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Comparing libev/ev.c (file contents):
Revision 1.21 by root, Wed Oct 31 18:37:38 2007 UTC vs.
Revision 1.54 by root, Sun Nov 4 00:24:16 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	#ifdef EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
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_prepare **prepares;	466	#ifndef WCONTINUED
330	static int preparemax, preparecnt;	467	# define WCONTINUED 0
		468	#endif
331		469
332	static struct ev_check **checks;	470	static void
333	static int checkmax, checkcnt;	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
334		501
335	/*****************************************************************************/	502	/*****************************************************************************/
336		503
		504	#if EV_USE_KQUEUE
		505	# include "ev_kqueue.c"
		506	#endif
337	#if HAVE_EPOLL	507	#if EV_USE_EPOLL
338	# include "ev_epoll.c"	508	# include "ev_epoll.c"
339	#endif	509	#endif
		510	#if EV_USEV_POLL
		511	# include "ev_poll.c"
		512	#endif
340	#if HAVE_SELECT	513	#if EV_USE_SELECT
341	# include "ev_select.c"	514	# include "ev_select.c"
342	#endif	515	#endif
343		516
344	int ev_init (int flags)	517	int
		518	ev_version_major (void)
345	{	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	{
346	#if HAVE_MONOTONIC	552	#if EV_USE_MONOTONIC
347	{	553	{
348	struct timespec ts;	554	struct timespec ts;
349	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	555	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
350	have_monotonic = 1;	556	have_monotonic = 1;
351	}	557	}
352	#endif	558	#endif
353		559
354	ev_now = ev_time ();	560	rt_now = ev_time ();
355	now = get_clock ();	561	mn_now = get_clock ();
356	diff = ev_now - now;	562	now_floor = mn_now;
		563	rtmn_diff = rt_now - mn_now;
357		564
358	if (pipe (sigpipe))	565	if (pipe (sigpipe))
359	return 0;	566	return 0;
360		567
361	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
362	#if HAVE_EPOLL	578	#if EV_USE_EPOLL
363	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	579	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
364	#endif	580	#endif
		581	#if EV_USEV_POLL
		582	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
		583	#endif
365	#if HAVE_SELECT	584	#if EV_USE_SELECT
366	if (ev_method == EVMETHOD_NONE) select_init (flags);	585	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
367	#endif	586	#endif
368		587
369	if (ev_method)	588	if (method)
370	{	589	{
371	evw_init (&sigev, sigcb);	590	ev_watcher_init (&sigev, sigcb);
		591	ev_set_priority (&sigev, EV_MAXPRI);
372	siginit ();	592	siginit (EV_A);
373	}
374		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
375	return ev_method;	603	return method;
376	}	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
377		634
378	/*****************************************************************************/	635	/*****************************************************************************/
379		636
380	void ev_prefork (void)	637	void
		638	ev_fork_prepare (void)
381	{	639	{
382	/* nop */	640	/* nop */
383	}	641	}
384		642
		643	void
385	void ev_postfork_parent (void)	644	ev_fork_parent (void)
386	{	645	{
387	/* nop */	646	/* nop */
388	}	647	}
389		648
		649	void
390	void ev_postfork_child (void)	650	ev_fork_child (void)
391	{	651	{
		652	/*TODO*/
		653	#if !EV_MULTIPLICITY
392	#if HAVE_EPOLL	654	#if EV_USE_EPOLL
393	if (ev_method == EVMETHOD_EPOLL)	655	if (method == EVMETHOD_EPOLL)
394	epoll_postfork_child ();	656	epoll_postfork_child (EV_A);
395	#endif	657	#endif
396		658
397	evio_stop (&sigev);	659	ev_io_stop (EV_A_ &sigev);
398	close (sigpipe [0]);	660	close (sigpipe [0]);
399	close (sigpipe [1]);	661	close (sigpipe [1]);
400	pipe (sigpipe);	662	pipe (sigpipe);
401	siginit ();	663	siginit (EV_A);
		664	#endif
402	}	665	}
403		666
404	/*****************************************************************************/	667	/*****************************************************************************/
405		668
406	static void	669	static void
407	fd_reify (void)	670	call_pending (EV_P)
408	{	671	{
409	int i;	672	int pri;
410		673
411	for (i = 0; i < fdchangecnt; ++i)	674	for (pri = NUMPRI; pri--; )
412	{	675	while (pendingcnt [pri])
413	int fd = fdchanges [i];
414	ANFD *anfd = anfds + fd;
415	struct ev_io *w;
416
417	int wev = 0;
418
419	for (w = anfd->head; w; w = w->next)
420	wev |= w->events;
421
422	if (anfd->wev != wev)
423	{	676	{
424	method_modify (fd, anfd->wev, wev);
425	anfd->wev = wev;
426	}
427	}
428
429	fdchangecnt = 0;
430	}
431
432	static void
433	call_pending ()
434	{
435	while (pendingcnt)
436	{
437	ANPENDING *p = pendings + --pendingcnt;	677	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
438		678
439	if (p->w)	679	if (p->w)
440	{	680	{
441	p->w->pending = 0;	681	p->w->pending = 0;
442	p->w->cb (p->w, p->events);	682	p->w->cb (EV_A_ p->w, p->events);
443	}	683	}
444	}	684	}
445	}	685	}
446		686
447	static void	687	static void
448	timers_reify ()	688	timers_reify (EV_P)
449	{	689	{
450	while (timercnt && timers [0]->at <= now)	690	while (timercnt && timers [0]->at <= mn_now)
451	{	691	{
452	struct ev_timer *w = timers [0];	692	struct ev_timer *w = timers [0];
453
454	event ((W)w, EV_TIMEOUT);
455		693
456	/* first reschedule or stop timer */	694	/* first reschedule or stop timer */
457	if (w->repeat)	695	if (w->repeat)
458	{	696	{
		697	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
459	w->at = now + w->repeat;	698	w->at = mn_now + w->repeat;
460	assert (("timer timeout in the past, negative repeat?", w->at > now));
461	downheap ((WT *)timers, timercnt, 0);	699	downheap ((WT *)timers, timercnt, 0);
462	}	700	}
463	else	701	else
464	evtimer_stop (w); /* nonrepeating: stop timer */	702	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
465	}
466	}
467		703
		704	event (EV_A_ (W)w, EV_TIMEOUT);
		705	}
		706	}
		707
468	static void	708	static void
469	periodics_reify ()	709	periodics_reify (EV_P)
470	{	710	{
471	while (periodiccnt && periodics [0]->at <= ev_now)	711	while (periodiccnt && periodics [0]->at <= rt_now)
472	{	712	{
473	struct ev_periodic *w = periodics [0];	713	struct ev_periodic *w = periodics [0];
474		714
475	/* first reschedule or stop timer */	715	/* first reschedule or stop timer */
476	if (w->interval)	716	if (w->interval)
477	{	717	{
478	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	718	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
479	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	719	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
480	downheap ((WT *)periodics, periodiccnt, 0);	720	downheap ((WT *)periodics, periodiccnt, 0);
481	}	721	}
482	else	722	else
483	evperiodic_stop (w); /* nonrepeating: stop timer */	723	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
484		724
485	event ((W)w, EV_TIMEOUT);	725	event (EV_A_ (W)w, EV_PERIODIC);
486	}	726	}
487	}	727	}
488		728
489	static void	729	static void
490	periodics_reschedule (ev_tstamp diff)	730	periodics_reschedule (EV_P)
491	{	731	{
492	int i;	732	int i;
493		733
494	/* adjust periodics after time jump */	734	/* adjust periodics after time jump */
495	for (i = 0; i < periodiccnt; ++i)	735	for (i = 0; i < periodiccnt; ++i)
496	{	736	{
497	struct ev_periodic *w = periodics [i];	737	struct ev_periodic *w = periodics [i];
498		738
499	if (w->interval)	739	if (w->interval)
500	{	740	{
501	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	741	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
502		742
503	if (fabs (diff) >= 1e-4)	743	if (fabs (diff) >= 1e-4)
504	{	744	{
505	evperiodic_stop (w);	745	ev_periodic_stop (EV_A_ w);
506	evperiodic_start (w);	746	ev_periodic_start (EV_A_ w);
507		747
508	i = 0; /* restart loop, inefficient, but time jumps should be rare */	748	i = 0; /* restart loop, inefficient, but time jumps should be rare */
509	}	749	}
510	}	750	}
511	}	751	}
512	}	752	}
513		753
		754	inline int
		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
514	static void	772	static void
515	time_update ()	773	time_update (EV_P)
516	{	774	{
517	int i;	775	int i;
518		776
519	ev_now = ev_time ();	777	#if EV_USE_MONOTONIC
520
521	if (have_monotonic)	778	if (expect_true (have_monotonic))
522	{	779	{
523	ev_tstamp odiff = diff;	780	if (time_update_monotonic (EV_A))
524
525	for (i = 4; --i; ) /* loop a few times, before making important decisions */
526	{	781	{
527	now = get_clock ();	782	ev_tstamp odiff = rtmn_diff;
		783
		784	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		785	{
528	diff = ev_now - now;	786	rtmn_diff = rt_now - mn_now;
529		787
530	if (fabs (odiff - diff) < MIN_TIMEJUMP)	788	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
531	return; /* all is well */	789	return; /* all is well */
532		790
533	ev_now = ev_time ();	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) */
534	}	799	}
535
536	periodics_reschedule (diff - odiff);
537	/* no timer adjustment, as the monotonic clock doesn't jump */
538	}	800	}
539	else	801	else
		802	#endif
540	{	803	{
541	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	804	rt_now = ev_time ();
		805
		806	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
542	{	807	{
543	periodics_reschedule (ev_now - now);	808	periodics_reschedule (EV_A);
544		809
545	/* adjust timers. this is easy, as the offset is the same for all */	810	/* adjust timers. this is easy, as the offset is the same for all */
546	for (i = 0; i < timercnt; ++i)	811	for (i = 0; i < timercnt; ++i)
547	timers [i]->at += diff;	812	timers [i]->at += rt_now - mn_now;
548	}	813	}
549		814
550	now = ev_now;	815	mn_now = rt_now;
551	}	816	}
552	}	817	}
553		818
554	int ev_loop_done;	819	void
		820	ev_ref (EV_P)
		821	{
		822	++activecnt;
		823	}
555		824
		825	void
		826	ev_unref (EV_P)
		827	{
		828	--activecnt;
		829	}
		830
		831	static int loop_done;
		832
		833	void
556	void ev_loop (int flags)	834	ev_loop (EV_P_ int flags)
557	{	835	{
558	double block;	836	double block;
559	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;	837	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
560		838
561	do	839	do
562	{	840	{
563	/* queue check watchers (and execute them) */	841	/* queue check watchers (and execute them) */
564	if (preparecnt)	842	if (expect_false (preparecnt))
565	{	843	{
566	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	844	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
567	call_pending ();	845	call_pending (EV_A);
568	}	846	}
569		847
570	/* update fd-related kernel structures */	848	/* update fd-related kernel structures */
571	fd_reify ();	849	fd_reify (EV_A);
572		850
573	/* calculate blocking time */	851	/* calculate blocking time */
574		852
575	/* we only need this for !monotonic clockor timers, but as we basically	853	/* we only need this for !monotonic clockor timers, but as we basically
576	always have timers, we just calculate it always */	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	{
577	ev_now = ev_time ();	861	rt_now = ev_time ();
		862	mn_now = rt_now;
		863	}
578		864
579	if (flags & EVLOOP_NONBLOCK || idlecnt)	865	if (flags & EVLOOP_NONBLOCK || idlecnt)
580	block = 0.;	866	block = 0.;
581	else	867	else
582	{	868	{
583	block = MAX_BLOCKTIME;	869	block = MAX_BLOCKTIME;
584		870
585	if (timercnt)	871	if (timercnt)
586	{	872	{
587	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	873	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
588	if (block > to) block = to;	874	if (block > to) block = to;
589	}	875	}
590		876
591	if (periodiccnt)	877	if (periodiccnt)
592	{	878	{
593	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	879	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
594	if (block > to) block = to;	880	if (block > to) block = to;
595	}	881	}
596		882
597	if (block < 0.) block = 0.;	883	if (block < 0.) block = 0.;
598	}	884	}
599		885
600	method_poll (block);	886	method_poll (EV_A_ block);
601		887
602	/* update ev_now, do magic */	888	/* update rt_now, do magic */
603	time_update ();	889	time_update (EV_A);
604		890
605	/* queue pending timers and reschedule them */	891	/* queue pending timers and reschedule them */
606	timers_reify (); /* relative timers called last */	892	timers_reify (EV_A); /* relative timers called last */
607	periodics_reify (); /* absolute timers called first */	893	periodics_reify (EV_A); /* absolute timers called first */
608		894
609	/* queue idle watchers unless io or timers are pending */	895	/* queue idle watchers unless io or timers are pending */
610	if (!pendingcnt)	896	if (!pendingcnt)
611	queue_events ((W *)idles, idlecnt, EV_IDLE);	897	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
612		898
613	/* queue check watchers, to be executed first */	899	/* queue check watchers, to be executed first */
614	if (checkcnt)	900	if (checkcnt)
615	queue_events ((W *)checks, checkcnt, EV_CHECK);	901	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
616		902
617	call_pending ();	903	call_pending (EV_A);
618	}	904	}
619	while (!ev_loop_done);	905	while (activecnt && !loop_done);
620		906
621	if (ev_loop_done != 2)	907	if (loop_done != 2)
622	ev_loop_done = 0;	908	loop_done = 0;
		909	}
		910
		911	void
		912	ev_unloop (EV_P_ int how)
		913	{
		914	loop_done = how;
623	}	915	}
624		916
625	/*****************************************************************************/	917	/*****************************************************************************/
626		918
627	static void	919	inline void
628	wlist_add (WL *head, WL elem)	920	wlist_add (WL *head, WL elem)
629	{	921	{
630	elem->next = *head;	922	elem->next = *head;
631	*head = elem;	923	*head = elem;
632	}	924	}
633		925
634	static void	926	inline void
635	wlist_del (WL *head, WL elem)	927	wlist_del (WL *head, WL elem)
636	{	928	{
637	while (*head)	929	while (*head)
638	{	930	{
639	if (*head == elem)	931	if (*head == elem)
…		…
644		936
645	head = &(*head)->next;	937	head = &(*head)->next;
646	}	938	}
647	}	939	}
648		940
649	static void	941	inline void
650	ev_clear (W w)	942	ev_clear_pending (EV_P_ W w)
651	{	943	{
652	if (w->pending)	944	if (w->pending)
653	{	945	{
654	pendings [w->pending - 1].w = 0;	946	pendings [ABSPRI (w)][w->pending - 1].w = 0;
655	w->pending = 0;	947	w->pending = 0;
656	}	948	}
657	}	949	}
658		950
659	static void	951	inline void
660	ev_start (W w, int active)	952	ev_start (EV_P_ W w, int active)
661	{	953	{
		954	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		955	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		956
662	w->active = active;	957	w->active = active;
		958	ev_ref (EV_A);
663	}	959	}
664		960
665	static void	961	inline void
666	ev_stop (W w)	962	ev_stop (EV_P_ W w)
667	{	963	{
		964	ev_unref (EV_A);
668	w->active = 0;	965	w->active = 0;
669	}	966	}
670		967
671	/*****************************************************************************/	968	/*****************************************************************************/
672		969
673	void	970	void
674	evio_start (struct ev_io *w)	971	ev_io_start (EV_P_ struct ev_io *w)
675	{	972	{
		973	int fd = w->fd;
		974
676	if (ev_is_active (w))	975	if (ev_is_active (w))
677	return;	976	return;
678		977
679	int fd = w->fd;	978	assert (("ev_io_start called with negative fd", fd >= 0));
680		979
681	ev_start ((W)w, 1);	980	ev_start (EV_A_ (W)w, 1);
682	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	981	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
683	wlist_add ((WL *)&anfds[fd].head, (WL)w);	982	wlist_add ((WL *)&anfds[fd].head, (WL)w);
684		983
685	++fdchangecnt;	984	fd_change (EV_A_ fd);
686	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
687	fdchanges [fdchangecnt - 1] = fd;
688	}	985	}
689		986
690	void	987	void
691	evio_stop (struct ev_io *w)	988	ev_io_stop (EV_P_ struct ev_io *w)
692	{	989	{
693	ev_clear ((W)w);	990	ev_clear_pending (EV_A_ (W)w);
694	if (!ev_is_active (w))	991	if (!ev_is_active (w))
695	return;	992	return;
696		993
697	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	994	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
698	ev_stop ((W)w);	995	ev_stop (EV_A_ (W)w);
699		996
700	++fdchangecnt;	997	fd_change (EV_A_ w->fd);
701	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
702	fdchanges [fdchangecnt - 1] = w->fd;
703	}	998	}
704		999
705	void	1000	void
706	evtimer_start (struct ev_timer *w)	1001	ev_timer_start (EV_P_ struct ev_timer *w)
707	{	1002	{
708	if (ev_is_active (w))	1003	if (ev_is_active (w))
709	return;	1004	return;
710		1005
711	w->at += now;	1006	w->at += mn_now;
712		1007
713	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1008	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
714		1009
715	ev_start ((W)w, ++timercnt);	1010	ev_start (EV_A_ (W)w, ++timercnt);
716	array_needsize (timers, timermax, timercnt, );	1011	array_needsize (timers, timermax, timercnt, );
717	timers [timercnt - 1] = w;	1012	timers [timercnt - 1] = w;
718	upheap ((WT *)timers, timercnt - 1);	1013	upheap ((WT *)timers, timercnt - 1);
719	}	1014	}
720		1015
721	void	1016	void
722	evtimer_stop (struct ev_timer *w)	1017	ev_timer_stop (EV_P_ struct ev_timer *w)
723	{	1018	{
724	ev_clear ((W)w);	1019	ev_clear_pending (EV_A_ (W)w);
725	if (!ev_is_active (w))	1020	if (!ev_is_active (w))
726	return;	1021	return;
727		1022
728	if (w->active < timercnt--)	1023	if (w->active < timercnt--)
729	{	1024	{
…		…
731	downheap ((WT *)timers, timercnt, w->active - 1);	1026	downheap ((WT *)timers, timercnt, w->active - 1);
732	}	1027	}
733		1028
734	w->at = w->repeat;	1029	w->at = w->repeat;
735		1030
736	ev_stop ((W)w);	1031	ev_stop (EV_A_ (W)w);
737	}	1032	}
738		1033
739	void	1034	void
740	evtimer_again (struct ev_timer *w)	1035	ev_timer_again (EV_P_ struct ev_timer *w)
741	{	1036	{
742	if (ev_is_active (w))	1037	if (ev_is_active (w))
743	{	1038	{
744	if (w->repeat)	1039	if (w->repeat)
745	{	1040	{
746	w->at = now + w->repeat;	1041	w->at = mn_now + w->repeat;
747	downheap ((WT *)timers, timercnt, w->active - 1);	1042	downheap ((WT *)timers, timercnt, w->active - 1);
748	}	1043	}
749	else	1044	else
750	evtimer_stop (w);	1045	ev_timer_stop (EV_A_ w);
751	}	1046	}
752	else if (w->repeat)	1047	else if (w->repeat)
753	evtimer_start (w);	1048	ev_timer_start (EV_A_ w);
754	}	1049	}
755		1050
756	void	1051	void
757	evperiodic_start (struct ev_periodic *w)	1052	ev_periodic_start (EV_P_ struct ev_periodic *w)
758	{	1053	{
759	if (ev_is_active (w))	1054	if (ev_is_active (w))
760	return;	1055	return;
761		1056
762	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1057	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
763		1058
764	/* this formula differs from the one in periodic_reify because we do not always round up */	1059	/* this formula differs from the one in periodic_reify because we do not always round up */
765	if (w->interval)	1060	if (w->interval)
766	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1061	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
767		1062
768	ev_start ((W)w, ++periodiccnt);	1063	ev_start (EV_A_ (W)w, ++periodiccnt);
769	array_needsize (periodics, periodicmax, periodiccnt, );	1064	array_needsize (periodics, periodicmax, periodiccnt, );
770	periodics [periodiccnt - 1] = w;	1065	periodics [periodiccnt - 1] = w;
771	upheap ((WT *)periodics, periodiccnt - 1);	1066	upheap ((WT *)periodics, periodiccnt - 1);
772	}	1067	}
773		1068
774	void	1069	void
775	evperiodic_stop (struct ev_periodic *w)	1070	ev_periodic_stop (EV_P_ struct ev_periodic *w)
776	{	1071	{
777	ev_clear ((W)w);	1072	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1073	if (!ev_is_active (w))
779	return;	1074	return;
780		1075
781	if (w->active < periodiccnt--)	1076	if (w->active < periodiccnt--)
782	{	1077	{
783	periodics [w->active - 1] = periodics [periodiccnt];	1078	periodics [w->active - 1] = periodics [periodiccnt];
784	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1079	downheap ((WT *)periodics, periodiccnt, w->active - 1);
785	}	1080	}
786		1081
787	ev_stop ((W)w);	1082	ev_stop (EV_A_ (W)w);
788	}	1083	}
789		1084
		1085	#ifndef SA_RESTART
		1086	# define SA_RESTART 0
		1087	#endif
		1088
790	void	1089	void
791	evsignal_start (struct ev_signal *w)	1090	ev_signal_start (EV_P_ struct ev_signal *w)
792	{	1091	{
793	if (ev_is_active (w))	1092	if (ev_is_active (w))
794	return;	1093	return;
795		1094
		1095	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1096
796	ev_start ((W)w, 1);	1097	ev_start (EV_A_ (W)w, 1);
797	array_needsize (signals, signalmax, w->signum, signals_init);	1098	array_needsize (signals, signalmax, w->signum, signals_init);
798	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1099	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
799		1100
800	if (!w->next)	1101	if (!w->next)
801	{	1102	{
802	struct sigaction sa;	1103	struct sigaction sa;
803	sa.sa_handler = sighandler;	1104	sa.sa_handler = sighandler;
804	sigfillset (&sa.sa_mask);	1105	sigfillset (&sa.sa_mask);
805	sa.sa_flags = 0;	1106	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
806	sigaction (w->signum, &sa, 0);	1107	sigaction (w->signum, &sa, 0);
807	}	1108	}
808	}	1109	}
809		1110
810	void	1111	void
811	evsignal_stop (struct ev_signal *w)	1112	ev_signal_stop (EV_P_ struct ev_signal *w)
812	{	1113	{
813	ev_clear ((W)w);	1114	ev_clear_pending (EV_A_ (W)w);
814	if (!ev_is_active (w))	1115	if (!ev_is_active (w))
815	return;	1116	return;
816		1117
817	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1118	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
818	ev_stop ((W)w);	1119	ev_stop (EV_A_ (W)w);
819		1120
820	if (!signals [w->signum - 1].head)	1121	if (!signals [w->signum - 1].head)
821	signal (w->signum, SIG_DFL);	1122	signal (w->signum, SIG_DFL);
822	}	1123	}
823		1124
		1125	void
824	void evidle_start (struct ev_idle *w)	1126	ev_idle_start (EV_P_ struct ev_idle *w)
825	{	1127	{
826	if (ev_is_active (w))	1128	if (ev_is_active (w))
827	return;	1129	return;
828		1130
829	ev_start ((W)w, ++idlecnt);	1131	ev_start (EV_A_ (W)w, ++idlecnt);
830	array_needsize (idles, idlemax, idlecnt, );	1132	array_needsize (idles, idlemax, idlecnt, );
831	idles [idlecnt - 1] = w;	1133	idles [idlecnt - 1] = w;
832	}	1134	}
833		1135
		1136	void
834	void evidle_stop (struct ev_idle *w)	1137	ev_idle_stop (EV_P_ struct ev_idle *w)
835	{	1138	{
836	ev_clear ((W)w);	1139	ev_clear_pending (EV_A_ (W)w);
837	if (ev_is_active (w))	1140	if (ev_is_active (w))
838	return;	1141	return;
839		1142
840	idles [w->active - 1] = idles [--idlecnt];	1143	idles [w->active - 1] = idles [--idlecnt];
841	ev_stop ((W)w);	1144	ev_stop (EV_A_ (W)w);
842	}	1145	}
843		1146
		1147	void
844	void evprepare_start (struct ev_prepare *w)	1148	ev_prepare_start (EV_P_ struct ev_prepare *w)
845	{	1149	{
846	if (ev_is_active (w))	1150	if (ev_is_active (w))
847	return;	1151	return;
848		1152
849	ev_start ((W)w, ++preparecnt);	1153	ev_start (EV_A_ (W)w, ++preparecnt);
850	array_needsize (prepares, preparemax, preparecnt, );	1154	array_needsize (prepares, preparemax, preparecnt, );
851	prepares [preparecnt - 1] = w;	1155	prepares [preparecnt - 1] = w;
852	}	1156	}
853		1157
		1158	void
854	void evprepare_stop (struct ev_prepare *w)	1159	ev_prepare_stop (EV_P_ struct ev_prepare *w)
855	{	1160	{
856	ev_clear ((W)w);	1161	ev_clear_pending (EV_A_ (W)w);
857	if (ev_is_active (w))	1162	if (ev_is_active (w))
858	return;	1163	return;
859		1164
860	prepares [w->active - 1] = prepares [--preparecnt];	1165	prepares [w->active - 1] = prepares [--preparecnt];
861	ev_stop ((W)w);	1166	ev_stop (EV_A_ (W)w);
862	}	1167	}
863		1168
		1169	void
864	void evcheck_start (struct ev_check *w)	1170	ev_check_start (EV_P_ struct ev_check *w)
865	{	1171	{
866	if (ev_is_active (w))	1172	if (ev_is_active (w))
867	return;	1173	return;
868		1174
869	ev_start ((W)w, ++checkcnt);	1175	ev_start (EV_A_ (W)w, ++checkcnt);
870	array_needsize (checks, checkmax, checkcnt, );	1176	array_needsize (checks, checkmax, checkcnt, );
871	checks [checkcnt - 1] = w;	1177	checks [checkcnt - 1] = w;
872	}	1178	}
873		1179
		1180	void
874	void evcheck_stop (struct ev_check *w)	1181	ev_check_stop (EV_P_ struct ev_check *w)
875	{	1182	{
876	ev_clear ((W)w);	1183	ev_clear_pending (EV_A_ (W)w);
877	if (ev_is_active (w))	1184	if (ev_is_active (w))
878	return;	1185	return;
879		1186
880	checks [w->active - 1] = checks [--checkcnt];	1187	checks [w->active - 1] = checks [--checkcnt];
881	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
		1189	}
		1190
		1191	void
		1192	ev_child_start (EV_P_ struct ev_child *w)
		1193	{
		1194	if (ev_is_active (w))
		1195	return;
		1196
		1197	ev_start (EV_A_ (W)w, 1);
		1198	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1199	}
		1200
		1201	void
		1202	ev_child_stop (EV_P_ struct ev_child *w)
		1203	{
		1204	ev_clear_pending (EV_A_ (W)w);
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		1209	ev_stop (EV_A_ (W)w);
882	}	1210	}
883		1211
884	/*****************************************************************************/	1212	/*****************************************************************************/
885		1213
886	struct ev_once	1214	struct ev_once
…		…
890	void (*cb)(int revents, void *arg);	1218	void (*cb)(int revents, void *arg);
891	void *arg;	1219	void *arg;
892	};	1220	};
893		1221
894	static void	1222	static void
895	once_cb (struct ev_once *once, int revents)	1223	once_cb (EV_P_ struct ev_once *once, int revents)
896	{	1224	{
897	void (*cb)(int revents, void *arg) = once->cb;	1225	void (*cb)(int revents, void *arg) = once->cb;
898	void *arg = once->arg;	1226	void *arg = once->arg;
899		1227
900	evio_stop (&once->io);	1228	ev_io_stop (EV_A_ &once->io);
901	evtimer_stop (&once->to);	1229	ev_timer_stop (EV_A_ &once->to);
902	free (once);	1230	free (once);
903		1231
904	cb (revents, arg);	1232	cb (revents, arg);
905	}	1233	}
906		1234
907	static void	1235	static void
908	once_cb_io (struct ev_io *w, int revents)	1236	once_cb_io (EV_P_ struct ev_io *w, int revents)
909	{	1237	{
910	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1238	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
911	}	1239	}
912		1240
913	static void	1241	static void
914	once_cb_to (struct ev_timer *w, int revents)	1242	once_cb_to (EV_P_ struct ev_timer *w, int revents)
915	{	1243	{
916	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1244	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
917	}	1245	}
918		1246
919	void	1247	void
920	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1248	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
921	{	1249	{
922	struct ev_once *once = malloc (sizeof (struct ev_once));	1250	struct ev_once *once = malloc (sizeof (struct ev_once));
923		1251
924	if (!once)	1252	if (!once)
925	cb (EV_ERROR, arg);	1253	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
926	else	1254	else
927	{	1255	{
928	once->cb = cb;	1256	once->cb = cb;
929	once->arg = arg;	1257	once->arg = arg;
930		1258
931	evw_init (&once->io, once_cb_io);	1259	ev_watcher_init (&once->io, once_cb_io);
932
933	if (fd >= 0)	1260	if (fd >= 0)
934	{	1261	{
935	evio_set (&once->io, fd, events);	1262	ev_io_set (&once->io, fd, events);
936	evio_start (&once->io);	1263	ev_io_start (EV_A_ &once->io);
937	}	1264	}
938		1265
939	evw_init (&once->to, once_cb_to);	1266	ev_watcher_init (&once->to, once_cb_to);
940
941	if (timeout >= 0.)	1267	if (timeout >= 0.)
942	{	1268	{
943	evtimer_set (&once->to, timeout, 0.);	1269	ev_timer_set (&once->to, timeout, 0.);
944	evtimer_start (&once->to);	1270	ev_timer_start (EV_A_ &once->to);
945	}	1271	}
946	}	1272	}
947	}	1273	}
948		1274
949	/*****************************************************************************/	1275	/*****************************************************************************/
…		…
960		1286
961	static void	1287	static void
962	ocb (struct ev_timer *w, int revents)	1288	ocb (struct ev_timer *w, int revents)
963	{	1289	{
964	//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);
965	evtimer_stop (w);	1291	ev_timer_stop (w);
966	evtimer_start (w);	1292	ev_timer_start (w);
967	}	1293	}
968		1294
969	static void	1295	static void
970	scb (struct ev_signal *w, int revents)	1296	scb (struct ev_signal *w, int revents)
971	{	1297	{
972	fprintf (stderr, "signal %x,%d\n", revents, w->signum);	1298	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
973	evio_stop (&wio);	1299	ev_io_stop (&wio);
974	evio_start (&wio);	1300	ev_io_start (&wio);
975	}	1301	}
976		1302
977	static void	1303	static void
978	gcb (struct ev_signal *w, int revents)	1304	gcb (struct ev_signal *w, int revents)
979	{	1305	{
…		…
983		1309
984	int main (void)	1310	int main (void)
985	{	1311	{
986	ev_init (0);	1312	ev_init (0);
987		1313
988	evio_init (&wio, sin_cb, 0, EV_READ);	1314	ev_io_init (&wio, sin_cb, 0, EV_READ);
989	evio_start (&wio);	1315	ev_io_start (&wio);
990		1316
991	struct ev_timer t[10000];	1317	struct ev_timer t[10000];
992		1318
993	#if 0	1319	#if 0
994	int i;	1320	int i;
995	for (i = 0; i < 10000; ++i)	1321	for (i = 0; i < 10000; ++i)
996	{	1322	{
997	struct ev_timer *w = t + i;	1323	struct ev_timer *w = t + i;
998	evw_init (w, ocb, i);	1324	ev_watcher_init (w, ocb, i);
999	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);	1325	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1000	evtimer_start (w);	1326	ev_timer_start (w);
1001	if (drand48 () < 0.5)	1327	if (drand48 () < 0.5)
1002	evtimer_stop (w);	1328	ev_timer_stop (w);
1003	}	1329	}
1004	#endif	1330	#endif
1005		1331
1006	struct ev_timer t1;	1332	struct ev_timer t1;
1007	evtimer_init (&t1, ocb, 5, 10);	1333	ev_timer_init (&t1, ocb, 5, 10);
1008	evtimer_start (&t1);	1334	ev_timer_start (&t1);
1009		1335
1010	struct ev_signal sig;	1336	struct ev_signal sig;
1011	evsignal_init (&sig, scb, SIGQUIT);	1337	ev_signal_init (&sig, scb, SIGQUIT);
1012	evsignal_start (&sig);	1338	ev_signal_start (&sig);
1013		1339
1014	struct ev_check cw;	1340	struct ev_check cw;
1015	evcheck_init (&cw, gcb);	1341	ev_check_init (&cw, gcb);
1016	evcheck_start (&cw);	1342	ev_check_start (&cw);
1017		1343
1018	struct ev_idle iw;	1344	struct ev_idle iw;
1019	evidle_init (&iw, gcb);	1345	ev_idle_init (&iw, gcb);
1020	evidle_start (&iw);	1346	ev_idle_start (&iw);
1021		1347
1022	ev_loop (0);	1348	ev_loop (0);
1023		1349
1024	return 0;	1350	return 0;
1025	}	1351	}

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