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Comparing libev/ev.c (file contents):
Revision 1.9 by root, Wed Oct 31 07:24:17 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 2007 UTC

		1	/*
		2	* libev event processing core, watcher management
		3	*
		4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		5	* All rights reserved.
		6	*
		7	* Redistribution and use in source and binary forms, with or without
		8	* modification, are permitted provided that the following conditions are
		9	* met:
		10	*
		11	* * Redistributions of source code must retain the above copyright
		12	* notice, this list of conditions and the following disclaimer.
		13	*
		14	* * Redistributions in binary form must reproduce the above
		15	* copyright notice, this list of conditions and the following
		16	* disclaimer in the documentation and/or other materials provided
		17	* with the distribution.
		18	*
		19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
		34
1	#include <math.h>	35	#include <math.h>
2	#include <stdlib.h>	36	#include <stdlib.h>
3	#include <unistd.h>	37	#include <unistd.h>
4	#include <fcntl.h>	38	#include <fcntl.h>
5	#include <signal.h>	39	#include <signal.h>
		40	#include <stddef.h>
6		41
7	#include <stdio.h>	42	#include <stdio.h>
8		43
9	#include <assert.h>	44	#include <assert.h>
10	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
11	#include <sys/time.h>	50	#include <sys/time.h>
12	#include <time.h>	51	#include <time.h>
13		52
		53	/**/
		54
		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
14	#ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
15	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
16	#endif	84	#endif
17		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
18	#define HAVE_REALTIME 1	88	# define EV_USE_REALTIME 0
19	#define HAVE_EPOLL 1	89	#endif
20	#define HAVE_SELECT 1	90
		91	/**/
21		92
22	#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) */
23	#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 */
24		97
25	#include "ev.h"	98	#include "ev.h"
26		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		113
27	struct ev_watcher {	114	typedef struct ev_watcher *W;
28	EV_WATCHER (ev_watcher);	115	typedef struct ev_watcher_list *WL;
		116	typedef struct ev_watcher_time *WT;
		117
		118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		119
		120	/*****************************************************************************/
		121
		122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#ifdef EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
29	};	141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
30		144
31	struct ev_watcher_list {	145	#else
32	EV_WATCHER_LIST (ev_watcher_list);
33	};
34		146
35	static ev_tstamp now, diff; /* monotonic clock */	147	# define VAR(name,decl) static decl;
36	ev_tstamp ev_now;	148	# include "ev_vars.h"
37	int ev_method;	149	# undef VAR
38		150
39	static int have_monotonic; /* runtime */	151	#endif
40
41	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
42	static void (*method_modify)(int fd, int oev, int nev);
43	static void (*method_poll)(ev_tstamp timeout);
44		152
45	/*****************************************************************************/	153	/*****************************************************************************/
46		154
47	ev_tstamp	155	inline ev_tstamp
48	ev_time (void)	156	ev_time (void)
49	{	157	{
50	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
51	struct timespec ts;	159	struct timespec ts;
52	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
53	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
54	#else	162	#else
55	struct timeval tv;	163	struct timeval tv;
56	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
57	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
58	#endif	166	#endif
59	}	167	}
60		168
61	static ev_tstamp	169	inline ev_tstamp
62	get_clock (void)	170	get_clock (void)
63	{	171	{
64	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
65	if (have_monotonic)	173	if (expect_true (have_monotonic))
66	{	174	{
67	struct timespec ts;	175	struct timespec ts;
68	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
69	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
70	}	178	}
71	#endif	179	#endif
72		180
73	return ev_time ();	181	return ev_time ();
74	}	182	}
75		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
76	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
77	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
78	{ \	194	{ \
79	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
80	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	\
81	base = realloc (base, sizeof (*base) * (newcnt)); \	202	base = realloc (base, sizeof (*base) * (newcnt)); \
82	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
83	cur = newcnt; \	204	cur = newcnt; \
84	}	205	}
85		206
86	/*****************************************************************************/	207	/*****************************************************************************/
87		208
88	typedef struct
89	{
90	struct ev_io *head;
91	unsigned char wev, rev; /* want, received event set */
92	} ANFD;
93
94	static ANFD *anfds;
95	static int anfdmax;
96
97	static int *fdchanges;
98	static int fdchangemax, fdchangecnt;
99
100	static void	209	static void
101	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
102	{	211	{
103	while (count--)	212	while (count--)
104	{	213	{
105	base->head = 0;	214	base->head = 0;
106	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
107	++base;	218	++base;
108	}	219	}
109	}	220	}
110		221
111	typedef struct
112	{
113	struct ev_watcher *w;
114	int events;
115	} ANPENDING;
116
117	static ANPENDING *pendings;
118	static int pendingmax, pendingcnt;
119
120	static void	222	static void
121	event (struct ev_watcher *w, int events)	223	event (EV_P_ W w, int events)
122	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
		229	}
		230
123	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
124	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
125	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
126	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
127	}	235	}
128		236
129	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
130	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
131	{	248	{
132	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
133	struct ev_io *w;	250	struct ev_io *w;
134		251
135	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
136	{	253	{
137	int ev = w->events & events;	254	int ev = w->events & events;
138		255
139	if (ev)	256	if (ev)
140	event ((struct ev_watcher *)w, ev);	257	event (EV_A_ (W)w, ev);
141	}	258	}
142	}	259	}
143		260
		261	/*****************************************************************************/
		262
144	static void	263	static void
145	queue_events (struct ev_watcher **events, int eventcnt, int type)	264	fd_reify (EV_P)
146	{	265	{
147	int i;	266	int i;
148		267
149	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
150	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	}
151	}	341	}
152		342
153	/*****************************************************************************/	343	/*****************************************************************************/
154		344
155	static struct ev_timer **atimers;
156	static int atimermax, atimercnt;
157
158	static struct ev_timer **rtimers;
159	static int rtimermax, rtimercnt;
160
161	static void	345	static void
162	upheap (struct ev_timer **timers, int k)	346	upheap (WT *heap, int k)
163	{	347	{
164	struct ev_timer *w = timers [k];	348	WT w = heap [k];
165		349
166	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
167	{	351	{
168	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
169	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
170	k >>= 1;	354	k >>= 1;
171	}	355	}
172		356
173	timers [k] = w;	357	heap [k] = w;
174	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
175		359
176	}	360	}
177		361
178	static void	362	static void
179	downheap (struct ev_timer **timers, int N, int k)	363	downheap (WT *heap, int N, int k)
180	{	364	{
181	struct ev_timer *w = timers [k];	365	WT w = heap [k];
182		366
183	while (k < (N >> 1))	367	while (k < (N >> 1))
184	{	368	{
185	int j = k << 1;	369	int j = k << 1;
186		370
187	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
188	++j;	372	++j;
189		373
190	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
191	break;	375	break;
192		376
193	timers [k] = timers [j];	377	heap [k] = heap [j];
194	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
195	k = j;	379	k = j;
196	}	380	}
197		381
198	timers [k] = w;	382	heap [k] = w;
199	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
200	}	384	}
201		385
202	/*****************************************************************************/	386	/*****************************************************************************/
203		387
204	typedef struct	388	typedef struct
205	{	389	{
206	struct ev_signal *head;	390	struct ev_watcher_list *head;
207	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
208	} ANSIG;	392	} ANSIG;
209		393
210	static ANSIG *signals;	394	static ANSIG *signals;
211	static int signalmax;	395	static int signalmax;
212		396
213	static int sigpipe [2];	397	static int sigpipe [2];
214	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
215	static struct ev_io sigev;
216		399
217	static void	400	static void
218	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
219	{	402	{
220	while (count--)	403	while (count--)
221	{	404	{
222	base->head = 0;	405	base->head = 0;
223	base->gotsig = 0;	406	base->gotsig = 0;
		407
224	++base;	408	++base;
225	}	409	}
226	}	410	}
227		411
228	static void	412	static void
…		…
230	{	414	{
231	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
232		416
233	if (!gotsig)	417	if (!gotsig)
234	{	418	{
		419	int old_errno = errno;
235	gotsig = 1;	420	gotsig = 1;
236	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
237	}	423	}
238	}	424	}
239		425
240	static void	426	static void
241	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
242	{	428	{
243	struct ev_signal *w;	429	struct ev_watcher_list *w;
244	int sig;	430	int signum;
245		431
		432	read (sigpipe [0], &revents, 1);
246	gotsig = 0;	433	gotsig = 0;
247	read (sigpipe [0], &revents, 1);
248		434
249	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
250	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
251	{	437	{
252	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
253		439
254	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
255	event ((struct ev_watcher *)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
256	}	442	}
257	}	443	}
258		444
259	static void	445	static void
260	siginit (void)	446	siginit (EV_P)
261	{	447	{
		448	#ifndef WIN32
262	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
263	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
264		451
265	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
266	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
267	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
268		456
269	evio_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
270	evio_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
271	}	460	}
272		461
273	/*****************************************************************************/	462	/*****************************************************************************/
274		463
275	static struct ev_idle **idles;	464	#ifndef WIN32
276	static int idlemax, idlecnt;
277		465
278	static struct ev_check **checks;	466	#ifndef WCONTINUED
279	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
280		501
281	/*****************************************************************************/	502	/*****************************************************************************/
282		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
283	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
284	# include "ev_epoll.c"	508	# include "ev_epoll.c"
285	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
286	#if HAVE_SELECT	513	#if EV_USE_SELECT
287	# include "ev_select.c"	514	# include "ev_select.c"
288	#endif	515	#endif
289		516
290	int ev_init (int flags)	517	int
		518	ev_version_major (void)
291	{	519	{
		520	return EV_VERSION_MAJOR;
		521	}
		522
		523	int
		524	ev_version_minor (void)
		525	{
		526	return EV_VERSION_MINOR;
		527	}
		528
		529	/* return true if we are running with elevated privileges and should ignore env variables */
		530	static int
		531	enable_secure (void)
		532	{
		533	#ifdef WIN32
		534	return 0;
		535	#else
		536	return getuid () != geteuid ()
		537	|| getgid () != getegid ();
		538	#endif
		539	}
		540
		541	int
		542	ev_method (EV_P)
		543	{
		544	return method;
		545	}
		546
		547	static void
		548	loop_init (EV_P_ int methods)
		549	{
		550	if (!method)
		551	{
292	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
293	{	553	{
294	struct timespec ts;	554	struct timespec ts;
295	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
296	have_monotonic = 1;	556	have_monotonic = 1;
297	}	557	}
298	#endif	558	#endif
299		559
300	ev_now = ev_time ();	560	rt_now = ev_time ();
301	now = get_clock ();	561	mn_now = get_clock ();
302	diff = ev_now - now;	562	now_floor = mn_now;
		563	rtmn_diff = rt_now - mn_now;
303		564
304	if (pipe (sigpipe))	565	if (pipe (sigpipe))
305	return 0;	566	return 0;
306		567
307	ev_method = EVMETHOD_NONE;	568	if (methods == EVMETHOD_AUTO)
		569	if (!enable_secure () && getenv ("LIBmethodS"))
		570	methods = atoi (getenv ("LIBmethodS"));
		571	else
		572	methods = EVMETHOD_ANY;
		573
		574	method = 0;
		575	#if EV_USE_KQUEUE
		576	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		577	#endif
308	#if HAVE_EPOLL	578	#if EV_USE_EPOLL
309	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
310	#endif	580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
311	#if HAVE_SELECT	584	#if EV_USE_SELECT
312	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
313	#endif	586	#endif
314		587
315	if (ev_method)	588	if (method)
316	{	589	{
317	evw_init (&sigev, sigcb, 0);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
318	siginit ();	592	siginit (EV_A);
319	}
320		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
321	return ev_method;	603	return method;
322	}	604	}
		605
		606	#ifdef EV_MULTIPLICITY
		607
		608	struct ev_loop *
		609	ev_loop_new (int methods)
		610	{
		611	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		612
		613	loop_init (EV_A_ methods);
		614
		615	return loop;
		616	}
		617
		618	void
		619	ev_loop_delete (EV_P)
		620	{
		621	/*TODO*/
		622	free (loop);
		623	}
		624
		625	#else
		626
		627	int
		628	ev_init (int methods)
		629	{
		630	loop_init ();
		631	}
		632
		633	#endif
323		634
324	/*****************************************************************************/	635	/*****************************************************************************/
325		636
326	void ev_prefork (void)	637	void
		638	ev_fork_prepare (void)
327	{	639	{
		640	/* nop */
328	}	641	}
329		642
		643	void
330	void ev_postfork_parent (void)	644	ev_fork_parent (void)
331	{	645	{
		646	/* nop */
332	}	647	}
333		648
		649	void
334	void ev_postfork_child (void)	650	ev_fork_child (void)
335	{	651	{
		652	/*TODO*/
		653	#if !EV_MULTIPLICITY
336	#if HAVE_EPOLL	654	#if EV_USE_EPOLL
337	if (ev_method == EVMETHOD_EPOLL)	655	if (method == EVMETHOD_EPOLL)
338	epoll_postfork_child ();	656	epoll_postfork_child (EV_A);
339	#endif	657	#endif
340		658
341	evio_stop (&sigev);	659	ev_io_stop (EV_A_ &sigev);
342	close (sigpipe [0]);	660	close (sigpipe [0]);
343	close (sigpipe [1]);	661	close (sigpipe [1]);
344	pipe (sigpipe);	662	pipe (sigpipe);
345	siginit ();	663	siginit (EV_A);
		664	#endif
346	}	665	}
347		666
348	/*****************************************************************************/	667	/*****************************************************************************/
349		668
350	static void	669	static void
351	fd_reify (void)	670	call_pending (EV_P)
352	{	671	{
353	int i;	672	int pri;
354		673
355	for (i = 0; i < fdchangecnt; ++i)	674	for (pri = NUMPRI; pri--; )
356	{	675	while (pendingcnt [pri])
357	int fd = fdchanges [i];
358	ANFD *anfd = anfds + fd;
359	struct ev_io *w;
360
361	int wev = 0;
362
363	for (w = anfd->head; w; w = w->next)
364	wev |= w->events;
365
366	if (anfd->wev != wev)
367	{	676	{
368	method_modify (fd, anfd->wev, wev);	677	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
369	anfd->wev = wev;
370	}
371	}
372		678
373	fdchangecnt = 0;
374	}
375
376	static void
377	call_pending ()
378	{
379	int i;
380
381	for (i = 0; i < pendingcnt; ++i)
382	{
383	ANPENDING *p = pendings + i;
384
385	if (p->w)	679	if (p->w)
386	{	680	{
387	p->w->pending = 0;	681	p->w->pending = 0;
388	p->w->cb (p->w, p->events);	682	p->w->cb (EV_A_ p->w, p->events);
389	}	683	}
390	}	684	}
391
392	pendingcnt = 0;
393	}	685	}
394		686
395	static void	687	static void
396	timers_reify (struct ev_timer **timers, int timercnt, ev_tstamp now)	688	timers_reify (EV_P)
397	{	689	{
398	while (timercnt && timers [0]->at <= now)	690	while (timercnt && timers [0]->at <= mn_now)
399	{	691	{
400	struct ev_timer *w = timers [0];	692	struct ev_timer *w = timers [0];
401		693
402	/* first reschedule or stop timer */	694	/* first reschedule or stop timer */
403	if (w->repeat)	695	if (w->repeat)
404	{	696	{
405	if (w->is_abs)	697	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
406	w->at += floor ((now - w->at) / w->repeat + 1.) * w->repeat;
407	else
408	w->at = now + w->repeat;	698	w->at = mn_now + w->repeat;
409
410	assert (w->at > now);
411
412	downheap (timers, timercnt, 0);	699	downheap ((WT *)timers, timercnt, 0);
413	}	700	}
414	else	701	else
		702	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		703
		704	event (EV_A_ (W)w, EV_TIMEOUT);
		705	}
		706	}
		707
		708	static void
		709	periodics_reify (EV_P)
		710	{
		711	while (periodiccnt && periodics [0]->at <= rt_now)
		712	{
		713	struct ev_periodic *w = periodics [0];
		714
		715	/* first reschedule or stop timer */
		716	if (w->interval)
415	{	717	{
416	evtimer_stop (w); /* nonrepeating: stop timer */	718	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
417	--timercnt; /* maybe pass by reference instead? */	719	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
		720	downheap ((WT *)periodics, periodiccnt, 0);
418	}	721	}
		722	else
		723	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
419		724
420	event ((struct ev_watcher *)w, EV_TIMEOUT);	725	event (EV_A_ (W)w, EV_PERIODIC);
421	}	726	}
422	}	727	}
423		728
424	static void	729	static void
425	time_update ()	730	periodics_reschedule (EV_P)
426	{	731	{
427	int i;	732	int i;
428	ev_now = ev_time ();
429		733
430	if (have_monotonic)	734	/* adjust periodics after time jump */
		735	for (i = 0; i < periodiccnt; ++i)
431	{	736	{
432	ev_tstamp odiff = diff;	737	struct ev_periodic *w = periodics [i];
433		738
434	/* detecting time jumps is much more difficult */	739	if (w->interval)
435	for (i = 2; --i; ) /* loop a few times, before making important decisions */
436	{	740	{
437	now = get_clock ();	741	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
438	diff = ev_now - now;
439		742
440	if (fabs (odiff - diff) < MIN_TIMEJUMP)	743	if (fabs (diff) >= 1e-4)
441	return; /* all is well */	744	{
		745	ev_periodic_stop (EV_A_ w);
		746	ev_periodic_start (EV_A_ w);
442		747
443	ev_now = ev_time ();	748	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		749	}
444	}	750	}
		751	}
		752	}
445		753
446	/* time jump detected, reschedule atimers */	754	inline int
447	for (i = 0; i < atimercnt; ++i)	755	time_update_monotonic (EV_P)
		756	{
		757	mn_now = get_clock ();
		758
		759	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		760	{
		761	rt_now = rtmn_diff + mn_now;
		762	return 0;
		763	}
		764	else
		765	{
		766	now_floor = mn_now;
		767	rt_now = ev_time ();
		768	return 1;
		769	}
		770	}
		771
		772	static void
		773	time_update (EV_P)
		774	{
		775	int i;
		776
		777	#if EV_USE_MONOTONIC
		778	if (expect_true (have_monotonic))
		779	{
		780	if (time_update_monotonic (EV_A))
448	{	781	{
449	struct ev_timer *w = atimers [i];	782	ev_tstamp odiff = rtmn_diff;
450	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;	783
		784	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		785	{
		786	rtmn_diff = rt_now - mn_now;
		787
		788	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
		789	return; /* all is well */
		790
		791	rt_now = ev_time ();
		792	mn_now = get_clock ();
		793	now_floor = mn_now;
		794	}
		795
		796	periodics_reschedule (EV_A);
		797	/* no timer adjustment, as the monotonic clock doesn't jump */
		798	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
451	}	799	}
452	}	800	}
453	else	801	else
		802	#endif
454	{	803	{
455	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	804	rt_now = ev_time ();
456	/* time jump detected, adjust rtimers */	805
		806	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
		807	{
		808	periodics_reschedule (EV_A);
		809
		810	/* adjust timers. this is easy, as the offset is the same for all */
457	for (i = 0; i < rtimercnt; ++i)	811	for (i = 0; i < timercnt; ++i)
458	rtimers [i]->at += ev_now - now;	812	timers [i]->at += rt_now - mn_now;
		813	}
459		814
460	now = ev_now;	815	mn_now = rt_now;
461	}	816	}
462	}	817	}
463		818
464	int ev_loop_done;	819	void
		820	ev_ref (EV_P)
		821	{
		822	++activecnt;
		823	}
465		824
		825	void
		826	ev_unref (EV_P)
		827	{
		828	--activecnt;
		829	}
		830
		831	static int loop_done;
		832
		833	void
466	void ev_loop (int flags)	834	ev_loop (EV_P_ int flags)
467	{	835	{
468	double block;	836	double block;
469	ev_loop_done = flags & EVLOOP_ONESHOT;	837	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
470
471	if (checkcnt)
472	{
473	queue_events (checks, checkcnt, EV_CHECK);
474	call_pending ();
475	}
476		838
477	do	839	do
478	{	840	{
		841	/* queue check watchers (and execute them) */
		842	if (expect_false (preparecnt))
		843	{
		844	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
		845	call_pending (EV_A);
		846	}
		847
479	/* update fd-related kernel structures */	848	/* update fd-related kernel structures */
480	fd_reify ();	849	fd_reify (EV_A);
481		850
482	/* calculate blocking time */	851	/* calculate blocking time */
		852
		853	/* we only need this for !monotonic clockor timers, but as we basically
		854	always have timers, we just calculate it always */
		855	#if EV_USE_MONOTONIC
		856	if (expect_true (have_monotonic))
		857	time_update_monotonic (EV_A);
		858	else
		859	#endif
		860	{
		861	rt_now = ev_time ();
		862	mn_now = rt_now;
		863	}
		864
483	if (flags & EVLOOP_NONBLOCK || idlecnt)	865	if (flags & EVLOOP_NONBLOCK || idlecnt)
484	block = 0.;	866	block = 0.;
485	else	867	else
486	{	868	{
487	block = MAX_BLOCKTIME;	869	block = MAX_BLOCKTIME;
488		870
489	if (rtimercnt)	871	if (timercnt)
490	{	872	{
491	ev_tstamp to = rtimers [0]->at - get_clock () + method_fudge;	873	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
492	if (block > to) block = to;	874	if (block > to) block = to;
493	}	875	}
494		876
495	if (atimercnt)	877	if (periodiccnt)
496	{	878	{
497	ev_tstamp to = atimers [0]->at - ev_time () + method_fudge;	879	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
498	if (block > to) block = to;	880	if (block > to) block = to;
499	}	881	}
500		882
501	if (block < 0.) block = 0.;	883	if (block < 0.) block = 0.;
502	}	884	}
503		885
504	method_poll (block);	886	method_poll (EV_A_ block);
505		887
506	/* update ev_now, do magic */	888	/* update rt_now, do magic */
507	time_update ();	889	time_update (EV_A);
508		890
509	/* queue pending timers and reschedule them */	891	/* queue pending timers and reschedule them */
510	/* absolute timers first */	892	timers_reify (EV_A); /* relative timers called last */
511	timers_reify (atimers, atimercnt, ev_now);	893	periodics_reify (EV_A); /* absolute timers called first */
512	/* relative timers second */
513	timers_reify (rtimers, rtimercnt, now);
514		894
515	/* queue idle watchers unless io or timers are pending */	895	/* queue idle watchers unless io or timers are pending */
516	if (!pendingcnt)	896	if (!pendingcnt)
517	queue_events (idles, idlecnt, EV_IDLE);	897	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
518		898
519	/* queue check and possibly idle watchers */	899	/* queue check watchers, to be executed first */
		900	if (checkcnt)
520	queue_events (checks, checkcnt, EV_CHECK);	901	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
521		902
522	call_pending ();	903	call_pending (EV_A);
523	}	904	}
524	while (!ev_loop_done);	905	while (activecnt && !loop_done);
		906
		907	if (loop_done != 2)
		908	loop_done = 0;
		909	}
		910
		911	void
		912	ev_unloop (EV_P_ int how)
		913	{
		914	loop_done = how;
525	}	915	}
526		916
527	/*****************************************************************************/	917	/*****************************************************************************/
528		918
529	static void	919	inline void
530	wlist_add (struct ev_watcher_list **head, struct ev_watcher_list *elem)	920	wlist_add (WL *head, WL elem)
531	{	921	{
532	elem->next = *head;	922	elem->next = *head;
533	*head = elem;	923	*head = elem;
534	}	924	}
535		925
536	static void	926	inline void
537	wlist_del (struct ev_watcher_list **head, struct ev_watcher_list *elem)	927	wlist_del (WL *head, WL elem)
538	{	928	{
539	while (*head)	929	while (*head)
540	{	930	{
541	if (*head == elem)	931	if (*head == elem)
542	{	932	{
…		…
546		936
547	head = &(*head)->next;	937	head = &(*head)->next;
548	}	938	}
549	}	939	}
550		940
551	static void	941	inline void
552	ev_start (struct ev_watcher *w, int active)	942	ev_clear_pending (EV_P_ W w)
553	{	943	{
		944	if (w->pending)
		945	{
		946	pendings [ABSPRI (w)][w->pending - 1].w = 0;
554	w->pending = 0;	947	w->pending = 0;
		948	}
		949	}
		950
		951	inline void
		952	ev_start (EV_P_ W w, int active)
		953	{
		954	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		955	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		956
555	w->active = active;	957	w->active = active;
		958	ev_ref (EV_A);
556	}	959	}
557		960
558	static void	961	inline void
559	ev_stop (struct ev_watcher *w)	962	ev_stop (EV_P_ W w)
560	{	963	{
561	if (w->pending)	964	ev_unref (EV_A);
562	pendings [w->pending - 1].w = 0;
563
564	w->active = 0;	965	w->active = 0;
565	/* nop */
566	}	966	}
567		967
568	/*****************************************************************************/	968	/*****************************************************************************/
569		969
570	void	970	void
571	evio_start (struct ev_io *w)	971	ev_io_start (EV_P_ struct ev_io *w)
572	{	972	{
		973	int fd = w->fd;
		974
573	if (ev_is_active (w))	975	if (ev_is_active (w))
574	return;	976	return;
575		977
576	int fd = w->fd;	978	assert (("ev_io_start called with negative fd", fd >= 0));
577		979
578	ev_start ((struct ev_watcher *)w, 1);	980	ev_start (EV_A_ (W)w, 1);
579	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	981	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
580	wlist_add ((struct ev_watcher_list **)&anfds[fd].head, (struct ev_watcher_list *)w);	982	wlist_add ((WL *)&anfds[fd].head, (WL)w);
581		983
582	++fdchangecnt;	984	fd_change (EV_A_ fd);
583	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
584	fdchanges [fdchangecnt - 1] = fd;
585	}	985	}
586		986
587	void	987	void
588	evio_stop (struct ev_io *w)	988	ev_io_stop (EV_P_ struct ev_io *w)
589	{	989	{
		990	ev_clear_pending (EV_A_ (W)w);
590	if (!ev_is_active (w))	991	if (!ev_is_active (w))
591	return;	992	return;
592		993
593	wlist_del ((struct ev_watcher_list **)&anfds[w->fd].head, (struct ev_watcher_list *)w);	994	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
594	ev_stop ((struct ev_watcher *)w);	995	ev_stop (EV_A_ (W)w);
595		996
596	++fdchangecnt;	997	fd_change (EV_A_ w->fd);
597	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
598	fdchanges [fdchangecnt - 1] = w->fd;
599	}	998	}
600		999
601	void	1000	void
602	evtimer_start (struct ev_timer *w)	1001	ev_timer_start (EV_P_ struct ev_timer *w)
603	{	1002	{
604	if (ev_is_active (w))	1003	if (ev_is_active (w))
605	return;	1004	return;
606		1005
607	if (w->is_abs)	1006	w->at += mn_now;
		1007
		1008	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
		1009
		1010	ev_start (EV_A_ (W)w, ++timercnt);
		1011	array_needsize (timers, timermax, timercnt, );
		1012	timers [timercnt - 1] = w;
		1013	upheap ((WT *)timers, timercnt - 1);
		1014	}
		1015
		1016	void
		1017	ev_timer_stop (EV_P_ struct ev_timer *w)
		1018	{
		1019	ev_clear_pending (EV_A_ (W)w);
		1020	if (!ev_is_active (w))
		1021	return;
		1022
		1023	if (w->active < timercnt--)
		1024	{
		1025	timers [w->active - 1] = timers [timercnt];
		1026	downheap ((WT *)timers, timercnt, w->active - 1);
608	{	1027	}
609	/* this formula differs from the one in timer_reify becuse we do not round up */	1028
		1029	w->at = w->repeat;
		1030
		1031	ev_stop (EV_A_ (W)w);
		1032	}
		1033
		1034	void
		1035	ev_timer_again (EV_P_ struct ev_timer *w)
		1036	{
		1037	if (ev_is_active (w))
		1038	{
610	if (w->repeat)	1039	if (w->repeat)
611	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;	1040	{
612		1041	w->at = mn_now + w->repeat;
613	ev_start ((struct ev_watcher *)w, ++atimercnt);	1042	downheap ((WT *)timers, timercnt, w->active - 1);
614	array_needsize (atimers, atimermax, atimercnt, );	1043	}
615	atimers [atimercnt - 1] = w;
616	upheap (atimers, atimercnt - 1);
617	}
618	else	1044	else
		1045	ev_timer_stop (EV_A_ w);
619	{	1046	}
620	w->at += now;	1047	else if (w->repeat)
621		1048	ev_timer_start (EV_A_ w);
622	ev_start ((struct ev_watcher *)w, ++rtimercnt);
623	array_needsize (rtimers, rtimermax, rtimercnt, );
624	rtimers [rtimercnt - 1] = w;
625	upheap (rtimers, rtimercnt - 1);
626	}
627
628	}	1049	}
629		1050
630	void	1051	void
631	evtimer_stop (struct ev_timer *w)	1052	ev_periodic_start (EV_P_ struct ev_periodic *w)
632	{	1053	{
		1054	if (ev_is_active (w))
		1055	return;
		1056
		1057	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
		1058
		1059	/* this formula differs from the one in periodic_reify because we do not always round up */
		1060	if (w->interval)
		1061	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
		1062
		1063	ev_start (EV_A_ (W)w, ++periodiccnt);
		1064	array_needsize (periodics, periodicmax, periodiccnt, );
		1065	periodics [periodiccnt - 1] = w;
		1066	upheap ((WT *)periodics, periodiccnt - 1);
		1067	}
		1068
		1069	void
		1070	ev_periodic_stop (EV_P_ struct ev_periodic *w)
		1071	{
		1072	ev_clear_pending (EV_A_ (W)w);
633	if (!ev_is_active (w))	1073	if (!ev_is_active (w))
634	return;	1074	return;
635		1075
636	if (w->is_abs)
637	{
638	if (w->active < atimercnt--)	1076	if (w->active < periodiccnt--)
639	{
640	atimers [w->active - 1] = atimers [atimercnt];
641	downheap (atimers, atimercnt, w->active - 1);
642	}
643	}	1077	{
644	else	1078	periodics [w->active - 1] = periodics [periodiccnt];
		1079	downheap ((WT *)periodics, periodiccnt, w->active - 1);
645	{	1080	}
646	if (w->active < rtimercnt--)
647	{
648	rtimers [w->active - 1] = rtimers [rtimercnt];
649	downheap (rtimers, rtimercnt, w->active - 1);
650	}
651	}
652		1081
653	ev_stop ((struct ev_watcher *)w);	1082	ev_stop (EV_A_ (W)w);
654	}	1083	}
655		1084
		1085	#ifndef SA_RESTART
		1086	# define SA_RESTART 0
		1087	#endif
		1088
656	void	1089	void
657	evsignal_start (struct ev_signal *w)	1090	ev_signal_start (EV_P_ struct ev_signal *w)
658	{	1091	{
659	if (ev_is_active (w))	1092	if (ev_is_active (w))
660	return;	1093	return;
661		1094
662	ev_start ((struct ev_watcher *)w, 1);	1095	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1096
		1097	ev_start (EV_A_ (W)w, 1);
663	array_needsize (signals, signalmax, w->signum, signals_init);	1098	array_needsize (signals, signalmax, w->signum, signals_init);
664	wlist_add ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1099	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
665		1100
666	if (!w->next)	1101	if (!w->next)
667	{	1102	{
668	struct sigaction sa;	1103	struct sigaction sa;
669	sa.sa_handler = sighandler;	1104	sa.sa_handler = sighandler;
670	sigfillset (&sa.sa_mask);	1105	sigfillset (&sa.sa_mask);
671	sa.sa_flags = 0;	1106	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
672	sigaction (w->signum, &sa, 0);	1107	sigaction (w->signum, &sa, 0);
673	}	1108	}
674	}	1109	}
675		1110
676	void	1111	void
677	evsignal_stop (struct ev_signal *w)	1112	ev_signal_stop (EV_P_ struct ev_signal *w)
678	{	1113	{
		1114	ev_clear_pending (EV_A_ (W)w);
679	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
680	return;	1116	return;
681		1117
682	wlist_del ((struct ev_watcher_list **)&signals [w->signum - 1].head, (struct ev_watcher_list *)w);	1118	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
683	ev_stop ((struct ev_watcher *)w);	1119	ev_stop (EV_A_ (W)w);
684		1120
685	if (!signals [w->signum - 1].head)	1121	if (!signals [w->signum - 1].head)
686	signal (w->signum, SIG_DFL);	1122	signal (w->signum, SIG_DFL);
687	}	1123	}
688		1124
		1125	void
689	void evidle_start (struct ev_idle *w)	1126	ev_idle_start (EV_P_ struct ev_idle *w)
690	{	1127	{
691	if (ev_is_active (w))	1128	if (ev_is_active (w))
692	return;	1129	return;
693		1130
694	ev_start ((struct ev_watcher *)w, ++idlecnt);	1131	ev_start (EV_A_ (W)w, ++idlecnt);
695	array_needsize (idles, idlemax, idlecnt, );	1132	array_needsize (idles, idlemax, idlecnt, );
696	idles [idlecnt - 1] = w;	1133	idles [idlecnt - 1] = w;
697	}	1134	}
698		1135
		1136	void
699	void evidle_stop (struct ev_idle *w)	1137	ev_idle_stop (EV_P_ struct ev_idle *w)
700	{	1138	{
		1139	ev_clear_pending (EV_A_ (W)w);
		1140	if (ev_is_active (w))
		1141	return;
		1142
701	idles [w->active - 1] = idles [--idlecnt];	1143	idles [w->active - 1] = idles [--idlecnt];
702	ev_stop ((struct ev_watcher *)w);	1144	ev_stop (EV_A_ (W)w);
703	}	1145	}
704		1146
705	void evcheck_start (struct ev_check *w)	1147	void
		1148	ev_prepare_start (EV_P_ struct ev_prepare *w)
706	{	1149	{
707	if (ev_is_active (w))	1150	if (ev_is_active (w))
708	return;	1151	return;
709		1152
710	ev_start ((struct ev_watcher *)w, ++checkcnt);	1153	ev_start (EV_A_ (W)w, ++preparecnt);
		1154	array_needsize (prepares, preparemax, preparecnt, );
		1155	prepares [preparecnt - 1] = w;
		1156	}
		1157
		1158	void
		1159	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1160	{
		1161	ev_clear_pending (EV_A_ (W)w);
		1162	if (ev_is_active (w))
		1163	return;
		1164
		1165	prepares [w->active - 1] = prepares [--preparecnt];
		1166	ev_stop (EV_A_ (W)w);
		1167	}
		1168
		1169	void
		1170	ev_check_start (EV_P_ struct ev_check *w)
		1171	{
		1172	if (ev_is_active (w))
		1173	return;
		1174
		1175	ev_start (EV_A_ (W)w, ++checkcnt);
711	array_needsize (checks, checkmax, checkcnt, );	1176	array_needsize (checks, checkmax, checkcnt, );
712	checks [checkcnt - 1] = w;	1177	checks [checkcnt - 1] = w;
713	}	1178	}
714		1179
		1180	void
715	void evcheck_stop (struct ev_check *w)	1181	ev_check_stop (EV_P_ struct ev_check *w)
716	{	1182	{
		1183	ev_clear_pending (EV_A_ (W)w);
		1184	if (ev_is_active (w))
		1185	return;
		1186
717	checks [w->active - 1] = checks [--checkcnt];	1187	checks [w->active - 1] = checks [--checkcnt];
718	ev_stop ((struct ev_watcher *)w);	1188	ev_stop (EV_A_ (W)w);
		1189	}
		1190
		1191	void
		1192	ev_child_start (EV_P_ struct ev_child *w)
		1193	{
		1194	if (ev_is_active (w))
		1195	return;
		1196
		1197	ev_start (EV_A_ (W)w, 1);
		1198	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1199	}
		1200
		1201	void
		1202	ev_child_stop (EV_P_ struct ev_child *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1209	ev_stop (EV_A_ (W)w);
719	}	1210	}
720		1211
721	/*****************************************************************************/	1212	/*****************************************************************************/
		1213
		1214	struct ev_once
		1215	{
		1216	struct ev_io io;
		1217	struct ev_timer to;
		1218	void (*cb)(int revents, void *arg);
		1219	void *arg;
		1220	};
		1221
		1222	static void
		1223	once_cb (EV_P_ struct ev_once *once, int revents)
		1224	{
		1225	void (*cb)(int revents, void *arg) = once->cb;
		1226	void *arg = once->arg;
		1227
		1228	ev_io_stop (EV_A_ &once->io);
		1229	ev_timer_stop (EV_A_ &once->to);
		1230	free (once);
		1231
		1232	cb (revents, arg);
		1233	}
		1234
		1235	static void
		1236	once_cb_io (EV_P_ struct ev_io *w, int revents)
		1237	{
		1238	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
		1239	}
		1240
		1241	static void
		1242	once_cb_to (EV_P_ struct ev_timer *w, int revents)
		1243	{
		1244	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
		1245	}
		1246
		1247	void
		1248	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
		1249	{
		1250	struct ev_once *once = malloc (sizeof (struct ev_once));
		1251
		1252	if (!once)
		1253	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
		1254	else
		1255	{
		1256	once->cb = cb;
		1257	once->arg = arg;
		1258
		1259	ev_watcher_init (&once->io, once_cb_io);
		1260	if (fd >= 0)
		1261	{
		1262	ev_io_set (&once->io, fd, events);
		1263	ev_io_start (EV_A_ &once->io);
		1264	}
		1265
		1266	ev_watcher_init (&once->to, once_cb_to);
		1267	if (timeout >= 0.)
		1268	{
		1269	ev_timer_set (&once->to, timeout, 0.);
		1270	ev_timer_start (EV_A_ &once->to);
		1271	}
		1272	}
		1273	}
		1274
		1275	/*****************************************************************************/
		1276
722	#if 1	1277	#if 0
		1278
		1279	struct ev_io wio;
723		1280
724	static void	1281	static void
725	sin_cb (struct ev_io *w, int revents)	1282	sin_cb (struct ev_io *w, int revents)
726	{	1283	{
727	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1284	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
…		…
729		1286
730	static void	1287	static void
731	ocb (struct ev_timer *w, int revents)	1288	ocb (struct ev_timer *w, int revents)
732	{	1289	{
733	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1290	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
734	evtimer_stop (w);	1291	ev_timer_stop (w);
735	evtimer_start (w);	1292	ev_timer_start (w);
736	}	1293	}
737		1294
738	static void	1295	static void
739	scb (struct ev_signal *w, int revents)	1296	scb (struct ev_signal *w, int revents)
740	{	1297	{
741	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1298	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1299	ev_io_stop (&wio);
		1300	ev_io_start (&wio);
742	}	1301	}
743		1302
744	static void	1303	static void
745	gcb (struct ev_signal *w, int revents)	1304	gcb (struct ev_signal *w, int revents)
746	{	1305	{
747	fprintf (stderr, "generic %x\n", revents);	1306	fprintf (stderr, "generic %x\n", revents);
		1307
748	}	1308	}
749		1309
750	int main (void)	1310	int main (void)
751	{	1311	{
752	struct ev_io sin;
753
754	ev_init (0);	1312	ev_init (0);
755		1313
756	evw_init (&sin, sin_cb, 55);
757	evio_set (&sin, 0, EV_READ);	1314	ev_io_init (&wio, sin_cb, 0, EV_READ);
758	evio_start (&sin);	1315	ev_io_start (&wio);
759		1316
760	struct ev_timer t[10000];	1317	struct ev_timer t[10000];
761		1318
762	#if 0	1319	#if 0
763	int i;	1320	int i;
764	for (i = 0; i < 10000; ++i)	1321	for (i = 0; i < 10000; ++i)
765	{	1322	{
766	struct ev_timer *w = t + i;	1323	struct ev_timer *w = t + i;
767	evw_init (w, ocb, i);	1324	ev_watcher_init (w, ocb, i);
768	evtimer_set_abs (w, drand48 (), 0.99775533);	1325	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
769	evtimer_start (w);	1326	ev_timer_start (w);
770	if (drand48 () < 0.5)	1327	if (drand48 () < 0.5)
771	evtimer_stop (w);	1328	ev_timer_stop (w);
772	}	1329	}
773	#endif	1330	#endif
774		1331
775	struct ev_timer t1;	1332	struct ev_timer t1;
776	evw_init (&t1, ocb, 0);	1333	ev_timer_init (&t1, ocb, 5, 10);
777	evtimer_set_abs (&t1, 5, 10);
778	evtimer_start (&t1);	1334	ev_timer_start (&t1);
779		1335
780	struct ev_signal sig;	1336	struct ev_signal sig;
781	evw_init (&sig, scb, 65535);
782	evsignal_set (&sig, SIGQUIT);	1337	ev_signal_init (&sig, scb, SIGQUIT);
783	evsignal_start (&sig);	1338	ev_signal_start (&sig);
784		1339
785	struct ev_check cw;	1340	struct ev_check cw;
786	evw_init (&cw, gcb, 0);	1341	ev_check_init (&cw, gcb);
787	evcheck_start (&cw);	1342	ev_check_start (&cw);
788		1343
789	struct ev_idle iw;	1344	struct ev_idle iw;
790	evw_init (&iw, gcb, 0);	1345	ev_idle_init (&iw, gcb);
791	evidle_start (&iw);	1346	ev_idle_start (&iw);
792		1347
793	ev_loop (0);	1348	ev_loop (0);
794		1349
795	return 0;	1350	return 0;
796	}	1351	}

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