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

Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 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
		75	/**/
		76
14	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
15	# ifdef CLOCK_MONOTONIC
16	# 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
17	# endif	102	# endif
18	#endif	103	#endif
19		104
20	#ifndef HAVE_SELECT
21	# define HAVE_SELECT 1
22	#endif
23
24	#ifndef HAVE_EPOLL
25	# define HAVE_EPOLL 0
26	#endif
27
28	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
30	#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	/**/
31		122
32	#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) */
33	#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 */
34		127
35	#include "ev.h"	128	#include "ev.h"
36		129
37	struct ev_watcher {	130	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	131	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
40		137
41	struct ev_watcher_list {	138	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	139	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		143
45	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
		146	typedef struct ev_watcher_time *WT;
47		147
48	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
49	ev_tstamp ev_now;
50	int ev_method;
51		149
52	static int have_monotonic; /* runtime */	150	#if WIN32
53		151	/* note: the comment below could not be substantiated, but what would I care */
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
55	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
56	static void (*method_poll)(ev_tstamp timeout);	154	#endif
57		155
58	/*****************************************************************************/	156	/*****************************************************************************/
59		157
60	ev_tstamp	158	typedef struct
		159	{
		160	WL head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
		164
		165	typedef struct
		166	{
		167	W w;
		168	int events;
		169	} ANPENDING;
		170
		171	#if EV_MULTIPLICITY
		172
		173	struct ev_loop
		174	{
		175	# define VAR(name,decl) decl;
		176	# include "ev_vars.h"
		177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
		180
		181	#else
		182
		183	# define VAR(name,decl) static decl;
		184	# include "ev_vars.h"
		185	# undef VAR
		186
		187	#endif
		188
		189	/*****************************************************************************/
		190
		191	inline ev_tstamp
61	ev_time (void)	192	ev_time (void)
62	{	193	{
63	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
64	struct timespec ts;	195	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	198	#else
68	struct timeval tv;	199	struct timeval tv;
69	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	202	#endif
72	}	203	}
73		204
74	static ev_tstamp	205	inline ev_tstamp
75	get_clock (void)	206	get_clock (void)
76	{	207	{
77	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
78	if (have_monotonic)	209	if (expect_true (have_monotonic))
79	{	210	{
80	struct timespec ts;	211	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	214	}
84	#endif	215	#endif
85		216
86	return ev_time ();	217	return ev_time ();
87	}	218	}
88		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) \| 4 & ~3)
		227
89	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
91	{ \	230	{ \
92	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	232	do \
		233	{ \
		234	newcnt = array_roundsize (base, newcnt << 1); \
		235	} \
		236	while ((cnt) > newcnt); \
		237	\
94	base = realloc (base, sizeof (base) (newcnt)); \	238	base = realloc (base, sizeof (base) (newcnt)); \
95	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	240	cur = newcnt; \
97	}	241	}
98		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (base) (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
99	/*****************************************************************************/	254	/*****************************************************************************/
100		255
101	typedef struct
102	{
103	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	256	static void
114	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
115	{	258	{
116	while (count--)	259	while (count--)
117	{	260	{
118	base->head = 0;	261	base->head = 0;
119	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
120	++base;	265	++base;
121	}	266	}
122	}	267	}
123		268
124	typedef struct
125	{
126	W w;
127	int events;
128	} ANPENDING;
129
130	static ANPENDING *pendings;
131	static int pendingmax, pendingcnt;
132
133	static void	269	static void
134	event (W w, int events)	270	event (EV_P_ W w, int events)
135	{	271	{
		272	if (w->pending)
		273	{
		274	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		275	return;
		276	}
		277
136	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
138	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
140	}	282	}
141		283
142	static void	284	static void
		285	queue_events (EV_P_ W *events, int eventcnt, int type)
		286	{
		287	int i;
		288
		289	for (i = 0; i < eventcnt; ++i)
		290	event (EV_A_ events [i], type);
		291	}
		292
		293	static void
143	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
144	{	295	{
145	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	297	struct ev_io *w;
147		298
148	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
149	{	300	{
150	int ev = w->events & events;	301	int ev = w->events & events;
151		302
152	if (ev)	303	if (ev)
153	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
154	}	305	}
155	}	306	}
156		307
		308	/*****************************************************************************/
		309
157	static void	310	static void
158	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
159	{	312	{
160	int i;	313	int i;
161		314
162	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	316	{
		317	int fd = fdchanges [i];
		318	ANFD *anfd = anfds + fd;
		319	struct ev_io *w;
		320
		321	int events = 0;
		322
		323	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
		324	events \|= w->events;
		325
		326	anfd->reify = 0;
		327
		328	method_modify (EV_A_ fd, anfd->events, events);
		329	anfd->events = events;
		330	}
		331
		332	fdchangecnt = 0;
		333	}
		334
		335	static void
		336	fd_change (EV_P_ int fd)
		337	{
		338	if (anfds [fd].reify \|\| fdchangecnt < 0)
		339	return;
		340
		341	anfds [fd].reify = 1;
		342
		343	++fdchangecnt;
		344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		345	fdchanges [fdchangecnt - 1] = fd;
		346	}
		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		357	}
		358	}
		359
		360	/* called on EBADF to verify fds */
		361	static void
		362	fd_ebadf (EV_P)
		363	{
		364	int fd;
		365
		366	for (fd = 0; fd < anfdmax; ++fd)
		367	if (anfds [fd].events)
		368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		369	fd_kill (EV_A_ fd);
		370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
		380	{
		381	fd_kill (EV_A_ fd);
		382	return;
		383	}
		384	}
		385
		386	/* susually called after fork if method needs to re-arm all fds from scratch */
		387	static void
		388	fd_rearm_all (EV_P)
		389	{
		390	int fd;
		391
		392	/* this should be highly optimised to not do anything but set a flag */
		393	for (fd = 0; fd < anfdmax; ++fd)
		394	if (anfds [fd].events)
		395	{
		396	anfds [fd].events = 0;
		397	fd_change (EV_A_ fd);
		398	}
164	}	399	}
165		400
166	/*****************************************************************************/	401	/*****************************************************************************/
167		402
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void	403	static void
175	upheap (struct ev_timer **timers, int k)	404	upheap (WT *heap, int k)
176	{	405	{
177	struct ev_timer *w = timers [k];	406	WT w = heap [k];
178		407
179	while (k && timers [k >> 1]->at > w->at)	408	while (k && heap [k >> 1]->at > w->at)
180	{	409	{
181	timers [k] = timers [k >> 1];	410	heap [k] = heap [k >> 1];
182	timers [k]->active = k + 1;	411	((W)heap [k])->active = k + 1;
183	k >>= 1;	412	k >>= 1;
184	}	413	}
185		414
186	timers [k] = w;	415	heap [k] = w;
187	timers [k]->active = k + 1;	416	((W)heap [k])->active = k + 1;
188		417
189	}	418	}
190		419
191	static void	420	static void
192	downheap (struct ev_timer **timers, int N, int k)	421	downheap (WT *heap, int N, int k)
193	{	422	{
194	struct ev_timer *w = timers [k];	423	WT w = heap [k];
195		424
196	while (k < (N >> 1))	425	while (k < (N >> 1))
197	{	426	{
198	int j = k << 1;	427	int j = k << 1;
199		428
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
201	++j;	430	++j;
202		431
203	if (w->at <= timers [j]->at)	432	if (w->at <= heap [j]->at)
204	break;	433	break;
205		434
206	timers [k] = timers [j];	435	heap [k] = heap [j];
207	timers [k]->active = k + 1;	436	((W)heap [k])->active = k + 1;
208	k = j;	437	k = j;
209	}	438	}
210		439
211	timers [k] = w;	440	heap [k] = w;
212	timers [k]->active = k + 1;	441	((W)heap [k])->active = k + 1;
213	}	442	}
214		443
215	/*****************************************************************************/	444	/*****************************************************************************/
216		445
217	typedef struct	446	typedef struct
218	{	447	{
219	struct ev_signal *head;	448	WL head;
220	sig_atomic_t gotsig;	449	sig_atomic_t volatile gotsig;
221	} ANSIG;	450	} ANSIG;
222		451
223	static ANSIG *signals;	452	static ANSIG *signals;
224	static int signalmax;	453	static int signalmax;
225		454
226	static int sigpipe [2];	455	static int sigpipe [2];
227	static sig_atomic_t gotsig;	456	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	457	static struct ev_io sigev;
229		458
230	static void	459	static void
231	signals_init (ANSIG *base, int count)	460	signals_init (ANSIG *base, int count)
232	{	461	{
233	while (count--)	462	while (count--)
234	{	463	{
235	base->head = 0;	464	base->head = 0;
236	base->gotsig = 0;	465	base->gotsig = 0;
		466
237	++base;	467	++base;
238	}	468	}
239	}	469	}
240		470
241	static void	471	static void
242	sighandler (int signum)	472	sighandler (int signum)
243	{	473	{
		474	#if WIN32
		475	signal (signum, sighandler);
		476	#endif
		477
244	signals [signum - 1].gotsig = 1;	478	signals [signum - 1].gotsig = 1;
245		479
246	if (!gotsig)	480	if (!gotsig)
247	{	481	{
		482	int old_errno = errno;
248	gotsig = 1;	483	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	484	write (sigpipe [1], &signum, 1);
		485	errno = old_errno;
250	}	486	}
251	}	487	}
252		488
253	static void	489	static void
254	sigcb (struct ev_io *iow, int revents)	490	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	491	{
256	struct ev_signal *w;	492	WL w;
257	int sig;	493	int signum;
258		494
		495	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	496	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		497
262	for (sig = signalmax; sig--; )	498	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	499	if (signals [signum].gotsig)
264	{	500	{
265	signals [sig].gotsig = 0;	501	signals [signum].gotsig = 0;
266		502
267	for (w = signals [sig].head; w; w = w->next)	503	for (w = signals [signum].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);	504	event (EV_A_ (W)w, EV_SIGNAL);
269	}	505	}
270	}	506	}
271		507
272	static void	508	static void
273	siginit (void)	509	siginit (EV_P)
274	{	510	{
		511	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	512	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		514
278	/* rather than sort out wether we really need nb, set it */	515	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		518	#endif
281		519
282	evio_set (&sigev, sigpipe [0], EV_READ);	520	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	521	ev_io_start (EV_A_ &sigev);
		522	ev_unref (EV_A); /* child watcher should not keep loop alive */
284	}	523	}
285		524
286	/*****************************************************************************/	525	/*****************************************************************************/
287		526
288	static struct ev_idle **idles;	527	#ifndef WIN32
289	static int idlemax, idlecnt;
290		528
291	static struct ev_check **checks;	529	static struct ev_child *childs [PID_HASHSIZE];
292	static int checkmax, checkcnt;	530	static struct ev_signal childev;
		531
		532	#ifndef WCONTINUED
		533	# define WCONTINUED 0
		534	#endif
		535
		536	static void
		537	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		538	{
		539	struct ev_child *w;
		540
		541	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		542	if (w->pid == pid \|\| !w->pid)
		543	{
		544	ev_priority (w) = ev_priority (sw); /* need to do it now */
		545	w->rpid = pid;
		546	w->rstatus = status;
		547	event (EV_A_ (W)w, EV_CHILD);
		548	}
		549	}
		550
		551	static void
		552	childcb (EV_P_ struct ev_signal *sw, int revents)
		553	{
		554	int pid, status;
		555
		556	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		557	{
		558	/* make sure we are called again until all childs have been reaped */
		559	event (EV_A_ (W)sw, EV_SIGNAL);
		560
		561	child_reap (EV_A_ sw, pid, pid, status);
		562	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		563	}
		564	}
		565
		566	#endif
293		567
294	/*****************************************************************************/	568	/*****************************************************************************/
295		569
		570	#if EV_USE_KQUEUE
		571	# include "ev_kqueue.c"
		572	#endif
296	#if HAVE_EPOLL	573	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	574	# include "ev_epoll.c"
298	#endif	575	#endif
		576	#if EV_USE_POLL
		577	# include "ev_poll.c"
		578	#endif
299	#if HAVE_SELECT	579	#if EV_USE_SELECT
300	# include "ev_select.c"	580	# include "ev_select.c"
301	#endif	581	#endif
302		582
303	int ev_init (int flags)	583	int
		584	ev_version_major (void)
304	{	585	{
		586	return EV_VERSION_MAJOR;
		587	}
		588
		589	int
		590	ev_version_minor (void)
		591	{
		592	return EV_VERSION_MINOR;
		593	}
		594
		595	/* return true if we are running with elevated privileges and should ignore env variables */
		596	static int
		597	enable_secure (void)
		598	{
		599	#ifdef WIN32
		600	return 0;
		601	#else
		602	return getuid () != geteuid ()
		603	\|\| getgid () != getegid ();
		604	#endif
		605	}
		606
		607	int
		608	ev_method (EV_P)
		609	{
		610	return method;
		611	}
		612
		613	static void
		614	loop_init (EV_P_ int methods)
		615	{
		616	if (!method)
		617	{
305	#if HAVE_MONOTONIC	618	#if EV_USE_MONOTONIC
306	{	619	{
307	struct timespec ts;	620	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	621	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	622	have_monotonic = 1;
310	}	623	}
311	#endif	624	#endif
312		625
313	ev_now = ev_time ();	626	rt_now = ev_time ();
314	now = get_clock ();	627	mn_now = get_clock ();
315	diff = ev_now - now;	628	now_floor = mn_now;
		629	rtmn_diff = rt_now - mn_now;
316		630
		631	if (methods == EVMETHOD_AUTO)
		632	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		633	methods = atoi (getenv ("LIBEV_METHODS"));
		634	else
		635	methods = EVMETHOD_ANY;
		636
		637	method = 0;
		638	#if EV_USE_WIN32
		639	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		640	#endif
		641	#if EV_USE_KQUEUE
		642	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		643	#endif
		644	#if EV_USE_EPOLL
		645	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		646	#endif
		647	#if EV_USE_POLL
		648	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		649	#endif
		650	#if EV_USE_SELECT
		651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		652	#endif
		653	}
		654	}
		655
		656	void
		657	loop_destroy (EV_P)
		658	{
		659	int i;
		660
		661	#if EV_USE_WIN32
		662	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		663	#endif
		664	#if EV_USE_KQUEUE
		665	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		666	#endif
		667	#if EV_USE_EPOLL
		668	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		669	#endif
		670	#if EV_USE_POLL
		671	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		672	#endif
		673	#if EV_USE_SELECT
		674	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		675	#endif
		676
		677	for (i = NUMPRI; i--; )
		678	array_free (pending, [i]);
		679
		680	array_free (fdchange, );
		681	array_free (timer, );
		682	array_free (periodic, );
		683	array_free (idle, );
		684	array_free (prepare, );
		685	array_free (check, );
		686
		687	method = 0;
		688	/TODO/
		689	}
		690
		691	void
		692	loop_fork (EV_P)
		693	{
		694	/TODO/
		695	#if EV_USE_EPOLL
		696	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		697	#endif
		698	#if EV_USE_KQUEUE
		699	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		700	#endif
		701	}
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop *
		705	ev_loop_new (int methods)
		706	{
		707	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		708
		709	loop_init (EV_A_ methods);
		710
		711	if (ev_method (EV_A))
		712	return loop;
		713
		714	return 0;
		715	}
		716
		717	void
		718	ev_loop_destroy (EV_P)
		719	{
		720	loop_destroy (EV_A);
		721	free (loop);
		722	}
		723
		724	void
		725	ev_loop_fork (EV_P)
		726	{
		727	loop_fork (EV_A);
		728	}
		729
		730	#endif
		731
		732	#if EV_MULTIPLICITY
		733	struct ev_loop default_loop_struct;
		734	static struct ev_loop *default_loop;
		735
		736	struct ev_loop *
		737	#else
		738	static int default_loop;
		739
		740	int
		741	#endif
		742	ev_default_loop (int methods)
		743	{
		744	if (sigpipe [0] == sigpipe [1])
317	if (pipe (sigpipe))	745	if (pipe (sigpipe))
318	return 0;	746	return 0;
319		747
320	ev_method = EVMETHOD_NONE;	748	if (!default_loop)
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{	749	{
		750	#if EV_MULTIPLICITY
		751	struct ev_loop *loop = default_loop = &default_loop_struct;
		752	#else
		753	default_loop = 1;
		754	#endif
		755
		756	loop_init (EV_A_ methods);
		757
		758	if (ev_method (EV_A))
		759	{
330	evw_init (&sigev, sigcb, 0);	760	ev_watcher_init (&sigev, sigcb);
		761	ev_set_priority (&sigev, EV_MAXPRI);
331	siginit ();	762	siginit (EV_A);
332	}
333		763
334	return ev_method;	764	#ifndef WIN32
335	}	765	ev_signal_init (&childev, childcb, SIGCHLD);
336		766	ev_set_priority (&childev, EV_MAXPRI);
337	/*****************************************************************************/	767	ev_signal_start (EV_A_ &childev);
338		768	ev_unref (EV_A); /* child watcher should not keep loop alive */
339	void ev_prefork (void)
340	{
341	/* nop */
342	}
343
344	void ev_postfork_parent (void)
345	{
346	/* nop */
347	}
348
349	void ev_postfork_child (void)
350	{
351	#if HAVE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();
354	#endif	769	#endif
		770	}
		771	else
		772	default_loop = 0;
		773	}
355		774
		775	return default_loop;
		776	}
		777
		778	void
		779	ev_default_destroy (void)
		780	{
		781	#if EV_MULTIPLICITY
		782	struct ev_loop *loop = default_loop;
		783	#endif
		784
		785	ev_ref (EV_A); /* child watcher */
		786	ev_signal_stop (EV_A_ &childev);
		787
		788	ev_ref (EV_A); /* signal watcher */
356	evio_stop (&sigev);	789	ev_io_stop (EV_A_ &sigev);
		790
		791	close (sigpipe [0]); sigpipe [0] = 0;
		792	close (sigpipe [1]); sigpipe [1] = 0;
		793
		794	loop_destroy (EV_A);
		795	}
		796
		797	void
		798	ev_default_fork (void)
		799	{
		800	#if EV_MULTIPLICITY
		801	struct ev_loop *loop = default_loop;
		802	#endif
		803
		804	loop_fork (EV_A);
		805
		806	ev_io_stop (EV_A_ &sigev);
357	close (sigpipe [0]);	807	close (sigpipe [0]);
358	close (sigpipe [1]);	808	close (sigpipe [1]);
359	pipe (sigpipe);	809	pipe (sigpipe);
		810
		811	ev_ref (EV_A); /* signal watcher */
360	siginit ();	812	siginit (EV_A);
361	}	813	}
362		814
363	/*****************************************************************************/	815	/*****************************************************************************/
364		816
365	static void	817	static void
366	fd_reify (void)	818	call_pending (EV_P)
367	{	819	{
368	int i;	820	int pri;
369		821
370	for (i = 0; i < fdchangecnt; ++i)	822	for (pri = NUMPRI; pri--; )
371	{	823	while (pendingcnt [pri])
372	int fd = fdchanges [i];
373	ANFD *anfd = anfds + fd;
374	struct ev_io *w;
375
376	int wev = 0;
377
378	for (w = anfd->head; w; w = w->next)
379	wev \|= w->events;
380
381	if (anfd->wev != wev)
382	{	824	{
383	method_modify (fd, anfd->wev, wev);	825	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
384	anfd->wev = wev;
385	}
386	}
387		826
388	fdchangecnt = 0;
389	}
390
391	static void
392	call_pending ()
393	{
394	int i;
395
396	for (i = 0; i < pendingcnt; ++i)
397	{
398	ANPENDING *p = pendings + i;
399
400	if (p->w)	827	if (p->w)
401	{	828	{
402	p->w->pending = 0;	829	p->w->pending = 0;
403	p->w->cb (p->w, p->events);	830	p->w->cb (EV_A_ p->w, p->events);
404	}	831	}
405	}	832	}
406
407	pendingcnt = 0;
408	}	833	}
409		834
410	static void	835	static void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	836	timers_reify (EV_P)
412	{	837	{
413	while (timercnt && timers [0]->at <= now)	838	while (timercnt && ((WT)timers [0])->at <= mn_now)
414	{	839	{
415	struct ev_timer *w = timers [0];	840	struct ev_timer *w = timers [0];
		841
		842	assert (("inactive timer on timer heap detected", ev_is_active (w)));
416		843
417	/* first reschedule or stop timer */	844	/* first reschedule or stop timer */
418	if (w->repeat)	845	if (w->repeat)
419	{	846	{
420	if (w->is_abs)	847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
422	else
423	w->at = now + w->repeat;	848	((WT)w)->at = mn_now + w->repeat;
424
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	849	downheap ((WT *)timers, timercnt, 0);
428	}	850	}
429	else	851	else
		852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		853
		854	event (EV_A_ (W)w, EV_TIMEOUT);
		855	}
		856	}
		857
		858	static void
		859	periodics_reify (EV_P)
		860	{
		861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		862	{
		863	struct ev_periodic *w = periodics [0];
		864
		865	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		866
		867	/* first reschedule or stop timer */
		868	if (w->interval)
430	{	869	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	870	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
432	--timercnt; /* maybe pass by reference instead? */	871	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		872	downheap ((WT *)periodics, periodiccnt, 0);
433	}	873	}
		874	else
		875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		876
435	event ((W)w, EV_TIMEOUT);	877	event (EV_A_ (W)w, EV_PERIODIC);
436	}	878	}
437	}	879	}
438		880
439	static void	881	static void
440	time_update ()	882	periodics_reschedule (EV_P)
441	{	883	{
442	int i;	884	int i;
443	ev_now = ev_time ();
444		885
445	if (have_monotonic)	886	/* adjust periodics after time jump */
		887	for (i = 0; i < periodiccnt; ++i)
446	{	888	{
447	ev_tstamp odiff = diff;	889	struct ev_periodic *w = periodics [i];
448		890
449	/* detecting time jumps is much more difficult */	891	if (w->interval)
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */
451	{	892	{
452	now = get_clock ();	893	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
453	diff = ev_now - now;
454		894
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	895	if (fabs (diff) >= 1e-4)
456	return; /* all is well */	896	{
		897	ev_periodic_stop (EV_A_ w);
		898	ev_periodic_start (EV_A_ w);
457		899
458	ev_now = ev_time ();	900	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		901	}
459	}	902	}
		903	}
		904	}
460		905
461	/* time jump detected, reschedule atimers */	906	inline int
462	for (i = 0; i < atimercnt; ++i)	907	time_update_monotonic (EV_P)
		908	{
		909	mn_now = get_clock ();
		910
		911	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		912	{
		913	rt_now = rtmn_diff + mn_now;
		914	return 0;
		915	}
		916	else
		917	{
		918	now_floor = mn_now;
		919	rt_now = ev_time ();
		920	return 1;
		921	}
		922	}
		923
		924	static void
		925	time_update (EV_P)
		926	{
		927	int i;
		928
		929	#if EV_USE_MONOTONIC
		930	if (expect_true (have_monotonic))
		931	{
		932	if (time_update_monotonic (EV_A))
463	{	933	{
464	struct ev_timer *w = atimers [i];	934	ev_tstamp odiff = rtmn_diff;
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	935
		936	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		937	{
		938	rtmn_diff = rt_now - mn_now;
		939
		940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		941	return; /* all is well */
		942
		943	rt_now = ev_time ();
		944	mn_now = get_clock ();
		945	now_floor = mn_now;
		946	}
		947
		948	periodics_reschedule (EV_A);
		949	/* no timer adjustment, as the monotonic clock doesn't jump */
		950	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
466	}	951	}
467	}	952	}
468	else	953	else
		954	#endif
469	{	955	{
470	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	956	rt_now = ev_time ();
471	/* time jump detected, adjust rtimers */	957
		958	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		959	{
		960	periodics_reschedule (EV_A);
		961
		962	/* adjust timers. this is easy, as the offset is the same for all */
472	for (i = 0; i < rtimercnt; ++i)	963	for (i = 0; i < timercnt; ++i)
473	rtimers [i]->at += ev_now - now;	964	((WT)timers [i])->at += rt_now - mn_now;
		965	}
474		966
475	now = ev_now;	967	mn_now = rt_now;
476	}	968	}
477	}	969	}
478		970
479	int ev_loop_done;	971	void
		972	ev_ref (EV_P)
		973	{
		974	++activecnt;
		975	}
480		976
		977	void
		978	ev_unref (EV_P)
		979	{
		980	--activecnt;
		981	}
		982
		983	static int loop_done;
		984
		985	void
481	void ev_loop (int flags)	986	ev_loop (EV_P_ int flags)
482	{	987	{
483	double block;	988	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;	989	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
485
486	if (checkcnt)
487	{
488	queue_events ((W *)checks, checkcnt, EV_CHECK);
489	call_pending ();
490	}
491		990
492	do	991	do
493	{	992	{
		993	/* queue check watchers (and execute them) */
		994	if (expect_false (preparecnt))
		995	{
		996	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		997	call_pending (EV_A);
		998	}
		999
494	/* update fd-related kernel structures */	1000	/* update fd-related kernel structures */
495	fd_reify ();	1001	fd_reify (EV_A);
496		1002
497	/* calculate blocking time */	1003	/* calculate blocking time */
		1004
		1005	/* we only need this for !monotonic clockor timers, but as we basically
		1006	always have timers, we just calculate it always */
		1007	#if EV_USE_MONOTONIC
		1008	if (expect_true (have_monotonic))
		1009	time_update_monotonic (EV_A);
		1010	else
		1011	#endif
		1012	{
		1013	rt_now = ev_time ();
		1014	mn_now = rt_now;
		1015	}
		1016
498	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1017	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
499	block = 0.;	1018	block = 0.;
500	else	1019	else
501	{	1020	{
502	block = MAX_BLOCKTIME;	1021	block = MAX_BLOCKTIME;
503		1022
504	if (rtimercnt)	1023	if (timercnt)
505	{	1024	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1025	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
507	if (block > to) block = to;	1026	if (block > to) block = to;
508	}	1027	}
509		1028
510	if (atimercnt)	1029	if (periodiccnt)
511	{	1030	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
513	if (block > to) block = to;	1032	if (block > to) block = to;
514	}	1033	}
515		1034
516	if (block < 0.) block = 0.;	1035	if (block < 0.) block = 0.;
517	}	1036	}
518		1037
519	method_poll (block);	1038	method_poll (EV_A_ block);
520		1039
521	/* update ev_now, do magic */	1040	/* update rt_now, do magic */
522	time_update ();	1041	time_update (EV_A);
523		1042
524	/* queue pending timers and reschedule them */	1043	/* queue pending timers and reschedule them */
525	/* absolute timers first */	1044	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	1045	periodics_reify (EV_A); /* absolute timers called first */
527	/* relative timers second */
528	timers_reify (rtimers, rtimercnt, now);
529		1046
530	/* queue idle watchers unless io or timers are pending */	1047	/* queue idle watchers unless io or timers are pending */
531	if (!pendingcnt)	1048	if (!pendingcnt)
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	1049	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
533		1050
534	/* queue check and possibly idle watchers */	1051	/* queue check watchers, to be executed first */
		1052	if (checkcnt)
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	1053	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		1054
537	call_pending ();	1055	call_pending (EV_A);
538	}	1056	}
539	while (!ev_loop_done);	1057	while (activecnt && !loop_done);
		1058
		1059	if (loop_done != 2)
		1060	loop_done = 0;
		1061	}
		1062
		1063	void
		1064	ev_unloop (EV_P_ int how)
		1065	{
		1066	loop_done = how;
540	}	1067	}
541		1068
542	/*****************************************************************************/	1069	/*****************************************************************************/
543		1070
544	static void	1071	inline void
545	wlist_add (WL *head, WL elem)	1072	wlist_add (WL *head, WL elem)
546	{	1073	{
547	elem->next = *head;	1074	elem->next = *head;
548	*head = elem;	1075	*head = elem;
549	}	1076	}
550		1077
551	static void	1078	inline void
552	wlist_del (WL *head, WL elem)	1079	wlist_del (WL *head, WL elem)
553	{	1080	{
554	while (*head)	1081	while (*head)
555	{	1082	{
556	if (*head == elem)	1083	if (*head == elem)
561		1088
562	head = &(*head)->next;	1089	head = &(*head)->next;
563	}	1090	}
564	}	1091	}
565		1092
566	static void	1093	inline void
		1094	ev_clear_pending (EV_P_ W w)
		1095	{
		1096	if (w->pending)
		1097	{
		1098	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1099	w->pending = 0;
		1100	}
		1101	}
		1102
		1103	inline void
567	ev_start (W w, int active)	1104	ev_start (EV_P_ W w, int active)
568	{	1105	{
569	w->pending = 0;	1106	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1107	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1108
570	w->active = active;	1109	w->active = active;
		1110	ev_ref (EV_A);
571	}	1111	}
572		1112
573	static void	1113	inline void
574	ev_stop (W w)	1114	ev_stop (EV_P_ W w)
575	{	1115	{
576	if (w->pending)	1116	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	1117	w->active = 0;
580	}	1118	}
581		1119
582	/*****************************************************************************/	1120	/*****************************************************************************/
583		1121
584	void	1122	void
585	evio_start (struct ev_io *w)	1123	ev_io_start (EV_P_ struct ev_io *w)
586	{	1124	{
		1125	int fd = w->fd;
		1126
587	if (ev_is_active (w))	1127	if (ev_is_active (w))
588	return;	1128	return;
589		1129
590	int fd = w->fd;	1130	assert (("ev_io_start called with negative fd", fd >= 0));
591		1131
592	ev_start ((W)w, 1);	1132	ev_start (EV_A_ (W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1133	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1134	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595		1135
596	++fdchangecnt;	1136	fd_change (EV_A_ fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}	1137	}
600		1138
601	void	1139	void
602	evio_stop (struct ev_io *w)	1140	ev_io_stop (EV_P_ struct ev_io *w)
603	{	1141	{
		1142	ev_clear_pending (EV_A_ (W)w);
604	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
605	return;	1144	return;
606		1145
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1146	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
609		1148
610	++fdchangecnt;	1149	fd_change (EV_A_ w->fd);
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}	1150	}
614		1151
615	void	1152	void
616	evtimer_start (struct ev_timer *w)	1153	ev_timer_start (EV_P_ struct ev_timer *w)
617	{	1154	{
618	if (ev_is_active (w))	1155	if (ev_is_active (w))
619	return;	1156	return;
620		1157
621	if (w->is_abs)	1158	((WT)w)->at += mn_now;
		1159
		1160	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1161
		1162	ev_start (EV_A_ (W)w, ++timercnt);
		1163	array_needsize (timers, timermax, timercnt, );
		1164	timers [timercnt - 1] = w;
		1165	upheap ((WT *)timers, timercnt - 1);
		1166
		1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1168	}
		1169
		1170	void
		1171	ev_timer_stop (EV_P_ struct ev_timer *w)
		1172	{
		1173	ev_clear_pending (EV_A_ (W)w);
		1174	if (!ev_is_active (w))
		1175	return;
		1176
		1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1178
		1179	if (((W)w)->active < timercnt--)
		1180	{
		1181	timers [((W)w)->active - 1] = timers [timercnt];
		1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
622	{	1183	}
623	/* this formula differs from the one in timer_reify becuse we do not round up */	1184
		1185	((WT)w)->at = w->repeat;
		1186
		1187	ev_stop (EV_A_ (W)w);
		1188	}
		1189
		1190	void
		1191	ev_timer_again (EV_P_ struct ev_timer *w)
		1192	{
		1193	if (ev_is_active (w))
		1194	{
624	if (w->repeat)	1195	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1196	{
626		1197	((WT)w)->at = mn_now + w->repeat;
627	ev_start ((W)w, ++atimercnt);	1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
628	array_needsize (atimers, atimermax, atimercnt, );	1199	}
629	atimers [atimercnt - 1] = w;
630	upheap (atimers, atimercnt - 1);
631	}
632	else	1200	else
		1201	ev_timer_stop (EV_A_ w);
633	{	1202	}
634	w->at += now;	1203	else if (w->repeat)
635		1204	ev_timer_start (EV_A_ w);
636	ev_start ((W)w, ++rtimercnt);
637	array_needsize (rtimers, rtimermax, rtimercnt, );
638	rtimers [rtimercnt - 1] = w;
639	upheap (rtimers, rtimercnt - 1);
640	}
641
642	}	1205	}
643		1206
644	void	1207	void
645	evtimer_stop (struct ev_timer *w)	1208	ev_periodic_start (EV_P_ struct ev_periodic *w)
646	{	1209	{
		1210	if (ev_is_active (w))
		1211	return;
		1212
		1213	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1214
		1215	/* this formula differs from the one in periodic_reify because we do not always round up */
		1216	if (w->interval)
		1217	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1218
		1219	ev_start (EV_A_ (W)w, ++periodiccnt);
		1220	array_needsize (periodics, periodicmax, periodiccnt, );
		1221	periodics [periodiccnt - 1] = w;
		1222	upheap ((WT *)periodics, periodiccnt - 1);
		1223
		1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1225	}
		1226
		1227	void
		1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
647	if (!ev_is_active (w))	1231	if (!ev_is_active (w))
648	return;	1232	return;
649		1233
650	if (w->is_abs)	1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
651	{	1235
652	if (w->active < atimercnt--)	1236	if (((W)w)->active < periodiccnt--)
653	{
654	atimers [w->active - 1] = atimers [atimercnt];
655	downheap (atimers, atimercnt, w->active - 1);
656	}
657	}	1237	{
658	else	1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
659	{	1240	}
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}
666		1241
667	ev_stop ((W)w);	1242	ev_stop (EV_A_ (W)w);
668	}	1243	}
669		1244
670	void	1245	void
671	evsignal_start (struct ev_signal *w)	1246	ev_idle_start (EV_P_ struct ev_idle *w)
672	{	1247	{
673	if (ev_is_active (w))	1248	if (ev_is_active (w))
674	return;	1249	return;
675		1250
		1251	ev_start (EV_A_ (W)w, ++idlecnt);
		1252	array_needsize (idles, idlemax, idlecnt, );
		1253	idles [idlecnt - 1] = w;
		1254	}
		1255
		1256	void
		1257	ev_idle_stop (EV_P_ struct ev_idle *w)
		1258	{
		1259	ev_clear_pending (EV_A_ (W)w);
		1260	if (ev_is_active (w))
		1261	return;
		1262
		1263	idles [((W)w)->active - 1] = idles [--idlecnt];
		1264	ev_stop (EV_A_ (W)w);
		1265	}
		1266
		1267	void
		1268	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1269	{
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	ev_start (EV_A_ (W)w, ++preparecnt);
		1274	array_needsize (prepares, preparemax, preparecnt, );
		1275	prepares [preparecnt - 1] = w;
		1276	}
		1277
		1278	void
		1279	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1280	{
		1281	ev_clear_pending (EV_A_ (W)w);
		1282	if (ev_is_active (w))
		1283	return;
		1284
		1285	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1286	ev_stop (EV_A_ (W)w);
		1287	}
		1288
		1289	void
		1290	ev_check_start (EV_P_ struct ev_check *w)
		1291	{
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	ev_start (EV_A_ (W)w, ++checkcnt);
		1296	array_needsize (checks, checkmax, checkcnt, );
		1297	checks [checkcnt - 1] = w;
		1298	}
		1299
		1300	void
		1301	ev_check_stop (EV_P_ struct ev_check *w)
		1302	{
		1303	ev_clear_pending (EV_A_ (W)w);
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	checks [((W)w)->active - 1] = checks [--checkcnt];
		1308	ev_stop (EV_A_ (W)w);
		1309	}
		1310
		1311	#ifndef SA_RESTART
		1312	# define SA_RESTART 0
		1313	#endif
		1314
		1315	void
		1316	ev_signal_start (EV_P_ struct ev_signal *w)
		1317	{
		1318	#if EV_MULTIPLICITY
		1319	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1320	#endif
		1321	if (ev_is_active (w))
		1322	return;
		1323
		1324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1325
676	ev_start ((W)w, 1);	1326	ev_start (EV_A_ (W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	1327	array_needsize (signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		1329
680	if (!w->next)	1330	if (!((WL)w)->next)
681	{	1331	{
		1332	#if WIN32
		1333	signal (w->signum, sighandler);
		1334	#else
682	struct sigaction sa;	1335	struct sigaction sa;
683	sa.sa_handler = sighandler;	1336	sa.sa_handler = sighandler;
684	sigfillset (&sa.sa_mask);	1337	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	1339	sigaction (w->signum, &sa, 0);
		1340	#endif
687	}	1341	}
688	}	1342	}
689		1343
690	void	1344	void
691	evsignal_stop (struct ev_signal *w)	1345	ev_signal_stop (EV_P_ struct ev_signal *w)
692	{	1346	{
		1347	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1348	if (!ev_is_active (w))
694	return;	1349	return;
695		1350
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1351	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	1352	ev_stop (EV_A_ (W)w);
698		1353
699	if (!signals [w->signum - 1].head)	1354	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	1355	signal (w->signum, SIG_DFL);
701	}	1356	}
702		1357
703	void evidle_start (struct ev_idle *w)	1358	void
		1359	ev_child_start (EV_P_ struct ev_child *w)
704	{	1360	{
		1361	#if EV_MULTIPLICITY
		1362	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1363	#endif
705	if (ev_is_active (w))	1364	if (ev_is_active (w))
706	return;	1365	return;
707		1366
708	ev_start ((W)w, ++idlecnt);	1367	ev_start (EV_A_ (W)w, 1);
709	array_needsize (idles, idlemax, idlecnt, );	1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
710	idles [idlecnt - 1] = w;
711	}	1369	}
712		1370
713	void evidle_stop (struct ev_idle *w)	1371	void
		1372	ev_child_stop (EV_P_ struct ev_child *w)
714	{	1373	{
715	idles [w->active - 1] = idles [--idlecnt];	1374	ev_clear_pending (EV_A_ (W)w);
716	ev_stop ((W)w);
717	}
718
719	void evcheck_start (struct ev_check *w)
720	{
721	if (ev_is_active (w))	1375	if (ev_is_active (w))
722	return;	1376	return;
723		1377
724	ev_start ((W)w, ++checkcnt);	1378	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
725	array_needsize (checks, checkmax, checkcnt, );
726	checks [checkcnt - 1] = w;
727	}
728
729	void evcheck_stop (struct ev_check *w)
730	{
731	checks [w->active - 1] = checks [--checkcnt];
732	ev_stop ((W)w);	1379	ev_stop (EV_A_ (W)w);
733	}	1380	}
734		1381
735	/*****************************************************************************/	1382	/*****************************************************************************/
736		1383
737	#if 0	1384	struct ev_once
738
739	static void
740	sin_cb (struct ev_io *w, int revents)
741	{	1385	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
743	}
744
745	static void
746	ocb (struct ev_timer *w, int revents)
747	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
749	evtimer_stop (w);
750	evtimer_start (w);
751	}
752
753	static void
754	scb (struct ev_signal *w, int revents)
755	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
757	}
758
759	static void
760	gcb (struct ev_signal *w, int revents)
761	{
762	fprintf (stderr, "generic %x\n", revents);
763	}
764
765	int main (void)
766	{
767	struct ev_io sin;	1386	struct ev_io io;
768
769	ev_init (0);
770
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);
773	evio_start (&sin);
774
775	struct ev_timer t[10000];
776
777	#if 0
778	int i;
779	for (i = 0; i < 10000; ++i)
780	{
781	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);
784	evtimer_start (w);
785	if (drand48 () < 0.5)
786	evtimer_stop (w);
787	}
788	#endif
789
790	struct ev_timer t1;	1387	struct ev_timer to;
791	evw_init (&t1, ocb, 0);	1388	void (cb)(int revents, void arg);
792	evtimer_set_abs (&t1, 5, 10);	1389	void *arg;
793	evtimer_start (&t1);	1390	};
794		1391
795	struct ev_signal sig;	1392	static void
796	evw_init (&sig, scb, 65535);	1393	once_cb (EV_P_ struct ev_once *once, int revents)
797	evsignal_set (&sig, SIGQUIT);	1394	{
798	evsignal_start (&sig);	1395	void (cb)(int revents, void arg) = once->cb;
		1396	void *arg = once->arg;
799		1397
800	struct ev_check cw;	1398	ev_io_stop (EV_A_ &once->io);
801	evw_init (&cw, gcb, 0);	1399	ev_timer_stop (EV_A_ &once->to);
802	evcheck_start (&cw);	1400	free (once);
803		1401
804	struct ev_idle iw;	1402	cb (revents, arg);
805	evw_init (&iw, gcb, 0);
806	evidle_start (&iw);
807
808	ev_loop (0);
809
810	return 0;
811	}	1403	}
812		1404
813	#endif	1405	static void
		1406	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1407	{
		1408	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		1409	}
814		1410
		1411	static void
		1412	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1413	{
		1414	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		1415	}
815		1416
		1417	void
		1418	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		1419	{
		1420	struct ev_once *once = malloc (sizeof (struct ev_once));
816		1421
		1422	if (!once)
		1423	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
		1424	else
		1425	{
		1426	once->cb = cb;
		1427	once->arg = arg;
817		1428
		1429	ev_watcher_init (&once->io, once_cb_io);
		1430	if (fd >= 0)
		1431	{
		1432	ev_io_set (&once->io, fd, events);
		1433	ev_io_start (EV_A_ &once->io);
		1434	}
		1435
		1436	ev_watcher_init (&once->to, once_cb_to);
		1437	if (timeout >= 0.)
		1438	{
		1439	ev_timer_set (&once->to, timeout, 0.);
		1440	ev_timer_start (EV_A_ &once->to);
		1441	}
		1442	}
		1443	}
		1444

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Comparing libev/ev.c (file contents): Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs. Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 2007 UTC