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

Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.65 by root, Sun Nov 4 23:29:48 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
		75	/**/
		76
14	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
15	# ifdef CLOCK_MONOTONIC
16	# 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
17	# endif	102	# endif
18	#endif	103	#endif
19		104
20	#ifndef HAVE_SELECT
21	# define HAVE_SELECT 1
22	#endif
23
24	#ifndef HAVE_EPOLL
25	# define HAVE_EPOLL 0
26	#endif
27
28	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
30	#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	/**/
31		122
32	#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) */
33	#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 */
34		127
35	#include "ev.h"	128	#include "ev.h"
36		129
37	struct ev_watcher {	130	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	131	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
40		137
41	struct ev_watcher_list {	138	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	139	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		143
45	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
		146	typedef struct ev_watcher_time *WT;
47		147
48	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
49	ev_tstamp ev_now;
50	int ev_method;
51
52	static int have_monotonic; /* runtime */
53
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		149
58	/*****************************************************************************/	150	/*****************************************************************************/
59		151
60	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
61	ev_time (void)	186	ev_time (void)
62	{	187	{
63	#if HAVE_REALTIME	188	#if EV_USE_REALTIME
64	struct timespec ts;	189	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	191	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	192	#else
68	struct timeval tv;	193	struct timeval tv;
69	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	196	#endif
72	}	197	}
73		198
74	static ev_tstamp	199	inline ev_tstamp
75	get_clock (void)	200	get_clock (void)
76	{	201	{
77	#if HAVE_MONOTONIC	202	#if EV_USE_MONOTONIC
78	if (have_monotonic)	203	if (expect_true (have_monotonic))
79	{	204	{
80	struct timespec ts;	205	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	208	}
84	#endif	209	#endif
85		210
86	return ev_time ();	211	return ev_time ();
87	}	212	}
88		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
89	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
91	{ \	224	{ \
92	int newcnt = cur ? cur << 1 : 16; \	225	int newcnt = cur; \
93	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	\
94	base = realloc (base, sizeof (base) (newcnt)); \	232	base = realloc (base, sizeof (base) (newcnt)); \
95	init (base + cur, newcnt - cur); \	233	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	234	cur = newcnt; \
97	}	235	}
98		236
		237	#define array_free(stem, idx) \
		238	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		239
99	/*****************************************************************************/	240	/*****************************************************************************/
100		241
101	typedef struct
102	{
103	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	242	static void
114	anfds_init (ANFD *base, int count)	243	anfds_init (ANFD *base, int count)
115	{	244	{
116	while (count--)	245	while (count--)
117	{	246	{
118	base->head = 0;	247	base->head = 0;
119	base->wev = base->rev = EV_NONE;	248	base->events = EV_NONE;
		249	base->reify = 0;
		250
120	++base;	251	++base;
121	}	252	}
122	}	253	}
123		254
124	typedef struct
125	{
126	W w;
127	int events;
128	} ANPENDING;
129
130	static ANPENDING *pendings;
131	static int pendingmax, pendingcnt;
132
133	static void	255	static void
134	event (W w, int events)	256	event (EV_P_ W w, int events)
135	{	257	{
		258	if (w->pending)
		259	{
		260	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		261	return;
		262	}
		263
136	w->pending = ++pendingcnt;	264	w->pending = ++pendingcnt [ABSPRI (w)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	265	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
138	pendings [pendingcnt - 1].w = w;	266	pendings [ABSPRI (w)][w->pending - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	267	pendings [ABSPRI (w)][w->pending - 1].events = events;
140	}	268	}
141		269
142	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
143	fd_event (int fd, int events)	280	fd_event (EV_P_ int fd, int events)
144	{	281	{
145	ANFD *anfd = anfds + fd;	282	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	283	struct ev_io *w;
147		284
148	for (w = anfd->head; w; w = w->next)	285	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
149	{	286	{
150	int ev = w->events & events;	287	int ev = w->events & events;
151		288
152	if (ev)	289	if (ev)
153	event ((W)w, ev);	290	event (EV_A_ (W)w, ev);
154	}	291	}
155	}	292	}
156		293
		294	/*****************************************************************************/
		295
157	static void	296	static void
158	queue_events (W *events, int eventcnt, int type)	297	fd_reify (EV_P)
159	{	298	{
160	int i;	299	int i;
161		300
162	for (i = 0; i < eventcnt; ++i)	301	for (i = 0; i < fdchangecnt; ++i)
163	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	}
164	}	386	}
165		387
166	/*****************************************************************************/	388	/*****************************************************************************/
167		389
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void	390	static void
175	upheap (struct ev_timer **timers, int k)	391	upheap (WT *heap, int k)
176	{	392	{
177	struct ev_timer *w = timers [k];	393	WT w = heap [k];
178		394
179	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
180	{	396	{
181	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
182	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
183	k >>= 1;	399	k >>= 1;
184	}	400	}
185		401
186	timers [k] = w;	402	heap [k] = w;
187	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
188		404
189	}	405	}
190		406
191	static void	407	static void
192	downheap (struct ev_timer **timers, int N, int k)	408	downheap (WT *heap, int N, int k)
193	{	409	{
194	struct ev_timer *w = timers [k];	410	WT w = heap [k];
195		411
196	while (k < (N >> 1))	412	while (k < (N >> 1))
197	{	413	{
198	int j = k << 1;	414	int j = k << 1;
199		415
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
201	++j;	417	++j;
202		418
203	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
204	break;	420	break;
205		421
206	timers [k] = timers [j];	422	heap [k] = heap [j];
207	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
208	k = j;	424	k = j;
209	}	425	}
210		426
211	timers [k] = w;	427	heap [k] = w;
212	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
213	}	429	}
214		430
215	/*****************************************************************************/	431	/*****************************************************************************/
216		432
217	typedef struct	433	typedef struct
218	{	434	{
219	struct ev_signal *head;	435	struct ev_watcher_list *head;
220	sig_atomic_t gotsig;	436	sig_atomic_t volatile gotsig;
221	} ANSIG;	437	} ANSIG;
222		438
223	static ANSIG *signals;	439	static ANSIG *signals;
224	static int signalmax;	440	static int signalmax;
225		441
226	static int sigpipe [2];	442	static int sigpipe [2];
227	static sig_atomic_t gotsig;	443	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	444	static struct ev_io sigev;
229		445
230	static void	446	static void
231	signals_init (ANSIG *base, int count)	447	signals_init (ANSIG *base, int count)
232	{	448	{
233	while (count--)	449	while (count--)
234	{	450	{
235	base->head = 0;	451	base->head = 0;
236	base->gotsig = 0;	452	base->gotsig = 0;
		453
237	++base;	454	++base;
238	}	455	}
239	}	456	}
240		457
241	static void	458	static void
243	{	460	{
244	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
245		462
246	if (!gotsig)	463	if (!gotsig)
247	{	464	{
		465	int old_errno = errno;
248	gotsig = 1;	466	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
250	}	469	}
251	}	470	}
252		471
253	static void	472	static void
254	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	474	{
256	struct ev_signal *w;	475	struct ev_watcher_list *w;
257	int sig;	476	int signum;
258		477
		478	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	479	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		480
262	for (sig = signalmax; sig--; )	481	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	482	if (signals [signum].gotsig)
264	{	483	{
265	signals [sig].gotsig = 0;	484	signals [signum].gotsig = 0;
266		485
267	for (w = signals [sig].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
269	}	488	}
270	}	489	}
271		490
272	static void	491	static void
273	siginit (void)	492	siginit (EV_P)
274	{	493	{
		494	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		497
278	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
281		502
282	evio_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
284	}	506	}
285		507
286	/*****************************************************************************/	508	/*****************************************************************************/
287		509
288	static struct ev_idle **idles;	510	#ifndef WIN32
289	static int idlemax, idlecnt;
290		511
291	static struct ev_check **checks;	512	static struct ev_child *childs [PID_HASHSIZE];
292	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
293		550
294	/*****************************************************************************/	551	/*****************************************************************************/
295		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
296	#if HAVE_EPOLL	556	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	557	# include "ev_epoll.c"
298	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
299	#if HAVE_SELECT	562	#if EV_USE_SELECT
300	# include "ev_select.c"	563	# include "ev_select.c"
301	#endif	564	#endif
302		565
303	int ev_init (int flags)	566	int
		567	ev_version_major (void)
304	{	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	{
305	#if HAVE_MONOTONIC	601	#if EV_USE_MONOTONIC
306	{	602	{
307	struct timespec ts;	603	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	605	have_monotonic = 1;
310	}	606	}
311	#endif	607	#endif
312		608
313	ev_now = ev_time ();	609	rt_now = ev_time ();
314	now = get_clock ();	610	mn_now = get_clock ();
315	diff = ev_now - now;	611	now_floor = mn_now;
		612	rtmn_diff = rt_now - mn_now;
316		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])
317	if (pipe (sigpipe))	728	if (pipe (sigpipe))
318	return 0;	729	return 0;
319		730
320	ev_method = EVMETHOD_NONE;	731	if (!default_loop)
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{	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	{
330	evw_init (&sigev, sigcb, 0);	743	ev_watcher_init (&sigev, sigcb);
		744	ev_set_priority (&sigev, EV_MAXPRI);
331	siginit ();	745	siginit (EV_A);
332	}
333		746
334	return ev_method;	747	#ifndef WIN32
335	}	748	ev_signal_init (&childev, childcb, SIGCHLD);
336		749	ev_set_priority (&childev, EV_MAXPRI);
337	/*****************************************************************************/	750	ev_signal_start (EV_A_ &childev);
338		751	ev_unref (EV_A); /* child watcher should not keep loop alive */
339	void ev_prefork (void)
340	{
341	}
342
343	void ev_postfork_parent (void)
344	{
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif	752	#endif
		753	}
		754	else
		755	default_loop = 0;
		756	}
353		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 */
354	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);
355	close (sigpipe [0]);	790	close (sigpipe [0]);
356	close (sigpipe [1]);	791	close (sigpipe [1]);
357	pipe (sigpipe);	792	pipe (sigpipe);
		793
		794	ev_ref (EV_A); /* signal watcher */
358	siginit ();	795	siginit (EV_A);
359	}	796	}
360		797
361	/*****************************************************************************/	798	/*****************************************************************************/
362		799
363	static void	800	static void
364	fd_reify (void)	801	call_pending (EV_P)
365	{	802	{
366	int i;	803	int pri;
367		804
368	for (i = 0; i < fdchangecnt; ++i)	805	for (pri = NUMPRI; pri--; )
369	{	806	while (pendingcnt [pri])
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{	807	{
381	method_modify (fd, anfd->wev, wev);	808	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
382	anfd->wev = wev;
383	}
384	}
385		809
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)	810	if (p->w)
399	{	811	{
400	p->w->pending = 0;	812	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	813
		814	((void (*)(EV_P_ W, int))p->w->cb) (EV_A_ p->w, p->events);
402	}	815	}
403	}	816	}
404
405	pendingcnt = 0;
406	}	817	}
407		818
408	static void	819	static void
409	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	820	timers_reify (EV_P)
410	{	821	{
411	while (timercnt && timers [0]->at <= now)	822	while (timercnt && ((WT)timers [0])->at <= mn_now)
412	{	823	{
413	struct ev_timer *w = timers [0];	824	struct ev_timer *w = timers [0];
		825
		826	assert (("inactive timer on timer heap detected", ev_is_active (w)));
414		827
415	/* first reschedule or stop timer */	828	/* first reschedule or stop timer */
416	if (w->repeat)	829	if (w->repeat)
417	{	830	{
418	if (w->is_abs)	831	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
419	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
420	else
421	w->at = now + w->repeat;	832	((WT)w)->at = mn_now + w->repeat;
422
423	assert (w->at > now);
424
425	downheap (timers, timercnt, 0);	833	downheap ((WT *)timers, timercnt, 0);
426	}	834	}
427	else	835	else
		836	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		837
		838	event (EV_A_ (W)w, EV_TIMEOUT);
		839	}
		840	}
		841
		842	static void
		843	periodics_reify (EV_P)
		844	{
		845	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		846	{
		847	struct ev_periodic *w = periodics [0];
		848
		849	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		850
		851	/* first reschedule or stop timer */
		852	if (w->interval)
428	{	853	{
429	evtimer_stop (w); /* nonrepeating: stop timer */	854	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
430	--timercnt; /* maybe pass by reference instead? */	855	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		856	downheap ((WT *)periodics, periodiccnt, 0);
431	}	857	}
		858	else
		859	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
432		860
433	event ((W)w, EV_TIMEOUT);	861	event (EV_A_ (W)w, EV_PERIODIC);
434	}	862	}
435	}	863	}
436		864
437	static void	865	static void
438	time_update ()	866	periodics_reschedule (EV_P)
439	{	867	{
440	int i;	868	int i;
441	ev_now = ev_time ();
442		869
443	if (have_monotonic)	870	/* adjust periodics after time jump */
		871	for (i = 0; i < periodiccnt; ++i)
444	{	872	{
445	ev_tstamp odiff = diff;	873	struct ev_periodic *w = periodics [i];
446		874
447	/* detecting time jumps is much more difficult */	875	if (w->interval)
448	for (i = 2; --i; ) /* loop a few times, before making important decisions */
449	{	876	{
450	now = get_clock ();	877	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
451	diff = ev_now - now;
452		878
453	if (fabs (odiff - diff) < MIN_TIMEJUMP)	879	if (fabs (diff) >= 1e-4)
454	return; /* all is well */	880	{
		881	ev_periodic_stop (EV_A_ w);
		882	ev_periodic_start (EV_A_ w);
455		883
456	ev_now = ev_time ();	884	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		885	}
457	}	886	}
		887	}
		888	}
458		889
459	/* time jump detected, reschedule atimers */	890	inline int
460	for (i = 0; i < atimercnt; ++i)	891	time_update_monotonic (EV_P)
		892	{
		893	mn_now = get_clock ();
		894
		895	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		896	{
		897	rt_now = rtmn_diff + mn_now;
		898	return 0;
		899	}
		900	else
		901	{
		902	now_floor = mn_now;
		903	rt_now = ev_time ();
		904	return 1;
		905	}
		906	}
		907
		908	static void
		909	time_update (EV_P)
		910	{
		911	int i;
		912
		913	#if EV_USE_MONOTONIC
		914	if (expect_true (have_monotonic))
		915	{
		916	if (time_update_monotonic (EV_A))
461	{	917	{
462	struct ev_timer *w = atimers [i];	918	ev_tstamp odiff = rtmn_diff;
463	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	919
		920	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		921	{
		922	rtmn_diff = rt_now - mn_now;
		923
		924	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		925	return; /* all is well */
		926
		927	rt_now = ev_time ();
		928	mn_now = get_clock ();
		929	now_floor = mn_now;
		930	}
		931
		932	periodics_reschedule (EV_A);
		933	/* no timer adjustment, as the monotonic clock doesn't jump */
		934	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
464	}	935	}
465	}	936	}
466	else	937	else
		938	#endif
467	{	939	{
468	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	940	rt_now = ev_time ();
469	/* time jump detected, adjust rtimers */	941
		942	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		943	{
		944	periodics_reschedule (EV_A);
		945
		946	/* adjust timers. this is easy, as the offset is the same for all */
470	for (i = 0; i < rtimercnt; ++i)	947	for (i = 0; i < timercnt; ++i)
471	rtimers [i]->at += ev_now - now;	948	((WT)timers [i])->at += rt_now - mn_now;
		949	}
472		950
473	now = ev_now;	951	mn_now = rt_now;
474	}	952	}
475	}	953	}
476		954
477	int ev_loop_done;	955	void
		956	ev_ref (EV_P)
		957	{
		958	++activecnt;
		959	}
478		960
		961	void
		962	ev_unref (EV_P)
		963	{
		964	--activecnt;
		965	}
		966
		967	static int loop_done;
		968
		969	void
479	void ev_loop (int flags)	970	ev_loop (EV_P_ int flags)
480	{	971	{
481	double block;	972	double block;
482	ev_loop_done = flags & EVLOOP_ONESHOT;	973	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
483
484	if (checkcnt)
485	{
486	queue_events ((W *)checks, checkcnt, EV_CHECK);
487	call_pending ();
488	}
489		974
490	do	975	do
491	{	976	{
		977	/* queue check watchers (and execute them) */
		978	if (expect_false (preparecnt))
		979	{
		980	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		981	call_pending (EV_A);
		982	}
		983
492	/* update fd-related kernel structures */	984	/* update fd-related kernel structures */
493	fd_reify ();	985	fd_reify (EV_A);
494		986
495	/* calculate blocking time */	987	/* calculate blocking time */
		988
		989	/* we only need this for !monotonic clockor timers, but as we basically
		990	always have timers, we just calculate it always */
		991	#if EV_USE_MONOTONIC
		992	if (expect_true (have_monotonic))
		993	time_update_monotonic (EV_A);
		994	else
		995	#endif
		996	{
		997	rt_now = ev_time ();
		998	mn_now = rt_now;
		999	}
		1000
496	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1001	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
497	block = 0.;	1002	block = 0.;
498	else	1003	else
499	{	1004	{
500	block = MAX_BLOCKTIME;	1005	block = MAX_BLOCKTIME;
501		1006
502	if (rtimercnt)	1007	if (timercnt)
503	{	1008	{
504	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1009	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
505	if (block > to) block = to;	1010	if (block > to) block = to;
506	}	1011	}
507		1012
508	if (atimercnt)	1013	if (periodiccnt)
509	{	1014	{
510	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1015	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
511	if (block > to) block = to;	1016	if (block > to) block = to;
512	}	1017	}
513		1018
514	if (block < 0.) block = 0.;	1019	if (block < 0.) block = 0.;
515	}	1020	}
516		1021
517	method_poll (block);	1022	method_poll (EV_A_ block);
518		1023
519	/* update ev_now, do magic */	1024	/* update rt_now, do magic */
520	time_update ();	1025	time_update (EV_A);
521		1026
522	/* queue pending timers and reschedule them */	1027	/* queue pending timers and reschedule them */
523	/* absolute timers first */	1028	timers_reify (EV_A); /* relative timers called last */
524	timers_reify (atimers, atimercnt, ev_now);	1029	periodics_reify (EV_A); /* absolute timers called first */
525	/* relative timers second */
526	timers_reify (rtimers, rtimercnt, now);
527		1030
528	/* queue idle watchers unless io or timers are pending */	1031	/* queue idle watchers unless io or timers are pending */
529	if (!pendingcnt)	1032	if (!pendingcnt)
530	queue_events ((W *)idles, idlecnt, EV_IDLE);	1033	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
531		1034
532	/* queue check and possibly idle watchers */	1035	/* queue check watchers, to be executed first */
		1036	if (checkcnt)
533	queue_events ((W *)checks, checkcnt, EV_CHECK);	1037	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
534		1038
535	call_pending ();	1039	call_pending (EV_A);
536	}	1040	}
537	while (!ev_loop_done);	1041	while (activecnt && !loop_done);
		1042
		1043	if (loop_done != 2)
		1044	loop_done = 0;
		1045	}
		1046
		1047	void
		1048	ev_unloop (EV_P_ int how)
		1049	{
		1050	loop_done = how;
538	}	1051	}
539		1052
540	/*****************************************************************************/	1053	/*****************************************************************************/
541		1054
542	static void	1055	inline void
543	wlist_add (WL *head, WL elem)	1056	wlist_add (WL *head, WL elem)
544	{	1057	{
545	elem->next = *head;	1058	elem->next = *head;
546	*head = elem;	1059	*head = elem;
547	}	1060	}
548		1061
549	static void	1062	inline void
550	wlist_del (WL *head, WL elem)	1063	wlist_del (WL *head, WL elem)
551	{	1064	{
552	while (*head)	1065	while (*head)
553	{	1066	{
554	if (*head == elem)	1067	if (*head == elem)
…		…
559		1072
560	head = &(*head)->next;	1073	head = &(*head)->next;
561	}	1074	}
562	}	1075	}
563		1076
564	static void	1077	inline void
		1078	ev_clear_pending (EV_P_ W w)
		1079	{
		1080	if (w->pending)
		1081	{
		1082	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1083	w->pending = 0;
		1084	}
		1085	}
		1086
		1087	inline void
565	ev_start (W w, int active)	1088	ev_start (EV_P_ W w, int active)
566	{	1089	{
567	w->pending = 0;	1090	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1091	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1092
568	w->active = active;	1093	w->active = active;
		1094	ev_ref (EV_A);
569	}	1095	}
570		1096
571	static void	1097	inline void
572	ev_stop (W w)	1098	ev_stop (EV_P_ W w)
573	{	1099	{
574	if (w->pending)	1100	ev_unref (EV_A);
575	pendings [w->pending - 1].w = 0;
576
577	w->active = 0;	1101	w->active = 0;
578	/* nop */
579	}	1102	}
580		1103
581	/*****************************************************************************/	1104	/*****************************************************************************/
582		1105
583	void	1106	void
584	evio_start (struct ev_io *w)	1107	ev_io_start (EV_P_ struct ev_io *w)
585	{	1108	{
		1109	int fd = w->fd;
		1110
586	if (ev_is_active (w))	1111	if (ev_is_active (w))
587	return;	1112	return;
588		1113
589	int fd = w->fd;	1114	assert (("ev_io_start called with negative fd", fd >= 0));
590		1115
591	ev_start ((W)w, 1);	1116	ev_start (EV_A_ (W)w, 1);
592	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1117	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
593	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1118	wlist_add ((WL *)&anfds[fd].head, (WL)w);
594		1119
595	++fdchangecnt;	1120	fd_change (EV_A_ fd);
596	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
597	fdchanges [fdchangecnt - 1] = fd;
598	}	1121	}
599		1122
600	void	1123	void
601	evio_stop (struct ev_io *w)	1124	ev_io_stop (EV_P_ struct ev_io *w)
602	{	1125	{
		1126	ev_clear_pending (EV_A_ (W)w);
603	if (!ev_is_active (w))	1127	if (!ev_is_active (w))
604	return;	1128	return;
605		1129
606	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1130	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
607	ev_stop ((W)w);	1131	ev_stop (EV_A_ (W)w);
608		1132
609	++fdchangecnt;	1133	fd_change (EV_A_ w->fd);
610	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
611	fdchanges [fdchangecnt - 1] = w->fd;
612	}	1134	}
613		1135
614	void	1136	void
615	evtimer_start (struct ev_timer *w)	1137	ev_timer_start (EV_P_ struct ev_timer *w)
616	{	1138	{
617	if (ev_is_active (w))	1139	if (ev_is_active (w))
618	return;	1140	return;
619		1141
620	if (w->is_abs)	1142	((WT)w)->at += mn_now;
		1143
		1144	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1145
		1146	ev_start (EV_A_ (W)w, ++timercnt);
		1147	array_needsize (timers, timermax, timercnt, );
		1148	timers [timercnt - 1] = w;
		1149	upheap ((WT *)timers, timercnt - 1);
		1150
		1151	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1152	}
		1153
		1154	void
		1155	ev_timer_stop (EV_P_ struct ev_timer *w)
		1156	{
		1157	ev_clear_pending (EV_A_ (W)w);
		1158	if (!ev_is_active (w))
		1159	return;
		1160
		1161	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1162
		1163	if (((W)w)->active < timercnt--)
		1164	{
		1165	timers [((W)w)->active - 1] = timers [timercnt];
		1166	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
621	{	1167	}
622	/* this formula differs from the one in timer_reify becuse we do not round up */	1168
		1169	((WT)w)->at = w->repeat;
		1170
		1171	ev_stop (EV_A_ (W)w);
		1172	}
		1173
		1174	void
		1175	ev_timer_again (EV_P_ struct ev_timer *w)
		1176	{
		1177	if (ev_is_active (w))
		1178	{
623	if (w->repeat)	1179	if (w->repeat)
624	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1180	{
625		1181	((WT)w)->at = mn_now + w->repeat;
626	ev_start ((W)w, ++atimercnt);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
627	array_needsize (atimers, atimermax, atimercnt, );	1183	}
628	atimers [atimercnt - 1] = w;
629	upheap (atimers, atimercnt - 1);
630	}
631	else	1184	else
		1185	ev_timer_stop (EV_A_ w);
632	{	1186	}
633	w->at += now;	1187	else if (w->repeat)
634		1188	ev_timer_start (EV_A_ w);
635	ev_start ((W)w, ++rtimercnt);
636	array_needsize (rtimers, rtimermax, rtimercnt, );
637	rtimers [rtimercnt - 1] = w;
638	upheap (rtimers, rtimercnt - 1);
639	}
640
641	}	1189	}
642		1190
643	void	1191	void
644	evtimer_stop (struct ev_timer *w)	1192	ev_periodic_start (EV_P_ struct ev_periodic *w)
645	{	1193	{
		1194	if (ev_is_active (w))
		1195	return;
		1196
		1197	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1198
		1199	/* this formula differs from the one in periodic_reify because we do not always round up */
		1200	if (w->interval)
		1201	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1202
		1203	ev_start (EV_A_ (W)w, ++periodiccnt);
		1204	array_needsize (periodics, periodicmax, periodiccnt, );
		1205	periodics [periodiccnt - 1] = w;
		1206	upheap ((WT *)periodics, periodiccnt - 1);
		1207
		1208	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1209	}
		1210
		1211	void
		1212	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1213	{
		1214	ev_clear_pending (EV_A_ (W)w);
646	if (!ev_is_active (w))	1215	if (!ev_is_active (w))
647	return;	1216	return;
648		1217
649	if (w->is_abs)	1218	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
650	{	1219
651	if (w->active < atimercnt--)	1220	if (((W)w)->active < periodiccnt--)
652	{
653	atimers [w->active - 1] = atimers [atimercnt];
654	downheap (atimers, atimercnt, w->active - 1);
655	}
656	}	1221	{
657	else	1222	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1223	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
658	{	1224	}
659	if (w->active < rtimercnt--)
660	{
661	rtimers [w->active - 1] = rtimers [rtimercnt];
662	downheap (rtimers, rtimercnt, w->active - 1);
663	}
664	}
665		1225
666	ev_stop ((W)w);	1226	ev_stop (EV_A_ (W)w);
667	}	1227	}
668		1228
669	void	1229	void
670	evsignal_start (struct ev_signal *w)	1230	ev_idle_start (EV_P_ struct ev_idle *w)
671	{	1231	{
672	if (ev_is_active (w))	1232	if (ev_is_active (w))
673	return;	1233	return;
674		1234
		1235	ev_start (EV_A_ (W)w, ++idlecnt);
		1236	array_needsize (idles, idlemax, idlecnt, );
		1237	idles [idlecnt - 1] = w;
		1238	}
		1239
		1240	void
		1241	ev_idle_stop (EV_P_ struct ev_idle *w)
		1242	{
		1243	ev_clear_pending (EV_A_ (W)w);
		1244	if (ev_is_active (w))
		1245	return;
		1246
		1247	idles [((W)w)->active - 1] = idles [--idlecnt];
		1248	ev_stop (EV_A_ (W)w);
		1249	}
		1250
		1251	void
		1252	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1253	{
		1254	if (ev_is_active (w))
		1255	return;
		1256
		1257	ev_start (EV_A_ (W)w, ++preparecnt);
		1258	array_needsize (prepares, preparemax, preparecnt, );
		1259	prepares [preparecnt - 1] = w;
		1260	}
		1261
		1262	void
		1263	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1264	{
		1265	ev_clear_pending (EV_A_ (W)w);
		1266	if (ev_is_active (w))
		1267	return;
		1268
		1269	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1270	ev_stop (EV_A_ (W)w);
		1271	}
		1272
		1273	void
		1274	ev_check_start (EV_P_ struct ev_check *w)
		1275	{
		1276	if (ev_is_active (w))
		1277	return;
		1278
		1279	ev_start (EV_A_ (W)w, ++checkcnt);
		1280	array_needsize (checks, checkmax, checkcnt, );
		1281	checks [checkcnt - 1] = w;
		1282	}
		1283
		1284	void
		1285	ev_check_stop (EV_P_ struct ev_check *w)
		1286	{
		1287	ev_clear_pending (EV_A_ (W)w);
		1288	if (ev_is_active (w))
		1289	return;
		1290
		1291	checks [((W)w)->active - 1] = checks [--checkcnt];
		1292	ev_stop (EV_A_ (W)w);
		1293	}
		1294
		1295	#ifndef SA_RESTART
		1296	# define SA_RESTART 0
		1297	#endif
		1298
		1299	void
		1300	ev_signal_start (EV_P_ struct ev_signal *w)
		1301	{
		1302	#if EV_MULTIPLICITY
		1303	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1304	#endif
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1309
675	ev_start ((W)w, 1);	1310	ev_start (EV_A_ (W)w, 1);
676	array_needsize (signals, signalmax, w->signum, signals_init);	1311	array_needsize (signals, signalmax, w->signum, signals_init);
677	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1312	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
678		1313
679	if (!w->next)	1314	if (!((WL)w)->next)
680	{	1315	{
681	struct sigaction sa;	1316	struct sigaction sa;
682	sa.sa_handler = sighandler;	1317	sa.sa_handler = sighandler;
683	sigfillset (&sa.sa_mask);	1318	sigfillset (&sa.sa_mask);
684	sa.sa_flags = 0;	1319	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
685	sigaction (w->signum, &sa, 0);	1320	sigaction (w->signum, &sa, 0);
686	}	1321	}
687	}	1322	}
688		1323
689	void	1324	void
690	evsignal_stop (struct ev_signal *w)	1325	ev_signal_stop (EV_P_ struct ev_signal *w)
691	{	1326	{
		1327	ev_clear_pending (EV_A_ (W)w);
692	if (!ev_is_active (w))	1328	if (!ev_is_active (w))
693	return;	1329	return;
694		1330
695	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1331	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
696	ev_stop ((W)w);	1332	ev_stop (EV_A_ (W)w);
697		1333
698	if (!signals [w->signum - 1].head)	1334	if (!signals [w->signum - 1].head)
699	signal (w->signum, SIG_DFL);	1335	signal (w->signum, SIG_DFL);
700	}	1336	}
701		1337
702	void evidle_start (struct ev_idle *w)	1338	void
		1339	ev_child_start (EV_P_ struct ev_child *w)
703	{	1340	{
		1341	#if EV_MULTIPLICITY
		1342	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1343	#endif
704	if (ev_is_active (w))	1344	if (ev_is_active (w))
705	return;	1345	return;
706		1346
707	ev_start ((W)w, ++idlecnt);	1347	ev_start (EV_A_ (W)w, 1);
708	array_needsize (idles, idlemax, idlecnt, );	1348	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
709	idles [idlecnt - 1] = w;
710	}	1349	}
711		1350
712	void evidle_stop (struct ev_idle *w)	1351	void
		1352	ev_child_stop (EV_P_ struct ev_child *w)
713	{	1353	{
714	idles [w->active - 1] = idles [--idlecnt];	1354	ev_clear_pending (EV_A_ (W)w);
715	ev_stop ((W)w);
716	}
717
718	void evcheck_start (struct ev_check *w)
719	{
720	if (ev_is_active (w))	1355	if (ev_is_active (w))
721	return;	1356	return;
722		1357
723	ev_start ((W)w, ++checkcnt);	1358	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
724	array_needsize (checks, checkmax, checkcnt, );
725	checks [checkcnt - 1] = w;
726	}
727
728	void evcheck_stop (struct ev_check *w)
729	{
730	checks [w->active - 1] = checks [--checkcnt];
731	ev_stop ((W)w);	1359	ev_stop (EV_A_ (W)w);
732	}	1360	}
733		1361
734	/*****************************************************************************/	1362	/*****************************************************************************/
735		1363
736	#if 0	1364	struct ev_once
737
738	static void
739	sin_cb (struct ev_io *w, int revents)
740	{	1365	{
741	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
742	}
743
744	static void
745	ocb (struct ev_timer *w, int revents)
746	{
747	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
748	evtimer_stop (w);
749	evtimer_start (w);
750	}
751
752	static void
753	scb (struct ev_signal *w, int revents)
754	{
755	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
756	}
757
758	static void
759	gcb (struct ev_signal *w, int revents)
760	{
761	fprintf (stderr, "generic %x\n", revents);
762	}
763
764	int main (void)
765	{
766	struct ev_io sin;	1366	struct ev_io io;
767
768	ev_init (0);
769
770	evw_init (&sin, sin_cb, 55);
771	evio_set (&sin, 0, EV_READ);
772	evio_start (&sin);
773
774	struct ev_timer t[10000];
775
776	#if 0
777	int i;
778	for (i = 0; i < 10000; ++i)
779	{
780	struct ev_timer *w = t + i;
781	evw_init (w, ocb, i);
782	evtimer_set_abs (w, drand48 (), 0.99775533);
783	evtimer_start (w);
784	if (drand48 () < 0.5)
785	evtimer_stop (w);
786	}
787	#endif
788
789	struct ev_timer t1;	1367	struct ev_timer to;
790	evw_init (&t1, ocb, 0);	1368	void (cb)(int revents, void arg);
791	evtimer_set_abs (&t1, 5, 10);	1369	void *arg;
792	evtimer_start (&t1);	1370	};
793		1371
794	struct ev_signal sig;	1372	static void
795	evw_init (&sig, scb, 65535);	1373	once_cb (EV_P_ struct ev_once *once, int revents)
796	evsignal_set (&sig, SIGQUIT);	1374	{
797	evsignal_start (&sig);	1375	void (cb)(int revents, void arg) = once->cb;
		1376	void *arg = once->arg;
798		1377
799	struct ev_check cw;	1378	ev_io_stop (EV_A_ &once->io);
800	evw_init (&cw, gcb, 0);	1379	ev_timer_stop (EV_A_ &once->to);
801	evcheck_start (&cw);	1380	free (once);
802		1381
803	struct ev_idle iw;	1382	cb (revents, arg);
804	evw_init (&iw, gcb, 0);
805	evidle_start (&iw);
806
807	ev_loop (0);
808
809	return 0;
810	}	1383	}
811		1384
812	#endif	1385	static void
		1386	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1387	{
		1388	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1389	}
813		1390
		1391	static void
		1392	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1393	{
		1394	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1395	}
814		1396
		1397	void
		1398	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1399	{
		1400	struct ev_once *once = malloc (sizeof (struct ev_once));
815		1401
		1402	if (!once)
		1403	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1404	else
		1405	{
		1406	once->cb = cb;
		1407	once->arg = arg;
816		1408
		1409	ev_watcher_init (&once->io, once_cb_io);
		1410	if (fd >= 0)
		1411	{
		1412	ev_io_set (&once->io, fd, events);
		1413	ev_io_start (EV_A_ &once->io);
		1414	}
		1415
		1416	ev_watcher_init (&once->to, once_cb_to);
		1417	if (timeout >= 0.)
		1418	{
		1419	ev_timer_set (&once->to, timeout, 0.);
		1420	ev_timer_start (EV_A_ &once->to);
		1421	}
		1422	}
		1423	}
		1424

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Comparing libev/ev.c (file contents): Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs. Revision 1.65 by root, Sun Nov 4 23:29:48 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 2007 UTC vs.
Revision 1.65 by root, Sun Nov 4 23:29:48 2007 UTC