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

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 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>
7		63
8	#include <stdio.h>	64	#include <stdio.h>
9		65
10	#include <assert.h>	66	#include <assert.h>
11	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
12	#include <sys/time.h>	72	#include <sys/time.h>
13	#include <time.h>	73	#include <time.h>
14		74
15	#define HAVE_EPOLL 1	75	/**/
16		76
17	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
18	# ifdef CLOCK_MONOTONIC
19	# 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
20	# endif	102	# endif
21	#endif	103	#endif
22		104
23	#ifndef HAVE_SELECT
24	# define HAVE_SELECT 1
25	#endif
26
27	#ifndef HAVE_EPOLL
28	# define HAVE_EPOLL 0
29	#endif
30
31	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
32	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
33	#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	/**/
34		122
35	#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) */
36	#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 */
37		127
38	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
39		143
40	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
41	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
42	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
43		147
44	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
45	ev_tstamp ev_now;
46	int ev_method;
47		149
48	static int have_monotonic; /* runtime */	150	#if WIN32
49		151	/* note: the comment below could not be substantiated, but what would I care */
50	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
51	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
52	static void (*method_poll)(ev_tstamp timeout);	154	#endif
53		155
54	/*****************************************************************************/	156	/*****************************************************************************/
55		157
56	ev_tstamp	158	typedef struct
		159	{
		160	struct ev_watcher_list *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
57	ev_time (void)	192	ev_time (void)
58	{	193	{
59	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
60	struct timespec ts;	195	struct timespec ts;
61	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
62	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
63	#else	198	#else
64	struct timeval tv;	199	struct timeval tv;
65	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
66	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
67	#endif	202	#endif
68	}	203	}
69		204
70	static ev_tstamp	205	inline ev_tstamp
71	get_clock (void)	206	get_clock (void)
72	{	207	{
73	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
74	if (have_monotonic)	209	if (expect_true (have_monotonic))
75	{	210	{
76	struct timespec ts;	211	struct timespec ts;
77	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
78	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
79	}	214	}
80	#endif	215	#endif
81		216
82	return ev_time ();	217	return ev_time ();
83	}	218	}
84		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
85	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
86	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
87	{ \	230	{ \
88	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
		232	do \
		233	{ \
		234	newcnt = array_roundsize (base, newcnt << 1); \
		235	} \
		236	while ((cnt) > newcnt); \
		237	\
89	base = realloc (base, sizeof (base) (newcnt)); \	238	base = realloc (base, sizeof (base) (newcnt)); \
90	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
91	cur = newcnt; \	240	cur = newcnt; \
92	}	241	}
93		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
94	/*****************************************************************************/	254	/*****************************************************************************/
95		255
96	typedef struct
97	{
98	struct ev_io *head;
99	unsigned char wev, rev; /* want, received event set */
100	} ANFD;
101
102	static ANFD *anfds;
103	static int anfdmax;
104
105	static int *fdchanges;
106	static int fdchangemax, fdchangecnt;
107
108	static void	256	static void
109	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
110	{	258	{
111	while (count--)	259	while (count--)
112	{	260	{
113	base->head = 0;	261	base->head = 0;
114	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
115	++base;	265	++base;
116	}	266	}
117	}	267	}
118		268
119	typedef struct
120	{
121	W w;
122	int events;
123	} ANPENDING;
124
125	static ANPENDING *pendings;
126	static int pendingmax, pendingcnt;
127
128	static void	269	static void
129	event (W w, int events)	270	event (EV_P_ W w, int events)
130	{	271	{
131	if (w->active)	272	if (w->pending)
132	{	273	{
133	w->pending = ++pendingcnt;
134	array_needsize (pendings, pendingmax, pendingcnt, );
135	pendings [pendingcnt - 1].w = w;
136	pendings [pendingcnt - 1].events = events;	274	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
		275	return;
137	}	276	}
138	}
139		277
		278	w->pending = ++pendingcnt [ABSPRI (w)];
		279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		280	pendings [ABSPRI (w)][w->pending - 1].w = w;
		281	pendings [ABSPRI (w)][w->pending - 1].events = events;
		282	}
		283
140	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
141	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
142	{	295	{
143	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
144	struct ev_io *w;	297	struct ev_io *w;
145		298
146	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
147	{	300	{
148	int ev = w->events & events;	301	int ev = w->events & events;
149		302
150	if (ev)	303	if (ev)
151	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
152	}	305	}
153	}	306	}
154		307
		308	/*****************************************************************************/
		309
155	static void	310	static void
156	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
157	{	312	{
158	int i;	313	int i;
159		314
160	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
161	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	close (fd);
		382	fd_kill (EV_A_ fd);
		383	return;
		384	}
		385	}
		386
		387	/* susually called after fork if method needs to re-arm all fds from scratch */
		388	static void
		389	fd_rearm_all (EV_P)
		390	{
		391	int fd;
		392
		393	/* this should be highly optimised to not do anything but set a flag */
		394	for (fd = 0; fd < anfdmax; ++fd)
		395	if (anfds [fd].events)
		396	{
		397	anfds [fd].events = 0;
		398	fd_change (EV_A_ fd);
		399	}
162	}	400	}
163		401
164	/*****************************************************************************/	402	/*****************************************************************************/
165		403
166	static struct ev_timer **timers;
167	static int timermax, timercnt;
168
169	static struct ev_periodic **periodics;
170	static int periodicmax, periodiccnt;
171
172	static void	404	static void
173	upheap (WT *timers, int k)	405	upheap (WT *heap, int k)
174	{	406	{
175	WT w = timers [k];	407	WT w = heap [k];
176		408
177	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
178	{	410	{
179	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
180	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
181	k >>= 1;	413	k >>= 1;
182	}	414	}
183		415
184	timers [k] = w;	416	heap [k] = w;
185	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
186		418
187	}	419	}
188		420
189	static void	421	static void
190	downheap (WT *timers, int N, int k)	422	downheap (WT *heap, int N, int k)
191	{	423	{
192	WT w = timers [k];	424	WT w = heap [k];
193		425
194	while (k < (N >> 1))	426	while (k < (N >> 1))
195	{	427	{
196	int j = k << 1;	428	int j = k << 1;
197		429
198	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
199	++j;	431	++j;
200		432
201	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
202	break;	434	break;
203		435
204	timers [k] = timers [j];	436	heap [k] = heap [j];
205	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
206	k = j;	438	k = j;
207	}	439	}
208		440
209	timers [k] = w;	441	heap [k] = w;
210	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
211	}	443	}
212		444
213	/*****************************************************************************/	445	/*****************************************************************************/
214		446
215	typedef struct	447	typedef struct
216	{	448	{
217	struct ev_signal *head;	449	struct ev_watcher_list *head;
218	sig_atomic_t gotsig;	450	sig_atomic_t volatile gotsig;
219	} ANSIG;	451	} ANSIG;
220		452
221	static ANSIG *signals;	453	static ANSIG *signals;
222	static int signalmax;	454	static int signalmax;
223		455
224	static int sigpipe [2];	456	static int sigpipe [2];
225	static sig_atomic_t gotsig;	457	static sig_atomic_t volatile gotsig;
226	static struct ev_io sigev;	458	static struct ev_io sigev;
227		459
228	static void	460	static void
229	signals_init (ANSIG *base, int count)	461	signals_init (ANSIG *base, int count)
230	{	462	{
231	while (count--)	463	while (count--)
232	{	464	{
233	base->head = 0;	465	base->head = 0;
234	base->gotsig = 0;	466	base->gotsig = 0;
		467
235	++base;	468	++base;
236	}	469	}
237	}	470	}
238		471
239	static void	472	static void
240	sighandler (int signum)	473	sighandler (int signum)
241	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
242	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
243		480
244	if (!gotsig)	481	if (!gotsig)
245	{	482	{
		483	int old_errno = errno;
246	gotsig = 1;	484	gotsig = 1;
247	write (sigpipe [1], &gotsig, 1);	485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
248	}	487	}
249	}	488	}
250		489
251	static void	490	static void
252	sigcb (struct ev_io *iow, int revents)	491	sigcb (EV_P_ struct ev_io *iow, int revents)
253	{	492	{
254	struct ev_signal *w;	493	struct ev_watcher_list *w;
255	int sig;	494	int signum;
256		495
		496	read (sigpipe [0], &revents, 1);
257	gotsig = 0;	497	gotsig = 0;
258	read (sigpipe [0], &revents, 1);
259		498
260	for (sig = signalmax; sig--; )	499	for (signum = signalmax; signum--; )
261	if (signals [sig].gotsig)	500	if (signals [signum].gotsig)
262	{	501	{
263	signals [sig].gotsig = 0;	502	signals [signum].gotsig = 0;
264		503
265	for (w = signals [sig].head; w; w = w->next)	504	for (w = signals [signum].head; w; w = w->next)
266	event ((W)w, EV_SIGNAL);	505	event (EV_A_ (W)w, EV_SIGNAL);
267	}	506	}
268	}	507	}
269		508
270	static void	509	static void
271	siginit (void)	510	siginit (EV_P)
272	{	511	{
		512	#ifndef WIN32
273	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
274	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
275		515
276	/* rather than sort out wether we really need nb, set it */	516	/* rather than sort out wether we really need nb, set it */
277	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
278	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
279		520
280	evio_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
281	evio_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
282	}	524	}
283		525
284	/*****************************************************************************/	526	/*****************************************************************************/
285		527
286	static struct ev_idle **idles;	528	#ifndef WIN32
287	static int idlemax, idlecnt;
288		529
289	static struct ev_check **checks;	530	static struct ev_child *childs [PID_HASHSIZE];
290	static int checkmax, checkcnt;	531	static struct ev_signal childev;
		532
		533	#ifndef WCONTINUED
		534	# define WCONTINUED 0
		535	#endif
		536
		537	static void
		538	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		539	{
		540	struct ev_child *w;
		541
		542	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		543	if (w->pid == pid \|\| !w->pid)
		544	{
		545	ev_priority (w) = ev_priority (sw); /* need to do it now */
		546	w->rpid = pid;
		547	w->rstatus = status;
		548	event (EV_A_ (W)w, EV_CHILD);
		549	}
		550	}
		551
		552	static void
		553	childcb (EV_P_ struct ev_signal *sw, int revents)
		554	{
		555	int pid, status;
		556
		557	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
		558	{
		559	/* make sure we are called again until all childs have been reaped */
		560	event (EV_A_ (W)sw, EV_SIGNAL);
		561
		562	child_reap (EV_A_ sw, pid, pid, status);
		563	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		564	}
		565	}
		566
		567	#endif
291		568
292	/*****************************************************************************/	569	/*****************************************************************************/
293		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
294	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
295	# include "ev_epoll.c"	575	# include "ev_epoll.c"
296	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
297	#if HAVE_SELECT	580	#if EV_USE_SELECT
298	# include "ev_select.c"	581	# include "ev_select.c"
299	#endif	582	#endif
300		583
301	int ev_init (int flags)	584	int
		585	ev_version_major (void)
302	{	586	{
		587	return EV_VERSION_MAJOR;
		588	}
		589
		590	int
		591	ev_version_minor (void)
		592	{
		593	return EV_VERSION_MINOR;
		594	}
		595
		596	/* return true if we are running with elevated privileges and should ignore env variables */
		597	static int
		598	enable_secure (void)
		599	{
		600	#ifdef WIN32
		601	return 0;
		602	#else
		603	return getuid () != geteuid ()
		604	\|\| getgid () != getegid ();
		605	#endif
		606	}
		607
		608	int
		609	ev_method (EV_P)
		610	{
		611	return method;
		612	}
		613
		614	static void
		615	loop_init (EV_P_ int methods)
		616	{
		617	if (!method)
		618	{
303	#if HAVE_MONOTONIC	619	#if EV_USE_MONOTONIC
304	{	620	{
305	struct timespec ts;	621	struct timespec ts;
306	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
307	have_monotonic = 1;	623	have_monotonic = 1;
308	}	624	}
309	#endif	625	#endif
310		626
311	ev_now = ev_time ();	627	rt_now = ev_time ();
312	now = get_clock ();	628	mn_now = get_clock ();
313	diff = ev_now - now;	629	now_floor = mn_now;
		630	rtmn_diff = rt_now - mn_now;
314		631
		632	if (methods == EVMETHOD_AUTO)
		633	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		634	methods = atoi (getenv ("LIBEV_METHODS"));
		635	else
		636	methods = EVMETHOD_ANY;
		637
		638	method = 0;
		639	#if EV_USE_WIN32
		640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		647	#endif
		648	#if EV_USE_POLL
		649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		653	#endif
		654	}
		655	}
		656
		657	void
		658	loop_destroy (EV_P)
		659	{
		660	int i;
		661
		662	#if EV_USE_WIN32
		663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		664	#endif
		665	#if EV_USE_KQUEUE
		666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		667	#endif
		668	#if EV_USE_EPOLL
		669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		670	#endif
		671	#if EV_USE_POLL
		672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		673	#endif
		674	#if EV_USE_SELECT
		675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		676	#endif
		677
		678	for (i = NUMPRI; i--; )
		679	array_free (pending, [i]);
		680
		681	array_free (fdchange, );
		682	array_free (timer, );
		683	array_free (periodic, );
		684	array_free (idle, );
		685	array_free (prepare, );
		686	array_free (check, );
		687
		688	method = 0;
		689	/TODO/
		690	}
		691
		692	void
		693	loop_fork (EV_P)
		694	{
		695	/TODO/
		696	#if EV_USE_EPOLL
		697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		698	#endif
		699	#if EV_USE_KQUEUE
		700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		701	#endif
		702	}
		703
		704	#if EV_MULTIPLICITY
		705	struct ev_loop *
		706	ev_loop_new (int methods)
		707	{
		708	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		709
		710	loop_init (EV_A_ methods);
		711
		712	if (ev_method (EV_A))
		713	return loop;
		714
		715	return 0;
		716	}
		717
		718	void
		719	ev_loop_destroy (EV_P)
		720	{
		721	loop_destroy (EV_A);
		722	free (loop);
		723	}
		724
		725	void
		726	ev_loop_fork (EV_P)
		727	{
		728	loop_fork (EV_A);
		729	}
		730
		731	#endif
		732
		733	#if EV_MULTIPLICITY
		734	struct ev_loop default_loop_struct;
		735	static struct ev_loop *default_loop;
		736
		737	struct ev_loop *
		738	#else
		739	static int default_loop;
		740
		741	int
		742	#endif
		743	ev_default_loop (int methods)
		744	{
		745	if (sigpipe [0] == sigpipe [1])
315	if (pipe (sigpipe))	746	if (pipe (sigpipe))
316	return 0;	747	return 0;
317		748
318	ev_method = EVMETHOD_NONE;	749	if (!default_loop)
319	#if HAVE_EPOLL
320	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
321	#endif
322	#if HAVE_SELECT
323	if (ev_method == EVMETHOD_NONE) select_init (flags);
324	#endif
325
326	if (ev_method)
327	{	750	{
		751	#if EV_MULTIPLICITY
		752	struct ev_loop *loop = default_loop = &default_loop_struct;
		753	#else
		754	default_loop = 1;
		755	#endif
		756
		757	loop_init (EV_A_ methods);
		758
		759	if (ev_method (EV_A))
		760	{
328	evw_init (&sigev, sigcb);	761	ev_watcher_init (&sigev, sigcb);
		762	ev_set_priority (&sigev, EV_MAXPRI);
329	siginit ();	763	siginit (EV_A);
330	}
331		764
332	return ev_method;	765	#ifndef WIN32
333	}	766	ev_signal_init (&childev, childcb, SIGCHLD);
334		767	ev_set_priority (&childev, EV_MAXPRI);
335	/*****************************************************************************/	768	ev_signal_start (EV_A_ &childev);
336		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
337	void ev_prefork (void)
338	{
339	/* nop */
340	}
341
342	void ev_postfork_parent (void)
343	{
344	/* nop */
345	}
346
347	void ev_postfork_child (void)
348	{
349	#if HAVE_EPOLL
350	if (ev_method == EVMETHOD_EPOLL)
351	epoll_postfork_child ();
352	#endif	770	#endif
		771	}
		772	else
		773	default_loop = 0;
		774	}
353		775
		776	return default_loop;
		777	}
		778
		779	void
		780	ev_default_destroy (void)
		781	{
		782	#if EV_MULTIPLICITY
		783	struct ev_loop *loop = default_loop;
		784	#endif
		785
		786	ev_ref (EV_A); /* child watcher */
		787	ev_signal_stop (EV_A_ &childev);
		788
		789	ev_ref (EV_A); /* signal watcher */
354	evio_stop (&sigev);	790	ev_io_stop (EV_A_ &sigev);
		791
		792	close (sigpipe [0]); sigpipe [0] = 0;
		793	close (sigpipe [1]); sigpipe [1] = 0;
		794
		795	loop_destroy (EV_A);
		796	}
		797
		798	void
		799	ev_default_fork (void)
		800	{
		801	#if EV_MULTIPLICITY
		802	struct ev_loop *loop = default_loop;
		803	#endif
		804
		805	loop_fork (EV_A);
		806
		807	ev_io_stop (EV_A_ &sigev);
355	close (sigpipe [0]);	808	close (sigpipe [0]);
356	close (sigpipe [1]);	809	close (sigpipe [1]);
357	pipe (sigpipe);	810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
358	siginit ();	813	siginit (EV_A);
359	}	814	}
360		815
361	/*****************************************************************************/	816	/*****************************************************************************/
362		817
363	static void	818	static void
364	fd_reify (void)	819	call_pending (EV_P)
365	{	820	{
366	int i;	821	int pri;
367		822
368	for (i = 0; i < fdchangecnt; ++i)	823	for (pri = NUMPRI; pri--; )
369	{	824	while (pendingcnt [pri])
370	int fd = fdchanges [i];
371	ANFD *anfd = anfds + fd;
372	struct ev_io *w;
373
374	int wev = 0;
375
376	for (w = anfd->head; w; w = w->next)
377	wev \|= w->events;
378
379	if (anfd->wev != wev)
380	{	825	{
381	method_modify (fd, anfd->wev, wev);	826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
382	anfd->wev = wev;
383	}
384	}
385		827
386	fdchangecnt = 0;
387	}
388
389	static void
390	call_pending ()
391	{
392	int i;
393
394	for (i = 0; i < pendingcnt; ++i)
395	{
396	ANPENDING *p = pendings + i;
397
398	if (p->w)	828	if (p->w)
399	{	829	{
400	p->w->pending = 0;	830	p->w->pending = 0;
401	p->w->cb (p->w, p->events);	831	p->w->cb (EV_A_ p->w, p->events);
402	}	832	}
403	}	833	}
404
405	pendingcnt = 0;
406	}	834	}
407		835
408	static void	836	static void
409	timers_reify ()	837	timers_reify (EV_P)
410	{	838	{
411	while (timercnt && timers [0]->at <= now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
412	{	840	{
413	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
414		842
415	event ((W)w, EV_TIMEOUT);	843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
416		844
417	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
418	if (w->repeat)	846	if (w->repeat)
419	{	847	{
		848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
420	w->at = now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
421	assert (("timer timeout in the past, negative repeat?", w->at > now));
422	downheap ((WT *)timers, timercnt, 0);	850	downheap ((WT *)timers, timercnt, 0);
423	}	851	}
424	else	852	else
425	evtimer_stop (w); /* nonrepeating: stop timer */	853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
426	}
427	}
428		854
		855	event (EV_A_ (W)w, EV_TIMEOUT);
		856	}
		857	}
		858
429	static void	859	static void
430	periodics_reify ()	860	periodics_reify (EV_P)
431	{	861	{
432	while (periodiccnt && periodics [0]->at <= ev_now)	862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
433	{	863	{
434	struct ev_periodic *w = periodics [0];	864	struct ev_periodic *w = periodics [0];
		865
		866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
435		867
436	/* first reschedule or stop timer */	868	/* first reschedule or stop timer */
437	if (w->interval)	869	if (w->interval)
438	{	870	{
439	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
440	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
441	downheap ((WT *)periodics, periodiccnt, 0);	873	downheap ((WT *)periodics, periodiccnt, 0);
442	}	874	}
443	else	875	else
444	evperiodic_stop (w); /* nonrepeating: stop timer */	876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
445		877
446	event ((W)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
447	}	879	}
448	}	880	}
449		881
450	static void	882	static void
451	periodics_reschedule (ev_tstamp diff)	883	periodics_reschedule (EV_P)
452	{	884	{
453	int i;	885	int i;
454		886
455	/* adjust periodics after time jump */	887	/* adjust periodics after time jump */
456	for (i = 0; i < periodiccnt; ++i)	888	for (i = 0; i < periodiccnt; ++i)
457	{	889	{
458	struct ev_periodic *w = periodics [i];	890	struct ev_periodic *w = periodics [i];
459		891
460	if (w->interval)	892	if (w->interval)
461	{	893	{
462	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
463		895
464	if (fabs (diff) >= 1e-4)	896	if (fabs (diff) >= 1e-4)
465	{	897	{
466	evperiodic_stop (w);	898	ev_periodic_stop (EV_A_ w);
467	evperiodic_start (w);	899	ev_periodic_start (EV_A_ w);
468		900
469	i = 0; /* restart loop, inefficient, but time jumps should be rare */	901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
470	}	902	}
471	}	903	}
472	}	904	}
473	}	905	}
474		906
		907	inline int
		908	time_update_monotonic (EV_P)
		909	{
		910	mn_now = get_clock ();
		911
		912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		913	{
		914	rt_now = rtmn_diff + mn_now;
		915	return 0;
		916	}
		917	else
		918	{
		919	now_floor = mn_now;
		920	rt_now = ev_time ();
		921	return 1;
		922	}
		923	}
		924
475	static void	925	static void
476	time_update ()	926	time_update (EV_P)
477	{	927	{
478	int i;	928	int i;
479		929
480	ev_now = ev_time ();	930	#if EV_USE_MONOTONIC
481
482	if (have_monotonic)	931	if (expect_true (have_monotonic))
483	{	932	{
484	ev_tstamp odiff = diff;	933	if (time_update_monotonic (EV_A))
485
486	for (i = 4; --i; ) /* loop a few times, before making important decisions */
487	{	934	{
488	now = get_clock ();	935	ev_tstamp odiff = rtmn_diff;
		936
		937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		938	{
489	diff = ev_now - now;	939	rtmn_diff = rt_now - mn_now;
490		940
491	if (fabs (odiff - diff) < MIN_TIMEJUMP)	941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
492	return; /* all is well */	942	return; /* all is well */
493		943
494	ev_now = ev_time ();	944	rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	}
		948
		949	periodics_reschedule (EV_A);
		950	/* no timer adjustment, as the monotonic clock doesn't jump */
		951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
495	}	952	}
496
497	periodics_reschedule (diff - odiff);
498	/* no timer adjustment, as the monotonic clock doesn't jump */
499	}	953	}
500	else	954	else
		955	#endif
501	{	956	{
502	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	957	rt_now = ev_time ();
		958
		959	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
503	{	960	{
504	periodics_reschedule (ev_now - now);	961	periodics_reschedule (EV_A);
505		962
506	/* adjust timers. this is easy, as the offset is the same for all */	963	/* adjust timers. this is easy, as the offset is the same for all */
507	for (i = 0; i < timercnt; ++i)	964	for (i = 0; i < timercnt; ++i)
508	timers [i]->at += diff;	965	((WT)timers [i])->at += rt_now - mn_now;
509	}	966	}
510		967
511	now = ev_now;	968	mn_now = rt_now;
512	}	969	}
513	}	970	}
514		971
515	int ev_loop_done;	972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
516		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
517	void ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
518	{	988	{
519	double block;	989	double block;
520	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	990	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
521
522	if (checkcnt)
523	{
524	queue_events ((W *)checks, checkcnt, EV_CHECK);
525	call_pending ();
526	}
527		991
528	do	992	do
529	{	993	{
		994	/* queue check watchers (and execute them) */
		995	if (expect_false (preparecnt))
		996	{
		997	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		998	call_pending (EV_A);
		999	}
		1000
530	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
531	fd_reify ();	1002	fd_reify (EV_A);
532		1003
533	/* calculate blocking time */	1004	/* calculate blocking time */
534		1005
535	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	1006	/* we only need this for !monotonic clockor timers, but as we basically
		1007	always have timers, we just calculate it always */
		1008	#if EV_USE_MONOTONIC
		1009	if (expect_true (have_monotonic))
		1010	time_update_monotonic (EV_A);
		1011	else
		1012	#endif
		1013	{
536	ev_now = ev_time ();	1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
537		1017
538	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1018	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
539	block = 0.;	1019	block = 0.;
540	else	1020	else
541	{	1021	{
542	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
543		1023
544	if (timercnt)	1024	if (timercnt)
545	{	1025	{
546	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
547	if (block > to) block = to;	1027	if (block > to) block = to;
548	}	1028	}
549		1029
550	if (periodiccnt)	1030	if (periodiccnt)
551	{	1031	{
552	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
553	if (block > to) block = to;	1033	if (block > to) block = to;
554	}	1034	}
555		1035
556	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
557	}	1037	}
558		1038
559	method_poll (block);	1039	method_poll (EV_A_ block);
560		1040
561	/* update ev_now, do magic */	1041	/* update rt_now, do magic */
562	time_update ();	1042	time_update (EV_A);
563		1043
564	/* queue pending timers and reschedule them */	1044	/* queue pending timers and reschedule them */
		1045	timers_reify (EV_A); /* relative timers called last */
565	periodics_reify (); /* absolute timers first */	1046	periodics_reify (EV_A); /* absolute timers called first */
566	timers_reify (); /* relative timers second */
567		1047
568	/* queue idle watchers unless io or timers are pending */	1048	/* queue idle watchers unless io or timers are pending */
569	if (!pendingcnt)	1049	if (!pendingcnt)
570	queue_events ((W *)idles, idlecnt, EV_IDLE);	1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
571		1051
572	/* queue check and possibly idle watchers */	1052	/* queue check watchers, to be executed first */
		1053	if (checkcnt)
573	queue_events ((W *)checks, checkcnt, EV_CHECK);	1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
574		1055
575	call_pending ();	1056	call_pending (EV_A);
576	}	1057	}
577	while (!ev_loop_done);	1058	while (activecnt && !loop_done);
578		1059
579	if (ev_loop_done != 2)	1060	if (loop_done != 2)
580	ev_loop_done = 0;	1061	loop_done = 0;
		1062	}
		1063
		1064	void
		1065	ev_unloop (EV_P_ int how)
		1066	{
		1067	loop_done = how;
581	}	1068	}
582		1069
583	/*****************************************************************************/	1070	/*****************************************************************************/
584		1071
585	static void	1072	inline void
586	wlist_add (WL *head, WL elem)	1073	wlist_add (WL *head, WL elem)
587	{	1074	{
588	elem->next = *head;	1075	elem->next = *head;
589	*head = elem;	1076	*head = elem;
590	}	1077	}
591		1078
592	static void	1079	inline void
593	wlist_del (WL *head, WL elem)	1080	wlist_del (WL *head, WL elem)
594	{	1081	{
595	while (*head)	1082	while (*head)
596	{	1083	{
597	if (*head == elem)	1084	if (*head == elem)
…		…
602		1089
603	head = &(*head)->next;	1090	head = &(*head)->next;
604	}	1091	}
605	}	1092	}
606		1093
607	static void	1094	inline void
608	ev_clear (W w)	1095	ev_clear_pending (EV_P_ W w)
609	{	1096	{
610	if (w->pending)	1097	if (w->pending)
611	{	1098	{
612	pendings [w->pending - 1].w = 0;	1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;
613	w->pending = 0;	1100	w->pending = 0;
614	}	1101	}
615	}	1102	}
616		1103
617	static void	1104	inline void
618	ev_start (W w, int active)	1105	ev_start (EV_P_ W w, int active)
619	{	1106	{
		1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1109
620	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
621	}	1112	}
622		1113
623	static void	1114	inline void
624	ev_stop (W w)	1115	ev_stop (EV_P_ W w)
625	{	1116	{
		1117	ev_unref (EV_A);
626	w->active = 0;	1118	w->active = 0;
627	}	1119	}
628		1120
629	/*****************************************************************************/	1121	/*****************************************************************************/
630		1122
631	void	1123	void
632	evio_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
633	{	1125	{
		1126	int fd = w->fd;
		1127
634	if (ev_is_active (w))	1128	if (ev_is_active (w))
635	return;	1129	return;
636		1130
637	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
638		1132
639	ev_start ((W)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
640	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
641	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
642		1136
643	++fdchangecnt;	1137	fd_change (EV_A_ fd);
644	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
645	fdchanges [fdchangecnt - 1] = fd;
646	}	1138	}
647		1139
648	void	1140	void
649	evio_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
650	{	1142	{
651	ev_clear ((W)w);	1143	ev_clear_pending (EV_A_ (W)w);
652	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
653	return;	1145	return;
654		1146
655	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
656	ev_stop ((W)w);	1148	ev_stop (EV_A_ (W)w);
657		1149
658	++fdchangecnt;	1150	fd_change (EV_A_ w->fd);
659	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
660	fdchanges [fdchangecnt - 1] = w->fd;
661	}	1151	}
662		1152
663	void	1153	void
664	evtimer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
665	{	1155	{
666	if (ev_is_active (w))	1156	if (ev_is_active (w))
667	return;	1157	return;
668		1158
669	w->at += now;	1159	((WT)w)->at += mn_now;
670		1160
671	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
672		1162
673	ev_start ((W)w, ++timercnt);	1163	ev_start (EV_A_ (W)w, ++timercnt);
674	array_needsize (timers, timermax, timercnt, );	1164	array_needsize (timers, timermax, timercnt, );
675	timers [timercnt - 1] = w;	1165	timers [timercnt - 1] = w;
676	upheap ((WT *)timers, timercnt - 1);	1166	upheap ((WT *)timers, timercnt - 1);
677	}
678		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
679	void	1171	void
680	evtimer_stop (struct ev_timer *w)	1172	ev_timer_stop (EV_P_ struct ev_timer *w)
681	{	1173	{
682	ev_clear ((W)w);	1174	ev_clear_pending (EV_A_ (W)w);
683	if (!ev_is_active (w))	1175	if (!ev_is_active (w))
684	return;	1176	return;
685		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
686	if (w->active < timercnt--)	1180	if (((W)w)->active < timercnt--)
687	{	1181	{
688	timers [w->active - 1] = timers [timercnt];	1182	timers [((W)w)->active - 1] = timers [timercnt];
689	downheap ((WT *)timers, timercnt, w->active - 1);	1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
690	}	1184	}
691		1185
692	w->at = w->repeat;	1186	((WT)w)->at = w->repeat;
693		1187
694	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
695	}	1189	}
696		1190
697	void	1191	void
698	evtimer_again (struct ev_timer *w)	1192	ev_timer_again (EV_P_ struct ev_timer *w)
699	{	1193	{
700	if (ev_is_active (w))	1194	if (ev_is_active (w))
701	{	1195	{
702	if (w->repeat)	1196	if (w->repeat)
703	{	1197	{
704	w->at = now + w->repeat;	1198	((WT)w)->at = mn_now + w->repeat;
705	downheap ((WT *)timers, timercnt, w->active - 1);	1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
706	}	1200	}
707	else	1201	else
708	evtimer_stop (w);	1202	ev_timer_stop (EV_A_ w);
709	}	1203	}
710	else if (w->repeat)	1204	else if (w->repeat)
711	evtimer_start (w);	1205	ev_timer_start (EV_A_ w);
712	}	1206	}
713		1207
714	void	1208	void
715	evperiodic_start (struct ev_periodic *w)	1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
716	{	1210	{
717	if (ev_is_active (w))	1211	if (ev_is_active (w))
718	return;	1212	return;
719		1213
720	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
721		1215
722	/* this formula differs from the one in periodic_reify because we do not always round up */	1216	/* this formula differs from the one in periodic_reify because we do not always round up */
723	if (w->interval)	1217	if (w->interval)
724	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
725		1219
726	ev_start ((W)w, ++periodiccnt);	1220	ev_start (EV_A_ (W)w, ++periodiccnt);
727	array_needsize (periodics, periodicmax, periodiccnt, );	1221	array_needsize (periodics, periodicmax, periodiccnt, );
728	periodics [periodiccnt - 1] = w;	1222	periodics [periodiccnt - 1] = w;
729	upheap ((WT *)periodics, periodiccnt - 1);	1223	upheap ((WT *)periodics, periodiccnt - 1);
730	}
731		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1226	}
		1227
732	void	1228	void
733	evperiodic_stop (struct ev_periodic *w)	1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
734	{	1230	{
735	ev_clear ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
736	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
737	return;	1233	return;
738		1234
		1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1236
739	if (w->active < periodiccnt--)	1237	if (((W)w)->active < periodiccnt--)
740	{	1238	{
741	periodics [w->active - 1] = periodics [periodiccnt];	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
742	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
743	}	1241	}
744		1242
745	ev_stop ((W)w);	1243	ev_stop (EV_A_ (W)w);
746	}	1244	}
747		1245
748	void	1246	void
749	evsignal_start (struct ev_signal *w)	1247	ev_idle_start (EV_P_ struct ev_idle *w)
750	{	1248	{
751	if (ev_is_active (w))	1249	if (ev_is_active (w))
752	return;	1250	return;
753		1251
		1252	ev_start (EV_A_ (W)w, ++idlecnt);
		1253	array_needsize (idles, idlemax, idlecnt, );
		1254	idles [idlecnt - 1] = w;
		1255	}
		1256
		1257	void
		1258	ev_idle_stop (EV_P_ struct ev_idle *w)
		1259	{
		1260	ev_clear_pending (EV_A_ (W)w);
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	idles [((W)w)->active - 1] = idles [--idlecnt];
		1265	ev_stop (EV_A_ (W)w);
		1266	}
		1267
		1268	void
		1269	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1270	{
		1271	if (ev_is_active (w))
		1272	return;
		1273
		1274	ev_start (EV_A_ (W)w, ++preparecnt);
		1275	array_needsize (prepares, preparemax, preparecnt, );
		1276	prepares [preparecnt - 1] = w;
		1277	}
		1278
		1279	void
		1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1281	{
		1282	ev_clear_pending (EV_A_ (W)w);
		1283	if (ev_is_active (w))
		1284	return;
		1285
		1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1287	ev_stop (EV_A_ (W)w);
		1288	}
		1289
		1290	void
		1291	ev_check_start (EV_P_ struct ev_check *w)
		1292	{
		1293	if (ev_is_active (w))
		1294	return;
		1295
		1296	ev_start (EV_A_ (W)w, ++checkcnt);
		1297	array_needsize (checks, checkmax, checkcnt, );
		1298	checks [checkcnt - 1] = w;
		1299	}
		1300
		1301	void
		1302	ev_check_stop (EV_P_ struct ev_check *w)
		1303	{
		1304	ev_clear_pending (EV_A_ (W)w);
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	checks [((W)w)->active - 1] = checks [--checkcnt];
		1309	ev_stop (EV_A_ (W)w);
		1310	}
		1311
		1312	#ifndef SA_RESTART
		1313	# define SA_RESTART 0
		1314	#endif
		1315
		1316	void
		1317	ev_signal_start (EV_P_ struct ev_signal *w)
		1318	{
		1319	#if EV_MULTIPLICITY
		1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1321	#endif
		1322	if (ev_is_active (w))
		1323	return;
		1324
		1325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1326
754	ev_start ((W)w, 1);	1327	ev_start (EV_A_ (W)w, 1);
755	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
757		1330
758	if (!w->next)	1331	if (!((WL)w)->next)
759	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
760	struct sigaction sa;	1336	struct sigaction sa;
761	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
762	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
763	sa.sa_flags = 0;	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
764	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
765	}	1342	}
766	}	1343	}
767		1344
768	void	1345	void
769	evsignal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
770	{	1347	{
771	ev_clear ((W)w);	1348	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
773	return;	1350	return;
774		1351
775	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
776	ev_stop ((W)w);	1353	ev_stop (EV_A_ (W)w);
777		1354
778	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
779	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
780	}	1357	}
781		1358
782	void evidle_start (struct ev_idle *w)	1359	void
		1360	ev_child_start (EV_P_ struct ev_child *w)
783	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
784	if (ev_is_active (w))	1365	if (ev_is_active (w))
785	return;	1366	return;
786		1367
787	ev_start ((W)w, ++idlecnt);	1368	ev_start (EV_A_ (W)w, 1);
788	array_needsize (idles, idlemax, idlecnt, );	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
789	idles [idlecnt - 1] = w;
790	}	1370	}
791		1371
792	void evidle_stop (struct ev_idle *w)	1372	void
		1373	ev_child_stop (EV_P_ struct ev_child *w)
793	{	1374	{
794	ev_clear ((W)w);	1375	ev_clear_pending (EV_A_ (W)w);
795	if (ev_is_active (w))	1376	if (ev_is_active (w))
796	return;	1377	return;
797		1378
798	idles [w->active - 1] = idles [--idlecnt];	1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
799	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
800	}
801
802	void evcheck_start (struct ev_check *w)
803	{
804	if (ev_is_active (w))
805	return;
806
807	ev_start ((W)w, ++checkcnt);
808	array_needsize (checks, checkmax, checkcnt, );
809	checks [checkcnt - 1] = w;
810	}
811
812	void evcheck_stop (struct ev_check *w)
813	{
814	ev_clear ((W)w);
815	if (ev_is_active (w))
816	return;
817
818	checks [w->active - 1] = checks [--checkcnt];
819	ev_stop ((W)w);
820	}	1381	}
821		1382
822	/*****************************************************************************/	1383	/*****************************************************************************/
823		1384
824	struct ev_once	1385	struct ev_once
…		…
828	void (cb)(int revents, void arg);	1389	void (cb)(int revents, void arg);
829	void *arg;	1390	void *arg;
830	};	1391	};
831		1392
832	static void	1393	static void
833	once_cb (struct ev_once *once, int revents)	1394	once_cb (EV_P_ struct ev_once *once, int revents)
834	{	1395	{
835	void (cb)(int revents, void arg) = once->cb;	1396	void (cb)(int revents, void arg) = once->cb;
836	void *arg = once->arg;	1397	void *arg = once->arg;
837		1398
838	evio_stop (&once->io);	1399	ev_io_stop (EV_A_ &once->io);
839	evtimer_stop (&once->to);	1400	ev_timer_stop (EV_A_ &once->to);
840	free (once);	1401	free (once);
841		1402
842	cb (revents, arg);	1403	cb (revents, arg);
843	}	1404	}
844		1405
845	static void	1406	static void
846	once_cb_io (struct ev_io *w, int revents)	1407	once_cb_io (EV_P_ struct ev_io *w, int revents)
847	{	1408	{
848	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1409	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
849	}	1410	}
850		1411
851	static void	1412	static void
852	once_cb_to (struct ev_timer *w, int revents)	1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)
853	{	1414	{
854	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1415	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
855	}	1416	}
856		1417
857	void	1418	void
858	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
859	{	1420	{
860	struct ev_once *once = malloc (sizeof (struct ev_once));	1421	struct ev_once *once = malloc (sizeof (struct ev_once));
861		1422
862	if (!once)	1423	if (!once)
863	cb (EV_ERROR, arg);	1424	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
864	else	1425	else
865	{	1426	{
866	once->cb = cb;	1427	once->cb = cb;
867	once->arg = arg;	1428	once->arg = arg;
868		1429
869	evw_init (&once->io, once_cb_io);	1430	ev_watcher_init (&once->io, once_cb_io);
870
871	if (fd >= 0)	1431	if (fd >= 0)
872	{	1432	{
873	evio_set (&once->io, fd, events);	1433	ev_io_set (&once->io, fd, events);
874	evio_start (&once->io);	1434	ev_io_start (EV_A_ &once->io);
875	}	1435	}
876		1436
877	evw_init (&once->to, once_cb_to);	1437	ev_watcher_init (&once->to, once_cb_to);
878
879	if (timeout >= 0.)	1438	if (timeout >= 0.)
880	{	1439	{
881	evtimer_set (&once->to, timeout, 0.);	1440	ev_timer_set (&once->to, timeout, 0.);
882	evtimer_start (&once->to);	1441	ev_timer_start (EV_A_ &once->to);
883	}	1442	}
884	}	1443	}
885	}	1444	}
886		1445
887	/*****************************************************************************/
888
889	#if 0
890
891	struct ev_io wio;
892
893	static void
894	sin_cb (struct ev_io *w, int revents)
895	{
896	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
897	}
898
899	static void
900	ocb (struct ev_timer *w, int revents)
901	{
902	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
903	evtimer_stop (w);
904	evtimer_start (w);
905	}
906
907	static void
908	scb (struct ev_signal *w, int revents)
909	{
910	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
911	evio_stop (&wio);
912	evio_start (&wio);
913	}
914
915	static void
916	gcb (struct ev_signal *w, int revents)
917	{
918	fprintf (stderr, "generic %x\n", revents);
919
920	}
921
922	int main (void)
923	{
924	ev_init (0);
925
926	evio_init (&wio, sin_cb, 0, EV_READ);
927	evio_start (&wio);
928
929	struct ev_timer t[10000];
930
931	#if 0
932	int i;
933	for (i = 0; i < 10000; ++i)
934	{
935	struct ev_timer *w = t + i;
936	evw_init (w, ocb, i);
937	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
938	evtimer_start (w);
939	if (drand48 () < 0.5)
940	evtimer_stop (w);
941	}
942	#endif
943
944	struct ev_timer t1;
945	evtimer_init (&t1, ocb, 5, 10);
946	evtimer_start (&t1);
947
948	struct ev_signal sig;
949	evsignal_init (&sig, scb, SIGQUIT);
950	evsignal_start (&sig);
951
952	struct ev_check cw;
953	evcheck_init (&cw, gcb);
954	evcheck_start (&cw);
955
956	struct ev_idle iw;
957	evidle_init (&iw, gcb);
958	evidle_start (&iw);
959
960	ev_loop (0);
961
962	return 0;
963	}
964
965	#endif
966
967
968
969

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Comparing libev/ev.c (file contents): Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs. Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.16 by root, Wed Oct 31 13:57:34 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 2007 UTC