[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 1.59 by root, Sun Nov 4 18:15:16 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	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
3	#include <unistd.h>	37	#include <unistd.h>
4	#include <fcntl.h>	38	#include <fcntl.h>
5	#include <signal.h>	39	#include <signal.h>
		40	#include <stddef.h>
6		41
7	#include <stdio.h>	42	#include <stdio.h>
8		43
9	#include <assert.h>	44	#include <assert.h>
10	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
11	#include <sys/time.h>	50	#include <sys/time.h>
12	#include <time.h>	51	#include <time.h>
13		52
14	#define HAVE_EPOLL 1	53	/**/
15		54
16	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USE_POLL
		64	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
17	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
18	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
19	# endif	84	#endif
20	#endif
21		85
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	86	#ifndef CLOCK_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
32	#endif	89	#endif
		90
		91	/**/
33		92
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
36		97
37	#include "ev.h"	98	#include "ev.h"
38		99
39	struct ev_watcher {	100	#if __GNUC__ >= 3
40	EV_WATCHER (ev_watcher);	101	# define expect(expr,value) __builtin_expect ((expr),(value))
41	};	102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
42		107
43	struct ev_watcher_list {	108	#define expect_false(expr) expect ((expr) != 0, 0)
44	EV_WATCHER_LIST (ev_watcher_list);	109	#define expect_true(expr) expect ((expr) != 0, 1)
45	};
46		110
47	struct ev_watcher_time {	111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48	EV_WATCHER_TIME (ev_watcher_time);	112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49	};
50		113
51	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
52	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
53	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
54		117
55	static ev_tstamp now, diff; /* monotonic clock */	118	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		119
65	/*****************************************************************************/	120	/*****************************************************************************/
66		121
67	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
68	ev_time (void)	156	ev_time (void)
69	{	157	{
70	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
71	struct timespec ts;	159	struct timespec ts;
72	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
73	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
74	#else	162	#else
75	struct timeval tv;	163	struct timeval tv;
76	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
77	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
78	#endif	166	#endif
79	}	167	}
80		168
81	static ev_tstamp	169	inline ev_tstamp
82	get_clock (void)	170	get_clock (void)
83	{	171	{
84	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
85	if (have_monotonic)	173	if (expect_true (have_monotonic))
86	{	174	{
87	struct timespec ts;	175	struct timespec ts;
88	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	}	178	}
91	#endif	179	#endif
92		180
93	return ev_time ();	181	return ev_time ();
94	}	182	}
95		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		191
96	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
97	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
98	{ \	194	{ \
99	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
100	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
101	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
102	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
103	cur = newcnt; \	204	cur = newcnt; \
104	}	205	}
105		206
106	/*****************************************************************************/	207	/*****************************************************************************/
107		208
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	209	static void
121	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
122	{	211	{
123	while (count--)	212	while (count--)
124	{	213	{
125	base->head = 0;	214	base->head = 0;
126	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
127	++base;	218	++base;
128	}	219	}
129	}	220	}
130		221
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	222	static void
141	event (W w, int events)	223	event (EV_P_ W w, int events)
142	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
		229	}
		230
143	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
144	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
145	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
146	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
147	}	235	}
148		236
149	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
150	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
151	{	248	{
152	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
153	struct ev_io *w;	250	struct ev_io *w;
154		251
155	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
156	{	253	{
157	int ev = w->events & events;	254	int ev = w->events & events;
158		255
159	if (ev)	256	if (ev)
160	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
161	}	258	}
162	}	259	}
163		260
		261	/*****************************************************************************/
		262
164	static void	263	static void
165	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
166	{	265	{
167	int i;	266	int i;
168		267
169	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
170	event (events [i], type);	269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		277	events \|= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify \|\| fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		313	}
		314	}
		315
		316	/* called on EBADF to verify fds */
		317	static void
		318	fd_ebadf (EV_P)
		319	{
		320	int fd;
		321
		322	for (fd = 0; fd < anfdmax; ++fd)
		323	if (anfds [fd].events)
		324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
		340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
171	}	356	}
172		357
173	/*****************************************************************************/	358	/*****************************************************************************/
174		359
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	360	static void
182	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
183	{	362	{
184	WT w = timers [k];	363	WT w = heap [k];
185		364
186	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
187	{	366	{
188	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
189	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
190	k >>= 1;	369	k >>= 1;
191	}	370	}
192		371
193	timers [k] = w;	372	heap [k] = w;
194	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
195		374
196	}	375	}
197		376
198	static void	377	static void
199	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
200	{	379	{
201	WT w = timers [k];	380	WT w = heap [k];
202		381
203	while (k < (N >> 1))	382	while (k < (N >> 1))
204	{	383	{
205	int j = k << 1;	384	int j = k << 1;
206		385
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208	++j;	387	++j;
209		388
210	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
211	break;	390	break;
212		391
213	timers [k] = timers [j];	392	heap [k] = heap [j];
214	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
215	k = j;	394	k = j;
216	}	395	}
217		396
218	timers [k] = w;	397	heap [k] = w;
219	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
220	}	399	}
221		400
222	/*****************************************************************************/	401	/*****************************************************************************/
223		402
224	typedef struct	403	typedef struct
225	{	404	{
226	struct ev_signal *head;	405	struct ev_watcher_list *head;
227	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
228	} ANSIG;	407	} ANSIG;
229		408
230	static ANSIG *signals;	409	static ANSIG *signals;
231	static int signalmax;	410	static int signalmax;
232		411
233	static int sigpipe [2];	412	static int sigpipe [2];
234	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
235	static struct ev_io sigev;	414	static struct ev_io sigev;
236		415
237	static void	416	static void
238	signals_init (ANSIG *base, int count)	417	signals_init (ANSIG *base, int count)
239	{	418	{
240	while (count--)	419	while (count--)
241	{	420	{
242	base->head = 0;	421	base->head = 0;
243	base->gotsig = 0;	422	base->gotsig = 0;
		423
244	++base;	424	++base;
245	}	425	}
246	}	426	}
247		427
248	static void	428	static void
250	{	430	{
251	signals [signum - 1].gotsig = 1;	431	signals [signum - 1].gotsig = 1;
252		432
253	if (!gotsig)	433	if (!gotsig)
254	{	434	{
		435	int old_errno = errno;
255	gotsig = 1;	436	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	437	write (sigpipe [1], &signum, 1);
		438	errno = old_errno;
257	}	439	}
258	}	440	}
259		441
260	static void	442	static void
261	sigcb (struct ev_io *iow, int revents)	443	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	444	{
263	struct ev_signal *w;	445	struct ev_watcher_list *w;
264	int sig;	446	int signum;
265		447
		448	read (sigpipe [0], &revents, 1);
266	gotsig = 0;	449	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		450
269	for (sig = signalmax; sig--; )	451	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	452	if (signals [signum].gotsig)
271	{	453	{
272	signals [sig].gotsig = 0;	454	signals [signum].gotsig = 0;
273		455
274	for (w = signals [sig].head; w; w = w->next)	456	for (w = signals [signum].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);	457	event (EV_A_ (W)w, EV_SIGNAL);
276	}	458	}
277	}	459	}
278		460
279	static void	461	static void
280	siginit (void)	462	siginit (EV_P)
281	{	463	{
		464	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		467
285	/* rather than sort out wether we really need nb, set it */	468	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		471	#endif
288		472
289	evio_set (&sigev, sigpipe [0], EV_READ);	473	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	474	ev_io_start (EV_A_ &sigev);
		475	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	476	}
292		477
293	/*****************************************************************************/	478	/*****************************************************************************/
294		479
295	static struct ev_idle **idles;	480	#ifndef WIN32
296	static int idlemax, idlecnt;
297		481
298	static struct ev_check **checks;	482	static struct ev_child *childs [PID_HASHSIZE];
299	static int checkmax, checkcnt;	483	static struct ev_signal childev;
		484
		485	#ifndef WCONTINUED
		486	# define WCONTINUED 0
		487	#endif
		488
		489	static void
		490	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		491	{
		492	struct ev_child *w;
		493
		494	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		495	if (w->pid == pid \|\| !w->pid)
		496	{
		497	w->priority = sw->priority; /* need to do it now */
		498	w->rpid = pid;
		499	w->rstatus = status;
		500	event (EV_A_ (W)w, EV_CHILD);
		501	}
		502	}
		503
		504	static void
		505	childcb (EV_P_ struct ev_signal *sw, int revents)
		506	{
		507	int pid, status;
		508
		509	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		510	{
		511	/* make sure we are called again until all childs have been reaped */
		512	event (EV_A_ (W)sw, EV_SIGNAL);
		513
		514	child_reap (EV_A_ sw, pid, pid, status);
		515	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		516	}
		517	}
		518
		519	#endif
300		520
301	/*****************************************************************************/	521	/*****************************************************************************/
302		522
		523	#if EV_USE_KQUEUE
		524	# include "ev_kqueue.c"
		525	#endif
303	#if HAVE_EPOLL	526	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	527	# include "ev_epoll.c"
305	#endif	528	#endif
		529	#if EV_USE_POLL
		530	# include "ev_poll.c"
		531	#endif
306	#if HAVE_SELECT	532	#if EV_USE_SELECT
307	# include "ev_select.c"	533	# include "ev_select.c"
308	#endif	534	#endif
309		535
310	int ev_init (int flags)	536	int
		537	ev_version_major (void)
311	{	538	{
		539	return EV_VERSION_MAJOR;
		540	}
		541
		542	int
		543	ev_version_minor (void)
		544	{
		545	return EV_VERSION_MINOR;
		546	}
		547
		548	/* return true if we are running with elevated privileges and should ignore env variables */
		549	static int
		550	enable_secure (void)
		551	{
		552	#ifdef WIN32
		553	return 0;
		554	#else
		555	return getuid () != geteuid ()
		556	\|\| getgid () != getegid ();
		557	#endif
		558	}
		559
		560	int
		561	ev_method (EV_P)
		562	{
		563	return method;
		564	}
		565
		566	static void
		567	loop_init (EV_P_ int methods)
		568	{
		569	if (!method)
		570	{
312	#if HAVE_MONOTONIC	571	#if EV_USE_MONOTONIC
313	{	572	{
314	struct timespec ts;	573	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	575	have_monotonic = 1;
317	}	576	}
318	#endif	577	#endif
319		578
320	ev_now = ev_time ();	579	rt_now = ev_time ();
321	now = get_clock ();	580	mn_now = get_clock ();
322	diff = ev_now - now;	581	now_floor = mn_now;
		582	rtmn_diff = rt_now - mn_now;
323		583
		584	if (methods == EVMETHOD_AUTO)
		585	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		586	methods = atoi (getenv ("LIBEV_METHODS"));
		587	else
		588	methods = EVMETHOD_ANY;
		589
		590	method = 0;
		591	#if EV_USE_KQUEUE
		592	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		593	#endif
		594	#if EV_USE_EPOLL
		595	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		596	#endif
		597	#if EV_USE_POLL
		598	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		599	#endif
		600	#if EV_USE_SELECT
		601	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		602	#endif
		603	}
		604	}
		605
		606	void
		607	loop_destroy (EV_P)
		608	{
		609	#if EV_USE_KQUEUE
		610	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		611	#endif
		612	#if EV_USE_EPOLL
		613	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		614	#endif
		615	#if EV_USE_POLL
		616	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		617	#endif
		618	#if EV_USE_SELECT
		619	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		620	#endif
		621
		622	method = 0;
		623	/TODO/
		624	}
		625
		626	void
		627	loop_fork (EV_P)
		628	{
		629	/TODO/
		630	#if EV_USE_EPOLL
		631	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		632	#endif
		633	#if EV_USE_KQUEUE
		634	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		635	#endif
		636	}
		637
		638	#if EV_MULTIPLICITY
		639	struct ev_loop *
		640	ev_loop_new (int methods)
		641	{
		642	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		643
		644	loop_init (EV_A_ methods);
		645
		646	if (ev_methods (EV_A))
		647	return loop;
		648
		649	return 0;
		650	}
		651
		652	void
		653	ev_loop_destroy (EV_P)
		654	{
		655	loop_destroy (EV_A);
		656	free (loop);
		657	}
		658
		659	void
		660	ev_loop_fork (EV_P)
		661	{
		662	loop_fork (EV_A);
		663	}
		664
		665	#endif
		666
		667	#if EV_MULTIPLICITY
		668	struct ev_loop default_loop_struct;
		669	static struct ev_loop *default_loop;
		670
		671	struct ev_loop *
		672	#else
		673	static int default_loop;
		674
		675	int
		676	#endif
		677	ev_default_loop (int methods)
		678	{
		679	if (sigpipe [0] == sigpipe [1])
324	if (pipe (sigpipe))	680	if (pipe (sigpipe))
325	return 0;	681	return 0;
326		682
327	ev_method = EVMETHOD_NONE;	683	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	{	684	{
		685	#if EV_MULTIPLICITY
		686	struct ev_loop *loop = default_loop = &default_loop_struct;
		687	#else
		688	default_loop = 1;
		689	#endif
		690
		691	loop_init (EV_A_ methods);
		692
		693	if (ev_method (EV_A))
		694	{
337	evw_init (&sigev, sigcb);	695	ev_watcher_init (&sigev, sigcb);
		696	ev_set_priority (&sigev, EV_MAXPRI);
338	siginit ();	697	siginit (EV_A);
339	}
340		698
341	return ev_method;	699	#ifndef WIN32
342	}	700	ev_signal_init (&childev, childcb, SIGCHLD);
343		701	ev_set_priority (&childev, EV_MAXPRI);
344	/*****************************************************************************/	702	ev_signal_start (EV_A_ &childev);
345		703	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	704	#endif
		705	}
		706	else
		707	default_loop = 0;
		708	}
362		709
		710	return default_loop;
		711	}
		712
		713	void
		714	ev_default_destroy (void)
		715	{
		716	#if EV_MULTIPLICITY
		717	struct ev_loop *loop = default_loop;
		718	#endif
		719
		720	ev_ref (EV_A); /* child watcher */
		721	ev_signal_stop (EV_A_ &childev);
		722
		723	ev_ref (EV_A); /* signal watcher */
363	evio_stop (&sigev);	724	ev_io_stop (EV_A_ &sigev);
		725
		726	close (sigpipe [0]); sigpipe [0] = 0;
		727	close (sigpipe [1]); sigpipe [1] = 0;
		728
		729	loop_destroy (EV_A);
		730	}
		731
		732	void
		733	ev_default_fork (EV_P)
		734	{
		735	loop_fork (EV_A);
		736
		737	ev_io_stop (EV_A_ &sigev);
364	close (sigpipe [0]);	738	close (sigpipe [0]);
365	close (sigpipe [1]);	739	close (sigpipe [1]);
366	pipe (sigpipe);	740	pipe (sigpipe);
		741
		742	ev_ref (EV_A); /* signal watcher */
367	siginit ();	743	siginit (EV_A);
368	}	744	}
369		745
370	/*****************************************************************************/	746	/*****************************************************************************/
371		747
372	static void	748	static void
373	fd_reify (void)	749	call_pending (EV_P)
374	{	750	{
375	int i;	751	int pri;
376		752
377	for (i = 0; i < fdchangecnt; ++i)	753	for (pri = NUMPRI; pri--; )
378	{	754	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	{	755	{
390	method_modify (fd, anfd->wev, wev);	756	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391	anfd->wev = wev;
392	}
393	}
394		757
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)	758	if (p->w)
408	{	759	{
409	p->w->pending = 0;	760	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	761	p->w->cb (EV_A_ p->w, p->events);
411	}	762	}
412	}	763	}
413
414	pendingcnt = 0;
415	}	764	}
416		765
417	static void	766	static void
418	timers_reify ()	767	timers_reify (EV_P)
419	{	768	{
420	while (timercnt && timers [0]->at <= now)	769	while (timercnt && timers [0]->at <= mn_now)
421	{	770	{
422	struct ev_timer *w = timers [0];	771	struct ev_timer *w = timers [0];
423		772
424	/* first reschedule or stop timer */	773	/* first reschedule or stop timer */
425	if (w->repeat)	774	if (w->repeat)
426	{	775	{
		776	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	777	w->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	778	downheap ((WT *)timers, timercnt, 0);
430	}	779	}
431	else	780	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	781	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		782
434	event ((W)w, EV_TIMEOUT);	783	event (EV_A_ (W)w, EV_TIMEOUT);
435	}	784	}
436	}	785	}
437		786
438	static void	787	static void
439	periodics_reify ()	788	periodics_reify (EV_P)
440	{	789	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	790	while (periodiccnt && periodics [0]->at <= rt_now)
442	{	791	{
443	struct ev_periodic *w = periodics [0];	792	struct ev_periodic *w = periodics [0];
444		793
445	/* first reschedule or stop timer */	794	/* first reschedule or stop timer */
446	if (w->interval)	795	if (w->interval)
447	{	796	{
448	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	797	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
449	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	798	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
450	downheap ((WT *)periodics, periodiccnt, 0);	799	downheap ((WT *)periodics, periodiccnt, 0);
451	}	800	}
452	else	801	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	802	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		803
455	event ((W)w, EV_TIMEOUT);	804	event (EV_A_ (W)w, EV_PERIODIC);
456	}	805	}
457	}	806	}
458		807
459	static void	808	static void
460	time_jump (ev_tstamp diff)	809	periodics_reschedule (EV_P)
461	{	810	{
462	int i;	811	int i;
463		812
464	/* adjust periodics */	813	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	814	for (i = 0; i < periodiccnt; ++i)
466	{	815	{
467	struct ev_periodic *w = periodics [i];	816	struct ev_periodic *w = periodics [i];
468		817
469	if (w->interval)	818	if (w->interval)
470	{	819	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	820	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
472		821
473	if (fabs (diff) >= 1e-4)	822	if (fabs (diff) >= 1e-4)
474	{	823	{
475	evperiodic_stop (w);	824	ev_periodic_stop (EV_A_ w);
476	evperiodic_start (w);	825	ev_periodic_start (EV_A_ w);
477		826
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */	827	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	828	}
480	}	829	}
481	}	830	}
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	}	831	}
487		832
		833	inline int
		834	time_update_monotonic (EV_P)
		835	{
		836	mn_now = get_clock ();
		837
		838	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		839	{
		840	rt_now = rtmn_diff + mn_now;
		841	return 0;
		842	}
		843	else
		844	{
		845	now_floor = mn_now;
		846	rt_now = ev_time ();
		847	return 1;
		848	}
		849	}
		850
488	static void	851	static void
489	time_update ()	852	time_update (EV_P)
490	{	853	{
491	int i;	854	int i;
492		855
493	ev_now = ev_time ();	856	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	857	if (expect_true (have_monotonic))
496	{	858	{
497	ev_tstamp odiff = diff;	859	if (time_update_monotonic (EV_A))
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	860	{
501	now = get_clock ();	861	ev_tstamp odiff = rtmn_diff;
		862
		863	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		864	{
502	diff = ev_now - now;	865	rtmn_diff = rt_now - mn_now;
503		866
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	867	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	868	return; /* all is well */
506		869
507	ev_now = ev_time ();	870	rt_now = ev_time ();
		871	mn_now = get_clock ();
		872	now_floor = mn_now;
		873	}
		874
		875	periodics_reschedule (EV_A);
		876	/* no timer adjustment, as the monotonic clock doesn't jump */
		877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
508	}	878	}
509
510	time_jump (diff - odiff);
511	}	879	}
512	else	880	else
		881	#endif
513	{	882	{
514	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	883	rt_now = ev_time ();
515	time_jump (ev_now - now);
516		884
		885	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		886	{
		887	periodics_reschedule (EV_A);
		888
		889	/* adjust timers. this is easy, as the offset is the same for all */
		890	for (i = 0; i < timercnt; ++i)
		891	timers [i]->at += rt_now - mn_now;
		892	}
		893
517	now = ev_now;	894	mn_now = rt_now;
518	}	895	}
519	}	896	}
520		897
521	int ev_loop_done;	898	void
		899	ev_ref (EV_P)
		900	{
		901	++activecnt;
		902	}
522		903
		904	void
		905	ev_unref (EV_P)
		906	{
		907	--activecnt;
		908	}
		909
		910	static int loop_done;
		911
		912	void
523	void ev_loop (int flags)	913	ev_loop (EV_P_ int flags)
524	{	914	{
525	double block;	915	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	916	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		917
534	do	918	do
535	{	919	{
		920	/* queue check watchers (and execute them) */
		921	if (expect_false (preparecnt))
		922	{
		923	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		924	call_pending (EV_A);
		925	}
		926
536	/* update fd-related kernel structures */	927	/* update fd-related kernel structures */
537	fd_reify ();	928	fd_reify (EV_A);
538		929
539	/* calculate blocking time */	930	/* calculate blocking time */
540		931
541	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	932	/* we only need this for !monotonic clockor timers, but as we basically
		933	always have timers, we just calculate it always */
		934	#if EV_USE_MONOTONIC
		935	if (expect_true (have_monotonic))
		936	time_update_monotonic (EV_A);
		937	else
		938	#endif
		939	{
542	ev_now = ev_time ();	940	rt_now = ev_time ();
		941	mn_now = rt_now;
		942	}
543		943
544	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	944	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
545	block = 0.;	945	block = 0.;
546	else	946	else
547	{	947	{
548	block = MAX_BLOCKTIME;	948	block = MAX_BLOCKTIME;
549		949
550	if (timercnt)	950	if (timercnt)
551	{	951	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	952	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
553	if (block > to) block = to;	953	if (block > to) block = to;
554	}	954	}
555		955
556	if (periodiccnt)	956	if (periodiccnt)
557	{	957	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	958	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
559	if (block > to) block = to;	959	if (block > to) block = to;
560	}	960	}
561		961
562	if (block < 0.) block = 0.;	962	if (block < 0.) block = 0.;
563	}	963	}
564		964
565	method_poll (block);	965	method_poll (EV_A_ block);
566		966
567	/* update ev_now, do magic */	967	/* update rt_now, do magic */
568	time_update ();	968	time_update (EV_A);
569		969
570	/* queue pending timers and reschedule them */	970	/* queue pending timers and reschedule them */
		971	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	972	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		973
574	/* queue idle watchers unless io or timers are pending */	974	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	975	if (!pendingcnt)
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	976	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		977
578	/* queue check and possibly idle watchers */	978	/* queue check watchers, to be executed first */
		979	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	980	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		981
581	call_pending ();	982	call_pending (EV_A);
582	}	983	}
583	while (!ev_loop_done);	984	while (activecnt && !loop_done);
		985
		986	if (loop_done != 2)
		987	loop_done = 0;
		988	}
		989
		990	void
		991	ev_unloop (EV_P_ int how)
		992	{
		993	loop_done = how;
584	}	994	}
585		995
586	/*****************************************************************************/	996	/*****************************************************************************/
587		997
588	static void	998	inline void
589	wlist_add (WL *head, WL elem)	999	wlist_add (WL *head, WL elem)
590	{	1000	{
591	elem->next = *head;	1001	elem->next = *head;
592	*head = elem;	1002	*head = elem;
593	}	1003	}
594		1004
595	static void	1005	inline void
596	wlist_del (WL *head, WL elem)	1006	wlist_del (WL *head, WL elem)
597	{	1007	{
598	while (*head)	1008	while (*head)
599	{	1009	{
600	if (*head == elem)	1010	if (*head == elem)
…		…
605		1015
606	head = &(*head)->next;	1016	head = &(*head)->next;
607	}	1017	}
608	}	1018	}
609		1019
610	static void	1020	inline void
		1021	ev_clear_pending (EV_P_ W w)
		1022	{
		1023	if (w->pending)
		1024	{
		1025	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1026	w->pending = 0;
		1027	}
		1028	}
		1029
		1030	inline void
611	ev_start (W w, int active)	1031	ev_start (EV_P_ W w, int active)
612	{	1032	{
613	w->pending = 0;	1033	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1034	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1035
614	w->active = active;	1036	w->active = active;
		1037	ev_ref (EV_A);
615	}	1038	}
616		1039
617	static void	1040	inline void
618	ev_stop (W w)	1041	ev_stop (EV_P_ W w)
619	{	1042	{
620	if (w->pending)	1043	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1044	w->active = 0;
624	}	1045	}
625		1046
626	/*****************************************************************************/	1047	/*****************************************************************************/
627		1048
628	void	1049	void
629	evio_start (struct ev_io *w)	1050	ev_io_start (EV_P_ struct ev_io *w)
630	{	1051	{
		1052	int fd = w->fd;
		1053
631	if (ev_is_active (w))	1054	if (ev_is_active (w))
632	return;	1055	return;
633		1056
634	int fd = w->fd;	1057	assert (("ev_io_start called with negative fd", fd >= 0));
635		1058
636	ev_start ((W)w, 1);	1059	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1060	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1061	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		1062
640	++fdchangecnt;	1063	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	1064	}
644		1065
645	void	1066	void
646	evio_stop (struct ev_io *w)	1067	ev_io_stop (EV_P_ struct ev_io *w)
647	{	1068	{
		1069	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	1070	if (!ev_is_active (w))
649	return;	1071	return;
650		1072
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1073	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	1074	ev_stop (EV_A_ (W)w);
653		1075
654	++fdchangecnt;	1076	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1077	}
658		1078
659
660	void	1079	void
661	evtimer_start (struct ev_timer *w)	1080	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1081	{
663	if (ev_is_active (w))	1082	if (ev_is_active (w))
664	return;	1083	return;
665		1084
666	w->at += now;	1085	w->at += mn_now;
667		1086
		1087	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1088
668	ev_start ((W)w, ++timercnt);	1089	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1090	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;	1091	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1092	upheap ((WT *)timers, timercnt - 1);
672	}	1093	}
673		1094
674	void	1095	void
675	evtimer_stop (struct ev_timer *w)	1096	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1097	{
		1098	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1099	if (!ev_is_active (w))
678	return;	1100	return;
679		1101
680	if (w->active < timercnt--)	1102	if (w->active < timercnt--)
681	{	1103	{
682	timers [w->active - 1] = timers [timercnt];	1104	timers [w->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1105	downheap ((WT *)timers, timercnt, w->active - 1);
684	}	1106	}
685		1107
		1108	w->at = w->repeat;
		1109
686	ev_stop ((W)w);	1110	ev_stop (EV_A_ (W)w);
687	}	1111	}
688		1112
689	void	1113	void
690	evperiodic_start (struct ev_periodic *w)	1114	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1115	{
692	if (ev_is_active (w))	1116	if (ev_is_active (w))
		1117	{
		1118	if (w->repeat)
		1119	{
		1120	w->at = mn_now + w->repeat;
		1121	downheap ((WT *)timers, timercnt, w->active - 1);
		1122	}
		1123	else
		1124	ev_timer_stop (EV_A_ w);
		1125	}
		1126	else if (w->repeat)
		1127	ev_timer_start (EV_A_ w);
		1128	}
		1129
		1130	void
		1131	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1132	{
		1133	if (ev_is_active (w))
693	return;	1134	return;
		1135
		1136	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694		1137
695	/* this formula differs from the one in periodic_reify because we do not always round up */	1138	/* this formula differs from the one in periodic_reify because we do not always round up */
696	if (w->interval)	1139	if (w->interval)
697	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1140	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
698		1141
699	ev_start ((W)w, ++periodiccnt);	1142	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1143	array_needsize (periodics, periodicmax, periodiccnt, );
701	periodics [periodiccnt - 1] = w;	1144	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1145	upheap ((WT *)periodics, periodiccnt - 1);
703	}	1146	}
704		1147
705	void	1148	void
706	evperiodic_stop (struct ev_periodic *w)	1149	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1150	{
		1151	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1152	if (!ev_is_active (w))
709	return;	1153	return;
710		1154
711	if (w->active < periodiccnt--)	1155	if (w->active < periodiccnt--)
712	{	1156	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1157	periodics [w->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1158	downheap ((WT *)periodics, periodiccnt, w->active - 1);
715	}	1159	}
716		1160
717	ev_stop ((W)w);	1161	ev_stop (EV_A_ (W)w);
718	}	1162	}
719		1163
720	void	1164	void
721	evsignal_start (struct ev_signal *w)	1165	ev_idle_start (EV_P_ struct ev_idle *w)
722	{	1166	{
723	if (ev_is_active (w))	1167	if (ev_is_active (w))
724	return;	1168	return;
725		1169
		1170	ev_start (EV_A_ (W)w, ++idlecnt);
		1171	array_needsize (idles, idlemax, idlecnt, );
		1172	idles [idlecnt - 1] = w;
		1173	}
		1174
		1175	void
		1176	ev_idle_stop (EV_P_ struct ev_idle *w)
		1177	{
		1178	ev_clear_pending (EV_A_ (W)w);
		1179	if (ev_is_active (w))
		1180	return;
		1181
		1182	idles [w->active - 1] = idles [--idlecnt];
		1183	ev_stop (EV_A_ (W)w);
		1184	}
		1185
		1186	void
		1187	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1188	{
		1189	if (ev_is_active (w))
		1190	return;
		1191
		1192	ev_start (EV_A_ (W)w, ++preparecnt);
		1193	array_needsize (prepares, preparemax, preparecnt, );
		1194	prepares [preparecnt - 1] = w;
		1195	}
		1196
		1197	void
		1198	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1199	{
		1200	ev_clear_pending (EV_A_ (W)w);
		1201	if (ev_is_active (w))
		1202	return;
		1203
		1204	prepares [w->active - 1] = prepares [--preparecnt];
		1205	ev_stop (EV_A_ (W)w);
		1206	}
		1207
		1208	void
		1209	ev_check_start (EV_P_ struct ev_check *w)
		1210	{
		1211	if (ev_is_active (w))
		1212	return;
		1213
		1214	ev_start (EV_A_ (W)w, ++checkcnt);
		1215	array_needsize (checks, checkmax, checkcnt, );
		1216	checks [checkcnt - 1] = w;
		1217	}
		1218
		1219	void
		1220	ev_check_stop (EV_P_ struct ev_check *w)
		1221	{
		1222	ev_clear_pending (EV_A_ (W)w);
		1223	if (ev_is_active (w))
		1224	return;
		1225
		1226	checks [w->active - 1] = checks [--checkcnt];
		1227	ev_stop (EV_A_ (W)w);
		1228	}
		1229
		1230	#ifndef SA_RESTART
		1231	# define SA_RESTART 0
		1232	#endif
		1233
		1234	void
		1235	ev_signal_start (EV_P_ struct ev_signal *w)
		1236	{
		1237	#if EV_MULTIPLICITY
		1238	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1239	#endif
		1240	if (ev_is_active (w))
		1241	return;
		1242
		1243	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1244
726	ev_start ((W)w, 1);	1245	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1246	array_needsize (signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1247	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1248
730	if (!w->next)	1249	if (!w->next)
731	{	1250	{
732	struct sigaction sa;	1251	struct sigaction sa;
733	sa.sa_handler = sighandler;	1252	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1253	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1254	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1255	sigaction (w->signum, &sa, 0);
737	}	1256	}
738	}	1257	}
739		1258
740	void	1259	void
741	evsignal_stop (struct ev_signal *w)	1260	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1261	{
		1262	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
744	return;	1264	return;
745		1265
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1266	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1267	ev_stop (EV_A_ (W)w);
748		1268
749	if (!signals [w->signum - 1].head)	1269	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1270	signal (w->signum, SIG_DFL);
751	}	1271	}
752		1272
753	void evidle_start (struct ev_idle *w)	1273	void
		1274	ev_child_start (EV_P_ struct ev_child *w)
754	{	1275	{
		1276	#if EV_MULTIPLICITY
		1277	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1278	#endif
755	if (ev_is_active (w))	1279	if (ev_is_active (w))
756	return;	1280	return;
757		1281
758	ev_start ((W)w, ++idlecnt);	1282	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	1283	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	1284	}
762		1285
763	void evidle_stop (struct ev_idle *w)	1286	void
		1287	ev_child_stop (EV_P_ struct ev_child *w)
764	{	1288	{
765	idles [w->active - 1] = idles [--idlecnt];	1289	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))	1290	if (ev_is_active (w))
772	return;	1291	return;
773		1292
774	ev_start ((W)w, ++checkcnt);	1293	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);	1294	ev_stop (EV_A_ (W)w);
783	}	1295	}
784		1296
785	/*****************************************************************************/	1297	/*****************************************************************************/
786		1298
787	#if 1	1299	struct ev_once
788		1300	{
789	struct ev_io wio;	1301	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;	1302	struct ev_timer to;
843	evtimer_init (&t1, ocb, 5, 10);	1303	void (cb)(int revents, void arg);
844	evtimer_start (&t1);	1304	void *arg;
		1305	};
845		1306
846	struct ev_signal sig;	1307	static void
847	evsignal_init (&sig, scb, SIGQUIT);	1308	once_cb (EV_P_ struct ev_once *once, int revents)
848	evsignal_start (&sig);	1309	{
		1310	void (cb)(int revents, void arg) = once->cb;
		1311	void *arg = once->arg;
849		1312
850	struct ev_check cw;	1313	ev_io_stop (EV_A_ &once->io);
851	evcheck_init (&cw, gcb);	1314	ev_timer_stop (EV_A_ &once->to);
852	evcheck_start (&cw);	1315	free (once);
853		1316
854	struct ev_idle iw;	1317	cb (revents, arg);
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;
861	}	1318	}
862		1319
863	#endif	1320	static void
		1321	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1322	{
		1323	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1324	}
864		1325
		1326	static void
		1327	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1328	{
		1329	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1330	}
865		1331
		1332	void
		1333	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1334	{
		1335	struct ev_once *once = malloc (sizeof (struct ev_once));
866		1336
		1337	if (!once)
		1338	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1339	else
		1340	{
		1341	once->cb = cb;
		1342	once->arg = arg;
867		1343
		1344	ev_watcher_init (&once->io, once_cb_io);
		1345	if (fd >= 0)
		1346	{
		1347	ev_io_set (&once->io, fd, events);
		1348	ev_io_start (EV_A_ &once->io);
		1349	}
		1350
		1351	ev_watcher_init (&once->to, once_cb_to);
		1352	if (timeout >= 0.)
		1353	{
		1354	ev_timer_set (&once->to, timeout, 0.);
		1355	ev_timer_start (EV_A_ &once->to);
		1356	}
		1357	}
		1358	}
		1359

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs. Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.59 by root, Sun Nov 4 18:15:16 2007 UTC