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

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