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Comparing libev/ev.c (file contents):
Revision 1.19 by root, Wed Oct 31 17:55:55 2007 UTC vs.
Revision 1.55 by root, Sun Nov 4 00:39:24 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
		31	#ifndef EV_STANDALONE
		32	# include "config.h"
		33	#endif
29		34
30	#include <math.h>	35	#include <math.h>
31	#include <stdlib.h>	36	#include <stdlib.h>
32	#include <unistd.h>	37	#include <unistd.h>
33	#include <fcntl.h>	38	#include <fcntl.h>
…		…
36		41
37	#include <stdio.h>	42	#include <stdio.h>
38		43
39	#include <assert.h>	44	#include <assert.h>
40	#include <errno.h>	45	#include <errno.h>
		46	#include <sys/types.h>
		47	#ifndef WIN32
		48	# include <sys/wait.h>
		49	#endif
41	#include <sys/time.h>	50	#include <sys/time.h>
42	#include <time.h>	51	#include <time.h>
43		52
		53	/**/
		54
44	#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
45	# ifdef CLOCK_MONOTONIC	81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
46	# define HAVE_MONOTONIC 1	83	# define EV_USE_MONOTONIC 0
47	# endif	84	#endif
48	#endif
49		85
50	#ifndef HAVE_SELECT
51	# define HAVE_SELECT 1
52	#endif
53
54	#ifndef HAVE_EPOLL
55	# define HAVE_EPOLL 0
56	#endif
57
58	#ifndef HAVE_REALTIME	86	#ifndef CLOCK_REALTIME
59	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
60	#endif	89	#endif
		90
		91	/**/
61		92
62	#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) */
63	#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 */
64		97
65	#include "ev.h"	98	#include "ev.h"
		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)
66		113
67	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
68	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
69	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
70		117
71	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
72	ev_tstamp ev_now;
73	int ev_method;
74
75	static int have_monotonic; /* runtime */
76
77	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
78	static void (*method_modify)(int fd, int oev, int nev);
79	static void (*method_poll)(ev_tstamp timeout);
80		119
81	/*****************************************************************************/	120	/*****************************************************************************/
82		121
83	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
84	ev_time (void)	156	ev_time (void)
85	{	157	{
86	#if HAVE_REALTIME	158	#if EV_USE_REALTIME
87	struct timespec ts;	159	struct timespec ts;
88	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
89	return ts.tv_sec + ts.tv_nsec * 1e-9;	161	return ts.tv_sec + ts.tv_nsec * 1e-9;
90	#else	162	#else
91	struct timeval tv;	163	struct timeval tv;
92	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
93	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
94	#endif	166	#endif
95	}	167	}
96		168
97	static ev_tstamp	169	inline ev_tstamp
98	get_clock (void)	170	get_clock (void)
99	{	171	{
100	#if HAVE_MONOTONIC	172	#if EV_USE_MONOTONIC
101	if (have_monotonic)	173	if (expect_true (have_monotonic))
102	{	174	{
103	struct timespec ts;	175	struct timespec ts;
104	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
105	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
106	}	178	}
107	#endif	179	#endif
108		180
109	return ev_time ();	181	return ev_time ();
110	}	182	}
111		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
112	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
113	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
114	{ \	194	{ \
115	int newcnt = cur ? cur << 1 : 16; \	195	int newcnt = cur; \
		196	do \
		197	{ \
		198	newcnt = array_roundsize (base, newcnt << 1); \
		199	} \
		200	while ((cnt) > newcnt); \
		201	\
116	base = realloc (base, sizeof (*base) * (newcnt)); \	202	base = realloc (base, sizeof (*base) * (newcnt)); \
117	init (base + cur, newcnt - cur); \	203	init (base + cur, newcnt - cur); \
118	cur = newcnt; \	204	cur = newcnt; \
119	}	205	}
120		206
121	/*****************************************************************************/	207	/*****************************************************************************/
122		208
123	typedef struct
124	{
125	struct ev_io *head;
126	unsigned char wev, rev; /* want, received event set */
127	} ANFD;
128
129	static ANFD *anfds;
130	static int anfdmax;
131
132	static int *fdchanges;
133	static int fdchangemax, fdchangecnt;
134
135	static void	209	static void
136	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
137	{	211	{
138	while (count--)	212	while (count--)
139	{	213	{
140	base->head = 0;	214	base->head = 0;
141	base->wev = base->rev = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
142	++base;	218	++base;
143	}	219	}
144	}	220	}
145		221
146	typedef struct
147	{
148	W w;
149	int events;
150	} ANPENDING;
151
152	static ANPENDING *pendings;
153	static int pendingmax, pendingcnt;
154
155	static void	222	static void
156	event (W w, int events)	223	event (EV_P_ W w, int events)
157	{	224	{
158	if (w->active)	225	if (w->pending)
159	{	226	{
160	w->pending = ++pendingcnt;
161	array_needsize (pendings, pendingmax, pendingcnt, );
162	pendings [pendingcnt - 1].w = w;
163	pendings [pendingcnt - 1].events = events;	227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
164	}	229	}
165	}
166		230
		231	w->pending = ++pendingcnt [ABSPRI (w)];
		232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		233	pendings [ABSPRI (w)][w->pending - 1].w = w;
		234	pendings [ABSPRI (w)][w->pending - 1].events = events;
		235	}
		236
167	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
168	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
169	{	248	{
170	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
171	struct ev_io *w;	250	struct ev_io *w;
172		251
173	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
174	{	253	{
175	int ev = w->events & events;	254	int ev = w->events & events;
176		255
177	if (ev)	256	if (ev)
178	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
179	}	258	}
180	}	259	}
181		260
		261	/*****************************************************************************/
		262
182	static void	263	static void
183	queue_events (W *events, int eventcnt, int type)	264	fd_reify (EV_P)
184	{	265	{
185	int i;	266	int i;
186		267
187	for (i = 0; i < eventcnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
188	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	}
189	}	314	}
190		315
191	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
192	static void	317	static void
193	fd_recheck ()	318	fd_ebadf (EV_P)
194	{	319	{
195	int fd;	320	int fd;
196		321
197	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
198	if (anfds [fd].wev)	323	if (anfds [fd].events)
199	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
200	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
201	evio_stop (anfds [fd].head);	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	}
202	}	341	}
203		342
204	/*****************************************************************************/	343	/*****************************************************************************/
205		344
206	static struct ev_timer **timers;
207	static int timermax, timercnt;
208
209	static struct ev_periodic **periodics;
210	static int periodicmax, periodiccnt;
211
212	static void	345	static void
213	upheap (WT *timers, int k)	346	upheap (WT *heap, int k)
214	{	347	{
215	WT w = timers [k];	348	WT w = heap [k];
216		349
217	while (k && timers [k >> 1]->at > w->at)	350	while (k && heap [k >> 1]->at > w->at)
218	{	351	{
219	timers [k] = timers [k >> 1];	352	heap [k] = heap [k >> 1];
220	timers [k]->active = k + 1;	353	heap [k]->active = k + 1;
221	k >>= 1;	354	k >>= 1;
222	}	355	}
223		356
224	timers [k] = w;	357	heap [k] = w;
225	timers [k]->active = k + 1;	358	heap [k]->active = k + 1;
226		359
227	}	360	}
228		361
229	static void	362	static void
230	downheap (WT *timers, int N, int k)	363	downheap (WT *heap, int N, int k)
231	{	364	{
232	WT w = timers [k];	365	WT w = heap [k];
233		366
234	while (k < (N >> 1))	367	while (k < (N >> 1))
235	{	368	{
236	int j = k << 1;	369	int j = k << 1;
237		370
238	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	371	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
239	++j;	372	++j;
240		373
241	if (w->at <= timers [j]->at)	374	if (w->at <= heap [j]->at)
242	break;	375	break;
243		376
244	timers [k] = timers [j];	377	heap [k] = heap [j];
245	timers [k]->active = k + 1;	378	heap [k]->active = k + 1;
246	k = j;	379	k = j;
247	}	380	}
248		381
249	timers [k] = w;	382	heap [k] = w;
250	timers [k]->active = k + 1;	383	heap [k]->active = k + 1;
251	}	384	}
252		385
253	/*****************************************************************************/	386	/*****************************************************************************/
254		387
255	typedef struct	388	typedef struct
256	{	389	{
257	struct ev_signal *head;	390	struct ev_watcher_list *head;
258	sig_atomic_t gotsig;	391	sig_atomic_t volatile gotsig;
259	} ANSIG;	392	} ANSIG;
260		393
261	static ANSIG *signals;	394	static ANSIG *signals;
262	static int signalmax;	395	static int signalmax;
263		396
264	static int sigpipe [2];	397	static int sigpipe [2];
265	static sig_atomic_t gotsig;	398	static sig_atomic_t volatile gotsig;
266	static struct ev_io sigev;
267		399
268	static void	400	static void
269	signals_init (ANSIG *base, int count)	401	signals_init (ANSIG *base, int count)
270	{	402	{
271	while (count--)	403	while (count--)
272	{	404	{
273	base->head = 0;	405	base->head = 0;
274	base->gotsig = 0;	406	base->gotsig = 0;
		407
275	++base;	408	++base;
276	}	409	}
277	}	410	}
278		411
279	static void	412	static void
…		…
281	{	414	{
282	signals [signum - 1].gotsig = 1;	415	signals [signum - 1].gotsig = 1;
283		416
284	if (!gotsig)	417	if (!gotsig)
285	{	418	{
		419	int old_errno = errno;
286	gotsig = 1;	420	gotsig = 1;
287	write (sigpipe [1], &gotsig, 1);	421	write (sigpipe [1], &signum, 1);
		422	errno = old_errno;
288	}	423	}
289	}	424	}
290		425
291	static void	426	static void
292	sigcb (struct ev_io *iow, int revents)	427	sigcb (EV_P_ struct ev_io *iow, int revents)
293	{	428	{
294	struct ev_signal *w;	429	struct ev_watcher_list *w;
295	int sig;	430	int signum;
296		431
		432	read (sigpipe [0], &revents, 1);
297	gotsig = 0;	433	gotsig = 0;
298	read (sigpipe [0], &revents, 1);
299		434
300	for (sig = signalmax; sig--; )	435	for (signum = signalmax; signum--; )
301	if (signals [sig].gotsig)	436	if (signals [signum].gotsig)
302	{	437	{
303	signals [sig].gotsig = 0;	438	signals [signum].gotsig = 0;
304		439
305	for (w = signals [sig].head; w; w = w->next)	440	for (w = signals [signum].head; w; w = w->next)
306	event ((W)w, EV_SIGNAL);	441	event (EV_A_ (W)w, EV_SIGNAL);
307	}	442	}
308	}	443	}
309		444
310	static void	445	static void
311	siginit (void)	446	siginit (EV_P)
312	{	447	{
		448	#ifndef WIN32
313	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	449	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
314	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	450	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
315		451
316	/* rather than sort out wether we really need nb, set it */	452	/* rather than sort out wether we really need nb, set it */
317	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	453	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
318	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	454	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		455	#endif
319		456
320	evio_set (&sigev, sigpipe [0], EV_READ);	457	ev_io_set (&sigev, sigpipe [0], EV_READ);
321	evio_start (&sigev);	458	ev_io_start (EV_A_ &sigev);
		459	ev_unref (EV_A); /* child watcher should not keep loop alive */
322	}	460	}
323		461
324	/*****************************************************************************/	462	/*****************************************************************************/
325		463
326	static struct ev_idle **idles;	464	#ifndef WIN32
327	static int idlemax, idlecnt;
328		465
329	static struct ev_check **checks;	466	#ifndef WCONTINUED
330	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
331		501
332	/*****************************************************************************/	502	/*****************************************************************************/
333		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
334	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
335	# include "ev_epoll.c"	508	# include "ev_epoll.c"
336	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
337	#if HAVE_SELECT	513	#if EV_USE_SELECT
338	# include "ev_select.c"	514	# include "ev_select.c"
339	#endif	515	#endif
340		516
341	int ev_init (int flags)	517	int
		518	ev_version_major (void)
342	{	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	{
343	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
344	{	553	{
345	struct timespec ts;	554	struct timespec ts;
346	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
347	have_monotonic = 1;	556	have_monotonic = 1;
348	}	557	}
349	#endif	558	#endif
350		559
351	ev_now = ev_time ();	560	rt_now = ev_time ();
352	now = get_clock ();	561	mn_now = get_clock ();
353	diff = ev_now - now;	562	now_floor = mn_now;
		563	rtmn_diff = rt_now - mn_now;
354		564
355	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
356	return 0;	618	return 0;
357
358	ev_method = EVMETHOD_NONE;
359	#if HAVE_EPOLL
360	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
361	#endif
362	#if HAVE_SELECT
363	if (ev_method == EVMETHOD_NONE) select_init (flags);
364	#endif
365
366	if (ev_method)
367	{
368	evw_init (&sigev, sigcb);
369	siginit ();
370	}
371
372	return ev_method;
373	}	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
374		637
375	/*****************************************************************************/	638	/*****************************************************************************/
376		639
377	void ev_prefork (void)	640	void
		641	ev_fork_prepare (void)
378	{	642	{
379	/* nop */	643	/* nop */
380	}	644	}
381		645
		646	void
382	void ev_postfork_parent (void)	647	ev_fork_parent (void)
383	{	648	{
384	/* nop */	649	/* nop */
385	}	650	}
386		651
		652	void
387	void ev_postfork_child (void)	653	ev_fork_child (void)
388	{	654	{
		655	/*TODO*/
		656	#if !EV_MULTIPLICITY
389	#if HAVE_EPOLL	657	#if EV_USE_EPOLL
390	if (ev_method == EVMETHOD_EPOLL)	658	if (method == EVMETHOD_EPOLL)
391	epoll_postfork_child ();	659	epoll_postfork_child (EV_A);
392	#endif	660	#endif
393		661
394	evio_stop (&sigev);	662	ev_io_stop (EV_A_ &sigev);
395	close (sigpipe [0]);	663	close (sigpipe [0]);
396	close (sigpipe [1]);	664	close (sigpipe [1]);
397	pipe (sigpipe);	665	pipe (sigpipe);
398	siginit ();	666	siginit (EV_A);
		667	#endif
399	}	668	}
400		669
401	/*****************************************************************************/	670	/*****************************************************************************/
402		671
403	static void	672	static void
404	fd_reify (void)	673	call_pending (EV_P)
405	{	674	{
406	int i;	675	int pri;
407		676
408	for (i = 0; i < fdchangecnt; ++i)	677	for (pri = NUMPRI; pri--; )
409	{	678	while (pendingcnt [pri])
410	int fd = fdchanges [i];
411	ANFD *anfd = anfds + fd;
412	struct ev_io *w;
413
414	int wev = 0;
415
416	for (w = anfd->head; w; w = w->next)
417	wev |= w->events;
418
419	if (anfd->wev != wev)
420	{	679	{
421	method_modify (fd, anfd->wev, wev);
422	anfd->wev = wev;
423	}
424	}
425
426	fdchangecnt = 0;
427	}
428
429	static void
430	call_pending ()
431	{
432	while (pendingcnt)
433	{
434	ANPENDING *p = pendings + --pendingcnt;	680	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
435		681
436	if (p->w)	682	if (p->w)
437	{	683	{
438	p->w->pending = 0;	684	p->w->pending = 0;
439	p->w->cb (p->w, p->events);	685	p->w->cb (EV_A_ p->w, p->events);
440	}	686	}
441	}	687	}
442	}	688	}
443		689
444	static void	690	static void
445	timers_reify ()	691	timers_reify (EV_P)
446	{	692	{
447	while (timercnt && timers [0]->at <= now)	693	while (timercnt && timers [0]->at <= mn_now)
448	{	694	{
449	struct ev_timer *w = timers [0];	695	struct ev_timer *w = timers [0];
450
451	event ((W)w, EV_TIMEOUT);
452		696
453	/* first reschedule or stop timer */	697	/* first reschedule or stop timer */
454	if (w->repeat)	698	if (w->repeat)
455	{	699	{
		700	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
456	w->at = now + w->repeat;	701	w->at = mn_now + w->repeat;
457	assert (("timer timeout in the past, negative repeat?", w->at > now));
458	downheap ((WT *)timers, timercnt, 0);	702	downheap ((WT *)timers, timercnt, 0);
459	}	703	}
460	else	704	else
461	evtimer_stop (w); /* nonrepeating: stop timer */	705	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
462	}
463	}
464		706
		707	event (EV_A_ (W)w, EV_TIMEOUT);
		708	}
		709	}
		710
465	static void	711	static void
466	periodics_reify ()	712	periodics_reify (EV_P)
467	{	713	{
468	while (periodiccnt && periodics [0]->at <= ev_now)	714	while (periodiccnt && periodics [0]->at <= rt_now)
469	{	715	{
470	struct ev_periodic *w = periodics [0];	716	struct ev_periodic *w = periodics [0];
471		717
472	/* first reschedule or stop timer */	718	/* first reschedule or stop timer */
473	if (w->interval)	719	if (w->interval)
474	{	720	{
475	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;
476	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));
477	downheap ((WT *)periodics, periodiccnt, 0);	723	downheap ((WT *)periodics, periodiccnt, 0);
478	}	724	}
479	else	725	else
480	evperiodic_stop (w); /* nonrepeating: stop timer */	726	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
481		727
482	event ((W)w, EV_TIMEOUT);	728	event (EV_A_ (W)w, EV_PERIODIC);
483	}	729	}
484	}	730	}
485		731
486	static void	732	static void
487	periodics_reschedule (ev_tstamp diff)	733	periodics_reschedule (EV_P)
488	{	734	{
489	int i;	735	int i;
490		736
491	/* adjust periodics after time jump */	737	/* adjust periodics after time jump */
492	for (i = 0; i < periodiccnt; ++i)	738	for (i = 0; i < periodiccnt; ++i)
493	{	739	{
494	struct ev_periodic *w = periodics [i];	740	struct ev_periodic *w = periodics [i];
495		741
496	if (w->interval)	742	if (w->interval)
497	{	743	{
498	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;
499		745
500	if (fabs (diff) >= 1e-4)	746	if (fabs (diff) >= 1e-4)
501	{	747	{
502	evperiodic_stop (w);	748	ev_periodic_stop (EV_A_ w);
503	evperiodic_start (w);	749	ev_periodic_start (EV_A_ w);
504		750
505	i = 0; /* restart loop, inefficient, but time jumps should be rare */	751	i = 0; /* restart loop, inefficient, but time jumps should be rare */
506	}	752	}
507	}	753	}
508	}	754	}
509	}	755	}
510		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
511	static void	775	static void
512	time_update ()	776	time_update (EV_P)
513	{	777	{
514	int i;	778	int i;
515		779
516	ev_now = ev_time ();	780	#if EV_USE_MONOTONIC
517
518	if (have_monotonic)	781	if (expect_true (have_monotonic))
519	{	782	{
520	ev_tstamp odiff = diff;	783	if (time_update_monotonic (EV_A))
521
522	for (i = 4; --i; ) /* loop a few times, before making important decisions */
523	{	784	{
524	now = get_clock ();	785	ev_tstamp odiff = rtmn_diff;
		786
		787	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		788	{
525	diff = ev_now - now;	789	rtmn_diff = rt_now - mn_now;
526		790
527	if (fabs (odiff - diff) < MIN_TIMEJUMP)	791	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
528	return; /* all is well */	792	return; /* all is well */
529		793
530	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) */
531	}	802	}
532
533	periodics_reschedule (diff - odiff);
534	/* no timer adjustment, as the monotonic clock doesn't jump */
535	}	803	}
536	else	804	else
		805	#endif
537	{	806	{
538	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	807	rt_now = ev_time ();
		808
		809	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
539	{	810	{
540	periodics_reschedule (ev_now - now);	811	periodics_reschedule (EV_A);
541		812
542	/* adjust timers. this is easy, as the offset is the same for all */	813	/* adjust timers. this is easy, as the offset is the same for all */
543	for (i = 0; i < timercnt; ++i)	814	for (i = 0; i < timercnt; ++i)
544	timers [i]->at += diff;	815	timers [i]->at += rt_now - mn_now;
545	}	816	}
546		817
547	now = ev_now;	818	mn_now = rt_now;
548	}	819	}
549	}	820	}
550		821
551	int ev_loop_done;	822	void
		823	ev_ref (EV_P)
		824	{
		825	++activecnt;
		826	}
552		827
		828	void
		829	ev_unref (EV_P)
		830	{
		831	--activecnt;
		832	}
		833
		834	static int loop_done;
		835
		836	void
553	void ev_loop (int flags)	837	ev_loop (EV_P_ int flags)
554	{	838	{
555	double block;	839	double block;
556	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	840	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
557
558	if (checkcnt)
559	{
560	queue_events ((W *)checks, checkcnt, EV_CHECK);
561	call_pending ();
562	}
563		841
564	do	842	do
565	{	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
566	/* update fd-related kernel structures */	851	/* update fd-related kernel structures */
567	fd_reify ();	852	fd_reify (EV_A);
568		853
569	/* calculate blocking time */	854	/* calculate blocking time */
570		855
571	/* 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	{
572	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = rt_now;
		866	}
573		867
574	if (flags & EVLOOP_NONBLOCK || idlecnt)	868	if (flags & EVLOOP_NONBLOCK || idlecnt)
575	block = 0.;	869	block = 0.;
576	else	870	else
577	{	871	{
578	block = MAX_BLOCKTIME;	872	block = MAX_BLOCKTIME;
579		873
580	if (timercnt)	874	if (timercnt)
581	{	875	{
582	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	876	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
583	if (block > to) block = to;	877	if (block > to) block = to;
584	}	878	}
585		879
586	if (periodiccnt)	880	if (periodiccnt)
587	{	881	{
588	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	882	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
589	if (block > to) block = to;	883	if (block > to) block = to;
590	}	884	}
591		885
592	if (block < 0.) block = 0.;	886	if (block < 0.) block = 0.;
593	}	887	}
594		888
595	method_poll (block);	889	method_poll (EV_A_ block);
596		890
597	/* update ev_now, do magic */	891	/* update rt_now, do magic */
598	time_update ();	892	time_update (EV_A);
599		893
600	/* queue pending timers and reschedule them */	894	/* queue pending timers and reschedule them */
		895	timers_reify (EV_A); /* relative timers called last */
601	periodics_reify (); /* absolute timers first */	896	periodics_reify (EV_A); /* absolute timers called first */
602	timers_reify (); /* relative timers second */
603		897
604	/* queue idle watchers unless io or timers are pending */	898	/* queue idle watchers unless io or timers are pending */
605	if (!pendingcnt)	899	if (!pendingcnt)
606	queue_events ((W *)idles, idlecnt, EV_IDLE);	900	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
607		901
608	/* queue check and possibly idle watchers */	902	/* queue check watchers, to be executed first */
		903	if (checkcnt)
609	queue_events ((W *)checks, checkcnt, EV_CHECK);	904	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
610		905
611	call_pending ();	906	call_pending (EV_A);
612	}	907	}
613	while (!ev_loop_done);	908	while (activecnt && !loop_done);
614		909
615	if (ev_loop_done != 2)	910	if (loop_done != 2)
616	ev_loop_done = 0;	911	loop_done = 0;
		912	}
		913
		914	void
		915	ev_unloop (EV_P_ int how)
		916	{
		917	loop_done = how;
617	}	918	}
618		919
619	/*****************************************************************************/	920	/*****************************************************************************/
620		921
621	static void	922	inline void
622	wlist_add (WL *head, WL elem)	923	wlist_add (WL *head, WL elem)
623	{	924	{
624	elem->next = *head;	925	elem->next = *head;
625	*head = elem;	926	*head = elem;
626	}	927	}
627		928
628	static void	929	inline void
629	wlist_del (WL *head, WL elem)	930	wlist_del (WL *head, WL elem)
630	{	931	{
631	while (*head)	932	while (*head)
632	{	933	{
633	if (*head == elem)	934	if (*head == elem)
…		…
638		939
639	head = &(*head)->next;	940	head = &(*head)->next;
640	}	941	}
641	}	942	}
642		943
643	static void	944	inline void
644	ev_clear (W w)	945	ev_clear_pending (EV_P_ W w)
645	{	946	{
646	if (w->pending)	947	if (w->pending)
647	{	948	{
648	pendings [w->pending - 1].w = 0;	949	pendings [ABSPRI (w)][w->pending - 1].w = 0;
649	w->pending = 0;	950	w->pending = 0;
650	}	951	}
651	}	952	}
652		953
653	static void	954	inline void
654	ev_start (W w, int active)	955	ev_start (EV_P_ W w, int active)
655	{	956	{
		957	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		958	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		959
656	w->active = active;	960	w->active = active;
		961	ev_ref (EV_A);
657	}	962	}
658		963
659	static void	964	inline void
660	ev_stop (W w)	965	ev_stop (EV_P_ W w)
661	{	966	{
		967	ev_unref (EV_A);
662	w->active = 0;	968	w->active = 0;
663	}	969	}
664		970
665	/*****************************************************************************/	971	/*****************************************************************************/
666		972
667	void	973	void
668	evio_start (struct ev_io *w)	974	ev_io_start (EV_P_ struct ev_io *w)
669	{	975	{
		976	int fd = w->fd;
		977
670	if (ev_is_active (w))	978	if (ev_is_active (w))
671	return;	979	return;
672		980
673	int fd = w->fd;	981	assert (("ev_io_start called with negative fd", fd >= 0));
674		982
675	ev_start ((W)w, 1);	983	ev_start (EV_A_ (W)w, 1);
676	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	984	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
677	wlist_add ((WL *)&anfds[fd].head, (WL)w);	985	wlist_add ((WL *)&anfds[fd].head, (WL)w);
678		986
679	++fdchangecnt;	987	fd_change (EV_A_ fd);
680	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
681	fdchanges [fdchangecnt - 1] = fd;
682	}	988	}
683		989
684	void	990	void
685	evio_stop (struct ev_io *w)	991	ev_io_stop (EV_P_ struct ev_io *w)
686	{	992	{
687	ev_clear ((W)w);	993	ev_clear_pending (EV_A_ (W)w);
688	if (!ev_is_active (w))	994	if (!ev_is_active (w))
689	return;	995	return;
690		996
691	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	997	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
692	ev_stop ((W)w);	998	ev_stop (EV_A_ (W)w);
693		999
694	++fdchangecnt;	1000	fd_change (EV_A_ w->fd);
695	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
696	fdchanges [fdchangecnt - 1] = w->fd;
697	}	1001	}
698		1002
699	void	1003	void
700	evtimer_start (struct ev_timer *w)	1004	ev_timer_start (EV_P_ struct ev_timer *w)
701	{	1005	{
702	if (ev_is_active (w))	1006	if (ev_is_active (w))
703	return;	1007	return;
704		1008
705	w->at += now;	1009	w->at += mn_now;
706		1010
707	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1011	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
708		1012
709	ev_start ((W)w, ++timercnt);	1013	ev_start (EV_A_ (W)w, ++timercnt);
710	array_needsize (timers, timermax, timercnt, );	1014	array_needsize (timers, timermax, timercnt, );
711	timers [timercnt - 1] = w;	1015	timers [timercnt - 1] = w;
712	upheap ((WT *)timers, timercnt - 1);	1016	upheap ((WT *)timers, timercnt - 1);
713	}	1017	}
714		1018
715	void	1019	void
716	evtimer_stop (struct ev_timer *w)	1020	ev_timer_stop (EV_P_ struct ev_timer *w)
717	{	1021	{
718	ev_clear ((W)w);	1022	ev_clear_pending (EV_A_ (W)w);
719	if (!ev_is_active (w))	1023	if (!ev_is_active (w))
720	return;	1024	return;
721		1025
722	if (w->active < timercnt--)	1026	if (w->active < timercnt--)
723	{	1027	{
…		…
725	downheap ((WT *)timers, timercnt, w->active - 1);	1029	downheap ((WT *)timers, timercnt, w->active - 1);
726	}	1030	}
727		1031
728	w->at = w->repeat;	1032	w->at = w->repeat;
729		1033
730	ev_stop ((W)w);	1034	ev_stop (EV_A_ (W)w);
731	}	1035	}
732		1036
733	void	1037	void
734	evtimer_again (struct ev_timer *w)	1038	ev_timer_again (EV_P_ struct ev_timer *w)
735	{	1039	{
736	if (ev_is_active (w))	1040	if (ev_is_active (w))
737	{	1041	{
738	if (w->repeat)	1042	if (w->repeat)
739	{	1043	{
740	w->at = now + w->repeat;	1044	w->at = mn_now + w->repeat;
741	downheap ((WT *)timers, timercnt, w->active - 1);	1045	downheap ((WT *)timers, timercnt, w->active - 1);
742	}	1046	}
743	else	1047	else
744	evtimer_stop (w);	1048	ev_timer_stop (EV_A_ w);
745	}	1049	}
746	else if (w->repeat)	1050	else if (w->repeat)
747	evtimer_start (w);	1051	ev_timer_start (EV_A_ w);
748	}	1052	}
749		1053
750	void	1054	void
751	evperiodic_start (struct ev_periodic *w)	1055	ev_periodic_start (EV_P_ struct ev_periodic *w)
752	{	1056	{
753	if (ev_is_active (w))	1057	if (ev_is_active (w))
754	return;	1058	return;
755		1059
756	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1060	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
757		1061
758	/* 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 */
759	if (w->interval)	1063	if (w->interval)
760	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1064	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
761		1065
762	ev_start ((W)w, ++periodiccnt);	1066	ev_start (EV_A_ (W)w, ++periodiccnt);
763	array_needsize (periodics, periodicmax, periodiccnt, );	1067	array_needsize (periodics, periodicmax, periodiccnt, );
764	periodics [periodiccnt - 1] = w;	1068	periodics [periodiccnt - 1] = w;
765	upheap ((WT *)periodics, periodiccnt - 1);	1069	upheap ((WT *)periodics, periodiccnt - 1);
766	}	1070	}
767		1071
768	void	1072	void
769	evperiodic_stop (struct ev_periodic *w)	1073	ev_periodic_stop (EV_P_ struct ev_periodic *w)
770	{	1074	{
771	ev_clear ((W)w);	1075	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1076	if (!ev_is_active (w))
773	return;	1077	return;
774		1078
775	if (w->active < periodiccnt--)	1079	if (w->active < periodiccnt--)
776	{	1080	{
777	periodics [w->active - 1] = periodics [periodiccnt];	1081	periodics [w->active - 1] = periodics [periodiccnt];
778	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1082	downheap ((WT *)periodics, periodiccnt, w->active - 1);
779	}	1083	}
780		1084
781	ev_stop ((W)w);	1085	ev_stop (EV_A_ (W)w);
782	}	1086	}
783		1087
		1088	#ifndef SA_RESTART
		1089	# define SA_RESTART 0
		1090	#endif
		1091
784	void	1092	void
785	evsignal_start (struct ev_signal *w)	1093	ev_signal_start (EV_P_ struct ev_signal *w)
786	{	1094	{
787	if (ev_is_active (w))	1095	if (ev_is_active (w))
788	return;	1096	return;
789		1097
		1098	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1099
790	ev_start ((W)w, 1);	1100	ev_start (EV_A_ (W)w, 1);
791	array_needsize (signals, signalmax, w->signum, signals_init);	1101	array_needsize (signals, signalmax, w->signum, signals_init);
792	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1102	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
793		1103
794	if (!w->next)	1104	if (!w->next)
795	{	1105	{
796	struct sigaction sa;	1106	struct sigaction sa;
797	sa.sa_handler = sighandler;	1107	sa.sa_handler = sighandler;
798	sigfillset (&sa.sa_mask);	1108	sigfillset (&sa.sa_mask);
799	sa.sa_flags = 0;	1109	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
800	sigaction (w->signum, &sa, 0);	1110	sigaction (w->signum, &sa, 0);
801	}	1111	}
802	}	1112	}
803		1113
804	void	1114	void
805	evsignal_stop (struct ev_signal *w)	1115	ev_signal_stop (EV_P_ struct ev_signal *w)
806	{	1116	{
807	ev_clear ((W)w);	1117	ev_clear_pending (EV_A_ (W)w);
808	if (!ev_is_active (w))	1118	if (!ev_is_active (w))
809	return;	1119	return;
810		1120
811	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1121	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
812	ev_stop ((W)w);	1122	ev_stop (EV_A_ (W)w);
813		1123
814	if (!signals [w->signum - 1].head)	1124	if (!signals [w->signum - 1].head)
815	signal (w->signum, SIG_DFL);	1125	signal (w->signum, SIG_DFL);
816	}	1126	}
817		1127
		1128	void
818	void evidle_start (struct ev_idle *w)	1129	ev_idle_start (EV_P_ struct ev_idle *w)
819	{	1130	{
820	if (ev_is_active (w))	1131	if (ev_is_active (w))
821	return;	1132	return;
822		1133
823	ev_start ((W)w, ++idlecnt);	1134	ev_start (EV_A_ (W)w, ++idlecnt);
824	array_needsize (idles, idlemax, idlecnt, );	1135	array_needsize (idles, idlemax, idlecnt, );
825	idles [idlecnt - 1] = w;	1136	idles [idlecnt - 1] = w;
826	}	1137	}
827		1138
		1139	void
828	void evidle_stop (struct ev_idle *w)	1140	ev_idle_stop (EV_P_ struct ev_idle *w)
829	{	1141	{
830	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
831	if (ev_is_active (w))	1143	if (ev_is_active (w))
832	return;	1144	return;
833		1145
834	idles [w->active - 1] = idles [--idlecnt];	1146	idles [w->active - 1] = idles [--idlecnt];
835	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
836	}	1148	}
837		1149
838	void evcheck_start (struct ev_check *w)	1150	void
		1151	ev_prepare_start (EV_P_ struct ev_prepare *w)
839	{	1152	{
840	if (ev_is_active (w))	1153	if (ev_is_active (w))
841	return;	1154	return;
842		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
843	ev_start ((W)w, ++checkcnt);	1178	ev_start (EV_A_ (W)w, ++checkcnt);
844	array_needsize (checks, checkmax, checkcnt, );	1179	array_needsize (checks, checkmax, checkcnt, );
845	checks [checkcnt - 1] = w;	1180	checks [checkcnt - 1] = w;
846	}	1181	}
847		1182
		1183	void
848	void evcheck_stop (struct ev_check *w)	1184	ev_check_stop (EV_P_ struct ev_check *w)
849	{	1185	{
850	ev_clear ((W)w);	1186	ev_clear_pending (EV_A_ (W)w);
851	if (ev_is_active (w))	1187	if (ev_is_active (w))
852	return;	1188	return;
853		1189
854	checks [w->active - 1] = checks [--checkcnt];	1190	checks [w->active - 1] = checks [--checkcnt];
855	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);
856	}	1213	}
857		1214
858	/*****************************************************************************/	1215	/*****************************************************************************/
859		1216
860	struct ev_once	1217	struct ev_once
…		…
864	void (*cb)(int revents, void *arg);	1221	void (*cb)(int revents, void *arg);
865	void *arg;	1222	void *arg;
866	};	1223	};
867		1224
868	static void	1225	static void
869	once_cb (struct ev_once *once, int revents)	1226	once_cb (EV_P_ struct ev_once *once, int revents)
870	{	1227	{
871	void (*cb)(int revents, void *arg) = once->cb;	1228	void (*cb)(int revents, void *arg) = once->cb;
872	void *arg = once->arg;	1229	void *arg = once->arg;
873		1230
874	evio_stop (&once->io);	1231	ev_io_stop (EV_A_ &once->io);
875	evtimer_stop (&once->to);	1232	ev_timer_stop (EV_A_ &once->to);
876	free (once);	1233	free (once);
877		1234
878	cb (revents, arg);	1235	cb (revents, arg);
879	}	1236	}
880		1237
881	static void	1238	static void
882	once_cb_io (struct ev_io *w, int revents)	1239	once_cb_io (EV_P_ struct ev_io *w, int revents)
883	{	1240	{
884	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1241	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
885	}	1242	}
886		1243
887	static void	1244	static void
888	once_cb_to (struct ev_timer *w, int revents)	1245	once_cb_to (EV_P_ struct ev_timer *w, int revents)
889	{	1246	{
890	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1247	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
891	}	1248	}
892		1249
893	void	1250	void
894	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1251	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
895	{	1252	{
896	struct ev_once *once = malloc (sizeof (struct ev_once));	1253	struct ev_once *once = malloc (sizeof (struct ev_once));
897		1254
898	if (!once)	1255	if (!once)
899	cb (EV_ERROR, arg);	1256	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
900	else	1257	else
901	{	1258	{
902	once->cb = cb;	1259	once->cb = cb;
903	once->arg = arg;	1260	once->arg = arg;
904		1261
905	evw_init (&once->io, once_cb_io);	1262	ev_watcher_init (&once->io, once_cb_io);
906
907	if (fd >= 0)	1263	if (fd >= 0)
908	{	1264	{
909	evio_set (&once->io, fd, events);	1265	ev_io_set (&once->io, fd, events);
910	evio_start (&once->io);	1266	ev_io_start (EV_A_ &once->io);
911	}	1267	}
912		1268
913	evw_init (&once->to, once_cb_to);	1269	ev_watcher_init (&once->to, once_cb_to);
914
915	if (timeout >= 0.)	1270	if (timeout >= 0.)
916	{	1271	{
917	evtimer_set (&once->to, timeout, 0.);	1272	ev_timer_set (&once->to, timeout, 0.);
918	evtimer_start (&once->to);	1273	ev_timer_start (EV_A_ &once->to);
919	}	1274	}
920	}	1275	}
921	}	1276	}
922		1277
923	/*****************************************************************************/	1278	/*****************************************************************************/
…		…
934		1289
935	static void	1290	static void
936	ocb (struct ev_timer *w, int revents)	1291	ocb (struct ev_timer *w, int revents)
937	{	1292	{
938	//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);
939	evtimer_stop (w);	1294	ev_timer_stop (w);
940	evtimer_start (w);	1295	ev_timer_start (w);
941	}	1296	}
942		1297
943	static void	1298	static void
944	scb (struct ev_signal *w, int revents)	1299	scb (struct ev_signal *w, int revents)
945	{	1300	{
946	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1301	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
947	evio_stop (&wio);	1302	ev_io_stop (&wio);
948	evio_start (&wio);	1303	ev_io_start (&wio);
949	}	1304	}
950		1305
951	static void	1306	static void
952	gcb (struct ev_signal *w, int revents)	1307	gcb (struct ev_signal *w, int revents)
953	{	1308	{
…		…
957		1312
958	int main (void)	1313	int main (void)
959	{	1314	{
960	ev_init (0);	1315	ev_init (0);
961		1316
962	evio_init (&wio, sin_cb, 0, EV_READ);	1317	ev_io_init (&wio, sin_cb, 0, EV_READ);
963	evio_start (&wio);	1318	ev_io_start (&wio);
964		1319
965	struct ev_timer t[10000];	1320	struct ev_timer t[10000];
966		1321
967	#if 0	1322	#if 0
968	int i;	1323	int i;
969	for (i = 0; i < 10000; ++i)	1324	for (i = 0; i < 10000; ++i)
970	{	1325	{
971	struct ev_timer *w = t + i;	1326	struct ev_timer *w = t + i;
972	evw_init (w, ocb, i);	1327	ev_watcher_init (w, ocb, i);
973	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);	1328	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
974	evtimer_start (w);	1329	ev_timer_start (w);
975	if (drand48 () < 0.5)	1330	if (drand48 () < 0.5)
976	evtimer_stop (w);	1331	ev_timer_stop (w);
977	}	1332	}
978	#endif	1333	#endif
979		1334
980	struct ev_timer t1;	1335	struct ev_timer t1;
981	evtimer_init (&t1, ocb, 5, 10);	1336	ev_timer_init (&t1, ocb, 5, 10);
982	evtimer_start (&t1);	1337	ev_timer_start (&t1);
983		1338
984	struct ev_signal sig;	1339	struct ev_signal sig;
985	evsignal_init (&sig, scb, SIGQUIT);	1340	ev_signal_init (&sig, scb, SIGQUIT);
986	evsignal_start (&sig);	1341	ev_signal_start (&sig);
987		1342
988	struct ev_check cw;	1343	struct ev_check cw;
989	evcheck_init (&cw, gcb);	1344	ev_check_init (&cw, gcb);
990	evcheck_start (&cw);	1345	ev_check_start (&cw);
991		1346
992	struct ev_idle iw;	1347	struct ev_idle iw;
993	evidle_init (&iw, gcb);	1348	ev_idle_init (&iw, gcb);
994	evidle_start (&iw);	1349	ev_idle_start (&iw);
995		1350
996	ev_loop (0);	1351	ev_loop (0);
997		1352
998	return 0;	1353	return 0;
999	}	1354	}

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