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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 1.51 by root, Sat Nov 3 21:58:51 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 ev_tstamp now_floor, mn_now, diff; /* monotonic clock */
49	ev_tstamp ev_now;	119	static ev_tstamp rt_now;
50	int ev_method;	120	static int method;
51		121
52	static int have_monotonic; /* runtime */	122	static int have_monotonic; /* runtime */
53		123
54	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
55	static void (*method_modify)(int fd, int oev, int nev);	125	static void (*method_modify)(EV_P_ int fd, int oev, int nev);
56	static void (*method_poll)(ev_tstamp timeout);	126	static void (*method_poll)(EV_P_ ev_tstamp timeout);
		127
		128	static int activecnt; /* number of active events */
		129
		130	#if EV_USE_SELECT
		131	static unsigned char *vec_ri, *vec_ro, *vec_wi, *vec_wo;
		132	static int vec_max;
		133	#endif
		134
		135	#if EV_USEV_POLL
		136	static struct pollfd *polls;
		137	static int pollmax, pollcnt;
		138	static int *pollidxs; /* maps fds into structure indices */
		139	static int pollidxmax;
		140	#endif
		141
		142	#if EV_USE_EPOLL
		143	static int epoll_fd = -1;
		144
		145	static struct epoll_event *events;
		146	static int eventmax;
		147	#endif
		148
		149	#if EV_USE_KQUEUE
		150	static int kqueue_fd;
		151	static struct kevent *kqueue_changes;
		152	static int kqueue_changemax, kqueue_changecnt;
		153	static struct kevent *kqueue_events;
		154	static int kqueue_eventmax;
		155	#endif
57		156
58	/*****************************************************************************/	157	/*****************************************************************************/
59		158
60	ev_tstamp	159	inline ev_tstamp
61	ev_time (void)	160	ev_time (void)
62	{	161	{
63	#if HAVE_REALTIME	162	#if EV_USE_REALTIME
64	struct timespec ts;	163	struct timespec ts;
65	clock_gettime (CLOCK_REALTIME, &ts);	164	clock_gettime (CLOCK_REALTIME, &ts);
66	return ts.tv_sec + ts.tv_nsec * 1e-9;	165	return ts.tv_sec + ts.tv_nsec * 1e-9;
67	#else	166	#else
68	struct timeval tv;	167	struct timeval tv;
69	gettimeofday (&tv, 0);	168	gettimeofday (&tv, 0);
70	return tv.tv_sec + tv.tv_usec * 1e-6;	169	return tv.tv_sec + tv.tv_usec * 1e-6;
71	#endif	170	#endif
72	}	171	}
73		172
74	static ev_tstamp	173	inline ev_tstamp
75	get_clock (void)	174	get_clock (void)
76	{	175	{
77	#if HAVE_MONOTONIC	176	#if EV_USE_MONOTONIC
78	if (have_monotonic)	177	if (expect_true (have_monotonic))
79	{	178	{
80	struct timespec ts;	179	struct timespec ts;
81	clock_gettime (CLOCK_MONOTONIC, &ts);	180	clock_gettime (CLOCK_MONOTONIC, &ts);
82	return ts.tv_sec + ts.tv_nsec * 1e-9;	181	return ts.tv_sec + ts.tv_nsec * 1e-9;
83	}	182	}
84	#endif	183	#endif
85		184
86	return ev_time ();	185	return ev_time ();
87	}	186	}
88		187
		188	ev_tstamp
		189	ev_now (EV_P)
		190	{
		191	return rt_now;
		192	}
		193
		194	#define array_roundsize(base,n) ((n) | 4 & ~3)
		195
89	#define array_needsize(base,cur,cnt,init) \	196	#define array_needsize(base,cur,cnt,init) \
90	if ((cnt) > cur) \	197	if (expect_false ((cnt) > cur)) \
91	{ \	198	{ \
92	int newcnt = cur ? cur << 1 : 16; \	199	int newcnt = cur; \
93	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	200	do \
		201	{ \
		202	newcnt = array_roundsize (base, newcnt << 1); \
		203	} \
		204	while ((cnt) > newcnt); \
		205	\
94	base = realloc (base, sizeof (*base) * (newcnt)); \	206	base = realloc (base, sizeof (*base) * (newcnt)); \
95	init (base + cur, newcnt - cur); \	207	init (base + cur, newcnt - cur); \
96	cur = newcnt; \	208	cur = newcnt; \
97	}	209	}
98		210
99	/*****************************************************************************/	211	/*****************************************************************************/
100		212
101	typedef struct	213	typedef struct
102	{	214	{
103	struct ev_io *head;	215	struct ev_watcher_list *head;
104	unsigned char wev, rev; /* want, received event set */	216	unsigned char events;
		217	unsigned char reify;
105	} ANFD;	218	} ANFD;
106		219
107	static ANFD *anfds;	220	static ANFD *anfds;
108	static int anfdmax;	221	static int anfdmax;
109		222
110	static int *fdchanges;
111	static int fdchangemax, fdchangecnt;
112
113	static void	223	static void
114	anfds_init (ANFD *base, int count)	224	anfds_init (ANFD *base, int count)
115	{	225	{
116	while (count--)	226	while (count--)
117	{	227	{
118	base->head = 0;	228	base->head = 0;
119	base->wev = base->rev = EV_NONE;	229	base->events = EV_NONE;
		230	base->reify = 0;
		231
120	++base;	232	++base;
121	}	233	}
122	}	234	}
123		235
124	typedef struct	236	typedef struct
125	{	237	{
126	W w;	238	W w;
127	int events;	239	int events;
128	} ANPENDING;	240	} ANPENDING;
129		241
130	static ANPENDING *pendings;	242	static ANPENDING *pendings [NUMPRI];
131	static int pendingmax, pendingcnt;	243	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
132		244
133	static void	245	static void
134	event (W w, int events)	246	event (EV_P_ W w, int events)
135	{	247	{
		248	if (w->pending)
		249	{
		250	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		251	return;
		252	}
		253
136	w->pending = ++pendingcnt;	254	w->pending = ++pendingcnt [ABSPRI (w)];
137	array_needsize (pendings, pendingmax, pendingcnt, );	255	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
138	pendings [pendingcnt - 1].w = w;	256	pendings [ABSPRI (w)][w->pending - 1].w = w;
139	pendings [pendingcnt - 1].events = events;	257	pendings [ABSPRI (w)][w->pending - 1].events = events;
140	}	258	}
141		259
142	static void	260	static void
		261	queue_events (EV_P_ W *events, int eventcnt, int type)
		262	{
		263	int i;
		264
		265	for (i = 0; i < eventcnt; ++i)
		266	event (EV_A_ events [i], type);
		267	}
		268
		269	static void
143	fd_event (int fd, int events)	270	fd_event (EV_P_ int fd, int events)
144	{	271	{
145	ANFD *anfd = anfds + fd;	272	ANFD *anfd = anfds + fd;
146	struct ev_io *w;	273	struct ev_io *w;
147		274
148	for (w = anfd->head; w; w = w->next)	275	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
149	{	276	{
150	int ev = w->events & events;	277	int ev = w->events & events;
151		278
152	if (ev)	279	if (ev)
153	event ((W)w, ev);	280	event (EV_A_ (W)w, ev);
154	}	281	}
155	}	282	}
156		283
		284	/*****************************************************************************/
		285
		286	static int *fdchanges;
		287	static int fdchangemax, fdchangecnt;
		288
157	static void	289	static void
158	queue_events (W *events, int eventcnt, int type)	290	fd_reify (EV_P)
159	{	291	{
160	int i;	292	int i;
161		293
162	for (i = 0; i < eventcnt; ++i)	294	for (i = 0; i < fdchangecnt; ++i)
163	event (events [i], type);	295	{
		296	int fd = fdchanges [i];
		297	ANFD *anfd = anfds + fd;
		298	struct ev_io *w;
		299
		300	int events = 0;
		301
		302	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
		303	events |= w->events;
		304
		305	anfd->reify = 0;
		306
		307	if (anfd->events != events)
		308	{
		309	method_modify (EV_A_ fd, anfd->events, events);
		310	anfd->events = events;
		311	}
		312	}
		313
		314	fdchangecnt = 0;
		315	}
		316
		317	static void
		318	fd_change (EV_P_ int fd)
		319	{
		320	if (anfds [fd].reify || fdchangecnt < 0)
		321	return;
		322
		323	anfds [fd].reify = 1;
		324
		325	++fdchangecnt;
		326	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
		327	fdchanges [fdchangecnt - 1] = fd;
		328	}
		329
		330	static void
		331	fd_kill (EV_P_ int fd)
		332	{
		333	struct ev_io *w;
		334
		335	while ((w = (struct ev_io *)anfds [fd].head))
		336	{
		337	ev_io_stop (EV_A_ w);
		338	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		339	}
		340	}
		341
		342	/* called on EBADF to verify fds */
		343	static void
		344	fd_ebadf (EV_P)
		345	{
		346	int fd;
		347
		348	for (fd = 0; fd < anfdmax; ++fd)
		349	if (anfds [fd].events)
		350	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		351	fd_kill (EV_A_ fd);
		352	}
		353
		354	/* called on ENOMEM in select/poll to kill some fds and retry */
		355	static void
		356	fd_enomem (EV_P)
		357	{
		358	int fd = anfdmax;
		359
		360	while (fd--)
		361	if (anfds [fd].events)
		362	{
		363	close (fd);
		364	fd_kill (EV_A_ fd);
		365	return;
		366	}
164	}	367	}
165		368
166	/*****************************************************************************/	369	/*****************************************************************************/
167		370
168	static struct ev_timer **atimers;	371	static struct ev_timer **timers;
169	static int atimermax, atimercnt;	372	static int timermax, timercnt;
170		373
171	static struct ev_timer **rtimers;	374	static struct ev_periodic **periodics;
172	static int rtimermax, rtimercnt;	375	static int periodicmax, periodiccnt;
173		376
174	static void	377	static void
175	upheap (struct ev_timer **timers, int k)	378	upheap (WT *timers, int k)
176	{	379	{
177	struct ev_timer *w = timers [k];	380	WT w = timers [k];
178		381
179	while (k && timers [k >> 1]->at > w->at)	382	while (k && timers [k >> 1]->at > w->at)
180	{	383	{
181	timers [k] = timers [k >> 1];	384	timers [k] = timers [k >> 1];
182	timers [k]->active = k + 1;	385	timers [k]->active = k + 1;
…		…
187	timers [k]->active = k + 1;	390	timers [k]->active = k + 1;
188		391
189	}	392	}
190		393
191	static void	394	static void
192	downheap (struct ev_timer **timers, int N, int k)	395	downheap (WT *timers, int N, int k)
193	{	396	{
194	struct ev_timer *w = timers [k];	397	WT w = timers [k];
195		398
196	while (k < (N >> 1))	399	while (k < (N >> 1))
197	{	400	{
198	int j = k << 1;	401	int j = k << 1;
199		402
…		…
214		417
215	/*****************************************************************************/	418	/*****************************************************************************/
216		419
217	typedef struct	420	typedef struct
218	{	421	{
219	struct ev_signal *head;	422	struct ev_watcher_list *head;
220	sig_atomic_t gotsig;	423	sig_atomic_t volatile gotsig;
221	} ANSIG;	424	} ANSIG;
222		425
223	static ANSIG *signals;	426	static ANSIG *signals;
224	static int signalmax;	427	static int signalmax;
225		428
226	static int sigpipe [2];	429	static int sigpipe [2];
227	static sig_atomic_t gotsig;	430	static sig_atomic_t volatile gotsig;
228	static struct ev_io sigev;	431	static struct ev_io sigev;
229		432
230	static void	433	static void
231	signals_init (ANSIG *base, int count)	434	signals_init (ANSIG *base, int count)
232	{	435	{
233	while (count--)	436	while (count--)
234	{	437	{
235	base->head = 0;	438	base->head = 0;
236	base->gotsig = 0;	439	base->gotsig = 0;
		440
237	++base;	441	++base;
238	}	442	}
239	}	443	}
240		444
241	static void	445	static void
…		…
243	{	447	{
244	signals [signum - 1].gotsig = 1;	448	signals [signum - 1].gotsig = 1;
245		449
246	if (!gotsig)	450	if (!gotsig)
247	{	451	{
		452	int old_errno = errno;
248	gotsig = 1;	453	gotsig = 1;
249	write (sigpipe [1], &gotsig, 1);	454	write (sigpipe [1], &signum, 1);
		455	errno = old_errno;
250	}	456	}
251	}	457	}
252		458
253	static void	459	static void
254	sigcb (struct ev_io *iow, int revents)	460	sigcb (EV_P_ struct ev_io *iow, int revents)
255	{	461	{
256	struct ev_signal *w;	462	struct ev_watcher_list *w;
257	int sig;	463	int signum;
258		464
		465	read (sigpipe [0], &revents, 1);
259	gotsig = 0;	466	gotsig = 0;
260	read (sigpipe [0], &revents, 1);
261		467
262	for (sig = signalmax; sig--; )	468	for (signum = signalmax; signum--; )
263	if (signals [sig].gotsig)	469	if (signals [signum].gotsig)
264	{	470	{
265	signals [sig].gotsig = 0;	471	signals [signum].gotsig = 0;
266		472
267	for (w = signals [sig].head; w; w = w->next)	473	for (w = signals [signum].head; w; w = w->next)
268	event ((W)w, EV_SIGNAL);	474	event (EV_A_ (W)w, EV_SIGNAL);
269	}	475	}
270	}	476	}
271		477
272	static void	478	static void
273	siginit (void)	479	siginit (EV_P)
274	{	480	{
		481	#ifndef WIN32
275	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	482	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
276	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	483	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
277		484
278	/* rather than sort out wether we really need nb, set it */	485	/* rather than sort out wether we really need nb, set it */
279	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	486	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
280	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	487	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		488	#endif
281		489
282	evio_set (&sigev, sigpipe [0], EV_READ);	490	ev_io_set (&sigev, sigpipe [0], EV_READ);
283	evio_start (&sigev);	491	ev_io_start (&sigev);
284	}	492	}
285		493
286	/*****************************************************************************/	494	/*****************************************************************************/
287		495
288	static struct ev_idle **idles;	496	static struct ev_idle **idles;
289	static int idlemax, idlecnt;	497	static int idlemax, idlecnt;
290		498
		499	static struct ev_prepare **prepares;
		500	static int preparemax, preparecnt;
		501
291	static struct ev_check **checks;	502	static struct ev_check **checks;
292	static int checkmax, checkcnt;	503	static int checkmax, checkcnt;
293		504
294	/*****************************************************************************/	505	/*****************************************************************************/
295		506
		507	static struct ev_child *childs [PID_HASHSIZE];
		508	static struct ev_signal childev;
		509
		510	#ifndef WIN32
		511
		512	#ifndef WCONTINUED
		513	# define WCONTINUED 0
		514	#endif
		515
		516	static void
		517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
		518	{
		519	struct ev_child *w;
		520
		521	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		522	if (w->pid == pid || !w->pid)
		523	{
		524	w->priority = sw->priority; /* need to do it *now* */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
		534	int pid, status;
		535
		536	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
		537	{
		538	/* make sure we are called again until all childs have been reaped */
		539	event (EV_A_ (W)sw, EV_SIGNAL);
		540
		541	child_reap (EV_A_ sw, pid, pid, status);
		542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
		544	}
		545
		546	#endif
		547
		548	/*****************************************************************************/
		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
296	#if HAVE_EPOLL	553	#if EV_USE_EPOLL
297	# include "ev_epoll.c"	554	# include "ev_epoll.c"
298	#endif	555	#endif
		556	#if EV_USEV_POLL
		557	# include "ev_poll.c"
		558	#endif
299	#if HAVE_SELECT	559	#if EV_USE_SELECT
300	# include "ev_select.c"	560	# include "ev_select.c"
301	#endif	561	#endif
302		562
303	int ev_init (int flags)	563	int
		564	ev_version_major (void)
304	{	565	{
		566	return EV_VERSION_MAJOR;
		567	}
		568
		569	int
		570	ev_version_minor (void)
		571	{
		572	return EV_VERSION_MINOR;
		573	}
		574
		575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
		578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	|| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	int
		594	ev_init (EV_P_ int methods)
		595	{
		596	if (!method)
		597	{
305	#if HAVE_MONOTONIC	598	#if EV_USE_MONOTONIC
306	{	599	{
307	struct timespec ts;	600	struct timespec ts;
308	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
309	have_monotonic = 1;	602	have_monotonic = 1;
310	}	603	}
311	#endif	604	#endif
312		605
313	ev_now = ev_time ();	606	rt_now = ev_time ();
314	now = get_clock ();	607	mn_now = get_clock ();
		608	now_floor = mn_now;
315	diff = ev_now - now;	609	diff = rt_now - mn_now;
316		610
317	if (pipe (sigpipe))	611	if (pipe (sigpipe))
318	return 0;	612	return 0;
319		613
320	ev_method = EVMETHOD_NONE;	614	if (methods == EVMETHOD_AUTO)
		615	if (!enable_secure () && getenv ("LIBmethodS"))
		616	methods = atoi (getenv ("LIBmethodS"));
		617	else
		618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
321	#if HAVE_EPOLL	624	#if EV_USE_EPOLL
322	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
323	#endif	626	#endif
		627	#if EV_USEV_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		629	#endif
324	#if HAVE_SELECT	630	#if EV_USE_SELECT
325	if (ev_method == EVMETHOD_NONE) select_init (flags);	631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
326	#endif	632	#endif
327		633
328	if (ev_method)	634	if (method)
329	{	635	{
330	evw_init (&sigev, sigcb, 0);	636	ev_watcher_init (&sigev, sigcb);
		637	ev_set_priority (&sigev, EV_MAXPRI);
331	siginit ();	638	siginit (EV_A);
332	}
333		639
		640	#ifndef WIN32
		641	ev_signal_init (&childev, childcb, SIGCHLD);
		642	ev_set_priority (&childev, EV_MAXPRI);
		643	ev_signal_start (EV_A_ &childev);
		644	#endif
		645	}
		646	}
		647
334	return ev_method;	648	return method;
335	}	649	}
336		650
337	/*****************************************************************************/	651	/*****************************************************************************/
338		652
339	void ev_prefork (void)	653	void
		654	ev_fork_prepare (void)
340	{	655	{
341	/* nop */	656	/* nop */
342	}	657	}
343		658
		659	void
344	void ev_postfork_parent (void)	660	ev_fork_parent (void)
345	{	661	{
346	/* nop */	662	/* nop */
347	}	663	}
348		664
		665	void
349	void ev_postfork_child (void)	666	ev_fork_child (void)
350	{	667	{
351	#if HAVE_EPOLL	668	#if EV_USE_EPOLL
352	if (ev_method == EVMETHOD_EPOLL)	669	if (method == EVMETHOD_EPOLL)
353	epoll_postfork_child ();	670	epoll_postfork_child ();
354	#endif	671	#endif
355		672
356	evio_stop (&sigev);	673	ev_io_stop (&sigev);
357	close (sigpipe [0]);	674	close (sigpipe [0]);
358	close (sigpipe [1]);	675	close (sigpipe [1]);
359	pipe (sigpipe);	676	pipe (sigpipe);
360	siginit ();	677	siginit ();
361	}	678	}
362		679
363	/*****************************************************************************/	680	/*****************************************************************************/
364		681
365	static void	682	static void
366	fd_reify (void)	683	call_pending (EV_P)
367	{	684	{
368	int i;	685	int pri;
369		686
370	for (i = 0; i < fdchangecnt; ++i)	687	for (pri = NUMPRI; pri--; )
371	{	688	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	{	689	{
383	method_modify (fd, anfd->wev, wev);	690	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
384	anfd->wev = wev;
385	}
386	}
387		691
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)	692	if (p->w)
401	{	693	{
402	p->w->pending = 0;	694	p->w->pending = 0;
403	p->w->cb (p->w, p->events);	695	p->w->cb (EV_A_ p->w, p->events);
404	}	696	}
405	}	697	}
406
407	pendingcnt = 0;
408	}	698	}
409		699
410	static void	700	static void
411	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	701	timers_reify (EV_P)
412	{	702	{
413	while (timercnt && timers [0]->at <= now)	703	while (timercnt && timers [0]->at <= mn_now)
414	{	704	{
415	struct ev_timer *w = timers [0];	705	struct ev_timer *w = timers [0];
416		706
417	/* first reschedule or stop timer */	707	/* first reschedule or stop timer */
418	if (w->repeat)	708	if (w->repeat)
419	{	709	{
420	if (w->is_abs)	710	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;	711	w->at = mn_now + w->repeat;
424
425	assert (w->at > now);
426
427	downheap (timers, timercnt, 0);	712	downheap ((WT *)timers, timercnt, 0);
428	}	713	}
429	else	714	else
		715	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		716
		717	event ((W)w, EV_TIMEOUT);
		718	}
		719	}
		720
		721	static void
		722	periodics_reify (EV_P)
		723	{
		724	while (periodiccnt && periodics [0]->at <= rt_now)
		725	{
		726	struct ev_periodic *w = periodics [0];
		727
		728	/* first reschedule or stop timer */
		729	if (w->interval)
430	{	730	{
431	evtimer_stop (w); /* nonrepeating: stop timer */	731	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
432	--timercnt; /* maybe pass by reference instead? */	732	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		733	downheap ((WT *)periodics, periodiccnt, 0);
433	}	734	}
		735	else
		736	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
434		737
435	event ((W)w, EV_TIMEOUT);	738	event (EV_A_ (W)w, EV_PERIODIC);
436	}	739	}
437	}	740	}
438		741
439	static void	742	static void
440	time_update ()	743	periodics_reschedule (EV_P_ ev_tstamp diff)
441	{	744	{
442	int i;	745	int i;
443	ev_now = ev_time ();
444		746
445	if (have_monotonic)	747	/* adjust periodics after time jump */
		748	for (i = 0; i < periodiccnt; ++i)
446	{	749	{
447	ev_tstamp odiff = diff;	750	struct ev_periodic *w = periodics [i];
448		751
449	/* detecting time jumps is much more difficult */	752	if (w->interval)
450	for (i = 2; --i; ) /* loop a few times, before making important decisions */
451	{	753	{
452	now = get_clock ();	754	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
453	diff = ev_now - now;
454		755
455	if (fabs (odiff - diff) < MIN_TIMEJUMP)	756	if (fabs (diff) >= 1e-4)
456	return; /* all is well */	757	{
		758	ev_periodic_stop (EV_A_ w);
		759	ev_periodic_start (EV_A_ w);
457		760
458	ev_now = ev_time ();	761	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		762	}
459	}	763	}
		764	}
		765	}
460		766
461	/* time jump detected, reschedule atimers */	767	inline int
462	for (i = 0; i < atimercnt; ++i)	768	time_update_monotonic (EV_P)
		769	{
		770	mn_now = get_clock ();
		771
		772	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		773	{
		774	rt_now = mn_now + diff;
		775	return 0;
		776	}
		777	else
		778	{
		779	now_floor = mn_now;
		780	rt_now = ev_time ();
		781	return 1;
		782	}
		783	}
		784
		785	static void
		786	time_update (EV_P)
		787	{
		788	int i;
		789
		790	#if EV_USE_MONOTONIC
		791	if (expect_true (have_monotonic))
		792	{
		793	if (time_update_monotonic (EV_A))
463	{	794	{
464	struct ev_timer *w = atimers [i];	795	ev_tstamp odiff = diff;
465	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	796
		797	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		798	{
		799	diff = rt_now - mn_now;
		800
		801	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		802	return; /* all is well */
		803
		804	rt_now = ev_time ();
		805	mn_now = get_clock ();
		806	now_floor = mn_now;
		807	}
		808
		809	periodics_reschedule (EV_A_ diff - odiff);
		810	/* no timer adjustment, as the monotonic clock doesn't jump */
466	}	811	}
467	}	812	}
468	else	813	else
		814	#endif
469	{	815	{
470	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	816	rt_now = ev_time ();
471	/* time jump detected, adjust rtimers */	817
		818	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		819	{
		820	periodics_reschedule (EV_A_ rt_now - mn_now);
		821
		822	/* adjust timers. this is easy, as the offset is the same for all */
472	for (i = 0; i < rtimercnt; ++i)	823	for (i = 0; i < timercnt; ++i)
473	rtimers [i]->at += ev_now - now;	824	timers [i]->at += diff;
		825	}
474		826
475	now = ev_now;	827	mn_now = rt_now;
476	}	828	}
477	}	829	}
478		830
479	int ev_loop_done;	831	void
		832	ev_ref (EV_P)
		833	{
		834	++activecnt;
		835	}
480		836
		837	void
		838	ev_unref (EV_P)
		839	{
		840	--activecnt;
		841	}
		842
		843	static int loop_done;
		844
		845	void
481	void ev_loop (int flags)	846	ev_loop (EV_P_ int flags)
482	{	847	{
483	double block;	848	double block;
484	ev_loop_done = flags & EVLOOP_ONESHOT;	849	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		850
492	do	851	do
493	{	852	{
		853	/* queue check watchers (and execute them) */
		854	if (expect_false (preparecnt))
		855	{
		856	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		857	call_pending (EV_A);
		858	}
		859
494	/* update fd-related kernel structures */	860	/* update fd-related kernel structures */
495	fd_reify ();	861	fd_reify (EV_A);
496		862
497	/* calculate blocking time */	863	/* calculate blocking time */
		864
		865	/* we only need this for !monotonic clockor timers, but as we basically
		866	always have timers, we just calculate it always */
		867	#if EV_USE_MONOTONIC
		868	if (expect_true (have_monotonic))
		869	time_update_monotonic (EV_A);
		870	else
		871	#endif
		872	{
		873	rt_now = ev_time ();
		874	mn_now = rt_now;
		875	}
		876
498	if (flags & EVLOOP_NONBLOCK || idlecnt)	877	if (flags & EVLOOP_NONBLOCK || idlecnt)
499	block = 0.;	878	block = 0.;
500	else	879	else
501	{	880	{
502	block = MAX_BLOCKTIME;	881	block = MAX_BLOCKTIME;
503		882
504	if (rtimercnt)	883	if (timercnt)
505	{	884	{
506	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	885	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
507	if (block > to) block = to;	886	if (block > to) block = to;
508	}	887	}
509		888
510	if (atimercnt)	889	if (periodiccnt)
511	{	890	{
512	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	891	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
513	if (block > to) block = to;	892	if (block > to) block = to;
514	}	893	}
515		894
516	if (block < 0.) block = 0.;	895	if (block < 0.) block = 0.;
517	}	896	}
518		897
519	method_poll (block);	898	method_poll (EV_A_ block);
520		899
521	/* update ev_now, do magic */	900	/* update rt_now, do magic */
522	time_update ();	901	time_update (EV_A);
523		902
524	/* queue pending timers and reschedule them */	903	/* queue pending timers and reschedule them */
525	/* absolute timers first */	904	timers_reify (EV_A); /* relative timers called last */
526	timers_reify (atimers, atimercnt, ev_now);	905	periodics_reify (EV_A); /* absolute timers called first */
527	/* relative timers second */
528	timers_reify (rtimers, rtimercnt, now);
529		906
530	/* queue idle watchers unless io or timers are pending */	907	/* queue idle watchers unless io or timers are pending */
531	if (!pendingcnt)	908	if (!pendingcnt)
532	queue_events ((W *)idles, idlecnt, EV_IDLE);	909	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
533		910
534	/* queue check and possibly idle watchers */	911	/* queue check watchers, to be executed first */
		912	if (checkcnt)
535	queue_events ((W *)checks, checkcnt, EV_CHECK);	913	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
536		914
537	call_pending ();	915	call_pending (EV_A);
		916	printf ("activecnt %d\n", activecnt);//D
538	}	917	}
539	while (!ev_loop_done);	918	while (activecnt && !loop_done);
		919
		920	if (loop_done != 2)
		921	loop_done = 0;
		922	}
		923
		924	void
		925	ev_unloop (EV_P_ int how)
		926	{
		927	loop_done = how;
540	}	928	}
541		929
542	/*****************************************************************************/	930	/*****************************************************************************/
543		931
544	static void	932	inline void
545	wlist_add (WL *head, WL elem)	933	wlist_add (WL *head, WL elem)
546	{	934	{
547	elem->next = *head;	935	elem->next = *head;
548	*head = elem;	936	*head = elem;
549	}	937	}
550		938
551	static void	939	inline void
552	wlist_del (WL *head, WL elem)	940	wlist_del (WL *head, WL elem)
553	{	941	{
554	while (*head)	942	while (*head)
555	{	943	{
556	if (*head == elem)	944	if (*head == elem)
…		…
561		949
562	head = &(*head)->next;	950	head = &(*head)->next;
563	}	951	}
564	}	952	}
565		953
566	static void	954	inline void
		955	ev_clear_pending (EV_P_ W w)
		956	{
		957	if (w->pending)
		958	{
		959	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		960	w->pending = 0;
		961	}
		962	}
		963
		964	inline void
567	ev_start (W w, int active)	965	ev_start (EV_P_ W w, int active)
568	{	966	{
569	w->pending = 0;	967	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		968	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		969
570	w->active = active;	970	w->active = active;
		971	ev_ref (EV_A);
571	}	972	}
572		973
573	static void	974	inline void
574	ev_stop (W w)	975	ev_stop (EV_P_ W w)
575	{	976	{
576	if (w->pending)	977	ev_unref (EV_A);
577	pendings [w->pending - 1].w = 0;
578
579	w->active = 0;	978	w->active = 0;
580	}	979	}
581		980
582	/*****************************************************************************/	981	/*****************************************************************************/
583		982
584	void	983	void
585	evio_start (struct ev_io *w)	984	ev_io_start (EV_P_ struct ev_io *w)
586	{	985	{
		986	int fd = w->fd;
		987
587	if (ev_is_active (w))	988	if (ev_is_active (w))
588	return;	989	return;
589		990
590	int fd = w->fd;	991	assert (("ev_io_start called with negative fd", fd >= 0));
591		992
592	ev_start ((W)w, 1);	993	ev_start (EV_A_ (W)w, 1);
593	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	994	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
594	wlist_add ((WL *)&anfds[fd].head, (WL)w);	995	wlist_add ((WL *)&anfds[fd].head, (WL)w);
595		996
596	++fdchangecnt;	997	fd_change (EV_A_ fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = fd;
599	}	998	}
600		999
601	void	1000	void
602	evio_stop (struct ev_io *w)	1001	ev_io_stop (EV_P_ struct ev_io *w)
603	{	1002	{
		1003	ev_clear_pending (EV_A_ (W)w);
604	if (!ev_is_active (w))	1004	if (!ev_is_active (w))
605	return;	1005	return;
606		1006
607	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1007	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
608	ev_stop ((W)w);	1008	ev_stop (EV_A_ (W)w);
609		1009
610	++fdchangecnt;	1010	fd_change (EV_A_ w->fd);
611	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
612	fdchanges [fdchangecnt - 1] = w->fd;
613	}	1011	}
614		1012
615	void	1013	void
616	evtimer_start (struct ev_timer *w)	1014	ev_timer_start (EV_P_ struct ev_timer *w)
617	{	1015	{
618	if (ev_is_active (w))	1016	if (ev_is_active (w))
619	return;	1017	return;
620		1018
621	if (w->is_abs)	1019	w->at += mn_now;
		1020
		1021	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1022
		1023	ev_start (EV_A_ (W)w, ++timercnt);
		1024	array_needsize (timers, timermax, timercnt, );
		1025	timers [timercnt - 1] = w;
		1026	upheap ((WT *)timers, timercnt - 1);
		1027	}
		1028
		1029	void
		1030	ev_timer_stop (EV_P_ struct ev_timer *w)
		1031	{
		1032	ev_clear_pending (EV_A_ (W)w);
		1033	if (!ev_is_active (w))
		1034	return;
		1035
		1036	if (w->active < timercnt--)
		1037	{
		1038	timers [w->active - 1] = timers [timercnt];
		1039	downheap ((WT *)timers, timercnt, w->active - 1);
622	{	1040	}
623	/* this formula differs from the one in timer_reify becuse we do not round up */	1041
		1042	w->at = w->repeat;
		1043
		1044	ev_stop (EV_A_ (W)w);
		1045	}
		1046
		1047	void
		1048	ev_timer_again (EV_P_ struct ev_timer *w)
		1049	{
		1050	if (ev_is_active (w))
		1051	{
624	if (w->repeat)	1052	if (w->repeat)
625	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1053	{
626		1054	w->at = mn_now + w->repeat;
627	ev_start ((W)w, ++atimercnt);	1055	downheap ((WT *)timers, timercnt, w->active - 1);
628	array_needsize (atimers, atimermax, atimercnt, );	1056	}
629	atimers [atimercnt - 1] = w;
630	upheap (atimers, atimercnt - 1);
631	}
632	else	1057	else
		1058	ev_timer_stop (EV_A_ w);
633	{	1059	}
634	w->at += now;	1060	else if (w->repeat)
635		1061	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	}	1062	}
643		1063
644	void	1064	void
645	evtimer_stop (struct ev_timer *w)	1065	ev_periodic_start (EV_P_ struct ev_periodic *w)
646	{	1066	{
		1067	if (ev_is_active (w))
		1068	return;
		1069
		1070	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1071
		1072	/* this formula differs from the one in periodic_reify because we do not always round up */
		1073	if (w->interval)
		1074	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1075
		1076	ev_start (EV_A_ (W)w, ++periodiccnt);
		1077	array_needsize (periodics, periodicmax, periodiccnt, );
		1078	periodics [periodiccnt - 1] = w;
		1079	upheap ((WT *)periodics, periodiccnt - 1);
		1080	}
		1081
		1082	void
		1083	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1084	{
		1085	ev_clear_pending (EV_A_ (W)w);
647	if (!ev_is_active (w))	1086	if (!ev_is_active (w))
648	return;	1087	return;
649		1088
650	if (w->is_abs)
651	{
652	if (w->active < atimercnt--)	1089	if (w->active < periodiccnt--)
653	{
654	atimers [w->active - 1] = atimers [atimercnt];
655	downheap (atimers, atimercnt, w->active - 1);
656	}
657	}	1090	{
658	else	1091	periodics [w->active - 1] = periodics [periodiccnt];
		1092	downheap ((WT *)periodics, periodiccnt, w->active - 1);
659	{	1093	}
660	if (w->active < rtimercnt--)
661	{
662	rtimers [w->active - 1] = rtimers [rtimercnt];
663	downheap (rtimers, rtimercnt, w->active - 1);
664	}
665	}
666		1094
667	ev_stop ((W)w);	1095	ev_stop (EV_A_ (W)w);
668	}	1096	}
669		1097
		1098	#ifndef SA_RESTART
		1099	# define SA_RESTART 0
		1100	#endif
		1101
670	void	1102	void
671	evsignal_start (struct ev_signal *w)	1103	ev_signal_start (EV_P_ struct ev_signal *w)
672	{	1104	{
673	if (ev_is_active (w))	1105	if (ev_is_active (w))
674	return;	1106	return;
675		1107
		1108	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1109
676	ev_start ((W)w, 1);	1110	ev_start (EV_A_ (W)w, 1);
677	array_needsize (signals, signalmax, w->signum, signals_init);	1111	array_needsize (signals, signalmax, w->signum, signals_init);
678	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1112	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
679		1113
680	if (!w->next)	1114	if (!w->next)
681	{	1115	{
682	struct sigaction sa;	1116	struct sigaction sa;
683	sa.sa_handler = sighandler;	1117	sa.sa_handler = sighandler;
684	sigfillset (&sa.sa_mask);	1118	sigfillset (&sa.sa_mask);
685	sa.sa_flags = 0;	1119	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
686	sigaction (w->signum, &sa, 0);	1120	sigaction (w->signum, &sa, 0);
687	}	1121	}
688	}	1122	}
689		1123
690	void	1124	void
691	evsignal_stop (struct ev_signal *w)	1125	ev_signal_stop (EV_P_ struct ev_signal *w)
692	{	1126	{
		1127	ev_clear_pending (EV_A_ (W)w);
693	if (!ev_is_active (w))	1128	if (!ev_is_active (w))
694	return;	1129	return;
695		1130
696	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1131	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
697	ev_stop ((W)w);	1132	ev_stop (EV_A_ (W)w);
698		1133
699	if (!signals [w->signum - 1].head)	1134	if (!signals [w->signum - 1].head)
700	signal (w->signum, SIG_DFL);	1135	signal (w->signum, SIG_DFL);
701	}	1136	}
702		1137
		1138	void
703	void evidle_start (struct ev_idle *w)	1139	ev_idle_start (EV_P_ struct ev_idle *w)
704	{	1140	{
705	if (ev_is_active (w))	1141	if (ev_is_active (w))
706	return;	1142	return;
707		1143
708	ev_start ((W)w, ++idlecnt);	1144	ev_start (EV_A_ (W)w, ++idlecnt);
709	array_needsize (idles, idlemax, idlecnt, );	1145	array_needsize (idles, idlemax, idlecnt, );
710	idles [idlecnt - 1] = w;	1146	idles [idlecnt - 1] = w;
711	}	1147	}
712		1148
		1149	void
713	void evidle_stop (struct ev_idle *w)	1150	ev_idle_stop (EV_P_ struct ev_idle *w)
714	{	1151	{
		1152	ev_clear_pending (EV_A_ (W)w);
		1153	if (ev_is_active (w))
		1154	return;
		1155
715	idles [w->active - 1] = idles [--idlecnt];	1156	idles [w->active - 1] = idles [--idlecnt];
716	ev_stop ((W)w);	1157	ev_stop (EV_A_ (W)w);
717	}	1158	}
718		1159
719	void evcheck_start (struct ev_check *w)	1160	void
		1161	ev_prepare_start (EV_P_ struct ev_prepare *w)
720	{	1162	{
721	if (ev_is_active (w))	1163	if (ev_is_active (w))
722	return;	1164	return;
723		1165
		1166	ev_start (EV_A_ (W)w, ++preparecnt);
		1167	array_needsize (prepares, preparemax, preparecnt, );
		1168	prepares [preparecnt - 1] = w;
		1169	}
		1170
		1171	void
		1172	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1173	{
		1174	ev_clear_pending (EV_A_ (W)w);
		1175	if (ev_is_active (w))
		1176	return;
		1177
		1178	prepares [w->active - 1] = prepares [--preparecnt];
		1179	ev_stop (EV_A_ (W)w);
		1180	}
		1181
		1182	void
		1183	ev_check_start (EV_P_ struct ev_check *w)
		1184	{
		1185	if (ev_is_active (w))
		1186	return;
		1187
724	ev_start ((W)w, ++checkcnt);	1188	ev_start (EV_A_ (W)w, ++checkcnt);
725	array_needsize (checks, checkmax, checkcnt, );	1189	array_needsize (checks, checkmax, checkcnt, );
726	checks [checkcnt - 1] = w;	1190	checks [checkcnt - 1] = w;
727	}	1191	}
728		1192
		1193	void
729	void evcheck_stop (struct ev_check *w)	1194	ev_check_stop (EV_P_ struct ev_check *w)
730	{	1195	{
		1196	ev_clear_pending (EV_A_ (W)w);
		1197	if (ev_is_active (w))
		1198	return;
		1199
731	checks [w->active - 1] = checks [--checkcnt];	1200	checks [w->active - 1] = checks [--checkcnt];
732	ev_stop ((W)w);	1201	ev_stop (EV_A_ (W)w);
		1202	}
		1203
		1204	void
		1205	ev_child_start (EV_P_ struct ev_child *w)
		1206	{
		1207	if (ev_is_active (w))
		1208	return;
		1209
		1210	ev_start (EV_A_ (W)w, 1);
		1211	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1212	}
		1213
		1214	void
		1215	ev_child_stop (EV_P_ struct ev_child *w)
		1216	{
		1217	ev_clear_pending (EV_A_ (W)w);
		1218	if (ev_is_active (w))
		1219	return;
		1220
		1221	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1222	ev_stop (EV_A_ (W)w);
733	}	1223	}
734		1224
735	/*****************************************************************************/	1225	/*****************************************************************************/
736		1226
		1227	struct ev_once
		1228	{
		1229	struct ev_io io;
		1230	struct ev_timer to;
		1231	void (*cb)(int revents, void *arg);
		1232	void *arg;
		1233	};
		1234
		1235	static void
		1236	once_cb (EV_P_ struct ev_once *once, int revents)
		1237	{
		1238	void (*cb)(int revents, void *arg) = once->cb;
		1239	void *arg = once->arg;
		1240
		1241	ev_io_stop (EV_A_ &once->io);
		1242	ev_timer_stop (EV_A_ &once->to);
		1243	free (once);
		1244
		1245	cb (revents, arg);
		1246	}
		1247
		1248	static void
		1249	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1250	{
		1251	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1252	}
		1253
		1254	static void
		1255	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1256	{
		1257	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1258	}
		1259
		1260	void
		1261	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1262	{
		1263	struct ev_once *once = malloc (sizeof (struct ev_once));
		1264
		1265	if (!once)
		1266	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1267	else
		1268	{
		1269	once->cb = cb;
		1270	once->arg = arg;
		1271
		1272	ev_watcher_init (&once->io, once_cb_io);
		1273	if (fd >= 0)
		1274	{
		1275	ev_io_set (&once->io, fd, events);
		1276	ev_io_start (EV_A_ &once->io);
		1277	}
		1278
		1279	ev_watcher_init (&once->to, once_cb_to);
		1280	if (timeout >= 0.)
		1281	{
		1282	ev_timer_set (&once->to, timeout, 0.);
		1283	ev_timer_start (EV_A_ &once->to);
		1284	}
		1285	}
		1286	}
		1287
		1288	/*****************************************************************************/
		1289
737	#if 0	1290	#if 0
738		1291
		1292	struct ev_io wio;
		1293
739	static void	1294	static void
740	sin_cb (struct ev_io *w, int revents)	1295	sin_cb (struct ev_io *w, int revents)
741	{	1296	{
742	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1297	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
743	}	1298	}
744		1299
745	static void	1300	static void
746	ocb (struct ev_timer *w, int revents)	1301	ocb (struct ev_timer *w, int revents)
747	{	1302	{
748	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1303	//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);	1304	ev_timer_stop (w);
750	evtimer_start (w);	1305	ev_timer_start (w);
751	}	1306	}
752		1307
753	static void	1308	static void
754	scb (struct ev_signal *w, int revents)	1309	scb (struct ev_signal *w, int revents)
755	{	1310	{
756	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1311	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1312	ev_io_stop (&wio);
		1313	ev_io_start (&wio);
757	}	1314	}
758		1315
759	static void	1316	static void
760	gcb (struct ev_signal *w, int revents)	1317	gcb (struct ev_signal *w, int revents)
761	{	1318	{
762	fprintf (stderr, "generic %x\n", revents);	1319	fprintf (stderr, "generic %x\n", revents);
		1320
763	}	1321	}
764		1322
765	int main (void)	1323	int main (void)
766	{	1324	{
767	struct ev_io sin;
768
769	ev_init (0);	1325	ev_init (0);
770		1326
771	evw_init (&sin, sin_cb, 55);
772	evio_set (&sin, 0, EV_READ);	1327	ev_io_init (&wio, sin_cb, 0, EV_READ);
773	evio_start (&sin);	1328	ev_io_start (&wio);
774		1329
775	struct ev_timer t[10000];	1330	struct ev_timer t[10000];
776		1331
777	#if 0	1332	#if 0
778	int i;	1333	int i;
779	for (i = 0; i < 10000; ++i)	1334	for (i = 0; i < 10000; ++i)
780	{	1335	{
781	struct ev_timer *w = t + i;	1336	struct ev_timer *w = t + i;
782	evw_init (w, ocb, i);	1337	ev_watcher_init (w, ocb, i);
783	evtimer_set_abs (w, drand48 (), 0.99775533);	1338	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
784	evtimer_start (w);	1339	ev_timer_start (w);
785	if (drand48 () < 0.5)	1340	if (drand48 () < 0.5)
786	evtimer_stop (w);	1341	ev_timer_stop (w);
787	}	1342	}
788	#endif	1343	#endif
789		1344
790	struct ev_timer t1;	1345	struct ev_timer t1;
791	evw_init (&t1, ocb, 0);	1346	ev_timer_init (&t1, ocb, 5, 10);
792	evtimer_set_abs (&t1, 5, 10);
793	evtimer_start (&t1);	1347	ev_timer_start (&t1);
794		1348
795	struct ev_signal sig;	1349	struct ev_signal sig;
796	evw_init (&sig, scb, 65535);
797	evsignal_set (&sig, SIGQUIT);	1350	ev_signal_init (&sig, scb, SIGQUIT);
798	evsignal_start (&sig);	1351	ev_signal_start (&sig);
799		1352
800	struct ev_check cw;	1353	struct ev_check cw;
801	evw_init (&cw, gcb, 0);	1354	ev_check_init (&cw, gcb);
802	evcheck_start (&cw);	1355	ev_check_start (&cw);
803		1356
804	struct ev_idle iw;	1357	struct ev_idle iw;
805	evw_init (&iw, gcb, 0);	1358	ev_idle_init (&iw, gcb);
806	evidle_start (&iw);	1359	ev_idle_start (&iw);
807		1360
808	ev_loop (0);	1361	ev_loop (0);
809		1362
810	return 0;	1363	return 0;
811	}	1364	}

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