[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 1.56 by root, Sun Nov 4 15:58:49 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_USEV_POLL
		64	# define EV_USEV_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;
236		414
237	static void	415	static void
238	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
239	{	417	{
240	while (count--)	418	while (count--)
241	{	419	{
242	base->head = 0;	420	base->head = 0;
243	base->gotsig = 0;	421	base->gotsig = 0;
		422
244	++base;	423	++base;
245	}	424	}
246	}	425	}
247		426
248	static void	427	static void
250	{	429	{
251	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
252		431
253	if (!gotsig)	432	if (!gotsig)
254	{	433	{
		434	int old_errno = errno;
255	gotsig = 1;	435	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
257	}	438	}
258	}	439	}
259		440
260	static void	441	static void
261	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	443	{
263	struct ev_signal *w;	444	struct ev_watcher_list *w;
264	int sig;	445	int signum;
265		446
		447	read (sigpipe [0], &revents, 1);
266	gotsig = 0;	448	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		449
269	for (sig = signalmax; sig--; )	450	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	451	if (signals [signum].gotsig)
271	{	452	{
272	signals [sig].gotsig = 0;	453	signals [signum].gotsig = 0;
273		454
274	for (w = signals [sig].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
276	}	457	}
277	}	458	}
278		459
279	static void	460	static void
280	siginit (void)	461	siginit (EV_P)
281	{	462	{
		463	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		466
285	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
288		471
289	evio_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	475	}
292		476
293	/*****************************************************************************/	477	/*****************************************************************************/
294		478
295	static struct ev_idle **idles;	479	#ifndef WIN32
296	static int idlemax, idlecnt;
297		480
298	static struct ev_check **checks;	481	#ifndef WCONTINUED
299	static int checkmax, checkcnt;	482	# define WCONTINUED 0
		483	#endif
		484
		485	static void
		486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		487	{
		488	struct ev_child *w;
		489
		490	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		491	if (w->pid == pid \|\| !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it now */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
		503	int pid, status;
		504
		505	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		506	{
		507	/* make sure we are called again until all childs have been reaped */
		508	event (EV_A_ (W)sw, EV_SIGNAL);
		509
		510	child_reap (EV_A_ sw, pid, pid, status);
		511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
		513	}
		514
		515	#endif
300		516
301	/*****************************************************************************/	517	/*****************************************************************************/
302		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
303	#if HAVE_EPOLL	522	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	523	# include "ev_epoll.c"
305	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
306	#if HAVE_SELECT	528	#if EV_USE_SELECT
307	# include "ev_select.c"	529	# include "ev_select.c"
308	#endif	530	#endif
309		531
310	int ev_init (int flags)	532	int
		533	ev_version_major (void)
311	{	534	{
		535	return EV_VERSION_MAJOR;
		536	}
		537
		538	int
		539	ev_version_minor (void)
		540	{
		541	return EV_VERSION_MINOR;
		542	}
		543
		544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
		547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	\|\| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
		565	if (!method)
		566	{
312	#if HAVE_MONOTONIC	567	#if EV_USE_MONOTONIC
313	{	568	{
314	struct timespec ts;	569	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	571	have_monotonic = 1;
317	}	572	}
318	#endif	573	#endif
319		574
320	ev_now = ev_time ();	575	rt_now = ev_time ();
321	now = get_clock ();	576	mn_now = get_clock ();
322	diff = ev_now - now;	577	now_floor = mn_now;
		578	rtmn_diff = rt_now - mn_now;
323		579
		580	if (methods == EVMETHOD_AUTO)
		581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
		584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
		590	#if EV_USE_EPOLL
		591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		595	#endif
		596	#if EV_USE_SELECT
		597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		598	#endif
		599	}
		600	}
		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/TODO/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/TODO/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
324	if (pipe (sigpipe))	676	if (pipe (sigpipe))
325	return 0;	677	return 0;
326		678
327	ev_method = EVMETHOD_NONE;	679	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	{	680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
		689	if (ev_method (EV_A))
		690	{
337	evw_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
338	siginit ();	693	siginit (EV_A);
339	}
340		694
341	return ev_method;	695	#ifndef WIN32
342	}	696	ev_signal_init (&childev, childcb, SIGCHLD);
343		697	ev_set_priority (&childev, EV_MAXPRI);
344	/*****************************************************************************/	698	ev_signal_start (EV_A_ &childev);
345		699	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	700	#endif
		701	}
		702	else
		703	default_loop = 0;
		704	}
362		705
		706	return default_loop;
		707	}
		708
		709	void
		710	ev_default_destroy (void)
		711	{
		712	struct ev_loop *loop = default_loop;
		713
		714	ev_ref (EV_A); /* child watcher */
		715	ev_signal_stop (EV_A_ &childev);
		716
		717	ev_ref (EV_A); /* signal watcher */
363	evio_stop (&sigev);	718	ev_io_stop (EV_A_ &sigev);
		719
		720	close (sigpipe [0]); sigpipe [0] = 0;
		721	close (sigpipe [1]); sigpipe [1] = 0;
		722
		723	loop_destroy (EV_A);
		724	}
		725
		726	void
		727	ev_default_fork (EV_P)
		728	{
		729	loop_fork (EV_A);
		730
		731	ev_io_stop (EV_A_ &sigev);
364	close (sigpipe [0]);	732	close (sigpipe [0]);
365	close (sigpipe [1]);	733	close (sigpipe [1]);
366	pipe (sigpipe);	734	pipe (sigpipe);
		735
		736	ev_ref (EV_A); /* signal watcher */
367	siginit ();	737	siginit (EV_A);
368	}	738	}
369		739
370	/*****************************************************************************/	740	/*****************************************************************************/
371		741
372	static void	742	static void
373	fd_reify (void)	743	call_pending (EV_P)
374	{	744	{
375	int i;	745	int pri;
376		746
377	for (i = 0; i < fdchangecnt; ++i)	747	for (pri = NUMPRI; pri--; )
378	{	748	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	{	749	{
390	method_modify (fd, anfd->wev, wev);	750	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391	anfd->wev = wev;
392	}
393	}
394		751
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)	752	if (p->w)
408	{	753	{
409	p->w->pending = 0;	754	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	755	p->w->cb (EV_A_ p->w, p->events);
411	}	756	}
412	}	757	}
413
414	pendingcnt = 0;
415	}	758	}
416		759
417	static void	760	static void
418	timers_reify ()	761	timers_reify (EV_P)
419	{	762	{
420	while (timercnt && timers [0]->at <= now)	763	while (timercnt && timers [0]->at <= mn_now)
421	{	764	{
422	struct ev_timer *w = timers [0];	765	struct ev_timer *w = timers [0];
423		766
424	/* first reschedule or stop timer */	767	/* first reschedule or stop timer */
425	if (w->repeat)	768	if (w->repeat)
426	{	769	{
		770	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	771	w->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	772	downheap ((WT *)timers, timercnt, 0);
430	}	773	}
431	else	774	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	775	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		776
434	event ((W)w, EV_TIMEOUT);	777	event (EV_A_ (W)w, EV_TIMEOUT);
435	}	778	}
436	}	779	}
437		780
438	static void	781	static void
439	periodics_reify ()	782	periodics_reify (EV_P)
440	{	783	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	784	while (periodiccnt && periodics [0]->at <= rt_now)
442	{	785	{
443	struct ev_periodic *w = periodics [0];	786	struct ev_periodic *w = periodics [0];
444		787
445	/* first reschedule or stop timer */	788	/* first reschedule or stop timer */
446	if (w->interval)	789	if (w->interval)
447	{	790	{
448	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	791	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));	792	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
450	downheap ((WT *)periodics, periodiccnt, 0);	793	downheap ((WT *)periodics, periodiccnt, 0);
451	}	794	}
452	else	795	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	796	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		797
455	event ((W)w, EV_TIMEOUT);	798	event (EV_A_ (W)w, EV_PERIODIC);
456	}	799	}
457	}	800	}
458		801
459	static void	802	static void
460	time_jump (ev_tstamp diff)	803	periodics_reschedule (EV_P)
461	{	804	{
462	int i;	805	int i;
463		806
464	/* adjust periodics */	807	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	808	for (i = 0; i < periodiccnt; ++i)
466	{	809	{
467	struct ev_periodic *w = periodics [i];	810	struct ev_periodic *w = periodics [i];
468		811
469	if (w->interval)	812	if (w->interval)
470	{	813	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	814	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
472		815
473	if (fabs (diff) >= 1e-4)	816	if (fabs (diff) >= 1e-4)
474	{	817	{
475	evperiodic_stop (w);	818	ev_periodic_stop (EV_A_ w);
476	evperiodic_start (w);	819	ev_periodic_start (EV_A_ w);
477		820
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */	821	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	822	}
480	}	823	}
481	}	824	}
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	}	825	}
487		826
		827	inline int
		828	time_update_monotonic (EV_P)
		829	{
		830	mn_now = get_clock ();
		831
		832	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		833	{
		834	rt_now = rtmn_diff + mn_now;
		835	return 0;
		836	}
		837	else
		838	{
		839	now_floor = mn_now;
		840	rt_now = ev_time ();
		841	return 1;
		842	}
		843	}
		844
488	static void	845	static void
489	time_update ()	846	time_update (EV_P)
490	{	847	{
491	int i;	848	int i;
492		849
493	ev_now = ev_time ();	850	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	851	if (expect_true (have_monotonic))
496	{	852	{
497	ev_tstamp odiff = diff;	853	if (time_update_monotonic (EV_A))
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	854	{
501	now = get_clock ();	855	ev_tstamp odiff = rtmn_diff;
		856
		857	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		858	{
502	diff = ev_now - now;	859	rtmn_diff = rt_now - mn_now;
503		860
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	861	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	862	return; /* all is well */
506		863
507	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = get_clock ();
		866	now_floor = mn_now;
		867	}
		868
		869	periodics_reschedule (EV_A);
		870	/* no timer adjustment, as the monotonic clock doesn't jump */
		871	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
508	}	872	}
509
510	time_jump (diff - odiff);
511	}	873	}
512	else	874	else
		875	#endif
513	{	876	{
514	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	877	rt_now = ev_time ();
515	time_jump (ev_now - now);
516		878
		879	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		880	{
		881	periodics_reschedule (EV_A);
		882
		883	/* adjust timers. this is easy, as the offset is the same for all */
		884	for (i = 0; i < timercnt; ++i)
		885	timers [i]->at += rt_now - mn_now;
		886	}
		887
517	now = ev_now;	888	mn_now = rt_now;
518	}	889	}
519	}	890	}
520		891
521	int ev_loop_done;	892	void
		893	ev_ref (EV_P)
		894	{
		895	++activecnt;
		896	}
522		897
		898	void
		899	ev_unref (EV_P)
		900	{
		901	--activecnt;
		902	}
		903
		904	static int loop_done;
		905
		906	void
523	void ev_loop (int flags)	907	ev_loop (EV_P_ int flags)
524	{	908	{
525	double block;	909	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	910	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		911
534	do	912	do
535	{	913	{
		914	/* queue check watchers (and execute them) */
		915	if (expect_false (preparecnt))
		916	{
		917	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		918	call_pending (EV_A);
		919	}
		920
536	/* update fd-related kernel structures */	921	/* update fd-related kernel structures */
537	fd_reify ();	922	fd_reify (EV_A);
538		923
539	/* calculate blocking time */	924	/* calculate blocking time */
540		925
541	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	926	/* we only need this for !monotonic clockor timers, but as we basically
		927	always have timers, we just calculate it always */
		928	#if EV_USE_MONOTONIC
		929	if (expect_true (have_monotonic))
		930	time_update_monotonic (EV_A);
		931	else
		932	#endif
		933	{
542	ev_now = ev_time ();	934	rt_now = ev_time ();
		935	mn_now = rt_now;
		936	}
543		937
544	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	938	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
545	block = 0.;	939	block = 0.;
546	else	940	else
547	{	941	{
548	block = MAX_BLOCKTIME;	942	block = MAX_BLOCKTIME;
549		943
550	if (timercnt)	944	if (timercnt)
551	{	945	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	946	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
553	if (block > to) block = to;	947	if (block > to) block = to;
554	}	948	}
555		949
556	if (periodiccnt)	950	if (periodiccnt)
557	{	951	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	952	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
559	if (block > to) block = to;	953	if (block > to) block = to;
560	}	954	}
561		955
562	if (block < 0.) block = 0.;	956	if (block < 0.) block = 0.;
563	}	957	}
564		958
565	method_poll (block);	959	method_poll (EV_A_ block);
566		960
567	/* update ev_now, do magic */	961	/* update rt_now, do magic */
568	time_update ();	962	time_update (EV_A);
569		963
570	/* queue pending timers and reschedule them */	964	/* queue pending timers and reschedule them */
		965	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	966	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		967
574	/* queue idle watchers unless io or timers are pending */	968	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	969	if (!pendingcnt)
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	970	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		971
578	/* queue check and possibly idle watchers */	972	/* queue check watchers, to be executed first */
		973	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	974	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		975
581	call_pending ();	976	call_pending (EV_A);
582	}	977	}
583	while (!ev_loop_done);	978	while (activecnt && !loop_done);
		979
		980	if (loop_done != 2)
		981	loop_done = 0;
		982	}
		983
		984	void
		985	ev_unloop (EV_P_ int how)
		986	{
		987	loop_done = how;
584	}	988	}
585		989
586	/*****************************************************************************/	990	/*****************************************************************************/
587		991
588	static void	992	inline void
589	wlist_add (WL *head, WL elem)	993	wlist_add (WL *head, WL elem)
590	{	994	{
591	elem->next = *head;	995	elem->next = *head;
592	*head = elem;	996	*head = elem;
593	}	997	}
594		998
595	static void	999	inline void
596	wlist_del (WL *head, WL elem)	1000	wlist_del (WL *head, WL elem)
597	{	1001	{
598	while (*head)	1002	while (*head)
599	{	1003	{
600	if (*head == elem)	1004	if (*head == elem)
…		…
605		1009
606	head = &(*head)->next;	1010	head = &(*head)->next;
607	}	1011	}
608	}	1012	}
609		1013
610	static void	1014	inline void
		1015	ev_clear_pending (EV_P_ W w)
		1016	{
		1017	if (w->pending)
		1018	{
		1019	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1020	w->pending = 0;
		1021	}
		1022	}
		1023
		1024	inline void
611	ev_start (W w, int active)	1025	ev_start (EV_P_ W w, int active)
612	{	1026	{
613	w->pending = 0;	1027	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1028	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1029
614	w->active = active;	1030	w->active = active;
		1031	ev_ref (EV_A);
615	}	1032	}
616		1033
617	static void	1034	inline void
618	ev_stop (W w)	1035	ev_stop (EV_P_ W w)
619	{	1036	{
620	if (w->pending)	1037	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1038	w->active = 0;
624	}	1039	}
625		1040
626	/*****************************************************************************/	1041	/*****************************************************************************/
627		1042
628	void	1043	void
629	evio_start (struct ev_io *w)	1044	ev_io_start (EV_P_ struct ev_io *w)
630	{	1045	{
		1046	int fd = w->fd;
		1047
631	if (ev_is_active (w))	1048	if (ev_is_active (w))
632	return;	1049	return;
633		1050
634	int fd = w->fd;	1051	assert (("ev_io_start called with negative fd", fd >= 0));
635		1052
636	ev_start ((W)w, 1);	1053	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1054	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1055	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		1056
640	++fdchangecnt;	1057	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	1058	}
644		1059
645	void	1060	void
646	evio_stop (struct ev_io *w)	1061	ev_io_stop (EV_P_ struct ev_io *w)
647	{	1062	{
		1063	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
649	return;	1065	return;
650		1066
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1067	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	1068	ev_stop (EV_A_ (W)w);
653		1069
654	++fdchangecnt;	1070	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1071	}
658		1072
659
660	void	1073	void
661	evtimer_start (struct ev_timer *w)	1074	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1075	{
663	if (ev_is_active (w))	1076	if (ev_is_active (w))
664	return;	1077	return;
665		1078
666	w->at += now;	1079	w->at += mn_now;
667		1080
		1081	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1082
668	ev_start ((W)w, ++timercnt);	1083	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1084	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;	1085	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1086	upheap ((WT *)timers, timercnt - 1);
672	}	1087	}
673		1088
674	void	1089	void
675	evtimer_stop (struct ev_timer *w)	1090	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1091	{
		1092	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1093	if (!ev_is_active (w))
678	return;	1094	return;
679		1095
680	if (w->active < timercnt--)	1096	if (w->active < timercnt--)
681	{	1097	{
682	timers [w->active - 1] = timers [timercnt];	1098	timers [w->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1099	downheap ((WT *)timers, timercnt, w->active - 1);
684	}	1100	}
685		1101
		1102	w->at = w->repeat;
		1103
686	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
687	}	1105	}
688		1106
689	void	1107	void
690	evperiodic_start (struct ev_periodic *w)	1108	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1109	{
692	if (ev_is_active (w))	1110	if (ev_is_active (w))
		1111	{
		1112	if (w->repeat)
		1113	{
		1114	w->at = mn_now + w->repeat;
		1115	downheap ((WT *)timers, timercnt, w->active - 1);
		1116	}
		1117	else
		1118	ev_timer_stop (EV_A_ w);
		1119	}
		1120	else if (w->repeat)
		1121	ev_timer_start (EV_A_ w);
		1122	}
		1123
		1124	void
		1125	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1126	{
		1127	if (ev_is_active (w))
693	return;	1128	return;
		1129
		1130	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694		1131
695	/* this formula differs from the one in periodic_reify because we do not always round up */	1132	/* this formula differs from the one in periodic_reify because we do not always round up */
696	if (w->interval)	1133	if (w->interval)
697	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1134	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
698		1135
699	ev_start ((W)w, ++periodiccnt);	1136	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1137	array_needsize (periodics, periodicmax, periodiccnt, );
701	periodics [periodiccnt - 1] = w;	1138	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1139	upheap ((WT *)periodics, periodiccnt - 1);
703	}	1140	}
704		1141
705	void	1142	void
706	evperiodic_stop (struct ev_periodic *w)	1143	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1144	{
		1145	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1146	if (!ev_is_active (w))
709	return;	1147	return;
710		1148
711	if (w->active < periodiccnt--)	1149	if (w->active < periodiccnt--)
712	{	1150	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1151	periodics [w->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1152	downheap ((WT *)periodics, periodiccnt, w->active - 1);
715	}	1153	}
716		1154
717	ev_stop ((W)w);	1155	ev_stop (EV_A_ (W)w);
718	}	1156	}
719		1157
720	void	1158	void
721	evsignal_start (struct ev_signal *w)	1159	ev_idle_start (EV_P_ struct ev_idle *w)
722	{	1160	{
723	if (ev_is_active (w))	1161	if (ev_is_active (w))
724	return;	1162	return;
725		1163
		1164	ev_start (EV_A_ (W)w, ++idlecnt);
		1165	array_needsize (idles, idlemax, idlecnt, );
		1166	idles [idlecnt - 1] = w;
		1167	}
		1168
		1169	void
		1170	ev_idle_stop (EV_P_ struct ev_idle *w)
		1171	{
		1172	ev_clear_pending (EV_A_ (W)w);
		1173	if (ev_is_active (w))
		1174	return;
		1175
		1176	idles [w->active - 1] = idles [--idlecnt];
		1177	ev_stop (EV_A_ (W)w);
		1178	}
		1179
		1180	void
		1181	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1182	{
		1183	if (ev_is_active (w))
		1184	return;
		1185
		1186	ev_start (EV_A_ (W)w, ++preparecnt);
		1187	array_needsize (prepares, preparemax, preparecnt, );
		1188	prepares [preparecnt - 1] = w;
		1189	}
		1190
		1191	void
		1192	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1193	{
		1194	ev_clear_pending (EV_A_ (W)w);
		1195	if (ev_is_active (w))
		1196	return;
		1197
		1198	prepares [w->active - 1] = prepares [--preparecnt];
		1199	ev_stop (EV_A_ (W)w);
		1200	}
		1201
		1202	void
		1203	ev_check_start (EV_P_ struct ev_check *w)
		1204	{
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	ev_start (EV_A_ (W)w, ++checkcnt);
		1209	array_needsize (checks, checkmax, checkcnt, );
		1210	checks [checkcnt - 1] = w;
		1211	}
		1212
		1213	void
		1214	ev_check_stop (EV_P_ struct ev_check *w)
		1215	{
		1216	ev_clear_pending (EV_A_ (W)w);
		1217	if (ev_is_active (w))
		1218	return;
		1219
		1220	checks [w->active - 1] = checks [--checkcnt];
		1221	ev_stop (EV_A_ (W)w);
		1222	}
		1223
		1224	#ifndef SA_RESTART
		1225	# define SA_RESTART 0
		1226	#endif
		1227
		1228	void
		1229	ev_signal_start (EV_P_ struct ev_signal *w)
		1230	{
		1231	#if EV_MULTIPLICITY
		1232	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1233	#endif
		1234	if (ev_is_active (w))
		1235	return;
		1236
		1237	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1238
726	ev_start ((W)w, 1);	1239	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1240	array_needsize (signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1241	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1242
730	if (!w->next)	1243	if (!w->next)
731	{	1244	{
732	struct sigaction sa;	1245	struct sigaction sa;
733	sa.sa_handler = sighandler;	1246	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1247	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1248	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1249	sigaction (w->signum, &sa, 0);
737	}	1250	}
738	}	1251	}
739		1252
740	void	1253	void
741	evsignal_stop (struct ev_signal *w)	1254	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1255	{
		1256	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1257	if (!ev_is_active (w))
744	return;	1258	return;
745		1259
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1260	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1261	ev_stop (EV_A_ (W)w);
748		1262
749	if (!signals [w->signum - 1].head)	1263	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1264	signal (w->signum, SIG_DFL);
751	}	1265	}
752		1266
753	void evidle_start (struct ev_idle *w)	1267	void
		1268	ev_child_start (EV_P_ struct ev_child *w)
754	{	1269	{
		1270	#if EV_MULTIPLICITY
		1271	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1272	#endif
755	if (ev_is_active (w))	1273	if (ev_is_active (w))
756	return;	1274	return;
757		1275
758	ev_start ((W)w, ++idlecnt);	1276	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	1277	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	1278	}
762		1279
763	void evidle_stop (struct ev_idle *w)	1280	void
		1281	ev_child_stop (EV_P_ struct ev_child *w)
764	{	1282	{
765	idles [w->active - 1] = idles [--idlecnt];	1283	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))	1284	if (ev_is_active (w))
772	return;	1285	return;
773		1286
774	ev_start ((W)w, ++checkcnt);	1287	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);	1288	ev_stop (EV_A_ (W)w);
783	}	1289	}
784		1290
785	/*****************************************************************************/	1291	/*****************************************************************************/
786		1292
787	#if 1	1293	struct ev_once
788		1294	{
789	struct ev_io wio;	1295	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;	1296	struct ev_timer to;
843	evtimer_init (&t1, ocb, 5, 10);	1297	void (cb)(int revents, void arg);
844	evtimer_start (&t1);	1298	void *arg;
		1299	};
845		1300
846	struct ev_signal sig;	1301	static void
847	evsignal_init (&sig, scb, SIGQUIT);	1302	once_cb (EV_P_ struct ev_once *once, int revents)
848	evsignal_start (&sig);	1303	{
		1304	void (cb)(int revents, void arg) = once->cb;
		1305	void *arg = once->arg;
849		1306
850	struct ev_check cw;	1307	ev_io_stop (EV_A_ &once->io);
851	evcheck_init (&cw, gcb);	1308	ev_timer_stop (EV_A_ &once->to);
852	evcheck_start (&cw);	1309	free (once);
853		1310
854	struct ev_idle iw;	1311	cb (revents, arg);
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;
861	}	1312	}
862		1313
863	#endif	1314	static void
		1315	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1316	{
		1317	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1318	}
864		1319
		1320	static void
		1321	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1322	{
		1323	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1324	}
865		1325
		1326	void
		1327	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1328	{
		1329	struct ev_once *once = malloc (sizeof (struct ev_once));
866		1330
		1331	if (!once)
		1332	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1333	else
		1334	{
		1335	once->cb = cb;
		1336	once->arg = arg;
867		1337
		1338	ev_watcher_init (&once->io, once_cb_io);
		1339	if (fd >= 0)
		1340	{
		1341	ev_io_set (&once->io, fd, events);
		1342	ev_io_start (EV_A_ &once->io);
		1343	}
		1344
		1345	ev_watcher_init (&once->to, once_cb_to);
		1346	if (timeout >= 0.)
		1347	{
		1348	ev_timer_set (&once->to, timeout, 0.);
		1349	ev_timer_start (EV_A_ &once->to);
		1350	}
		1351	}
		1352	}
		1353

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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 1.56 by root, Sun Nov 4 15:58:49 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 1.56 by root, Sun Nov 4 15:58:49 2007 UTC