute timers called first */
591	timers_reify (); /* relative timers second */
592		1029
593	/* queue idle watchers unless io or timers are pending */	1030	/* queue idle watchers unless io or timers are pending */
594	if (!pendingcnt)	1031	if (!pendingcnt)
595	queue_events ((W *)idles, idlecnt, EV_IDLE);	1032	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
596		1033
597	/* queue check and possibly idle watchers */	1034	/* queue check watchers, to be executed first */
		1035	if (checkcnt)
598	queue_events ((W *)checks, checkcnt, EV_CHECK);	1036	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
599		1037
600	call_pending ();	1038	call_pending (EV_A);
601	}	1039	}
602	while (!ev_loop_done);	1040	while (activecnt && !loop_done);
603		1041
604	if (ev_loop_done != 2)	1042	if (loop_done != 2)
605	ev_loop_done = 0;	1043	loop_done = 0;
		1044	}
		1045
		1046	void
		1047	ev_unloop (EV_P_ int how)
		1048	{
		1049	loop_done = how;
606	}	1050	}
607		1051
608	/*****************************************************************************/	1052	/*****************************************************************************/
609		1053
610	static void	1054	inline void
611	wlist_add (WL *head, WL elem)	1055	wlist_add (WL *head, WL elem)
612	{	1056	{
613	elem->next = *head;	1057	elem->next = *head;
614	*head = elem;	1058	*head = elem;
615	}	1059	}
616		1060
617	static void	1061	inline void
618	wlist_del (WL *head, WL elem)	1062	wlist_del (WL *head, WL elem)
619	{	1063	{
620	while (*head)	1064	while (*head)
621	{	1065	{
622	if (*head == elem)	1066	if (*head == elem)
…		…
627		1071
628	head = &(*head)->next;	1072	head = &(*head)->next;
629	}	1073	}
630	}	1074	}
631		1075
632	static void	1076	inline void
633	ev_clear (W w)	1077	ev_clear_pending (EV_P_ W w)
634	{	1078	{
635	if (w->pending)	1079	if (w->pending)
636	{	1080	{
637	pendings [w->pending - 1].w = 0;	1081	pendings [ABSPRI (w)][w->pending - 1].w = 0;
638	w->pending = 0;	1082	w->pending = 0;
639	}	1083	}
640	}	1084	}
641		1085
642	static void	1086	inline void
643	ev_start (W w, int active)	1087	ev_start (EV_P_ W w, int active)
644	{	1088	{
		1089	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1090	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1091
645	w->active = active;	1092	w->active = active;
		1093	ev_ref (EV_A);
646	}	1094	}
647		1095
648	static void	1096	inline void
649	ev_stop (W w)	1097	ev_stop (EV_P_ W w)
650	{	1098	{
		1099	ev_unref (EV_A);
651	w->active = 0;	1100	w->active = 0;
652	}	1101	}
653		1102
654	/*****************************************************************************/	1103	/*****************************************************************************/
655		1104
656	void	1105	void
657	evio_start (struct ev_io *w)	1106	ev_io_start (EV_P_ struct ev_io *w)
658	{	1107	{
		1108	int fd = w->fd;
		1109
659	if (ev_is_active (w))	1110	if (ev_is_active (w))
660	return;	1111	return;
661		1112
662	int fd = w->fd;	1113	assert (("ev_io_start called with negative fd", fd >= 0));
663		1114
664	ev_start ((W)w, 1);	1115	ev_start (EV_A_ (W)w, 1);
665	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1116	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
666	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1117	wlist_add ((WL *)&anfds[fd].head, (WL)w);
667		1118
668	++fdchangecnt;	1119	fd_change (EV_A_ fd);
669	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
670	fdchanges [fdchangecnt - 1] = fd;
671	}	1120	}
672		1121
673	void	1122	void
674	evio_stop (struct ev_io *w)	1123	ev_io_stop (EV_P_ struct ev_io *w)
675	{	1124	{
676	ev_clear ((W)w);	1125	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1126	if (!ev_is_active (w))
678	return;	1127	return;
679		1128
680	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1129	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
681	ev_stop ((W)w);	1130	ev_stop (EV_A_ (W)w);
682		1131
683	++fdchangecnt;	1132	fd_change (EV_A_ w->fd);
684	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
685	fdchanges [fdchangecnt - 1] = w->fd;
686	}	1133	}
687		1134
688	void	1135	void
689	evtimer_start (struct ev_timer *w)	1136	ev_timer_start (EV_P_ struct ev_timer *w)
690	{	1137	{
691	if (ev_is_active (w))	1138	if (ev_is_active (w))
692	return;	1139	return;
693		1140
694	w->at += now;	1141	((WT)w)->at += mn_now;
695		1142
696	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1143	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
697		1144
698	ev_start ((W)w, ++timercnt);	1145	ev_start (EV_A_ (W)w, ++timercnt);
699	array_needsize (timers, timermax, timercnt, );	1146	array_needsize (timers, timermax, timercnt, );
700	timers [timercnt - 1] = w;	1147	timers [timercnt - 1] = w;
701	upheap ((WT *)timers, timercnt - 1);	1148	upheap ((WT *)timers, timercnt - 1);
702	}
703		1149
		1150	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1151	}
		1152
704	void	1153	void
705	evtimer_stop (struct ev_timer *w)	1154	ev_timer_stop (EV_P_ struct ev_timer *w)
706	{	1155	{
707	ev_clear ((W)w);	1156	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1157	if (!ev_is_active (w))
709	return;	1158	return;
710		1159
		1160	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1161
711	if (w->active < timercnt--)	1162	if (((W)w)->active < timercnt--)
712	{	1163	{
713	timers [w->active - 1] = timers [timercnt];	1164	timers [((W)w)->active - 1] = timers [timercnt];
714	downheap ((WT *)timers, timercnt, w->active - 1);	1165	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
715	}	1166	}
716		1167
717	w->at = w->repeat;	1168	((WT)w)->at = w->repeat;
718		1169
719	ev_stop ((W)w);	1170	ev_stop (EV_A_ (W)w);
720	}	1171	}
721		1172
722	void	1173	void
723	evtimer_again (struct ev_timer *w)	1174	ev_timer_again (EV_P_ struct ev_timer *w)
724	{	1175	{
725	if (ev_is_active (w))	1176	if (ev_is_active (w))
726	{	1177	{
727	if (w->repeat)	1178	if (w->repeat)
728	{	1179	{
729	w->at = now + w->repeat;	1180	((WT)w)->at = mn_now + w->repeat;
730	downheap ((WT *)timers, timercnt, w->active - 1);	1181	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
731	}	1182	}
732	else	1183	else
733	evtimer_stop (w);	1184	ev_timer_stop (EV_A_ w);
734	}	1185	}
735	else if (w->repeat)	1186	else if (w->repeat)
736	evtimer_start (w);	1187	ev_timer_start (EV_A_ w);
737	}	1188	}
738		1189
739	void	1190	void
740	evperiodic_start (struct ev_periodic *w)	1191	ev_periodic_start (EV_P_ struct ev_periodic *w)
741	{	1192	{
742	if (ev_is_active (w))	1193	if (ev_is_active (w))
743	return;	1194	return;
744		1195
745	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1196	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
746		1197
747	/* this formula differs from the one in periodic_reify because we do not always round up */	1198	/* this formula differs from the one in periodic_reify because we do not always round up */
748	if (w->interval)	1199	if (w->interval)
749	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1200	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
750		1201
751	ev_start ((W)w, ++periodiccnt);	1202	ev_start (EV_A_ (W)w, ++periodiccnt);
752	array_needsize (periodics, periodicmax, periodiccnt, );	1203	array_needsize (periodics, periodicmax, periodiccnt, );
753	periodics [periodiccnt - 1] = w;	1204	periodics [periodiccnt - 1] = w;
754	upheap ((WT *)periodics, periodiccnt - 1);	1205	upheap ((WT *)periodics, periodiccnt - 1);
755	}
756		1206
		1207	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1208	}
		1209
757	void	1210	void
758	evperiodic_stop (struct ev_periodic *w)	1211	ev_periodic_stop (EV_P_ struct ev_periodic *w)
759	{	1212	{
760	ev_clear ((W)w);	1213	ev_clear_pending (EV_A_ (W)w);
761	if (!ev_is_active (w))	1214	if (!ev_is_active (w))
762	return;	1215	return;
763		1216
		1217	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1218
764	if (w->active < periodiccnt--)	1219	if (((W)w)->active < periodiccnt--)
765	{	1220	{
766	periodics [w->active - 1] = periodics [periodiccnt];	1221	periodics [((W)w)->active - 1] = periodics [periodiccnt];
767	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1222	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
768	}	1223	}
769		1224
770	ev_stop ((W)w);	1225	ev_stop (EV_A_ (W)w);
771	}	1226	}
772		1227
773	void	1228	void
774	evsignal_start (struct ev_signal *w)	1229	ev_idle_start (EV_P_ struct ev_idle *w)
775	{	1230	{
776	if (ev_is_active (w))	1231	if (ev_is_active (w))
777	return;	1232	return;
778		1233
		1234	ev_start (EV_A_ (W)w, ++idlecnt);
		1235	array_needsize (idles, idlemax, idlecnt, );
		1236	idles [idlecnt - 1] = w;
		1237	}
		1238
		1239	void
		1240	ev_idle_stop (EV_P_ struct ev_idle *w)
		1241	{
		1242	ev_clear_pending (EV_A_ (W)w);
		1243	if (ev_is_active (w))
		1244	return;
		1245
		1246	idles [((W)w)->active - 1] = idles [--idlecnt];
		1247	ev_stop (EV_A_ (W)w);
		1248	}
		1249
		1250	void
		1251	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1252	{
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	ev_start (EV_A_ (W)w, ++preparecnt);
		1257	array_needsize (prepares, preparemax, preparecnt, );
		1258	prepares [preparecnt - 1] = w;
		1259	}
		1260
		1261	void
		1262	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1263	{
		1264	ev_clear_pending (EV_A_ (W)w);
		1265	if (ev_is_active (w))
		1266	return;
		1267
		1268	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1269	ev_stop (EV_A_ (W)w);
		1270	}
		1271
		1272	void
		1273	ev_check_start (EV_P_ struct ev_check *w)
		1274	{
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	ev_start (EV_A_ (W)w, ++checkcnt);
		1279	array_needsize (checks, checkmax, checkcnt, );
		1280	checks [checkcnt - 1] = w;
		1281	}
		1282
		1283	void
		1284	ev_check_stop (EV_P_ struct ev_check *w)
		1285	{
		1286	ev_clear_pending (EV_A_ (W)w);
		1287	if (ev_is_active (w))
		1288	return;
		1289
		1290	checks [((W)w)->active - 1] = checks [--checkcnt];
		1291	ev_stop (EV_A_ (W)w);
		1292	}
		1293
		1294	#ifndef SA_RESTART
		1295	# define SA_RESTART 0
		1296	#endif
		1297
		1298	void
		1299	ev_signal_start (EV_P_ struct ev_signal *w)
		1300	{
		1301	#if EV_MULTIPLICITY
		1302	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1303	#endif
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1308
779	ev_start ((W)w, 1);	1309	ev_start (EV_A_ (W)w, 1);
780	array_needsize (signals, signalmax, w->signum, signals_init);	1310	array_needsize (signals, signalmax, w->signum, signals_init);
781	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1311	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
782		1312
783	if (!w->next)	1313	if (!((WL)w)->next)
784	{	1314	{
785	struct sigaction sa;	1315	struct sigaction sa;
786	sa.sa_handler = sighandler;	1316	sa.sa_handler = sighandler;
787	sigfillset (&sa.sa_mask);	1317	sigfillset (&sa.sa_mask);
788	sa.sa_flags = 0;	1318	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
789	sigaction (w->signum, &sa, 0);	1319	sigaction (w->signum, &sa, 0);
790	}	1320	}
791	}	1321	}
792		1322
793	void	1323	void
794	evsignal_stop (struct ev_signal *w)	1324	ev_signal_stop (EV_P_ struct ev_signal *w)
795	{	1325	{
796	ev_clear ((W)w);	1326	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1327	if (!ev_is_active (w))
798	return;	1328	return;
799		1329
800	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1330	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
801	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
802		1332
803	if (!signals [w->signum - 1].head)	1333	if (!signals [w->signum - 1].head)
804	signal (w->signum, SIG_DFL);	1334	signal (w->signum, SIG_DFL);
805	}	1335	}
806		1336
807	void evidle_start (struct ev_idle *w)	1337	void
		1338	ev_child_start (EV_P_ struct ev_child *w)
808	{	1339	{
		1340	#if EV_MULTIPLICITY
		1341	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1342	#endif
809	if (ev_is_active (w))	1343	if (ev_is_active (w))
810	return;	1344	return;
811		1345
812	ev_start ((W)w, ++idlecnt);	1346	ev_start (EV_A_ (W)w, 1);
813	array_needsize (idles, idlemax, idlecnt, );	1347	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
814	idles [idlecnt - 1] = w;
815	}	1348	}
816		1349
817	void evidle_stop (struct ev_idle *w)	1350	void
		1351	ev_child_stop (EV_P_ struct ev_child *w)
818	{	1352	{
819	ev_clear ((W)w);	1353	ev_clear_pending (EV_A_ (W)w);
820	if (ev_is_active (w))	1354	if (ev_is_active (w))
821	return;	1355	return;
822		1356
823	idles [w->active - 1] = idles [--idlecnt];	1357	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
824	ev_stop ((W)w);	1358	ev_stop (EV_A_ (W)w);
825	}
826
827	void evcheck_start (struct ev_check *w)
828	{
829	if (ev_is_active (w))
830	return;
831
832	ev_start ((W)w, ++checkcnt);
833	array_needsize (checks, checkmax, checkcnt, );
834	checks [checkcnt - 1] = w;
835	}
836
837	void evcheck_stop (struct ev_check *w)
838	{
839	ev_clear ((W)w);
840	if (ev_is_active (w))
841	return;
842
843	checks [w->active - 1] = checks [--checkcnt];
844	ev_stop ((W)w);
845	}	1359	}
846		1360
847	/*****************************************************************************/	1361	/*****************************************************************************/
848		1362
849	struct ev_once	1363	struct ev_once
…		…
853	void (*cb)(int revents, void *arg);	1367	void (*cb)(int revents, void *arg);
854	void *arg;	1368	void *arg;
855	};	1369	};
856		1370
857	static void	1371	static void
858	once_cb (struct ev_once *once, int revents)	1372	once_cb (EV_P_ struct ev_once *once, int revents)
859	{	1373	{
860	void (*cb)(int revents, void *arg) = once->cb;	1374	void (*cb)(int revents, void *arg) = once->cb;
861	void *arg = once->arg;	1375	void *arg = once->arg;
862		1376
863	evio_stop (&once->io);	1377	ev_io_stop (EV_A_ &once->io);
864	evtimer_stop (&once->to);	1378	ev_timer_stop (EV_A_ &once->to);
865	free (once);	1379	free (once);
866		1380
867	cb (revents, arg);	1381	cb (revents, arg);
868	}	1382	}
869		1383
870	static void	1384	static void
871	once_cb_io (struct ev_io *w, int revents)	1385	once_cb_io (EV_P_ struct ev_io *w, int revents)
872	{	1386	{
873	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1387	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
874	}	1388	}
875		1389
876	static void	1390	static void
877	once_cb_to (struct ev_timer *w, int revents)	1391	once_cb_to (EV_P_ struct ev_timer *w, int revents)
878	{	1392	{
879	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1393	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
880	}	1394	}
881		1395
882	void	1396	void
883	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1397	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
884	{	1398	{
885	struct ev_once *once = malloc (sizeof (struct ev_once));	1399	struct ev_once *once = malloc (sizeof (struct ev_once));
886		1400
887	if (!once)	1401	if (!once)
888	cb (EV_ERROR, arg);	1402	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
889	else	1403	else
890	{	1404	{
891	once->cb = cb;	1405	once->cb = cb;
892	once->arg = arg;	1406	once->arg = arg;
893		1407
894	evw_init (&once->io, once_cb_io);	1408	ev_watcher_init (&once->io, once_cb_io);
895
896	if (fd >= 0)	1409	if (fd >= 0)
897	{	1410	{
898	evio_set (&once->io, fd, events);	1411	ev_io_set (&once->io, fd, events);
899	evio_start (&once->io);	1412	ev_io_start (EV_A_ &once->io);
900	}	1413	}
901		1414
902	evw_init (&once->to, once_cb_to);	1415	ev_watcher_init (&once->to, once_cb_to);
903
904	if (timeout >= 0.)	1416	if (timeout >= 0.)
905	{	1417	{
906	evtimer_set (&once->to, timeout, 0.);	1418	ev_timer_set (&once->to, timeout, 0.);
907	evtimer_start (&once->to);	1419	ev_timer_start (EV_A_ &once->to);
908	}	1420	}
909	}	1421	}
910	}	1422	}
911		1423
912	/*****************************************************************************/
913
914	#if 0
915
916	struct ev_io wio;
917
918	static void
919	sin_cb (struct ev_io *w, int revents)
920	{
921	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
922	}
923
924	static void
925	ocb (struct ev_timer *w, int revents)
926	{
927	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
928	evtimer_stop (w);
929	evtimer_start (w);
930	}
931
932	static void
933	scb (struct ev_signal *w, int revents)
934	{
935	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
936	evio_stop (&wio);
937	evio_start (&wio);
938	}
939
940	static void
941	gcb (struct ev_signal *w, int revents)
942	{
943	fprintf (stderr, "generic %x\n", revents);
944
945	}
946
947	int main (void)
948	{
949	ev_init (0);
950
951	evio_init (&wio, sin_cb, 0, EV_READ);
952	evio_start (&wio);
953
954	struct ev_timer t[10000];
955
956	#if 0
957	int i;
958	for (i = 0; i < 10000; ++i)
959	{
960	struct ev_timer *w = t + i;
961	evw_init (w, ocb, i);
962	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
963	evtimer_start (w);
964	if (drand48 () < 0.5)
965	evtimer_stop (w);
966	}
967	#endif
968
969	struct ev_timer t1;
970	evtimer_init (&t1, ocb, 5, 10);
971	evtimer_start (&t1);
972
973	struct ev_signal sig;
974	evsignal_init (&sig, scb, SIGQUIT);
975	evsignal_start (&sig);
976
977	struct ev_check cw;
978	evcheck_init (&cw, gcb);
979	evcheck_start (&cw);
980
981	struct ev_idle iw;
982	evidle_init (&iw, gcb);
983	evidle_start (&iw);
984
985	ev_loop (0);
986
987	return 0;
988	}
989
990	#endif
991
992
993
994

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