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Comparing libev/ev.c (file contents):
Revision 1.11 by root, Wed Oct 31 07:40:49 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 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	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
3	#include <unistd.h>	37	#include <unistd.h>
4	#include <fcntl.h>	38	#include <fcntl.h>
5	#include <signal.h>	39	#include <signal.h>
		40	#include <stddef.h>
6		41
7	#include <stdio.h>	42	#include <stdio.h>
8		43
9	#include <assert.h>	44	#include <assert.h>
10	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
11	#include <sys/time.h>	50	#include <sys/time.h>
12	#include <time.h>	51	#include <time.h>
13		52
		53	/**/
		54
14	#ifndef HAVE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
		56	# define EV_USE_MONOTONIC 1
		57	#endif
		58
		59	#ifndef EV_USE_SELECT
		60	# define EV_USE_SELECT 1
		61	#endif
		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
		67	#ifndef EV_USE_EPOLL
		68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
15	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
16	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
17	# endif	84	#endif
18	#endif
19		85
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	86	#ifndef CLOCK_REALTIME
29	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
30	#endif	89	#endif
		90
		91	/**/
31		92
32	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
33	#define MAX_BLOCKTIME 60.	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
		95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
34		97
35	#include "ev.h"	98	#include "ev.h"
36		99
37	struct ev_watcher {	100	#if __GNUC__ >= 3
38	EV_WATCHER (ev_watcher);	101	# define expect(expr,value) __builtin_expect ((expr),(value))
39	};	102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
40		107
41	struct ev_watcher_list {	108	#define expect_false(expr) expect ((expr) != 0, 0)
42	EV_WATCHER_LIST (ev_watcher_list);	109	#define expect_true(expr) expect ((expr) != 0, 1)
43	};	110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
44		113
45	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
46	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
47		117
48	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
49	ev_tstamp ev_now;
50	int ev_method;
51
52	static int have_monotonic; /* runtime */
53
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
55	static void (*method_modify)(int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);
57		119
58	/*****************************************************************************/	120	/*****************************************************************************/
59		121
60	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#ifdef EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
61	ev_time (void)	156	ev_time (void)
62	{	157	{
63	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
64	struct timespec ts;	159	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	162	#else
68	struct timeval tv;	163	struct timeval tv;
69	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	166	#endif
72	}	167	}
73		168
74	static ev_tstamp	169	inline ev_tstamp
75	get_clock (void)	170	get_clock (void)
76	{	171	{
77	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
78	if (have_monotonic)	173	if (expect_true (have_monotonic))
79	{	174	{
80	struct timespec ts;	175	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	178	}
84	#endif	179	#endif
85		180
86	return ev_time ();	181	return ev_time ();
87	}	182	}
88		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
		190	#define array_roundsize(base,n) ((n) | 4 & ~3)
		191
89	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
91	{ \	194	{ \
92	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
94	base = realloc (base, sizeof (*base) * (newcnt)); \	202	base = realloc (base, sizeof (*base) * (newcnt)); \
95	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	204	cur = newcnt; \
97	}	205	}
98		206
99	/*****************************************************************************/	207	/*****************************************************************************/
100		208
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	209	static void
114	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
115	{	211	{
116	while (count--)	212	while (count--)
117	{	213	{
118	base->head = 0;	214	base->head = 0;
119	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
120	++base;	218	++base;
121	}	219	}
122	}	220	}
123		221
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	222	static void
134	event (W w, int events)	223	event (EV_P_ W w, int events)
135	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
		229	}
		230
136	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
138	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
140	}	235	}
141		236
142	static void	237	static void
		238	queue_events (EV_P_ W *events, int eventcnt, int type)
		239	{
		240	int i;
		241
		242	for (i = 0; i < eventcnt; ++i)
		243	event (EV_A_ events [i], type);
		244	}
		245
		246	static void
143	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
144	{	248	{
145	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	250	struct ev_io *w;
147		251
148	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
149	{	253	{
150	int ev = w->events & events;	254	int ev = w->events & events;
151		255
152	if (ev)	256	if (ev)
153	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
154	}	258	}
155	}	259	}
156		260
		261	/*****************************************************************************/
		262
157	static void	263	static void
158	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
159	{	265	{
160	int i;	266	int i;
161		267
162	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	269	{
		270	int fd = fdchanges [i];
		271	ANFD *anfd = anfds + fd;
		272	struct ev_io *w;
		273
		274	int events = 0;
		275
		276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		277	events |= w->events;
		278
		279	anfd->reify = 0;
		280
		281	if (anfd->events != events)
		282	{
		283	method_modify (EV_A_ fd, anfd->events, events);
		284	anfd->events = events;
		285	}
		286	}
		287
		288	fdchangecnt = 0;
		289	}
		290
		291	static void
		292	fd_change (EV_P_ int fd)
		293	{
		294	if (anfds [fd].reify || fdchangecnt < 0)
		295	return;
		296
		297	anfds [fd].reify = 1;
		298
		299	++fdchangecnt;
		300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		301	fdchanges [fdchangecnt - 1] = fd;
		302	}
		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		313	}
		314	}
		315
		316	/* called on EBADF to verify fds */
		317	static void
		318	fd_ebadf (EV_P)
		319	{
		320	int fd;
		321
		322	for (fd = 0; fd < anfdmax; ++fd)
		323	if (anfds [fd].events)
		324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
		336	{
		337	close (fd);
		338	fd_kill (EV_A_ fd);
		339	return;
		340	}
164	}	341	}
165		342
166	/*****************************************************************************/	343	/*****************************************************************************/
167		344
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	345	static void
175	upheap (struct ev_timer **timers, int k)	346	upheap (WT *heap, int k)
176	{	347	{
177	struct ev_timer *w = timers [k];	348	WT w = heap [k];
178		349
179	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
180	{	351	{
181	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
182	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
183	k >>= 1;	354	k >>= 1;
184	}	355	}
185		356
186	timers [k] = w;	357	heap [k] = w;
187	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
188		359
189	}	360	}
190		361
191	static void	362	static void
192	downheap (struct ev_timer **timers, int N, int k)	363	downheap (WT *heap, int N, int k)
193	{	364	{
194	struct ev_timer *w = timers [k];	365	WT w = heap [k];
195		366
196	while (k < (N >> 1))	367	while (k < (N >> 1))
197	{	368	{
198	int j = k << 1;	369	int j = k << 1;
199		370
200	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
201	++j;	372	++j;
202		373
203	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
204	break;	375	break;
205		376
206	timers [k] = timers [j];	377	heap [k] = heap [j];
207	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
208	k = j;	379	k = j;
209	}	380	}
210		381
211	timers [k] = w;	382	heap [k] = w;
212	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
213	}	384	}
214		385
215	/*****************************************************************************/	386	/*****************************************************************************/
216		387
217	typedef struct	388	typedef struct
218	{	389	{
219	struct ev_signal *head;	390	struct ev_watcher_list *head;
220	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
221	} ANSIG;	392	} ANSIG;
222		393
223	static ANSIG *signals;	394	static ANSIG *signals;
224	static int signalmax;	395	static int signalmax;
225		396
226	static int sigpipe [2];	397	static int sigpipe [2];
227	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;
229		399
230	static void	400	static void
231	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
232	{	402	{
233	while (count--)	403	while (count--)
234	{	404	{
235	base->head = 0;	405	base->head = 0;
236	base->gotsig = 0;	406	base->gotsig = 0;
		407
237	++base;	408	++base;
238	}	409	}
239	}	410	}
240		411
241	static void	412	static void
…		…
243	{	414	{
244	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
245		416
246	if (!gotsig)	417	if (!gotsig)
247	{	418	{
		419	int old_errno = errno;
248	gotsig = 1;	420	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
250	}	423	}
251	}	424	}
252		425
253	static void	426	static void
254	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	428	{
256	struct ev_signal *w;	429	struct ev_watcher_list *w;
257	int sig;	430	int signum;
258		431
		432	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	433	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		434
262	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
264	{	437	{
265	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
266		439
267	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
269	}	442	}
270	}	443	}
271		444
272	static void	445	static void
273	siginit (void)	446	siginit (EV_P)
274	{	447	{
		448	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		451
278	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
281		456
282	evio_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
284	}	460	}
285		461
286	/*****************************************************************************/	462	/*****************************************************************************/
287		463
288	static struct ev_idle **idles;	464	#ifndef WIN32
289	static int idlemax, idlecnt;
290		465
291	static struct ev_check **checks;	466	#ifndef WCONTINUED
292	static int checkmax, checkcnt;	467	# define WCONTINUED 0
		468	#endif
		469
		470	static void
		471	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		472	{
		473	struct ev_child *w;
		474
		475	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		476	if (w->pid == pid || !w->pid)
		477	{
		478	w->priority = sw->priority; /* need to do it *now* */
		479	w->rpid = pid;
		480	w->rstatus = status;
		481	event (EV_A_ (W)w, EV_CHILD);
		482	}
		483	}
		484
		485	static void
		486	childcb (EV_P_ struct ev_signal *sw, int revents)
		487	{
		488	int pid, status;
		489
		490	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		491	{
		492	/* make sure we are called again until all childs have been reaped */
		493	event (EV_A_ (W)sw, EV_SIGNAL);
		494
		495	child_reap (EV_A_ sw, pid, pid, status);
		496	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		497	}
		498	}
		499
		500	#endif
293		501
294	/*****************************************************************************/	502	/*****************************************************************************/
295		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
296	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	508	# include "ev_epoll.c"
298	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
299	#if HAVE_SELECT	513	#if EV_USE_SELECT
300	# include "ev_select.c"	514	# include "ev_select.c"
301	#endif	515	#endif
302		516
303	int ev_init (int flags)	517	int
		518	ev_version_major (void)
304	{	519	{
		520	return EV_VERSION_MAJOR;
		521	}
		522
		523	int
		524	ev_version_minor (void)
		525	{
		526	return EV_VERSION_MINOR;
		527	}
		528
		529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
		532	{
		533	#ifdef WIN32
		534	return 0;
		535	#else
		536	return getuid () != geteuid ()
		537	|| getgid () != getegid ();
		538	#endif
		539	}
		540
		541	int
		542	ev_method (EV_P)
		543	{
		544	return method;
		545	}
		546
		547	static void
		548	loop_init (EV_P_ int methods)
		549	{
		550	if (!method)
		551	{
305	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
306	{	553	{
307	struct timespec ts;	554	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	556	have_monotonic = 1;
310	}	557	}
311	#endif	558	#endif
312		559
313	ev_now = ev_time ();	560	rt_now = ev_time ();
314	now = get_clock ();	561	mn_now = get_clock ();
315	diff = ev_now - now;	562	now_floor = mn_now;
		563	rtmn_diff = rt_now - mn_now;
316		564
317	if (pipe (sigpipe))	565	if (pipe (sigpipe))
318	return 0;	566	return 0;
319		567
320	ev_method = EVMETHOD_NONE;	568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
		572	methods = EVMETHOD_ANY;
		573
		574	method = 0;
		575	#if EV_USE_KQUEUE
		576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		577	#endif
321	#if HAVE_EPOLL	578	#if EV_USE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
323	#endif	580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
324	#if HAVE_SELECT	584	#if EV_USE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
326	#endif	586	#endif
327		587
328	if (ev_method)	588	if (method)
329	{	589	{
330	evw_init (&sigev, sigcb, 0);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
331	siginit ();	592	siginit (EV_A);
332	}
333		593
		594	#ifndef WIN32
		595	ev_signal_init (&childev, childcb, SIGCHLD);
		596	ev_set_priority (&childev, EV_MAXPRI);
		597	ev_signal_start (EV_A_ &childev);
		598	ev_unref (EV_A); /* child watcher should not keep loop alive */
		599	#endif
		600	}
		601	}
		602
334	return ev_method;	603	return method;
335	}	604	}
		605
		606	#ifdef EV_MULTIPLICITY
		607
		608	struct ev_loop *
		609	ev_loop_new (int methods)
		610	{
		611	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		612
		613	loop_init (EV_A_ methods);
		614
		615	return loop;
		616	}
		617
		618	void
		619	ev_loop_delete (EV_P)
		620	{
		621	/*TODO*/
		622	free (loop);
		623	}
		624
		625	#else
		626
		627	int
		628	ev_init (int methods)
		629	{
		630	loop_init ();
		631	}
		632
		633	#endif
336		634
337	/*****************************************************************************/	635	/*****************************************************************************/
338		636
339	void ev_prefork (void)	637	void
		638	ev_fork_prepare (void)
340	{	639	{
341	/* nop */	640	/* nop */
342	}	641	}
343		642
		643	void
344	void ev_postfork_parent (void)	644	ev_fork_parent (void)
345	{	645	{
346	/* nop */	646	/* nop */
347	}	647	}
348		648
		649	void
349	void ev_postfork_child (void)	650	ev_fork_child (void)
350	{	651	{
		652	/*TODO*/
		653	#if !EV_MULTIPLICITY
351	#if HAVE_EPOLL	654	#if EV_USE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)	655	if (method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();	656	epoll_postfork_child (EV_A);
354	#endif	657	#endif
355		658
356	evio_stop (&sigev);	659	ev_io_stop (EV_A_ &sigev);
357	close (sigpipe [0]);	660	close (sigpipe [0]);
358	close (sigpipe [1]);	661	close (sigpipe [1]);
359	pipe (sigpipe);	662	pipe (sigpipe);
360	siginit ();	663	siginit (EV_A);
		664	#endif
361	}	665	}
362		666
363	/*****************************************************************************/	667	/*****************************************************************************/
364		668
365	static void	669	static void
366	fd_reify (void)	670	call_pending (EV_P)
367	{	671	{
368	int i;	672	int pri;
369		673
370	for (i = 0; i < fdchangecnt; ++i)	674	for (pri = NUMPRI; pri--; )
371	{	675	while (pendingcnt [pri])
372	int fd = fdchanges [i];
373	ANFD *anfd = anfds + fd;
374	struct ev_io *w;
375
376	int wev = 0;
377
378	for (w = anfd->head; w; w = w->next)
379	wev |= w->events;
380
381	if (anfd->wev != wev)
382	{	676	{
383	method_modify (fd, anfd->wev, wev);	677	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
384	anfd->wev = wev;
385	}
386	}
387		678
388	fdchangecnt = 0;
389	}
390
391	static void
392	call_pending ()
393	{
394	int i;
395
396	for (i = 0; i < pendingcnt; ++i)
397	{
398	ANPENDING *p = pendings + i;
399
400	if (p->w)	679	if (p->w)
401	{	680	{
402	p->w->pending = 0;	681	p->w->pending = 0;
403	p->w->cb (p->w, p->events);	682	p->w->cb (EV_A_ p->w, p->events);
404	}	683	}
405	}	684	}
406
407	pendingcnt = 0;
408	}	685	}
409		686
410	static void	687	static void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	688	timers_reify (EV_P)
412	{	689	{
413	while (timercnt && timers [0]->at <= now)	690	while (timercnt && timers [0]->at <= mn_now)
414	{	691	{
415	struct ev_timer *w = timers [0];	692	struct ev_timer *w = timers [0];
416		693
417	/* first reschedule or stop timer */	694	/* first reschedule or stop timer */
418	if (w->repeat)	695	if (w->repeat)
419	{	696	{
420	if (w->is_abs)	697	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
421	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
422	else
423	w->at = now + w->repeat;	698	w->at = mn_now + w->repeat;
424
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	699	downheap ((WT *)timers, timercnt, 0);
428	}	700	}
429	else	701	else
		702	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		703
		704	event (EV_A_ (W)w, EV_TIMEOUT);
		705	}
		706	}
		707
		708	static void
		709	periodics_reify (EV_P)
		710	{
		711	while (periodiccnt && periodics [0]->at <= rt_now)
		712	{
		713	struct ev_periodic *w = periodics [0];
		714
		715	/* first reschedule or stop timer */
		716	if (w->interval)
430	{	717	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	718	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
432	--timercnt; /* maybe pass by reference instead? */	719	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		720	downheap ((WT *)periodics, periodiccnt, 0);
433	}	721	}
		722	else
		723	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		724
435	event ((W)w, EV_TIMEOUT);	725	event (EV_A_ (W)w, EV_PERIODIC);
436	}	726	}
437	}	727	}
438		728
439	static void	729	static void
440	time_update ()	730	periodics_reschedule (EV_P)
441	{	731	{
442	int i;	732	int i;
443	ev_now = ev_time ();
444		733
445	if (have_monotonic)	734	/* adjust periodics after time jump */
		735	for (i = 0; i < periodiccnt; ++i)
446	{	736	{
447	ev_tstamp odiff = diff;	737	struct ev_periodic *w = periodics [i];
448		738
449	/* detecting time jumps is much more difficult */	739	if (w->interval)
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */
451	{	740	{
452	now = get_clock ();	741	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
453	diff = ev_now - now;
454		742
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	743	if (fabs (diff) >= 1e-4)
456	return; /* all is well */	744	{
		745	ev_periodic_stop (EV_A_ w);
		746	ev_periodic_start (EV_A_ w);
457		747
458	ev_now = ev_time ();	748	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		749	}
459	}	750	}
		751	}
		752	}
460		753
461	/* time jump detected, reschedule atimers */	754	inline int
462	for (i = 0; i < atimercnt; ++i)	755	time_update_monotonic (EV_P)
		756	{
		757	mn_now = get_clock ();
		758
		759	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		760	{
		761	rt_now = rtmn_diff + mn_now;
		762	return 0;
		763	}
		764	else
		765	{
		766	now_floor = mn_now;
		767	rt_now = ev_time ();
		768	return 1;
		769	}
		770	}
		771
		772	static void
		773	time_update (EV_P)
		774	{
		775	int i;
		776
		777	#if EV_USE_MONOTONIC
		778	if (expect_true (have_monotonic))
		779	{
		780	if (time_update_monotonic (EV_A))
463	{	781	{
464	struct ev_timer *w = atimers [i];	782	ev_tstamp odiff = rtmn_diff;
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	783
		784	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		785	{
		786	rtmn_diff = rt_now - mn_now;
		787
		788	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		789	return; /* all is well */
		790
		791	rt_now = ev_time ();
		792	mn_now = get_clock ();
		793	now_floor = mn_now;
		794	}
		795
		796	periodics_reschedule (EV_A);
		797	/* no timer adjustment, as the monotonic clock doesn't jump */
		798	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
466	}	799	}
467	}	800	}
468	else	801	else
		802	#endif
469	{	803	{
470	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	804	rt_now = ev_time ();
471	/* time jump detected, adjust rtimers */	805
		806	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		807	{
		808	periodics_reschedule (EV_A);
		809
		810	/* adjust timers. this is easy, as the offset is the same for all */
472	for (i = 0; i < rtimercnt; ++i)	811	for (i = 0; i < timercnt; ++i)
473	rtimers [i]->at += ev_now - now;	812	timers [i]->at += rt_now - mn_now;
		813	}
474		814
475	now = ev_now;	815	mn_now = rt_now;
476	}	816	}
477	}	817	}
478		818
479	int ev_loop_done;	819	void
		820	ev_ref (EV_P)
		821	{
		822	++activecnt;
		823	}
480		824
		825	void
		826	ev_unref (EV_P)
		827	{
		828	--activecnt;
		829	}
		830
		831	static int loop_done;
		832
		833	void
481	void ev_loop (int flags)	834	ev_loop (EV_P_ int flags)
482	{	835	{
483	double block;	836	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;	837	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
485
486	if (checkcnt)
487	{
488	queue_events ((W *)checks, checkcnt, EV_CHECK);
489	call_pending ();
490	}
491		838
492	do	839	do
493	{	840	{
		841	/* queue check watchers (and execute them) */
		842	if (expect_false (preparecnt))
		843	{
		844	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		845	call_pending (EV_A);
		846	}
		847
494	/* update fd-related kernel structures */	848	/* update fd-related kernel structures */
495	fd_reify ();	849	fd_reify (EV_A);
496		850
497	/* calculate blocking time */	851	/* calculate blocking time */
		852
		853	/* we only need this for !monotonic clockor timers, but as we basically
		854	always have timers, we just calculate it always */
		855	#if EV_USE_MONOTONIC
		856	if (expect_true (have_monotonic))
		857	time_update_monotonic (EV_A);
		858	else
		859	#endif
		860	{
		861	rt_now = ev_time ();
		862	mn_now = rt_now;
		863	}
		864
498	if (flags & EVLOOP_NONBLOCK || idlecnt)	865	if (flags & EVLOOP_NONBLOCK || idlecnt)
499	block = 0.;	866	block = 0.;
500	else	867	else
501	{	868	{
502	block = MAX_BLOCKTIME;	869	block = MAX_BLOCKTIME;
503		870
504	if (rtimercnt)	871	if (timercnt)
505	{	872	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	873	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
507	if (block > to) block = to;	874	if (block > to) block = to;
508	}	875	}
509		876
510	if (atimercnt)	877	if (periodiccnt)
511	{	878	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	879	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
513	if (block > to) block = to;	880	if (block > to) block = to;
514	}	881	}
515		882
516	if (block < 0.) block = 0.;	883	if (block < 0.) block = 0.;
517	}	884	}
518		885
519	method_poll (block);	886	method_poll (EV_A_ block);
520		887
521	/* update ev_now, do magic */	888	/* update rt_now, do magic */
522	time_update ();	889	time_update (EV_A);
523		890
524	/* queue pending timers and reschedule them */	891	/* queue pending timers and reschedule them */
525	/* absolute timers first */	892	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	893	periodics_reify (EV_A); /* absolute timers called first */
527	/* relative timers second */
528	timers_reify (rtimers, rtimercnt, now);
529		894
530	/* queue idle watchers unless io or timers are pending */	895	/* queue idle watchers unless io or timers are pending */
531	if (!pendingcnt)	896	if (!pendingcnt)
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	897	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
533		898
534	/* queue check and possibly idle watchers */	899	/* queue check watchers, to be executed first */
		900	if (checkcnt)
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	901	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		902
537	call_pending ();	903	call_pending (EV_A);
538	}	904	}
539	while (!ev_loop_done);	905	while (activecnt && !loop_done);
		906
		907	if (loop_done != 2)
		908	loop_done = 0;
		909	}
		910
		911	void
		912	ev_unloop (EV_P_ int how)
		913	{
		914	loop_done = how;
540	}	915	}
541		916
542	/*****************************************************************************/	917	/*****************************************************************************/
543		918
544	static void	919	inline void
545	wlist_add (WL *head, WL elem)	920	wlist_add (WL *head, WL elem)
546	{	921	{
547	elem->next = *head;	922	elem->next = *head;
548	*head = elem;	923	*head = elem;
549	}	924	}
550		925
551	static void	926	inline void
552	wlist_del (WL *head, WL elem)	927	wlist_del (WL *head, WL elem)
553	{	928	{
554	while (*head)	929	while (*head)
555	{	930	{
556	if (*head == elem)	931	if (*head == elem)
…		…
561		936
562	head = &(*head)->next;	937	head = &(*head)->next;
563	}	938	}
564	}	939	}
565		940
566	static void	941	inline void
		942	ev_clear_pending (EV_P_ W w)
		943	{
		944	if (w->pending)
		945	{
		946	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		947	w->pending = 0;
		948	}
		949	}
		950
		951	inline void
567	ev_start (W w, int active)	952	ev_start (EV_P_ W w, int active)
568	{	953	{
569	w->pending = 0;	954	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		955	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		956
570	w->active = active;	957	w->active = active;
		958	ev_ref (EV_A);
571	}	959	}
572		960
573	static void	961	inline void
574	ev_stop (W w)	962	ev_stop (EV_P_ W w)
575	{	963	{
576	if (w->pending)	964	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	965	w->active = 0;
580	}	966	}
581		967
582	/*****************************************************************************/	968	/*****************************************************************************/
583		969
584	void	970	void
585	evio_start (struct ev_io *w)	971	ev_io_start (EV_P_ struct ev_io *w)
586	{	972	{
		973	int fd = w->fd;
		974
587	if (ev_is_active (w))	975	if (ev_is_active (w))
588	return;	976	return;
589		977
590	int fd = w->fd;	978	assert (("ev_io_start called with negative fd", fd >= 0));
591		979
592	ev_start ((W)w, 1);	980	ev_start (EV_A_ (W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	981	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);	982	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595		983
596	++fdchangecnt;	984	fd_change (EV_A_ fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}	985	}
600		986
601	void	987	void
602	evio_stop (struct ev_io *w)	988	ev_io_stop (EV_P_ struct ev_io *w)
603	{	989	{
		990	ev_clear_pending (EV_A_ (W)w);
604	if (!ev_is_active (w))	991	if (!ev_is_active (w))
605	return;	992	return;
606		993
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	994	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);	995	ev_stop (EV_A_ (W)w);
609		996
610	++fdchangecnt;	997	fd_change (EV_A_ w->fd);
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}	998	}
614		999
615	void	1000	void
616	evtimer_start (struct ev_timer *w)	1001	ev_timer_start (EV_P_ struct ev_timer *w)
617	{	1002	{
618	if (ev_is_active (w))	1003	if (ev_is_active (w))
619	return;	1004	return;
620		1005
621	if (w->is_abs)	1006	w->at += mn_now;
		1007
		1008	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1009
		1010	ev_start (EV_A_ (W)w, ++timercnt);
		1011	array_needsize (timers, timermax, timercnt, );
		1012	timers [timercnt - 1] = w;
		1013	upheap ((WT *)timers, timercnt - 1);
		1014	}
		1015
		1016	void
		1017	ev_timer_stop (EV_P_ struct ev_timer *w)
		1018	{
		1019	ev_clear_pending (EV_A_ (W)w);
		1020	if (!ev_is_active (w))
		1021	return;
		1022
		1023	if (w->active < timercnt--)
		1024	{
		1025	timers [w->active - 1] = timers [timercnt];
		1026	downheap ((WT *)timers, timercnt, w->active - 1);
622	{	1027	}
623	/* this formula differs from the one in timer_reify becuse we do not round up */	1028
		1029	w->at = w->repeat;
		1030
		1031	ev_stop (EV_A_ (W)w);
		1032	}
		1033
		1034	void
		1035	ev_timer_again (EV_P_ struct ev_timer *w)
		1036	{
		1037	if (ev_is_active (w))
		1038	{
624	if (w->repeat)	1039	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1040	{
626		1041	w->at = mn_now + w->repeat;
627	ev_start ((W)w, ++atimercnt);	1042	downheap ((WT *)timers, timercnt, w->active - 1);
628	array_needsize (atimers, atimermax, atimercnt, );	1043	}
629	atimers [atimercnt - 1] = w;
630	upheap (atimers, atimercnt - 1);
631	}
632	else	1044	else
		1045	ev_timer_stop (EV_A_ w);
633	{	1046	}
634	w->at += now;	1047	else if (w->repeat)
635		1048	ev_timer_start (EV_A_ w);
636	ev_start ((W)w, ++rtimercnt);
637	array_needsize (rtimers, rtimermax, rtimercnt, );
638	rtimers [rtimercnt - 1] = w;
639	upheap (rtimers, rtimercnt - 1);
640	}
641
642	}	1049	}
643		1050
644	void	1051	void
645	evtimer_stop (struct ev_timer *w)	1052	ev_periodic_start (EV_P_ struct ev_periodic *w)
646	{	1053	{
		1054	if (ev_is_active (w))
		1055	return;
		1056
		1057	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1058
		1059	/* this formula differs from the one in periodic_reify because we do not always round up */
		1060	if (w->interval)
		1061	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1062
		1063	ev_start (EV_A_ (W)w, ++periodiccnt);
		1064	array_needsize (periodics, periodicmax, periodiccnt, );
		1065	periodics [periodiccnt - 1] = w;
		1066	upheap ((WT *)periodics, periodiccnt - 1);
		1067	}
		1068
		1069	void
		1070	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1071	{
		1072	ev_clear_pending (EV_A_ (W)w);
647	if (!ev_is_active (w))	1073	if (!ev_is_active (w))
648	return;	1074	return;
649		1075
650	if (w->is_abs)
651	{
652	if (w->active < atimercnt--)	1076	if (w->active < periodiccnt--)
653	{
654	atimers [w->active - 1] = atimers [atimercnt];
655	downheap (atimers, atimercnt, w->active - 1);
656	}
657	}	1077	{
658	else	1078	periodics [w->active - 1] = periodics [periodiccnt];
		1079	downheap ((WT *)periodics, periodiccnt, w->active - 1);
659	{	1080	}
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}
666		1081
667	ev_stop ((W)w);	1082	ev_stop (EV_A_ (W)w);
668	}	1083	}
669		1084
		1085	#ifndef SA_RESTART
		1086	# define SA_RESTART 0
		1087	#endif
		1088
670	void	1089	void
671	evsignal_start (struct ev_signal *w)	1090	ev_signal_start (EV_P_ struct ev_signal *w)
672	{	1091	{
673	if (ev_is_active (w))	1092	if (ev_is_active (w))
674	return;	1093	return;
675		1094
		1095	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1096
676	ev_start ((W)w, 1);	1097	ev_start (EV_A_ (W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	1098	array_needsize (signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1099	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		1100
680	if (!w->next)	1101	if (!w->next)
681	{	1102	{
682	struct sigaction sa;	1103	struct sigaction sa;
683	sa.sa_handler = sighandler;	1104	sa.sa_handler = sighandler;
684	sigfillset (&sa.sa_mask);	1105	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	1106	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	1107	sigaction (w->signum, &sa, 0);
687	}	1108	}
688	}	1109	}
689		1110
690	void	1111	void
691	evsignal_stop (struct ev_signal *w)	1112	ev_signal_stop (EV_P_ struct ev_signal *w)
692	{	1113	{
		1114	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
694	return;	1116	return;
695		1117
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1118	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	1119	ev_stop (EV_A_ (W)w);
698		1120
699	if (!signals [w->signum - 1].head)	1121	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	1122	signal (w->signum, SIG_DFL);
701	}	1123	}
702		1124
		1125	void
703	void evidle_start (struct ev_idle *w)	1126	ev_idle_start (EV_P_ struct ev_idle *w)
704	{	1127	{
705	if (ev_is_active (w))	1128	if (ev_is_active (w))
706	return;	1129	return;
707		1130
708	ev_start ((W)w, ++idlecnt);	1131	ev_start (EV_A_ (W)w, ++idlecnt);
709	array_needsize (idles, idlemax, idlecnt, );	1132	array_needsize (idles, idlemax, idlecnt, );
710	idles [idlecnt - 1] = w;	1133	idles [idlecnt - 1] = w;
711	}	1134	}
712		1135
		1136	void
713	void evidle_stop (struct ev_idle *w)	1137	ev_idle_stop (EV_P_ struct ev_idle *w)
714	{	1138	{
		1139	ev_clear_pending (EV_A_ (W)w);
		1140	if (ev_is_active (w))
		1141	return;
		1142
715	idles [w->active - 1] = idles [--idlecnt];	1143	idles [w->active - 1] = idles [--idlecnt];
716	ev_stop ((W)w);	1144	ev_stop (EV_A_ (W)w);
717	}	1145	}
718		1146
719	void evcheck_start (struct ev_check *w)	1147	void
		1148	ev_prepare_start (EV_P_ struct ev_prepare *w)
720	{	1149	{
721	if (ev_is_active (w))	1150	if (ev_is_active (w))
722	return;	1151	return;
723		1152
		1153	ev_start (EV_A_ (W)w, ++preparecnt);
		1154	array_needsize (prepares, preparemax, preparecnt, );
		1155	prepares [preparecnt - 1] = w;
		1156	}
		1157
		1158	void
		1159	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1160	{
		1161	ev_clear_pending (EV_A_ (W)w);
		1162	if (ev_is_active (w))
		1163	return;
		1164
		1165	prepares [w->active - 1] = prepares [--preparecnt];
		1166	ev_stop (EV_A_ (W)w);
		1167	}
		1168
		1169	void
		1170	ev_check_start (EV_P_ struct ev_check *w)
		1171	{
		1172	if (ev_is_active (w))
		1173	return;
		1174
724	ev_start ((W)w, ++checkcnt);	1175	ev_start (EV_A_ (W)w, ++checkcnt);
725	array_needsize (checks, checkmax, checkcnt, );	1176	array_needsize (checks, checkmax, checkcnt, );
726	checks [checkcnt - 1] = w;	1177	checks [checkcnt - 1] = w;
727	}	1178	}
728		1179
		1180	void
729	void evcheck_stop (struct ev_check *w)	1181	ev_check_stop (EV_P_ struct ev_check *w)
730	{	1182	{
		1183	ev_clear_pending (EV_A_ (W)w);
		1184	if (ev_is_active (w))
		1185	return;
		1186
731	checks [w->active - 1] = checks [--checkcnt];	1187	checks [w->active - 1] = checks [--checkcnt];
732	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
		1189	}
		1190
		1191	void
		1192	ev_child_start (EV_P_ struct ev_child *w)
		1193	{
		1194	if (ev_is_active (w))
		1195	return;
		1196
		1197	ev_start (EV_A_ (W)w, 1);
		1198	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1199	}
		1200
		1201	void
		1202	ev_child_stop (EV_P_ struct ev_child *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1209	ev_stop (EV_A_ (W)w);
733	}	1210	}
734		1211
735	/*****************************************************************************/	1212	/*****************************************************************************/
736		1213
		1214	struct ev_once
		1215	{
		1216	struct ev_io io;
		1217	struct ev_timer to;
		1218	void (*cb)(int revents, void *arg);
		1219	void *arg;
		1220	};
		1221
		1222	static void
		1223	once_cb (EV_P_ struct ev_once *once, int revents)
		1224	{
		1225	void (*cb)(int revents, void *arg) = once->cb;
		1226	void *arg = once->arg;
		1227
		1228	ev_io_stop (EV_A_ &once->io);
		1229	ev_timer_stop (EV_A_ &once->to);
		1230	free (once);
		1231
		1232	cb (revents, arg);
		1233	}
		1234
		1235	static void
		1236	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1237	{
		1238	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1239	}
		1240
		1241	static void
		1242	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1243	{
		1244	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1245	}
		1246
		1247	void
		1248	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1249	{
		1250	struct ev_once *once = malloc (sizeof (struct ev_once));
		1251
		1252	if (!once)
		1253	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1254	else
		1255	{
		1256	once->cb = cb;
		1257	once->arg = arg;
		1258
		1259	ev_watcher_init (&once->io, once_cb_io);
		1260	if (fd >= 0)
		1261	{
		1262	ev_io_set (&once->io, fd, events);
		1263	ev_io_start (EV_A_ &once->io);
		1264	}
		1265
		1266	ev_watcher_init (&once->to, once_cb_to);
		1267	if (timeout >= 0.)
		1268	{
		1269	ev_timer_set (&once->to, timeout, 0.);
		1270	ev_timer_start (EV_A_ &once->to);
		1271	}
		1272	}
		1273	}
		1274
		1275	/*****************************************************************************/
		1276
737	#if 0	1277	#if 0
738		1278
		1279	struct ev_io wio;
		1280
739	static void	1281	static void
740	sin_cb (struct ev_io *w, int revents)	1282	sin_cb (struct ev_io *w, int revents)
741	{	1283	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1284	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
743	}	1285	}
744		1286
745	static void	1287	static void
746	ocb (struct ev_timer *w, int revents)	1288	ocb (struct ev_timer *w, int revents)
747	{	1289	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1290	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
749	evtimer_stop (w);	1291	ev_timer_stop (w);
750	evtimer_start (w);	1292	ev_timer_start (w);
751	}	1293	}
752		1294
753	static void	1295	static void
754	scb (struct ev_signal *w, int revents)	1296	scb (struct ev_signal *w, int revents)
755	{	1297	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1298	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1299	ev_io_stop (&wio);
		1300	ev_io_start (&wio);
757	}	1301	}
758		1302
759	static void	1303	static void
760	gcb (struct ev_signal *w, int revents)	1304	gcb (struct ev_signal *w, int revents)
761	{	1305	{
762	fprintf (stderr, "generic %x\n", revents);	1306	fprintf (stderr, "generic %x\n", revents);
		1307
763	}	1308	}
764		1309
765	int main (void)	1310	int main (void)
766	{	1311	{
767	struct ev_io sin;
768
769	ev_init (0);	1312	ev_init (0);
770		1313
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);	1314	ev_io_init (&wio, sin_cb, 0, EV_READ);
773	evio_start (&sin);	1315	ev_io_start (&wio);
774		1316
775	struct ev_timer t[10000];	1317	struct ev_timer t[10000];
776		1318
777	#if 0	1319	#if 0
778	int i;	1320	int i;
779	for (i = 0; i < 10000; ++i)	1321	for (i = 0; i < 10000; ++i)
780	{	1322	{
781	struct ev_timer *w = t + i;	1323	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);	1324	ev_watcher_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);	1325	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
784	evtimer_start (w);	1326	ev_timer_start (w);
785	if (drand48 () < 0.5)	1327	if (drand48 () < 0.5)
786	evtimer_stop (w);	1328	ev_timer_stop (w);
787	}	1329	}
788	#endif	1330	#endif
789		1331
790	struct ev_timer t1;	1332	struct ev_timer t1;
791	evw_init (&t1, ocb, 0);	1333	ev_timer_init (&t1, ocb, 5, 10);
792	evtimer_set_abs (&t1, 5, 10);
793	evtimer_start (&t1);	1334	ev_timer_start (&t1);
794		1335
795	struct ev_signal sig;	1336	struct ev_signal sig;
796	evw_init (&sig, scb, 65535);
797	evsignal_set (&sig, SIGQUIT);	1337	ev_signal_init (&sig, scb, SIGQUIT);
798	evsignal_start (&sig);	1338	ev_signal_start (&sig);
799		1339
800	struct ev_check cw;	1340	struct ev_check cw;
801	evw_init (&cw, gcb, 0);	1341	ev_check_init (&cw, gcb);
802	evcheck_start (&cw);	1342	ev_check_start (&cw);
803		1343
804	struct ev_idle iw;	1344	struct ev_idle iw;
805	evw_init (&iw, gcb, 0);	1345	ev_idle_init (&iw, gcb);
806	evidle_start (&iw);	1346	ev_idle_start (&iw);
807		1347
808	ev_loop (0);	1348	ev_loop (0);
809		1349
810	return 0;	1350	return 0;
811	}	1351	}

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