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Comparing libev/ev.c (file contents):
Revision 1.28 by root, Thu Nov 1 06:48:49 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	*/
		31	#ifndef EV_STANDALONE
		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
		55	#endif
29		56
30	#include <math.h>	57	#include <math.h>
31	#include <stdlib.h>	58	#include <stdlib.h>
32	#include <unistd.h>	59	#include <unistd.h>
33	#include <fcntl.h>	60	#include <fcntl.h>
…		…
37	#include <stdio.h>	64	#include <stdio.h>
38		65
39	#include <assert.h>	66	#include <assert.h>
40	#include <errno.h>	67	#include <errno.h>
41	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
42	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
43	#include <sys/time.h>	72	#include <sys/time.h>
44	#include <time.h>	73	#include <time.h>
45		74
		75	/**/
		76
46	#ifndef HAVE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
47	# ifdef CLOCK_MONOTONIC
48	# define HAVE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
		79	#endif
		80
		81	#ifndef EV_USE_SELECT
		82	# define EV_USE_SELECT 1
		83	#endif
		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
		89	#ifndef EV_USE_EPOLL
		90	# define EV_USE_EPOLL 0
		91	#endif
		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
49	# endif	102	# endif
50	#endif	103	#endif
51		104
52	#ifndef HAVE_SELECT
53	# define HAVE_SELECT 1
54	#endif
55
56	#ifndef HAVE_EPOLL
57	# define HAVE_EPOLL 0
58	#endif
59
60	#ifndef HAVE_REALTIME	105	#ifndef EV_USE_REALTIME
61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
62	#endif	107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
		116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
		118	# define EV_USE_REALTIME 0
		119	#endif
		120
		121	/**/
63		122
64	#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) */
65	#define MAX_BLOCKTIME 60.	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
67		127
68	#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)
69		143
70	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
71	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
72	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
73		147
74	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
75	ev_tstamp ev_now;
76	int ev_method;
77		149
78	static int have_monotonic; /* runtime */	150	#if WIN32
79		151	/* note: the comment below could not be substantiated, but what would I care */
80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
81	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
82	static void (*method_poll)(ev_tstamp timeout);	154	#endif
83		155
84	/*****************************************************************************/	156	/*****************************************************************************/
85		157
86	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
87	ev_time (void)	192	ev_time (void)
88	{	193	{
89	#if HAVE_REALTIME	194	#if EV_USE_REALTIME
90	struct timespec ts;	195	struct timespec ts;
91	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
92	return ts.tv_sec + ts.tv_nsec * 1e-9;	197	return ts.tv_sec + ts.tv_nsec * 1e-9;
93	#else	198	#else
94	struct timeval tv;	199	struct timeval tv;
95	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
96	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
97	#endif	202	#endif
98	}	203	}
99		204
100	static ev_tstamp	205	inline ev_tstamp
101	get_clock (void)	206	get_clock (void)
102	{	207	{
103	#if HAVE_MONOTONIC	208	#if EV_USE_MONOTONIC
104	if (have_monotonic)	209	if (expect_true (have_monotonic))
105	{	210	{
106	struct timespec ts;	211	struct timespec ts;
107	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
108	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
109	}	214	}
110	#endif	215	#endif
111		216
112	return ev_time ();	217	return ev_time ();
113	}	218	}
114		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
		226	#define array_roundsize(base,n) ((n) | 4 & ~3)
		227
115	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
116	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
117	{ \	230	{ \
118	int newcnt = cur; \	231	int newcnt = cur; \
119	do \	232	do \
120	{ \	233	{ \
121	newcnt = (newcnt << 1) | 4 & ~3; \	234	newcnt = array_roundsize (base, newcnt << 1); \
122	} \	235	} \
123	while ((cnt) > newcnt); \	236	while ((cnt) > newcnt); \
124	\	237	\
125	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
126	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
127	cur = newcnt; \	240	cur = newcnt; \
128	}	241	}
129		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
130	/*****************************************************************************/	254	/*****************************************************************************/
131
132	typedef struct
133	{
134	struct ev_io *head;
135	int events;
136	} ANFD;
137
138	static ANFD *anfds;
139	static int anfdmax;
140		255
141	static void	256	static void
142	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
143	{	258	{
144	while (count--)	259	while (count--)
145	{	260	{
146	base->head = 0;	261	base->head = 0;
147	base->events = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
148	++base;	265	++base;
149	}	266	}
150	}	267	}
151		268
152	typedef struct
153	{
154	W w;
155	int events;
156	} ANPENDING;
157
158	static ANPENDING *pendings;
159	static int pendingmax, pendingcnt;
160
161	static void	269	static void
162	event (W w, int events)	270	event (EV_P_ W w, int events)
163	{	271	{
164	if (w->active)	272	if (w->pending)
165	{	273	{
166	w->pending = ++pendingcnt;
167	array_needsize (pendings, pendingmax, pendingcnt, );
168	pendings [pendingcnt - 1].w = w;
169	pendings [pendingcnt - 1].events = events;	274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		275	return;
170	}	276	}
171	}
172		277
		278	w->pending = ++pendingcnt [ABSPRI (w)];
		279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		280	pendings [ABSPRI (w)][w->pending - 1].w = w;
		281	pendings [ABSPRI (w)][w->pending - 1].events = events;
		282	}
		283
173	static void	284	static void
174	queue_events (W *events, int eventcnt, int type)	285	queue_events (EV_P_ W *events, int eventcnt, int type)
175	{	286	{
176	int i;	287	int i;
177		288
178	for (i = 0; i < eventcnt; ++i)	289	for (i = 0; i < eventcnt; ++i)
179	event (events [i], type);	290	event (EV_A_ events [i], type);
180	}	291	}
181		292
182	static void	293	static void
183	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
184	{	295	{
185	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
186	struct ev_io *w;	297	struct ev_io *w;
187		298
188	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
189	{	300	{
190	int ev = w->events & events;	301	int ev = w->events & events;
191		302
192	if (ev)	303	if (ev)
193	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
194	}	305	}
195	}	306	}
196		307
197	/*****************************************************************************/	308	/*****************************************************************************/
198		309
199	static int *fdchanges;
200	static int fdchangemax, fdchangecnt;
201
202	static void	310	static void
203	fd_reify (void)	311	fd_reify (EV_P)
204	{	312	{
205	int i;	313	int i;
206		314
207	for (i = 0; i < fdchangecnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
208	{	316	{
…		…
210	ANFD *anfd = anfds + fd;	318	ANFD *anfd = anfds + fd;
211	struct ev_io *w;	319	struct ev_io *w;
212		320
213	int events = 0;	321	int events = 0;
214		322
215	for (w = anfd->head; w; w = w->next)	323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
216	events |= w->events;	324	events |= w->events;
217		325
218	anfd->events &= ~EV_REIFY;	326	anfd->reify = 0;
219		327
220	if (anfd->events != events)
221	{
222	method_modify (fd, anfd->events, events);	328	method_modify (EV_A_ fd, anfd->events, events);
223	anfd->events = events;	329	anfd->events = events;
224	}
225	}	330	}
226		331
227	fdchangecnt = 0;	332	fdchangecnt = 0;
228	}	333	}
229		334
230	static void	335	static void
231	fd_change (int fd)	336	fd_change (EV_P_ int fd)
232	{	337	{
233	if (anfds [fd].events & EV_REIFY)	338	if (anfds [fd].reify || fdchangecnt < 0)
234	return;	339	return;
235		340
236	anfds [fd].events |= EV_REIFY;	341	anfds [fd].reify = 1;
237		342
238	++fdchangecnt;	343	++fdchangecnt;
239	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
240	fdchanges [fdchangecnt - 1] = fd;	345	fdchanges [fdchangecnt - 1] = fd;
241	}	346	}
242		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
243	/* called on EBADF to verify fds */	360	/* called on EBADF to verify fds */
244	static void	361	static void
245	fd_recheck (void)	362	fd_ebadf (EV_P)
246	{	363	{
247	int fd;	364	int fd;
248		365
249	for (fd = 0; fd < anfdmax; ++fd)	366	for (fd = 0; fd < anfdmax; ++fd)
250	if (anfds [fd].events)	367	if (anfds [fd].events)
251	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
252	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)
253	{	380	{
254	event ((W)anfds [fd].head, EV_ERROR);	381	fd_kill (EV_A_ fd);
255	ev_io_stop (anfds [fd].head);	382	return;
256	}	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	}
257	}	399	}
258		400
259	/*****************************************************************************/	401	/*****************************************************************************/
260		402
261	static struct ev_timer **timers;
262	static int timermax, timercnt;
263
264	static struct ev_periodic **periodics;
265	static int periodicmax, periodiccnt;
266
267	static void	403	static void
268	upheap (WT *timers, int k)	404	upheap (WT *heap, int k)
269	{	405	{
270	WT w = timers [k];	406	WT w = heap [k];
271		407
272	while (k && timers [k >> 1]->at > w->at)	408	while (k && heap [k >> 1]->at > w->at)
273	{	409	{
274	timers [k] = timers [k >> 1];	410	heap [k] = heap [k >> 1];
275	timers [k]->active = k + 1;	411	((W)heap [k])->active = k + 1;
276	k >>= 1;	412	k >>= 1;
277	}	413	}
278		414
279	timers [k] = w;	415	heap [k] = w;
280	timers [k]->active = k + 1;	416	((W)heap [k])->active = k + 1;
281		417
282	}	418	}
283		419
284	static void	420	static void
285	downheap (WT *timers, int N, int k)	421	downheap (WT *heap, int N, int k)
286	{	422	{
287	WT w = timers [k];	423	WT w = heap [k];
288		424
289	while (k < (N >> 1))	425	while (k < (N >> 1))
290	{	426	{
291	int j = k << 1;	427	int j = k << 1;
292		428
293	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	429	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
294	++j;	430	++j;
295		431
296	if (w->at <= timers [j]->at)	432	if (w->at <= heap [j]->at)
297	break;	433	break;
298		434
299	timers [k] = timers [j];	435	heap [k] = heap [j];
300	timers [k]->active = k + 1;	436	((W)heap [k])->active = k + 1;
301	k = j;	437	k = j;
302	}	438	}
303		439
304	timers [k] = w;	440	heap [k] = w;
305	timers [k]->active = k + 1;	441	((W)heap [k])->active = k + 1;
306	}	442	}
307		443
308	/*****************************************************************************/	444	/*****************************************************************************/
309		445
310	typedef struct	446	typedef struct
311	{	447	{
312	struct ev_signal *head;	448	WL head;
313	sig_atomic_t gotsig;	449	sig_atomic_t volatile gotsig;
314	} ANSIG;	450	} ANSIG;
315		451
316	static ANSIG *signals;	452	static ANSIG *signals;
317	static int signalmax;	453	static int signalmax;
318		454
319	static int sigpipe [2];	455	static int sigpipe [2];
320	static sig_atomic_t gotsig;	456	static sig_atomic_t volatile gotsig;
321	static struct ev_io sigev;	457	static struct ev_io sigev;
322		458
323	static void	459	static void
324	signals_init (ANSIG *base, int count)	460	signals_init (ANSIG *base, int count)
325	{	461	{
326	while (count--)	462	while (count--)
327	{	463	{
328	base->head = 0;	464	base->head = 0;
329	base->gotsig = 0;	465	base->gotsig = 0;
		466
330	++base;	467	++base;
331	}	468	}
332	}	469	}
333		470
334	static void	471	static void
335	sighandler (int signum)	472	sighandler (int signum)
336	{	473	{
		474	#if WIN32
		475	signal (signum, sighandler);
		476	#endif
		477
337	signals [signum - 1].gotsig = 1;	478	signals [signum - 1].gotsig = 1;
338		479
339	if (!gotsig)	480	if (!gotsig)
340	{	481	{
		482	int old_errno = errno;
341	gotsig = 1;	483	gotsig = 1;
342	write (sigpipe [1], &gotsig, 1);	484	write (sigpipe [1], &signum, 1);
		485	errno = old_errno;
343	}	486	}
344	}	487	}
345		488
346	static void	489	static void
347	sigcb (struct ev_io *iow, int revents)	490	sigcb (EV_P_ struct ev_io *iow, int revents)
348	{	491	{
349	struct ev_signal *w;	492	WL w;
350	int sig;	493	int signum;
351		494
		495	read (sigpipe [0], &revents, 1);
352	gotsig = 0;	496	gotsig = 0;
353	read (sigpipe [0], &revents, 1);
354		497
355	for (sig = signalmax; sig--; )	498	for (signum = signalmax; signum--; )
356	if (signals [sig].gotsig)	499	if (signals [signum].gotsig)
357	{	500	{
358	signals [sig].gotsig = 0;	501	signals [signum].gotsig = 0;
359		502
360	for (w = signals [sig].head; w; w = w->next)	503	for (w = signals [signum].head; w; w = w->next)
361	event ((W)w, EV_SIGNAL);	504	event (EV_A_ (W)w, EV_SIGNAL);
362	}	505	}
363	}	506	}
364		507
365	static void	508	static void
366	siginit (void)	509	siginit (EV_P)
367	{	510	{
		511	#ifndef WIN32
368	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	512	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
369	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
370		514
371	/* rather than sort out wether we really need nb, set it */	515	/* rather than sort out wether we really need nb, set it */
372	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	516	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
373	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		518	#endif
374		519
375	ev_io_set (&sigev, sigpipe [0], EV_READ);	520	ev_io_set (&sigev, sigpipe [0], EV_READ);
376	ev_io_start (&sigev);	521	ev_io_start (EV_A_ &sigev);
		522	ev_unref (EV_A); /* child watcher should not keep loop alive */
377	}	523	}
378		524
379	/*****************************************************************************/	525	/*****************************************************************************/
380		526
381	static struct ev_idle **idles;	527	#ifndef WIN32
382	static int idlemax, idlecnt;
383
384	static struct ev_prepare **prepares;
385	static int preparemax, preparecnt;
386
387	static struct ev_check **checks;
388	static int checkmax, checkcnt;
389
390	/*****************************************************************************/
391		528
392	static struct ev_child *childs [PID_HASHSIZE];	529	static struct ev_child *childs [PID_HASHSIZE];
393	static struct ev_signal childev;	530	static struct ev_signal childev;
394		531
395	#ifndef WCONTINUED	532	#ifndef WCONTINUED
396	# define WCONTINUED 0	533	# define WCONTINUED 0
397	#endif	534	#endif
398		535
399	static void	536	static void
400	childcb (struct ev_signal *sw, int revents)	537	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
401	{	538	{
402	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	{
403	int pid, status;	554	int pid, status;
404		555
405	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	556	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
406	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	557	{
407	if (w->pid == pid || w->pid == -1)	558	/* make sure we are called again until all childs have been reaped */
408	{	559	event (EV_A_ (W)sw, EV_SIGNAL);
409	w->status = status;	560
410	event ((W)w, EV_CHILD);	561	child_reap (EV_A_ sw, pid, pid, status);
411	}	562	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		563	}
412	}	564	}
		565
		566	#endif
413		567
414	/*****************************************************************************/	568	/*****************************************************************************/
415		569
		570	#if EV_USE_KQUEUE
		571	# include "ev_kqueue.c"
		572	#endif
416	#if HAVE_EPOLL	573	#if EV_USE_EPOLL
417	# include "ev_epoll.c"	574	# include "ev_epoll.c"
418	#endif	575	#endif
		576	#if EV_USE_POLL
		577	# include "ev_poll.c"
		578	#endif
419	#if HAVE_SELECT	579	#if EV_USE_SELECT
420	# include "ev_select.c"	580	# include "ev_select.c"
421	#endif	581	#endif
422		582
423	int	583	int
424	ev_version_major (void)	584	ev_version_major (void)
…		…
430	ev_version_minor (void)	590	ev_version_minor (void)
431	{	591	{
432	return EV_VERSION_MINOR;	592	return EV_VERSION_MINOR;
433	}	593	}
434		594
435	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)
436	{	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	{
437	if (!ev_method)	616	if (!method)
438	{	617	{
439	#if HAVE_MONOTONIC	618	#if EV_USE_MONOTONIC
440	{	619	{
441	struct timespec ts;	620	struct timespec ts;
442	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	621	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
443	have_monotonic = 1;	622	have_monotonic = 1;
444	}	623	}
445	#endif	624	#endif
446		625
447	ev_now = ev_time ();	626	rt_now = ev_time ();
448	now = get_clock ();	627	mn_now = get_clock ();
		628	now_floor = mn_now;
449	diff = ev_now - now;	629	rtmn_diff = rt_now - mn_now;
450		630
		631	if (methods == EVMETHOD_AUTO)
		632	if (!enable_secure () && getenv ("LIBEV_METHODS"))
		633	methods = atoi (getenv ("LIBEV_METHODS"));
		634	else
		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
		644	#if EV_USE_EPOLL
		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);
		649	#endif
		650	#if EV_USE_SELECT
		651	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
		652	#endif
		653	}
		654	}
		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])
451	if (pipe (sigpipe))	745	if (pipe (sigpipe))
452	return 0;	746	return 0;
453		747
454	ev_method = EVMETHOD_NONE;	748	if (!default_loop)
455	#if HAVE_EPOLL	749	{
456	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	750	#if EV_MULTIPLICITY
		751	struct ev_loop *loop = default_loop = &default_loop_struct;
		752	#else
		753	default_loop = 1;
457	#endif	754	#endif
458	#if HAVE_SELECT
459	if (ev_method == EVMETHOD_NONE) select_init (flags);
460	#endif
461		755
		756	loop_init (EV_A_ methods);
		757
462	if (ev_method)	758	if (ev_method (EV_A))
463	{	759	{
464	ev_watcher_init (&sigev, sigcb);	760	ev_watcher_init (&sigev, sigcb);
		761	ev_set_priority (&sigev, EV_MAXPRI);
465	siginit ();	762	siginit (EV_A);
466		763
		764	#ifndef WIN32
467	ev_signal_init (&childev, childcb, SIGCHLD);	765	ev_signal_init (&childev, childcb, SIGCHLD);
		766	ev_set_priority (&childev, EV_MAXPRI);
468	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
469	}	770	}
		771	else
		772	default_loop = 0;
470	}	773	}
471		774
472	return ev_method;	775	return default_loop;
473	}	776	}
474		777
475	/*****************************************************************************/
476
477	void	778	void
478	ev_prefork (void)	779	ev_default_destroy (void)
479	{	780	{
480	/* nop */	781	#if EV_MULTIPLICITY
481	}	782	struct ev_loop *loop = default_loop;
482
483	void
484	ev_postfork_parent (void)
485	{
486	/* nop */
487	}
488
489	void
490	ev_postfork_child (void)
491	{
492	#if HAVE_EPOLL
493	if (ev_method == EVMETHOD_EPOLL)
494	epoll_postfork_child ();
495	#endif	783	#endif
496		784
		785	ev_ref (EV_A); /* child watcher */
		786	ev_signal_stop (EV_A_ &childev);
		787
		788	ev_ref (EV_A); /* signal watcher */
497	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);
498	close (sigpipe [0]);	807	close (sigpipe [0]);
499	close (sigpipe [1]);	808	close (sigpipe [1]);
500	pipe (sigpipe);	809	pipe (sigpipe);
		810
		811	ev_ref (EV_A); /* signal watcher */
501	siginit ();	812	siginit (EV_A);
502	}	813	}
503		814
504	/*****************************************************************************/	815	/*****************************************************************************/
505		816
506	static void	817	static void
507	call_pending (void)	818	call_pending (EV_P)
508	{	819	{
		820	int pri;
		821
		822	for (pri = NUMPRI; pri--; )
509	while (pendingcnt)	823	while (pendingcnt [pri])
510	{	824	{
511	ANPENDING *p = pendings + --pendingcnt;	825	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
512		826
513	if (p->w)	827	if (p->w)
514	{	828	{
515	p->w->pending = 0;	829	p->w->pending = 0;
516	p->w->cb (p->w, p->events);	830	p->w->cb (EV_A_ p->w, p->events);
517	}	831	}
518	}	832	}
519	}	833	}
520		834
521	static void	835	static void
522	timers_reify (void)	836	timers_reify (EV_P)
523	{	837	{
524	while (timercnt && timers [0]->at <= now)	838	while (timercnt && ((WT)timers [0])->at <= mn_now)
525	{	839	{
526	struct ev_timer *w = timers [0];	840	struct ev_timer *w = timers [0];
527		841
528	event ((W)w, EV_TIMEOUT);	842	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		843
530	/* first reschedule or stop timer */	844	/* first reschedule or stop timer */
531	if (w->repeat)	845	if (w->repeat)
532	{	846	{
		847	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	848	((WT)w)->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	849	downheap ((WT *)timers, timercnt, 0);
536	}	850	}
537	else	851	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	852	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539	}
540	}
541		853
		854	event (EV_A_ (W)w, EV_TIMEOUT);
		855	}
		856	}
		857
542	static void	858	static void
543	periodics_reify (void)	859	periodics_reify (EV_P)
544	{	860	{
545	while (periodiccnt && periodics [0]->at <= ev_now)	861	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
546	{	862	{
547	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)));
548		866
549	/* first reschedule or stop timer */	867	/* first reschedule or stop timer */
550	if (w->interval)	868	if (w->interval)
551	{	869	{
552	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;
553	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));
554	downheap ((WT *)periodics, periodiccnt, 0);	872	downheap ((WT *)periodics, periodiccnt, 0);
555	}	873	}
556	else	874	else
557	ev_periodic_stop (w); /* nonrepeating: stop timer */	875	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
558		876
559	event ((W)w, EV_TIMEOUT);	877	event (EV_A_ (W)w, EV_PERIODIC);
560	}	878	}
561	}	879	}
562		880
563	static void	881	static void
564	periodics_reschedule (ev_tstamp diff)	882	periodics_reschedule (EV_P)
565	{	883	{
566	int i;	884	int i;
567		885
568	/* adjust periodics after time jump */	886	/* adjust periodics after time jump */
569	for (i = 0; i < periodiccnt; ++i)	887	for (i = 0; i < periodiccnt; ++i)
570	{	888	{
571	struct ev_periodic *w = periodics [i];	889	struct ev_periodic *w = periodics [i];
572		890
573	if (w->interval)	891	if (w->interval)
574	{	892	{
575	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;
576		894
577	if (fabs (diff) >= 1e-4)	895	if (fabs (diff) >= 1e-4)
578	{	896	{
579	ev_periodic_stop (w);	897	ev_periodic_stop (EV_A_ w);
580	ev_periodic_start (w);	898	ev_periodic_start (EV_A_ w);
581		899
582	i = 0; /* restart loop, inefficient, but time jumps should be rare */	900	i = 0; /* restart loop, inefficient, but time jumps should be rare */
583	}	901	}
584	}	902	}
585	}	903	}
586	}	904	}
587		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
588	static void	924	static void
589	time_update (void)	925	time_update (EV_P)
590	{	926	{
591	int i;	927	int i;
592		928
593	ev_now = ev_time ();	929	#if EV_USE_MONOTONIC
594
595	if (have_monotonic)	930	if (expect_true (have_monotonic))
596	{	931	{
597	ev_tstamp odiff = diff;	932	if (time_update_monotonic (EV_A))
598
599	for (i = 4; --i; ) /* loop a few times, before making important decisions */
600	{	933	{
601	now = get_clock ();	934	ev_tstamp odiff = rtmn_diff;
		935
		936	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		937	{
602	diff = ev_now - now;	938	rtmn_diff = rt_now - mn_now;
603		939
604	if (fabs (odiff - diff) < MIN_TIMEJUMP)	940	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
605	return; /* all is well */	941	return; /* all is well */
606		942
607	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) */
608	}	951	}
609
610	periodics_reschedule (diff - odiff);
611	/* no timer adjustment, as the monotonic clock doesn't jump */
612	}	952	}
613	else	953	else
		954	#endif
614	{	955	{
615	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))
616	{	959	{
617	periodics_reschedule (ev_now - now);	960	periodics_reschedule (EV_A);
618		961
619	/* 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 */
620	for (i = 0; i < timercnt; ++i)	963	for (i = 0; i < timercnt; ++i)
621	timers [i]->at += diff;	964	((WT)timers [i])->at += rt_now - mn_now;
622	}	965	}
623		966
624	now = ev_now;	967	mn_now = rt_now;
625	}	968	}
626	}	969	}
627		970
628	int ev_loop_done;	971	void
		972	ev_ref (EV_P)
		973	{
		974	++activecnt;
		975	}
629		976
		977	void
		978	ev_unref (EV_P)
		979	{
		980	--activecnt;
		981	}
		982
		983	static int loop_done;
		984
		985	void
630	void ev_loop (int flags)	986	ev_loop (EV_P_ int flags)
631	{	987	{
632	double block;	988	double block;
633	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	989	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
634		990
635	do	991	do
636	{	992	{
637	/* queue check watchers (and execute them) */	993	/* queue check watchers (and execute them) */
638	if (preparecnt)	994	if (expect_false (preparecnt))
639	{	995	{
640	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	996	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
641	call_pending ();	997	call_pending (EV_A);
642	}	998	}
643		999
644	/* update fd-related kernel structures */	1000	/* update fd-related kernel structures */
645	fd_reify ();	1001	fd_reify (EV_A);
646		1002
647	/* calculate blocking time */	1003	/* calculate blocking time */
648		1004
649	/* 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
650	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	{
651	ev_now = ev_time ();	1013	rt_now = ev_time ();
		1014	mn_now = rt_now;
		1015	}
652		1016
653	if (flags & EVLOOP_NONBLOCK || idlecnt)	1017	if (flags & EVLOOP_NONBLOCK || idlecnt)
654	block = 0.;	1018	block = 0.;
655	else	1019	else
656	{	1020	{
657	block = MAX_BLOCKTIME;	1021	block = MAX_BLOCKTIME;
658		1022
659	if (timercnt)	1023	if (timercnt)
660	{	1024	{
661	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;
662	if (block > to) block = to;	1026	if (block > to) block = to;
663	}	1027	}
664		1028
665	if (periodiccnt)	1029	if (periodiccnt)
666	{	1030	{
667	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1031	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
668	if (block > to) block = to;	1032	if (block > to) block = to;
669	}	1033	}
670		1034
671	if (block < 0.) block = 0.;	1035	if (block < 0.) block = 0.;
672	}	1036	}
673		1037
674	method_poll (block);	1038	method_poll (EV_A_ block);
675		1039
676	/* update ev_now, do magic */	1040	/* update rt_now, do magic */
677	time_update ();	1041	time_update (EV_A);
678		1042
679	/* queue pending timers and reschedule them */	1043	/* queue pending timers and reschedule them */
680	timers_reify (); /* relative timers called last */	1044	timers_reify (EV_A); /* relative timers called last */
681	periodics_reify (); /* absolute timers called first */	1045	periodics_reify (EV_A); /* absolute timers called first */
682		1046
683	/* queue idle watchers unless io or timers are pending */	1047	/* queue idle watchers unless io or timers are pending */
684	if (!pendingcnt)	1048	if (!pendingcnt)
685	queue_events ((W *)idles, idlecnt, EV_IDLE);	1049	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
686		1050
687	/* queue check watchers, to be executed first */	1051	/* queue check watchers, to be executed first */
688	if (checkcnt)	1052	if (checkcnt)
689	queue_events ((W *)checks, checkcnt, EV_CHECK);	1053	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
690		1054
691	call_pending ();	1055	call_pending (EV_A);
692	}	1056	}
693	while (!ev_loop_done);	1057	while (activecnt && !loop_done);
694		1058
695	if (ev_loop_done != 2)	1059	if (loop_done != 2)
696	ev_loop_done = 0;	1060	loop_done = 0;
		1061	}
		1062
		1063	void
		1064	ev_unloop (EV_P_ int how)
		1065	{
		1066	loop_done = how;
697	}	1067	}
698		1068
699	/*****************************************************************************/	1069	/*****************************************************************************/
700		1070
701	static void	1071	inline void
702	wlist_add (WL *head, WL elem)	1072	wlist_add (WL *head, WL elem)
703	{	1073	{
704	elem->next = *head;	1074	elem->next = *head;
705	*head = elem;	1075	*head = elem;
706	}	1076	}
707		1077
708	static void	1078	inline void
709	wlist_del (WL *head, WL elem)	1079	wlist_del (WL *head, WL elem)
710	{	1080	{
711	while (*head)	1081	while (*head)
712	{	1082	{
713	if (*head == elem)	1083	if (*head == elem)
…		…
718		1088
719	head = &(*head)->next;	1089	head = &(*head)->next;
720	}	1090	}
721	}	1091	}
722		1092
723	static void	1093	inline void
724	ev_clear (W w)	1094	ev_clear_pending (EV_P_ W w)
725	{	1095	{
726	if (w->pending)	1096	if (w->pending)
727	{	1097	{
728	pendings [w->pending - 1].w = 0;	1098	pendings [ABSPRI (w)][w->pending - 1].w = 0;
729	w->pending = 0;	1099	w->pending = 0;
730	}	1100	}
731	}	1101	}
732		1102
733	static void	1103	inline void
734	ev_start (W w, int active)	1104	ev_start (EV_P_ W w, int active)
735	{	1105	{
		1106	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1107	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1108
736	w->active = active;	1109	w->active = active;
		1110	ev_ref (EV_A);
737	}	1111	}
738		1112
739	static void	1113	inline void
740	ev_stop (W w)	1114	ev_stop (EV_P_ W w)
741	{	1115	{
		1116	ev_unref (EV_A);
742	w->active = 0;	1117	w->active = 0;
743	}	1118	}
744		1119
745	/*****************************************************************************/	1120	/*****************************************************************************/
746		1121
747	void	1122	void
748	ev_io_start (struct ev_io *w)	1123	ev_io_start (EV_P_ struct ev_io *w)
749	{	1124	{
		1125	int fd = w->fd;
		1126
750	if (ev_is_active (w))	1127	if (ev_is_active (w))
751	return;	1128	return;
752		1129
753	int fd = w->fd;	1130	assert (("ev_io_start called with negative fd", fd >= 0));
754		1131
755	ev_start ((W)w, 1);	1132	ev_start (EV_A_ (W)w, 1);
756	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1133	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
757	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1134	wlist_add ((WL *)&anfds[fd].head, (WL)w);
758		1135
759	fd_change (fd);	1136	fd_change (EV_A_ fd);
760	}	1137	}
761		1138
762	void	1139	void
763	ev_io_stop (struct ev_io *w)	1140	ev_io_stop (EV_P_ struct ev_io *w)
764	{	1141	{
765	ev_clear ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
766	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
767	return;	1144	return;
768		1145
769	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1146	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
770	ev_stop ((W)w);	1147	ev_stop (EV_A_ (W)w);
771		1148
772	fd_change (w->fd);	1149	fd_change (EV_A_ w->fd);
773	}	1150	}
774		1151
775	void	1152	void
776	ev_timer_start (struct ev_timer *w)	1153	ev_timer_start (EV_P_ struct ev_timer *w)
777	{	1154	{
778	if (ev_is_active (w))	1155	if (ev_is_active (w))
779	return;	1156	return;
780		1157
781	w->at += now;	1158	((WT)w)->at += mn_now;
782		1159
783	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.));
784		1161
785	ev_start ((W)w, ++timercnt);	1162	ev_start (EV_A_ (W)w, ++timercnt);
786	array_needsize (timers, timermax, timercnt, );	1163	array_needsize (timers, timermax, timercnt, );
787	timers [timercnt - 1] = w;	1164	timers [timercnt - 1] = w;
788	upheap ((WT *)timers, timercnt - 1);	1165	upheap ((WT *)timers, timercnt - 1);
789	}
790		1166
		1167	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1168	}
		1169
791	void	1170	void
792	ev_timer_stop (struct ev_timer *w)	1171	ev_timer_stop (EV_P_ struct ev_timer *w)
793	{	1172	{
794	ev_clear ((W)w);	1173	ev_clear_pending (EV_A_ (W)w);
795	if (!ev_is_active (w))	1174	if (!ev_is_active (w))
796	return;	1175	return;
797		1176
		1177	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1178
798	if (w->active < timercnt--)	1179	if (((W)w)->active < timercnt--)
799	{	1180	{
800	timers [w->active - 1] = timers [timercnt];	1181	timers [((W)w)->active - 1] = timers [timercnt];
801	downheap ((WT *)timers, timercnt, w->active - 1);	1182	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
802	}	1183	}
803		1184
804	w->at = w->repeat;	1185	((WT)w)->at = w->repeat;
805		1186
806	ev_stop ((W)w);	1187	ev_stop (EV_A_ (W)w);
807	}	1188	}
808		1189
809	void	1190	void
810	ev_timer_again (struct ev_timer *w)	1191	ev_timer_again (EV_P_ struct ev_timer *w)
811	{	1192	{
812	if (ev_is_active (w))	1193	if (ev_is_active (w))
813	{	1194	{
814	if (w->repeat)	1195	if (w->repeat)
815	{	1196	{
816	w->at = now + w->repeat;	1197	((WT)w)->at = mn_now + w->repeat;
817	downheap ((WT *)timers, timercnt, w->active - 1);	1198	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
818	}	1199	}
819	else	1200	else
820	ev_timer_stop (w);	1201	ev_timer_stop (EV_A_ w);
821	}	1202	}
822	else if (w->repeat)	1203	else if (w->repeat)
823	ev_timer_start (w);	1204	ev_timer_start (EV_A_ w);
824	}	1205	}
825		1206
826	void	1207	void
827	ev_periodic_start (struct ev_periodic *w)	1208	ev_periodic_start (EV_P_ struct ev_periodic *w)
828	{	1209	{
829	if (ev_is_active (w))	1210	if (ev_is_active (w))
830	return;	1211	return;
831		1212
832	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.));
833		1214
834	/* 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 */
835	if (w->interval)	1216	if (w->interval)
836	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;
837		1218
838	ev_start ((W)w, ++periodiccnt);	1219	ev_start (EV_A_ (W)w, ++periodiccnt);
839	array_needsize (periodics, periodicmax, periodiccnt, );	1220	array_needsize (periodics, periodicmax, periodiccnt, );
840	periodics [periodiccnt - 1] = w;	1221	periodics [periodiccnt - 1] = w;
841	upheap ((WT *)periodics, periodiccnt - 1);	1222	upheap ((WT *)periodics, periodiccnt - 1);
842	}
843		1223
		1224	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1225	}
		1226
844	void	1227	void
845	ev_periodic_stop (struct ev_periodic *w)	1228	ev_periodic_stop (EV_P_ struct ev_periodic *w)
846	{	1229	{
847	ev_clear ((W)w);	1230	ev_clear_pending (EV_A_ (W)w);
848	if (!ev_is_active (w))	1231	if (!ev_is_active (w))
849	return;	1232	return;
850		1233
		1234	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1235
851	if (w->active < periodiccnt--)	1236	if (((W)w)->active < periodiccnt--)
852	{	1237	{
853	periodics [w->active - 1] = periodics [periodiccnt];	1238	periodics [((W)w)->active - 1] = periodics [periodiccnt];
854	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1239	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
855	}	1240	}
856		1241
857	ev_stop ((W)w);	1242	ev_stop (EV_A_ (W)w);
858	}	1243	}
859		1244
860	void	1245	void
861	ev_signal_start (struct ev_signal *w)	1246	ev_idle_start (EV_P_ struct ev_idle *w)
862	{	1247	{
863	if (ev_is_active (w))	1248	if (ev_is_active (w))
864	return;	1249	return;
865		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
866	ev_start ((W)w, 1);	1326	ev_start (EV_A_ (W)w, 1);
867	array_needsize (signals, signalmax, w->signum, signals_init);	1327	array_needsize (signals, signalmax, w->signum, signals_init);
868	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1328	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
869		1329
870	if (!w->next)	1330	if (!((WL)w)->next)
871	{	1331	{
		1332	#if WIN32
		1333	signal (w->signum, sighandler);
		1334	#else
872	struct sigaction sa;	1335	struct sigaction sa;
873	sa.sa_handler = sighandler;	1336	sa.sa_handler = sighandler;
874	sigfillset (&sa.sa_mask);	1337	sigfillset (&sa.sa_mask);
875	sa.sa_flags = 0;	1338	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
876	sigaction (w->signum, &sa, 0);	1339	sigaction (w->signum, &sa, 0);
		1340	#endif
877	}	1341	}
878	}	1342	}
879		1343
880	void	1344	void
881	ev_signal_stop (struct ev_signal *w)	1345	ev_signal_stop (EV_P_ struct ev_signal *w)
882	{	1346	{
883	ev_clear ((W)w);	1347	ev_clear_pending (EV_A_ (W)w);
884	if (!ev_is_active (w))	1348	if (!ev_is_active (w))
885	return;	1349	return;
886		1350
887	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1351	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
888	ev_stop ((W)w);	1352	ev_stop (EV_A_ (W)w);
889		1353
890	if (!signals [w->signum - 1].head)	1354	if (!signals [w->signum - 1].head)
891	signal (w->signum, SIG_DFL);	1355	signal (w->signum, SIG_DFL);
892	}	1356	}
893		1357
894	void	1358	void
895	ev_idle_start (struct ev_idle *w)	1359	ev_child_start (EV_P_ struct ev_child *w)
896	{	1360	{
		1361	#if EV_MULTIPLICITY
		1362	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1363	#endif
897	if (ev_is_active (w))	1364	if (ev_is_active (w))
898	return;	1365	return;
899		1366
900	ev_start ((W)w, ++idlecnt);	1367	ev_start (EV_A_ (W)w, 1);
901	array_needsize (idles, idlemax, idlecnt, );	1368	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
902	idles [idlecnt - 1] = w;
903	}	1369	}
904		1370
905	void	1371	void
906	ev_idle_stop (struct ev_idle *w)	1372	ev_child_stop (EV_P_ struct ev_child *w)
907	{	1373	{
908	ev_clear ((W)w);	1374	ev_clear_pending (EV_A_ (W)w);
909	if (ev_is_active (w))	1375	if (ev_is_active (w))
910	return;	1376	return;
911		1377
912	idles [w->active - 1] = idles [--idlecnt];
913	ev_stop ((W)w);
914	}
915
916	void
917	ev_prepare_start (struct ev_prepare *w)
918	{
919	if (ev_is_active (w))
920	return;
921
922	ev_start ((W)w, ++preparecnt);
923	array_needsize (prepares, preparemax, preparecnt, );
924	prepares [preparecnt - 1] = w;
925	}
926
927	void
928	ev_prepare_stop (struct ev_prepare *w)
929	{
930	ev_clear ((W)w);
931	if (ev_is_active (w))
932	return;
933
934	prepares [w->active - 1] = prepares [--preparecnt];
935	ev_stop ((W)w);
936	}
937
938	void
939	ev_check_start (struct ev_check *w)
940	{
941	if (ev_is_active (w))
942	return;
943
944	ev_start ((W)w, ++checkcnt);
945	array_needsize (checks, checkmax, checkcnt, );
946	checks [checkcnt - 1] = w;
947	}
948
949	void
950	ev_check_stop (struct ev_check *w)
951	{
952	ev_clear ((W)w);
953	if (ev_is_active (w))
954	return;
955
956	checks [w->active - 1] = checks [--checkcnt];
957	ev_stop ((W)w);
958	}
959
960	void
961	ev_child_start (struct ev_child *w)
962	{
963	if (ev_is_active (w))
964	return;
965
966	ev_start ((W)w, 1);
967	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
968	}
969
970	void
971	ev_child_stop (struct ev_child *w)
972	{
973	ev_clear ((W)w);
974	if (ev_is_active (w))
975	return;
976
977	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1378	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
978	ev_stop ((W)w);	1379	ev_stop (EV_A_ (W)w);
979	}	1380	}
980		1381
981	/*****************************************************************************/	1382	/*****************************************************************************/
982		1383
983	struct ev_once	1384	struct ev_once
…		…
987	void (*cb)(int revents, void *arg);	1388	void (*cb)(int revents, void *arg);
988	void *arg;	1389	void *arg;
989	};	1390	};
990		1391
991	static void	1392	static void
992	once_cb (struct ev_once *once, int revents)	1393	once_cb (EV_P_ struct ev_once *once, int revents)
993	{	1394	{
994	void (*cb)(int revents, void *arg) = once->cb;	1395	void (*cb)(int revents, void *arg) = once->cb;
995	void *arg = once->arg;	1396	void *arg = once->arg;
996		1397
997	ev_io_stop (&once->io);	1398	ev_io_stop (EV_A_ &once->io);
998	ev_timer_stop (&once->to);	1399	ev_timer_stop (EV_A_ &once->to);
999	free (once);	1400	free (once);
1000		1401
1001	cb (revents, arg);	1402	cb (revents, arg);
1002	}	1403	}
1003		1404
1004	static void	1405	static void
1005	once_cb_io (struct ev_io *w, int revents)	1406	once_cb_io (EV_P_ struct ev_io *w, int revents)
1006	{	1407	{
1007	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);
1008	}	1409	}
1009		1410
1010	static void	1411	static void
1011	once_cb_to (struct ev_timer *w, int revents)	1412	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1012	{	1413	{
1013	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);
1014	}	1415	}
1015		1416
1016	void	1417	void
1017	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)
1018	{	1419	{
1019	struct ev_once *once = malloc (sizeof (struct ev_once));	1420	struct ev_once *once = malloc (sizeof (struct ev_once));
1020		1421
1021	if (!once)	1422	if (!once)
1022	cb (EV_ERROR, arg);	1423	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1023	else	1424	else
1024	{	1425	{
1025	once->cb = cb;	1426	once->cb = cb;
1026	once->arg = arg;	1427	once->arg = arg;
1027		1428
1028	ev_watcher_init (&once->io, once_cb_io);	1429	ev_watcher_init (&once->io, once_cb_io);
1029
1030	if (fd >= 0)	1430	if (fd >= 0)
1031	{	1431	{
1032	ev_io_set (&once->io, fd, events);	1432	ev_io_set (&once->io, fd, events);
1033	ev_io_start (&once->io);	1433	ev_io_start (EV_A_ &once->io);
1034	}	1434	}
1035		1435
1036	ev_watcher_init (&once->to, once_cb_to);	1436	ev_watcher_init (&once->to, once_cb_to);
1037
1038	if (timeout >= 0.)	1437	if (timeout >= 0.)
1039	{	1438	{
1040	ev_timer_set (&once->to, timeout, 0.);	1439	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1440	ev_timer_start (EV_A_ &once->to);
1042	}	1441	}
1043	}	1442	}
1044	}	1443	}
1045		1444
1046	/*****************************************************************************/
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif
1102
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
1128

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