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

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 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>
7		41
8	#include <stdio.h>	42	#include <stdio.h>
9		43
10	#include <assert.h>	44	#include <assert.h>
11	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
12	#include <sys/time.h>	50	#include <sys/time.h>
13	#include <time.h>	51	#include <time.h>
14		52
15	#define HAVE_EPOLL 1	53	/**/
16		54
17	#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
18	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
19	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
20	# endif	84	#endif
21	#endif
22		85
23	#ifndef HAVE_SELECT
24	# define HAVE_SELECT 1
25	#endif
26
27	#ifndef HAVE_EPOLL
28	# define HAVE_EPOLL 0
29	#endif
30
31	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
33	#endif	89	#endif
		90
		91	/**/
34		92
35	#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) */
36	#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 */
37		97
38	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
39		113
40	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
41	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
42	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
43		117
44	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
45	ev_tstamp ev_now;
46	int ev_method;
47
48	static int have_monotonic; /* runtime */
49
50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
51	static void (*method_modify)(int fd, int oev, int nev);
52	static void (*method_poll)(ev_tstamp timeout);
53		119
54	/*****************************************************************************/	120	/*****************************************************************************/
55		121
56	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
57	ev_time (void)	156	ev_time (void)
58	{	157	{
59	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
60	struct timespec ts;	159	struct timespec ts;
61	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
62	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
63	#else	162	#else
64	struct timeval tv;	163	struct timeval tv;
65	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
66	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
67	#endif	166	#endif
68	}	167	}
69		168
70	static ev_tstamp	169	inline ev_tstamp
71	get_clock (void)	170	get_clock (void)
72	{	171	{
73	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
74	if (have_monotonic)	173	if (expect_true (have_monotonic))
75	{	174	{
76	struct timespec ts;	175	struct timespec ts;
77	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
78	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
79	}	178	}
80	#endif	179	#endif
81		180
82	return ev_time ();	181	return ev_time ();
83	}	182	}
84		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
85	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
86	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
87	{ \	194	{ \
88	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
		196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
89	base = realloc (base, sizeof (base) (newcnt)); \	202	base = realloc (base, sizeof (base) (newcnt)); \
90	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	204	cur = newcnt; \
92	}	205	}
93		206
94	/*****************************************************************************/	207	/*****************************************************************************/
95		208
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	209	static void
109	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
110	{	211	{
111	while (count--)	212	while (count--)
112	{	213	{
113	base->head = 0;	214	base->head = 0;
114	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
115	++base;	218	++base;
116	}	219	}
117	}	220	}
118		221
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void	222	static void
129	event (W w, int events)	223	event (EV_P_ W w, int events)
130	{	224	{
131	if (w->active)	225	if (w->pending)
132	{	226	{
133	w->pending = ++pendingcnt;
134	array_needsize (pendings, pendingmax, pendingcnt, );
135	pendings [pendingcnt - 1].w = w;
136	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		228	return;
137	}	229	}
138	}
139		230
		231	w->pending = ++pendingcnt [ABSPRI (w)];
		232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		233	pendings [ABSPRI (w)][w->pending - 1].w = w;
		234	pendings [ABSPRI (w)][w->pending - 1].events = events;
		235	}
		236
140	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
141	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
142	{	248	{
143	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
144	struct ev_io *w;	250	struct ev_io *w;
145		251
146	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
147	{	253	{
148	int ev = w->events & events;	254	int ev = w->events & events;
149		255
150	if (ev)	256	if (ev)
151	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
152	}	258	}
153	}	259	}
154		260
		261	/*****************************************************************************/
		262
155	static void	263	static void
156	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
157	{	265	{
158	int i;	266	int i;
159		267
160	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
161	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	}
162	}	356	}
163		357
164	/*****************************************************************************/	358	/*****************************************************************************/
165		359
166	static struct ev_timer **timers;
167	static int timermax, timercnt;
168
169	static struct ev_periodic **periodics;
170	static int periodicmax, periodiccnt;
171
172	static void	360	static void
173	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
174	{	362	{
175	WT w = timers [k];	363	WT w = heap [k];
176		364
177	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
178	{	366	{
179	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
180	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
181	k >>= 1;	369	k >>= 1;
182	}	370	}
183		371
184	timers [k] = w;	372	heap [k] = w;
185	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
186		374
187	}	375	}
188		376
189	static void	377	static void
190	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
191	{	379	{
192	WT w = timers [k];	380	WT w = heap [k];
193		381
194	while (k < (N >> 1))	382	while (k < (N >> 1))
195	{	383	{
196	int j = k << 1;	384	int j = k << 1;
197		385
198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
199	++j;	387	++j;
200		388
201	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
202	break;	390	break;
203		391
204	timers [k] = timers [j];	392	heap [k] = heap [j];
205	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
206	k = j;	394	k = j;
207	}	395	}
208		396
209	timers [k] = w;	397	heap [k] = w;
210	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
211	}	399	}
212		400
213	/*****************************************************************************/	401	/*****************************************************************************/
214		402
215	typedef struct	403	typedef struct
216	{	404	{
217	struct ev_signal *head;	405	struct ev_watcher_list *head;
218	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
219	} ANSIG;	407	} ANSIG;
220		408
221	static ANSIG *signals;	409	static ANSIG *signals;
222	static int signalmax;	410	static int signalmax;
223		411
224	static int sigpipe [2];	412	static int sigpipe [2];
225	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
226	static struct ev_io sigev;
227		414
228	static void	415	static void
229	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
230	{	417	{
231	while (count--)	418	while (count--)
232	{	419	{
233	base->head = 0;	420	base->head = 0;
234	base->gotsig = 0;	421	base->gotsig = 0;
		422
235	++base;	423	++base;
236	}	424	}
237	}	425	}
238		426
239	static void	427	static void
…		…
241	{	429	{
242	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
243		431
244	if (!gotsig)	432	if (!gotsig)
245	{	433	{
		434	int old_errno = errno;
246	gotsig = 1;	435	gotsig = 1;
247	write (sigpipe [1], &gotsig, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
248	}	438	}
249	}	439	}
250		440
251	static void	441	static void
252	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
253	{	443	{
254	struct ev_signal *w;	444	struct ev_watcher_list *w;
255	int sig;	445	int signum;
256		446
		447	read (sigpipe [0], &revents, 1);
257	gotsig = 0;	448	gotsig = 0;
258	read (sigpipe [0], &revents, 1);
259		449
260	for (sig = signalmax; sig--; )	450	for (signum = signalmax; signum--; )
261	if (signals [sig].gotsig)	451	if (signals [signum].gotsig)
262	{	452	{
263	signals [sig].gotsig = 0;	453	signals [signum].gotsig = 0;
264		454
265	for (w = signals [sig].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
266	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
267	}	457	}
268	}	458	}
269		459
270	static void	460	static void
271	siginit (void)	461	siginit (EV_P)
272	{	462	{
		463	#ifndef WIN32
273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
275		466
276	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
279		471
280	evio_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
281	evio_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
282	}	475	}
283		476
284	/*****************************************************************************/	477	/*****************************************************************************/
285		478
286	static struct ev_idle **idles;	479	#ifndef WIN32
287	static int idlemax, idlecnt;
288		480
289	static struct ev_check **checks;	481	#ifndef WCONTINUED
290	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
291		516
292	/*****************************************************************************/	517	/*****************************************************************************/
293		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
294	#if HAVE_EPOLL	522	#if EV_USE_EPOLL
295	# include "ev_epoll.c"	523	# include "ev_epoll.c"
296	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
297	#if HAVE_SELECT	528	#if EV_USE_SELECT
298	# include "ev_select.c"	529	# include "ev_select.c"
299	#endif	530	#endif
300		531
301	int ev_init (int flags)	532	int
		533	ev_version_major (void)
302	{	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	{
303	#if HAVE_MONOTONIC	567	#if EV_USE_MONOTONIC
304	{	568	{
305	struct timespec ts;	569	struct timespec ts;
306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
307	have_monotonic = 1;	571	have_monotonic = 1;
308	}	572	}
309	#endif	573	#endif
310		574
311	ev_now = ev_time ();	575	rt_now = ev_time ();
312	now = get_clock ();	576	mn_now = get_clock ();
313	diff = ev_now - now;	577	now_floor = mn_now;
		578	rtmn_diff = rt_now - mn_now;
314		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])
315	if (pipe (sigpipe))	676	if (pipe (sigpipe))
316	return 0;	677	return 0;
317		678
318	ev_method = EVMETHOD_NONE;	679	if (!default_loop)
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
321	#endif
322	#if HAVE_SELECT
323	if (ev_method == EVMETHOD_NONE) select_init (flags);
324	#endif
325
326	if (ev_method)
327	{	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	{
328	evw_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
329	siginit ();	693	siginit (EV_A);
330	}
331		694
332	return ev_method;	695	#ifndef WIN32
333	}	696	ev_signal_init (&childev, childcb, SIGCHLD);
334		697	ev_set_priority (&childev, EV_MAXPRI);
335	/*****************************************************************************/	698	ev_signal_start (EV_A_ &childev);
336		699	ev_unref (EV_A); /* child watcher should not keep loop alive */
337	void ev_prefork (void)
338	{
339	/* nop */
340	}
341
342	void ev_postfork_parent (void)
343	{
344	/* nop */
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif	700	#endif
		701	}
		702	else
		703	default_loop = 0;
		704	}
353		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 */
354	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);
355	close (sigpipe [0]);	732	close (sigpipe [0]);
356	close (sigpipe [1]);	733	close (sigpipe [1]);
357	pipe (sigpipe);	734	pipe (sigpipe);
		735
		736	ev_ref (EV_A); /* signal watcher */
358	siginit ();	737	siginit (EV_A);
359	}	738	}
360		739
361	/*****************************************************************************/	740	/*****************************************************************************/
362		741
363	static void	742	static void
364	fd_reify (void)	743	call_pending (EV_P)
365	{	744	{
366	int i;	745	int pri;
367		746
368	for (i = 0; i < fdchangecnt; ++i)	747	for (pri = NUMPRI; pri--; )
369	{	748	while (pendingcnt [pri])
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{	749	{
381	method_modify (fd, anfd->wev, wev);	750	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
382	anfd->wev = wev;
383	}
384	}
385		751
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)	752	if (p->w)
399	{	753	{
400	p->w->pending = 0;	754	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	755	p->w->cb (EV_A_ p->w, p->events);
402	}	756	}
403	}	757	}
404
405	pendingcnt = 0;
406	}	758	}
407		759
408	static void	760	static void
409	timers_reify ()	761	timers_reify (EV_P)
410	{	762	{
411	while (timercnt && timers [0]->at <= now)	763	while (timercnt && timers [0]->at <= mn_now)
412	{	764	{
413	struct ev_timer *w = timers [0];	765	struct ev_timer *w = timers [0];
414
415	event ((W)w, EV_TIMEOUT);
416		766
417	/* first reschedule or stop timer */	767	/* first reschedule or stop timer */
418	if (w->repeat)	768	if (w->repeat)
419	{	769	{
		770	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
420	w->at = now + w->repeat;	771	w->at = mn_now + w->repeat;
421	assert (("timer timeout in the past, negative repeat?", w->at > now));
422	downheap ((WT *)timers, timercnt, 0);	772	downheap ((WT *)timers, timercnt, 0);
423	}	773	}
424	else	774	else
425	evtimer_stop (w); /* nonrepeating: stop timer */	775	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
426	}
427	}
428		776
		777	event (EV_A_ (W)w, EV_TIMEOUT);
		778	}
		779	}
		780
429	static void	781	static void
430	periodics_reify ()	782	periodics_reify (EV_P)
431	{	783	{
432	while (periodiccnt && periodics [0]->at <= ev_now)	784	while (periodiccnt && periodics [0]->at <= rt_now)
433	{	785	{
434	struct ev_periodic *w = periodics [0];	786	struct ev_periodic *w = periodics [0];
435		787
436	/* first reschedule or stop timer */	788	/* first reschedule or stop timer */
437	if (w->interval)	789	if (w->interval)
438	{	790	{
439	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;
440	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));
441	downheap ((WT *)periodics, periodiccnt, 0);	793	downheap ((WT *)periodics, periodiccnt, 0);
442	}	794	}
443	else	795	else
444	evperiodic_stop (w); /* nonrepeating: stop timer */	796	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
445		797
446	event ((W)w, EV_TIMEOUT);	798	event (EV_A_ (W)w, EV_PERIODIC);
447	}	799	}
448	}	800	}
449		801
450	static void	802	static void
451	periodics_reschedule (ev_tstamp diff)	803	periodics_reschedule (EV_P)
452	{	804	{
453	int i;	805	int i;
454		806
455	/* adjust periodics after time jump */	807	/* adjust periodics after time jump */
456	for (i = 0; i < periodiccnt; ++i)	808	for (i = 0; i < periodiccnt; ++i)
457	{	809	{
458	struct ev_periodic *w = periodics [i];	810	struct ev_periodic *w = periodics [i];
459		811
460	if (w->interval)	812	if (w->interval)
461	{	813	{
462	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;
463		815
464	if (fabs (diff) >= 1e-4)	816	if (fabs (diff) >= 1e-4)
465	{	817	{
466	evperiodic_stop (w);	818	ev_periodic_stop (EV_A_ w);
467	evperiodic_start (w);	819	ev_periodic_start (EV_A_ w);
468		820
469	i = 0; /* restart loop, inefficient, but time jumps should be rare */	821	i = 0; /* restart loop, inefficient, but time jumps should be rare */
470	}	822	}
471	}	823	}
472	}	824	}
473	}	825	}
474		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
475	static void	845	static void
476	time_update ()	846	time_update (EV_P)
477	{	847	{
478	int i;	848	int i;
479		849
480	ev_now = ev_time ();	850	#if EV_USE_MONOTONIC
481
482	if (have_monotonic)	851	if (expect_true (have_monotonic))
483	{	852	{
484	ev_tstamp odiff = diff;	853	if (time_update_monotonic (EV_A))
485
486	for (i = 4; --i; ) /* loop a few times, before making important decisions */
487	{	854	{
488	now = get_clock ();	855	ev_tstamp odiff = rtmn_diff;
		856
		857	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		858	{
489	diff = ev_now - now;	859	rtmn_diff = rt_now - mn_now;
490		860
491	if (fabs (odiff - diff) < MIN_TIMEJUMP)	861	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
492	return; /* all is well */	862	return; /* all is well */
493		863
494	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) */
495	}	872	}
496
497	periodics_reschedule (diff - odiff);
498	/* no timer adjustment, as the monotonic clock doesn't jump */
499	}	873	}
500	else	874	else
		875	#endif
501	{	876	{
502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	877	rt_now = ev_time ();
		878
		879	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
503	{	880	{
504	periodics_reschedule (ev_now - now);	881	periodics_reschedule (EV_A);
505		882
506	/* adjust timers. this is easy, as the offset is the same for all */	883	/* adjust timers. this is easy, as the offset is the same for all */
507	for (i = 0; i < timercnt; ++i)	884	for (i = 0; i < timercnt; ++i)
508	timers [i]->at += diff;	885	timers [i]->at += rt_now - mn_now;
509	}	886	}
510		887
511	now = ev_now;	888	mn_now = rt_now;
512	}	889	}
513	}	890	}
514		891
515	int ev_loop_done;	892	void
		893	ev_ref (EV_P)
		894	{
		895	++activecnt;
		896	}
516		897
		898	void
		899	ev_unref (EV_P)
		900	{
		901	--activecnt;
		902	}
		903
		904	static int loop_done;
		905
		906	void
517	void ev_loop (int flags)	907	ev_loop (EV_P_ int flags)
518	{	908	{
519	double block;	909	double block;
520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	910	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
521
522	if (checkcnt)
523	{
524	queue_events ((W *)checks, checkcnt, EV_CHECK);
525	call_pending ();
526	}
527		911
528	do	912	do
529	{	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
530	/* update fd-related kernel structures */	921	/* update fd-related kernel structures */
531	fd_reify ();	922	fd_reify (EV_A);
532		923
533	/* calculate blocking time */	924	/* calculate blocking time */
534		925
535	/* 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	{
536	ev_now = ev_time ();	934	rt_now = ev_time ();
		935	mn_now = rt_now;
		936	}
537		937
538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	938	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
539	block = 0.;	939	block = 0.;
540	else	940	else
541	{	941	{
542	block = MAX_BLOCKTIME;	942	block = MAX_BLOCKTIME;
543		943
544	if (timercnt)	944	if (timercnt)
545	{	945	{
546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	946	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
547	if (block > to) block = to;	947	if (block > to) block = to;
548	}	948	}
549		949
550	if (periodiccnt)	950	if (periodiccnt)
551	{	951	{
552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	952	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
553	if (block > to) block = to;	953	if (block > to) block = to;
554	}	954	}
555		955
556	if (block < 0.) block = 0.;	956	if (block < 0.) block = 0.;
557	}	957	}
558		958
559	method_poll (block);	959	method_poll (EV_A_ block);
560		960
561	/* update ev_now, do magic */	961	/* update rt_now, do magic */
562	time_update ();	962	time_update (EV_A);
563		963
564	/* queue pending timers and reschedule them */	964	/* queue pending timers and reschedule them */
		965	timers_reify (EV_A); /* relative timers called last */
565	periodics_reify (); /* absolute timers first */	966	periodics_reify (EV_A); /* absolute timers called first */
566	timers_reify (); /* relative timers second */
567		967
568	/* queue idle watchers unless io or timers are pending */	968	/* queue idle watchers unless io or timers are pending */
569	if (!pendingcnt)	969	if (!pendingcnt)
570	queue_events ((W *)idles, idlecnt, EV_IDLE);	970	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
571		971
572	/* queue check and possibly idle watchers */	972	/* queue check watchers, to be executed first */
		973	if (checkcnt)
573	queue_events ((W *)checks, checkcnt, EV_CHECK);	974	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
574		975
575	call_pending ();	976	call_pending (EV_A);
576	}	977	}
577	while (!ev_loop_done);	978	while (activecnt && !loop_done);
578		979
579	if (ev_loop_done != 2)	980	if (loop_done != 2)
580	ev_loop_done = 0;	981	loop_done = 0;
		982	}
		983
		984	void
		985	ev_unloop (EV_P_ int how)
		986	{
		987	loop_done = how;
581	}	988	}
582		989
583	/*****************************************************************************/	990	/*****************************************************************************/
584		991
585	static void	992	inline void
586	wlist_add (WL *head, WL elem)	993	wlist_add (WL *head, WL elem)
587	{	994	{
588	elem->next = *head;	995	elem->next = *head;
589	*head = elem;	996	*head = elem;
590	}	997	}
591		998
592	static void	999	inline void
593	wlist_del (WL *head, WL elem)	1000	wlist_del (WL *head, WL elem)
594	{	1001	{
595	while (*head)	1002	while (*head)
596	{	1003	{
597	if (*head == elem)	1004	if (*head == elem)
…		…
602		1009
603	head = &(*head)->next;	1010	head = &(*head)->next;
604	}	1011	}
605	}	1012	}
606		1013
607	static void	1014	inline void
608	ev_clear (W w)	1015	ev_clear_pending (EV_P_ W w)
609	{	1016	{
610	if (w->pending)	1017	if (w->pending)
611	{	1018	{
612	pendings [w->pending - 1].w = 0;	1019	pendings [ABSPRI (w)][w->pending - 1].w = 0;
613	w->pending = 0;	1020	w->pending = 0;
614	}	1021	}
615	}	1022	}
616		1023
617	static void	1024	inline void
618	ev_start (W w, int active)	1025	ev_start (EV_P_ W w, int active)
619	{	1026	{
		1027	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1028	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1029
620	w->active = active;	1030	w->active = active;
		1031	ev_ref (EV_A);
621	}	1032	}
622		1033
623	static void	1034	inline void
624	ev_stop (W w)	1035	ev_stop (EV_P_ W w)
625	{	1036	{
		1037	ev_unref (EV_A);
626	w->active = 0;	1038	w->active = 0;
627	}	1039	}
628		1040
629	/*****************************************************************************/	1041	/*****************************************************************************/
630		1042
631	void	1043	void
632	evio_start (struct ev_io *w)	1044	ev_io_start (EV_P_ struct ev_io *w)
633	{	1045	{
		1046	int fd = w->fd;
		1047
634	if (ev_is_active (w))	1048	if (ev_is_active (w))
635	return;	1049	return;
636		1050
637	int fd = w->fd;	1051	assert (("ev_io_start called with negative fd", fd >= 0));
638		1052
639	ev_start ((W)w, 1);	1053	ev_start (EV_A_ (W)w, 1);
640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1054	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
641	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1055	wlist_add ((WL *)&anfds[fd].head, (WL)w);
642		1056
643	++fdchangecnt;	1057	fd_change (EV_A_ fd);
644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
645	fdchanges [fdchangecnt - 1] = fd;
646	}	1058	}
647		1059
648	void	1060	void
649	evio_stop (struct ev_io *w)	1061	ev_io_stop (EV_P_ struct ev_io *w)
650	{	1062	{
651	ev_clear ((W)w);	1063	ev_clear_pending (EV_A_ (W)w);
652	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
653	return;	1065	return;
654		1066
655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1067	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
656	ev_stop ((W)w);	1068	ev_stop (EV_A_ (W)w);
657		1069
658	++fdchangecnt;	1070	fd_change (EV_A_ w->fd);
659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
660	fdchanges [fdchangecnt - 1] = w->fd;
661	}	1071	}
662		1072
663	void	1073	void
664	evtimer_start (struct ev_timer *w)	1074	ev_timer_start (EV_P_ struct ev_timer *w)
665	{	1075	{
666	if (ev_is_active (w))	1076	if (ev_is_active (w))
667	return;	1077	return;
668		1078
669	w->at += now;	1079	w->at += mn_now;
670		1080
671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1081	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
672		1082
673	ev_start ((W)w, ++timercnt);	1083	ev_start (EV_A_ (W)w, ++timercnt);
674	array_needsize (timers, timermax, timercnt, );	1084	array_needsize (timers, timermax, timercnt, );
675	timers [timercnt - 1] = w;	1085	timers [timercnt - 1] = w;
676	upheap ((WT *)timers, timercnt - 1);	1086	upheap ((WT *)timers, timercnt - 1);
677	}	1087	}
678		1088
679	void	1089	void
680	evtimer_stop (struct ev_timer *w)	1090	ev_timer_stop (EV_P_ struct ev_timer *w)
681	{	1091	{
682	ev_clear ((W)w);	1092	ev_clear_pending (EV_A_ (W)w);
683	if (!ev_is_active (w))	1093	if (!ev_is_active (w))
684	return;	1094	return;
685		1095
686	if (w->active < timercnt--)	1096	if (w->active < timercnt--)
687	{	1097	{
…		…
689	downheap ((WT *)timers, timercnt, w->active - 1);	1099	downheap ((WT *)timers, timercnt, w->active - 1);
690	}	1100	}
691		1101
692	w->at = w->repeat;	1102	w->at = w->repeat;
693		1103
694	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
695	}	1105	}
696		1106
697	void	1107	void
698	evtimer_again (struct ev_timer *w)	1108	ev_timer_again (EV_P_ struct ev_timer *w)
699	{	1109	{
700	if (ev_is_active (w))	1110	if (ev_is_active (w))
701	{	1111	{
702	if (w->repeat)	1112	if (w->repeat)
703	{	1113	{
704	w->at = now + w->repeat;	1114	w->at = mn_now + w->repeat;
705	downheap ((WT *)timers, timercnt, w->active - 1);	1115	downheap ((WT *)timers, timercnt, w->active - 1);
706	}	1116	}
707	else	1117	else
708	evtimer_stop (w);	1118	ev_timer_stop (EV_A_ w);
709	}	1119	}
710	else if (w->repeat)	1120	else if (w->repeat)
711	evtimer_start (w);	1121	ev_timer_start (EV_A_ w);
712	}	1122	}
713		1123
714	void	1124	void
715	evperiodic_start (struct ev_periodic *w)	1125	ev_periodic_start (EV_P_ struct ev_periodic *w)
716	{	1126	{
717	if (ev_is_active (w))	1127	if (ev_is_active (w))
718	return;	1128	return;
719		1129
720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1130	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
721		1131
722	/* 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 */
723	if (w->interval)	1133	if (w->interval)
724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1134	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
725		1135
726	ev_start ((W)w, ++periodiccnt);	1136	ev_start (EV_A_ (W)w, ++periodiccnt);
727	array_needsize (periodics, periodicmax, periodiccnt, );	1137	array_needsize (periodics, periodicmax, periodiccnt, );
728	periodics [periodiccnt - 1] = w;	1138	periodics [periodiccnt - 1] = w;
729	upheap ((WT *)periodics, periodiccnt - 1);	1139	upheap ((WT *)periodics, periodiccnt - 1);
730	}	1140	}
731		1141
732	void	1142	void
733	evperiodic_stop (struct ev_periodic *w)	1143	ev_periodic_stop (EV_P_ struct ev_periodic *w)
734	{	1144	{
735	ev_clear ((W)w);	1145	ev_clear_pending (EV_A_ (W)w);
736	if (!ev_is_active (w))	1146	if (!ev_is_active (w))
737	return;	1147	return;
738		1148
739	if (w->active < periodiccnt--)	1149	if (w->active < periodiccnt--)
740	{	1150	{
741	periodics [w->active - 1] = periodics [periodiccnt];	1151	periodics [w->active - 1] = periodics [periodiccnt];
742	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1152	downheap ((WT *)periodics, periodiccnt, w->active - 1);
743	}	1153	}
744		1154
745	ev_stop ((W)w);	1155	ev_stop (EV_A_ (W)w);
746	}	1156	}
747		1157
748	void	1158	void
749	evsignal_start (struct ev_signal *w)	1159	ev_idle_start (EV_P_ struct ev_idle *w)
750	{	1160	{
751	if (ev_is_active (w))	1161	if (ev_is_active (w))
752	return;	1162	return;
753		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
754	ev_start ((W)w, 1);	1239	ev_start (EV_A_ (W)w, 1);
755	array_needsize (signals, signalmax, w->signum, signals_init);	1240	array_needsize (signals, signalmax, w->signum, signals_init);
756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1241	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
757		1242
758	if (!w->next)	1243	if (!w->next)
759	{	1244	{
760	struct sigaction sa;	1245	struct sigaction sa;
761	sa.sa_handler = sighandler;	1246	sa.sa_handler = sighandler;
762	sigfillset (&sa.sa_mask);	1247	sigfillset (&sa.sa_mask);
763	sa.sa_flags = 0;	1248	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
764	sigaction (w->signum, &sa, 0);	1249	sigaction (w->signum, &sa, 0);
765	}	1250	}
766	}	1251	}
767		1252
768	void	1253	void
769	evsignal_stop (struct ev_signal *w)	1254	ev_signal_stop (EV_P_ struct ev_signal *w)
770	{	1255	{
771	ev_clear ((W)w);	1256	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1257	if (!ev_is_active (w))
773	return;	1258	return;
774		1259
775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1260	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
776	ev_stop ((W)w);	1261	ev_stop (EV_A_ (W)w);
777		1262
778	if (!signals [w->signum - 1].head)	1263	if (!signals [w->signum - 1].head)
779	signal (w->signum, SIG_DFL);	1264	signal (w->signum, SIG_DFL);
780	}	1265	}
781		1266
782	void evidle_start (struct ev_idle *w)	1267	void
		1268	ev_child_start (EV_P_ struct ev_child *w)
783	{	1269	{
		1270	#if EV_MULTIPLICITY
		1271	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1272	#endif
784	if (ev_is_active (w))	1273	if (ev_is_active (w))
785	return;	1274	return;
786		1275
787	ev_start ((W)w, ++idlecnt);	1276	ev_start (EV_A_ (W)w, 1);
788	array_needsize (idles, idlemax, idlecnt, );	1277	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
789	idles [idlecnt - 1] = w;
790	}	1278	}
791		1279
792	void evidle_stop (struct ev_idle *w)	1280	void
		1281	ev_child_stop (EV_P_ struct ev_child *w)
793	{	1282	{
794	ev_clear ((W)w);	1283	ev_clear_pending (EV_A_ (W)w);
795	if (ev_is_active (w))	1284	if (ev_is_active (w))
796	return;	1285	return;
797		1286
798	idles [w->active - 1] = idles [--idlecnt];	1287	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
799	ev_stop ((W)w);	1288	ev_stop (EV_A_ (W)w);
800	}
801
802	void evcheck_start (struct ev_check *w)
803	{
804	if (ev_is_active (w))
805	return;
806
807	ev_start ((W)w, ++checkcnt);
808	array_needsize (checks, checkmax, checkcnt, );
809	checks [checkcnt - 1] = w;
810	}
811
812	void evcheck_stop (struct ev_check *w)
813	{
814	ev_clear ((W)w);
815	if (ev_is_active (w))
816	return;
817
818	checks [w->active - 1] = checks [--checkcnt];
819	ev_stop ((W)w);
820	}	1289	}
821		1290
822	/*****************************************************************************/	1291	/*****************************************************************************/
823		1292
824	struct ev_once	1293	struct ev_once
…		…
828	void (cb)(int revents, void arg);	1297	void (cb)(int revents, void arg);
829	void *arg;	1298	void *arg;
830	};	1299	};
831		1300
832	static void	1301	static void
833	once_cb (struct ev_once *once, int revents)	1302	once_cb (EV_P_ struct ev_once *once, int revents)
834	{	1303	{
835	void (cb)(int revents, void arg) = once->cb;	1304	void (cb)(int revents, void arg) = once->cb;
836	void *arg = once->arg;	1305	void *arg = once->arg;
837		1306
838	evio_stop (&once->io);	1307	ev_io_stop (EV_A_ &once->io);
839	evtimer_stop (&once->to);	1308	ev_timer_stop (EV_A_ &once->to);
840	free (once);	1309	free (once);
841		1310
842	cb (revents, arg);	1311	cb (revents, arg);
843	}	1312	}
844		1313
845	static void	1314	static void
846	once_cb_io (struct ev_io *w, int revents)	1315	once_cb_io (EV_P_ struct ev_io *w, int revents)
847	{	1316	{
848	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1317	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
849	}	1318	}
850		1319
851	static void	1320	static void
852	once_cb_to (struct ev_timer *w, int revents)	1321	once_cb_to (EV_P_ struct ev_timer *w, int revents)
853	{	1322	{
854	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1323	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
855	}	1324	}
856		1325
857	void	1326	void
858	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1327	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
859	{	1328	{
860	struct ev_once *once = malloc (sizeof (struct ev_once));	1329	struct ev_once *once = malloc (sizeof (struct ev_once));
861		1330
862	if (!once)	1331	if (!once)
863	cb (EV_ERROR, arg);	1332	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
864	else	1333	else
865	{	1334	{
866	once->cb = cb;	1335	once->cb = cb;
867	once->arg = arg;	1336	once->arg = arg;
868		1337
869	evw_init (&once->io, once_cb_io);	1338	ev_watcher_init (&once->io, once_cb_io);
870
871	if (fd >= 0)	1339	if (fd >= 0)
872	{	1340	{
873	evio_set (&once->io, fd, events);	1341	ev_io_set (&once->io, fd, events);
874	evio_start (&once->io);	1342	ev_io_start (EV_A_ &once->io);
875	}	1343	}
876		1344
877	evw_init (&once->to, once_cb_to);	1345	ev_watcher_init (&once->to, once_cb_to);
878
879	if (timeout >= 0.)	1346	if (timeout >= 0.)
880	{	1347	{
881	evtimer_set (&once->to, timeout, 0.);	1348	ev_timer_set (&once->to, timeout, 0.);
882	evtimer_start (&once->to);	1349	ev_timer_start (EV_A_ &once->to);
883	}	1350	}
884	}	1351	}
885	}	1352	}
886		1353
887	/*****************************************************************************/
888
889	#if 0
890
891	struct ev_io wio;
892
893	static void
894	sin_cb (struct ev_io *w, int revents)
895	{
896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
897	}
898
899	static void
900	ocb (struct ev_timer *w, int revents)
901	{
902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
903	evtimer_stop (w);
904	evtimer_start (w);
905	}
906
907	static void
908	scb (struct ev_signal *w, int revents)
909	{
910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
911	evio_stop (&wio);
912	evio_start (&wio);
913	}
914
915	static void
916	gcb (struct ev_signal *w, int revents)
917	{
918	fprintf (stderr, "generic %x\n", revents);
919
920	}
921
922	int main (void)
923	{
924	ev_init (0);
925
926	evio_init (&wio, sin_cb, 0, EV_READ);
927	evio_start (&wio);
928
929	struct ev_timer t[10000];
930
931	#if 0
932	int i;
933	for (i = 0; i < 10000; ++i)
934	{
935	struct ev_timer *w = t + i;
936	evw_init (w, ocb, i);
937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
938	evtimer_start (w);
939	if (drand48 () < 0.5)
940	evtimer_stop (w);
941	}
942	#endif
943
944	struct ev_timer t1;
945	evtimer_init (&t1, ocb, 5, 10);
946	evtimer_start (&t1);
947
948	struct ev_signal sig;
949	evsignal_init (&sig, scb, SIGQUIT);
950	evsignal_start (&sig);
951
952	struct ev_check cw;
953	evcheck_init (&cw, gcb);
954	evcheck_start (&cw);
955
956	struct ev_idle iw;
957	evidle_init (&iw, gcb);
958	evidle_start (&iw);
959
960	ev_loop (0);
961
962	return 0;
963	}
964
965	#endif
966
967
968
969

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Comparing libev/ev.c (file contents): Revision 1.16 by root, Wed Oct 31 13:57:34 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 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.56 by root, Sun Nov 4 15:58:49 2007 UTC