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Comparing libev/ev.c (file contents):
Revision 1.12 by root, Wed Oct 31 09:23:17 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 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
14	#define HAVE_EPOLL 1	53	/**/
15		54
16	#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
17	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
18	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
19	# endif	84	#endif
20	#endif
21		85
22	#ifndef HAVE_SELECT
23	# define HAVE_SELECT 1
24	#endif
25
26	#ifndef HAVE_EPOLL
27	# define HAVE_EPOLL 0
28	#endif
29
30	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
31	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
32	#endif	89	#endif
		90
		91	/**/
33		92
34	#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) */
35	#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 */
36		97
37	#include "ev.h"	98	#include "ev.h"
38		99
39	struct ev_watcher {	100	#if __GNUC__ >= 3
40	EV_WATCHER (ev_watcher);	101	# define expect(expr,value) __builtin_expect ((expr),(value))
41	};	102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
42		107
43	struct ev_watcher_list {	108	#define expect_false(expr) expect ((expr) != 0, 0)
44	EV_WATCHER_LIST (ev_watcher_list);	109	#define expect_true(expr) expect ((expr) != 0, 1)
45	};
46		110
47	struct ev_watcher_time {	111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
48	EV_WATCHER_TIME (ev_watcher_time);	112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
49	};
50		113
51	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
52	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
53	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
54		117
55	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
56	ev_tstamp ev_now;
57	int ev_method;
58
59	static int have_monotonic; /* runtime */
60
61	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
62	static void (*method_modify)(int fd, int oev, int nev);
63	static void (*method_poll)(ev_tstamp timeout);
64		119
65	/*****************************************************************************/	120	/*****************************************************************************/
66		121
67	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	#if 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
68	ev_time (void)	156	ev_time (void)
69	{	157	{
70	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
71	struct timespec ts;	159	struct timespec ts;
72	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
73	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
74	#else	162	#else
75	struct timeval tv;	163	struct timeval tv;
76	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
77	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
78	#endif	166	#endif
79	}	167	}
80		168
81	static ev_tstamp	169	inline ev_tstamp
82	get_clock (void)	170	get_clock (void)
83	{	171	{
84	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
85	if (have_monotonic)	173	if (expect_true (have_monotonic))
86	{	174	{
87	struct timespec ts;	175	struct timespec ts;
88	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	}	178	}
91	#endif	179	#endif
92		180
93	return ev_time ();	181	return ev_time ();
94	}	182	}
95		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
96	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
97	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
98	{ \	194	{ \
99	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
100	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	\
101	base = realloc (base, sizeof (*base) * (newcnt)); \	202	base = realloc (base, sizeof (*base) * (newcnt)); \
102	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
103	cur = newcnt; \	204	cur = newcnt; \
104	}	205	}
105		206
106	/*****************************************************************************/	207	/*****************************************************************************/
107		208
108	typedef struct
109	{
110	struct ev_io *head;
111	unsigned char wev, rev; /* want, received event set */
112	} ANFD;
113
114	static ANFD *anfds;
115	static int anfdmax;
116
117	static int *fdchanges;
118	static int fdchangemax, fdchangecnt;
119
120	static void	209	static void
121	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
122	{	211	{
123	while (count--)	212	while (count--)
124	{	213	{
125	base->head = 0;	214	base->head = 0;
126	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
127	++base;	218	++base;
128	}	219	}
129	}	220	}
130		221
131	typedef struct
132	{
133	W w;
134	int events;
135	} ANPENDING;
136
137	static ANPENDING *pendings;
138	static int pendingmax, pendingcnt;
139
140	static void	222	static void
141	event (W w, int events)	223	event (EV_P_ W w, int events)
142	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
		229	}
		230
143	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
144	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
145	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
146	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
147	}	235	}
148		236
149	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
150	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
151	{	248	{
152	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
153	struct ev_io *w;	250	struct ev_io *w;
154		251
155	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
156	{	253	{
157	int ev = w->events & events;	254	int ev = w->events & events;
158		255
159	if (ev)	256	if (ev)
160	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
161	}	258	}
162	}	259	}
163		260
		261	/*****************************************************************************/
		262
164	static void	263	static void
165	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
166	{	265	{
167	int i;	266	int i;
168		267
169	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
170	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	}
171	}	341	}
172		342
173	/*****************************************************************************/	343	/*****************************************************************************/
174		344
175	static struct ev_timer **timers;
176	static int timermax, timercnt;
177
178	static struct ev_periodic **periodics;
179	static int periodicmax, periodiccnt;
180
181	static void	345	static void
182	upheap (WT *timers, int k)	346	upheap (WT *heap, int k)
183	{	347	{
184	WT w = timers [k];	348	WT w = heap [k];
185		349
186	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
187	{	351	{
188	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
189	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
190	k >>= 1;	354	k >>= 1;
191	}	355	}
192		356
193	timers [k] = w;	357	heap [k] = w;
194	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
195		359
196	}	360	}
197		361
198	static void	362	static void
199	downheap (WT *timers, int N, int k)	363	downheap (WT *heap, int N, int k)
200	{	364	{
201	WT w = timers [k];	365	WT w = heap [k];
202		366
203	while (k < (N >> 1))	367	while (k < (N >> 1))
204	{	368	{
205	int j = k << 1;	369	int j = k << 1;
206		370
207	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
208	++j;	372	++j;
209		373
210	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
211	break;	375	break;
212		376
213	timers [k] = timers [j];	377	heap [k] = heap [j];
214	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
215	k = j;	379	k = j;
216	}	380	}
217		381
218	timers [k] = w;	382	heap [k] = w;
219	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
220	}	384	}
221		385
222	/*****************************************************************************/	386	/*****************************************************************************/
223		387
224	typedef struct	388	typedef struct
225	{	389	{
226	struct ev_signal *head;	390	struct ev_watcher_list *head;
227	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
228	} ANSIG;	392	} ANSIG;
229		393
230	static ANSIG *signals;	394	static ANSIG *signals;
231	static int signalmax;	395	static int signalmax;
232		396
233	static int sigpipe [2];	397	static int sigpipe [2];
234	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
235	static struct ev_io sigev;
236		399
237	static void	400	static void
238	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
239	{	402	{
240	while (count--)	403	while (count--)
241	{	404	{
242	base->head = 0;	405	base->head = 0;
243	base->gotsig = 0;	406	base->gotsig = 0;
		407
244	++base;	408	++base;
245	}	409	}
246	}	410	}
247		411
248	static void	412	static void
…		…
250	{	414	{
251	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
252		416
253	if (!gotsig)	417	if (!gotsig)
254	{	418	{
		419	int old_errno = errno;
255	gotsig = 1;	420	gotsig = 1;
256	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
257	}	423	}
258	}	424	}
259		425
260	static void	426	static void
261	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
262	{	428	{
263	struct ev_signal *w;	429	struct ev_watcher_list *w;
264	int sig;	430	int signum;
265		431
		432	read (sigpipe [0], &revents, 1);
266	gotsig = 0;	433	gotsig = 0;
267	read (sigpipe [0], &revents, 1);
268		434
269	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
270	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
271	{	437	{
272	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
273		439
274	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
275	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
276	}	442	}
277	}	443	}
278		444
279	static void	445	static void
280	siginit (void)	446	siginit (EV_P)
281	{	447	{
		448	#ifndef WIN32
282	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
283	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
284		451
285	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
286	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
287	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
288		456
289	evio_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
290	evio_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
291	}	460	}
292		461
293	/*****************************************************************************/	462	/*****************************************************************************/
294		463
295	static struct ev_idle **idles;	464	#ifndef WIN32
296	static int idlemax, idlecnt;
297		465
298	static struct ev_check **checks;	466	#ifndef WCONTINUED
299	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
300		501
301	/*****************************************************************************/	502	/*****************************************************************************/
302		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
303	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
304	# include "ev_epoll.c"	508	# include "ev_epoll.c"
305	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
306	#if HAVE_SELECT	513	#if EV_USE_SELECT
307	# include "ev_select.c"	514	# include "ev_select.c"
308	#endif	515	#endif
309		516
310	int ev_init (int flags)	517	int
		518	ev_version_major (void)
311	{	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	inline int
		548	loop_init (EV_P_ int methods)
		549	{
		550	if (!method)
		551	{
312	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
313	{	553	{
314	struct timespec ts;	554	struct timespec ts;
315	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
316	have_monotonic = 1;	556	have_monotonic = 1;
317	}	557	}
318	#endif	558	#endif
319		559
320	ev_now = ev_time ();	560	rt_now = ev_time ();
321	now = get_clock ();	561	mn_now = get_clock ();
322	diff = ev_now - now;	562	now_floor = mn_now;
		563	rtmn_diff = rt_now - mn_now;
323		564
324	if (pipe (sigpipe))	565	if (pipe (sigpipe))
		566	return 0;
		567
		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
		578	#if EV_USE_EPOLL
		579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
		584	#if EV_USE_SELECT
		585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		586	#endif
		587
		588	if (method)
		589	{
		590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
		592	siginit (EV_A);
		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
		603	return method;
		604	}
		605
		606	#if 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	if (loop_init (EV_A_ methods))
		614	return loop;
		615
		616	ev_loop_delete (loop);
		617
325	return 0;	618	return 0;
326
327	ev_method = EVMETHOD_NONE;
328	#if HAVE_EPOLL
329	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
330	#endif
331	#if HAVE_SELECT
332	if (ev_method == EVMETHOD_NONE) select_init (flags);
333	#endif
334
335	if (ev_method)
336	{
337	evw_init (&sigev, sigcb);
338	siginit ();
339	}
340
341	return ev_method;
342	}	619	}
		620
		621	void
		622	ev_loop_delete (EV_P)
		623	{
		624	/*TODO*/
		625	free (loop);
		626	}
		627
		628	#else
		629
		630	int
		631	ev_init (int methods)
		632	{
		633	return loop_init (methods);
		634	}
		635
		636	#endif
343		637
344	/*****************************************************************************/	638	/*****************************************************************************/
345		639
346	void ev_prefork (void)	640	void
		641	ev_fork_prepare (void)
347	{	642	{
348	/* nop */	643	/* nop */
349	}	644	}
350		645
		646	void
351	void ev_postfork_parent (void)	647	ev_fork_parent (void)
352	{	648	{
353	/* nop */	649	/* nop */
354	}	650	}
355		651
		652	void
356	void ev_postfork_child (void)	653	ev_fork_child (void)
357	{	654	{
		655	/*TODO*/
		656	#if !EV_MULTIPLICITY
358	#if HAVE_EPOLL	657	#if EV_USE_EPOLL
359	if (ev_method == EVMETHOD_EPOLL)	658	if (method == EVMETHOD_EPOLL)
360	epoll_postfork_child ();	659	epoll_postfork_child (EV_A);
361	#endif	660	#endif
362		661
363	evio_stop (&sigev);	662	ev_io_stop (EV_A_ &sigev);
364	close (sigpipe [0]);	663	close (sigpipe [0]);
365	close (sigpipe [1]);	664	close (sigpipe [1]);
366	pipe (sigpipe);	665	pipe (sigpipe);
367	siginit ();	666	siginit (EV_A);
		667	#endif
368	}	668	}
369		669
370	/*****************************************************************************/	670	/*****************************************************************************/
371		671
372	static void	672	static void
373	fd_reify (void)	673	call_pending (EV_P)
374	{	674	{
375	int i;	675	int pri;
376		676
377	for (i = 0; i < fdchangecnt; ++i)	677	for (pri = NUMPRI; pri--; )
378	{	678	while (pendingcnt [pri])
379	int fd = fdchanges [i];
380	ANFD *anfd = anfds + fd;
381	struct ev_io *w;
382
383	int wev = 0;
384
385	for (w = anfd->head; w; w = w->next)
386	wev |= w->events;
387
388	if (anfd->wev != wev)
389	{	679	{
390	method_modify (fd, anfd->wev, wev);	680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
391	anfd->wev = wev;
392	}
393	}
394		681
395	fdchangecnt = 0;
396	}
397
398	static void
399	call_pending ()
400	{
401	int i;
402
403	for (i = 0; i < pendingcnt; ++i)
404	{
405	ANPENDING *p = pendings + i;
406
407	if (p->w)	682	if (p->w)
408	{	683	{
409	p->w->pending = 0;	684	p->w->pending = 0;
410	p->w->cb (p->w, p->events);	685	p->w->cb (EV_A_ p->w, p->events);
411	}	686	}
412	}	687	}
413
414	pendingcnt = 0;
415	}	688	}
416		689
417	static void	690	static void
418	timers_reify ()	691	timers_reify (EV_P)
419	{	692	{
420	while (timercnt && timers [0]->at <= now)	693	while (timercnt && timers [0]->at <= mn_now)
421	{	694	{
422	struct ev_timer *w = timers [0];	695	struct ev_timer *w = timers [0];
423		696
424	/* first reschedule or stop timer */	697	/* first reschedule or stop timer */
425	if (w->repeat)	698	if (w->repeat)
426	{	699	{
		700	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
427	w->at = now + w->repeat;	701	w->at = mn_now + w->repeat;
428	assert (("timer timeout in the past, negative repeat?", w->at > now));
429	downheap ((WT *)timers, timercnt, 0);	702	downheap ((WT *)timers, timercnt, 0);
430	}	703	}
431	else	704	else
432	evtimer_stop (w); /* nonrepeating: stop timer */	705	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
433		706
434	event ((W)w, EV_TIMEOUT);	707	event (EV_A_ (W)w, EV_TIMEOUT);
435	}	708	}
436	}	709	}
437		710
438	static void	711	static void
439	periodics_reify ()	712	periodics_reify (EV_P)
440	{	713	{
441	while (periodiccnt && periodics [0]->at <= ev_now)	714	while (periodiccnt && periodics [0]->at <= rt_now)
442	{	715	{
443	struct ev_periodic *w = periodics [0];	716	struct ev_periodic *w = periodics [0];
444		717
445	/* first reschedule or stop timer */	718	/* first reschedule or stop timer */
446	if (w->interval)	719	if (w->interval)
447	{	720	{
448	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	721	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
449	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	722	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
450	downheap ((WT *)periodics, periodiccnt, 0);	723	downheap ((WT *)periodics, periodiccnt, 0);
451	}	724	}
452	else	725	else
453	evperiodic_stop (w); /* nonrepeating: stop timer */	726	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
454		727
455	event ((W)w, EV_TIMEOUT);	728	event (EV_A_ (W)w, EV_PERIODIC);
456	}	729	}
457	}	730	}
458		731
459	static void	732	static void
460	time_jump (ev_tstamp diff)	733	periodics_reschedule (EV_P)
461	{	734	{
462	int i;	735	int i;
463		736
464	/* adjust periodics */	737	/* adjust periodics after time jump */
465	for (i = 0; i < periodiccnt; ++i)	738	for (i = 0; i < periodiccnt; ++i)
466	{	739	{
467	struct ev_periodic *w = periodics [i];	740	struct ev_periodic *w = periodics [i];
468		741
469	if (w->interval)	742	if (w->interval)
470	{	743	{
471	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	744	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
472		745
473	if (fabs (diff) >= 1e-4)	746	if (fabs (diff) >= 1e-4)
474	{	747	{
475	evperiodic_stop (w);	748	ev_periodic_stop (EV_A_ w);
476	evperiodic_start (w);	749	ev_periodic_start (EV_A_ w);
477		750
478	i = 0; /* restart loop, inefficient, but time jumps should be rare */	751	i = 0; /* restart loop, inefficient, but time jumps should be rare */
479	}	752	}
480	}	753	}
481	}	754	}
482
483	/* adjust timers. this is easy, as the offset is the same for all */
484	for (i = 0; i < timercnt; ++i)
485	timers [i]->at += diff;
486	}	755	}
487		756
		757	inline int
		758	time_update_monotonic (EV_P)
		759	{
		760	mn_now = get_clock ();
		761
		762	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		763	{
		764	rt_now = rtmn_diff + mn_now;
		765	return 0;
		766	}
		767	else
		768	{
		769	now_floor = mn_now;
		770	rt_now = ev_time ();
		771	return 1;
		772	}
		773	}
		774
488	static void	775	static void
489	time_update ()	776	time_update (EV_P)
490	{	777	{
491	int i;	778	int i;
492		779
493	ev_now = ev_time ();	780	#if EV_USE_MONOTONIC
494
495	if (have_monotonic)	781	if (expect_true (have_monotonic))
496	{	782	{
497	ev_tstamp odiff = diff;	783	if (time_update_monotonic (EV_A))
498
499	for (i = 4; --i; ) /* loop a few times, before making important decisions */
500	{	784	{
501	now = get_clock ();	785	ev_tstamp odiff = rtmn_diff;
		786
		787	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		788	{
502	diff = ev_now - now;	789	rtmn_diff = rt_now - mn_now;
503		790
504	if (fabs (odiff - diff) < MIN_TIMEJUMP)	791	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
505	return; /* all is well */	792	return; /* all is well */
506		793
507	ev_now = ev_time ();	794	rt_now = ev_time ();
		795	mn_now = get_clock ();
		796	now_floor = mn_now;
		797	}
		798
		799	periodics_reschedule (EV_A);
		800	/* no timer adjustment, as the monotonic clock doesn't jump */
		801	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
508	}	802	}
509
510	time_jump (diff - odiff);
511	}	803	}
512	else	804	else
		805	#endif
513	{	806	{
514	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	807	rt_now = ev_time ();
515	time_jump (ev_now - now);
516		808
		809	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		810	{
		811	periodics_reschedule (EV_A);
		812
		813	/* adjust timers. this is easy, as the offset is the same for all */
		814	for (i = 0; i < timercnt; ++i)
		815	timers [i]->at += rt_now - mn_now;
		816	}
		817
517	now = ev_now;	818	mn_now = rt_now;
518	}	819	}
519	}	820	}
520		821
521	int ev_loop_done;	822	void
		823	ev_ref (EV_P)
		824	{
		825	++activecnt;
		826	}
522		827
		828	void
		829	ev_unref (EV_P)
		830	{
		831	--activecnt;
		832	}
		833
		834	static int loop_done;
		835
		836	void
523	void ev_loop (int flags)	837	ev_loop (EV_P_ int flags)
524	{	838	{
525	double block;	839	double block;
526	ev_loop_done = flags & EVLOOP_ONESHOT;	840	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
527
528	if (checkcnt)
529	{
530	queue_events ((W *)checks, checkcnt, EV_CHECK);
531	call_pending ();
532	}
533		841
534	do	842	do
535	{	843	{
		844	/* queue check watchers (and execute them) */
		845	if (expect_false (preparecnt))
		846	{
		847	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		848	call_pending (EV_A);
		849	}
		850
536	/* update fd-related kernel structures */	851	/* update fd-related kernel structures */
537	fd_reify ();	852	fd_reify (EV_A);
538		853
539	/* calculate blocking time */	854	/* calculate blocking time */
540		855
541	/* we only need this for !monotonic clock, but as we always have timers, we just calculate it every time */	856	/* we only need this for !monotonic clockor timers, but as we basically
		857	always have timers, we just calculate it always */
		858	#if EV_USE_MONOTONIC
		859	if (expect_true (have_monotonic))
		860	time_update_monotonic (EV_A);
		861	else
		862	#endif
		863	{
542	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = rt_now;
		866	}
543		867
544	if (flags & EVLOOP_NONBLOCK || idlecnt)	868	if (flags & EVLOOP_NONBLOCK || idlecnt)
545	block = 0.;	869	block = 0.;
546	else	870	else
547	{	871	{
548	block = MAX_BLOCKTIME;	872	block = MAX_BLOCKTIME;
549		873
550	if (timercnt)	874	if (timercnt)
551	{	875	{
552	ev_tstamp to = timers [0]->at - get_clock () + method_fudge;	876	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
553	if (block > to) block = to;	877	if (block > to) block = to;
554	}	878	}
555		879
556	if (periodiccnt)	880	if (periodiccnt)
557	{	881	{
558	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	882	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
559	if (block > to) block = to;	883	if (block > to) block = to;
560	}	884	}
561		885
562	if (block < 0.) block = 0.;	886	if (block < 0.) block = 0.;
563	}	887	}
564		888
565	method_poll (block);	889	method_poll (EV_A_ block);
566		890
567	/* update ev_now, do magic */	891	/* update rt_now, do magic */
568	time_update ();	892	time_update (EV_A);
569		893
570	/* queue pending timers and reschedule them */	894	/* queue pending timers and reschedule them */
		895	timers_reify (EV_A); /* relative timers called last */
571	periodics_reify (); /* absolute timers first */	896	periodics_reify (EV_A); /* absolute timers called first */
572	timers_reify (); /* relative timers second */
573		897
574	/* queue idle watchers unless io or timers are pending */	898	/* queue idle watchers unless io or timers are pending */
575	if (!pendingcnt)	899	if (!pendingcnt)
576	queue_events ((W *)idles, idlecnt, EV_IDLE);	900	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
577		901
578	/* queue check and possibly idle watchers */	902	/* queue check watchers, to be executed first */
		903	if (checkcnt)
579	queue_events ((W *)checks, checkcnt, EV_CHECK);	904	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
580		905
581	call_pending ();	906	call_pending (EV_A);
582	}	907	}
583	while (!ev_loop_done);	908	while (activecnt && !loop_done);
		909
		910	if (loop_done != 2)
		911	loop_done = 0;
		912	}
		913
		914	void
		915	ev_unloop (EV_P_ int how)
		916	{
		917	loop_done = how;
584	}	918	}
585		919
586	/*****************************************************************************/	920	/*****************************************************************************/
587		921
588	static void	922	inline void
589	wlist_add (WL *head, WL elem)	923	wlist_add (WL *head, WL elem)
590	{	924	{
591	elem->next = *head;	925	elem->next = *head;
592	*head = elem;	926	*head = elem;
593	}	927	}
594		928
595	static void	929	inline void
596	wlist_del (WL *head, WL elem)	930	wlist_del (WL *head, WL elem)
597	{	931	{
598	while (*head)	932	while (*head)
599	{	933	{
600	if (*head == elem)	934	if (*head == elem)
…		…
605		939
606	head = &(*head)->next;	940	head = &(*head)->next;
607	}	941	}
608	}	942	}
609		943
610	static void	944	inline void
		945	ev_clear_pending (EV_P_ W w)
		946	{
		947	if (w->pending)
		948	{
		949	pendings [ABSPRI (w)][w->pending - 1].w = 0;
		950	w->pending = 0;
		951	}
		952	}
		953
		954	inline void
611	ev_start (W w, int active)	955	ev_start (EV_P_ W w, int active)
612	{	956	{
613	w->pending = 0;	957	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		958	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		959
614	w->active = active;	960	w->active = active;
		961	ev_ref (EV_A);
615	}	962	}
616		963
617	static void	964	inline void
618	ev_stop (W w)	965	ev_stop (EV_P_ W w)
619	{	966	{
620	if (w->pending)	967	ev_unref (EV_A);
621	pendings [w->pending - 1].w = 0;
622
623	w->active = 0;	968	w->active = 0;
624	}	969	}
625		970
626	/*****************************************************************************/	971	/*****************************************************************************/
627		972
628	void	973	void
629	evio_start (struct ev_io *w)	974	ev_io_start (EV_P_ struct ev_io *w)
630	{	975	{
		976	int fd = w->fd;
		977
631	if (ev_is_active (w))	978	if (ev_is_active (w))
632	return;	979	return;
633		980
634	int fd = w->fd;	981	assert (("ev_io_start called with negative fd", fd >= 0));
635		982
636	ev_start ((W)w, 1);	983	ev_start (EV_A_ (W)w, 1);
637	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	984	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
638	wlist_add ((WL *)&anfds[fd].head, (WL)w);	985	wlist_add ((WL *)&anfds[fd].head, (WL)w);
639		986
640	++fdchangecnt;	987	fd_change (EV_A_ fd);
641	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
642	fdchanges [fdchangecnt - 1] = fd;
643	}	988	}
644		989
645	void	990	void
646	evio_stop (struct ev_io *w)	991	ev_io_stop (EV_P_ struct ev_io *w)
647	{	992	{
		993	ev_clear_pending (EV_A_ (W)w);
648	if (!ev_is_active (w))	994	if (!ev_is_active (w))
649	return;	995	return;
650		996
651	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	997	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
652	ev_stop ((W)w);	998	ev_stop (EV_A_ (W)w);
653		999
654	++fdchangecnt;	1000	fd_change (EV_A_ w->fd);
655	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
656	fdchanges [fdchangecnt - 1] = w->fd;
657	}	1001	}
658		1002
659
660	void	1003	void
661	evtimer_start (struct ev_timer *w)	1004	ev_timer_start (EV_P_ struct ev_timer *w)
662	{	1005	{
663	if (ev_is_active (w))	1006	if (ev_is_active (w))
664	return;	1007	return;
665		1008
666	w->at += now;	1009	w->at += mn_now;
667		1010
		1011	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1012
668	ev_start ((W)w, ++timercnt);	1013	ev_start (EV_A_ (W)w, ++timercnt);
669	array_needsize (timers, timermax, timercnt, );	1014	array_needsize (timers, timermax, timercnt, );
670	timers [timercnt - 1] = w;	1015	timers [timercnt - 1] = w;
671	upheap ((WT *)timers, timercnt - 1);	1016	upheap ((WT *)timers, timercnt - 1);
672	}	1017	}
673		1018
674	void	1019	void
675	evtimer_stop (struct ev_timer *w)	1020	ev_timer_stop (EV_P_ struct ev_timer *w)
676	{	1021	{
		1022	ev_clear_pending (EV_A_ (W)w);
677	if (!ev_is_active (w))	1023	if (!ev_is_active (w))
678	return;	1024	return;
679		1025
680	if (w->active < timercnt--)	1026	if (w->active < timercnt--)
681	{	1027	{
682	timers [w->active - 1] = timers [timercnt];	1028	timers [w->active - 1] = timers [timercnt];
683	downheap ((WT *)timers, timercnt, w->active - 1);	1029	downheap ((WT *)timers, timercnt, w->active - 1);
684	}	1030	}
685		1031
		1032	w->at = w->repeat;
		1033
686	ev_stop ((W)w);	1034	ev_stop (EV_A_ (W)w);
687	}	1035	}
688		1036
689	void	1037	void
690	evperiodic_start (struct ev_periodic *w)	1038	ev_timer_again (EV_P_ struct ev_timer *w)
691	{	1039	{
692	if (ev_is_active (w))	1040	if (ev_is_active (w))
		1041	{
		1042	if (w->repeat)
		1043	{
		1044	w->at = mn_now + w->repeat;
		1045	downheap ((WT *)timers, timercnt, w->active - 1);
		1046	}
		1047	else
		1048	ev_timer_stop (EV_A_ w);
		1049	}
		1050	else if (w->repeat)
		1051	ev_timer_start (EV_A_ w);
		1052	}
		1053
		1054	void
		1055	ev_periodic_start (EV_P_ struct ev_periodic *w)
		1056	{
		1057	if (ev_is_active (w))
693	return;	1058	return;
		1059
		1060	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
694		1061
695	/* this formula differs from the one in periodic_reify because we do not always round up */	1062	/* this formula differs from the one in periodic_reify because we do not always round up */
696	if (w->interval)	1063	if (w->interval)
697	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1064	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
698		1065
699	ev_start ((W)w, ++periodiccnt);	1066	ev_start (EV_A_ (W)w, ++periodiccnt);
700	array_needsize (periodics, periodicmax, periodiccnt, );	1067	array_needsize (periodics, periodicmax, periodiccnt, );
701	periodics [periodiccnt - 1] = w;	1068	periodics [periodiccnt - 1] = w;
702	upheap ((WT *)periodics, periodiccnt - 1);	1069	upheap ((WT *)periodics, periodiccnt - 1);
703	}	1070	}
704		1071
705	void	1072	void
706	evperiodic_stop (struct ev_periodic *w)	1073	ev_periodic_stop (EV_P_ struct ev_periodic *w)
707	{	1074	{
		1075	ev_clear_pending (EV_A_ (W)w);
708	if (!ev_is_active (w))	1076	if (!ev_is_active (w))
709	return;	1077	return;
710		1078
711	if (w->active < periodiccnt--)	1079	if (w->active < periodiccnt--)
712	{	1080	{
713	periodics [w->active - 1] = periodics [periodiccnt];	1081	periodics [w->active - 1] = periodics [periodiccnt];
714	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1082	downheap ((WT *)periodics, periodiccnt, w->active - 1);
715	}	1083	}
716		1084
717	ev_stop ((W)w);	1085	ev_stop (EV_A_ (W)w);
718	}	1086	}
719		1087
		1088	#ifndef SA_RESTART
		1089	# define SA_RESTART 0
		1090	#endif
		1091
720	void	1092	void
721	evsignal_start (struct ev_signal *w)	1093	ev_signal_start (EV_P_ struct ev_signal *w)
722	{	1094	{
723	if (ev_is_active (w))	1095	if (ev_is_active (w))
724	return;	1096	return;
725		1097
		1098	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1099
726	ev_start ((W)w, 1);	1100	ev_start (EV_A_ (W)w, 1);
727	array_needsize (signals, signalmax, w->signum, signals_init);	1101	array_needsize (signals, signalmax, w->signum, signals_init);
728	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1102	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
729		1103
730	if (!w->next)	1104	if (!w->next)
731	{	1105	{
732	struct sigaction sa;	1106	struct sigaction sa;
733	sa.sa_handler = sighandler;	1107	sa.sa_handler = sighandler;
734	sigfillset (&sa.sa_mask);	1108	sigfillset (&sa.sa_mask);
735	sa.sa_flags = 0;	1109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
736	sigaction (w->signum, &sa, 0);	1110	sigaction (w->signum, &sa, 0);
737	}	1111	}
738	}	1112	}
739		1113
740	void	1114	void
741	evsignal_stop (struct ev_signal *w)	1115	ev_signal_stop (EV_P_ struct ev_signal *w)
742	{	1116	{
		1117	ev_clear_pending (EV_A_ (W)w);
743	if (!ev_is_active (w))	1118	if (!ev_is_active (w))
744	return;	1119	return;
745		1120
746	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1121	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
747	ev_stop ((W)w);	1122	ev_stop (EV_A_ (W)w);
748		1123
749	if (!signals [w->signum - 1].head)	1124	if (!signals [w->signum - 1].head)
750	signal (w->signum, SIG_DFL);	1125	signal (w->signum, SIG_DFL);
751	}	1126	}
752		1127
		1128	void
753	void evidle_start (struct ev_idle *w)	1129	ev_idle_start (EV_P_ struct ev_idle *w)
754	{	1130	{
755	if (ev_is_active (w))	1131	if (ev_is_active (w))
756	return;	1132	return;
757		1133
758	ev_start ((W)w, ++idlecnt);	1134	ev_start (EV_A_ (W)w, ++idlecnt);
759	array_needsize (idles, idlemax, idlecnt, );	1135	array_needsize (idles, idlemax, idlecnt, );
760	idles [idlecnt - 1] = w;	1136	idles [idlecnt - 1] = w;
761	}	1137	}
762		1138
		1139	void
763	void evidle_stop (struct ev_idle *w)	1140	ev_idle_stop (EV_P_ struct ev_idle *w)
764	{	1141	{
		1142	ev_clear_pending (EV_A_ (W)w);
		1143	if (ev_is_active (w))
		1144	return;
		1145
765	idles [w->active - 1] = idles [--idlecnt];	1146	idles [w->active - 1] = idles [--idlecnt];
766	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
767	}	1148	}
768		1149
769	void evcheck_start (struct ev_check *w)	1150	void
		1151	ev_prepare_start (EV_P_ struct ev_prepare *w)
770	{	1152	{
771	if (ev_is_active (w))	1153	if (ev_is_active (w))
772	return;	1154	return;
773		1155
		1156	ev_start (EV_A_ (W)w, ++preparecnt);
		1157	array_needsize (prepares, preparemax, preparecnt, );
		1158	prepares [preparecnt - 1] = w;
		1159	}
		1160
		1161	void
		1162	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1163	{
		1164	ev_clear_pending (EV_A_ (W)w);
		1165	if (ev_is_active (w))
		1166	return;
		1167
		1168	prepares [w->active - 1] = prepares [--preparecnt];
		1169	ev_stop (EV_A_ (W)w);
		1170	}
		1171
		1172	void
		1173	ev_check_start (EV_P_ struct ev_check *w)
		1174	{
		1175	if (ev_is_active (w))
		1176	return;
		1177
774	ev_start ((W)w, ++checkcnt);	1178	ev_start (EV_A_ (W)w, ++checkcnt);
775	array_needsize (checks, checkmax, checkcnt, );	1179	array_needsize (checks, checkmax, checkcnt, );
776	checks [checkcnt - 1] = w;	1180	checks [checkcnt - 1] = w;
777	}	1181	}
778		1182
		1183	void
779	void evcheck_stop (struct ev_check *w)	1184	ev_check_stop (EV_P_ struct ev_check *w)
780	{	1185	{
		1186	ev_clear_pending (EV_A_ (W)w);
		1187	if (ev_is_active (w))
		1188	return;
		1189
781	checks [w->active - 1] = checks [--checkcnt];	1190	checks [w->active - 1] = checks [--checkcnt];
782	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
		1192	}
		1193
		1194	void
		1195	ev_child_start (EV_P_ struct ev_child *w)
		1196	{
		1197	if (ev_is_active (w))
		1198	return;
		1199
		1200	ev_start (EV_A_ (W)w, 1);
		1201	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1202	}
		1203
		1204	void
		1205	ev_child_stop (EV_P_ struct ev_child *w)
		1206	{
		1207	ev_clear_pending (EV_A_ (W)w);
		1208	if (ev_is_active (w))
		1209	return;
		1210
		1211	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1212	ev_stop (EV_A_ (W)w);
783	}	1213	}
784		1214
785	/*****************************************************************************/	1215	/*****************************************************************************/
786		1216
		1217	struct ev_once
		1218	{
		1219	struct ev_io io;
		1220	struct ev_timer to;
		1221	void (*cb)(int revents, void *arg);
		1222	void *arg;
		1223	};
		1224
		1225	static void
		1226	once_cb (EV_P_ struct ev_once *once, int revents)
		1227	{
		1228	void (*cb)(int revents, void *arg) = once->cb;
		1229	void *arg = once->arg;
		1230
		1231	ev_io_stop (EV_A_ &once->io);
		1232	ev_timer_stop (EV_A_ &once->to);
		1233	free (once);
		1234
		1235	cb (revents, arg);
		1236	}
		1237
		1238	static void
		1239	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1240	{
		1241	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1242	}
		1243
		1244	static void
		1245	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1246	{
		1247	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1248	}
		1249
		1250	void
		1251	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1252	{
		1253	struct ev_once *once = malloc (sizeof (struct ev_once));
		1254
		1255	if (!once)
		1256	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1257	else
		1258	{
		1259	once->cb = cb;
		1260	once->arg = arg;
		1261
		1262	ev_watcher_init (&once->io, once_cb_io);
		1263	if (fd >= 0)
		1264	{
		1265	ev_io_set (&once->io, fd, events);
		1266	ev_io_start (EV_A_ &once->io);
		1267	}
		1268
		1269	ev_watcher_init (&once->to, once_cb_to);
		1270	if (timeout >= 0.)
		1271	{
		1272	ev_timer_set (&once->to, timeout, 0.);
		1273	ev_timer_start (EV_A_ &once->to);
		1274	}
		1275	}
		1276	}
		1277
		1278	/*****************************************************************************/
		1279
787	#if 1	1280	#if 0
788		1281
789	struct ev_io wio;	1282	struct ev_io wio;
790		1283
791	static void	1284	static void
792	sin_cb (struct ev_io *w, int revents)	1285	sin_cb (struct ev_io *w, int revents)
…		…
796		1289
797	static void	1290	static void
798	ocb (struct ev_timer *w, int revents)	1291	ocb (struct ev_timer *w, int revents)
799	{	1292	{
800	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1293	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
801	evtimer_stop (w);	1294	ev_timer_stop (w);
802	evtimer_start (w);	1295	ev_timer_start (w);
803	}	1296	}
804		1297
805	static void	1298	static void
806	scb (struct ev_signal *w, int revents)	1299	scb (struct ev_signal *w, int revents)
807	{	1300	{
808	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1301	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
809	evio_stop (&wio);	1302	ev_io_stop (&wio);
810	evio_start (&wio);	1303	ev_io_start (&wio);
811	}	1304	}
812		1305
813	static void	1306	static void
814	gcb (struct ev_signal *w, int revents)	1307	gcb (struct ev_signal *w, int revents)
815	{	1308	{
…		…
819		1312
820	int main (void)	1313	int main (void)
821	{	1314	{
822	ev_init (0);	1315	ev_init (0);
823		1316
824	evio_init (&wio, sin_cb, 0, EV_READ);	1317	ev_io_init (&wio, sin_cb, 0, EV_READ);
825	evio_start (&wio);	1318	ev_io_start (&wio);
826		1319
827	struct ev_timer t[10000];	1320	struct ev_timer t[10000];
828		1321
829	#if 0	1322	#if 0
830	int i;	1323	int i;
831	for (i = 0; i < 10000; ++i)	1324	for (i = 0; i < 10000; ++i)
832	{	1325	{
833	struct ev_timer *w = t + i;	1326	struct ev_timer *w = t + i;
834	evw_init (w, ocb, i);	1327	ev_watcher_init (w, ocb, i);
835	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);	1328	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
836	evtimer_start (w);	1329	ev_timer_start (w);
837	if (drand48 () < 0.5)	1330	if (drand48 () < 0.5)
838	evtimer_stop (w);	1331	ev_timer_stop (w);
839	}	1332	}
840	#endif	1333	#endif
841		1334
842	struct ev_timer t1;	1335	struct ev_timer t1;
843	evtimer_init (&t1, ocb, 5, 10);	1336	ev_timer_init (&t1, ocb, 5, 10);
844	evtimer_start (&t1);	1337	ev_timer_start (&t1);
845		1338
846	struct ev_signal sig;	1339	struct ev_signal sig;
847	evsignal_init (&sig, scb, SIGQUIT);	1340	ev_signal_init (&sig, scb, SIGQUIT);
848	evsignal_start (&sig);	1341	ev_signal_start (&sig);
849		1342
850	struct ev_check cw;	1343	struct ev_check cw;
851	evcheck_init (&cw, gcb);	1344	ev_check_init (&cw, gcb);
852	evcheck_start (&cw);	1345	ev_check_start (&cw);
853		1346
854	struct ev_idle iw;	1347	struct ev_idle iw;
855	evidle_init (&iw, gcb);	1348	ev_idle_init (&iw, gcb);
856	evidle_start (&iw);	1349	ev_idle_start (&iw);
857		1350
858	ev_loop (0);	1351	ev_loop (0);
859		1352
860	return 0;	1353	return 0;
861	}	1354	}

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