[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 1.70 by root, Tue Nov 6 00:52:32 2007 UTC

…		…
		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
		55	#endif
		56
1	#include <math.h>	57	#include <math.h>
2	#include <stdlib.h>	58	#include <stdlib.h>
3	#include <unistd.h>	59	#include <unistd.h>
4	#include <fcntl.h>	60	#include <fcntl.h>
5	#include <signal.h>	61	#include <signal.h>
		62	#include <stddef.h>
6		63
7	#include <stdio.h>	64	#include <stdio.h>
8		65
9	#include <assert.h>	66	#include <assert.h>
10	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
11	#include <sys/time.h>	72	#include <sys/time.h>
12	#include <time.h>	73	#include <time.h>
13		74
14	#define HAVE_EPOLL 1	75	/**/
15		76
16	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
17	# ifdef CLOCK_MONOTONIC
18	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
19	# endif	102	# endif
20	#endif	103	#endif
21		104
22	#ifndef HAVE_SELECT
23	# define HAVE_SELECT 1
24	#endif
25
26	#ifndef HAVE_EPOLL
27	# define HAVE_EPOLL 0
28	#endif
29
30	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
32	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
33		122
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/#define CLEANUP_INTERVAL 300. / how often to try to free memory and re-check fds */
36		127
37	#include "ev.h"	128	#include "ev.h"
38		129
39	struct ev_watcher {	130	#if __GNUC__ >= 3
40	EV_WATCHER (ev_watcher);	131	# define expect(expr,value) __builtin_expect ((expr),(value))
41	};	132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
42		137
43	struct ev_watcher_list {	138	#define expect_false(expr) expect ((expr) != 0, 0)
44	EV_WATCHER_LIST (ev_watcher_list);	139	#define expect_true(expr) expect ((expr) != 0, 1)
45	};
46		140
47	struct ev_watcher_time {	141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48	EV_WATCHER_TIME (ev_watcher_time);	142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49	};
50		143
51	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
52	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
53	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
54		147
55	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
56	ev_tstamp ev_now;
57	int ev_method;
58		149
59	static int have_monotonic; /* runtime */	150	#if WIN32
60		151	/* note: the comment below could not be substantiated, but what would I care */
61	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
62	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
63	static void (*method_poll)(ev_tstamp timeout);	154	#endif
64		155
65	/*****************************************************************************/	156	/*****************************************************************************/
66		157
67	ev_tstamp	158	static void (syserr_cb)(const char msg);
		159
		160	void ev_set_syserr_cb (void (cb)(const char msg))
		161	{
		162	syserr_cb = cb;
		163	}
		164
		165	static void
		166	syserr (const char *msg)
		167	{
		168	if (!msg)
		169	msg = "(libev) system error";
		170
		171	if (syserr_cb)
		172	syserr_cb (msg);
		173	else
		174	{
		175	perror (msg);
		176	abort ();
		177	}
		178	}
		179
		180	static void (alloc)(void *ptr, long size);
		181
		182	void ev_set_allocator (void (cb)(void *ptr, long size))
		183	{
		184	alloc = cb;
		185	}
		186
		187	static void *
		188	ev_realloc (void *ptr, long size)
		189	{
		190	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		191
		192	if (!ptr && size)
		193	{
		194	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		195	abort ();
		196	}
		197
		198	return ptr;
		199	}
		200
		201	#define ev_malloc(size) ev_realloc (0, (size))
		202	#define ev_free(ptr) ev_realloc ((ptr), 0)
		203
		204	/*****************************************************************************/
		205
		206	typedef struct
		207	{
		208	WL head;
		209	unsigned char events;
		210	unsigned char reify;
		211	} ANFD;
		212
		213	typedef struct
		214	{
		215	W w;
		216	int events;
		217	} ANPENDING;
		218
		219	#if EV_MULTIPLICITY
		220
		221	struct ev_loop
		222	{
		223	# define VAR(name,decl) decl;
		224	# include "ev_vars.h"
		225	};
		226	# undef VAR
		227	# include "ev_wrap.h"
		228
		229	#else
		230
		231	# define VAR(name,decl) static decl;
		232	# include "ev_vars.h"
		233	# undef VAR
		234
		235	#endif
		236
		237	/*****************************************************************************/
		238
		239	inline ev_tstamp
68	ev_time (void)	240	ev_time (void)
69	{	241	{
70	#if HAVE_REALTIME	242	#if EV_USE_REALTIME
71	struct timespec ts;	243	struct timespec ts;
72	clock_gettime (CLOCK_REALTIME, &ts);	244	clock_gettime (CLOCK_REALTIME, &ts);
73	return ts.tv_sec + ts.tv_nsec * 1e-9;	245	return ts.tv_sec + ts.tv_nsec * 1e-9;
74	#else	246	#else
75	struct timeval tv;	247	struct timeval tv;
76	gettimeofday (&tv, 0);	248	gettimeofday (&tv, 0);
77	return tv.tv_sec + tv.tv_usec * 1e-6;	249	return tv.tv_sec + tv.tv_usec * 1e-6;
78	#endif	250	#endif
79	}	251	}
80		252
81	static ev_tstamp	253	inline ev_tstamp
82	get_clock (void)	254	get_clock (void)
83	{	255	{
84	#if HAVE_MONOTONIC	256	#if EV_USE_MONOTONIC
85	if (have_monotonic)	257	if (expect_true (have_monotonic))
86	{	258	{
87	struct timespec ts;	259	struct timespec ts;
88	clock_gettime (CLOCK_MONOTONIC, &ts);	260	clock_gettime (CLOCK_MONOTONIC, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	261	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	}	262	}
91	#endif	263	#endif
92		264
93	return ev_time ();	265	return ev_time ();
94	}	266	}
95		267
		268	ev_tstamp
		269	ev_now (EV_P)
		270	{
		271	return rt_now;
		272	}
		273
		274	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		275
96	#define array_needsize(base,cur,cnt,init) \	276	#define array_needsize(base,cur,cnt,init) \
97	if ((cnt) > cur) \	277	if (expect_false ((cnt) > cur)) \
98	{ \	278	{ \
99	int newcnt = cur ? cur << 1 : 16; \	279	int newcnt = cur; \
100	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	280	do \
		281	{ \
		282	newcnt = array_roundsize (base, newcnt << 1); \
		283	} \
		284	while ((cnt) > newcnt); \
		285	\
101	base = realloc (base, sizeof (base) (newcnt)); \	286	base = ev_realloc (base, sizeof (base) (newcnt)); \
102	init (base + cur, newcnt - cur); \	287	init (base + cur, newcnt - cur); \
103	cur = newcnt; \	288	cur = newcnt; \
104	}	289	}
		290
		291	#define array_slim(stem) \
		292	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		293	{ \
		294	stem ## max = array_roundsize (stem ## cnt >> 1); \
		295	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		296	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		297	}
		298
		299	#define array_free(stem, idx) \
		300	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
105		301
106	/*****************************************************************************/	302	/*****************************************************************************/
107		303
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	304	static void
121	anfds_init (ANFD *base, int count)	305	anfds_init (ANFD *base, int count)
122	{	306	{
123	while (count--)	307	while (count--)
124	{	308	{
125	base->head = 0;	309	base->head = 0;
126	base->wev = base->rev = EV_NONE;	310	base->events = EV_NONE;
		311	base->reify = 0;
		312
127	++base;	313	++base;
128	}	314	}
129	}	315	}
130		316
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	317	static void
141	event (W w, int events)	318	event (EV_P_ W w, int events)
142	{	319	{
		320	if (w->pending)
		321	{
		322	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		323	return;
		324	}
		325
143	w->pending = ++pendingcnt;	326	w->pending = ++pendingcnt [ABSPRI (w)];
144	array_needsize (pendings, pendingmax, pendingcnt, );	327	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
145	pendings [pendingcnt - 1].w = w;	328	pendings [ABSPRI (w)][w->pending - 1].w = w;
146	pendings [pendingcnt - 1].events = events;	329	pendings [ABSPRI (w)][w->pending - 1].events = events;
147	}	330	}
148		331
149	static void	332	static void
		333	queue_events (EV_P_ W *events, int eventcnt, int type)
		334	{
		335	int i;
		336
		337	for (i = 0; i < eventcnt; ++i)
		338	event (EV_A_ events [i], type);
		339	}
		340
		341	static void
150	fd_event (int fd, int events)	342	fd_event (EV_P_ int fd, int events)
151	{	343	{
152	ANFD *anfd = anfds + fd;	344	ANFD *anfd = anfds + fd;
153	struct ev_io *w;	345	struct ev_io *w;
154		346
155	for (w = anfd->head; w; w = w->next)	347	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
156	{	348	{
157	int ev = w->events & events;	349	int ev = w->events & events;
158		350
159	if (ev)	351	if (ev)
160	event ((W)w, ev);	352	event (EV_A_ (W)w, ev);
161	}	353	}
162	}	354	}
163		355
		356	/*****************************************************************************/
		357
164	static void	358	static void
165	queue_events (W *events, int eventcnt, int type)	359	fd_reify (EV_P)
166	{	360	{
167	int i;	361	int i;
168		362
169	for (i = 0; i < eventcnt; ++i)	363	for (i = 0; i < fdchangecnt; ++i)
170	event (events [i], type);	364	{
		365	int fd = fdchanges [i];
		366	ANFD *anfd = anfds + fd;
		367	struct ev_io *w;
		368
		369	int events = 0;
		370
		371	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		372	events \|= w->events;
		373
		374	anfd->reify = 0;
		375
		376	method_modify (EV_A_ fd, anfd->events, events);
		377	anfd->events = events;
		378	}
		379
		380	fdchangecnt = 0;
		381	}
		382
		383	static void
		384	fd_change (EV_P_ int fd)
		385	{
		386	if (anfds [fd].reify)
		387	return;
		388
		389	anfds [fd].reify = 1;
		390
		391	++fdchangecnt;
		392	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		393	fdchanges [fdchangecnt - 1] = fd;
		394	}
		395
		396	static void
		397	fd_kill (EV_P_ int fd)
		398	{
		399	struct ev_io *w;
		400
		401	while ((w = (struct ev_io *)anfds [fd].head))
		402	{
		403	ev_io_stop (EV_A_ w);
		404	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		405	}
		406	}
		407
		408	/* called on EBADF to verify fds */
		409	static void
		410	fd_ebadf (EV_P)
		411	{
		412	int fd;
		413
		414	for (fd = 0; fd < anfdmax; ++fd)
		415	if (anfds [fd].events)
		416	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		417	fd_kill (EV_A_ fd);
		418	}
		419
		420	/* called on ENOMEM in select/poll to kill some fds and retry */
		421	static void
		422	fd_enomem (EV_P)
		423	{
		424	int fd;
		425
		426	for (fd = anfdmax; fd--; )
		427	if (anfds [fd].events)
		428	{
		429	fd_kill (EV_A_ fd);
		430	return;
		431	}
		432	}
		433
		434	/* usually called after fork if method needs to re-arm all fds from scratch */
		435	static void
		436	fd_rearm_all (EV_P)
		437	{
		438	int fd;
		439
		440	/* this should be highly optimised to not do anything but set a flag */
		441	for (fd = 0; fd < anfdmax; ++fd)
		442	if (anfds [fd].events)
		443	{
		444	anfds [fd].events = 0;
		445	fd_change (EV_A_ fd);
		446	}
171	}	447	}
172		448
173	/*****************************************************************************/	449	/*****************************************************************************/
174		450
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	451	static void
182	upheap (WT *timers, int k)	452	upheap (WT *heap, int k)
183	{	453	{
184	WT w = timers [k];	454	WT w = heap [k];
185		455
186	while (k && timers [k >> 1]->at > w->at)	456	while (k && heap [k >> 1]->at > w->at)
187	{	457	{
188	timers [k] = timers [k >> 1];	458	heap [k] = heap [k >> 1];
189	timers [k]->active = k + 1;	459	((W)heap [k])->active = k + 1;
190	k >>= 1;	460	k >>= 1;
191	}	461	}
192		462
193	timers [k] = w;	463	heap [k] = w;
194	timers [k]->active = k + 1;	464	((W)heap [k])->active = k + 1;
195		465
196	}	466	}
197		467
198	static void	468	static void
199	downheap (WT *timers, int N, int k)	469	downheap (WT *heap, int N, int k)
200	{	470	{
201	WT w = timers [k];	471	WT w = heap [k];
202		472
203	while (k < (N >> 1))	473	while (k < (N >> 1))
204	{	474	{
205	int j = k << 1;	475	int j = k << 1;
206		476
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	477	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208	++j;	478	++j;
209		479
210	if (w->at <= timers [j]->at)	480	if (w->at <= heap [j]->at)
211	break;	481	break;
212		482
213	timers [k] = timers [j];	483	heap [k] = heap [j];
214	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
215	k = j;	485	k = j;
216	}	486	}
217		487
218	timers [k] = w;	488	heap [k] = w;
219	timers [k]->active = k + 1;	489	((W)heap [k])->active = k + 1;
220	}	490	}
221		491
222	/*****************************************************************************/	492	/*****************************************************************************/
223		493
224	typedef struct	494	typedef struct
225	{	495	{
226	struct ev_signal *head;	496	WL head;
227	sig_atomic_t gotsig;	497	sig_atomic_t volatile gotsig;
228	} ANSIG;	498	} ANSIG;
229		499
230	static ANSIG *signals;	500	static ANSIG *signals;
231	static int signalmax;	501	static int signalmax;
232		502
233	static int sigpipe [2];	503	static int sigpipe [2];
234	static sig_atomic_t gotsig;	504	static sig_atomic_t volatile gotsig;
235	static struct ev_io sigev;	505	static struct ev_io sigev;
236		506
237	static void	507	static void
238	signals_init (ANSIG *base, int count)	508	signals_init (ANSIG *base, int count)
239	{	509	{
240	while (count--)	510	while (count--)
241	{	511	{
242	base->head = 0;	512	base->head = 0;
243	base->gotsig = 0;	513	base->gotsig = 0;
		514
244	++base;	515	++base;
245	}	516	}
246	}	517	}
247		518
248	static void	519	static void
249	sighandler (int signum)	520	sighandler (int signum)
250	{	521	{
		522	#if WIN32
		523	signal (signum, sighandler);
		524	#endif
		525
251	signals [signum - 1].gotsig = 1;	526	signals [signum - 1].gotsig = 1;
252		527
253	if (!gotsig)	528	if (!gotsig)
254	{	529	{
		530	int old_errno = errno;
255	gotsig = 1;	531	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	532	write (sigpipe [1], &signum, 1);
		533	errno = old_errno;
257	}	534	}
258	}	535	}
259		536
260	static void	537	static void
261	sigcb (struct ev_io *iow, int revents)	538	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	539	{
263	struct ev_signal *w;	540	WL w;
264	int sig;	541	int signum;
265		542
		543	read (sigpipe [0], &revents, 1);
266	gotsig = 0;	544	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		545
269	for (sig = signalmax; sig--; )	546	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	547	if (signals [signum].gotsig)
271	{	548	{
272	signals [sig].gotsig = 0;	549	signals [signum].gotsig = 0;
273		550
274	for (w = signals [sig].head; w; w = w->next)	551	for (w = signals [signum].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);	552	event (EV_A_ (W)w, EV_SIGNAL);
276	}	553	}
277	}	554	}
278		555
279	static void	556	static void
280	siginit (void)	557	siginit (EV_P)
281	{	558	{
		559	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	560	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	561	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		562
285	/* rather than sort out wether we really need nb, set it */	563	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	564	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	565	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		566	#endif
288		567
289	evio_set (&sigev, sigpipe [0], EV_READ);	568	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	569	ev_io_start (EV_A_ &sigev);
		570	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	571	}
292		572
293	/*****************************************************************************/	573	/*****************************************************************************/
294		574
295	static struct ev_idle **idles;	575	#ifndef WIN32
296	static int idlemax, idlecnt;
297		576
298	static struct ev_check **checks;	577	static struct ev_child *childs [PID_HASHSIZE];
299	static int checkmax, checkcnt;	578	static struct ev_signal childev;
		579
		580	#ifndef WCONTINUED
		581	# define WCONTINUED 0
		582	#endif
		583
		584	static void
		585	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		586	{
		587	struct ev_child *w;
		588
		589	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		590	if (w->pid == pid \|\| !w->pid)
		591	{
		592	ev_priority (w) = ev_priority (sw); /* need to do it now */
		593	w->rpid = pid;
		594	w->rstatus = status;
		595	event (EV_A_ (W)w, EV_CHILD);
		596	}
		597	}
		598
		599	static void
		600	childcb (EV_P_ struct ev_signal *sw, int revents)
		601	{
		602	int pid, status;
		603
		604	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		605	{
		606	/* make sure we are called again until all childs have been reaped */
		607	event (EV_A_ (W)sw, EV_SIGNAL);
		608
		609	child_reap (EV_A_ sw, pid, pid, status);
		610	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		611	}
		612	}
		613
		614	#endif
300		615
301	/*****************************************************************************/	616	/*****************************************************************************/
302		617
		618	#if EV_USE_KQUEUE
		619	# include "ev_kqueue.c"
		620	#endif
303	#if HAVE_EPOLL	621	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	622	# include "ev_epoll.c"
305	#endif	623	#endif
		624	#if EV_USE_POLL
		625	# include "ev_poll.c"
		626	#endif
306	#if HAVE_SELECT	627	#if EV_USE_SELECT
307	# include "ev_select.c"	628	# include "ev_select.c"
308	#endif	629	#endif
309		630
310	int ev_init (int flags)	631	int
		632	ev_version_major (void)
311	{	633	{
		634	return EV_VERSION_MAJOR;
		635	}
		636
		637	int
		638	ev_version_minor (void)
		639	{
		640	return EV_VERSION_MINOR;
		641	}
		642
		643	/* return true if we are running with elevated privileges and should ignore env variables */
		644	static int
		645	enable_secure (void)
		646	{
		647	#ifdef WIN32
		648	return 0;
		649	#else
		650	return getuid () != geteuid ()
		651	\|\| getgid () != getegid ();
		652	#endif
		653	}
		654
		655	int
		656	ev_method (EV_P)
		657	{
		658	return method;
		659	}
		660
		661	static void
		662	loop_init (EV_P_ int methods)
		663	{
		664	if (!method)
		665	{
312	#if HAVE_MONOTONIC	666	#if EV_USE_MONOTONIC
313	{	667	{
314	struct timespec ts;	668	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	669	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	670	have_monotonic = 1;
317	}	671	}
318	#endif	672	#endif
319		673
320	ev_now = ev_time ();	674	rt_now = ev_time ();
321	now = get_clock ();	675	mn_now = get_clock ();
322	diff = ev_now - now;	676	now_floor = mn_now;
		677	rtmn_diff = rt_now - mn_now;
323		678
		679	if (methods == EVMETHOD_AUTO)
		680	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		681	methods = atoi (getenv ("LIBEV_METHODS"));
		682	else
		683	methods = EVMETHOD_ANY;
		684
		685	method = 0;
		686	#if EV_USE_WIN32
		687	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		688	#endif
		689	#if EV_USE_KQUEUE
		690	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		691	#endif
		692	#if EV_USE_EPOLL
		693	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		694	#endif
		695	#if EV_USE_POLL
		696	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		697	#endif
		698	#if EV_USE_SELECT
		699	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		700	#endif
		701
		702	ev_watcher_init (&sigev, sigcb);
		703	ev_set_priority (&sigev, EV_MAXPRI);
		704	}
		705	}
		706
		707	void
		708	loop_destroy (EV_P)
		709	{
		710	int i;
		711
		712	#if EV_USE_WIN32
		713	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		714	#endif
		715	#if EV_USE_KQUEUE
		716	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		717	#endif
		718	#if EV_USE_EPOLL
		719	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		720	#endif
		721	#if EV_USE_POLL
		722	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		723	#endif
		724	#if EV_USE_SELECT
		725	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		726	#endif
		727
		728	for (i = NUMPRI; i--; )
		729	array_free (pending, [i]);
		730
		731	array_free (fdchange, );
		732	array_free (timer, );
		733	array_free (periodic, );
		734	array_free (idle, );
		735	array_free (prepare, );
		736	array_free (check, );
		737
		738	method = 0;
		739	}
		740
		741	static void
		742	loop_fork (EV_P)
		743	{
		744	#if EV_USE_EPOLL
		745	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		746	#endif
		747	#if EV_USE_KQUEUE
		748	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		749	#endif
		750
		751	if (ev_is_active (&sigev))
		752	{
		753	/* default loop */
		754
		755	ev_ref (EV_A);
		756	ev_io_stop (EV_A_ &sigev);
		757	close (sigpipe [0]);
		758	close (sigpipe [1]);
		759
		760	while (pipe (sigpipe))
		761	syserr ("(libev) error creating pipe");
		762
		763	siginit (EV_A);
		764	}
		765
		766	postfork = 0;
		767	}
		768
		769	#if EV_MULTIPLICITY
		770	struct ev_loop *
		771	ev_loop_new (int methods)
		772	{
		773	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		774
		775	memset (loop, 0, sizeof (struct ev_loop));
		776
		777	loop_init (EV_A_ methods);
		778
		779	if (ev_method (EV_A))
		780	return loop;
		781
		782	return 0;
		783	}
		784
		785	void
		786	ev_loop_destroy (EV_P)
		787	{
		788	loop_destroy (EV_A);
		789	ev_free (loop);
		790	}
		791
		792	void
		793	ev_loop_fork (EV_P)
		794	{
		795	postfork = 1;
		796	}
		797
		798	#endif
		799
		800	#if EV_MULTIPLICITY
		801	struct ev_loop default_loop_struct;
		802	static struct ev_loop *default_loop;
		803
		804	struct ev_loop *
		805	#else
		806	static int default_loop;
		807
		808	int
		809	#endif
		810	ev_default_loop (int methods)
		811	{
		812	if (sigpipe [0] == sigpipe [1])
324	if (pipe (sigpipe))	813	if (pipe (sigpipe))
325	return 0;	814	return 0;
326		815
327	ev_method = EVMETHOD_NONE;	816	if (!default_loop)
328	#if HAVE_EPOLL	817	{
329	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	818	#if EV_MULTIPLICITY
		819	struct ev_loop *loop = default_loop = &default_loop_struct;
		820	#else
		821	default_loop = 1;
330	#endif	822	#endif
331	#if HAVE_SELECT
332	if (ev_method == EVMETHOD_NONE) select_init (flags);
333	#endif
334		823
		824	loop_init (EV_A_ methods);
		825
		826	if (ev_method (EV_A))
		827	{
		828	siginit (EV_A);
		829
		830	#ifndef WIN32
		831	ev_signal_init (&childev, childcb, SIGCHLD);
		832	ev_set_priority (&childev, EV_MAXPRI);
		833	ev_signal_start (EV_A_ &childev);
		834	ev_unref (EV_A); /* child watcher should not keep loop alive */
		835	#endif
		836	}
		837	else
		838	default_loop = 0;
		839	}
		840
		841	return default_loop;
		842	}
		843
		844	void
		845	ev_default_destroy (void)
		846	{
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *loop = default_loop;
		849	#endif
		850
		851	ev_ref (EV_A); /* child watcher */
		852	ev_signal_stop (EV_A_ &childev);
		853
		854	ev_ref (EV_A); /* signal watcher */
		855	ev_io_stop (EV_A_ &sigev);
		856
		857	close (sigpipe [0]); sigpipe [0] = 0;
		858	close (sigpipe [1]); sigpipe [1] = 0;
		859
		860	loop_destroy (EV_A);
		861	}
		862
		863	void
		864	ev_default_fork (void)
		865	{
		866	#if EV_MULTIPLICITY
		867	struct ev_loop *loop = default_loop;
		868	#endif
		869
335	if (ev_method)	870	if (method)
336	{	871	postfork = 1;
337	evw_init (&sigev, sigcb);
338	siginit ();
339	}
340
341	return ev_method;
342	}	872	}
343		873
344	/*****************************************************************************/	874	/*****************************************************************************/
345		875
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
362
363	evio_stop (&sigev);
364	close (sigpipe [0]);
365	close (sigpipe [1]);
366	pipe (sigpipe);
367	siginit ();
368	}
369
370	/*****************************************************************************/
371
372	static void	876	static void
373	fd_reify (void)	877	call_pending (EV_P)
374	{	878	{
375	int i;	879	int pri;
376		880
377	for (i = 0; i < fdchangecnt; ++i)	881	for (pri = NUMPRI; pri--; )
378	{	882	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	{	883	{
390	method_modify (fd, anfd->wev, wev);	884	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391	anfd->wev = wev;
392	}
393	}
394		885
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)	886	if (p->w)
408	{	887	{
409	p->w->pending = 0;	888	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	889	p->w->cb (EV_A_ p->w, p->events);
411	}	890	}
412	}	891	}
413
414	pendingcnt = 0;
415	}	892	}
416		893
417	static void	894	static void
418	timers_reify ()	895	timers_reify (EV_P)
419	{	896	{
420	while (timercnt && timers [0]->at <= now)	897	while (timercnt && ((WT)timers [0])->at <= mn_now)
421	{	898	{
422	struct ev_timer *w = timers [0];	899	struct ev_timer *w = timers [0];
		900
		901	assert (("inactive timer on timer heap detected", ev_is_active (w)));
423		902
424	/* first reschedule or stop timer */	903	/* first reschedule or stop timer */
425	if (w->repeat)	904	if (w->repeat)
426	{	905	{
		906	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	907	((WT)w)->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	908	downheap ((WT *)timers, timercnt, 0);
430	}	909	}
431	else	910	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	911	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		912
434	event ((W)w, EV_TIMEOUT);	913	event (EV_A_ (W)w, EV_TIMEOUT);
435	}	914	}
436	}	915	}
437		916
438	static void	917	static void
439	periodics_reify ()	918	periodics_reify (EV_P)
440	{	919	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	920	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
442	{	921	{
443	struct ev_periodic *w = periodics [0];	922	struct ev_periodic *w = periodics [0];
		923
		924	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
444		925
445	/* first reschedule or stop timer */	926	/* first reschedule or stop timer */
446	if (w->interval)	927	if (w->interval)
447	{	928	{
448	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	929	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
449	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	930	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
450	downheap ((WT *)periodics, periodiccnt, 0);	931	downheap ((WT *)periodics, periodiccnt, 0);
451	}	932	}
452	else	933	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	934	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		935
455	event ((W)w, EV_TIMEOUT);	936	event (EV_A_ (W)w, EV_PERIODIC);
456	}	937	}
457	}	938	}
458		939
459	static void	940	static void
460	time_jump (ev_tstamp diff)	941	periodics_reschedule (EV_P)
461	{	942	{
462	int i;	943	int i;
463		944
464	/* adjust periodics */	945	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	946	for (i = 0; i < periodiccnt; ++i)
466	{	947	{
467	struct ev_periodic *w = periodics [i];	948	struct ev_periodic *w = periodics [i];
468		949
469	if (w->interval)	950	if (w->interval)
470	{	951	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	952	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
472		953
473	if (fabs (diff) >= 1e-4)	954	if (fabs (diff) >= 1e-4)
474	{	955	{
475	evperiodic_stop (w);	956	ev_periodic_stop (EV_A_ w);
476	evperiodic_start (w);	957	ev_periodic_start (EV_A_ w);
477		958
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */	959	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	960	}
480	}	961	}
481	}	962	}
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	}	963	}
487		964
		965	inline int
		966	time_update_monotonic (EV_P)
		967	{
		968	mn_now = get_clock ();
		969
		970	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		971	{
		972	rt_now = rtmn_diff + mn_now;
		973	return 0;
		974	}
		975	else
		976	{
		977	now_floor = mn_now;
		978	rt_now = ev_time ();
		979	return 1;
		980	}
		981	}
		982
488	static void	983	static void
489	time_update ()	984	time_update (EV_P)
490	{	985	{
491	int i;	986	int i;
492		987
493	ev_now = ev_time ();	988	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	989	if (expect_true (have_monotonic))
496	{	990	{
497	ev_tstamp odiff = diff;	991	if (time_update_monotonic (EV_A))
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	992	{
501	now = get_clock ();	993	ev_tstamp odiff = rtmn_diff;
		994
		995	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		996	{
502	diff = ev_now - now;	997	rtmn_diff = rt_now - mn_now;
503		998
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	999	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	1000	return; /* all is well */
506		1001
507	ev_now = ev_time ();	1002	rt_now = ev_time ();
		1003	mn_now = get_clock ();
		1004	now_floor = mn_now;
		1005	}
		1006
		1007	periodics_reschedule (EV_A);
		1008	/* no timer adjustment, as the monotonic clock doesn't jump */
		1009	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
508	}	1010	}
509
510	time_jump (diff - odiff);
511	}	1011	}
512	else	1012	else
		1013	#endif
513	{	1014	{
514	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	1015	rt_now = ev_time ();
515	time_jump (ev_now - now);
516		1016
		1017	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		1018	{
		1019	periodics_reschedule (EV_A);
		1020
		1021	/* adjust timers. this is easy, as the offset is the same for all */
		1022	for (i = 0; i < timercnt; ++i)
		1023	((WT)timers [i])->at += rt_now - mn_now;
		1024	}
		1025
517	now = ev_now;	1026	mn_now = rt_now;
518	}	1027	}
519	}	1028	}
520		1029
521	int ev_loop_done;	1030	void
		1031	ev_ref (EV_P)
		1032	{
		1033	++activecnt;
		1034	}
522		1035
		1036	void
		1037	ev_unref (EV_P)
		1038	{
		1039	--activecnt;
		1040	}
		1041
		1042	static int loop_done;
		1043
		1044	void
523	void ev_loop (int flags)	1045	ev_loop (EV_P_ int flags)
524	{	1046	{
525	double block;	1047	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	1048	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		1049
534	do	1050	do
535	{	1051	{
		1052	/* queue check watchers (and execute them) */
		1053	if (expect_false (preparecnt))
		1054	{
		1055	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		1056	call_pending (EV_A);
		1057	}
		1058
		1059	/* we might have forked, so reify kernel state if necessary */
		1060	if (expect_false (postfork))
		1061	loop_fork (EV_A);
		1062
536	/* update fd-related kernel structures */	1063	/* update fd-related kernel structures */
537	fd_reify ();	1064	fd_reify (EV_A);
538		1065
539	/* calculate blocking time */	1066	/* calculate blocking time */
540		1067
541	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1068	/* we only need this for !monotonic clockor timers, but as we basically
		1069	always have timers, we just calculate it always */
		1070	#if EV_USE_MONOTONIC
		1071	if (expect_true (have_monotonic))
		1072	time_update_monotonic (EV_A);
		1073	else
		1074	#endif
		1075	{
542	ev_now = ev_time ();	1076	rt_now = ev_time ();
		1077	mn_now = rt_now;
		1078	}
543		1079
544	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1080	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
545	block = 0.;	1081	block = 0.;
546	else	1082	else
547	{	1083	{
548	block = MAX_BLOCKTIME;	1084	block = MAX_BLOCKTIME;
549		1085
550	if (timercnt)	1086	if (timercnt)
551	{	1087	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	1088	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
553	if (block > to) block = to;	1089	if (block > to) block = to;
554	}	1090	}
555		1091
556	if (periodiccnt)	1092	if (periodiccnt)
557	{	1093	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1094	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
559	if (block > to) block = to;	1095	if (block > to) block = to;
560	}	1096	}
561		1097
562	if (block < 0.) block = 0.;	1098	if (block < 0.) block = 0.;
563	}	1099	}
564		1100
565	method_poll (block);	1101	method_poll (EV_A_ block);
566		1102
567	/* update ev_now, do magic */	1103	/* update rt_now, do magic */
568	time_update ();	1104	time_update (EV_A);
569		1105
570	/* queue pending timers and reschedule them */	1106	/* queue pending timers and reschedule them */
		1107	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	1108	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		1109
574	/* queue idle watchers unless io or timers are pending */	1110	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	1111	if (!pendingcnt)
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	1112	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		1113
578	/* queue check and possibly idle watchers */	1114	/* queue check watchers, to be executed first */
		1115	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	1116	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		1117
581	call_pending ();	1118	call_pending (EV_A);
582	}	1119	}
583	while (!ev_loop_done);	1120	while (activecnt && !loop_done);
		1121
		1122	if (loop_done != 2)
		1123	loop_done = 0;
		1124	}
		1125
		1126	void
		1127	ev_unloop (EV_P_ int how)
		1128	{
		1129	loop_done = how;
584	}	1130	}
585		1131
586	/*****************************************************************************/	1132	/*****************************************************************************/
587		1133
588	static void	1134	inline void
589	wlist_add (WL *head, WL elem)	1135	wlist_add (WL *head, WL elem)
590	{	1136	{
591	elem->next = *head;	1137	elem->next = *head;
592	*head = elem;	1138	*head = elem;
593	}	1139	}
594		1140
595	static void	1141	inline void
596	wlist_del (WL *head, WL elem)	1142	wlist_del (WL *head, WL elem)
597	{	1143	{
598	while (*head)	1144	while (*head)
599	{	1145	{
600	if (*head == elem)	1146	if (*head == elem)
605		1151
606	head = &(*head)->next;	1152	head = &(*head)->next;
607	}	1153	}
608	}	1154	}
609		1155
610	static void	1156	inline void
		1157	ev_clear_pending (EV_P_ W w)
		1158	{
		1159	if (w->pending)
		1160	{
		1161	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1162	w->pending = 0;
		1163	}
		1164	}
		1165
		1166	inline void
611	ev_start (W w, int active)	1167	ev_start (EV_P_ W w, int active)
612	{	1168	{
613	w->pending = 0;	1169	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1170	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1171
614	w->active = active;	1172	w->active = active;
		1173	ev_ref (EV_A);
615	}	1174	}
616		1175
617	static void	1176	inline void
618	ev_stop (W w)	1177	ev_stop (EV_P_ W w)
619	{	1178	{
620	if (w->pending)	1179	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1180	w->active = 0;
624	}	1181	}
625		1182
626	/*****************************************************************************/	1183	/*****************************************************************************/
627		1184
628	void	1185	void
629	evio_start (struct ev_io *w)	1186	ev_io_start (EV_P_ struct ev_io *w)
630	{	1187	{
		1188	int fd = w->fd;
		1189
631	if (ev_is_active (w))	1190	if (ev_is_active (w))
632	return;	1191	return;
633		1192
634	int fd = w->fd;	1193	assert (("ev_io_start called with negative fd", fd >= 0));
635		1194
636	ev_start ((W)w, 1);	1195	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1196	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1197	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		1198
640	++fdchangecnt;	1199	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	1200	}
644		1201
645	void	1202	void
646	evio_stop (struct ev_io *w)	1203	ev_io_stop (EV_P_ struct ev_io *w)
647	{	1204	{
		1205	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	1206	if (!ev_is_active (w))
649	return;	1207	return;
650		1208
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1209	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	1210	ev_stop (EV_A_ (W)w);
653		1211
654	++fdchangecnt;	1212	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1213	}
658		1214
659
660	void	1215	void
661	evtimer_start (struct ev_timer *w)	1216	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1217	{
663	if (ev_is_active (w))	1218	if (ev_is_active (w))
664	return;	1219	return;
665		1220
666	w->at += now;	1221	((WT)w)->at += mn_now;
667		1222
		1223	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1224
668	ev_start ((W)w, ++timercnt);	1225	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1226	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;	1227	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1228	upheap ((WT *)timers, timercnt - 1);
672	}
673		1229
		1230	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1231	}
		1232
674	void	1233	void
675	evtimer_stop (struct ev_timer *w)	1234	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1235	{
		1236	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1237	if (!ev_is_active (w))
678	return;	1238	return;
679		1239
		1240	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1241
680	if (w->active < timercnt--)	1242	if (((W)w)->active < timercnt--)
681	{	1243	{
682	timers [w->active - 1] = timers [timercnt];	1244	timers [((W)w)->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
684	}	1246	}
685		1247
		1248	((WT)w)->at = w->repeat;
		1249
686	ev_stop ((W)w);	1250	ev_stop (EV_A_ (W)w);
687	}	1251	}
688		1252
689	void	1253	void
690	evperiodic_start (struct ev_periodic *w)	1254	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1255	{
692	if (ev_is_active (w))	1256	if (ev_is_active (w))
		1257	{
		1258	if (w->repeat)
		1259	{
		1260	((WT)w)->at = mn_now + w->repeat;
		1261	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1262	}
		1263	else
		1264	ev_timer_stop (EV_A_ w);
		1265	}
		1266	else if (w->repeat)
		1267	ev_timer_start (EV_A_ w);
		1268	}
		1269
		1270	void
		1271	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1272	{
		1273	if (ev_is_active (w))
693	return;	1274	return;
		1275
		1276	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694		1277
695	/* this formula differs from the one in periodic_reify because we do not always round up */	1278	/* this formula differs from the one in periodic_reify because we do not always round up */
696	if (w->interval)	1279	if (w->interval)
697	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1280	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
698		1281
699	ev_start ((W)w, ++periodiccnt);	1282	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1283	array_needsize (periodics, periodicmax, periodiccnt, );
701	periodics [periodiccnt - 1] = w;	1284	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1285	upheap ((WT *)periodics, periodiccnt - 1);
703	}
704		1286
		1287	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1288	}
		1289
705	void	1290	void
706	evperiodic_stop (struct ev_periodic *w)	1291	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1292	{
		1293	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1294	if (!ev_is_active (w))
709	return;	1295	return;
710		1296
		1297	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1298
711	if (w->active < periodiccnt--)	1299	if (((W)w)->active < periodiccnt--)
712	{	1300	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1301	periodics [((W)w)->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1302	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
715	}	1303	}
716		1304
717	ev_stop ((W)w);	1305	ev_stop (EV_A_ (W)w);
718	}	1306	}
719		1307
720	void	1308	void
721	evsignal_start (struct ev_signal *w)	1309	ev_idle_start (EV_P_ struct ev_idle *w)
722	{	1310	{
723	if (ev_is_active (w))	1311	if (ev_is_active (w))
724	return;	1312	return;
725		1313
		1314	ev_start (EV_A_ (W)w, ++idlecnt);
		1315	array_needsize (idles, idlemax, idlecnt, );
		1316	idles [idlecnt - 1] = w;
		1317	}
		1318
		1319	void
		1320	ev_idle_stop (EV_P_ struct ev_idle *w)
		1321	{
		1322	ev_clear_pending (EV_A_ (W)w);
		1323	if (ev_is_active (w))
		1324	return;
		1325
		1326	idles [((W)w)->active - 1] = idles [--idlecnt];
		1327	ev_stop (EV_A_ (W)w);
		1328	}
		1329
		1330	void
		1331	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1332	{
		1333	if (ev_is_active (w))
		1334	return;
		1335
		1336	ev_start (EV_A_ (W)w, ++preparecnt);
		1337	array_needsize (prepares, preparemax, preparecnt, );
		1338	prepares [preparecnt - 1] = w;
		1339	}
		1340
		1341	void
		1342	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1343	{
		1344	ev_clear_pending (EV_A_ (W)w);
		1345	if (ev_is_active (w))
		1346	return;
		1347
		1348	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1349	ev_stop (EV_A_ (W)w);
		1350	}
		1351
		1352	void
		1353	ev_check_start (EV_P_ struct ev_check *w)
		1354	{
		1355	if (ev_is_active (w))
		1356	return;
		1357
		1358	ev_start (EV_A_ (W)w, ++checkcnt);
		1359	array_needsize (checks, checkmax, checkcnt, );
		1360	checks [checkcnt - 1] = w;
		1361	}
		1362
		1363	void
		1364	ev_check_stop (EV_P_ struct ev_check *w)
		1365	{
		1366	ev_clear_pending (EV_A_ (W)w);
		1367	if (ev_is_active (w))
		1368	return;
		1369
		1370	checks [((W)w)->active - 1] = checks [--checkcnt];
		1371	ev_stop (EV_A_ (W)w);
		1372	}
		1373
		1374	#ifndef SA_RESTART
		1375	# define SA_RESTART 0
		1376	#endif
		1377
		1378	void
		1379	ev_signal_start (EV_P_ struct ev_signal *w)
		1380	{
		1381	#if EV_MULTIPLICITY
		1382	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1383	#endif
		1384	if (ev_is_active (w))
		1385	return;
		1386
		1387	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1388
726	ev_start ((W)w, 1);	1389	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1390	array_needsize (signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1391	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1392
730	if (!w->next)	1393	if (!((WL)w)->next)
731	{	1394	{
		1395	#if WIN32
		1396	signal (w->signum, sighandler);
		1397	#else
732	struct sigaction sa;	1398	struct sigaction sa;
733	sa.sa_handler = sighandler;	1399	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1400	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1401	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1402	sigaction (w->signum, &sa, 0);
		1403	#endif
737	}	1404	}
738	}	1405	}
739		1406
740	void	1407	void
741	evsignal_stop (struct ev_signal *w)	1408	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1409	{
		1410	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1411	if (!ev_is_active (w))
744	return;	1412	return;
745		1413
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1414	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1415	ev_stop (EV_A_ (W)w);
748		1416
749	if (!signals [w->signum - 1].head)	1417	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1418	signal (w->signum, SIG_DFL);
751	}	1419	}
752		1420
753	void evidle_start (struct ev_idle *w)	1421	void
		1422	ev_child_start (EV_P_ struct ev_child *w)
754	{	1423	{
		1424	#if EV_MULTIPLICITY
		1425	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1426	#endif
755	if (ev_is_active (w))	1427	if (ev_is_active (w))
756	return;	1428	return;
757		1429
758	ev_start ((W)w, ++idlecnt);	1430	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	1431	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	1432	}
762		1433
763	void evidle_stop (struct ev_idle *w)	1434	void
		1435	ev_child_stop (EV_P_ struct ev_child *w)
764	{	1436	{
765	idles [w->active - 1] = idles [--idlecnt];	1437	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))	1438	if (ev_is_active (w))
772	return;	1439	return;
773		1440
774	ev_start ((W)w, ++checkcnt);	1441	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);	1442	ev_stop (EV_A_ (W)w);
783	}	1443	}
784		1444
785	/*****************************************************************************/	1445	/*****************************************************************************/
786		1446
787	#if 1	1447	struct ev_once
788		1448	{
789	struct ev_io wio;	1449	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;	1450	struct ev_timer to;
843	evtimer_init (&t1, ocb, 5, 10);	1451	void (cb)(int revents, void arg);
844	evtimer_start (&t1);	1452	void *arg;
		1453	};
845		1454
846	struct ev_signal sig;	1455	static void
847	evsignal_init (&sig, scb, SIGQUIT);	1456	once_cb (EV_P_ struct ev_once *once, int revents)
848	evsignal_start (&sig);	1457	{
		1458	void (cb)(int revents, void arg) = once->cb;
		1459	void *arg = once->arg;
849		1460
850	struct ev_check cw;	1461	ev_io_stop (EV_A_ &once->io);
851	evcheck_init (&cw, gcb);	1462	ev_timer_stop (EV_A_ &once->to);
852	evcheck_start (&cw);	1463	ev_free (once);
853		1464
854	struct ev_idle iw;	1465	cb (revents, arg);
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;
861	}	1466	}
862		1467
863	#endif	1468	static void
		1469	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1470	{
		1471	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1472	}
864		1473
		1474	static void
		1475	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1476	{
		1477	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1478	}
865		1479
		1480	void
		1481	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1482	{
		1483	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
866		1484
		1485	if (!once)
		1486	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1487	else
		1488	{
		1489	once->cb = cb;
		1490	once->arg = arg;
867		1491
		1492	ev_watcher_init (&once->io, once_cb_io);
		1493	if (fd >= 0)
		1494	{
		1495	ev_io_set (&once->io, fd, events);
		1496	ev_io_start (EV_A_ &once->io);
		1497	}
		1498
		1499	ev_watcher_init (&once->to, once_cb_to);
		1500	if (timeout >= 0.)
		1501	{
		1502	ev_timer_set (&once->to, timeout, 0.);
		1503	ev_timer_start (EV_A_ &once->to);
		1504	}
		1505	}
		1506	}
		1507

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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 1.70 by root, Tue Nov 6 00:52:32 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 1.70 by root, Tue Nov 6 00:52:32 2007 UTC