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Comparing libev/ev.c (file contents):
Revision 1.10 by root, Wed Oct 31 07:36:03 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
		75	/**/
		76
14	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
15	# ifdef CLOCK_MONOTONIC
16	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
17	# endif	102	# endif
18	#endif	103	#endif
19		104
20	#ifndef HAVE_SELECT
21	# define HAVE_SELECT 1
22	#endif
23
24	#ifndef HAVE_EPOLL
25	# define HAVE_EPOLL 0
26	#endif
27
28	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
30	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
31		122
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
34		127
35	#include "ev.h"	128	#include "ev.h"
36		129
37	struct ev_watcher {	130	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	131	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
40		137
41	struct ev_watcher_list {	138	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	139	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		143
45	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
		146	typedef struct ev_watcher_time *WT;
47		147
48	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
49	ev_tstamp ev_now;
50	int ev_method;
51		149
52	static int have_monotonic; /* runtime */	150	#if WIN32
53		151	/* note: the comment below could not be substantiated, but what would I care */
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
55	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
56	static void (*method_poll)(ev_tstamp timeout);	154	#endif
57		155
58	/*****************************************************************************/	156	/*****************************************************************************/
59		157
60	ev_tstamp	158	typedef struct
		159	{
		160	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
61	ev_time (void)	192	ev_time (void)
62	{	193	{
63	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
64	struct timespec ts;	195	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	198	#else
68	struct timeval tv;	199	struct timeval tv;
69	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	202	#endif
72	}	203	}
73		204
74	static ev_tstamp	205	inline ev_tstamp
75	get_clock (void)	206	get_clock (void)
76	{	207	{
77	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
78	if (have_monotonic)	209	if (expect_true (have_monotonic))
79	{	210	{
80	struct timespec ts;	211	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	214	}
84	#endif	215	#endif
85		216
86	return ev_time ();	217	return ev_time ();
87	}	218	}
88		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) | 4 & ~3)
		227
89	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
91	{ \	230	{ \
92	int newcnt = cur ? cur << 1 : 16; \	231	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	232	do \
		233	{ \
		234	newcnt = array_roundsize (base, newcnt << 1); \
		235	} \
		236	while ((cnt) > newcnt); \
		237	\
94	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
95	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	240	cur = newcnt; \
97	}	241	}
98		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (*base) * (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
99	/*****************************************************************************/	254	/*****************************************************************************/
100		255
101	typedef struct
102	{
103	struct ev_io *head;
104	unsigned char wev, rev; /* want, received event set */
105	} ANFD;
106
107	static ANFD *anfds;
108	static int anfdmax;
109
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	256	static void
114	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
115	{	258	{
116	while (count--)	259	while (count--)
117	{	260	{
118	base->head = 0;	261	base->head = 0;
119	base->wev = base->rev = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
120	++base;	265	++base;
121	}	266	}
122	}	267	}
123		268
124	typedef struct
125	{
126	W w;
127	int events;
128	} ANPENDING;
129
130	static ANPENDING *pendings;
131	static int pendingmax, pendingcnt;
132
133	static void	269	static void
134	event (W w, int events)	270	event (EV_P_ W w, int events)
135	{	271	{
		272	if (w->pending)
		273	{
		274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		275	return;
		276	}
		277
136	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
138	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
140	}	282	}
141		283
142	static void	284	static void
		285	queue_events (EV_P_ W *events, int eventcnt, int type)
		286	{
		287	int i;
		288
		289	for (i = 0; i < eventcnt; ++i)
		290	event (EV_A_ events [i], type);
		291	}
		292
		293	static void
143	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
144	{	295	{
145	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	297	struct ev_io *w;
147		298
148	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
149	{	300	{
150	int ev = w->events & events;	301	int ev = w->events & events;
151		302
152	if (ev)	303	if (ev)
153	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
154	}	305	}
155	}	306	}
156		307
		308	/*****************************************************************************/
		309
157	static void	310	static void
158	queue_events (W *events, int eventcnt, int type)	311	fd_reify (EV_P)
159	{	312	{
160	int i;	313	int i;
161		314
162	for (i = 0; i < eventcnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	316	{
		317	int fd = fdchanges [i];
		318	ANFD *anfd = anfds + fd;
		319	struct ev_io *w;
		320
		321	int events = 0;
		322
		323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		324	events |= w->events;
		325
		326	anfd->reify = 0;
		327
		328	method_modify (EV_A_ fd, anfd->events, events);
		329	anfd->events = events;
		330	}
		331
		332	fdchangecnt = 0;
		333	}
		334
		335	static void
		336	fd_change (EV_P_ int fd)
		337	{
		338	if (anfds [fd].reify || fdchangecnt < 0)
		339	return;
		340
		341	anfds [fd].reify = 1;
		342
		343	++fdchangecnt;
		344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		345	fdchanges [fdchangecnt - 1] = fd;
		346	}
		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		357	}
		358	}
		359
		360	/* called on EBADF to verify fds */
		361	static void
		362	fd_ebadf (EV_P)
		363	{
		364	int fd;
		365
		366	for (fd = 0; fd < anfdmax; ++fd)
		367	if (anfds [fd].events)
		368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		369	fd_kill (EV_A_ fd);
		370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
		380	{
		381	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	}
164	}	400	}
165		401
166	/*****************************************************************************/	402	/*****************************************************************************/
167		403
168	static struct ev_timer **atimers;
169	static int atimermax, atimercnt;
170
171	static struct ev_timer **rtimers;
172	static int rtimermax, rtimercnt;
173
174	static void	404	static void
175	upheap (struct ev_timer **timers, int k)	405	upheap (WT *heap, int k)
176	{	406	{
177	struct ev_timer *w = timers [k];	407	WT w = heap [k];
178		408
179	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
180	{	410	{
181	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
182	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
183	k >>= 1;	413	k >>= 1;
184	}	414	}
185		415
186	timers [k] = w;	416	heap [k] = w;
187	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
188		418
189	}	419	}
190		420
191	static void	421	static void
192	downheap (struct ev_timer **timers, int N, int k)	422	downheap (WT *heap, int N, int k)
193	{	423	{
194	struct ev_timer *w = timers [k];	424	WT w = heap [k];
195		425
196	while (k < (N >> 1))	426	while (k < (N >> 1))
197	{	427	{
198	int j = k << 1;	428	int j = k << 1;
199		429
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
201	++j;	431	++j;
202		432
203	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
204	break;	434	break;
205		435
206	timers [k] = timers [j];	436	heap [k] = heap [j];
207	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
208	k = j;	438	k = j;
209	}	439	}
210		440
211	timers [k] = w;	441	heap [k] = w;
212	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
213	}	443	}
214		444
215	/*****************************************************************************/	445	/*****************************************************************************/
216		446
217	typedef struct	447	typedef struct
218	{	448	{
219	struct ev_signal *head;	449	struct ev_watcher_list *head;
220	sig_atomic_t gotsig;	450	sig_atomic_t volatile gotsig;
221	} ANSIG;	451	} ANSIG;
222		452
223	static ANSIG *signals;	453	static ANSIG *signals;
224	static int signalmax;	454	static int signalmax;
225		455
226	static int sigpipe [2];	456	static int sigpipe [2];
227	static sig_atomic_t gotsig;	457	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	458	static struct ev_io sigev;
229		459
230	static void	460	static void
231	signals_init (ANSIG *base, int count)	461	signals_init (ANSIG *base, int count)
232	{	462	{
233	while (count--)	463	while (count--)
234	{	464	{
235	base->head = 0;	465	base->head = 0;
236	base->gotsig = 0;	466	base->gotsig = 0;
		467
237	++base;	468	++base;
238	}	469	}
239	}	470	}
240		471
241	static void	472	static void
242	sighandler (int signum)	473	sighandler (int signum)
243	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
244	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
245		480
246	if (!gotsig)	481	if (!gotsig)
247	{	482	{
		483	int old_errno = errno;
248	gotsig = 1;	484	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
250	}	487	}
251	}	488	}
252		489
253	static void	490	static void
254	sigcb (struct ev_io *iow, int revents)	491	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	492	{
256	struct ev_signal *w;	493	struct ev_watcher_list *w;
257	int sig;	494	int signum;
258		495
		496	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	497	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		498
262	for (sig = signalmax; sig--; )	499	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	500	if (signals [signum].gotsig)
264	{	501	{
265	signals [sig].gotsig = 0;	502	signals [signum].gotsig = 0;
266		503
267	for (w = signals [sig].head; w; w = w->next)	504	for (w = signals [signum].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);	505	event (EV_A_ (W)w, EV_SIGNAL);
269	}	506	}
270	}	507	}
271		508
272	static void	509	static void
273	siginit (void)	510	siginit (EV_P)
274	{	511	{
		512	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		515
278	/* rather than sort out wether we really need nb, set it */	516	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
281		520
282	evio_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
284	}	524	}
285		525
286	/*****************************************************************************/	526	/*****************************************************************************/
287		527
288	static struct ev_idle **idles;	528	#ifndef WIN32
289	static int idlemax, idlecnt;
290		529
291	static struct ev_check **checks;	530	static struct ev_child *childs [PID_HASHSIZE];
292	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
293		568
294	/*****************************************************************************/	569	/*****************************************************************************/
295		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
296	#if HAVE_EPOLL	574	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	575	# include "ev_epoll.c"
298	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
299	#if HAVE_SELECT	580	#if EV_USE_SELECT
300	# include "ev_select.c"	581	# include "ev_select.c"
301	#endif	582	#endif
302		583
303	int ev_init (int flags)	584	int
		585	ev_version_major (void)
304	{	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	{
305	#if HAVE_MONOTONIC	619	#if EV_USE_MONOTONIC
306	{	620	{
307	struct timespec ts;	621	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	623	have_monotonic = 1;
310	}	624	}
311	#endif	625	#endif
312		626
313	ev_now = ev_time ();	627	rt_now = ev_time ();
314	now = get_clock ();	628	mn_now = get_clock ();
315	diff = ev_now - now;	629	now_floor = mn_now;
		630	rtmn_diff = rt_now - mn_now;
316		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])
317	if (pipe (sigpipe))	746	if (pipe (sigpipe))
318	return 0;	747	return 0;
319		748
320	ev_method = EVMETHOD_NONE;	749	if (!default_loop)
321	#if HAVE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
323	#endif
324	#if HAVE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);
326	#endif
327
328	if (ev_method)
329	{	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	{
330	evw_init (&sigev, sigcb, 0);	761	ev_watcher_init (&sigev, sigcb);
		762	ev_set_priority (&sigev, EV_MAXPRI);
331	siginit ();	763	siginit (EV_A);
332	}
333		764
334	return ev_method;	765	#ifndef WIN32
335	}	766	ev_signal_init (&childev, childcb, SIGCHLD);
336		767	ev_set_priority (&childev, EV_MAXPRI);
337	/*****************************************************************************/	768	ev_signal_start (EV_A_ &childev);
338		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
339	void ev_prefork (void)
340	{
341	}
342
343	void ev_postfork_parent (void)
344	{
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 (struct ev_timer **timers, int timercnt, ev_tstamp now)	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];
		842
		843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
414		844
415	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
416	if (w->repeat)	846	if (w->repeat)
417	{	847	{
418	if (w->is_abs)	848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
419	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
420	else
421	w->at = now + w->repeat;	849	((WT)w)->at = mn_now + w->repeat;
422
423	assert (w->at > now);
424
425	downheap (timers, timercnt, 0);	850	downheap ((WT *)timers, timercnt, 0);
426	}	851	}
427	else	852	else
		853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		854
		855	event (EV_A_ (W)w, EV_TIMEOUT);
		856	}
		857	}
		858
		859	static void
		860	periodics_reify (EV_P)
		861	{
		862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
		863	{
		864	struct ev_periodic *w = periodics [0];
		865
		866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
		867
		868	/* first reschedule or stop timer */
		869	if (w->interval)
428	{	870	{
429	evtimer_stop (w); /* nonrepeating: stop timer */	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
430	--timercnt; /* maybe pass by reference instead? */	872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
		873	downheap ((WT *)periodics, periodiccnt, 0);
431	}	874	}
		875	else
		876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
432		877
433	event ((W)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
434	}	879	}
435	}	880	}
436		881
437	static void	882	static void
438	time_update ()	883	periodics_reschedule (EV_P)
439	{	884	{
440	int i;	885	int i;
441	ev_now = ev_time ();
442		886
443	if (have_monotonic)	887	/* adjust periodics after time jump */
		888	for (i = 0; i < periodiccnt; ++i)
444	{	889	{
445	ev_tstamp odiff = diff;	890	struct ev_periodic *w = periodics [i];
446		891
447	/* detecting time jumps is much more difficult */	892	if (w->interval)
448	for (i = 2; --i; ) /* loop a few times, before making important decisions */
449	{	893	{
450	now = get_clock ();	894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
451	diff = ev_now - now;
452		895
453	if (fabs (odiff - diff) < MIN_TIMEJUMP)	896	if (fabs (diff) >= 1e-4)
454	return; /* all is well */	897	{
		898	ev_periodic_stop (EV_A_ w);
		899	ev_periodic_start (EV_A_ w);
455		900
456	ev_now = ev_time ();	901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		902	}
457	}	903	}
		904	}
		905	}
458		906
459	/* time jump detected, reschedule atimers */	907	inline int
460	for (i = 0; i < atimercnt; ++i)	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
		925	static void
		926	time_update (EV_P)
		927	{
		928	int i;
		929
		930	#if EV_USE_MONOTONIC
		931	if (expect_true (have_monotonic))
		932	{
		933	if (time_update_monotonic (EV_A))
461	{	934	{
462	struct ev_timer *w = atimers [i];	935	ev_tstamp odiff = rtmn_diff;
463	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	936
		937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		938	{
		939	rtmn_diff = rt_now - mn_now;
		940
		941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		942	return; /* all is well */
		943
		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) */
464	}	952	}
465	}	953	}
466	else	954	else
		955	#endif
467	{	956	{
468	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	957	rt_now = ev_time ();
469	/* time jump detected, adjust rtimers */	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 */
470	for (i = 0; i < rtimercnt; ++i)	964	for (i = 0; i < timercnt; ++i)
471	rtimers [i]->at += ev_now - now;	965	((WT)timers [i])->at += rt_now - mn_now;
		966	}
472		967
473	now = ev_now;	968	mn_now = rt_now;
474	}	969	}
475	}	970	}
476		971
477	int ev_loop_done;	972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
478		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
479	void ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
480	{	988	{
481	double block;	989	double block;
482	ev_loop_done = flags & EVLOOP_ONESHOT;	990	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
483
484	if (checkcnt)
485	{
486	queue_events ((W *)checks, checkcnt, EV_CHECK);
487	call_pending ();
488	}
489		991
490	do	992	do
491	{	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
492	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
493	fd_reify ();	1002	fd_reify (EV_A);
494		1003
495	/* calculate blocking time */	1004	/* calculate blocking time */
		1005
		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	{
		1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
		1017
496	if (flags & EVLOOP_NONBLOCK || idlecnt)	1018	if (flags & EVLOOP_NONBLOCK || idlecnt)
497	block = 0.;	1019	block = 0.;
498	else	1020	else
499	{	1021	{
500	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
501		1023
502	if (rtimercnt)	1024	if (timercnt)
503	{	1025	{
504	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
505	if (block > to) block = to;	1027	if (block > to) block = to;
506	}	1028	}
507		1029
508	if (atimercnt)	1030	if (periodiccnt)
509	{	1031	{
510	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
511	if (block > to) block = to;	1033	if (block > to) block = to;
512	}	1034	}
513		1035
514	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
515	}	1037	}
516		1038
517	method_poll (block);	1039	method_poll (EV_A_ block);
518		1040
519	/* update ev_now, do magic */	1041	/* update rt_now, do magic */
520	time_update ();	1042	time_update (EV_A);
521		1043
522	/* queue pending timers and reschedule them */	1044	/* queue pending timers and reschedule them */
523	/* absolute timers first */	1045	timers_reify (EV_A); /* relative timers called last */
524	timers_reify (atimers, atimercnt, ev_now);	1046	periodics_reify (EV_A); /* absolute timers called first */
525	/* relative timers second */
526	timers_reify (rtimers, rtimercnt, now);
527		1047
528	/* queue idle watchers unless io or timers are pending */	1048	/* queue idle watchers unless io or timers are pending */
529	if (!pendingcnt)	1049	if (!pendingcnt)
530	queue_events ((W *)idles, idlecnt, EV_IDLE);	1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
531		1051
532	/* queue check and possibly idle watchers */	1052	/* queue check watchers, to be executed first */
		1053	if (checkcnt)
533	queue_events ((W *)checks, checkcnt, EV_CHECK);	1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
534		1055
535	call_pending ();	1056	call_pending (EV_A);
536	}	1057	}
537	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;
538	}	1068	}
539		1069
540	/*****************************************************************************/	1070	/*****************************************************************************/
541		1071
542	static void	1072	inline void
543	wlist_add (WL *head, WL elem)	1073	wlist_add (WL *head, WL elem)
544	{	1074	{
545	elem->next = *head;	1075	elem->next = *head;
546	*head = elem;	1076	*head = elem;
547	}	1077	}
548		1078
549	static void	1079	inline void
550	wlist_del (WL *head, WL elem)	1080	wlist_del (WL *head, WL elem)
551	{	1081	{
552	while (*head)	1082	while (*head)
553	{	1083	{
554	if (*head == elem)	1084	if (*head == elem)
…		…
559		1089
560	head = &(*head)->next;	1090	head = &(*head)->next;
561	}	1091	}
562	}	1092	}
563		1093
564	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
565	ev_start (W w, int active)	1105	ev_start (EV_P_ W w, int active)
566	{	1106	{
567	w->pending = 0;	1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1109
568	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
569	}	1112	}
570		1113
571	static void	1114	inline void
572	ev_stop (W w)	1115	ev_stop (EV_P_ W w)
573	{	1116	{
574	if (w->pending)	1117	ev_unref (EV_A);
575	pendings [w->pending - 1].w = 0;
576
577	w->active = 0;	1118	w->active = 0;
578	/* nop */
579	}	1119	}
580		1120
581	/*****************************************************************************/	1121	/*****************************************************************************/
582		1122
583	void	1123	void
584	evio_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
585	{	1125	{
		1126	int fd = w->fd;
		1127
586	if (ev_is_active (w))	1128	if (ev_is_active (w))
587	return;	1129	return;
588		1130
589	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
590		1132
591	ev_start ((W)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
592	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
593	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
594		1136
595	++fdchangecnt;	1137	fd_change (EV_A_ fd);
596	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
597	fdchanges [fdchangecnt - 1] = fd;
598	}	1138	}
599		1139
600	void	1140	void
601	evio_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
602	{	1142	{
		1143	ev_clear_pending (EV_A_ (W)w);
603	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
604	return;	1145	return;
605		1146
606	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
607	ev_stop ((W)w);	1148	ev_stop (EV_A_ (W)w);
608		1149
609	++fdchangecnt;	1150	fd_change (EV_A_ w->fd);
610	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
611	fdchanges [fdchangecnt - 1] = w->fd;
612	}	1151	}
613		1152
614	void	1153	void
615	evtimer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
616	{	1155	{
617	if (ev_is_active (w))	1156	if (ev_is_active (w))
618	return;	1157	return;
619		1158
620	if (w->is_abs)	1159	((WT)w)->at += mn_now;
		1160
		1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1162
		1163	ev_start (EV_A_ (W)w, ++timercnt);
		1164	array_needsize (timers, timermax, timercnt, );
		1165	timers [timercnt - 1] = w;
		1166	upheap ((WT *)timers, timercnt - 1);
		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
		1171	void
		1172	ev_timer_stop (EV_P_ struct ev_timer *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (!ev_is_active (w))
		1176	return;
		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
		1180	if (((W)w)->active < timercnt--)
		1181	{
		1182	timers [((W)w)->active - 1] = timers [timercnt];
		1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
621	{	1184	}
622	/* this formula differs from the one in timer_reify becuse we do not round up */	1185
		1186	((WT)w)->at = w->repeat;
		1187
		1188	ev_stop (EV_A_ (W)w);
		1189	}
		1190
		1191	void
		1192	ev_timer_again (EV_P_ struct ev_timer *w)
		1193	{
		1194	if (ev_is_active (w))
		1195	{
623	if (w->repeat)	1196	if (w->repeat)
624	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1197	{
625		1198	((WT)w)->at = mn_now + w->repeat;
626	ev_start ((W)w, ++atimercnt);	1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
627	array_needsize (atimers, atimermax, atimercnt, );	1200	}
628	atimers [atimercnt - 1] = w;
629	upheap (atimers, atimercnt - 1);
630	}
631	else	1201	else
		1202	ev_timer_stop (EV_A_ w);
632	{	1203	}
633	w->at += now;	1204	else if (w->repeat)
634		1205	ev_timer_start (EV_A_ w);
635	ev_start ((W)w, ++rtimercnt);
636	array_needsize (rtimers, rtimermax, rtimercnt, );
637	rtimers [rtimercnt - 1] = w;
638	upheap (rtimers, rtimercnt - 1);
639	}
640
641	}	1206	}
642		1207
643	void	1208	void
644	evtimer_stop (struct ev_timer *w)	1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
645	{	1210	{
		1211	if (ev_is_active (w))
		1212	return;
		1213
		1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1215
		1216	/* this formula differs from the one in periodic_reify because we do not always round up */
		1217	if (w->interval)
		1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
		1219
		1220	ev_start (EV_A_ (W)w, ++periodiccnt);
		1221	array_needsize (periodics, periodicmax, periodiccnt, );
		1222	periodics [periodiccnt - 1] = w;
		1223	upheap ((WT *)periodics, periodiccnt - 1);
		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1226	}
		1227
		1228	void
		1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1230	{
		1231	ev_clear_pending (EV_A_ (W)w);
646	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
647	return;	1233	return;
648		1234
649	if (w->is_abs)	1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
650	{	1236
651	if (w->active < atimercnt--)	1237	if (((W)w)->active < periodiccnt--)
652	{
653	atimers [w->active - 1] = atimers [atimercnt];
654	downheap (atimers, atimercnt, w->active - 1);
655	}
656	}	1238	{
657	else	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
		1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
658	{	1241	}
659	if (w->active < rtimercnt--)
660	{
661	rtimers [w->active - 1] = rtimers [rtimercnt];
662	downheap (rtimers, rtimercnt, w->active - 1);
663	}
664	}
665		1242
666	ev_stop ((W)w);	1243	ev_stop (EV_A_ (W)w);
667	}	1244	}
668		1245
669	void	1246	void
670	evsignal_start (struct ev_signal *w)	1247	ev_idle_start (EV_P_ struct ev_idle *w)
671	{	1248	{
672	if (ev_is_active (w))	1249	if (ev_is_active (w))
673	return;	1250	return;
674		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
675	ev_start ((W)w, 1);	1327	ev_start (EV_A_ (W)w, 1);
676	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
677	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
678		1330
679	if (!w->next)	1331	if (!((WL)w)->next)
680	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
681	struct sigaction sa;	1336	struct sigaction sa;
682	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
683	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
684	sa.sa_flags = 0;	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
685	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
686	}	1342	}
687	}	1343	}
688		1344
689	void	1345	void
690	evsignal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
691	{	1347	{
		1348	ev_clear_pending (EV_A_ (W)w);
692	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
693	return;	1350	return;
694		1351
695	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
696	ev_stop ((W)w);	1353	ev_stop (EV_A_ (W)w);
697		1354
698	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
699	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
700	}	1357	}
701		1358
702	void evidle_start (struct ev_idle *w)	1359	void
		1360	ev_child_start (EV_P_ struct ev_child *w)
703	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
704	if (ev_is_active (w))	1365	if (ev_is_active (w))
705	return;	1366	return;
706		1367
707	ev_start ((W)w, ++idlecnt);	1368	ev_start (EV_A_ (W)w, 1);
708	array_needsize (idles, idlemax, idlecnt, );	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
709	idles [idlecnt - 1] = w;
710	}	1370	}
711		1371
712	void evidle_stop (struct ev_idle *w)	1372	void
		1373	ev_child_stop (EV_P_ struct ev_child *w)
713	{	1374	{
714	idles [w->active - 1] = idles [--idlecnt];	1375	ev_clear_pending (EV_A_ (W)w);
715	ev_stop ((W)w);
716	}
717
718	void evcheck_start (struct ev_check *w)
719	{
720	if (ev_is_active (w))	1376	if (ev_is_active (w))
721	return;	1377	return;
722		1378
723	ev_start ((W)w, ++checkcnt);	1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
724	array_needsize (checks, checkmax, checkcnt, );
725	checks [checkcnt - 1] = w;
726	}
727
728	void evcheck_stop (struct ev_check *w)
729	{
730	checks [w->active - 1] = checks [--checkcnt];
731	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
732	}	1381	}
733		1382
734	/*****************************************************************************/	1383	/*****************************************************************************/
735		1384
736	#if 0	1385	struct ev_once
737
738	static void
739	sin_cb (struct ev_io *w, int revents)
740	{	1386	{
741	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
742	}
743
744	static void
745	ocb (struct ev_timer *w, int revents)
746	{
747	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
748	evtimer_stop (w);
749	evtimer_start (w);
750	}
751
752	static void
753	scb (struct ev_signal *w, int revents)
754	{
755	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
756	}
757
758	static void
759	gcb (struct ev_signal *w, int revents)
760	{
761	fprintf (stderr, "generic %x\n", revents);
762	}
763
764	int main (void)
765	{
766	struct ev_io sin;	1387	struct ev_io io;
767
768	ev_init (0);
769
770	evw_init (&sin, sin_cb, 55);
771	evio_set (&sin, 0, EV_READ);
772	evio_start (&sin);
773
774	struct ev_timer t[10000];
775
776	#if 0
777	int i;
778	for (i = 0; i < 10000; ++i)
779	{
780	struct ev_timer *w = t + i;
781	evw_init (w, ocb, i);
782	evtimer_set_abs (w, drand48 (), 0.99775533);
783	evtimer_start (w);
784	if (drand48 () < 0.5)
785	evtimer_stop (w);
786	}
787	#endif
788
789	struct ev_timer t1;	1388	struct ev_timer to;
790	evw_init (&t1, ocb, 0);	1389	void (*cb)(int revents, void *arg);
791	evtimer_set_abs (&t1, 5, 10);	1390	void *arg;
792	evtimer_start (&t1);	1391	};
793		1392
794	struct ev_signal sig;	1393	static void
795	evw_init (&sig, scb, 65535);	1394	once_cb (EV_P_ struct ev_once *once, int revents)
796	evsignal_set (&sig, SIGQUIT);	1395	{
797	evsignal_start (&sig);	1396	void (*cb)(int revents, void *arg) = once->cb;
		1397	void *arg = once->arg;
798		1398
799	struct ev_check cw;	1399	ev_io_stop (EV_A_ &once->io);
800	evw_init (&cw, gcb, 0);	1400	ev_timer_stop (EV_A_ &once->to);
801	evcheck_start (&cw);	1401	free (once);
802		1402
803	struct ev_idle iw;	1403	cb (revents, arg);
804	evw_init (&iw, gcb, 0);
805	evidle_start (&iw);
806
807	ev_loop (0);
808
809	return 0;
810	}	1404	}
811		1405
812	#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	}
813		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	}
814		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));
815		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;
816		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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