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Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.67 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>
		62	#include <stddef.h>
6		63
7	#include <stdio.h>	64	#include <stdio.h>
8		65
9	#include <assert.h>	66	#include <assert.h>
10	#include <errno.h>	67	#include <errno.h>
		68	#include <sys/types.h>
		69	#ifndef WIN32
		70	# include <sys/wait.h>
		71	#endif
11	#include <sys/time.h>	72	#include <sys/time.h>
12	#include <time.h>	73	#include <time.h>
13		74
14	#define HAVE_EPOLL 1	75	/**/
15		76
16	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
17	# ifdef CLOCK_MONOTONIC
18	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
19	# endif	102	# endif
20	#endif	103	#endif
21		104
22	#ifndef HAVE_SELECT
23	# define HAVE_SELECT 1
24	#endif
25
26	#ifndef HAVE_EPOLL
27	# define HAVE_EPOLL 0
28	#endif
29
30	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
32	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
33		122
34	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
35	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
36		127
37	#include "ev.h"	128	#include "ev.h"
38		129
39	struct ev_watcher {	130	#if __GNUC__ >= 3
40	EV_WATCHER (ev_watcher);	131	# define expect(expr,value) __builtin_expect ((expr),(value))
41	};	132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
42		137
43	struct ev_watcher_list {	138	#define expect_false(expr) expect ((expr) != 0, 0)
44	EV_WATCHER_LIST (ev_watcher_list);	139	#define expect_true(expr) expect ((expr) != 0, 1)
45	};
46		140
47	struct ev_watcher_time {	141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48	EV_WATCHER_TIME (ev_watcher_time);	142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49	};
50		143
51	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
52	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
53	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
54		147
55	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
56	ev_tstamp ev_now;
57	int ev_method;
58		149
59	static int have_monotonic; /* runtime */	150	#if WIN32
60		151	/* note: the comment below could not be substantiated, but what would I care */
61	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
62	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
63	static void (*method_poll)(ev_tstamp timeout);	154	#endif
64		155
65	/*****************************************************************************/	156	/*****************************************************************************/
66		157
67	ev_tstamp	158	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
68	ev_time (void)	192	ev_time (void)
69	{	193	{
70	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
71	struct timespec ts;	195	struct timespec ts;
72	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
73	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
74	#else	198	#else
75	struct timeval tv;	199	struct timeval tv;
76	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
77	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
78	#endif	202	#endif
79	}	203	}
80		204
81	static ev_tstamp	205	inline ev_tstamp
82	get_clock (void)	206	get_clock (void)
83	{	207	{
84	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
85	if (have_monotonic)	209	if (expect_true (have_monotonic))
86	{	210	{
87	struct timespec ts;	211	struct timespec ts;
88	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	}	214	}
91	#endif	215	#endif
92		216
93	return ev_time ();	217	return ev_time ();
94	}	218	}
95		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
96	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
97	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
98	{ \	230	{ \
99	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
100	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	\
101	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
102	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
103	cur = newcnt; \	240	cur = newcnt; \
104	}	241	}
105		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
106	/*****************************************************************************/	254	/*****************************************************************************/
107		255
108	typedef struct
109	{
110	struct ev_io *head;
111	unsigned char wev, rev; /* want, received event set */
112	} ANFD;
113
114	static ANFD *anfds;
115	static int anfdmax;
116
117	static int *fdchanges;
118	static int fdchangemax, fdchangecnt;
119
120	static void	256	static void
121	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
122	{	258	{
123	while (count--)	259	while (count--)
124	{	260	{
125	base->head = 0;	261	base->head = 0;
126	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
127	++base;	265	++base;
128	}	266	}
129	}	267	}
130		268
131	typedef struct
132	{
133	W w;
134	int events;
135	} ANPENDING;
136
137	static ANPENDING *pendings;
138	static int pendingmax, pendingcnt;
139
140	static void	269	static void
141	event (W w, int events)	270	event (EV_P_ W w, int events)
142	{	271	{
		272	if (w->pending)
		273	{
		274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		275	return;
		276	}
		277
143	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
144	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
145	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
146	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
147	}	282	}
148		283
149	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
150	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
151	{	295	{
152	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
153	struct ev_io *w;	297	struct ev_io *w;
154		298
155	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
156	{	300	{
157	int ev = w->events & events;	301	int ev = w->events & events;
158		302
159	if (ev)	303	if (ev)
160	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
161	}	305	}
162	}	306	}
163		307
		308	/*****************************************************************************/
		309
164	static void	310	static void
165	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
166	{	312	{
167	int i;	313	int i;
168		314
169	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
170	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	}
171	}	400	}
172		401
173	/*****************************************************************************/	402	/*****************************************************************************/
174		403
175	static struct ev_timer **timers;
176	static int timermax, timercnt;
177
178	static struct ev_periodic **periodics;
179	static int periodicmax, periodiccnt;
180
181	static void	404	static void
182	upheap (WT *timers, int k)	405	upheap (WT *heap, int k)
183	{	406	{
184	WT w = timers [k];	407	WT w = heap [k];
185		408
186	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
187	{	410	{
188	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
189	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
190	k >>= 1;	413	k >>= 1;
191	}	414	}
192		415
193	timers [k] = w;	416	heap [k] = w;
194	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
195		418
196	}	419	}
197		420
198	static void	421	static void
199	downheap (WT *timers, int N, int k)	422	downheap (WT *heap, int N, int k)
200	{	423	{
201	WT w = timers [k];	424	WT w = heap [k];
202		425
203	while (k < (N >> 1))	426	while (k < (N >> 1))
204	{	427	{
205	int j = k << 1;	428	int j = k << 1;
206		429
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208	++j;	431	++j;
209		432
210	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
211	break;	434	break;
212		435
213	timers [k] = timers [j];	436	heap [k] = heap [j];
214	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
215	k = j;	438	k = j;
216	}	439	}
217		440
218	timers [k] = w;	441	heap [k] = w;
219	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
220	}	443	}
221		444
222	/*****************************************************************************/	445	/*****************************************************************************/
223		446
224	typedef struct	447	typedef struct
225	{	448	{
226	struct ev_signal *head;	449	struct ev_watcher_list *head;
227	sig_atomic_t gotsig;	450	sig_atomic_t volatile gotsig;
228	} ANSIG;	451	} ANSIG;
229		452
230	static ANSIG *signals;	453	static ANSIG *signals;
231	static int signalmax;	454	static int signalmax;
232		455
233	static int sigpipe [2];	456	static int sigpipe [2];
234	static sig_atomic_t gotsig;	457	static sig_atomic_t volatile gotsig;
235	static struct ev_io sigev;	458	static struct ev_io sigev;
236		459
237	static void	460	static void
238	signals_init (ANSIG *base, int count)	461	signals_init (ANSIG *base, int count)
239	{	462	{
240	while (count--)	463	while (count--)
241	{	464	{
242	base->head = 0;	465	base->head = 0;
243	base->gotsig = 0;	466	base->gotsig = 0;
		467
244	++base;	468	++base;
245	}	469	}
246	}	470	}
247		471
248	static void	472	static void
249	sighandler (int signum)	473	sighandler (int signum)
250	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
251	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
252		480
253	if (!gotsig)	481	if (!gotsig)
254	{	482	{
		483	int old_errno = errno;
255	gotsig = 1;	484	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
257	}	487	}
258	}	488	}
259		489
260	static void	490	static void
261	sigcb (struct ev_io *iow, int revents)	491	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	492	{
263	struct ev_signal *w;	493	struct ev_watcher_list *w;
264	int sig;	494	int signum;
265		495
		496	read (sigpipe [0], &revents, 1);
266	gotsig = 0;	497	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		498
269	for (sig = signalmax; sig--; )	499	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	500	if (signals [signum].gotsig)
271	{	501	{
272	signals [sig].gotsig = 0;	502	signals [signum].gotsig = 0;
273		503
274	for (w = signals [sig].head; w; w = w->next)	504	for (w = signals [signum].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);	505	event (EV_A_ (W)w, EV_SIGNAL);
276	}	506	}
277	}	507	}
278		508
279	static void	509	static void
280	siginit (void)	510	siginit (EV_P)
281	{	511	{
		512	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		515
285	/* rather than sort out wether we really need nb, set it */	516	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
288		520
289	evio_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	524	}
292		525
293	/*****************************************************************************/	526	/*****************************************************************************/
294		527
295	static struct ev_idle **idles;	528	#ifndef WIN32
296	static int idlemax, idlecnt;
297		529
298	static struct ev_check **checks;	530	static struct ev_child *childs [PID_HASHSIZE];
299	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
300		568
301	/*****************************************************************************/	569	/*****************************************************************************/
302		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
303	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	575	# include "ev_epoll.c"
305	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
306	#if HAVE_SELECT	580	#if EV_USE_SELECT
307	# include "ev_select.c"	581	# include "ev_select.c"
308	#endif	582	#endif
309		583
310	int ev_init (int flags)	584	int
		585	ev_version_major (void)
311	{	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	{
312	#if HAVE_MONOTONIC	619	#if EV_USE_MONOTONIC
313	{	620	{
314	struct timespec ts;	621	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	623	have_monotonic = 1;
317	}	624	}
318	#endif	625	#endif
319		626
320	ev_now = ev_time ();	627	rt_now = ev_time ();
321	now = get_clock ();	628	mn_now = get_clock ();
322	diff = ev_now - now;	629	now_floor = mn_now;
		630	rtmn_diff = rt_now - mn_now;
323		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])
324	if (pipe (sigpipe))	746	if (pipe (sigpipe))
325	return 0;	747	return 0;
326		748
327	ev_method = EVMETHOD_NONE;	749	if (!default_loop)
328	#if HAVE_EPOLL
329	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
330	#endif
331	#if HAVE_SELECT
332	if (ev_method == EVMETHOD_NONE) select_init (flags);
333	#endif
334
335	if (ev_method)
336	{	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	{
337	evw_init (&sigev, sigcb);	761	ev_watcher_init (&sigev, sigcb);
		762	ev_set_priority (&sigev, EV_MAXPRI);
338	siginit ();	763	siginit (EV_A);
339	}
340		764
341	return ev_method;	765	#ifndef WIN32
342	}	766	ev_signal_init (&childev, childcb, SIGCHLD);
343		767	ev_set_priority (&childev, EV_MAXPRI);
344	/*****************************************************************************/	768	ev_signal_start (EV_A_ &childev);
345		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
346	void ev_prefork (void)
347	{
348	/* nop */
349	}
350
351	void ev_postfork_parent (void)
352	{
353	/* nop */
354	}
355
356	void ev_postfork_child (void)
357	{
358	#if HAVE_EPOLL
359	if (ev_method == EVMETHOD_EPOLL)
360	epoll_postfork_child ();
361	#endif	770	#endif
		771	}
		772	else
		773	default_loop = 0;
		774	}
362		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 */
363	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);
364	close (sigpipe [0]);	808	close (sigpipe [0]);
365	close (sigpipe [1]);	809	close (sigpipe [1]);
366	pipe (sigpipe);	810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
367	siginit ();	813	siginit (EV_A);
368	}	814	}
369		815
370	/*****************************************************************************/	816	/*****************************************************************************/
371		817
372	static void	818	static void
373	fd_reify (void)	819	call_pending (EV_P)
374	{	820	{
375	int i;	821	int pri;
376		822
377	for (i = 0; i < fdchangecnt; ++i)	823	for (pri = NUMPRI; pri--; )
378	{	824	while (pendingcnt [pri])
379	int fd = fdchanges [i];
380	ANFD *anfd = anfds + fd;
381	struct ev_io *w;
382
383	int wev = 0;
384
385	for (w = anfd->head; w; w = w->next)
386	wev |= w->events;
387
388	if (anfd->wev != wev)
389	{	825	{
390	method_modify (fd, anfd->wev, wev);	826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391	anfd->wev = wev;
392	}
393	}
394		827
395	fdchangecnt = 0;
396	}
397
398	static void
399	call_pending ()
400	{
401	int i;
402
403	for (i = 0; i < pendingcnt; ++i)
404	{
405	ANPENDING *p = pendings + i;
406
407	if (p->w)	828	if (p->w)
408	{	829	{
409	p->w->pending = 0;	830	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	831	p->w->cb (EV_A_ p->w, p->events);
411	}	832	}
412	}	833	}
413
414	pendingcnt = 0;
415	}	834	}
416		835
417	static void	836	static void
418	timers_reify ()	837	timers_reify (EV_P)
419	{	838	{
420	while (timercnt && timers [0]->at <= now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
421	{	840	{
422	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
		842
		843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
423		844
424	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
425	if (w->repeat)	846	if (w->repeat)
426	{	847	{
		848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	850	downheap ((WT *)timers, timercnt, 0);
430	}	851	}
431	else	852	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		854
434	event ((W)w, EV_TIMEOUT);	855	event (EV_A_ (W)w, EV_TIMEOUT);
435	}	856	}
436	}	857	}
437		858
438	static void	859	static void
439	periodics_reify ()	860	periodics_reify (EV_P)
440	{	861	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
442	{	863	{
443	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)));
444		867
445	/* first reschedule or stop timer */	868	/* first reschedule or stop timer */
446	if (w->interval)	869	if (w->interval)
447	{	870	{
448	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;
449	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));
450	downheap ((WT *)periodics, periodiccnt, 0);	873	downheap ((WT *)periodics, periodiccnt, 0);
451	}	874	}
452	else	875	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		877
455	event ((W)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
456	}	879	}
457	}	880	}
458		881
459	static void	882	static void
460	time_jump (ev_tstamp diff)	883	periodics_reschedule (EV_P)
461	{	884	{
462	int i;	885	int i;
463		886
464	/* adjust periodics */	887	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	888	for (i = 0; i < periodiccnt; ++i)
466	{	889	{
467	struct ev_periodic *w = periodics [i];	890	struct ev_periodic *w = periodics [i];
468		891
469	if (w->interval)	892	if (w->interval)
470	{	893	{
471	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;
472		895
473	if (fabs (diff) >= 1e-4)	896	if (fabs (diff) >= 1e-4)
474	{	897	{
475	evperiodic_stop (w);	898	ev_periodic_stop (EV_A_ w);
476	evperiodic_start (w);	899	ev_periodic_start (EV_A_ w);
477		900
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */	901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	902	}
480	}	903	}
481	}	904	}
482
483	/* adjust timers. this is easy, as the offset is the same for all */
484	for (i = 0; i < timercnt; ++i)
485	timers [i]->at += diff;
486	}	905	}
487		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
488	static void	925	static void
489	time_update ()	926	time_update (EV_P)
490	{	927	{
491	int i;	928	int i;
492		929
493	ev_now = ev_time ();	930	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	931	if (expect_true (have_monotonic))
496	{	932	{
497	ev_tstamp odiff = diff;	933	if (time_update_monotonic (EV_A))
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	934	{
501	now = get_clock ();	935	ev_tstamp odiff = rtmn_diff;
		936
		937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		938	{
502	diff = ev_now - now;	939	rtmn_diff = rt_now - mn_now;
503		940
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	942	return; /* all is well */
506		943
507	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) */
508	}	952	}
509
510	time_jump (diff - odiff);
511	}	953	}
512	else	954	else
		955	#endif
513	{	956	{
514	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	957	rt_now = ev_time ();
515	time_jump (ev_now - now);
516		958
		959	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		960	{
		961	periodics_reschedule (EV_A);
		962
		963	/* adjust timers. this is easy, as the offset is the same for all */
		964	for (i = 0; i < timercnt; ++i)
		965	((WT)timers [i])->at += rt_now - mn_now;
		966	}
		967
517	now = ev_now;	968	mn_now = rt_now;
518	}	969	}
519	}	970	}
520		971
521	int ev_loop_done;	972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
522		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
523	void ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
524	{	988	{
525	double block;	989	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	990	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
527
528	if (checkcnt)
529	{
530	queue_events ((W *)checks, checkcnt, EV_CHECK);
531	call_pending ();
532	}
533		991
534	do	992	do
535	{	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
536	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
537	fd_reify ();	1002	fd_reify (EV_A);
538		1003
539	/* calculate blocking time */	1004	/* calculate blocking time */
540		1005
541	/* 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	{
542	ev_now = ev_time ();	1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
543		1017
544	if (flags & EVLOOP_NONBLOCK || idlecnt)	1018	if (flags & EVLOOP_NONBLOCK || idlecnt)
545	block = 0.;	1019	block = 0.;
546	else	1020	else
547	{	1021	{
548	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
549		1023
550	if (timercnt)	1024	if (timercnt)
551	{	1025	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
553	if (block > to) block = to;	1027	if (block > to) block = to;
554	}	1028	}
555		1029
556	if (periodiccnt)	1030	if (periodiccnt)
557	{	1031	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
559	if (block > to) block = to;	1033	if (block > to) block = to;
560	}	1034	}
561		1035
562	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
563	}	1037	}
564		1038
565	method_poll (block);	1039	method_poll (EV_A_ block);
566		1040
567	/* update ev_now, do magic */	1041	/* update rt_now, do magic */
568	time_update ();	1042	time_update (EV_A);
569		1043
570	/* queue pending timers and reschedule them */	1044	/* queue pending timers and reschedule them */
		1045	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	1046	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		1047
574	/* queue idle watchers unless io or timers are pending */	1048	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	1049	if (!pendingcnt)
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		1051
578	/* queue check and possibly idle watchers */	1052	/* queue check watchers, to be executed first */
		1053	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		1055
581	call_pending ();	1056	call_pending (EV_A);
582	}	1057	}
583	while (!ev_loop_done);	1058	while (activecnt && !loop_done);
		1059
		1060	if (loop_done != 2)
		1061	loop_done = 0;
		1062	}
		1063
		1064	void
		1065	ev_unloop (EV_P_ int how)
		1066	{
		1067	loop_done = how;
584	}	1068	}
585		1069
586	/*****************************************************************************/	1070	/*****************************************************************************/
587		1071
588	static void	1072	inline void
589	wlist_add (WL *head, WL elem)	1073	wlist_add (WL *head, WL elem)
590	{	1074	{
591	elem->next = *head;	1075	elem->next = *head;
592	*head = elem;	1076	*head = elem;
593	}	1077	}
594		1078
595	static void	1079	inline void
596	wlist_del (WL *head, WL elem)	1080	wlist_del (WL *head, WL elem)
597	{	1081	{
598	while (*head)	1082	while (*head)
599	{	1083	{
600	if (*head == elem)	1084	if (*head == elem)
…		…
605		1089
606	head = &(*head)->next;	1090	head = &(*head)->next;
607	}	1091	}
608	}	1092	}
609		1093
610	static void	1094	inline void
		1095	ev_clear_pending (EV_P_ W w)
		1096	{
		1097	if (w->pending)
		1098	{
		1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		1100	w->pending = 0;
		1101	}
		1102	}
		1103
		1104	inline void
611	ev_start (W w, int active)	1105	ev_start (EV_P_ W w, int active)
612	{	1106	{
613	w->pending = 0;	1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1109
614	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
615	}	1112	}
616		1113
617	static void	1114	inline void
618	ev_stop (W w)	1115	ev_stop (EV_P_ W w)
619	{	1116	{
620	if (w->pending)	1117	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	1118	w->active = 0;
624	}	1119	}
625		1120
626	/*****************************************************************************/	1121	/*****************************************************************************/
627		1122
628	void	1123	void
629	evio_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
630	{	1125	{
		1126	int fd = w->fd;
		1127
631	if (ev_is_active (w))	1128	if (ev_is_active (w))
632	return;	1129	return;
633		1130
634	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
635		1132
636	ev_start ((W)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		1136
640	++fdchangecnt;	1137	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	1138	}
644		1139
645	void	1140	void
646	evio_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
647	{	1142	{
		1143	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
649	return;	1145	return;
650		1146
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	1148	ev_stop (EV_A_ (W)w);
653		1149
654	++fdchangecnt;	1150	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1151	}
658		1152
659
660	void	1153	void
661	evtimer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1155	{
663	if (ev_is_active (w))	1156	if (ev_is_active (w))
664	return;	1157	return;
665		1158
666	w->at += now;	1159	((WT)w)->at += mn_now;
667		1160
		1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1162
668	ev_start ((W)w, ++timercnt);	1163	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1164	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;	1165	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1166	upheap ((WT *)timers, timercnt - 1);
672	}
673		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
674	void	1171	void
675	evtimer_stop (struct ev_timer *w)	1172	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1175	if (!ev_is_active (w))
678	return;	1176	return;
679		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
680	if (w->active < timercnt--)	1180	if (((W)w)->active < timercnt--)
681	{	1181	{
682	timers [w->active - 1] = timers [timercnt];	1182	timers [((W)w)->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
684	}	1184	}
685		1185
		1186	((WT)w)->at = w->repeat;
		1187
686	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
687	}	1189	}
688		1190
689	void	1191	void
690	evperiodic_start (struct ev_periodic *w)	1192	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1193	{
692	if (ev_is_active (w))	1194	if (ev_is_active (w))
		1195	{
		1196	if (w->repeat)
		1197	{
		1198	((WT)w)->at = mn_now + w->repeat;
		1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
		1200	}
		1201	else
		1202	ev_timer_stop (EV_A_ w);
		1203	}
		1204	else if (w->repeat)
		1205	ev_timer_start (EV_A_ w);
		1206	}
		1207
		1208	void
		1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1210	{
		1211	if (ev_is_active (w))
693	return;	1212	return;
		1213
		1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694		1215
695	/* 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 */
696	if (w->interval)	1217	if (w->interval)
697	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;
698		1219
699	ev_start ((W)w, ++periodiccnt);	1220	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1221	array_needsize (periodics, periodicmax, periodiccnt, );
701	periodics [periodiccnt - 1] = w;	1222	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1223	upheap ((WT *)periodics, periodiccnt - 1);
703	}
704		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1226	}
		1227
705	void	1228	void
706	evperiodic_stop (struct ev_periodic *w)	1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1230	{
		1231	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
709	return;	1233	return;
710		1234
		1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1236
711	if (w->active < periodiccnt--)	1237	if (((W)w)->active < periodiccnt--)
712	{	1238	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
715	}	1241	}
716		1242
717	ev_stop ((W)w);	1243	ev_stop (EV_A_ (W)w);
718	}	1244	}
719		1245
720	void	1246	void
721	evsignal_start (struct ev_signal *w)	1247	ev_idle_start (EV_P_ struct ev_idle *w)
722	{	1248	{
723	if (ev_is_active (w))	1249	if (ev_is_active (w))
724	return;	1250	return;
725		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
726	ev_start ((W)w, 1);	1327	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1330
730	if (!w->next)	1331	if (!((WL)w)->next)
731	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
732	struct sigaction sa;	1336	struct sigaction sa;
733	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
737	}	1342	}
738	}	1343	}
739		1344
740	void	1345	void
741	evsignal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1347	{
		1348	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
744	return;	1350	return;
745		1351
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1353	ev_stop (EV_A_ (W)w);
748		1354
749	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
751	}	1357	}
752		1358
753	void evidle_start (struct ev_idle *w)	1359	void
		1360	ev_child_start (EV_P_ struct ev_child *w)
754	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
755	if (ev_is_active (w))	1365	if (ev_is_active (w))
756	return;	1366	return;
757		1367
758	ev_start ((W)w, ++idlecnt);	1368	ev_start (EV_A_ (W)w, 1);
759	array_needsize (idles, idlemax, idlecnt, );	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
760	idles [idlecnt - 1] = w;
761	}	1370	}
762		1371
763	void evidle_stop (struct ev_idle *w)	1372	void
		1373	ev_child_stop (EV_P_ struct ev_child *w)
764	{	1374	{
765	idles [w->active - 1] = idles [--idlecnt];	1375	ev_clear_pending (EV_A_ (W)w);
766	ev_stop ((W)w);
767	}
768
769	void evcheck_start (struct ev_check *w)
770	{
771	if (ev_is_active (w))	1376	if (ev_is_active (w))
772	return;	1377	return;
773		1378
774	ev_start ((W)w, ++checkcnt);	1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
775	array_needsize (checks, checkmax, checkcnt, );
776	checks [checkcnt - 1] = w;
777	}
778
779	void evcheck_stop (struct ev_check *w)
780	{
781	checks [w->active - 1] = checks [--checkcnt];
782	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
783	}	1381	}
784		1382
785	/*****************************************************************************/	1383	/*****************************************************************************/
786		1384
787	#if 1	1385	struct ev_once
788		1386	{
789	struct ev_io wio;	1387	struct ev_io io;
790
791	static void
792	sin_cb (struct ev_io *w, int revents)
793	{
794	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
795	}
796
797	static void
798	ocb (struct ev_timer *w, int revents)
799	{
800	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
801	evtimer_stop (w);
802	evtimer_start (w);
803	}
804
805	static void
806	scb (struct ev_signal *w, int revents)
807	{
808	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
809	evio_stop (&wio);
810	evio_start (&wio);
811	}
812
813	static void
814	gcb (struct ev_signal *w, int revents)
815	{
816	fprintf (stderr, "generic %x\n", revents);
817
818	}
819
820	int main (void)
821	{
822	ev_init (0);
823
824	evio_init (&wio, sin_cb, 0, EV_READ);
825	evio_start (&wio);
826
827	struct ev_timer t[10000];
828
829	#if 0
830	int i;
831	for (i = 0; i < 10000; ++i)
832	{
833	struct ev_timer *w = t + i;
834	evw_init (w, ocb, i);
835	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
836	evtimer_start (w);
837	if (drand48 () < 0.5)
838	evtimer_stop (w);
839	}
840	#endif
841
842	struct ev_timer t1;	1388	struct ev_timer to;
843	evtimer_init (&t1, ocb, 5, 10);	1389	void (*cb)(int revents, void *arg);
844	evtimer_start (&t1);	1390	void *arg;
		1391	};
845		1392
846	struct ev_signal sig;	1393	static void
847	evsignal_init (&sig, scb, SIGQUIT);	1394	once_cb (EV_P_ struct ev_once *once, int revents)
848	evsignal_start (&sig);	1395	{
		1396	void (*cb)(int revents, void *arg) = once->cb;
		1397	void *arg = once->arg;
849		1398
850	struct ev_check cw;	1399	ev_io_stop (EV_A_ &once->io);
851	evcheck_init (&cw, gcb);	1400	ev_timer_stop (EV_A_ &once->to);
852	evcheck_start (&cw);	1401	free (once);
853		1402
854	struct ev_idle iw;	1403	cb (revents, arg);
855	evidle_init (&iw, gcb);
856	evidle_start (&iw);
857
858	ev_loop (0);
859
860	return 0;
861	}	1404	}
862		1405
863	#endif	1406	static void
		1407	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1408	{
		1409	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1410	}
864		1411
		1412	static void
		1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1414	{
		1415	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1416	}
865		1417
		1418	void
		1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1420	{
		1421	struct ev_once *once = malloc (sizeof (struct ev_once));
866		1422
		1423	if (!once)
		1424	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1425	else
		1426	{
		1427	once->cb = cb;
		1428	once->arg = arg;
867		1429
		1430	ev_watcher_init (&once->io, once_cb_io);
		1431	if (fd >= 0)
		1432	{
		1433	ev_io_set (&once->io, fd, events);
		1434	ev_io_start (EV_A_ &once->io);
		1435	}
		1436
		1437	ev_watcher_init (&once->to, once_cb_to);
		1438	if (timeout >= 0.)
		1439	{
		1440	ev_timer_set (&once->to, timeout, 0.);
		1441	ev_timer_start (EV_A_ &once->to);
		1442	}
		1443	}
		1444	}
		1445

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