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Comparing libev/ev.c (file contents):
Revision 1.32 by root, Thu Nov 1 09:21:51 2007 UTC vs.
Revision 1.68 by root, Mon Nov 5 20:19:00 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	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>	59	#include <unistd.h>
…		…
40	#include <stdio.h>	64	#include <stdio.h>
41		65
42	#include <assert.h>	66	#include <assert.h>
43	#include <errno.h>	67	#include <errno.h>
44	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
45	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
46	#include <sys/time.h>	72	#include <sys/time.h>
47	#include <time.h>	73	#include <time.h>
48		74
		75	/**/
		76
49	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	79	#endif
54		80
55	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
57	#endif	83	#endif
58		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
59	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
61	#endif	91	#endif
62		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
63	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
65	#endif	119	#endif
66	#ifndef EV_USE_REALTIME	120
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
68	#endif
69		122
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		127
75	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		143
77	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
80		147
81	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84		149
85	static int have_monotonic; /* runtime */	150	#if WIN32
86		151	/* note: the comment below could not be substantiated, but what would I care */
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
88	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
89	static void (*method_poll)(ev_tstamp timeout);	154	#endif
90		155
91	/*****************************************************************************/	156	/*****************************************************************************/
92		157
93	ev_tstamp	158	typedef struct
		159	{
		160	WL head;
		161	unsigned char events;
		162	unsigned char reify;
		163	} ANFD;
		164
		165	typedef struct
		166	{
		167	W w;
		168	int events;
		169	} ANPENDING;
		170
		171	#if EV_MULTIPLICITY
		172
		173	struct ev_loop
		174	{
		175	# define VAR(name,decl) decl;
		176	# include "ev_vars.h"
		177	};
		178	# undef VAR
		179	# include "ev_wrap.h"
		180
		181	#else
		182
		183	# define VAR(name,decl) static decl;
		184	# include "ev_vars.h"
		185	# undef VAR
		186
		187	#endif
		188
		189	/*****************************************************************************/
		190
		191	inline ev_tstamp
94	ev_time (void)	192	ev_time (void)
95	{	193	{
96	#if EV_USE_REALTIME	194	#if EV_USE_REALTIME
97	struct timespec ts;	195	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	202	#endif
105	}	203	}
106		204
107	static ev_tstamp	205	inline ev_tstamp
108	get_clock (void)	206	get_clock (void)
109	{	207	{
110	#if EV_USE_MONOTONIC	208	#if EV_USE_MONOTONIC
111	if (have_monotonic)	209	if (expect_true (have_monotonic))
112	{	210	{
113	struct timespec ts;	211	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	214	}
117	#endif	215	#endif
118		216
119	return ev_time ();	217	return ev_time ();
120	}	218	}
121		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	226	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		227
124	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
126	{ \	230	{ \
127	int newcnt = cur; \	231	int newcnt = cur; \
128	do \	232	do \
129	{ \	233	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	234	newcnt = array_roundsize (base, newcnt << 1); \
…		…
134	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
135	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
136	cur = newcnt; \	240	cur = newcnt; \
137	}	241	}
138		242
		243	#define array_slim(stem) \
		244	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		245	{ \
		246	stem ## max = array_roundsize (stem ## cnt >> 1); \
		247	base = realloc (base, sizeof (*base) * (stem ## max)); \
		248	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		249	}
		250
		251	#define array_free(stem, idx) \
		252	free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
		253
139	/*****************************************************************************/	254	/*****************************************************************************/
140
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149		255
150	static void	256	static void
151	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
152	{	258	{
153	while (count--)	259	while (count--)
154	{	260	{
155	base->head = 0;	261	base->head = 0;
156	base->events = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
157	++base;	265	++base;
158	}	266	}
159	}	267	}
160		268
161	typedef struct
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void	269	static void
171	event (W w, int events)	270	event (EV_P_ W w, int events)
172	{	271	{
173	if (w->pending)	272	if (w->pending)
174	{	273	{
175	pendings [w->pending - 1].events |= events;	274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
176	return;	275	return;
177	}	276	}
178		277
179	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
180	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
181	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
182	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
183	}	282	}
184		283
185	static void	284	static void
186	queue_events (W *events, int eventcnt, int type)	285	queue_events (EV_P_ W *events, int eventcnt, int type)
187	{	286	{
188	int i;	287	int i;
189		288
190	for (i = 0; i < eventcnt; ++i)	289	for (i = 0; i < eventcnt; ++i)
191	event (events [i], type);	290	event (EV_A_ events [i], type);
192	}	291	}
193		292
194	static void	293	static void
195	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
196	{	295	{
197	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
198	struct ev_io *w;	297	struct ev_io *w;
199		298
200	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
201	{	300	{
202	int ev = w->events & events;	301	int ev = w->events & events;
203		302
204	if (ev)	303	if (ev)
205	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
206	}	305	}
207	}	306	}
208		307
209	/*****************************************************************************/	308	/*****************************************************************************/
210		309
211	static int *fdchanges;
212	static int fdchangemax, fdchangecnt;
213
214	static void	310	static void
215	fd_reify (void)	311	fd_reify (EV_P)
216	{	312	{
217	int i;	313	int i;
218		314
219	for (i = 0; i < fdchangecnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
220	{	316	{
…		…
222	ANFD *anfd = anfds + fd;	318	ANFD *anfd = anfds + fd;
223	struct ev_io *w;	319	struct ev_io *w;
224		320
225	int events = 0;	321	int events = 0;
226		322
227	for (w = anfd->head; w; w = w->next)	323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
228	events |= w->events;	324	events |= w->events;
229		325
230	anfd->events &= ~EV_REIFY;	326	anfd->reify = 0;
231		327
232	if (anfd->events != events)
233	{
234	method_modify (fd, anfd->events, events);	328	method_modify (EV_A_ fd, anfd->events, events);
235	anfd->events = events;	329	anfd->events = events;
236	}
237	}	330	}
238		331
239	fdchangecnt = 0;	332	fdchangecnt = 0;
240	}	333	}
241		334
242	static void	335	static void
243	fd_change (int fd)	336	fd_change (EV_P_ int fd)
244	{	337	{
245	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	338	if (anfds [fd].reify || fdchangecnt < 0)
246	return;	339	return;
247		340
248	anfds [fd].events |= EV_REIFY;	341	anfds [fd].reify = 1;
249		342
250	++fdchangecnt;	343	++fdchangecnt;
251	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
252	fdchanges [fdchangecnt - 1] = fd;	345	fdchanges [fdchangecnt - 1] = fd;
253	}	346	}
254		347
		348	static void
		349	fd_kill (EV_P_ int fd)
		350	{
		351	struct ev_io *w;
		352
		353	while ((w = (struct ev_io *)anfds [fd].head))
		354	{
		355	ev_io_stop (EV_A_ w);
		356	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		357	}
		358	}
		359
255	/* called on EBADF to verify fds */	360	/* called on EBADF to verify fds */
256	static void	361	static void
257	fd_recheck (void)	362	fd_ebadf (EV_P)
258	{	363	{
259	int fd;	364	int fd;
260		365
261	for (fd = 0; fd < anfdmax; ++fd)	366	for (fd = 0; fd < anfdmax; ++fd)
262	if (anfds [fd].events)	367	if (anfds [fd].events)
263	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
264	while (anfds [fd].head)	369	fd_kill (EV_A_ fd);
		370	}
		371
		372	/* called on ENOMEM in select/poll to kill some fds and retry */
		373	static void
		374	fd_enomem (EV_P)
		375	{
		376	int fd;
		377
		378	for (fd = anfdmax; fd--; )
		379	if (anfds [fd].events)
265	{	380	{
266	ev_io_stop (anfds [fd].head);	381	fd_kill (EV_A_ fd);
267	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	382	return;
268	}	383	}
		384	}
		385
		386	/* susually called after fork if method needs to re-arm all fds from scratch */
		387	static void
		388	fd_rearm_all (EV_P)
		389	{
		390	int fd;
		391
		392	/* this should be highly optimised to not do anything but set a flag */
		393	for (fd = 0; fd < anfdmax; ++fd)
		394	if (anfds [fd].events)
		395	{
		396	anfds [fd].events = 0;
		397	fd_change (EV_A_ fd);
		398	}
269	}	399	}
270		400
271	/*****************************************************************************/	401	/*****************************************************************************/
272		402
273	static struct ev_timer **timers;
274	static int timermax, timercnt;
275
276	static struct ev_periodic **periodics;
277	static int periodicmax, periodiccnt;
278
279	static void	403	static void
280	upheap (WT *timers, int k)	404	upheap (WT *heap, int k)
281	{	405	{
282	WT w = timers [k];	406	WT w = heap [k];
283		407
284	while (k && timers [k >> 1]->at > w->at)	408	while (k && heap [k >> 1]->at > w->at)
285	{	409	{
286	timers [k] = timers [k >> 1];	410	heap [k] = heap [k >> 1];
287	timers [k]->active = k + 1;	411	((W)heap [k])->active = k + 1;
288	k >>= 1;	412	k >>= 1;
289	}	413	}
290		414
291	timers [k] = w;	415	heap [k] = w;
292	timers [k]->active = k + 1;	416	((W)heap [k])->active = k + 1;
293		417
294	}	418	}
295		419
296	static void	420	static void
297	downheap (WT *timers, int N, int k)	421	downheap (WT *heap, int N, int k)
298	{	422	{
299	WT w = timers [k];	423	WT w = heap [k];
300		424
301	while (k < (N >> 1))	425	while (k < (N >> 1))
302	{	426	{
303	int j = k << 1;	427	int j = k << 1;
304		428
305	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
306	++j;	430	++j;
307		431
308	if (w->at <= timers [j]->at)	432	if (w->at <= heap [j]->at)
309	break;	433	break;
310		434
311	timers [k] = timers [j];	435	heap [k] = heap [j];
312	timers [k]->active = k + 1;	436	((W)heap [k])->active = k + 1;
313	k = j;	437	k = j;
314	}	438	}
315		439
316	timers [k] = w;	440	heap [k] = w;
317	timers [k]->active = k + 1;	441	((W)heap [k])->active = k + 1;
318	}	442	}
319		443
320	/*****************************************************************************/	444	/*****************************************************************************/
321		445
322	typedef struct	446	typedef struct
323	{	447	{
324	struct ev_signal *head;	448	WL head;
325	sig_atomic_t gotsig;	449	sig_atomic_t volatile gotsig;
326	} ANSIG;	450	} ANSIG;
327		451
328	static ANSIG *signals;	452	static ANSIG *signals;
329	static int signalmax;	453	static int signalmax;
330		454
331	static int sigpipe [2];	455	static int sigpipe [2];
332	static sig_atomic_t gotsig;	456	static sig_atomic_t volatile gotsig;
333	static struct ev_io sigev;	457	static struct ev_io sigev;
334		458
335	static void	459	static void
336	signals_init (ANSIG *base, int count)	460	signals_init (ANSIG *base, int count)
337	{	461	{
338	while (count--)	462	while (count--)
339	{	463	{
340	base->head = 0;	464	base->head = 0;
341	base->gotsig = 0;	465	base->gotsig = 0;
		466
342	++base;	467	++base;
343	}	468	}
344	}	469	}
345		470
346	static void	471	static void
347	sighandler (int signum)	472	sighandler (int signum)
348	{	473	{
		474	#if WIN32
		475	signal (signum, sighandler);
		476	#endif
		477
349	signals [signum - 1].gotsig = 1;	478	signals [signum - 1].gotsig = 1;
350		479
351	if (!gotsig)	480	if (!gotsig)
352	{	481	{
		482	int old_errno = errno;
353	gotsig = 1;	483	gotsig = 1;
354	write (sigpipe [1], &gotsig, 1);	484	write (sigpipe [1], &signum, 1);
		485	errno = old_errno;
355	}	486	}
356	}	487	}
357		488
358	static void	489	static void
359	sigcb (struct ev_io *iow, int revents)	490	sigcb (EV_P_ struct ev_io *iow, int revents)
360	{	491	{
361	struct ev_signal *w;	492	WL w;
362	int sig;	493	int signum;
363		494
		495	read (sigpipe [0], &revents, 1);
364	gotsig = 0;	496	gotsig = 0;
365	read (sigpipe [0], &revents, 1);
366		497
367	for (sig = signalmax; sig--; )	498	for (signum = signalmax; signum--; )
368	if (signals [sig].gotsig)	499	if (signals [signum].gotsig)
369	{	500	{
370	signals [sig].gotsig = 0;	501	signals [signum].gotsig = 0;
371		502
372	for (w = signals [sig].head; w; w = w->next)	503	for (w = signals [signum].head; w; w = w->next)
373	event ((W)w, EV_SIGNAL);	504	event (EV_A_ (W)w, EV_SIGNAL);
374	}	505	}
375	}	506	}
376		507
377	static void	508	static void
378	siginit (void)	509	siginit (EV_P)
379	{	510	{
		511	#ifndef WIN32
380	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	512	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
381	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
382		514
383	/* rather than sort out wether we really need nb, set it */	515	/* rather than sort out wether we really need nb, set it */
384	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
385	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		518	#endif
386		519
387	ev_io_set (&sigev, sigpipe [0], EV_READ);	520	ev_io_set (&sigev, sigpipe [0], EV_READ);
388	ev_io_start (&sigev);	521	ev_io_start (EV_A_ &sigev);
		522	ev_unref (EV_A); /* child watcher should not keep loop alive */
389	}	523	}
390		524
391	/*****************************************************************************/	525	/*****************************************************************************/
392		526
393	static struct ev_idle **idles;	527	#ifndef WIN32
394	static int idlemax, idlecnt;
395
396	static struct ev_prepare **prepares;
397	static int preparemax, preparecnt;
398
399	static struct ev_check **checks;
400	static int checkmax, checkcnt;
401
402	/*****************************************************************************/
403		528
404	static struct ev_child *childs [PID_HASHSIZE];	529	static struct ev_child *childs [PID_HASHSIZE];
405	static struct ev_signal childev;	530	static struct ev_signal childev;
406		531
407	#ifndef WCONTINUED	532	#ifndef WCONTINUED
408	# define WCONTINUED 0	533	# define WCONTINUED 0
409	#endif	534	#endif
410		535
411	static void	536	static void
412	childcb (struct ev_signal *sw, int revents)	537	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
413	{	538	{
414	struct ev_child *w;	539	struct ev_child *w;
		540
		541	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		542	if (w->pid == pid || !w->pid)
		543	{
		544	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		545	w->rpid = pid;
		546	w->rstatus = status;
		547	event (EV_A_ (W)w, EV_CHILD);
		548	}
		549	}
		550
		551	static void
		552	childcb (EV_P_ struct ev_signal *sw, int revents)
		553	{
415	int pid, status;	554	int pid, status;
416		555
417	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	556	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
418	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	557	{
419	if (w->pid == pid || w->pid == -1)	558	/* make sure we are called again until all childs have been reaped */
420	{	559	event (EV_A_ (W)sw, EV_SIGNAL);
421	w->status = status;	560
422	event ((W)w, EV_CHILD);	561	child_reap (EV_A_ sw, pid, pid, status);
423	}	562	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		563	}
424	}	564	}
		565
		566	#endif
425		567
426	/*****************************************************************************/	568	/*****************************************************************************/
427		569
		570	#if EV_USE_KQUEUE
		571	# include "ev_kqueue.c"
		572	#endif
428	#if EV_USE_EPOLL	573	#if EV_USE_EPOLL
429	# include "ev_epoll.c"	574	# include "ev_epoll.c"
430	#endif	575	#endif
		576	#if EV_USE_POLL
		577	# include "ev_poll.c"
		578	#endif
431	#if EV_USE_SELECT	579	#if EV_USE_SELECT
432	# include "ev_select.c"	580	# include "ev_select.c"
433	#endif	581	#endif
434		582
435	int	583	int
…		…
442	ev_version_minor (void)	590	ev_version_minor (void)
443	{	591	{
444	return EV_VERSION_MINOR;	592	return EV_VERSION_MINOR;
445	}	593	}
446		594
447	int ev_init (int flags)	595	/* return true if we are running with elevated privileges and should ignore env variables */
		596	static int
		597	enable_secure (void)
448	{	598	{
		599	#ifdef WIN32
		600	return 0;
		601	#else
		602	return getuid () != geteuid ()
		603	|| getgid () != getegid ();
		604	#endif
		605	}
		606
		607	int
		608	ev_method (EV_P)
		609	{
		610	return method;
		611	}
		612
		613	static void
		614	loop_init (EV_P_ int methods)
		615	{
449	if (!ev_method)	616	if (!method)
450	{	617	{
451	#if EV_USE_MONOTONIC	618	#if EV_USE_MONOTONIC
452	{	619	{
453	struct timespec ts;	620	struct timespec ts;
454	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	621	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
455	have_monotonic = 1;	622	have_monotonic = 1;
456	}	623	}
457	#endif	624	#endif
458		625
459	ev_now = ev_time ();	626	rt_now = ev_time ();
460	now = get_clock ();	627	mn_now = get_clock ();
		628	now_floor = mn_now;
461	diff = ev_now - now;	629	rtmn_diff = rt_now - mn_now;
462		630
463	if (pipe (sigpipe))	631	if (methods == EVMETHOD_AUTO)
464	return 0;	632	if (!enable_secure () && getenv ("LIBEV_METHODS"))
465		633	methods = atoi (getenv ("LIBEV_METHODS"));
		634	else
466	ev_method = EVMETHOD_NONE;	635	methods = EVMETHOD_ANY;
		636
		637	method = 0;
		638	#if EV_USE_WIN32
		639	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		640	#endif
		641	#if EV_USE_KQUEUE
		642	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		643	#endif
467	#if EV_USE_EPOLL	644	#if EV_USE_EPOLL
468	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	645	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		646	#endif
		647	#if EV_USE_POLL
		648	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
469	#endif	649	#endif
470	#if EV_USE_SELECT	650	#if EV_USE_SELECT
471	if (ev_method == EVMETHOD_NONE) select_init (flags);	651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
472	#endif	652	#endif
		653	}
		654	}
473		655
		656	void
		657	loop_destroy (EV_P)
		658	{
		659	int i;
		660
		661	#if EV_USE_WIN32
		662	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		663	#endif
		664	#if EV_USE_KQUEUE
		665	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		666	#endif
		667	#if EV_USE_EPOLL
		668	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		669	#endif
		670	#if EV_USE_POLL
		671	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		672	#endif
		673	#if EV_USE_SELECT
		674	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		675	#endif
		676
		677	for (i = NUMPRI; i--; )
		678	array_free (pending, [i]);
		679
		680	array_free (fdchange, );
		681	array_free (timer, );
		682	array_free (periodic, );
		683	array_free (idle, );
		684	array_free (prepare, );
		685	array_free (check, );
		686
		687	method = 0;
		688	/*TODO*/
		689	}
		690
		691	void
		692	loop_fork (EV_P)
		693	{
		694	/*TODO*/
		695	#if EV_USE_EPOLL
		696	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		697	#endif
		698	#if EV_USE_KQUEUE
		699	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		700	#endif
		701	}
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop *
		705	ev_loop_new (int methods)
		706	{
		707	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		708
		709	loop_init (EV_A_ methods);
		710
		711	if (ev_method (EV_A))
		712	return loop;
		713
		714	return 0;
		715	}
		716
		717	void
		718	ev_loop_destroy (EV_P)
		719	{
		720	loop_destroy (EV_A);
		721	free (loop);
		722	}
		723
		724	void
		725	ev_loop_fork (EV_P)
		726	{
		727	loop_fork (EV_A);
		728	}
		729
		730	#endif
		731
		732	#if EV_MULTIPLICITY
		733	struct ev_loop default_loop_struct;
		734	static struct ev_loop *default_loop;
		735
		736	struct ev_loop *
		737	#else
		738	static int default_loop;
		739
		740	int
		741	#endif
		742	ev_default_loop (int methods)
		743	{
		744	if (sigpipe [0] == sigpipe [1])
		745	if (pipe (sigpipe))
		746	return 0;
		747
		748	if (!default_loop)
		749	{
		750	#if EV_MULTIPLICITY
		751	struct ev_loop *loop = default_loop = &default_loop_struct;
		752	#else
		753	default_loop = 1;
		754	#endif
		755
		756	loop_init (EV_A_ methods);
		757
474	if (ev_method)	758	if (ev_method (EV_A))
475	{	759	{
476	ev_watcher_init (&sigev, sigcb);	760	ev_watcher_init (&sigev, sigcb);
		761	ev_set_priority (&sigev, EV_MAXPRI);
477	siginit ();	762	siginit (EV_A);
478		763
		764	#ifndef WIN32
479	ev_signal_init (&childev, childcb, SIGCHLD);	765	ev_signal_init (&childev, childcb, SIGCHLD);
		766	ev_set_priority (&childev, EV_MAXPRI);
480	ev_signal_start (&childev);	767	ev_signal_start (EV_A_ &childev);
		768	ev_unref (EV_A); /* child watcher should not keep loop alive */
		769	#endif
481	}	770	}
		771	else
		772	default_loop = 0;
482	}	773	}
483		774
484	return ev_method;	775	return default_loop;
485	}	776	}
486		777
487	/*****************************************************************************/
488
489	void	778	void
490	ev_prefork (void)	779	ev_default_destroy (void)
491	{	780	{
492	/* nop */	781	#if EV_MULTIPLICITY
493	}	782	struct ev_loop *loop = default_loop;
494
495	void
496	ev_postfork_parent (void)
497	{
498	/* nop */
499	}
500
501	void
502	ev_postfork_child (void)
503	{
504	#if EV_USE_EPOLL
505	if (ev_method == EVMETHOD_EPOLL)
506	epoll_postfork_child ();
507	#endif	783	#endif
508		784
		785	ev_ref (EV_A); /* child watcher */
		786	ev_signal_stop (EV_A_ &childev);
		787
		788	ev_ref (EV_A); /* signal watcher */
509	ev_io_stop (&sigev);	789	ev_io_stop (EV_A_ &sigev);
		790
		791	close (sigpipe [0]); sigpipe [0] = 0;
		792	close (sigpipe [1]); sigpipe [1] = 0;
		793
		794	loop_destroy (EV_A);
		795	}
		796
		797	void
		798	ev_default_fork (void)
		799	{
		800	#if EV_MULTIPLICITY
		801	struct ev_loop *loop = default_loop;
		802	#endif
		803
		804	loop_fork (EV_A);
		805
		806	ev_io_stop (EV_A_ &sigev);
510	close (sigpipe [0]);	807	close (sigpipe [0]);
511	close (sigpipe [1]);	808	close (sigpipe [1]);
512	pipe (sigpipe);	809	pipe (sigpipe);
		810
		811	ev_ref (EV_A); /* signal watcher */
513	siginit ();	812	siginit (EV_A);
514	}	813	}
515		814
516	/*****************************************************************************/	815	/*****************************************************************************/
517		816
518	static void	817	static void
519	call_pending (void)	818	call_pending (EV_P)
520	{	819	{
		820	int pri;
		821
		822	for (pri = NUMPRI; pri--; )
521	while (pendingcnt)	823	while (pendingcnt [pri])
522	{	824	{
523	ANPENDING *p = pendings + --pendingcnt;	825	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
524		826
525	if (p->w)	827	if (p->w)
526	{	828	{
527	p->w->pending = 0;	829	p->w->pending = 0;
528	p->w->cb (p->w, p->events);	830	p->w->cb (EV_A_ p->w, p->events);
529	}	831	}
530	}	832	}
531	}	833	}
532		834
533	static void	835	static void
534	timers_reify (void)	836	timers_reify (EV_P)
535	{	837	{
536	while (timercnt && timers [0]->at <= now)	838	while (timercnt && ((WT)timers [0])->at <= mn_now)
537	{	839	{
538	struct ev_timer *w = timers [0];	840	struct ev_timer *w = timers [0];
		841
		842	assert (("inactive timer on timer heap detected", ev_is_active (w)));
539		843
540	/* first reschedule or stop timer */	844	/* first reschedule or stop timer */
541	if (w->repeat)	845	if (w->repeat)
542	{	846	{
		847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
543	w->at = now + w->repeat;	848	((WT)w)->at = mn_now + w->repeat;
544	assert (("timer timeout in the past, negative repeat?", w->at > now));
545	downheap ((WT *)timers, timercnt, 0);	849	downheap ((WT *)timers, timercnt, 0);
546	}	850	}
547	else	851	else
548	ev_timer_stop (w); /* nonrepeating: stop timer */	852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
549		853
550	event ((W)w, EV_TIMEOUT);	854	event (EV_A_ (W)w, EV_TIMEOUT);
551	}	855	}
552	}	856	}
553		857
554	static void	858	static void
555	periodics_reify (void)	859	periodics_reify (EV_P)
556	{	860	{
557	while (periodiccnt && periodics [0]->at <= ev_now)	861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
558	{	862	{
559	struct ev_periodic *w = periodics [0];	863	struct ev_periodic *w = periodics [0];
		864
		865	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
560		866
561	/* first reschedule or stop timer */	867	/* first reschedule or stop timer */
562	if (w->interval)	868	if (w->interval)
563	{	869	{
564	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	870	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
565	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	871	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
566	downheap ((WT *)periodics, periodiccnt, 0);	872	downheap ((WT *)periodics, periodiccnt, 0);
567	}	873	}
568	else	874	else
569	ev_periodic_stop (w); /* nonrepeating: stop timer */	875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
570		876
571	event ((W)w, EV_TIMEOUT);	877	event (EV_A_ (W)w, EV_PERIODIC);
572	}	878	}
573	}	879	}
574		880
575	static void	881	static void
576	periodics_reschedule (ev_tstamp diff)	882	periodics_reschedule (EV_P)
577	{	883	{
578	int i;	884	int i;
579		885
580	/* adjust periodics after time jump */	886	/* adjust periodics after time jump */
581	for (i = 0; i < periodiccnt; ++i)	887	for (i = 0; i < periodiccnt; ++i)
582	{	888	{
583	struct ev_periodic *w = periodics [i];	889	struct ev_periodic *w = periodics [i];
584		890
585	if (w->interval)	891	if (w->interval)
586	{	892	{
587	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	893	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
588		894
589	if (fabs (diff) >= 1e-4)	895	if (fabs (diff) >= 1e-4)
590	{	896	{
591	ev_periodic_stop (w);	897	ev_periodic_stop (EV_A_ w);
592	ev_periodic_start (w);	898	ev_periodic_start (EV_A_ w);
593		899
594	i = 0; /* restart loop, inefficient, but time jumps should be rare */	900	i = 0; /* restart loop, inefficient, but time jumps should be rare */
595	}	901	}
596	}	902	}
597	}	903	}
598	}	904	}
599		905
		906	inline int
		907	time_update_monotonic (EV_P)
		908	{
		909	mn_now = get_clock ();
		910
		911	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		912	{
		913	rt_now = rtmn_diff + mn_now;
		914	return 0;
		915	}
		916	else
		917	{
		918	now_floor = mn_now;
		919	rt_now = ev_time ();
		920	return 1;
		921	}
		922	}
		923
600	static void	924	static void
601	time_update (void)	925	time_update (EV_P)
602	{	926	{
603	int i;	927	int i;
604		928
605	ev_now = ev_time ();	929	#if EV_USE_MONOTONIC
606
607	if (have_monotonic)	930	if (expect_true (have_monotonic))
608	{	931	{
609	ev_tstamp odiff = diff;	932	if (time_update_monotonic (EV_A))
610
611	for (i = 4; --i; ) /* loop a few times, before making important decisions */
612	{	933	{
613	now = get_clock ();	934	ev_tstamp odiff = rtmn_diff;
		935
		936	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		937	{
614	diff = ev_now - now;	938	rtmn_diff = rt_now - mn_now;
615		939
616	if (fabs (odiff - diff) < MIN_TIMEJUMP)	940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
617	return; /* all is well */	941	return; /* all is well */
618		942
619	ev_now = ev_time ();	943	rt_now = ev_time ();
		944	mn_now = get_clock ();
		945	now_floor = mn_now;
		946	}
		947
		948	periodics_reschedule (EV_A);
		949	/* no timer adjustment, as the monotonic clock doesn't jump */
		950	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
620	}	951	}
621
622	periodics_reschedule (diff - odiff);
623	/* no timer adjustment, as the monotonic clock doesn't jump */
624	}	952	}
625	else	953	else
		954	#endif
626	{	955	{
627	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	956	rt_now = ev_time ();
		957
		958	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
628	{	959	{
629	periodics_reschedule (ev_now - now);	960	periodics_reschedule (EV_A);
630		961
631	/* adjust timers. this is easy, as the offset is the same for all */	962	/* adjust timers. this is easy, as the offset is the same for all */
632	for (i = 0; i < timercnt; ++i)	963	for (i = 0; i < timercnt; ++i)
633	timers [i]->at += diff;	964	((WT)timers [i])->at += rt_now - mn_now;
634	}	965	}
635		966
636	now = ev_now;	967	mn_now = rt_now;
637	}	968	}
638	}	969	}
639		970
640	int ev_loop_done;	971	void
		972	ev_ref (EV_P)
		973	{
		974	++activecnt;
		975	}
641		976
		977	void
		978	ev_unref (EV_P)
		979	{
		980	--activecnt;
		981	}
		982
		983	static int loop_done;
		984
		985	void
642	void ev_loop (int flags)	986	ev_loop (EV_P_ int flags)
643	{	987	{
644	double block;	988	double block;
645	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	989	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
646		990
647	do	991	do
648	{	992	{
649	/* queue check watchers (and execute them) */	993	/* queue check watchers (and execute them) */
650	if (preparecnt)	994	if (expect_false (preparecnt))
651	{	995	{
652	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	996	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
653	call_pending ();	997	call_pending (EV_A);
654	}	998	}
655		999
656	/* update fd-related kernel structures */	1000	/* update fd-related kernel structures */
657	fd_reify ();	1001	fd_reify (EV_A);
658		1002
659	/* calculate blocking time */	1003	/* calculate blocking time */
660		1004
661	/* we only need this for !monotonic clockor timers, but as we basically	1005	/* we only need this for !monotonic clockor timers, but as we basically
662	always have timers, we just calculate it always */	1006	always have timers, we just calculate it always */
		1007	#if EV_USE_MONOTONIC
		1008	if (expect_true (have_monotonic))
		1009	time_update_monotonic (EV_A);
		1010	else
		1011	#endif
		1012	{
663	ev_now = ev_time ();	1013	rt_now = ev_time ();
		1014	mn_now = rt_now;
		1015	}
664		1016
665	if (flags & EVLOOP_NONBLOCK || idlecnt)	1017	if (flags & EVLOOP_NONBLOCK || idlecnt)
666	block = 0.;	1018	block = 0.;
667	else	1019	else
668	{	1020	{
669	block = MAX_BLOCKTIME;	1021	block = MAX_BLOCKTIME;
670		1022
671	if (timercnt)	1023	if (timercnt)
672	{	1024	{
673	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1025	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
674	if (block > to) block = to;	1026	if (block > to) block = to;
675	}	1027	}
676		1028
677	if (periodiccnt)	1029	if (periodiccnt)
678	{	1030	{
679	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
680	if (block > to) block = to;	1032	if (block > to) block = to;
681	}	1033	}
682		1034
683	if (block < 0.) block = 0.;	1035	if (block < 0.) block = 0.;
684	}	1036	}
685		1037
686	method_poll (block);	1038	method_poll (EV_A_ block);
687		1039
688	/* update ev_now, do magic */	1040	/* update rt_now, do magic */
689	time_update ();	1041	time_update (EV_A);
690		1042
691	/* queue pending timers and reschedule them */	1043	/* queue pending timers and reschedule them */
692	timers_reify (); /* relative timers called last */	1044	timers_reify (EV_A); /* relative timers called last */
693	periodics_reify (); /* absolute timers called first */	1045	periodics_reify (EV_A); /* absolute timers called first */
694		1046
695	/* queue idle watchers unless io or timers are pending */	1047	/* queue idle watchers unless io or timers are pending */
696	if (!pendingcnt)	1048	if (!pendingcnt)
697	queue_events ((W *)idles, idlecnt, EV_IDLE);	1049	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
698		1050
699	/* queue check watchers, to be executed first */	1051	/* queue check watchers, to be executed first */
700	if (checkcnt)	1052	if (checkcnt)
701	queue_events ((W *)checks, checkcnt, EV_CHECK);	1053	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
702		1054
703	call_pending ();	1055	call_pending (EV_A);
704	}	1056	}
705	while (!ev_loop_done);	1057	while (activecnt && !loop_done);
706		1058
707	if (ev_loop_done != 2)	1059	if (loop_done != 2)
708	ev_loop_done = 0;	1060	loop_done = 0;
		1061	}
		1062
		1063	void
		1064	ev_unloop (EV_P_ int how)
		1065	{
		1066	loop_done = how;
709	}	1067	}
710		1068
711	/*****************************************************************************/	1069	/*****************************************************************************/
712		1070
713	static void	1071	inline void
714	wlist_add (WL *head, WL elem)	1072	wlist_add (WL *head, WL elem)
715	{	1073	{
716	elem->next = *head;	1074	elem->next = *head;
717	*head = elem;	1075	*head = elem;
718	}	1076	}
719		1077
720	static void	1078	inline void
721	wlist_del (WL *head, WL elem)	1079	wlist_del (WL *head, WL elem)
722	{	1080	{
723	while (*head)	1081	while (*head)
724	{	1082	{
725	if (*head == elem)	1083	if (*head == elem)
…		…
730		1088
731	head = &(*head)->next;	1089	head = &(*head)->next;
732	}	1090	}
733	}	1091	}
734		1092
735	static void	1093	inline void
736	ev_clear (W w)	1094	ev_clear_pending (EV_P_ W w)
737	{	1095	{
738	if (w->pending)	1096	if (w->pending)
739	{	1097	{
740	pendings [w->pending - 1].w = 0;	1098	pendings [ABSPRI (w)][w->pending - 1].w = 0;
741	w->pending = 0;	1099	w->pending = 0;
742	}	1100	}
743	}	1101	}
744		1102
745	static void	1103	inline void
746	ev_start (W w, int active)	1104	ev_start (EV_P_ W w, int active)
747	{	1105	{
		1106	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1107	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1108
748	w->active = active;	1109	w->active = active;
		1110	ev_ref (EV_A);
749	}	1111	}
750		1112
751	static void	1113	inline void
752	ev_stop (W w)	1114	ev_stop (EV_P_ W w)
753	{	1115	{
		1116	ev_unref (EV_A);
754	w->active = 0;	1117	w->active = 0;
755	}	1118	}
756		1119
757	/*****************************************************************************/	1120	/*****************************************************************************/
758		1121
759	void	1122	void
760	ev_io_start (struct ev_io *w)	1123	ev_io_start (EV_P_ struct ev_io *w)
761	{	1124	{
		1125	int fd = w->fd;
		1126
762	if (ev_is_active (w))	1127	if (ev_is_active (w))
763	return;	1128	return;
764		1129
765	int fd = w->fd;	1130	assert (("ev_io_start called with negative fd", fd >= 0));
766		1131
767	ev_start ((W)w, 1);	1132	ev_start (EV_A_ (W)w, 1);
768	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1133	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
769	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1134	wlist_add ((WL *)&anfds[fd].head, (WL)w);
770		1135
771	fd_change (fd);	1136	fd_change (EV_A_ fd);
772	}	1137	}
773		1138
774	void	1139	void
775	ev_io_stop (struct ev_io *w)	1140	ev_io_stop (EV_P_ struct ev_io *w)
776	{	1141	{
777	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
778	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
779	return;	1144	return;
780		1145
781	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1146	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
782	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
783		1148
784	fd_change (w->fd);	1149	fd_change (EV_A_ w->fd);
785	}	1150	}
786		1151
787	void	1152	void
788	ev_timer_start (struct ev_timer *w)	1153	ev_timer_start (EV_P_ struct ev_timer *w)
789	{	1154	{
790	if (ev_is_active (w))	1155	if (ev_is_active (w))
791	return;	1156	return;
792		1157
793	w->at += now;	1158	((WT)w)->at += mn_now;
794		1159
795	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1160	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
796		1161
797	ev_start ((W)w, ++timercnt);	1162	ev_start (EV_A_ (W)w, ++timercnt);
798	array_needsize (timers, timermax, timercnt, );	1163	array_needsize (timers, timermax, timercnt, );
799	timers [timercnt - 1] = w;	1164	timers [timercnt - 1] = w;
800	upheap ((WT *)timers, timercnt - 1);	1165	upheap ((WT *)timers, timercnt - 1);
801	}
802		1166
		1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1168	}
		1169
803	void	1170	void
804	ev_timer_stop (struct ev_timer *w)	1171	ev_timer_stop (EV_P_ struct ev_timer *w)
805	{	1172	{
806	ev_clear ((W)w);	1173	ev_clear_pending (EV_A_ (W)w);
807	if (!ev_is_active (w))	1174	if (!ev_is_active (w))
808	return;	1175	return;
809		1176
		1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1178
810	if (w->active < timercnt--)	1179	if (((W)w)->active < timercnt--)
811	{	1180	{
812	timers [w->active - 1] = timers [timercnt];	1181	timers [((W)w)->active - 1] = timers [timercnt];
813	downheap ((WT *)timers, timercnt, w->active - 1);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
814	}	1183	}
815		1184
816	w->at = w->repeat;	1185	((WT)w)->at = w->repeat;
817		1186
818	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
819	}	1188	}
820		1189
821	void	1190	void
822	ev_timer_again (struct ev_timer *w)	1191	ev_timer_again (EV_P_ struct ev_timer *w)
823	{	1192	{
824	if (ev_is_active (w))	1193	if (ev_is_active (w))
825	{	1194	{
826	if (w->repeat)	1195	if (w->repeat)
827	{	1196	{
828	w->at = now + w->repeat;	1197	((WT)w)->at = mn_now + w->repeat;
829	downheap ((WT *)timers, timercnt, w->active - 1);	1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
830	}	1199	}
831	else	1200	else
832	ev_timer_stop (w);	1201	ev_timer_stop (EV_A_ w);
833	}	1202	}
834	else if (w->repeat)	1203	else if (w->repeat)
835	ev_timer_start (w);	1204	ev_timer_start (EV_A_ w);
836	}	1205	}
837		1206
838	void	1207	void
839	ev_periodic_start (struct ev_periodic *w)	1208	ev_periodic_start (EV_P_ struct ev_periodic *w)
840	{	1209	{
841	if (ev_is_active (w))	1210	if (ev_is_active (w))
842	return;	1211	return;
843		1212
844	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1213	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
845		1214
846	/* this formula differs from the one in periodic_reify because we do not always round up */	1215	/* this formula differs from the one in periodic_reify because we do not always round up */
847	if (w->interval)	1216	if (w->interval)
848	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1217	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
849		1218
850	ev_start ((W)w, ++periodiccnt);	1219	ev_start (EV_A_ (W)w, ++periodiccnt);
851	array_needsize (periodics, periodicmax, periodiccnt, );	1220	array_needsize (periodics, periodicmax, periodiccnt, );
852	periodics [periodiccnt - 1] = w;	1221	periodics [periodiccnt - 1] = w;
853	upheap ((WT *)periodics, periodiccnt - 1);	1222	upheap ((WT *)periodics, periodiccnt - 1);
854	}
855		1223
		1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1225	}
		1226
856	void	1227	void
857	ev_periodic_stop (struct ev_periodic *w)	1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)
858	{	1229	{
859	ev_clear ((W)w);	1230	ev_clear_pending (EV_A_ (W)w);
860	if (!ev_is_active (w))	1231	if (!ev_is_active (w))
861	return;	1232	return;
862		1233
		1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1235
863	if (w->active < periodiccnt--)	1236	if (((W)w)->active < periodiccnt--)
864	{	1237	{
865	periodics [w->active - 1] = periodics [periodiccnt];	1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];
866	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
867	}	1240	}
868		1241
869	ev_stop ((W)w);	1242	ev_stop (EV_A_ (W)w);
870	}	1243	}
871		1244
872	void	1245	void
873	ev_signal_start (struct ev_signal *w)	1246	ev_idle_start (EV_P_ struct ev_idle *w)
874	{	1247	{
875	if (ev_is_active (w))	1248	if (ev_is_active (w))
876	return;	1249	return;
877		1250
		1251	ev_start (EV_A_ (W)w, ++idlecnt);
		1252	array_needsize (idles, idlemax, idlecnt, );
		1253	idles [idlecnt - 1] = w;
		1254	}
		1255
		1256	void
		1257	ev_idle_stop (EV_P_ struct ev_idle *w)
		1258	{
		1259	ev_clear_pending (EV_A_ (W)w);
		1260	if (ev_is_active (w))
		1261	return;
		1262
		1263	idles [((W)w)->active - 1] = idles [--idlecnt];
		1264	ev_stop (EV_A_ (W)w);
		1265	}
		1266
		1267	void
		1268	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1269	{
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	ev_start (EV_A_ (W)w, ++preparecnt);
		1274	array_needsize (prepares, preparemax, preparecnt, );
		1275	prepares [preparecnt - 1] = w;
		1276	}
		1277
		1278	void
		1279	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1280	{
		1281	ev_clear_pending (EV_A_ (W)w);
		1282	if (ev_is_active (w))
		1283	return;
		1284
		1285	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1286	ev_stop (EV_A_ (W)w);
		1287	}
		1288
		1289	void
		1290	ev_check_start (EV_P_ struct ev_check *w)
		1291	{
		1292	if (ev_is_active (w))
		1293	return;
		1294
		1295	ev_start (EV_A_ (W)w, ++checkcnt);
		1296	array_needsize (checks, checkmax, checkcnt, );
		1297	checks [checkcnt - 1] = w;
		1298	}
		1299
		1300	void
		1301	ev_check_stop (EV_P_ struct ev_check *w)
		1302	{
		1303	ev_clear_pending (EV_A_ (W)w);
		1304	if (ev_is_active (w))
		1305	return;
		1306
		1307	checks [((W)w)->active - 1] = checks [--checkcnt];
		1308	ev_stop (EV_A_ (W)w);
		1309	}
		1310
		1311	#ifndef SA_RESTART
		1312	# define SA_RESTART 0
		1313	#endif
		1314
		1315	void
		1316	ev_signal_start (EV_P_ struct ev_signal *w)
		1317	{
		1318	#if EV_MULTIPLICITY
		1319	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1320	#endif
		1321	if (ev_is_active (w))
		1322	return;
		1323
		1324	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1325
878	ev_start ((W)w, 1);	1326	ev_start (EV_A_ (W)w, 1);
879	array_needsize (signals, signalmax, w->signum, signals_init);	1327	array_needsize (signals, signalmax, w->signum, signals_init);
880	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
881		1329
882	if (!w->next)	1330	if (!((WL)w)->next)
883	{	1331	{
		1332	#if WIN32
		1333	signal (w->signum, sighandler);
		1334	#else
884	struct sigaction sa;	1335	struct sigaction sa;
885	sa.sa_handler = sighandler;	1336	sa.sa_handler = sighandler;
886	sigfillset (&sa.sa_mask);	1337	sigfillset (&sa.sa_mask);
887	sa.sa_flags = 0;	1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
888	sigaction (w->signum, &sa, 0);	1339	sigaction (w->signum, &sa, 0);
		1340	#endif
889	}	1341	}
890	}	1342	}
891		1343
892	void	1344	void
893	ev_signal_stop (struct ev_signal *w)	1345	ev_signal_stop (EV_P_ struct ev_signal *w)
894	{	1346	{
895	ev_clear ((W)w);	1347	ev_clear_pending (EV_A_ (W)w);
896	if (!ev_is_active (w))	1348	if (!ev_is_active (w))
897	return;	1349	return;
898		1350
899	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1351	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
900	ev_stop ((W)w);	1352	ev_stop (EV_A_ (W)w);
901		1353
902	if (!signals [w->signum - 1].head)	1354	if (!signals [w->signum - 1].head)
903	signal (w->signum, SIG_DFL);	1355	signal (w->signum, SIG_DFL);
904	}	1356	}
905		1357
906	void	1358	void
907	ev_idle_start (struct ev_idle *w)	1359	ev_child_start (EV_P_ struct ev_child *w)
908	{	1360	{
		1361	#if EV_MULTIPLICITY
		1362	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1363	#endif
909	if (ev_is_active (w))	1364	if (ev_is_active (w))
910	return;	1365	return;
911		1366
912	ev_start ((W)w, ++idlecnt);	1367	ev_start (EV_A_ (W)w, 1);
913	array_needsize (idles, idlemax, idlecnt, );	1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
914	idles [idlecnt - 1] = w;
915	}	1369	}
916		1370
917	void	1371	void
918	ev_idle_stop (struct ev_idle *w)	1372	ev_child_stop (EV_P_ struct ev_child *w)
919	{	1373	{
920	ev_clear ((W)w);	1374	ev_clear_pending (EV_A_ (W)w);
921	if (ev_is_active (w))	1375	if (ev_is_active (w))
922	return;	1376	return;
923		1377
924	idles [w->active - 1] = idles [--idlecnt];
925	ev_stop ((W)w);
926	}
927
928	void
929	ev_prepare_start (struct ev_prepare *w)
930	{
931	if (ev_is_active (w))
932	return;
933
934	ev_start ((W)w, ++preparecnt);
935	array_needsize (prepares, preparemax, preparecnt, );
936	prepares [preparecnt - 1] = w;
937	}
938
939	void
940	ev_prepare_stop (struct ev_prepare *w)
941	{
942	ev_clear ((W)w);
943	if (ev_is_active (w))
944	return;
945
946	prepares [w->active - 1] = prepares [--preparecnt];
947	ev_stop ((W)w);
948	}
949
950	void
951	ev_check_start (struct ev_check *w)
952	{
953	if (ev_is_active (w))
954	return;
955
956	ev_start ((W)w, ++checkcnt);
957	array_needsize (checks, checkmax, checkcnt, );
958	checks [checkcnt - 1] = w;
959	}
960
961	void
962	ev_check_stop (struct ev_check *w)
963	{
964	ev_clear ((W)w);
965	if (ev_is_active (w))
966	return;
967
968	checks [w->active - 1] = checks [--checkcnt];
969	ev_stop ((W)w);
970	}
971
972	void
973	ev_child_start (struct ev_child *w)
974	{
975	if (ev_is_active (w))
976	return;
977
978	ev_start ((W)w, 1);
979	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	}
981
982	void
983	ev_child_stop (struct ev_child *w)
984	{
985	ev_clear ((W)w);
986	if (ev_is_active (w))
987	return;
988
989	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1378	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
990	ev_stop ((W)w);	1379	ev_stop (EV_A_ (W)w);
991	}	1380	}
992		1381
993	/*****************************************************************************/	1382	/*****************************************************************************/
994		1383
995	struct ev_once	1384	struct ev_once
…		…
999	void (*cb)(int revents, void *arg);	1388	void (*cb)(int revents, void *arg);
1000	void *arg;	1389	void *arg;
1001	};	1390	};
1002		1391
1003	static void	1392	static void
1004	once_cb (struct ev_once *once, int revents)	1393	once_cb (EV_P_ struct ev_once *once, int revents)
1005	{	1394	{
1006	void (*cb)(int revents, void *arg) = once->cb;	1395	void (*cb)(int revents, void *arg) = once->cb;
1007	void *arg = once->arg;	1396	void *arg = once->arg;
1008		1397
1009	ev_io_stop (&once->io);	1398	ev_io_stop (EV_A_ &once->io);
1010	ev_timer_stop (&once->to);	1399	ev_timer_stop (EV_A_ &once->to);
1011	free (once);	1400	free (once);
1012		1401
1013	cb (revents, arg);	1402	cb (revents, arg);
1014	}	1403	}
1015		1404
1016	static void	1405	static void
1017	once_cb_io (struct ev_io *w, int revents)	1406	once_cb_io (EV_P_ struct ev_io *w, int revents)
1018	{	1407	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1408	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1020	}	1409	}
1021		1410
1022	static void	1411	static void
1023	once_cb_to (struct ev_timer *w, int revents)	1412	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1024	{	1413	{
1025	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1414	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1026	}	1415	}
1027		1416
1028	void	1417	void
1029	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1418	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1030	{	1419	{
1031	struct ev_once *once = malloc (sizeof (struct ev_once));	1420	struct ev_once *once = malloc (sizeof (struct ev_once));
1032		1421
1033	if (!once)	1422	if (!once)
1034	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1423	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1039		1428
1040	ev_watcher_init (&once->io, once_cb_io);	1429	ev_watcher_init (&once->io, once_cb_io);
1041	if (fd >= 0)	1430	if (fd >= 0)
1042	{	1431	{
1043	ev_io_set (&once->io, fd, events);	1432	ev_io_set (&once->io, fd, events);
1044	ev_io_start (&once->io);	1433	ev_io_start (EV_A_ &once->io);
1045	}	1434	}
1046		1435
1047	ev_watcher_init (&once->to, once_cb_to);	1436	ev_watcher_init (&once->to, once_cb_to);
1048	if (timeout >= 0.)	1437	if (timeout >= 0.)
1049	{	1438	{
1050	ev_timer_set (&once->to, timeout, 0.);	1439	ev_timer_set (&once->to, timeout, 0.);
1051	ev_timer_start (&once->to);	1440	ev_timer_start (EV_A_ &once->to);
1052	}	1441	}
1053	}	1442	}
1054	}	1443	}
1055		1444
1056	/*****************************************************************************/
1057
1058	#if 0
1059
1060	struct ev_io wio;
1061
1062	static void
1063	sin_cb (struct ev_io *w, int revents)
1064	{
1065	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1066	}
1067
1068	static void
1069	ocb (struct ev_timer *w, int revents)
1070	{
1071	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1072	ev_timer_stop (w);
1073	ev_timer_start (w);
1074	}
1075
1076	static void
1077	scb (struct ev_signal *w, int revents)
1078	{
1079	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1080	ev_io_stop (&wio);
1081	ev_io_start (&wio);
1082	}
1083
1084	static void
1085	gcb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "generic %x\n", revents);
1088
1089	}
1090
1091	int main (void)
1092	{
1093	ev_init (0);
1094
1095	ev_io_init (&wio, sin_cb, 0, EV_READ);
1096	ev_io_start (&wio);
1097
1098	struct ev_timer t[10000];
1099
1100	#if 0
1101	int i;
1102	for (i = 0; i < 10000; ++i)
1103	{
1104	struct ev_timer *w = t + i;
1105	ev_watcher_init (w, ocb, i);
1106	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1107	ev_timer_start (w);
1108	if (drand48 () < 0.5)
1109	ev_timer_stop (w);
1110	}
1111	#endif
1112
1113	struct ev_timer t1;
1114	ev_timer_init (&t1, ocb, 5, 10);
1115	ev_timer_start (&t1);
1116
1117	struct ev_signal sig;
1118	ev_signal_init (&sig, scb, SIGQUIT);
1119	ev_signal_start (&sig);
1120
1121	struct ev_check cw;
1122	ev_check_init (&cw, gcb);
1123	ev_check_start (&cw);
1124
1125	struct ev_idle iw;
1126	ev_idle_init (&iw, gcb);
1127	ev_idle_start (&iw);
1128
1129	ev_loop (0);
1130
1131	return 0;
1132	}
1133
1134	#endif
1135
1136
1137
1138

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