[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 1.64 by root, Sun Nov 4 23:14:11 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	method_modify (EV_A_ fd, anfd->events, events);
		312	anfd->events = events;
		313	}
		314
		315	fdchangecnt = 0;
		316	}
		317
		318	static void
		319	fd_change (EV_P_ int fd)
		320	{
		321	if (anfds [fd].reify \|\| fdchangecnt < 0)
		322	return;
		323
		324	anfds [fd].reify = 1;
		325
		326	++fdchangecnt;
		327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		328	fdchanges [fdchangecnt - 1] = fd;
		329	}
		330
		331	static void
		332	fd_kill (EV_P_ int fd)
		333	{
		334	struct ev_io *w;
		335
		336	while ((w = (struct ev_io *)anfds [fd].head))
		337	{
		338	ev_io_stop (EV_A_ w);
		339	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		340	}
		341	}
		342
		343	/* called on EBADF to verify fds */
		344	static void
		345	fd_ebadf (EV_P)
		346	{
		347	int fd;
		348
		349	for (fd = 0; fd < anfdmax; ++fd)
		350	if (anfds [fd].events)
		351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		352	fd_kill (EV_A_ fd);
		353	}
		354
		355	/* called on ENOMEM in select/poll to kill some fds and retry */
		356	static void
		357	fd_enomem (EV_P)
		358	{
		359	int fd;
		360
		361	for (fd = anfdmax; fd--; )
		362	if (anfds [fd].events)
		363	{
		364	close (fd);
		365	fd_kill (EV_A_ fd);
		366	return;
		367	}
		368	}
		369
		370	/* susually called after fork if method needs to re-arm all fds from scratch */
		371	static void
		372	fd_rearm_all (EV_P)
		373	{
		374	int fd;
		375
		376	/* this should be highly optimised to not do anything but set a flag */
		377	for (fd = 0; fd < anfdmax; ++fd)
		378	if (anfds [fd].events)
		379	{
		380	anfds [fd].events = 0;
		381	fd_change (EV_A_ fd);
		382	}
171	}	383	}
172		384
173	/*****************************************************************************/	385	/*****************************************************************************/
174		386
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	387	static void
182	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
183	{	389	{
184	WT w = timers [k];	390	WT w = heap [k];
185		391
186	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
187	{	393	{
188	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
189	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
190	k >>= 1;	396	k >>= 1;
191	}	397	}
192		398
193	timers [k] = w;	399	heap [k] = w;
194	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
195		401
196	}	402	}
197		403
198	static void	404	static void
199	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
200	{	406	{
201	WT w = timers [k];	407	WT w = heap [k];
202		408
203	while (k < (N >> 1))	409	while (k < (N >> 1))
204	{	410	{
205	int j = k << 1;	411	int j = k << 1;
206		412
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208	++j;	414	++j;
209		415
210	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
211	break;	417	break;
212		418
213	timers [k] = timers [j];	419	heap [k] = heap [j];
214	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
215	k = j;	421	k = j;
216	}	422	}
217		423
218	timers [k] = w;	424	heap [k] = w;
219	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
220	}	426	}
221		427
222	/*****************************************************************************/	428	/*****************************************************************************/
223		429
224	typedef struct	430	typedef struct
225	{	431	{
226	struct ev_signal *head;	432	struct ev_watcher_list *head;
227	sig_atomic_t gotsig;	433	sig_atomic_t volatile gotsig;
228	} ANSIG;	434	} ANSIG;
229		435
230	static ANSIG *signals;	436	static ANSIG *signals;
231	static int signalmax;	437	static int signalmax;
232		438
233	static int sigpipe [2];	439	static int sigpipe [2];
234	static sig_atomic_t gotsig;	440	static sig_atomic_t volatile gotsig;
235	static struct ev_io sigev;	441	static struct ev_io sigev;
236		442
237	static void	443	static void
238	signals_init (ANSIG *base, int count)	444	signals_init (ANSIG *base, int count)
239	{	445	{
240	while (count--)	446	while (count--)
241	{	447	{
242	base->head = 0;	448	base->head = 0;
243	base->gotsig = 0;	449	base->gotsig = 0;
		450
244	++base;	451	++base;
245	}	452	}
246	}	453	}
247		454
248	static void	455	static void
250	{	457	{
251	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
252		459
253	if (!gotsig)	460	if (!gotsig)
254	{	461	{
		462	int old_errno = errno;
255	gotsig = 1;	463	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
257	}	466	}
258	}	467	}
259		468
260	static void	469	static void
261	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	471	{
263	struct ev_signal *w;	472	struct ev_watcher_list *w;
264	int sig;	473	int signum;
265		474
		475	read (sigpipe [0], &revents, 1);
266	gotsig = 0;	476	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		477
269	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
271	{	480	{
272	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
273		482
274	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
276	}	485	}
277	}	486	}
278		487
279	static void	488	static void
280	siginit (void)	489	siginit (EV_P)
281	{	490	{
		491	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		494
285	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
288		499
289	evio_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	503	}
292		504
293	/*****************************************************************************/	505	/*****************************************************************************/
294		506
295	static struct ev_idle **idles;	507	#ifndef WIN32
296	static int idlemax, idlecnt;
297		508
298	static struct ev_check **checks;	509	static struct ev_child *childs [PID_HASHSIZE];
299	static int checkmax, checkcnt;	510	static struct ev_signal childev;
		511
		512	#ifndef WCONTINUED
		513	# define WCONTINUED 0
		514	#endif
		515
		516	static void
		517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		518	{
		519	struct ev_child *w;
		520
		521	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		522	if (w->pid == pid \|\| !w->pid)
		523	{
		524	ev_priority (w) = ev_priority (sw); /* need to do it now */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
		534	int pid, status;
		535
		536	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		537	{
		538	/* make sure we are called again until all childs have been reaped */
		539	event (EV_A_ (W)sw, EV_SIGNAL);
		540
		541	child_reap (EV_A_ sw, pid, pid, status);
		542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
		544	}
		545
		546	#endif
300		547
301	/*****************************************************************************/	548	/*****************************************************************************/
302		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
303	#if HAVE_EPOLL	553	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	554	# include "ev_epoll.c"
305	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
306	#if HAVE_SELECT	559	#if EV_USE_SELECT
307	# include "ev_select.c"	560	# include "ev_select.c"
308	#endif	561	#endif
309		562
310	int ev_init (int flags)	563	int
		564	ev_version_major (void)
311	{	565	{
		566	return EV_VERSION_MAJOR;
		567	}
		568
		569	int
		570	ev_version_minor (void)
		571	{
		572	return EV_VERSION_MINOR;
		573	}
		574
		575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
		578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	\|\| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	static void
		594	loop_init (EV_P_ int methods)
		595	{
		596	if (!method)
		597	{
312	#if HAVE_MONOTONIC	598	#if EV_USE_MONOTONIC
313	{	599	{
314	struct timespec ts;	600	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	602	have_monotonic = 1;
317	}	603	}
318	#endif	604	#endif
319		605
320	ev_now = ev_time ();	606	rt_now = ev_time ();
321	now = get_clock ();	607	mn_now = get_clock ();
322	diff = ev_now - now;	608	now_floor = mn_now;
		609	rtmn_diff = rt_now - mn_now;
323		610
		611	if (methods == EVMETHOD_AUTO)
		612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
		615	methods = EVMETHOD_ANY;
		616
		617	method = 0;
		618	#if EV_USE_WIN32
		619	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		620	#endif
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_EPOLL
		625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_SELECT
		631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		632	#endif
		633	}
		634	}
		635
		636	void
		637	loop_destroy (EV_P)
		638	{
		639	#if EV_USE_WIN32
		640	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		647	#endif
		648	#if EV_USE_POLL
		649	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		653	#endif
		654
		655	method = 0;
		656	/TODO/
		657	}
		658
		659	void
		660	loop_fork (EV_P)
		661	{
		662	/TODO/
		663	#if EV_USE_EPOLL
		664	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		665	#endif
		666	#if EV_USE_KQUEUE
		667	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		668	#endif
		669	}
		670
		671	#if EV_MULTIPLICITY
		672	struct ev_loop *
		673	ev_loop_new (int methods)
		674	{
		675	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		676
		677	loop_init (EV_A_ methods);
		678
		679	if (ev_method (EV_A))
		680	return loop;
		681
		682	return 0;
		683	}
		684
		685	void
		686	ev_loop_destroy (EV_P)
		687	{
		688	loop_destroy (EV_A);
		689	free (loop);
		690	}
		691
		692	void
		693	ev_loop_fork (EV_P)
		694	{
		695	loop_fork (EV_A);
		696	}
		697
		698	#endif
		699
		700	#if EV_MULTIPLICITY
		701	struct ev_loop default_loop_struct;
		702	static struct ev_loop *default_loop;
		703
		704	struct ev_loop *
		705	#else
		706	static int default_loop;
		707
		708	int
		709	#endif
		710	ev_default_loop (int methods)
		711	{
		712	if (sigpipe [0] == sigpipe [1])
324	if (pipe (sigpipe))	713	if (pipe (sigpipe))
325	return 0;	714	return 0;
326		715
327	ev_method = EVMETHOD_NONE;	716	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	{	717	{
		718	#if EV_MULTIPLICITY
		719	struct ev_loop *loop = default_loop = &default_loop_struct;
		720	#else
		721	default_loop = 1;
		722	#endif
		723
		724	loop_init (EV_A_ methods);
		725
		726	if (ev_method (EV_A))
		727	{
337	evw_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
338	siginit ();	730	siginit (EV_A);
339	}
340		731
341	return ev_method;	732	#ifndef WIN32
342	}	733	ev_signal_init (&childev, childcb, SIGCHLD);
343		734	ev_set_priority (&childev, EV_MAXPRI);
344	/*****************************************************************************/	735	ev_signal_start (EV_A_ &childev);
345		736	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	737	#endif
		738	}
		739	else
		740	default_loop = 0;
		741	}
362		742
		743	return default_loop;
		744	}
		745
		746	void
		747	ev_default_destroy (void)
		748	{
		749	#if EV_MULTIPLICITY
		750	struct ev_loop *loop = default_loop;
		751	#endif
		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
363	evio_stop (&sigev);	757	ev_io_stop (EV_A_ &sigev);
		758
		759	close (sigpipe [0]); sigpipe [0] = 0;
		760	close (sigpipe [1]); sigpipe [1] = 0;
		761
		762	loop_destroy (EV_A);
		763	}
		764
		765	void
		766	ev_default_fork (void)
		767	{
		768	#if EV_MULTIPLICITY
		769	struct ev_loop *loop = default_loop;
		770	#endif
		771
		772	loop_fork (EV_A);
		773
		774	ev_io_stop (EV_A_ &sigev);
364	close (sigpipe [0]);	775	close (sigpipe [0]);
365	close (sigpipe [1]);	776	close (sigpipe [1]);
366	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
367	siginit ();	780	siginit (EV_A);
368	}	781	}
369		782
370	/*****************************************************************************/	783	/*****************************************************************************/
371		784
372	static void	785	static void
373	fd_reify (void)	786	call_pending (EV_P)
374	{	787	{
375	int i;	788	int pri;
376		789
377	for (i = 0; i < fdchangecnt; ++i)	790	for (pri = NUMPRI; pri--; )
378	{	791	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	{	792	{
390	method_modify (fd, anfd->wev, wev);	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391	anfd->wev = wev;
392	}
393	}
394		794
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)	795	if (p->w)
408	{	796	{
409	p->w->pending = 0;	797	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	798
		799	((void (*)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
411	}	800	}
412	}	801	}
413
414	pendingcnt = 0;
415	}	802	}
416		803
417	static void	804	static void
418	timers_reify ()	805	timers_reify (EV_P)
419	{	806	{
420	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
421	{	808	{
422	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
		810
		811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
423		812
424	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
425	if (w->repeat)	814	if (w->repeat)
426	{	815	{
		816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
430	}	819	}
431	else	820	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		822
434	event ((W)w, EV_TIMEOUT);	823	event (EV_A_ (W)w, EV_TIMEOUT);
435	}	824	}
436	}	825	}
437		826
438	static void	827	static void
439	periodics_reify ()	828	periodics_reify (EV_P)
440	{	829	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
442	{	831	{
443	struct ev_periodic *w = periodics [0];	832	struct ev_periodic *w = periodics [0];
		833
		834	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
444		835
445	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
446	if (w->interval)	837	if (w->interval)
447	{	838	{
448	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	839	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
449	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	840	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
450	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
451	}	842	}
452	else	843	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		845
455	event ((W)w, EV_TIMEOUT);	846	event (EV_A_ (W)w, EV_PERIODIC);
456	}	847	}
457	}	848	}
458		849
459	static void	850	static void
460	time_jump (ev_tstamp diff)	851	periodics_reschedule (EV_P)
461	{	852	{
462	int i;	853	int i;
463		854
464	/* adjust periodics */	855	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
466	{	857	{
467	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
468		859
469	if (w->interval)	860	if (w->interval)
470	{	861	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	862	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
472		863
473	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
474	{	865	{
475	evperiodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
476	evperiodic_start (w);	867	ev_periodic_start (EV_A_ w);
477		868
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	870	}
480	}	871	}
481	}	872	}
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	}	873	}
487		874
		875	inline int
		876	time_update_monotonic (EV_P)
		877	{
		878	mn_now = get_clock ();
		879
		880	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		881	{
		882	rt_now = rtmn_diff + mn_now;
		883	return 0;
		884	}
		885	else
		886	{
		887	now_floor = mn_now;
		888	rt_now = ev_time ();
		889	return 1;
		890	}
		891	}
		892
488	static void	893	static void
489	time_update ()	894	time_update (EV_P)
490	{	895	{
491	int i;	896	int i;
492		897
493	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	899	if (expect_true (have_monotonic))
496	{	900	{
497	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	902	{
501	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
502	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
503		908
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	910	return; /* all is well */
506		911
507	ev_now = ev_time ();	912	rt_now = ev_time ();
		913	mn_now = get_clock ();
		914	now_floor = mn_now;
		915	}
		916
		917	periodics_reschedule (EV_A);
		918	/* no timer adjustment, as the monotonic clock doesn't jump */
		919	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
508	}	920	}
509
510	time_jump (diff - odiff);
511	}	921	}
512	else	922	else
		923	#endif
513	{	924	{
514	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	925	rt_now = ev_time ();
515	time_jump (ev_now - now);
516		926
		927	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		928	{
		929	periodics_reschedule (EV_A);
		930
		931	/* adjust timers. this is easy, as the offset is the same for all */
		932	for (i = 0; i < timercnt; ++i)
		933	((WT)timers [i])->at += rt_now - mn_now;
		934	}
		935
517	now = ev_now;	936	mn_now = rt_now;
518	}	937	}
519	}	938	}
520		939
521	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
522		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
523	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
524	{	956	{
525	double block;	957	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	958	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		959
534	do	960	do
535	{	961	{
		962	/* queue check watchers (and execute them) */
		963	if (expect_false (preparecnt))
		964	{
		965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		966	call_pending (EV_A);
		967	}
		968
536	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
537	fd_reify ();	970	fd_reify (EV_A);
538		971
539	/* calculate blocking time */	972	/* calculate blocking time */
540		973
541	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	974	/* we only need this for !monotonic clockor timers, but as we basically
		975	always have timers, we just calculate it always */
		976	#if EV_USE_MONOTONIC
		977	if (expect_true (have_monotonic))
		978	time_update_monotonic (EV_A);
		979	else
		980	#endif
		981	{
542	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
543		985
544	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	986	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
545	block = 0.;	987	block = 0.;
546	else	988	else
547	{	989	{
548	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
549		991
550	if (timercnt)	992	if (timercnt)
551	{	993	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	994	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
553	if (block > to) block = to;	995	if (block > to) block = to;
554	}	996	}
555		997
556	if (periodiccnt)	998	if (periodiccnt)
557	{	999	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
559	if (block > to) block = to;	1001	if (block > to) block = to;
560	}	1002	}
561		1003
562	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
563	}	1005	}
564		1006
565	method_poll (block);	1007	method_poll (EV_A_ block);
566		1008
567	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
568	time_update ();	1010	time_update (EV_A);
569		1011
570	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
		1013	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	1014	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		1015
574	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	1017	if (!pendingcnt)
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		1019
578	/* queue check and possibly idle watchers */	1020	/* queue check watchers, to be executed first */
		1021	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		1023
581	call_pending ();	1024	call_pending (EV_A);
582	}	1025	}
583	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
		1027
		1028	if (loop_done != 2)
		1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
584	}	1036	}
585		1037
586	/*****************************************************************************/	1038	/*****************************************************************************/
587		1039
588	static void	1040	inline void
589	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
590	{	1042	{
591	elem->next = *head;	1043	elem->next = *head;
592	*head = elem;	1044	*head = elem;
593	}	1045	}
594		1046
595	static void	1047	inline void
596	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
597	{	1049	{
598	while (*head)	1050	while (*head)
599	{	1051	{
600	if (*head == elem)	1052	if (*head == elem)
…		…
605		1057
606	head = &(*head)->next;	1058	head = &(*head)->next;
607	}	1059	}
608	}	1060	}
609		1061
610	static void	1062	inline void
		1063	ev_clear_pending (EV_P_ W w)
		1064	{
		1065	if (w->pending)
		1066	{
		1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1068	w->pending = 0;
		1069	}
		1070	}
		1071
		1072	inline void
611	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
612	{	1074	{
613	w->pending = 0;	1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
614	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
615	}	1080	}
616		1081
617	static void	1082	inline void
618	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
619	{	1084	{
620	if (w->pending)	1085	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1086	w->active = 0;
624	}	1087	}
625		1088
626	/*****************************************************************************/	1089	/*****************************************************************************/
627		1090
628	void	1091	void
629	evio_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
630	{	1093	{
		1094	int fd = w->fd;
		1095
631	if (ev_is_active (w))	1096	if (ev_is_active (w))
632	return;	1097	return;
633		1098
634	int fd = w->fd;	1099	assert (("ev_io_start called with negative fd", fd >= 0));
635		1100
636	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		1104
640	++fdchangecnt;	1105	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	1106	}
644		1107
645	void	1108	void
646	evio_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
647	{	1110	{
		1111	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
649	return;	1113	return;
650		1114
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
653		1117
654	++fdchangecnt;	1118	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1119	}
658		1120
659
660	void	1121	void
661	evtimer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1123	{
663	if (ev_is_active (w))	1124	if (ev_is_active (w))
664	return;	1125	return;
665		1126
666	w->at += now;	1127	((WT)w)->at += mn_now;
667		1128
		1129	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1130
668	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
672	}
673		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
674	void	1139	void
675	evtimer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1141	{
		1142	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
678	return;	1144	return;
679		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
680	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
681	{	1149	{
682	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
684	}	1152	}
685		1153
		1154	((WT)w)->at = w->repeat;
		1155
686	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
687	}	1157	}
688		1158
689	void	1159	void
690	evperiodic_start (struct ev_periodic *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1161	{
692	if (ev_is_active (w))	1162	if (ev_is_active (w))
		1163	{
		1164	if (w->repeat)
		1165	{
		1166	((WT)w)->at = mn_now + w->repeat;
		1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1168	}
		1169	else
		1170	ev_timer_stop (EV_A_ w);
		1171	}
		1172	else if (w->repeat)
		1173	ev_timer_start (EV_A_ w);
		1174	}
		1175
		1176	void
		1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1178	{
		1179	if (ev_is_active (w))
693	return;	1180	return;
		1181
		1182	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694		1183
695	/* this formula differs from the one in periodic_reify because we do not always round up */	1184	/* this formula differs from the one in periodic_reify because we do not always round up */
696	if (w->interval)	1185	if (w->interval)
697	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1186	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
698		1187
699	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
701	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
703	}
704		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
705	void	1196	void
706	evperiodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1198	{
		1199	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
709	return;	1201	return;
710		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
711	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
712	{	1206	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
715	}	1209	}
716		1210
717	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
718	}	1212	}
719		1213
720	void	1214	void
721	evsignal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
722	{	1216	{
723	if (ev_is_active (w))	1217	if (ev_is_active (w))
724	return;	1218	return;
725		1219
		1220	ev_start (EV_A_ (W)w, ++idlecnt);
		1221	array_needsize (idles, idlemax, idlecnt, );
		1222	idles [idlecnt - 1] = w;
		1223	}
		1224
		1225	void
		1226	ev_idle_stop (EV_P_ struct ev_idle *w)
		1227	{
		1228	ev_clear_pending (EV_A_ (W)w);
		1229	if (ev_is_active (w))
		1230	return;
		1231
		1232	idles [((W)w)->active - 1] = idles [--idlecnt];
		1233	ev_stop (EV_A_ (W)w);
		1234	}
		1235
		1236	void
		1237	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1238	{
		1239	if (ev_is_active (w))
		1240	return;
		1241
		1242	ev_start (EV_A_ (W)w, ++preparecnt);
		1243	array_needsize (prepares, preparemax, preparecnt, );
		1244	prepares [preparecnt - 1] = w;
		1245	}
		1246
		1247	void
		1248	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1249	{
		1250	ev_clear_pending (EV_A_ (W)w);
		1251	if (ev_is_active (w))
		1252	return;
		1253
		1254	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1255	ev_stop (EV_A_ (W)w);
		1256	}
		1257
		1258	void
		1259	ev_check_start (EV_P_ struct ev_check *w)
		1260	{
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	ev_start (EV_A_ (W)w, ++checkcnt);
		1265	array_needsize (checks, checkmax, checkcnt, );
		1266	checks [checkcnt - 1] = w;
		1267	}
		1268
		1269	void
		1270	ev_check_stop (EV_P_ struct ev_check *w)
		1271	{
		1272	ev_clear_pending (EV_A_ (W)w);
		1273	if (ev_is_active (w))
		1274	return;
		1275
		1276	checks [((W)w)->active - 1] = checks [--checkcnt];
		1277	ev_stop (EV_A_ (W)w);
		1278	}
		1279
		1280	#ifndef SA_RESTART
		1281	# define SA_RESTART 0
		1282	#endif
		1283
		1284	void
		1285	ev_signal_start (EV_P_ struct ev_signal *w)
		1286	{
		1287	#if EV_MULTIPLICITY
		1288	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1289	#endif
		1290	if (ev_is_active (w))
		1291	return;
		1292
		1293	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1294
726	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1298
730	if (!w->next)	1299	if (!((WL)w)->next)
731	{	1300	{
732	struct sigaction sa;	1301	struct sigaction sa;
733	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
737	}	1306	}
738	}	1307	}
739		1308
740	void	1309	void
741	evsignal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1311	{
		1312	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
744	return;	1314	return;
745		1315
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
748		1318
749	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
751	}	1321	}
752		1322
753	void evidle_start (struct ev_idle *w)	1323	void
		1324	ev_child_start (EV_P_ struct ev_child *w)
754	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
755	if (ev_is_active (w))	1329	if (ev_is_active (w))
756	return;	1330	return;
757		1331
758	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	1334	}
762		1335
763	void evidle_stop (struct ev_idle *w)	1336	void
		1337	ev_child_stop (EV_P_ struct ev_child *w)
764	{	1338	{
765	idles [w->active - 1] = idles [--idlecnt];	1339	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))	1340	if (ev_is_active (w))
772	return;	1341	return;
773		1342
774	ev_start ((W)w, ++checkcnt);	1343	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);	1344	ev_stop (EV_A_ (W)w);
783	}	1345	}
784		1346
785	/*****************************************************************************/	1347	/*****************************************************************************/
786		1348
787	#if 1	1349	struct ev_once
788		1350	{
789	struct ev_io wio;	1351	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;	1352	struct ev_timer to;
843	evtimer_init (&t1, ocb, 5, 10);	1353	void (cb)(int revents, void arg);
844	evtimer_start (&t1);	1354	void *arg;
		1355	};
845		1356
846	struct ev_signal sig;	1357	static void
847	evsignal_init (&sig, scb, SIGQUIT);	1358	once_cb (EV_P_ struct ev_once *once, int revents)
848	evsignal_start (&sig);	1359	{
		1360	void (cb)(int revents, void arg) = once->cb;
		1361	void *arg = once->arg;
849		1362
850	struct ev_check cw;	1363	ev_io_stop (EV_A_ &once->io);
851	evcheck_init (&cw, gcb);	1364	ev_timer_stop (EV_A_ &once->to);
852	evcheck_start (&cw);	1365	free (once);
853		1366
854	struct ev_idle iw;	1367	cb (revents, arg);
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;
861	}	1368	}
862		1369
863	#endif	1370	static void
		1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1372	{
		1373	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1374	}
864		1375
		1376	static void
		1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1378	{
		1379	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1380	}
865		1381
		1382	void
		1383	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1384	{
		1385	struct ev_once *once = malloc (sizeof (struct ev_once));
866		1386
		1387	if (!once)
		1388	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1389	else
		1390	{
		1391	once->cb = cb;
		1392	once->arg = arg;
867		1393
		1394	ev_watcher_init (&once->io, once_cb_io);
		1395	if (fd >= 0)
		1396	{
		1397	ev_io_set (&once->io, fd, events);
		1398	ev_io_start (EV_A_ &once->io);
		1399	}
		1400
		1401	ev_watcher_init (&once->to, once_cb_to);
		1402	if (timeout >= 0.)
		1403	{
		1404	ev_timer_set (&once->to, timeout, 0.);
		1405	ev_timer_start (EV_A_ &once->to);
		1406	}
		1407	}
		1408	}
		1409

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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 1.64 by root, Sun Nov 4 23:14:11 2007 UTC

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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 1.64 by root, Sun Nov 4 23:14:11 2007 UTC