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

Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		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
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
3	#include <unistd.h>	59	#include <unistd.h>
4	#include <fcntl.h>	60	#include <fcntl.h>
5	#include <signal.h>	61	#include <signal.h>
		62	#include <stddef.h>
6		63
7	#include <stdio.h>	64	#include <stdio.h>
8		65
9	#include <assert.h>	66	#include <assert.h>
10	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
11	#include <sys/time.h>	72	#include <sys/time.h>
12	#include <time.h>	73	#include <time.h>
13		74
14	#define HAVE_EPOLL 1	75	/**/
15		76
16	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
17	# ifdef CLOCK_MONOTONIC
18	# 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
19	# endif	102	# endif
20	#endif	103	#endif
21		104
22	#ifndef HAVE_SELECT
23	# define HAVE_SELECT 1
24	#endif
25
26	#ifndef HAVE_EPOLL
27	# define HAVE_EPOLL 0
28	#endif
29
30	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
32	#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	/**/
33		122
34	#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) */
35	#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 */
36		127
37	#include "ev.h"	128	#include "ev.h"
38		129
39	struct ev_watcher {	130	#if __GNUC__ >= 3
40	EV_WATCHER (ev_watcher);	131	# define expect(expr,value) __builtin_expect ((expr),(value))
41	};	132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
42		137
43	struct ev_watcher_list {	138	#define expect_false(expr) expect ((expr) != 0, 0)
44	EV_WATCHER_LIST (ev_watcher_list);	139	#define expect_true(expr) expect ((expr) != 0, 1)
45	};
46		140
47	struct ev_watcher_time {	141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48	EV_WATCHER_TIME (ev_watcher_time);	142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49	};
50		143
51	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
52	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
53	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
54		147
55	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
56	ev_tstamp ev_now;
57	int ev_method;
58
59	static int have_monotonic; /* runtime */
60
61	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
62	static void (*method_modify)(int fd, int oev, int nev);
63	static void (*method_poll)(ev_tstamp timeout);
64		149
65	/*****************************************************************************/	150	/*****************************************************************************/
66		151
67	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
68	ev_time (void)	186	ev_time (void)
69	{	187	{
70	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
71	struct timespec ts;	189	struct timespec ts;
72	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
73	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
74	#else	192	#else
75	struct timeval tv;	193	struct timeval tv;
76	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
77	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
78	#endif	196	#endif
79	}	197	}
80		198
81	static ev_tstamp	199	inline ev_tstamp
82	get_clock (void)	200	get_clock (void)
83	{	201	{
84	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
85	if (have_monotonic)	203	if (expect_true (have_monotonic))
86	{	204	{
87	struct timespec ts;	205	struct timespec ts;
88	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	}	208	}
91	#endif	209	#endif
92		210
93	return ev_time ();	211	return ev_time ();
94	}	212	}
95		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
96	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
97	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
98	{ \	224	{ \
99	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
100	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	226	do \
		227	{ \
		228	newcnt = array_roundsize (base, newcnt << 1); \
		229	} \
		230	while ((cnt) > newcnt); \
		231	\
101	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
102	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
103	cur = newcnt; \	234	cur = newcnt; \
104	}	235	}
105		236
106	/*****************************************************************************/	237	/*****************************************************************************/
107		238
108	typedef struct
109	{
110	struct ev_io *head;
111	unsigned char wev, rev; /* want, received event set */
112	} ANFD;
113
114	static ANFD *anfds;
115	static int anfdmax;
116
117	static int *fdchanges;
118	static int fdchangemax, fdchangecnt;
119
120	static void	239	static void
121	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
122	{	241	{
123	while (count--)	242	while (count--)
124	{	243	{
125	base->head = 0;	244	base->head = 0;
126	base->wev = base->rev = EV_NONE;	245	base->events = EV_NONE;
		246	base->reify = 0;
		247
127	++base;	248	++base;
128	}	249	}
129	}	250	}
130		251
131	typedef struct
132	{
133	W w;
134	int events;
135	} ANPENDING;
136
137	static ANPENDING *pendings;
138	static int pendingmax, pendingcnt;
139
140	static void	252	static void
141	event (W w, int events)	253	event (EV_P_ W w, int events)
142	{	254	{
		255	if (w->pending)
		256	{
		257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		258	return;
		259	}
		260
143	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
144	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
145	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
146	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
147	}	265	}
148		266
149	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
150	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
151	{	278	{
152	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
153	struct ev_io *w;	280	struct ev_io *w;
154		281
155	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
156	{	283	{
157	int ev = w->events & events;	284	int ev = w->events & events;
158		285
159	if (ev)	286	if (ev)
160	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
161	}	288	}
162	}	289	}
163		290
		291	/*****************************************************************************/
		292
164	static void	293	static void
165	queue_events (W *events, int eventcnt, int type)	294	fd_reify (EV_P)
166	{	295	{
167	int i;	296	int i;
168		297
169	for (i = 0; i < eventcnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
170	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	if (anfd->events != events)
		312	{
		313	method_modify (EV_A_ fd, anfd->events, events);
		314	anfd->events = events;
		315	}
		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	}
171	}	386	}
172		387
173	/*****************************************************************************/	388	/*****************************************************************************/
174		389
175	static struct ev_timer **timers;
176	static int timermax, timercnt;
177
178	static struct ev_periodic **periodics;
179	static int periodicmax, periodiccnt;
180
181	static void	390	static void
182	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
183	{	392	{
184	WT w = timers [k];	393	WT w = heap [k];
185		394
186	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
187	{	396	{
188	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
189	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
190	k >>= 1;	399	k >>= 1;
191	}	400	}
192		401
193	timers [k] = w;	402	heap [k] = w;
194	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
195		404
196	}	405	}
197		406
198	static void	407	static void
199	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
200	{	409	{
201	WT w = timers [k];	410	WT w = heap [k];
202		411
203	while (k < (N >> 1))	412	while (k < (N >> 1))
204	{	413	{
205	int j = k << 1;	414	int j = k << 1;
206		415
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208	++j;	417	++j;
209		418
210	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
211	break;	420	break;
212		421
213	timers [k] = timers [j];	422	heap [k] = heap [j];
214	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
215	k = j;	424	k = j;
216	}	425	}
217		426
218	timers [k] = w;	427	heap [k] = w;
219	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
220	}	429	}
221		430
222	/*****************************************************************************/	431	/*****************************************************************************/
223		432
224	typedef struct	433	typedef struct
225	{	434	{
226	struct ev_signal *head;	435	struct ev_watcher_list *head;
227	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
228	} ANSIG;	437	} ANSIG;
229		438
230	static ANSIG *signals;	439	static ANSIG *signals;
231	static int signalmax;	440	static int signalmax;
232		441
233	static int sigpipe [2];	442	static int sigpipe [2];
234	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
235	static struct ev_io sigev;	444	static struct ev_io sigev;
236		445
237	static void	446	static void
238	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
239	{	448	{
240	while (count--)	449	while (count--)
241	{	450	{
242	base->head = 0;	451	base->head = 0;
243	base->gotsig = 0;	452	base->gotsig = 0;
		453
244	++base;	454	++base;
245	}	455	}
246	}	456	}
247		457
248	static void	458	static void
250	{	460	{
251	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
252		462
253	if (!gotsig)	463	if (!gotsig)
254	{	464	{
		465	int old_errno = errno;
255	gotsig = 1;	466	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
257	}	469	}
258	}	470	}
259		471
260	static void	472	static void
261	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	474	{
263	struct ev_signal *w;	475	struct ev_watcher_list *w;
264	int sig;	476	int signum;
265		477
		478	read (sigpipe [0], &revents, 1);
266	gotsig = 0;	479	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		480
269	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
271	{	483	{
272	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
273		485
274	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
276	}	488	}
277	}	489	}
278		490
279	static void	491	static void
280	siginit (void)	492	siginit (EV_P)
281	{	493	{
		494	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		497
285	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
288		502
289	evio_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	506	}
292		507
293	/*****************************************************************************/	508	/*****************************************************************************/
294		509
295	static struct ev_idle **idles;	510	#ifndef WIN32
296	static int idlemax, idlecnt;
297		511
298	static struct ev_check **checks;	512	static struct ev_child *childs [PID_HASHSIZE];
299	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	w->priority = sw->priority; /* 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
300		550
301	/*****************************************************************************/	551	/*****************************************************************************/
302		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
303	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	557	# include "ev_epoll.c"
305	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
306	#if HAVE_SELECT	562	#if EV_USE_SELECT
307	# include "ev_select.c"	563	# include "ev_select.c"
308	#endif	564	#endif
309		565
310	int ev_init (int flags)	566	int
		567	ev_version_major (void)
311	{	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	{
312	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
313	{	602	{
314	struct timespec ts;	603	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	605	have_monotonic = 1;
317	}	606	}
318	#endif	607	#endif
319		608
320	ev_now = ev_time ();	609	rt_now = ev_time ();
321	now = get_clock ();	610	mn_now = get_clock ();
322	diff = ev_now - now;	611	now_floor = mn_now;
		612	rtmn_diff = rt_now - mn_now;
323		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	#if EV_USE_WIN32
		643	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		644	#endif
		645	#if EV_USE_KQUEUE
		646	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		647	#endif
		648	#if EV_USE_EPOLL
		649	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_POLL
		652	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		653	#endif
		654	#if EV_USE_SELECT
		655	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		656	#endif
		657
		658	method = 0;
		659	/TODO/
		660	}
		661
		662	void
		663	loop_fork (EV_P)
		664	{
		665	/TODO/
		666	#if EV_USE_EPOLL
		667	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		668	#endif
		669	#if EV_USE_KQUEUE
		670	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		671	#endif
		672	}
		673
		674	#if EV_MULTIPLICITY
		675	struct ev_loop *
		676	ev_loop_new (int methods)
		677	{
		678	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		679
		680	loop_init (EV_A_ methods);
		681
		682	if (ev_method (EV_A))
		683	return loop;
		684
		685	return 0;
		686	}
		687
		688	void
		689	ev_loop_destroy (EV_P)
		690	{
		691	loop_destroy (EV_A);
		692	free (loop);
		693	}
		694
		695	void
		696	ev_loop_fork (EV_P)
		697	{
		698	loop_fork (EV_A);
		699	}
		700
		701	#endif
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop default_loop_struct;
		705	static struct ev_loop *default_loop;
		706
		707	struct ev_loop *
		708	#else
		709	static int default_loop;
		710
		711	int
		712	#endif
		713	ev_default_loop (int methods)
		714	{
		715	if (sigpipe [0] == sigpipe [1])
324	if (pipe (sigpipe))	716	if (pipe (sigpipe))
325	return 0;	717	return 0;
326		718
327	ev_method = EVMETHOD_NONE;	719	if (!default_loop)
328	#if HAVE_EPOLL
329	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
330	#endif
331	#if HAVE_SELECT
332	if (ev_method == EVMETHOD_NONE) select_init (flags);
333	#endif
334
335	if (ev_method)
336	{	720	{
		721	#if EV_MULTIPLICITY
		722	struct ev_loop *loop = default_loop = &default_loop_struct;
		723	#else
		724	default_loop = 1;
		725	#endif
		726
		727	loop_init (EV_A_ methods);
		728
		729	if (ev_method (EV_A))
		730	{
337	evw_init (&sigev, sigcb);	731	ev_watcher_init (&sigev, sigcb);
		732	ev_set_priority (&sigev, EV_MAXPRI);
338	siginit ();	733	siginit (EV_A);
339	}
340		734
341	return ev_method;	735	#ifndef WIN32
342	}	736	ev_signal_init (&childev, childcb, SIGCHLD);
343		737	ev_set_priority (&childev, EV_MAXPRI);
344	/*****************************************************************************/	738	ev_signal_start (EV_A_ &childev);
345		739	ev_unref (EV_A); /* child watcher should not keep loop alive */
346	void ev_prefork (void)
347	{
348	/* nop */
349	}
350
351	void ev_postfork_parent (void)
352	{
353	/* nop */
354	}
355
356	void ev_postfork_child (void)
357	{
358	#if HAVE_EPOLL
359	if (ev_method == EVMETHOD_EPOLL)
360	epoll_postfork_child ();
361	#endif	740	#endif
		741	}
		742	else
		743	default_loop = 0;
		744	}
362		745
		746	return default_loop;
		747	}
		748
		749	void
		750	ev_default_destroy (void)
		751	{
		752	#if EV_MULTIPLICITY
		753	struct ev_loop *loop = default_loop;
		754	#endif
		755
		756	ev_ref (EV_A); /* child watcher */
		757	ev_signal_stop (EV_A_ &childev);
		758
		759	ev_ref (EV_A); /* signal watcher */
363	evio_stop (&sigev);	760	ev_io_stop (EV_A_ &sigev);
		761
		762	close (sigpipe [0]); sigpipe [0] = 0;
		763	close (sigpipe [1]); sigpipe [1] = 0;
		764
		765	loop_destroy (EV_A);
		766	}
		767
		768	void
		769	ev_default_fork (void)
		770	{
		771	#if EV_MULTIPLICITY
		772	struct ev_loop *loop = default_loop;
		773	#endif
		774
		775	loop_fork (EV_A);
		776
		777	ev_io_stop (EV_A_ &sigev);
364	close (sigpipe [0]);	778	close (sigpipe [0]);
365	close (sigpipe [1]);	779	close (sigpipe [1]);
366	pipe (sigpipe);	780	pipe (sigpipe);
		781
		782	ev_ref (EV_A); /* signal watcher */
367	siginit ();	783	siginit (EV_A);
368	}	784	}
369		785
370	/*****************************************************************************/	786	/*****************************************************************************/
371		787
372	static void	788	static void
373	fd_reify (void)	789	call_pending (EV_P)
374	{	790	{
375	int i;	791	int pri;
376		792
377	for (i = 0; i < fdchangecnt; ++i)	793	for (pri = NUMPRI; pri--; )
378	{	794	while (pendingcnt [pri])
379	int fd = fdchanges [i];
380	ANFD *anfd = anfds + fd;
381	struct ev_io *w;
382
383	int wev = 0;
384
385	for (w = anfd->head; w; w = w->next)
386	wev \|= w->events;
387
388	if (anfd->wev != wev)
389	{	795	{
390	method_modify (fd, anfd->wev, wev);	796	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391	anfd->wev = wev;
392	}
393	}
394		797
395	fdchangecnt = 0;
396	}
397
398	static void
399	call_pending ()
400	{
401	int i;
402
403	for (i = 0; i < pendingcnt; ++i)
404	{
405	ANPENDING *p = pendings + i;
406
407	if (p->w)	798	if (p->w)
408	{	799	{
409	p->w->pending = 0;	800	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	801	p->w->cb (EV_A_ p->w, p->events);
411	}	802	}
412	}	803	}
413
414	pendingcnt = 0;
415	}	804	}
416		805
417	static void	806	static void
418	timers_reify ()	807	timers_reify (EV_P)
419	{	808	{
420	while (timercnt && timers [0]->at <= now)	809	while (timercnt && timers [0]->at <= mn_now)
421	{	810	{
422	struct ev_timer *w = timers [0];	811	struct ev_timer *w = timers [0];
		812
		813	assert (("inactive timer on timer heap detected", ev_is_active (w)));
423		814
424	/* first reschedule or stop timer */	815	/* first reschedule or stop timer */
425	if (w->repeat)	816	if (w->repeat)
426	{	817	{
		818	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	819	w->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	820	downheap ((WT *)timers, timercnt, 0);
430	}	821	}
431	else	822	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	823	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		824
434	event ((W)w, EV_TIMEOUT);	825	event (EV_A_ (W)w, EV_TIMEOUT);
435	}	826	}
436	}	827	}
437		828
438	static void	829	static void
439	periodics_reify ()	830	periodics_reify (EV_P)
440	{	831	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	832	while (periodiccnt && periodics [0]->at <= rt_now)
442	{	833	{
443	struct ev_periodic *w = periodics [0];	834	struct ev_periodic *w = periodics [0];
		835
		836	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
444		837
445	/* first reschedule or stop timer */	838	/* first reschedule or stop timer */
446	if (w->interval)	839	if (w->interval)
447	{	840	{
448	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	841	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
449	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	842	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
450	downheap ((WT *)periodics, periodiccnt, 0);	843	downheap ((WT *)periodics, periodiccnt, 0);
451	}	844	}
452	else	845	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	846	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		847
455	event ((W)w, EV_TIMEOUT);	848	event (EV_A_ (W)w, EV_PERIODIC);
456	}	849	}
457	}	850	}
458		851
459	static void	852	static void
460	time_jump (ev_tstamp diff)	853	periodics_reschedule (EV_P)
461	{	854	{
462	int i;	855	int i;
463		856
464	/* adjust periodics */	857	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	858	for (i = 0; i < periodiccnt; ++i)
466	{	859	{
467	struct ev_periodic *w = periodics [i];	860	struct ev_periodic *w = periodics [i];
468		861
469	if (w->interval)	862	if (w->interval)
470	{	863	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	864	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
472		865
473	if (fabs (diff) >= 1e-4)	866	if (fabs (diff) >= 1e-4)
474	{	867	{
475	evperiodic_stop (w);	868	ev_periodic_stop (EV_A_ w);
476	evperiodic_start (w);	869	ev_periodic_start (EV_A_ w);
477		870
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */	871	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	872	}
480	}	873	}
481	}	874	}
482
483	/* adjust timers. this is easy, as the offset is the same for all */
484	for (i = 0; i < timercnt; ++i)
485	timers [i]->at += diff;
486	}	875	}
487		876
		877	inline int
		878	time_update_monotonic (EV_P)
		879	{
		880	mn_now = get_clock ();
		881
		882	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		883	{
		884	rt_now = rtmn_diff + mn_now;
		885	return 0;
		886	}
		887	else
		888	{
		889	now_floor = mn_now;
		890	rt_now = ev_time ();
		891	return 1;
		892	}
		893	}
		894
488	static void	895	static void
489	time_update ()	896	time_update (EV_P)
490	{	897	{
491	int i;	898	int i;
492		899
493	ev_now = ev_time ();	900	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	901	if (expect_true (have_monotonic))
496	{	902	{
497	ev_tstamp odiff = diff;	903	if (time_update_monotonic (EV_A))
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	904	{
501	now = get_clock ();	905	ev_tstamp odiff = rtmn_diff;
		906
		907	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		908	{
502	diff = ev_now - now;	909	rtmn_diff = rt_now - mn_now;
503		910
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	911	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	912	return; /* all is well */
506		913
507	ev_now = ev_time ();	914	rt_now = ev_time ();
		915	mn_now = get_clock ();
		916	now_floor = mn_now;
		917	}
		918
		919	periodics_reschedule (EV_A);
		920	/* no timer adjustment, as the monotonic clock doesn't jump */
		921	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
508	}	922	}
509
510	time_jump (diff - odiff);
511	}	923	}
512	else	924	else
		925	#endif
513	{	926	{
514	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	927	rt_now = ev_time ();
515	time_jump (ev_now - now);
516		928
		929	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		930	{
		931	periodics_reschedule (EV_A);
		932
		933	/* adjust timers. this is easy, as the offset is the same for all */
		934	for (i = 0; i < timercnt; ++i)
		935	timers [i]->at += rt_now - mn_now;
		936	}
		937
517	now = ev_now;	938	mn_now = rt_now;
518	}	939	}
519	}	940	}
520		941
521	int ev_loop_done;	942	void
		943	ev_ref (EV_P)
		944	{
		945	++activecnt;
		946	}
522		947
		948	void
		949	ev_unref (EV_P)
		950	{
		951	--activecnt;
		952	}
		953
		954	static int loop_done;
		955
		956	void
523	void ev_loop (int flags)	957	ev_loop (EV_P_ int flags)
524	{	958	{
525	double block;	959	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	960	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
527
528	if (checkcnt)
529	{
530	queue_events ((W *)checks, checkcnt, EV_CHECK);
531	call_pending ();
532	}
533		961
534	do	962	do
535	{	963	{
		964	/* queue check watchers (and execute them) */
		965	if (expect_false (preparecnt))
		966	{
		967	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		968	call_pending (EV_A);
		969	}
		970
536	/* update fd-related kernel structures */	971	/* update fd-related kernel structures */
537	fd_reify ();	972	fd_reify (EV_A);
538		973
539	/* calculate blocking time */	974	/* calculate blocking time */
540		975
541	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	976	/* we only need this for !monotonic clockor timers, but as we basically
		977	always have timers, we just calculate it always */
		978	#if EV_USE_MONOTONIC
		979	if (expect_true (have_monotonic))
		980	time_update_monotonic (EV_A);
		981	else
		982	#endif
		983	{
542	ev_now = ev_time ();	984	rt_now = ev_time ();
		985	mn_now = rt_now;
		986	}
543		987
544	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	988	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
545	block = 0.;	989	block = 0.;
546	else	990	else
547	{	991	{
548	block = MAX_BLOCKTIME;	992	block = MAX_BLOCKTIME;
549		993
550	if (timercnt)	994	if (timercnt)
551	{	995	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	996	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
553	if (block > to) block = to;	997	if (block > to) block = to;
554	}	998	}
555		999
556	if (periodiccnt)	1000	if (periodiccnt)
557	{	1001	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1002	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
559	if (block > to) block = to;	1003	if (block > to) block = to;
560	}	1004	}
561		1005
562	if (block < 0.) block = 0.;	1006	if (block < 0.) block = 0.;
563	}	1007	}
564		1008
565	method_poll (block);	1009	method_poll (EV_A_ block);
566		1010
567	/* update ev_now, do magic */	1011	/* update rt_now, do magic */
568	time_update ();	1012	time_update (EV_A);
569		1013
570	/* queue pending timers and reschedule them */	1014	/* queue pending timers and reschedule them */
		1015	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	1016	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		1017
574	/* queue idle watchers unless io or timers are pending */	1018	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	1019	if (!pendingcnt)
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	1020	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		1021
578	/* queue check and possibly idle watchers */	1022	/* queue check watchers, to be executed first */
		1023	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	1024	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		1025
581	call_pending ();	1026	call_pending (EV_A);
582	}	1027	}
583	while (!ev_loop_done);	1028	while (activecnt && !loop_done);
		1029
		1030	if (loop_done != 2)
		1031	loop_done = 0;
		1032	}
		1033
		1034	void
		1035	ev_unloop (EV_P_ int how)
		1036	{
		1037	loop_done = how;
584	}	1038	}
585		1039
586	/*****************************************************************************/	1040	/*****************************************************************************/
587		1041
588	static void	1042	inline void
589	wlist_add (WL *head, WL elem)	1043	wlist_add (WL *head, WL elem)
590	{	1044	{
591	elem->next = *head;	1045	elem->next = *head;
592	*head = elem;	1046	*head = elem;
593	}	1047	}
594		1048
595	static void	1049	inline void
596	wlist_del (WL *head, WL elem)	1050	wlist_del (WL *head, WL elem)
597	{	1051	{
598	while (*head)	1052	while (*head)
599	{	1053	{
600	if (*head == elem)	1054	if (*head == elem)
…		…
605		1059
606	head = &(*head)->next;	1060	head = &(*head)->next;
607	}	1061	}
608	}	1062	}
609		1063
610	static void	1064	inline void
		1065	ev_clear_pending (EV_P_ W w)
		1066	{
		1067	if (w->pending)
		1068	{
		1069	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1070	w->pending = 0;
		1071	}
		1072	}
		1073
		1074	inline void
611	ev_start (W w, int active)	1075	ev_start (EV_P_ W w, int active)
612	{	1076	{
613	w->pending = 0;	1077	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1078	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1079
614	w->active = active;	1080	w->active = active;
		1081	ev_ref (EV_A);
615	}	1082	}
616		1083
617	static void	1084	inline void
618	ev_stop (W w)	1085	ev_stop (EV_P_ W w)
619	{	1086	{
620	if (w->pending)	1087	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1088	w->active = 0;
624	}	1089	}
625		1090
626	/*****************************************************************************/	1091	/*****************************************************************************/
627		1092
628	void	1093	void
629	evio_start (struct ev_io *w)	1094	ev_io_start (EV_P_ struct ev_io *w)
630	{	1095	{
		1096	int fd = w->fd;
		1097
631	if (ev_is_active (w))	1098	if (ev_is_active (w))
632	return;	1099	return;
633		1100
634	int fd = w->fd;	1101	assert (("ev_io_start called with negative fd", fd >= 0));
635		1102
636	ev_start ((W)w, 1);	1103	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1104	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1105	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		1106
640	++fdchangecnt;	1107	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	1108	}
644		1109
645	void	1110	void
646	evio_stop (struct ev_io *w)	1111	ev_io_stop (EV_P_ struct ev_io *w)
647	{	1112	{
		1113	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	1114	if (!ev_is_active (w))
649	return;	1115	return;
650		1116
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1117	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	1118	ev_stop (EV_A_ (W)w);
653		1119
654	++fdchangecnt;	1120	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1121	}
658		1122
659
660	void	1123	void
661	evtimer_start (struct ev_timer *w)	1124	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1125	{
663	if (ev_is_active (w))	1126	if (ev_is_active (w))
664	return;	1127	return;
665		1128
666	w->at += now;	1129	w->at += mn_now;
667		1130
		1131	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1132
668	ev_start ((W)w, ++timercnt);	1133	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1134	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;	1135	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1136	upheap ((WT *)timers, timercnt - 1);
672	}
673		1137
		1138	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1139	}
		1140
674	void	1141	void
675	evtimer_stop (struct ev_timer *w)	1142	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1143	{
		1144	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1145	if (!ev_is_active (w))
678	return;	1146	return;
679		1147
		1148	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1149
680	if (w->active < timercnt--)	1150	if (((W)w)->active < timercnt--)
681	{	1151	{
682	timers [w->active - 1] = timers [timercnt];	1152	timers [((W)w)->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1153	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
684	}	1154	}
685		1155
		1156	w->at = w->repeat;
		1157
686	ev_stop ((W)w);	1158	ev_stop (EV_A_ (W)w);
687	}	1159	}
688		1160
689	void	1161	void
690	evperiodic_start (struct ev_periodic *w)	1162	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1163	{
692	if (ev_is_active (w))	1164	if (ev_is_active (w))
		1165	{
		1166	if (w->repeat)
		1167	{
		1168	w->at = mn_now + w->repeat;
		1169	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1170	}
		1171	else
		1172	ev_timer_stop (EV_A_ w);
		1173	}
		1174	else if (w->repeat)
		1175	ev_timer_start (EV_A_ w);
		1176	}
		1177
		1178	void
		1179	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1180	{
		1181	if (ev_is_active (w))
693	return;	1182	return;
		1183
		1184	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694		1185
695	/* this formula differs from the one in periodic_reify because we do not always round up */	1186	/* this formula differs from the one in periodic_reify because we do not always round up */
696	if (w->interval)	1187	if (w->interval)
697	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1188	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
698		1189
699	ev_start ((W)w, ++periodiccnt);	1190	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1191	array_needsize (periodics, periodicmax, periodiccnt, );
701	periodics [periodiccnt - 1] = w;	1192	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1193	upheap ((WT *)periodics, periodiccnt - 1);
703	}
704		1194
		1195	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1196	}
		1197
705	void	1198	void
706	evperiodic_stop (struct ev_periodic *w)	1199	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1200	{
		1201	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1202	if (!ev_is_active (w))
709	return;	1203	return;
710		1204
		1205	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1206
711	if (w->active < periodiccnt--)	1207	if (((W)w)->active < periodiccnt--)
712	{	1208	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1209	periodics [((W)w)->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1210	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
715	}	1211	}
716		1212
717	ev_stop ((W)w);	1213	ev_stop (EV_A_ (W)w);
718	}	1214	}
719		1215
720	void	1216	void
721	evsignal_start (struct ev_signal *w)	1217	ev_idle_start (EV_P_ struct ev_idle *w)
722	{	1218	{
723	if (ev_is_active (w))	1219	if (ev_is_active (w))
724	return;	1220	return;
725		1221
		1222	ev_start (EV_A_ (W)w, ++idlecnt);
		1223	array_needsize (idles, idlemax, idlecnt, );
		1224	idles [idlecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_idle_stop (EV_P_ struct ev_idle *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	idles [((W)w)->active - 1] = idles [--idlecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++preparecnt);
		1245	array_needsize (prepares, preparemax, preparecnt, );
		1246	prepares [preparecnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	void
		1261	ev_check_start (EV_P_ struct ev_check *w)
		1262	{
		1263	if (ev_is_active (w))
		1264	return;
		1265
		1266	ev_start (EV_A_ (W)w, ++checkcnt);
		1267	array_needsize (checks, checkmax, checkcnt, );
		1268	checks [checkcnt - 1] = w;
		1269	}
		1270
		1271	void
		1272	ev_check_stop (EV_P_ struct ev_check *w)
		1273	{
		1274	ev_clear_pending (EV_A_ (W)w);
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	checks [((W)w)->active - 1] = checks [--checkcnt];
		1279	ev_stop (EV_A_ (W)w);
		1280	}
		1281
		1282	#ifndef SA_RESTART
		1283	# define SA_RESTART 0
		1284	#endif
		1285
		1286	void
		1287	ev_signal_start (EV_P_ struct ev_signal *w)
		1288	{
		1289	#if EV_MULTIPLICITY
		1290	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1291	#endif
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1296
726	ev_start ((W)w, 1);	1297	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1298	array_needsize (signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1299	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1300
730	if (!w->next)	1301	if (!w->next)
731	{	1302	{
732	struct sigaction sa;	1303	struct sigaction sa;
733	sa.sa_handler = sighandler;	1304	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1305	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1306	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1307	sigaction (w->signum, &sa, 0);
737	}	1308	}
738	}	1309	}
739		1310
740	void	1311	void
741	evsignal_stop (struct ev_signal *w)	1312	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1313	{
		1314	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1315	if (!ev_is_active (w))
744	return;	1316	return;
745		1317
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1318	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1319	ev_stop (EV_A_ (W)w);
748		1320
749	if (!signals [w->signum - 1].head)	1321	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1322	signal (w->signum, SIG_DFL);
751	}	1323	}
752		1324
753	void evidle_start (struct ev_idle *w)	1325	void
		1326	ev_child_start (EV_P_ struct ev_child *w)
754	{	1327	{
		1328	#if EV_MULTIPLICITY
		1329	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1330	#endif
755	if (ev_is_active (w))	1331	if (ev_is_active (w))
756	return;	1332	return;
757		1333
758	ev_start ((W)w, ++idlecnt);	1334	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	1335	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	1336	}
762		1337
763	void evidle_stop (struct ev_idle *w)	1338	void
		1339	ev_child_stop (EV_P_ struct ev_child *w)
764	{	1340	{
765	idles [w->active - 1] = idles [--idlecnt];	1341	ev_clear_pending (EV_A_ (W)w);
766	ev_stop ((W)w);
767	}
768
769	void evcheck_start (struct ev_check *w)
770	{
771	if (ev_is_active (w))	1342	if (ev_is_active (w))
772	return;	1343	return;
773		1344
774	ev_start ((W)w, ++checkcnt);	1345	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
775	array_needsize (checks, checkmax, checkcnt, );
776	checks [checkcnt - 1] = w;
777	}
778
779	void evcheck_stop (struct ev_check *w)
780	{
781	checks [w->active - 1] = checks [--checkcnt];
782	ev_stop ((W)w);	1346	ev_stop (EV_A_ (W)w);
783	}	1347	}
784		1348
785	/*****************************************************************************/	1349	/*****************************************************************************/
786		1350
787	#if 1	1351	struct ev_once
788		1352	{
789	struct ev_io wio;	1353	struct ev_io io;
790
791	static void
792	sin_cb (struct ev_io *w, int revents)
793	{
794	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
795	}
796
797	static void
798	ocb (struct ev_timer *w, int revents)
799	{
800	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
801	evtimer_stop (w);
802	evtimer_start (w);
803	}
804
805	static void
806	scb (struct ev_signal *w, int revents)
807	{
808	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
809	evio_stop (&wio);
810	evio_start (&wio);
811	}
812
813	static void
814	gcb (struct ev_signal *w, int revents)
815	{
816	fprintf (stderr, "generic %x\n", revents);
817
818	}
819
820	int main (void)
821	{
822	ev_init (0);
823
824	evio_init (&wio, sin_cb, 0, EV_READ);
825	evio_start (&wio);
826
827	struct ev_timer t[10000];
828
829	#if 0
830	int i;
831	for (i = 0; i < 10000; ++i)
832	{
833	struct ev_timer *w = t + i;
834	evw_init (w, ocb, i);
835	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
836	evtimer_start (w);
837	if (drand48 () < 0.5)
838	evtimer_stop (w);
839	}
840	#endif
841
842	struct ev_timer t1;	1354	struct ev_timer to;
843	evtimer_init (&t1, ocb, 5, 10);	1355	void (cb)(int revents, void arg);
844	evtimer_start (&t1);	1356	void *arg;
		1357	};
845		1358
846	struct ev_signal sig;	1359	static void
847	evsignal_init (&sig, scb, SIGQUIT);	1360	once_cb (EV_P_ struct ev_once *once, int revents)
848	evsignal_start (&sig);	1361	{
		1362	void (cb)(int revents, void arg) = once->cb;
		1363	void *arg = once->arg;
849		1364
850	struct ev_check cw;	1365	ev_io_stop (EV_A_ &once->io);
851	evcheck_init (&cw, gcb);	1366	ev_timer_stop (EV_A_ &once->to);
852	evcheck_start (&cw);	1367	free (once);
853		1368
854	struct ev_idle iw;	1369	cb (revents, arg);
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;
861	}	1370	}
862		1371
863	#endif	1372	static void
		1373	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1374	{
		1375	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1376	}
864		1377
		1378	static void
		1379	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1380	{
		1381	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1382	}
865		1383
		1384	void
		1385	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1386	{
		1387	struct ev_once *once = malloc (sizeof (struct ev_once));
866		1388
		1389	if (!once)
		1390	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1391	else
		1392	{
		1393	once->cb = cb;
		1394	once->arg = arg;
867		1395
		1396	ev_watcher_init (&once->io, once_cb_io);
		1397	if (fd >= 0)
		1398	{
		1399	ev_io_set (&once->io, fd, events);
		1400	ev_io_start (EV_A_ &once->io);
		1401	}
		1402
		1403	ev_watcher_init (&once->to, once_cb_to);
		1404	if (timeout >= 0.)
		1405	{
		1406	ev_timer_set (&once->to, timeout, 0.);
		1407	ev_timer_start (EV_A_ &once->to);
		1408	}
		1409	}
		1410	}
		1411

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Comparing libev/ev.c (file contents): Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs. Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC