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Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.67 by root, Mon Nov 5 16:42:15 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
63	#ifndef EV_USE_REALTIME	105	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	106	# define EV_USE_REALTIME 1
65	#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	/**/
66		122
67	#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) */
68	#define MAX_BLOCKTIME 59.731	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#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 */
70		127
71	#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)
72		143
73	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
76		147
77	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80		149
81	static int have_monotonic; /* runtime */	150	#if WIN32
82		151	/* note: the comment below could not be substantiated, but what would I care */
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
84	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
85	static void (*method_poll)(ev_tstamp timeout);	154	#endif
86		155
87	/*****************************************************************************/	156	/*****************************************************************************/
88		157
89	ev_tstamp	158	typedef struct
		159	{
		160	struct ev_watcher_list *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
90	ev_time (void)	192	ev_time (void)
91	{	193	{
92	#if EV_USE_REALTIME	194	#if EV_USE_REALTIME
93	struct timespec ts;	195	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	196	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	200	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	201	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	202	#endif
101	}	203	}
102		204
103	static ev_tstamp	205	inline ev_tstamp
104	get_clock (void)	206	get_clock (void)
105	{	207	{
106	#if EV_USE_MONOTONIC	208	#if EV_USE_MONOTONIC
107	if (have_monotonic)	209	if (expect_true (have_monotonic))
108	{	210	{
109	struct timespec ts;	211	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	212	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	213	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	214	}
113	#endif	215	#endif
114		216
115	return ev_time ();	217	return ev_time ();
116	}	218	}
117		219
		220	ev_tstamp
		221	ev_now (EV_P)
		222	{
		223	return rt_now;
		224	}
		225
118	#define array_roundsize(base,n) ((n) | 4 & ~3)	226	#define array_roundsize(base,n) ((n) | 4 & ~3)
119		227
120	#define array_needsize(base,cur,cnt,init) \	228	#define array_needsize(base,cur,cnt,init) \
121	if ((cnt) > cur) \	229	if (expect_false ((cnt) > cur)) \
122	{ \	230	{ \
123	int newcnt = cur; \	231	int newcnt = cur; \
124	do \	232	do \
125	{ \	233	{ \
126	newcnt = array_roundsize (base, newcnt << 1); \	234	newcnt = array_roundsize (base, newcnt << 1); \
…		…
130	base = realloc (base, sizeof (*base) * (newcnt)); \	238	base = realloc (base, sizeof (*base) * (newcnt)); \
131	init (base + cur, newcnt - cur); \	239	init (base + cur, newcnt - cur); \
132	cur = newcnt; \	240	cur = newcnt; \
133	}	241	}
134		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
135	/*****************************************************************************/	254	/*****************************************************************************/
136
137	typedef struct
138	{
139	struct ev_io *head;
140	int events;
141	} ANFD;
142
143	static ANFD *anfds;
144	static int anfdmax;
145		255
146	static void	256	static void
147	anfds_init (ANFD *base, int count)	257	anfds_init (ANFD *base, int count)
148	{	258	{
149	while (count--)	259	while (count--)
150	{	260	{
151	base->head = 0;	261	base->head = 0;
152	base->events = EV_NONE;	262	base->events = EV_NONE;
		263	base->reify = 0;
		264
153	++base;	265	++base;
154	}	266	}
155	}	267	}
156		268
157	typedef struct
158	{
159	W w;
160	int events;
161	} ANPENDING;
162
163	static ANPENDING *pendings;
164	static int pendingmax, pendingcnt;
165
166	static void	269	static void
167	event (W w, int events)	270	event (EV_P_ W w, int events)
168	{	271	{
		272	if (w->pending)
		273	{
		274	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		275	return;
		276	}
		277
169	w->pending = ++pendingcnt;	278	w->pending = ++pendingcnt [ABSPRI (w)];
170	array_needsize (pendings, pendingmax, pendingcnt, );	279	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
171	pendings [pendingcnt - 1].w = w;	280	pendings [ABSPRI (w)][w->pending - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	281	pendings [ABSPRI (w)][w->pending - 1].events = events;
173	}	282	}
174		283
175	static void	284	static void
176	queue_events (W *events, int eventcnt, int type)	285	queue_events (EV_P_ W *events, int eventcnt, int type)
177	{	286	{
178	int i;	287	int i;
179		288
180	for (i = 0; i < eventcnt; ++i)	289	for (i = 0; i < eventcnt; ++i)
181	event (events [i], type);	290	event (EV_A_ events [i], type);
182	}	291	}
183		292
184	static void	293	static void
185	fd_event (int fd, int events)	294	fd_event (EV_P_ int fd, int events)
186	{	295	{
187	ANFD *anfd = anfds + fd;	296	ANFD *anfd = anfds + fd;
188	struct ev_io *w;	297	struct ev_io *w;
189		298
190	for (w = anfd->head; w; w = w->next)	299	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
191	{	300	{
192	int ev = w->events & events;	301	int ev = w->events & events;
193		302
194	if (ev)	303	if (ev)
195	event ((W)w, ev);	304	event (EV_A_ (W)w, ev);
196	}	305	}
197	}	306	}
198		307
199	/*****************************************************************************/	308	/*****************************************************************************/
200		309
201	static int *fdchanges;
202	static int fdchangemax, fdchangecnt;
203
204	static void	310	static void
205	fd_reify (void)	311	fd_reify (EV_P)
206	{	312	{
207	int i;	313	int i;
208		314
209	for (i = 0; i < fdchangecnt; ++i)	315	for (i = 0; i < fdchangecnt; ++i)
210	{	316	{
…		…
212	ANFD *anfd = anfds + fd;	318	ANFD *anfd = anfds + fd;
213	struct ev_io *w;	319	struct ev_io *w;
214		320
215	int events = 0;	321	int events = 0;
216		322
217	for (w = anfd->head; w; w = w->next)	323	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
218	events |= w->events;	324	events |= w->events;
219		325
220	anfd->events &= ~EV_REIFY;	326	anfd->reify = 0;
221		327
222	if (anfd->events != events)
223	{
224	method_modify (fd, anfd->events, events);	328	method_modify (EV_A_ fd, anfd->events, events);
225	anfd->events = events;	329	anfd->events = events;
226	}
227	}	330	}
228		331
229	fdchangecnt = 0;	332	fdchangecnt = 0;
230	}	333	}
231		334
232	static void	335	static void
233	fd_change (int fd)	336	fd_change (EV_P_ int fd)
234	{	337	{
235	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	338	if (anfds [fd].reify || fdchangecnt < 0)
236	return;	339	return;
237		340
238	anfds [fd].events |= EV_REIFY;	341	anfds [fd].reify = 1;
239		342
240	++fdchangecnt;	343	++fdchangecnt;
241	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	344	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
242	fdchanges [fdchangecnt - 1] = fd;	345	fdchanges [fdchangecnt - 1] = fd;
243	}	346	}
244		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
245	/* called on EBADF to verify fds */	360	/* called on EBADF to verify fds */
246	static void	361	static void
247	fd_recheck (void)	362	fd_ebadf (EV_P)
248	{	363	{
249	int fd;	364	int fd;
250		365
251	for (fd = 0; fd < anfdmax; ++fd)	366	for (fd = 0; fd < anfdmax; ++fd)
252	if (anfds [fd].events)	367	if (anfds [fd].events)
253	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	368	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
254	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)
255	{	380	{
256	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	381	close (fd);
257	ev_io_stop (anfds [fd].head);	382	fd_kill (EV_A_ fd);
		383	return;
258	}	384	}
		385	}
		386
		387	/* susually called after fork if method needs to re-arm all fds from scratch */
		388	static void
		389	fd_rearm_all (EV_P)
		390	{
		391	int fd;
		392
		393	/* this should be highly optimised to not do anything but set a flag */
		394	for (fd = 0; fd < anfdmax; ++fd)
		395	if (anfds [fd].events)
		396	{
		397	anfds [fd].events = 0;
		398	fd_change (EV_A_ fd);
		399	}
259	}	400	}
260		401
261	/*****************************************************************************/	402	/*****************************************************************************/
262		403
263	static struct ev_timer **timers;
264	static int timermax, timercnt;
265
266	static struct ev_periodic **periodics;
267	static int periodicmax, periodiccnt;
268
269	static void	404	static void
270	upheap (WT *timers, int k)	405	upheap (WT *heap, int k)
271	{	406	{
272	WT w = timers [k];	407	WT w = heap [k];
273		408
274	while (k && timers [k >> 1]->at > w->at)	409	while (k && heap [k >> 1]->at > w->at)
275	{	410	{
276	timers [k] = timers [k >> 1];	411	heap [k] = heap [k >> 1];
277	timers [k]->active = k + 1;	412	((W)heap [k])->active = k + 1;
278	k >>= 1;	413	k >>= 1;
279	}	414	}
280		415
281	timers [k] = w;	416	heap [k] = w;
282	timers [k]->active = k + 1;	417	((W)heap [k])->active = k + 1;
283		418
284	}	419	}
285		420
286	static void	421	static void
287	downheap (WT *timers, int N, int k)	422	downheap (WT *heap, int N, int k)
288	{	423	{
289	WT w = timers [k];	424	WT w = heap [k];
290		425
291	while (k < (N >> 1))	426	while (k < (N >> 1))
292	{	427	{
293	int j = k << 1;	428	int j = k << 1;
294		429
295	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	430	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296	++j;	431	++j;
297		432
298	if (w->at <= timers [j]->at)	433	if (w->at <= heap [j]->at)
299	break;	434	break;
300		435
301	timers [k] = timers [j];	436	heap [k] = heap [j];
302	timers [k]->active = k + 1;	437	((W)heap [k])->active = k + 1;
303	k = j;	438	k = j;
304	}	439	}
305		440
306	timers [k] = w;	441	heap [k] = w;
307	timers [k]->active = k + 1;	442	((W)heap [k])->active = k + 1;
308	}	443	}
309		444
310	/*****************************************************************************/	445	/*****************************************************************************/
311		446
312	typedef struct	447	typedef struct
313	{	448	{
314	struct ev_signal *head;	449	struct ev_watcher_list *head;
315	sig_atomic_t gotsig;	450	sig_atomic_t volatile gotsig;
316	} ANSIG;	451	} ANSIG;
317		452
318	static ANSIG *signals;	453	static ANSIG *signals;
319	static int signalmax;	454	static int signalmax;
320		455
321	static int sigpipe [2];	456	static int sigpipe [2];
322	static sig_atomic_t gotsig;	457	static sig_atomic_t volatile gotsig;
323	static struct ev_io sigev;	458	static struct ev_io sigev;
324		459
325	static void	460	static void
326	signals_init (ANSIG *base, int count)	461	signals_init (ANSIG *base, int count)
327	{	462	{
328	while (count--)	463	while (count--)
329	{	464	{
330	base->head = 0;	465	base->head = 0;
331	base->gotsig = 0;	466	base->gotsig = 0;
		467
332	++base;	468	++base;
333	}	469	}
334	}	470	}
335		471
336	static void	472	static void
337	sighandler (int signum)	473	sighandler (int signum)
338	{	474	{
		475	#if WIN32
		476	signal (signum, sighandler);
		477	#endif
		478
339	signals [signum - 1].gotsig = 1;	479	signals [signum - 1].gotsig = 1;
340		480
341	if (!gotsig)	481	if (!gotsig)
342	{	482	{
		483	int old_errno = errno;
343	gotsig = 1;	484	gotsig = 1;
344	write (sigpipe [1], &gotsig, 1);	485	write (sigpipe [1], &signum, 1);
		486	errno = old_errno;
345	}	487	}
346	}	488	}
347		489
348	static void	490	static void
349	sigcb (struct ev_io *iow, int revents)	491	sigcb (EV_P_ struct ev_io *iow, int revents)
350	{	492	{
351	struct ev_signal *w;	493	struct ev_watcher_list *w;
352	int sig;	494	int signum;
353		495
		496	read (sigpipe [0], &revents, 1);
354	gotsig = 0;	497	gotsig = 0;
355	read (sigpipe [0], &revents, 1);
356		498
357	for (sig = signalmax; sig--; )	499	for (signum = signalmax; signum--; )
358	if (signals [sig].gotsig)	500	if (signals [signum].gotsig)
359	{	501	{
360	signals [sig].gotsig = 0;	502	signals [signum].gotsig = 0;
361		503
362	for (w = signals [sig].head; w; w = w->next)	504	for (w = signals [signum].head; w; w = w->next)
363	event ((W)w, EV_SIGNAL);	505	event (EV_A_ (W)w, EV_SIGNAL);
364	}	506	}
365	}	507	}
366		508
367	static void	509	static void
368	siginit (void)	510	siginit (EV_P)
369	{	511	{
		512	#ifndef WIN32
370	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	513	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
371	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	514	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372		515
373	/* rather than sort out wether we really need nb, set it */	516	/* rather than sort out wether we really need nb, set it */
374	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	517	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
375	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	518	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		519	#endif
376		520
377	ev_io_set (&sigev, sigpipe [0], EV_READ);	521	ev_io_set (&sigev, sigpipe [0], EV_READ);
378	ev_io_start (&sigev);	522	ev_io_start (EV_A_ &sigev);
		523	ev_unref (EV_A); /* child watcher should not keep loop alive */
379	}	524	}
380		525
381	/*****************************************************************************/	526	/*****************************************************************************/
382		527
383	static struct ev_idle **idles;	528	#ifndef WIN32
384	static int idlemax, idlecnt;
385
386	static struct ev_prepare **prepares;
387	static int preparemax, preparecnt;
388
389	static struct ev_check **checks;
390	static int checkmax, checkcnt;
391
392	/*****************************************************************************/
393		529
394	static struct ev_child *childs [PID_HASHSIZE];	530	static struct ev_child *childs [PID_HASHSIZE];
395	static struct ev_signal childev;	531	static struct ev_signal childev;
396		532
397	#ifndef WCONTINUED	533	#ifndef WCONTINUED
398	# define WCONTINUED 0	534	# define WCONTINUED 0
399	#endif	535	#endif
400		536
401	static void	537	static void
402	childcb (struct ev_signal *sw, int revents)	538	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403	{	539	{
404	struct ev_child *w;	540	struct ev_child *w;
		541
		542	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		543	if (w->pid == pid || !w->pid)
		544	{
		545	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		546	w->rpid = pid;
		547	w->rstatus = status;
		548	event (EV_A_ (W)w, EV_CHILD);
		549	}
		550	}
		551
		552	static void
		553	childcb (EV_P_ struct ev_signal *sw, int revents)
		554	{
405	int pid, status;	555	int pid, status;
406		556
407	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	557	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
408	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	558	{
409	if (w->pid == pid || w->pid == -1)	559	/* make sure we are called again until all childs have been reaped */
410	{	560	event (EV_A_ (W)sw, EV_SIGNAL);
411	w->status = status;	561
412	event ((W)w, EV_CHILD);	562	child_reap (EV_A_ sw, pid, pid, status);
413	}	563	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		564	}
414	}	565	}
		566
		567	#endif
415		568
416	/*****************************************************************************/	569	/*****************************************************************************/
417		570
		571	#if EV_USE_KQUEUE
		572	# include "ev_kqueue.c"
		573	#endif
418	#if EV_USE_EPOLL	574	#if EV_USE_EPOLL
419	# include "ev_epoll.c"	575	# include "ev_epoll.c"
420	#endif	576	#endif
		577	#if EV_USE_POLL
		578	# include "ev_poll.c"
		579	#endif
421	#if EV_USE_SELECT	580	#if EV_USE_SELECT
422	# include "ev_select.c"	581	# include "ev_select.c"
423	#endif	582	#endif
424		583
425	int	584	int
…		…
432	ev_version_minor (void)	591	ev_version_minor (void)
433	{	592	{
434	return EV_VERSION_MINOR;	593	return EV_VERSION_MINOR;
435	}	594	}
436		595
437	int ev_init (int flags)	596	/* return true if we are running with elevated privileges and should ignore env variables */
		597	static int
		598	enable_secure (void)
438	{	599	{
		600	#ifdef WIN32
		601	return 0;
		602	#else
		603	return getuid () != geteuid ()
		604	|| getgid () != getegid ();
		605	#endif
		606	}
		607
		608	int
		609	ev_method (EV_P)
		610	{
		611	return method;
		612	}
		613
		614	static void
		615	loop_init (EV_P_ int methods)
		616	{
439	if (!ev_method)	617	if (!method)
440	{	618	{
441	#if EV_USE_MONOTONIC	619	#if EV_USE_MONOTONIC
442	{	620	{
443	struct timespec ts;	621	struct timespec ts;
444	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	622	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445	have_monotonic = 1;	623	have_monotonic = 1;
446	}	624	}
447	#endif	625	#endif
448		626
449	ev_now = ev_time ();	627	rt_now = ev_time ();
450	now = get_clock ();	628	mn_now = get_clock ();
		629	now_floor = mn_now;
451	diff = ev_now - now;	630	rtmn_diff = rt_now - mn_now;
452		631
453	if (pipe (sigpipe))	632	if (methods == EVMETHOD_AUTO)
454	return 0;	633	if (!enable_secure () && getenv ("LIBEV_METHODS"))
455		634	methods = atoi (getenv ("LIBEV_METHODS"));
		635	else
456	ev_method = EVMETHOD_NONE;	636	methods = EVMETHOD_ANY;
		637
		638	method = 0;
		639	#if EV_USE_WIN32
		640	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		644	#endif
457	#if EV_USE_EPOLL	645	#if EV_USE_EPOLL
458	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	646	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		647	#endif
		648	#if EV_USE_POLL
		649	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
459	#endif	650	#endif
460	#if EV_USE_SELECT	651	#if EV_USE_SELECT
461	if (ev_method == EVMETHOD_NONE) select_init (flags);	652	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
462	#endif	653	#endif
		654	}
		655	}
463		656
		657	void
		658	loop_destroy (EV_P)
		659	{
		660	int i;
		661
		662	#if EV_USE_WIN32
		663	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		664	#endif
		665	#if EV_USE_KQUEUE
		666	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		667	#endif
		668	#if EV_USE_EPOLL
		669	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		670	#endif
		671	#if EV_USE_POLL
		672	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		673	#endif
		674	#if EV_USE_SELECT
		675	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		676	#endif
		677
		678	for (i = NUMPRI; i--; )
		679	array_free (pending, [i]);
		680
		681	array_free (fdchange, );
		682	array_free (timer, );
		683	array_free (periodic, );
		684	array_free (idle, );
		685	array_free (prepare, );
		686	array_free (check, );
		687
		688	method = 0;
		689	/*TODO*/
		690	}
		691
		692	void
		693	loop_fork (EV_P)
		694	{
		695	/*TODO*/
		696	#if EV_USE_EPOLL
		697	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		698	#endif
		699	#if EV_USE_KQUEUE
		700	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		701	#endif
		702	}
		703
		704	#if EV_MULTIPLICITY
		705	struct ev_loop *
		706	ev_loop_new (int methods)
		707	{
		708	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		709
		710	loop_init (EV_A_ methods);
		711
		712	if (ev_method (EV_A))
		713	return loop;
		714
		715	return 0;
		716	}
		717
		718	void
		719	ev_loop_destroy (EV_P)
		720	{
		721	loop_destroy (EV_A);
		722	free (loop);
		723	}
		724
		725	void
		726	ev_loop_fork (EV_P)
		727	{
		728	loop_fork (EV_A);
		729	}
		730
		731	#endif
		732
		733	#if EV_MULTIPLICITY
		734	struct ev_loop default_loop_struct;
		735	static struct ev_loop *default_loop;
		736
		737	struct ev_loop *
		738	#else
		739	static int default_loop;
		740
		741	int
		742	#endif
		743	ev_default_loop (int methods)
		744	{
		745	if (sigpipe [0] == sigpipe [1])
		746	if (pipe (sigpipe))
		747	return 0;
		748
		749	if (!default_loop)
		750	{
		751	#if EV_MULTIPLICITY
		752	struct ev_loop *loop = default_loop = &default_loop_struct;
		753	#else
		754	default_loop = 1;
		755	#endif
		756
		757	loop_init (EV_A_ methods);
		758
464	if (ev_method)	759	if (ev_method (EV_A))
465	{	760	{
466	ev_watcher_init (&sigev, sigcb);	761	ev_watcher_init (&sigev, sigcb);
		762	ev_set_priority (&sigev, EV_MAXPRI);
467	siginit ();	763	siginit (EV_A);
468		764
		765	#ifndef WIN32
469	ev_signal_init (&childev, childcb, SIGCHLD);	766	ev_signal_init (&childev, childcb, SIGCHLD);
		767	ev_set_priority (&childev, EV_MAXPRI);
470	ev_signal_start (&childev);	768	ev_signal_start (EV_A_ &childev);
		769	ev_unref (EV_A); /* child watcher should not keep loop alive */
		770	#endif
471	}	771	}
		772	else
		773	default_loop = 0;
472	}	774	}
473		775
474	return ev_method;	776	return default_loop;
475	}	777	}
476		778
477	/*****************************************************************************/
478
479	void	779	void
480	ev_prefork (void)	780	ev_default_destroy (void)
481	{	781	{
482	/* nop */	782	#if EV_MULTIPLICITY
483	}	783	struct ev_loop *loop = default_loop;
484
485	void
486	ev_postfork_parent (void)
487	{
488	/* nop */
489	}
490
491	void
492	ev_postfork_child (void)
493	{
494	#if EV_USE_EPOLL
495	if (ev_method == EVMETHOD_EPOLL)
496	epoll_postfork_child ();
497	#endif	784	#endif
498		785
		786	ev_ref (EV_A); /* child watcher */
		787	ev_signal_stop (EV_A_ &childev);
		788
		789	ev_ref (EV_A); /* signal watcher */
499	ev_io_stop (&sigev);	790	ev_io_stop (EV_A_ &sigev);
		791
		792	close (sigpipe [0]); sigpipe [0] = 0;
		793	close (sigpipe [1]); sigpipe [1] = 0;
		794
		795	loop_destroy (EV_A);
		796	}
		797
		798	void
		799	ev_default_fork (void)
		800	{
		801	#if EV_MULTIPLICITY
		802	struct ev_loop *loop = default_loop;
		803	#endif
		804
		805	loop_fork (EV_A);
		806
		807	ev_io_stop (EV_A_ &sigev);
500	close (sigpipe [0]);	808	close (sigpipe [0]);
501	close (sigpipe [1]);	809	close (sigpipe [1]);
502	pipe (sigpipe);	810	pipe (sigpipe);
		811
		812	ev_ref (EV_A); /* signal watcher */
503	siginit ();	813	siginit (EV_A);
504	}	814	}
505		815
506	/*****************************************************************************/	816	/*****************************************************************************/
507		817
508	static void	818	static void
509	call_pending (void)	819	call_pending (EV_P)
510	{	820	{
		821	int pri;
		822
		823	for (pri = NUMPRI; pri--; )
511	while (pendingcnt)	824	while (pendingcnt [pri])
512	{	825	{
513	ANPENDING *p = pendings + --pendingcnt;	826	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514		827
515	if (p->w)	828	if (p->w)
516	{	829	{
517	p->w->pending = 0;	830	p->w->pending = 0;
518	p->w->cb (p->w, p->events);	831	p->w->cb (EV_A_ p->w, p->events);
519	}	832	}
520	}	833	}
521	}	834	}
522		835
523	static void	836	static void
524	timers_reify (void)	837	timers_reify (EV_P)
525	{	838	{
526	while (timercnt && timers [0]->at <= now)	839	while (timercnt && ((WT)timers [0])->at <= mn_now)
527	{	840	{
528	struct ev_timer *w = timers [0];	841	struct ev_timer *w = timers [0];
		842
		843	assert (("inactive timer on timer heap detected", ev_is_active (w)));
529		844
530	/* first reschedule or stop timer */	845	/* first reschedule or stop timer */
531	if (w->repeat)	846	if (w->repeat)
532	{	847	{
		848	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	849	((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);	850	downheap ((WT *)timers, timercnt, 0);
536	}	851	}
537	else	852	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	853	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539		854
540	event ((W)w, EV_TIMEOUT);	855	event (EV_A_ (W)w, EV_TIMEOUT);
541	}	856	}
542	}	857	}
543		858
544	static void	859	static void
545	periodics_reify (void)	860	periodics_reify (EV_P)
546	{	861	{
547	while (periodiccnt && periodics [0]->at <= ev_now)	862	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
548	{	863	{
549	struct ev_periodic *w = periodics [0];	864	struct ev_periodic *w = periodics [0];
		865
		866	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
550		867
551	/* first reschedule or stop timer */	868	/* first reschedule or stop timer */
552	if (w->interval)	869	if (w->interval)
553	{	870	{
554	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	871	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
555	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	872	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
556	downheap ((WT *)periodics, periodiccnt, 0);	873	downheap ((WT *)periodics, periodiccnt, 0);
557	}	874	}
558	else	875	else
559	ev_periodic_stop (w); /* nonrepeating: stop timer */	876	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560		877
561	event ((W)w, EV_TIMEOUT);	878	event (EV_A_ (W)w, EV_PERIODIC);
562	}	879	}
563	}	880	}
564		881
565	static void	882	static void
566	periodics_reschedule (ev_tstamp diff)	883	periodics_reschedule (EV_P)
567	{	884	{
568	int i;	885	int i;
569		886
570	/* adjust periodics after time jump */	887	/* adjust periodics after time jump */
571	for (i = 0; i < periodiccnt; ++i)	888	for (i = 0; i < periodiccnt; ++i)
572	{	889	{
573	struct ev_periodic *w = periodics [i];	890	struct ev_periodic *w = periodics [i];
574		891
575	if (w->interval)	892	if (w->interval)
576	{	893	{
577	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	894	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
578		895
579	if (fabs (diff) >= 1e-4)	896	if (fabs (diff) >= 1e-4)
580	{	897	{
581	ev_periodic_stop (w);	898	ev_periodic_stop (EV_A_ w);
582	ev_periodic_start (w);	899	ev_periodic_start (EV_A_ w);
583		900
584	i = 0; /* restart loop, inefficient, but time jumps should be rare */	901	i = 0; /* restart loop, inefficient, but time jumps should be rare */
585	}	902	}
586	}	903	}
587	}	904	}
588	}	905	}
589		906
		907	inline int
		908	time_update_monotonic (EV_P)
		909	{
		910	mn_now = get_clock ();
		911
		912	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		913	{
		914	rt_now = rtmn_diff + mn_now;
		915	return 0;
		916	}
		917	else
		918	{
		919	now_floor = mn_now;
		920	rt_now = ev_time ();
		921	return 1;
		922	}
		923	}
		924
590	static void	925	static void
591	time_update (void)	926	time_update (EV_P)
592	{	927	{
593	int i;	928	int i;
594		929
595	ev_now = ev_time ();	930	#if EV_USE_MONOTONIC
596
597	if (have_monotonic)	931	if (expect_true (have_monotonic))
598	{	932	{
599	ev_tstamp odiff = diff;	933	if (time_update_monotonic (EV_A))
600
601	for (i = 4; --i; ) /* loop a few times, before making important decisions */
602	{	934	{
603	now = get_clock ();	935	ev_tstamp odiff = rtmn_diff;
		936
		937	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		938	{
604	diff = ev_now - now;	939	rtmn_diff = rt_now - mn_now;
605		940
606	if (fabs (odiff - diff) < MIN_TIMEJUMP)	941	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
607	return; /* all is well */	942	return; /* all is well */
608		943
609	ev_now = ev_time ();	944	rt_now = ev_time ();
		945	mn_now = get_clock ();
		946	now_floor = mn_now;
		947	}
		948
		949	periodics_reschedule (EV_A);
		950	/* no timer adjustment, as the monotonic clock doesn't jump */
		951	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
610	}	952	}
611
612	periodics_reschedule (diff - odiff);
613	/* no timer adjustment, as the monotonic clock doesn't jump */
614	}	953	}
615	else	954	else
		955	#endif
616	{	956	{
617	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	957	rt_now = ev_time ();
		958
		959	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
618	{	960	{
619	periodics_reschedule (ev_now - now);	961	periodics_reschedule (EV_A);
620		962
621	/* adjust timers. this is easy, as the offset is the same for all */	963	/* adjust timers. this is easy, as the offset is the same for all */
622	for (i = 0; i < timercnt; ++i)	964	for (i = 0; i < timercnt; ++i)
623	timers [i]->at += diff;	965	((WT)timers [i])->at += rt_now - mn_now;
624	}	966	}
625		967
626	now = ev_now;	968	mn_now = rt_now;
627	}	969	}
628	}	970	}
629		971
630	int ev_loop_done;	972	void
		973	ev_ref (EV_P)
		974	{
		975	++activecnt;
		976	}
631		977
		978	void
		979	ev_unref (EV_P)
		980	{
		981	--activecnt;
		982	}
		983
		984	static int loop_done;
		985
		986	void
632	void ev_loop (int flags)	987	ev_loop (EV_P_ int flags)
633	{	988	{
634	double block;	989	double block;
635	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	990	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
636		991
637	do	992	do
638	{	993	{
639	/* queue check watchers (and execute them) */	994	/* queue check watchers (and execute them) */
640	if (preparecnt)	995	if (expect_false (preparecnt))
641	{	996	{
642	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	997	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643	call_pending ();	998	call_pending (EV_A);
644	}	999	}
645		1000
646	/* update fd-related kernel structures */	1001	/* update fd-related kernel structures */
647	fd_reify ();	1002	fd_reify (EV_A);
648		1003
649	/* calculate blocking time */	1004	/* calculate blocking time */
650		1005
651	/* we only need this for !monotonic clockor timers, but as we basically	1006	/* we only need this for !monotonic clockor timers, but as we basically
652	always have timers, we just calculate it always */	1007	always have timers, we just calculate it always */
		1008	#if EV_USE_MONOTONIC
		1009	if (expect_true (have_monotonic))
		1010	time_update_monotonic (EV_A);
		1011	else
		1012	#endif
		1013	{
653	ev_now = ev_time ();	1014	rt_now = ev_time ();
		1015	mn_now = rt_now;
		1016	}
654		1017
655	if (flags & EVLOOP_NONBLOCK || idlecnt)	1018	if (flags & EVLOOP_NONBLOCK || idlecnt)
656	block = 0.;	1019	block = 0.;
657	else	1020	else
658	{	1021	{
659	block = MAX_BLOCKTIME;	1022	block = MAX_BLOCKTIME;
660		1023
661	if (timercnt)	1024	if (timercnt)
662	{	1025	{
663	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	1026	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
664	if (block > to) block = to;	1027	if (block > to) block = to;
665	}	1028	}
666		1029
667	if (periodiccnt)	1030	if (periodiccnt)
668	{	1031	{
669	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1032	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
670	if (block > to) block = to;	1033	if (block > to) block = to;
671	}	1034	}
672		1035
673	if (block < 0.) block = 0.;	1036	if (block < 0.) block = 0.;
674	}	1037	}
675		1038
676	method_poll (block);	1039	method_poll (EV_A_ block);
677		1040
678	/* update ev_now, do magic */	1041	/* update rt_now, do magic */
679	time_update ();	1042	time_update (EV_A);
680		1043
681	/* queue pending timers and reschedule them */	1044	/* queue pending timers and reschedule them */
682	timers_reify (); /* relative timers called last */	1045	timers_reify (EV_A); /* relative timers called last */
683	periodics_reify (); /* absolute timers called first */	1046	periodics_reify (EV_A); /* absolute timers called first */
684		1047
685	/* queue idle watchers unless io or timers are pending */	1048	/* queue idle watchers unless io or timers are pending */
686	if (!pendingcnt)	1049	if (!pendingcnt)
687	queue_events ((W *)idles, idlecnt, EV_IDLE);	1050	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688		1051
689	/* queue check watchers, to be executed first */	1052	/* queue check watchers, to be executed first */
690	if (checkcnt)	1053	if (checkcnt)
691	queue_events ((W *)checks, checkcnt, EV_CHECK);	1054	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692		1055
693	call_pending ();	1056	call_pending (EV_A);
694	}	1057	}
695	while (!ev_loop_done);	1058	while (activecnt && !loop_done);
696		1059
697	if (ev_loop_done != 2)	1060	if (loop_done != 2)
698	ev_loop_done = 0;	1061	loop_done = 0;
		1062	}
		1063
		1064	void
		1065	ev_unloop (EV_P_ int how)
		1066	{
		1067	loop_done = how;
699	}	1068	}
700		1069
701	/*****************************************************************************/	1070	/*****************************************************************************/
702		1071
703	static void	1072	inline void
704	wlist_add (WL *head, WL elem)	1073	wlist_add (WL *head, WL elem)
705	{	1074	{
706	elem->next = *head;	1075	elem->next = *head;
707	*head = elem;	1076	*head = elem;
708	}	1077	}
709		1078
710	static void	1079	inline void
711	wlist_del (WL *head, WL elem)	1080	wlist_del (WL *head, WL elem)
712	{	1081	{
713	while (*head)	1082	while (*head)
714	{	1083	{
715	if (*head == elem)	1084	if (*head == elem)
…		…
720		1089
721	head = &(*head)->next;	1090	head = &(*head)->next;
722	}	1091	}
723	}	1092	}
724		1093
725	static void	1094	inline void
726	ev_clear (W w)	1095	ev_clear_pending (EV_P_ W w)
727	{	1096	{
728	if (w->pending)	1097	if (w->pending)
729	{	1098	{
730	pendings [w->pending - 1].w = 0;	1099	pendings [ABSPRI (w)][w->pending - 1].w = 0;
731	w->pending = 0;	1100	w->pending = 0;
732	}	1101	}
733	}	1102	}
734		1103
735	static void	1104	inline void
736	ev_start (W w, int active)	1105	ev_start (EV_P_ W w, int active)
737	{	1106	{
		1107	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1108	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1109
738	w->active = active;	1110	w->active = active;
		1111	ev_ref (EV_A);
739	}	1112	}
740		1113
741	static void	1114	inline void
742	ev_stop (W w)	1115	ev_stop (EV_P_ W w)
743	{	1116	{
		1117	ev_unref (EV_A);
744	w->active = 0;	1118	w->active = 0;
745	}	1119	}
746		1120
747	/*****************************************************************************/	1121	/*****************************************************************************/
748		1122
749	void	1123	void
750	ev_io_start (struct ev_io *w)	1124	ev_io_start (EV_P_ struct ev_io *w)
751	{	1125	{
		1126	int fd = w->fd;
		1127
752	if (ev_is_active (w))	1128	if (ev_is_active (w))
753	return;	1129	return;
754		1130
755	int fd = w->fd;	1131	assert (("ev_io_start called with negative fd", fd >= 0));
756		1132
757	ev_start ((W)w, 1);	1133	ev_start (EV_A_ (W)w, 1);
758	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1134	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
759	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1135	wlist_add ((WL *)&anfds[fd].head, (WL)w);
760		1136
761	fd_change (fd);	1137	fd_change (EV_A_ fd);
762	}	1138	}
763		1139
764	void	1140	void
765	ev_io_stop (struct ev_io *w)	1141	ev_io_stop (EV_P_ struct ev_io *w)
766	{	1142	{
767	ev_clear ((W)w);	1143	ev_clear_pending (EV_A_ (W)w);
768	if (!ev_is_active (w))	1144	if (!ev_is_active (w))
769	return;	1145	return;
770		1146
771	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1147	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772	ev_stop ((W)w);	1148	ev_stop (EV_A_ (W)w);
773		1149
774	fd_change (w->fd);	1150	fd_change (EV_A_ w->fd);
775	}	1151	}
776		1152
777	void	1153	void
778	ev_timer_start (struct ev_timer *w)	1154	ev_timer_start (EV_P_ struct ev_timer *w)
779	{	1155	{
780	if (ev_is_active (w))	1156	if (ev_is_active (w))
781	return;	1157	return;
782		1158
783	w->at += now;	1159	((WT)w)->at += mn_now;
784		1160
785	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1161	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
786		1162
787	ev_start ((W)w, ++timercnt);	1163	ev_start (EV_A_ (W)w, ++timercnt);
788	array_needsize (timers, timermax, timercnt, );	1164	array_needsize (timers, timermax, timercnt, );
789	timers [timercnt - 1] = w;	1165	timers [timercnt - 1] = w;
790	upheap ((WT *)timers, timercnt - 1);	1166	upheap ((WT *)timers, timercnt - 1);
791	}
792		1167
		1168	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1169	}
		1170
793	void	1171	void
794	ev_timer_stop (struct ev_timer *w)	1172	ev_timer_stop (EV_P_ struct ev_timer *w)
795	{	1173	{
796	ev_clear ((W)w);	1174	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1175	if (!ev_is_active (w))
798	return;	1176	return;
799		1177
		1178	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1179
800	if (w->active < timercnt--)	1180	if (((W)w)->active < timercnt--)
801	{	1181	{
802	timers [w->active - 1] = timers [timercnt];	1182	timers [((W)w)->active - 1] = timers [timercnt];
803	downheap ((WT *)timers, timercnt, w->active - 1);	1183	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
804	}	1184	}
805		1185
806	w->at = w->repeat;	1186	((WT)w)->at = w->repeat;
807		1187
808	ev_stop ((W)w);	1188	ev_stop (EV_A_ (W)w);
809	}	1189	}
810		1190
811	void	1191	void
812	ev_timer_again (struct ev_timer *w)	1192	ev_timer_again (EV_P_ struct ev_timer *w)
813	{	1193	{
814	if (ev_is_active (w))	1194	if (ev_is_active (w))
815	{	1195	{
816	if (w->repeat)	1196	if (w->repeat)
817	{	1197	{
818	w->at = now + w->repeat;	1198	((WT)w)->at = mn_now + w->repeat;
819	downheap ((WT *)timers, timercnt, w->active - 1);	1199	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1200	}
821	else	1201	else
822	ev_timer_stop (w);	1202	ev_timer_stop (EV_A_ w);
823	}	1203	}
824	else if (w->repeat)	1204	else if (w->repeat)
825	ev_timer_start (w);	1205	ev_timer_start (EV_A_ w);
826	}	1206	}
827		1207
828	void	1208	void
829	ev_periodic_start (struct ev_periodic *w)	1209	ev_periodic_start (EV_P_ struct ev_periodic *w)
830	{	1210	{
831	if (ev_is_active (w))	1211	if (ev_is_active (w))
832	return;	1212	return;
833		1213
834	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1214	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
835		1215
836	/* this formula differs from the one in periodic_reify because we do not always round up */	1216	/* this formula differs from the one in periodic_reify because we do not always round up */
837	if (w->interval)	1217	if (w->interval)
838	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1218	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
839		1219
840	ev_start ((W)w, ++periodiccnt);	1220	ev_start (EV_A_ (W)w, ++periodiccnt);
841	array_needsize (periodics, periodicmax, periodiccnt, );	1221	array_needsize (periodics, periodicmax, periodiccnt, );
842	periodics [periodiccnt - 1] = w;	1222	periodics [periodiccnt - 1] = w;
843	upheap ((WT *)periodics, periodiccnt - 1);	1223	upheap ((WT *)periodics, periodiccnt - 1);
844	}
845		1224
		1225	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1226	}
		1227
846	void	1228	void
847	ev_periodic_stop (struct ev_periodic *w)	1229	ev_periodic_stop (EV_P_ struct ev_periodic *w)
848	{	1230	{
849	ev_clear ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
850	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
851	return;	1233	return;
852		1234
		1235	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1236
853	if (w->active < periodiccnt--)	1237	if (((W)w)->active < periodiccnt--)
854	{	1238	{
855	periodics [w->active - 1] = periodics [periodiccnt];	1239	periodics [((W)w)->active - 1] = periodics [periodiccnt];
856	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1240	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
857	}	1241	}
858		1242
859	ev_stop ((W)w);	1243	ev_stop (EV_A_ (W)w);
860	}	1244	}
861		1245
862	void	1246	void
863	ev_signal_start (struct ev_signal *w)	1247	ev_idle_start (EV_P_ struct ev_idle *w)
864	{	1248	{
865	if (ev_is_active (w))	1249	if (ev_is_active (w))
866	return;	1250	return;
867		1251
		1252	ev_start (EV_A_ (W)w, ++idlecnt);
		1253	array_needsize (idles, idlemax, idlecnt, );
		1254	idles [idlecnt - 1] = w;
		1255	}
		1256
		1257	void
		1258	ev_idle_stop (EV_P_ struct ev_idle *w)
		1259	{
		1260	ev_clear_pending (EV_A_ (W)w);
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	idles [((W)w)->active - 1] = idles [--idlecnt];
		1265	ev_stop (EV_A_ (W)w);
		1266	}
		1267
		1268	void
		1269	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1270	{
		1271	if (ev_is_active (w))
		1272	return;
		1273
		1274	ev_start (EV_A_ (W)w, ++preparecnt);
		1275	array_needsize (prepares, preparemax, preparecnt, );
		1276	prepares [preparecnt - 1] = w;
		1277	}
		1278
		1279	void
		1280	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1281	{
		1282	ev_clear_pending (EV_A_ (W)w);
		1283	if (ev_is_active (w))
		1284	return;
		1285
		1286	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1287	ev_stop (EV_A_ (W)w);
		1288	}
		1289
		1290	void
		1291	ev_check_start (EV_P_ struct ev_check *w)
		1292	{
		1293	if (ev_is_active (w))
		1294	return;
		1295
		1296	ev_start (EV_A_ (W)w, ++checkcnt);
		1297	array_needsize (checks, checkmax, checkcnt, );
		1298	checks [checkcnt - 1] = w;
		1299	}
		1300
		1301	void
		1302	ev_check_stop (EV_P_ struct ev_check *w)
		1303	{
		1304	ev_clear_pending (EV_A_ (W)w);
		1305	if (ev_is_active (w))
		1306	return;
		1307
		1308	checks [((W)w)->active - 1] = checks [--checkcnt];
		1309	ev_stop (EV_A_ (W)w);
		1310	}
		1311
		1312	#ifndef SA_RESTART
		1313	# define SA_RESTART 0
		1314	#endif
		1315
		1316	void
		1317	ev_signal_start (EV_P_ struct ev_signal *w)
		1318	{
		1319	#if EV_MULTIPLICITY
		1320	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1321	#endif
		1322	if (ev_is_active (w))
		1323	return;
		1324
		1325	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1326
868	ev_start ((W)w, 1);	1327	ev_start (EV_A_ (W)w, 1);
869	array_needsize (signals, signalmax, w->signum, signals_init);	1328	array_needsize (signals, signalmax, w->signum, signals_init);
870	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1329	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871		1330
872	if (!w->next)	1331	if (!((WL)w)->next)
873	{	1332	{
		1333	#if WIN32
		1334	signal (w->signum, sighandler);
		1335	#else
874	struct sigaction sa;	1336	struct sigaction sa;
875	sa.sa_handler = sighandler;	1337	sa.sa_handler = sighandler;
876	sigfillset (&sa.sa_mask);	1338	sigfillset (&sa.sa_mask);
877	sa.sa_flags = 0;	1339	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878	sigaction (w->signum, &sa, 0);	1340	sigaction (w->signum, &sa, 0);
		1341	#endif
879	}	1342	}
880	}	1343	}
881		1344
882	void	1345	void
883	ev_signal_stop (struct ev_signal *w)	1346	ev_signal_stop (EV_P_ struct ev_signal *w)
884	{	1347	{
885	ev_clear ((W)w);	1348	ev_clear_pending (EV_A_ (W)w);
886	if (!ev_is_active (w))	1349	if (!ev_is_active (w))
887	return;	1350	return;
888		1351
889	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1352	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890	ev_stop ((W)w);	1353	ev_stop (EV_A_ (W)w);
891		1354
892	if (!signals [w->signum - 1].head)	1355	if (!signals [w->signum - 1].head)
893	signal (w->signum, SIG_DFL);	1356	signal (w->signum, SIG_DFL);
894	}	1357	}
895		1358
896	void	1359	void
897	ev_idle_start (struct ev_idle *w)	1360	ev_child_start (EV_P_ struct ev_child *w)
898	{	1361	{
		1362	#if EV_MULTIPLICITY
		1363	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1364	#endif
899	if (ev_is_active (w))	1365	if (ev_is_active (w))
900	return;	1366	return;
901		1367
902	ev_start ((W)w, ++idlecnt);	1368	ev_start (EV_A_ (W)w, 1);
903	array_needsize (idles, idlemax, idlecnt, );	1369	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
904	idles [idlecnt - 1] = w;
905	}	1370	}
906		1371
907	void	1372	void
908	ev_idle_stop (struct ev_idle *w)	1373	ev_child_stop (EV_P_ struct ev_child *w)
909	{	1374	{
910	ev_clear ((W)w);	1375	ev_clear_pending (EV_A_ (W)w);
911	if (ev_is_active (w))	1376	if (ev_is_active (w))
912	return;	1377	return;
913		1378
914	idles [w->active - 1] = idles [--idlecnt];
915	ev_stop ((W)w);
916	}
917
918	void
919	ev_prepare_start (struct ev_prepare *w)
920	{
921	if (ev_is_active (w))
922	return;
923
924	ev_start ((W)w, ++preparecnt);
925	array_needsize (prepares, preparemax, preparecnt, );
926	prepares [preparecnt - 1] = w;
927	}
928
929	void
930	ev_prepare_stop (struct ev_prepare *w)
931	{
932	ev_clear ((W)w);
933	if (ev_is_active (w))
934	return;
935
936	prepares [w->active - 1] = prepares [--preparecnt];
937	ev_stop ((W)w);
938	}
939
940	void
941	ev_check_start (struct ev_check *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, ++checkcnt);
947	array_needsize (checks, checkmax, checkcnt, );
948	checks [checkcnt - 1] = w;
949	}
950
951	void
952	ev_check_stop (struct ev_check *w)
953	{
954	ev_clear ((W)w);
955	if (ev_is_active (w))
956	return;
957
958	checks [w->active - 1] = checks [--checkcnt];
959	ev_stop ((W)w);
960	}
961
962	void
963	ev_child_start (struct ev_child *w)
964	{
965	if (ev_is_active (w))
966	return;
967
968	ev_start ((W)w, 1);
969	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	}
971
972	void
973	ev_child_stop (struct ev_child *w)
974	{
975	ev_clear ((W)w);
976	if (ev_is_active (w))
977	return;
978
979	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1379	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	ev_stop ((W)w);	1380	ev_stop (EV_A_ (W)w);
981	}	1381	}
982		1382
983	/*****************************************************************************/	1383	/*****************************************************************************/
984		1384
985	struct ev_once	1385	struct ev_once
…		…
989	void (*cb)(int revents, void *arg);	1389	void (*cb)(int revents, void *arg);
990	void *arg;	1390	void *arg;
991	};	1391	};
992		1392
993	static void	1393	static void
994	once_cb (struct ev_once *once, int revents)	1394	once_cb (EV_P_ struct ev_once *once, int revents)
995	{	1395	{
996	void (*cb)(int revents, void *arg) = once->cb;	1396	void (*cb)(int revents, void *arg) = once->cb;
997	void *arg = once->arg;	1397	void *arg = once->arg;
998		1398
999	ev_io_stop (&once->io);	1399	ev_io_stop (EV_A_ &once->io);
1000	ev_timer_stop (&once->to);	1400	ev_timer_stop (EV_A_ &once->to);
1001	free (once);	1401	free (once);
1002		1402
1003	cb (revents, arg);	1403	cb (revents, arg);
1004	}	1404	}
1005		1405
1006	static void	1406	static void
1007	once_cb_io (struct ev_io *w, int revents)	1407	once_cb_io (EV_P_ struct ev_io *w, int revents)
1008	{	1408	{
1009	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1409	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1010	}	1410	}
1011		1411
1012	static void	1412	static void
1013	once_cb_to (struct ev_timer *w, int revents)	1413	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014	{	1414	{
1015	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1415	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1016	}	1416	}
1017		1417
1018	void	1418	void
1019	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1419	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1020	{	1420	{
1021	struct ev_once *once = malloc (sizeof (struct ev_once));	1421	struct ev_once *once = malloc (sizeof (struct ev_once));
1022		1422
1023	if (!once)	1423	if (!once)
1024	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1424	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1029		1429
1030	ev_watcher_init (&once->io, once_cb_io);	1430	ev_watcher_init (&once->io, once_cb_io);
1031	if (fd >= 0)	1431	if (fd >= 0)
1032	{	1432	{
1033	ev_io_set (&once->io, fd, events);	1433	ev_io_set (&once->io, fd, events);
1034	ev_io_start (&once->io);	1434	ev_io_start (EV_A_ &once->io);
1035	}	1435	}
1036		1436
1037	ev_watcher_init (&once->to, once_cb_to);	1437	ev_watcher_init (&once->to, once_cb_to);
1038	if (timeout >= 0.)	1438	if (timeout >= 0.)
1039	{	1439	{
1040	ev_timer_set (&once->to, timeout, 0.);	1440	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1441	ev_timer_start (EV_A_ &once->to);
1042	}	1442	}
1043	}	1443	}
1044	}	1444	}
1045		1445
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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