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Comparing libev/ev.c (file contents):
Revision 1.29 by root, Thu Nov 1 08:10:03 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 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
63	#ifndef EV_USE_REALTIME	97	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	98	# define EV_USE_REALTIME 1
65	#endif	99	#endif
		100
		101	/**/
		102
		103	#ifndef CLOCK_MONOTONIC
		104	# undef EV_USE_MONOTONIC
		105	# define EV_USE_MONOTONIC 0
		106	#endif
		107
		108	#ifndef CLOCK_REALTIME
		109	# undef EV_USE_REALTIME
		110	# define EV_USE_REALTIME 0
		111	#endif
		112
		113	/**/
66		114
67	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	115	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
68	#define MAX_BLOCKTIME 59.731	116	#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 */	117	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		118	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
70		119
71	#include "ev.h"	120	#include "ev.h"
		121
		122	#if __GNUC__ >= 3
		123	# define expect(expr,value) __builtin_expect ((expr),(value))
		124	# define inline inline
		125	#else
		126	# define expect(expr,value) (expr)
		127	# define inline static
		128	#endif
		129
		130	#define expect_false(expr) expect ((expr) != 0, 0)
		131	#define expect_true(expr) expect ((expr) != 0, 1)
		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
72		135
73	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
76		139
77	static ev_tstamp now, diff; /* monotonic clock */	140	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80
81	static int have_monotonic; /* runtime */
82
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		141
87	/*****************************************************************************/	142	/*****************************************************************************/
88		143
89	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
90	ev_time (void)	178	ev_time (void)
91	{	179	{
92	#if EV_USE_REALTIME	180	#if EV_USE_REALTIME
93	struct timespec ts;	181	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	188	#endif
101	}	189	}
102		190
103	static ev_tstamp	191	inline ev_tstamp
104	get_clock (void)	192	get_clock (void)
105	{	193	{
106	#if EV_USE_MONOTONIC	194	#if EV_USE_MONOTONIC
107	if (have_monotonic)	195	if (expect_true (have_monotonic))
108	{	196	{
109	struct timespec ts;	197	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	198	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	200	}
113	#endif	201	#endif
114		202
115	return ev_time ();	203	return ev_time ();
116	}	204	}
117		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
		210	}
		211
118	#define array_nextsize(n) (((n) << 1) | 4 & ~3)	212	#define array_roundsize(base,n) ((n) | 4 & ~3)
119	#define array_prevsize(n) (((n) >> 1) | 4 & ~3)
120		213
121	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
122	if ((cnt) > cur) \	215	if (expect_false ((cnt) > cur)) \
123	{ \	216	{ \
124	int newcnt = cur; \	217	int newcnt = cur; \
125	do \	218	do \
126	{ \	219	{ \
127	newcnt = array_nextsize (newcnt); \	220	newcnt = array_roundsize (base, newcnt << 1); \
128	} \	221	} \
129	while ((cnt) > newcnt); \	222	while ((cnt) > newcnt); \
130	\	223	\
131	base = realloc (base, sizeof (*base) * (newcnt)); \	224	base = realloc (base, sizeof (*base) * (newcnt)); \
132	init (base + cur, newcnt - cur); \	225	init (base + cur, newcnt - cur); \
133	cur = newcnt; \	226	cur = newcnt; \
134	}	227	}
135		228
136	/*****************************************************************************/	229	/*****************************************************************************/
137		230
138	typedef struct
139	{
140	struct ev_io *head;
141	int events;
142	} ANFD;
143
144	static ANFD *anfds;
145	static int anfdmax;
146
147	static void	231	static void
148	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
149	{	233	{
150	while (count--)	234	while (count--)
151	{	235	{
152	base->head = 0;	236	base->head = 0;
153	base->events = EV_NONE;	237	base->events = EV_NONE;
		238	base->reify = 0;
		239
154	++base;	240	++base;
155	}	241	}
156	}	242	}
157		243
158	typedef struct
159	{
160	W w;
161	int events;
162	} ANPENDING;
163
164	static ANPENDING *pendings;
165	static int pendingmax, pendingcnt;
166
167	static void	244	static void
168	event (W w, int events)	245	event (EV_P_ W w, int events)
169	{	246	{
170	if (w->active)	247	if (w->pending)
171	{	248	{
172	w->pending = ++pendingcnt;
173	array_needsize (pendings, pendingmax, pendingcnt, );
174	pendings [pendingcnt - 1].w = w;
175	pendings [pendingcnt - 1].events = events;	249	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		250	return;
176	}	251	}
177	}
178		252
		253	w->pending = ++pendingcnt [ABSPRI (w)];
		254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
		255	pendings [ABSPRI (w)][w->pending - 1].w = w;
		256	pendings [ABSPRI (w)][w->pending - 1].events = events;
		257	}
		258
179	static void	259	static void
180	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	261	{
182	int i;	262	int i;
183		263
184	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	265	event (EV_A_ events [i], type);
186	}	266	}
187		267
188	static void	268	static void
189	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
190	{	270	{
191	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	272	struct ev_io *w;
193		273
194	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
195	{	275	{
196	int ev = w->events & events;	276	int ev = w->events & events;
197		277
198	if (ev)	278	if (ev)
199	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
200	}	280	}
201	}	281	}
202		282
203	/*****************************************************************************/	283	/*****************************************************************************/
204		284
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	285	static void
209	fd_reify (void)	286	fd_reify (EV_P)
210	{	287	{
211	int i;	288	int i;
212		289
213	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
214	{	291	{
…		…
216	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	294	struct ev_io *w;
218		295
219	int events = 0;	296	int events = 0;
220		297
221	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
222	events |= w->events;	299	events |= w->events;
223		300
224	anfd->events &= ~EV_REIFY;	301	anfd->reify = 0;
225		302
226	if (anfd->events != events)	303	if (anfd->events != events)
227	{	304	{
228	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	306	anfd->events = events;
230	}	307	}
231	}	308	}
232		309
233	fdchangecnt = 0;	310	fdchangecnt = 0;
234	}	311	}
235		312
236	static void	313	static void
237	fd_change (int fd)	314	fd_change (EV_P_ int fd)
238	{	315	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	316	if (anfds [fd].reify || fdchangecnt < 0)
240	return;	317	return;
241		318
242	anfds [fd].events |= EV_REIFY;	319	anfds [fd].reify = 1;
243		320
244	++fdchangecnt;	321	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
246	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
247	}	324	}
248		325
		326	static void
		327	fd_kill (EV_P_ int fd)
		328	{
		329	struct ev_io *w;
		330
		331	while ((w = (struct ev_io *)anfds [fd].head))
		332	{
		333	ev_io_stop (EV_A_ w);
		334	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		335	}
		336	}
		337
249	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
250	static void	339	static void
251	fd_recheck (void)	340	fd_ebadf (EV_P)
252	{	341	{
253	int fd;	342	int fd;
254		343
255	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	345	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
258	while (anfds [fd].head)	347	fd_kill (EV_A_ fd);
		348	}
		349
		350	/* called on ENOMEM in select/poll to kill some fds and retry */
		351	static void
		352	fd_enomem (EV_P)
		353	{
		354	int fd = anfdmax;
		355
		356	while (fd--)
		357	if (anfds [fd].events)
259	{	358	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	359	close (fd);
261	ev_io_stop (anfds [fd].head);	360	fd_kill (EV_A_ fd);
		361	return;
262	}	362	}
		363	}
		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
263	}	378	}
264		379
265	/*****************************************************************************/	380	/*****************************************************************************/
266		381
267	static struct ev_timer **timers;
268	static int timermax, timercnt;
269
270	static struct ev_periodic **periodics;
271	static int periodicmax, periodiccnt;
272
273	static void	382	static void
274	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
275	{	384	{
276	WT w = timers [k];	385	WT w = heap [k];
277		386
278	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
279	{	388	{
280	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
282	k >>= 1;	391	k >>= 1;
283	}	392	}
284		393
285	timers [k] = w;	394	heap [k] = w;
286	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
287		396
288	}	397	}
289		398
290	static void	399	static void
291	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
292	{	401	{
293	WT w = timers [k];	402	WT w = heap [k];
294		403
295	while (k < (N >> 1))	404	while (k < (N >> 1))
296	{	405	{
297	int j = k << 1;	406	int j = k << 1;
298		407
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	409	++j;
301		410
302	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
303	break;	412	break;
304		413
305	timers [k] = timers [j];	414	heap [k] = heap [j];
306	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
307	k = j;	416	k = j;
308	}	417	}
309		418
310	timers [k] = w;	419	heap [k] = w;
311	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
312	}	421	}
313		422
314	/*****************************************************************************/	423	/*****************************************************************************/
315		424
316	typedef struct	425	typedef struct
317	{	426	{
318	struct ev_signal *head;	427	struct ev_watcher_list *head;
319	sig_atomic_t gotsig;	428	sig_atomic_t volatile gotsig;
320	} ANSIG;	429	} ANSIG;
321		430
322	static ANSIG *signals;	431	static ANSIG *signals;
323	static int signalmax;	432	static int signalmax;
324		433
325	static int sigpipe [2];	434	static int sigpipe [2];
326	static sig_atomic_t gotsig;	435	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;	436	static struct ev_io sigev;
328		437
329	static void	438	static void
330	signals_init (ANSIG *base, int count)	439	signals_init (ANSIG *base, int count)
331	{	440	{
332	while (count--)	441	while (count--)
333	{	442	{
334	base->head = 0;	443	base->head = 0;
335	base->gotsig = 0;	444	base->gotsig = 0;
		445
336	++base;	446	++base;
337	}	447	}
338	}	448	}
339		449
340	static void	450	static void
…		…
342	{	452	{
343	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
344		454
345	if (!gotsig)	455	if (!gotsig)
346	{	456	{
		457	int old_errno = errno;
347	gotsig = 1;	458	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
349	}	461	}
350	}	462	}
351		463
352	static void	464	static void
353	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	466	{
355	struct ev_signal *w;	467	struct ev_watcher_list *w;
356	int sig;	468	int signum;
357		469
		470	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	471	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		472
361	for (sig = signalmax; sig--; )	473	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	474	if (signals [signum].gotsig)
363	{	475	{
364	signals [sig].gotsig = 0;	476	signals [signum].gotsig = 0;
365		477
366	for (w = signals [sig].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
368	}	480	}
369	}	481	}
370		482
371	static void	483	static void
372	siginit (void)	484	siginit (EV_P)
373	{	485	{
		486	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		489
377	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
380		494
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	498	}
384		499
385	/*****************************************************************************/	500	/*****************************************************************************/
386		501
387	static struct ev_idle **idles;	502	#ifndef WIN32
388	static int idlemax, idlecnt;
389
390	static struct ev_prepare **prepares;
391	static int preparemax, preparecnt;
392
393	static struct ev_check **checks;
394	static int checkmax, checkcnt;
395
396	/*****************************************************************************/
397		503
398	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;	505	static struct ev_signal childev;
400		506
401	#ifndef WCONTINUED	507	#ifndef WCONTINUED
402	# define WCONTINUED 0	508	# define WCONTINUED 0
403	#endif	509	#endif
404		510
405	static void	511	static void
406	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	513	{
408	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		517	if (w->pid == pid || !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it *now* */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
409	int pid, status;	529	int pid, status;
410		530
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
413	if (w->pid == pid || w->pid == -1)	533	/* make sure we are called again until all childs have been reaped */
414	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	535
416	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
417	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
418	}	539	}
		540
		541	#endif
419		542
420	/*****************************************************************************/	543	/*****************************************************************************/
421		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
422	#if EV_USE_EPOLL	548	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	549	# include "ev_epoll.c"
424	#endif	550	#endif
		551	#if EV_USE_POLL
		552	# include "ev_poll.c"
		553	#endif
425	#if EV_USE_SELECT	554	#if EV_USE_SELECT
426	# include "ev_select.c"	555	# include "ev_select.c"
427	#endif	556	#endif
428		557
429	int	558	int
…		…
436	ev_version_minor (void)	565	ev_version_minor (void)
437	{	566	{
438	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
439	}	568	}
440		569
441	int ev_init (int flags)	570	/* return true if we are running with elevated privileges and should ignore env variables */
		571	static int
		572	enable_secure (void)
442	{	573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
		577	return getuid () != geteuid ()
		578	|| getgid () != getegid ();
		579	#endif
		580	}
		581
		582	int
		583	ev_method (EV_P)
		584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
443	if (!ev_method)	591	if (!method)
444	{	592	{
445	#if EV_USE_MONOTONIC	593	#if EV_USE_MONOTONIC
446	{	594	{
447	struct timespec ts;	595	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	597	have_monotonic = 1;
450	}	598	}
451	#endif	599	#endif
452		600
453	ev_now = ev_time ();	601	rt_now = ev_time ();
454	now = get_clock ();	602	mn_now = get_clock ();
		603	now_floor = mn_now;
455	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
456		605
457	if (pipe (sigpipe))	606	if (methods == EVMETHOD_AUTO)
458	return 0;	607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		608	methods = atoi (getenv ("LIBEV_METHODS"));
		609	else
460	ev_method = EVMETHOD_NONE;	610	methods = EVMETHOD_ANY;
		611
		612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
461	#if EV_USE_EPOLL	616	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		618	#endif
		619	#if EV_USE_POLL
		620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
463	#endif	621	#endif
464	#if EV_USE_SELECT	622	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	624	#endif
		625	}
		626	}
467		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/*TODO*/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/*TODO*/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
		702	if (pipe (sigpipe))
		703	return 0;
		704
		705	if (!default_loop)
		706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
468	if (ev_method)	715	if (ev_method (EV_A))
469	{	716	{
470	ev_watcher_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
471	siginit ();	719	siginit (EV_A);
472		720
		721	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
475	}	727	}
		728	else
		729	default_loop = 0;
476	}	730	}
477		731
478	return ev_method;	732	return default_loop;
479	}	733	}
480		734
481	/*****************************************************************************/
482
483	void	735	void
484	ev_prefork (void)	736	ev_default_destroy (void)
485	{	737	{
486	/* nop */	738	#if EV_MULTIPLICITY
487	}	739	struct ev_loop *loop = default_loop;
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif	740	#endif
502		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
503	ev_io_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
504	close (sigpipe [0]);	764	close (sigpipe [0]);
505	close (sigpipe [1]);	765	close (sigpipe [1]);
506	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
507	siginit ();	769	siginit (EV_A);
508	}	770	}
509		771
510	/*****************************************************************************/	772	/*****************************************************************************/
511		773
512	static void	774	static void
513	call_pending (void)	775	call_pending (EV_P)
514	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	780	while (pendingcnt [pri])
516	{	781	{
517	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		783
519	if (p->w)	784	if (p->w)
520	{	785	{
521	p->w->pending = 0;	786	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
523	}	788	}
524	}	789	}
525	}	790	}
526		791
527	static void	792	static void
528	timers_reify (void)	793	timers_reify (EV_P)
529	{	794	{
530	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
531	{	796	{
532	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
533		798
534	event ((W)w, EV_TIMEOUT);	799	assert (("inactive timer on timer heap detected", ev_is_active (w)));
535		800
536	/* first reschedule or stop timer */	801	/* first reschedule or stop timer */
537	if (w->repeat)	802	if (w->repeat)
538	{	803	{
		804	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
539	w->at = now + w->repeat;	805	w->at = mn_now + w->repeat;
540	assert (("timer timeout in the past, negative repeat?", w->at > now));
541	downheap ((WT *)timers, timercnt, 0);	806	downheap ((WT *)timers, timercnt, 0);
542	}	807	}
543	else	808	else
544	ev_timer_stop (w); /* nonrepeating: stop timer */	809	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
545	}
546	}
547		810
		811	event (EV_A_ (W)w, EV_TIMEOUT);
		812	}
		813	}
		814
548	static void	815	static void
549	periodics_reify (void)	816	periodics_reify (EV_P)
550	{	817	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	818	while (periodiccnt && periodics [0]->at <= rt_now)
552	{	819	{
553	struct ev_periodic *w = periodics [0];	820	struct ev_periodic *w = periodics [0];
		821
		822	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
554		823
555	/* first reschedule or stop timer */	824	/* first reschedule or stop timer */
556	if (w->interval)	825	if (w->interval)
557	{	826	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	827	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
559	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));	828	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	829	downheap ((WT *)periodics, periodiccnt, 0);
561	}	830	}
562	else	831	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	832	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		833
565	event ((W)w, EV_TIMEOUT);	834	event (EV_A_ (W)w, EV_PERIODIC);
566	}	835	}
567	}	836	}
568		837
569	static void	838	static void
570	periodics_reschedule (ev_tstamp diff)	839	periodics_reschedule (EV_P)
571	{	840	{
572	int i;	841	int i;
573		842
574	/* adjust periodics after time jump */	843	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	844	for (i = 0; i < periodiccnt; ++i)
576	{	845	{
577	struct ev_periodic *w = periodics [i];	846	struct ev_periodic *w = periodics [i];
578		847
579	if (w->interval)	848	if (w->interval)
580	{	849	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	850	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
582		851
583	if (fabs (diff) >= 1e-4)	852	if (fabs (diff) >= 1e-4)
584	{	853	{
585	ev_periodic_stop (w);	854	ev_periodic_stop (EV_A_ w);
586	ev_periodic_start (w);	855	ev_periodic_start (EV_A_ w);
587		856
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	857	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	858	}
590	}	859	}
591	}	860	}
592	}	861	}
593		862
		863	inline int
		864	time_update_monotonic (EV_P)
		865	{
		866	mn_now = get_clock ();
		867
		868	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		869	{
		870	rt_now = rtmn_diff + mn_now;
		871	return 0;
		872	}
		873	else
		874	{
		875	now_floor = mn_now;
		876	rt_now = ev_time ();
		877	return 1;
		878	}
		879	}
		880
594	static void	881	static void
595	time_update (void)	882	time_update (EV_P)
596	{	883	{
597	int i;	884	int i;
598		885
599	ev_now = ev_time ();	886	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	887	if (expect_true (have_monotonic))
602	{	888	{
603	ev_tstamp odiff = diff;	889	if (time_update_monotonic (EV_A))
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	890	{
607	now = get_clock ();	891	ev_tstamp odiff = rtmn_diff;
		892
		893	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		894	{
608	diff = ev_now - now;	895	rtmn_diff = rt_now - mn_now;
609		896
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	897	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	898	return; /* all is well */
612		899
613	ev_now = ev_time ();	900	rt_now = ev_time ();
		901	mn_now = get_clock ();
		902	now_floor = mn_now;
		903	}
		904
		905	periodics_reschedule (EV_A);
		906	/* no timer adjustment, as the monotonic clock doesn't jump */
		907	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
614	}	908	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}	909	}
619	else	910	else
		911	#endif
620	{	912	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	913	rt_now = ev_time ();
		914
		915	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
622	{	916	{
623	periodics_reschedule (ev_now - now);	917	periodics_reschedule (EV_A);
624		918
625	/* adjust timers. this is easy, as the offset is the same for all */	919	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	920	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	921	timers [i]->at += rt_now - mn_now;
628	}	922	}
629		923
630	now = ev_now;	924	mn_now = rt_now;
631	}	925	}
632	}	926	}
633		927
634	int ev_loop_done;	928	void
		929	ev_ref (EV_P)
		930	{
		931	++activecnt;
		932	}
635		933
		934	void
		935	ev_unref (EV_P)
		936	{
		937	--activecnt;
		938	}
		939
		940	static int loop_done;
		941
		942	void
636	void ev_loop (int flags)	943	ev_loop (EV_P_ int flags)
637	{	944	{
638	double block;	945	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	946	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640		947
641	do	948	do
642	{	949	{
643	/* queue check watchers (and execute them) */	950	/* queue check watchers (and execute them) */
644	if (preparecnt)	951	if (expect_false (preparecnt))
645	{	952	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	953	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	954	call_pending (EV_A);
648	}	955	}
649		956
650	/* update fd-related kernel structures */	957	/* update fd-related kernel structures */
651	fd_reify ();	958	fd_reify (EV_A);
652		959
653	/* calculate blocking time */	960	/* calculate blocking time */
654		961
655	/* we only need this for !monotonic clockor timers, but as we basically	962	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */	963	always have timers, we just calculate it always */
		964	#if EV_USE_MONOTONIC
		965	if (expect_true (have_monotonic))
		966	time_update_monotonic (EV_A);
		967	else
		968	#endif
		969	{
657	ev_now = ev_time ();	970	rt_now = ev_time ();
		971	mn_now = rt_now;
		972	}
658		973
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	974	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	975	block = 0.;
661	else	976	else
662	{	977	{
663	block = MAX_BLOCKTIME;	978	block = MAX_BLOCKTIME;
664		979
665	if (timercnt)	980	if (timercnt)
666	{	981	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	982	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
668	if (block > to) block = to;	983	if (block > to) block = to;
669	}	984	}
670		985
671	if (periodiccnt)	986	if (periodiccnt)
672	{	987	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	988	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
674	if (block > to) block = to;	989	if (block > to) block = to;
675	}	990	}
676		991
677	if (block < 0.) block = 0.;	992	if (block < 0.) block = 0.;
678	}	993	}
679		994
680	method_poll (block);	995	method_poll (EV_A_ block);
681		996
682	/* update ev_now, do magic */	997	/* update rt_now, do magic */
683	time_update ();	998	time_update (EV_A);
684		999
685	/* queue pending timers and reschedule them */	1000	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	1001	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	1002	periodics_reify (EV_A); /* absolute timers called first */
688		1003
689	/* queue idle watchers unless io or timers are pending */	1004	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	1005	if (!pendingcnt)
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	1006	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		1007
693	/* queue check watchers, to be executed first */	1008	/* queue check watchers, to be executed first */
694	if (checkcnt)	1009	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	1010	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		1011
697	call_pending ();	1012	call_pending (EV_A);
698	}	1013	}
699	while (!ev_loop_done);	1014	while (activecnt && !loop_done);
700		1015
701	if (ev_loop_done != 2)	1016	if (loop_done != 2)
702	ev_loop_done = 0;	1017	loop_done = 0;
		1018	}
		1019
		1020	void
		1021	ev_unloop (EV_P_ int how)
		1022	{
		1023	loop_done = how;
703	}	1024	}
704		1025
705	/*****************************************************************************/	1026	/*****************************************************************************/
706		1027
707	static void	1028	inline void
708	wlist_add (WL *head, WL elem)	1029	wlist_add (WL *head, WL elem)
709	{	1030	{
710	elem->next = *head;	1031	elem->next = *head;
711	*head = elem;	1032	*head = elem;
712	}	1033	}
713		1034
714	static void	1035	inline void
715	wlist_del (WL *head, WL elem)	1036	wlist_del (WL *head, WL elem)
716	{	1037	{
717	while (*head)	1038	while (*head)
718	{	1039	{
719	if (*head == elem)	1040	if (*head == elem)
…		…
724		1045
725	head = &(*head)->next;	1046	head = &(*head)->next;
726	}	1047	}
727	}	1048	}
728		1049
729	static void	1050	inline void
730	ev_clear (W w)	1051	ev_clear_pending (EV_P_ W w)
731	{	1052	{
732	if (w->pending)	1053	if (w->pending)
733	{	1054	{
734	pendings [w->pending - 1].w = 0;	1055	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1056	w->pending = 0;
736	}	1057	}
737	}	1058	}
738		1059
739	static void	1060	inline void
740	ev_start (W w, int active)	1061	ev_start (EV_P_ W w, int active)
741	{	1062	{
		1063	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1064	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1065
742	w->active = active;	1066	w->active = active;
		1067	ev_ref (EV_A);
743	}	1068	}
744		1069
745	static void	1070	inline void
746	ev_stop (W w)	1071	ev_stop (EV_P_ W w)
747	{	1072	{
		1073	ev_unref (EV_A);
748	w->active = 0;	1074	w->active = 0;
749	}	1075	}
750		1076
751	/*****************************************************************************/	1077	/*****************************************************************************/
752		1078
753	void	1079	void
754	ev_io_start (struct ev_io *w)	1080	ev_io_start (EV_P_ struct ev_io *w)
755	{	1081	{
		1082	int fd = w->fd;
		1083
756	if (ev_is_active (w))	1084	if (ev_is_active (w))
757	return;	1085	return;
758		1086
759	int fd = w->fd;	1087	assert (("ev_io_start called with negative fd", fd >= 0));
760		1088
761	ev_start ((W)w, 1);	1089	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1090	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1091	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1092
765	fd_change (fd);	1093	fd_change (EV_A_ fd);
766	}	1094	}
767		1095
768	void	1096	void
769	ev_io_stop (struct ev_io *w)	1097	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1098	{
771	ev_clear ((W)w);	1099	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1100	if (!ev_is_active (w))
773	return;	1101	return;
774		1102
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1103	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
777		1105
778	fd_change (w->fd);	1106	fd_change (EV_A_ w->fd);
779	}	1107	}
780		1108
781	void	1109	void
782	ev_timer_start (struct ev_timer *w)	1110	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1111	{
784	if (ev_is_active (w))	1112	if (ev_is_active (w))
785	return;	1113	return;
786		1114
787	w->at += now;	1115	w->at += mn_now;
788		1116
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1117	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1118
791	ev_start ((W)w, ++timercnt);	1119	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1120	array_needsize (timers, timermax, timercnt, );
793	timers [timercnt - 1] = w;	1121	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1122	upheap ((WT *)timers, timercnt - 1);
795	}	1123	}
796		1124
797	void	1125	void
798	ev_timer_stop (struct ev_timer *w)	1126	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1127	{
800	ev_clear ((W)w);	1128	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
802	return;	1130	return;
803		1131
804	if (w->active < timercnt--)	1132	if (w->active < timercnt--)
805	{	1133	{
…		…
807	downheap ((WT *)timers, timercnt, w->active - 1);	1135	downheap ((WT *)timers, timercnt, w->active - 1);
808	}	1136	}
809		1137
810	w->at = w->repeat;	1138	w->at = w->repeat;
811		1139
812	ev_stop ((W)w);	1140	ev_stop (EV_A_ (W)w);
813	}	1141	}
814		1142
815	void	1143	void
816	ev_timer_again (struct ev_timer *w)	1144	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1145	{
818	if (ev_is_active (w))	1146	if (ev_is_active (w))
819	{	1147	{
820	if (w->repeat)	1148	if (w->repeat)
821	{	1149	{
822	w->at = now + w->repeat;	1150	w->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, w->active - 1);
824	}	1152	}
825	else	1153	else
826	ev_timer_stop (w);	1154	ev_timer_stop (EV_A_ w);
827	}	1155	}
828	else if (w->repeat)	1156	else if (w->repeat)
829	ev_timer_start (w);	1157	ev_timer_start (EV_A_ w);
830	}	1158	}
831		1159
832	void	1160	void
833	ev_periodic_start (struct ev_periodic *w)	1161	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1162	{
835	if (ev_is_active (w))	1163	if (ev_is_active (w))
836	return;	1164	return;
837		1165
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1166	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
839		1167
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1168	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)	1169	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1170	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
843		1171
844	ev_start ((W)w, ++periodiccnt);	1172	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1173	array_needsize (periodics, periodicmax, periodiccnt, );
846	periodics [periodiccnt - 1] = w;	1174	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1175	upheap ((WT *)periodics, periodiccnt - 1);
848	}	1176	}
849		1177
850	void	1178	void
851	ev_periodic_stop (struct ev_periodic *w)	1179	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1180	{
853	ev_clear ((W)w);	1181	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1182	if (!ev_is_active (w))
855	return;	1183	return;
856		1184
857	if (w->active < periodiccnt--)	1185	if (w->active < periodiccnt--)
858	{	1186	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1187	periodics [w->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1188	downheap ((WT *)periodics, periodiccnt, w->active - 1);
861	}	1189	}
862		1190
863	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
864	}	1192	}
865		1193
866	void	1194	void
867	ev_signal_start (struct ev_signal *w)	1195	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1196	{
869	if (ev_is_active (w))	1197	if (ev_is_active (w))
870	return;	1198	return;
871		1199
		1200	ev_start (EV_A_ (W)w, ++idlecnt);
		1201	array_needsize (idles, idlemax, idlecnt, );
		1202	idles [idlecnt - 1] = w;
		1203	}
		1204
		1205	void
		1206	ev_idle_stop (EV_P_ struct ev_idle *w)
		1207	{
		1208	ev_clear_pending (EV_A_ (W)w);
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	idles [w->active - 1] = idles [--idlecnt];
		1213	ev_stop (EV_A_ (W)w);
		1214	}
		1215
		1216	void
		1217	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1218	{
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	ev_start (EV_A_ (W)w, ++preparecnt);
		1223	array_needsize (prepares, preparemax, preparecnt, );
		1224	prepares [preparecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	prepares [w->active - 1] = prepares [--preparecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_check_start (EV_P_ struct ev_check *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++checkcnt);
		1245	array_needsize (checks, checkmax, checkcnt, );
		1246	checks [checkcnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_check_stop (EV_P_ struct ev_check *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	checks [w->active - 1] = checks [--checkcnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	#ifndef SA_RESTART
		1261	# define SA_RESTART 0
		1262	#endif
		1263
		1264	void
		1265	ev_signal_start (EV_P_ struct ev_signal *w)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1269	#endif
		1270	if (ev_is_active (w))
		1271	return;
		1272
		1273	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1274
872	ev_start ((W)w, 1);	1275	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1276	array_needsize (signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1277	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1278
876	if (!w->next)	1279	if (!w->next)
877	{	1280	{
878	struct sigaction sa;	1281	struct sigaction sa;
879	sa.sa_handler = sighandler;	1282	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1283	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1284	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1285	sigaction (w->signum, &sa, 0);
883	}	1286	}
884	}	1287	}
885		1288
886	void	1289	void
887	ev_signal_stop (struct ev_signal *w)	1290	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1291	{
889	ev_clear ((W)w);	1292	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1293	if (!ev_is_active (w))
891	return;	1294	return;
892		1295
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1296	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1297	ev_stop (EV_A_ (W)w);
895		1298
896	if (!signals [w->signum - 1].head)	1299	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1300	signal (w->signum, SIG_DFL);
898	}	1301	}
899		1302
900	void	1303	void
901	ev_idle_start (struct ev_idle *w)	1304	ev_child_start (EV_P_ struct ev_child *w)
902	{	1305	{
		1306	#if EV_MULTIPLICITY
		1307	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1308	#endif
903	if (ev_is_active (w))	1309	if (ev_is_active (w))
904	return;	1310	return;
905		1311
906	ev_start ((W)w, ++idlecnt);	1312	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1313	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1314	}
910		1315
911	void	1316	void
912	ev_idle_stop (struct ev_idle *w)	1317	ev_child_stop (EV_P_ struct ev_child *w)
913	{	1318	{
914	ev_clear ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1320	if (ev_is_active (w))
916	return;	1321	return;
917		1322
918	idles [w->active - 1] = idles [--idlecnt];
919	ev_stop ((W)w);
920	}
921
922	void
923	ev_prepare_start (struct ev_prepare *w)
924	{
925	if (ev_is_active (w))
926	return;
927
928	ev_start ((W)w, ++preparecnt);
929	array_needsize (prepares, preparemax, preparecnt, );
930	prepares [preparecnt - 1] = w;
931	}
932
933	void
934	ev_prepare_stop (struct ev_prepare *w)
935	{
936	ev_clear ((W)w);
937	if (ev_is_active (w))
938	return;
939
940	prepares [w->active - 1] = prepares [--preparecnt];
941	ev_stop ((W)w);
942	}
943
944	void
945	ev_check_start (struct ev_check *w)
946	{
947	if (ev_is_active (w))
948	return;
949
950	ev_start ((W)w, ++checkcnt);
951	array_needsize (checks, checkmax, checkcnt, );
952	checks [checkcnt - 1] = w;
953	}
954
955	void
956	ev_check_stop (struct ev_check *w)
957	{
958	ev_clear ((W)w);
959	if (ev_is_active (w))
960	return;
961
962	checks [w->active - 1] = checks [--checkcnt];
963	ev_stop ((W)w);
964	}
965
966	void
967	ev_child_start (struct ev_child *w)
968	{
969	if (ev_is_active (w))
970	return;
971
972	ev_start ((W)w, 1);
973	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
974	}
975
976	void
977	ev_child_stop (struct ev_child *w)
978	{
979	ev_clear ((W)w);
980	if (ev_is_active (w))
981	return;
982
983	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1323	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1324	ev_stop (EV_A_ (W)w);
985	}	1325	}
986		1326
987	/*****************************************************************************/	1327	/*****************************************************************************/
988		1328
989	struct ev_once	1329	struct ev_once
…		…
993	void (*cb)(int revents, void *arg);	1333	void (*cb)(int revents, void *arg);
994	void *arg;	1334	void *arg;
995	};	1335	};
996		1336
997	static void	1337	static void
998	once_cb (struct ev_once *once, int revents)	1338	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1339	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1340	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1341	void *arg = once->arg;
1002		1342
1003	ev_io_stop (&once->io);	1343	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1344	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1345	free (once);
1006		1346
1007	cb (revents, arg);	1347	cb (revents, arg);
1008	}	1348	}
1009		1349
1010	static void	1350	static void
1011	once_cb_io (struct ev_io *w, int revents)	1351	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1352	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1353	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1354	}
1015		1355
1016	static void	1356	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1357	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1358	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1359	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1360	}
1021		1361
1022	void	1362	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1363	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1364	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1365	struct ev_once *once = malloc (sizeof (struct ev_once));
1026		1366
1027	if (!once)	1367	if (!once)
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1368	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1033		1373
1034	ev_watcher_init (&once->io, once_cb_io);	1374	ev_watcher_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1375	if (fd >= 0)
1036	{	1376	{
1037	ev_io_set (&once->io, fd, events);	1377	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1378	ev_io_start (EV_A_ &once->io);
1039	}	1379	}
1040		1380
1041	ev_watcher_init (&once->to, once_cb_to);	1381	ev_watcher_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1382	if (timeout >= 0.)
1043	{	1383	{
1044	ev_timer_set (&once->to, timeout, 0.);	1384	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1385	ev_timer_start (EV_A_ &once->to);
1046	}	1386	}
1047	}	1387	}
1048	}	1388	}
1049		1389
1050	/*****************************************************************************/
1051
1052	#if 0
1053
1054	struct ev_io wio;
1055
1056	static void
1057	sin_cb (struct ev_io *w, int revents)
1058	{
1059	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1060	}
1061
1062	static void
1063	ocb (struct ev_timer *w, int revents)
1064	{
1065	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1066	ev_timer_stop (w);
1067	ev_timer_start (w);
1068	}
1069
1070	static void
1071	scb (struct ev_signal *w, int revents)
1072	{
1073	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1074	ev_io_stop (&wio);
1075	ev_io_start (&wio);
1076	}
1077
1078	static void
1079	gcb (struct ev_signal *w, int revents)
1080	{
1081	fprintf (stderr, "generic %x\n", revents);
1082
1083	}
1084
1085	int main (void)
1086	{
1087	ev_init (0);
1088
1089	ev_io_init (&wio, sin_cb, 0, EV_READ);
1090	ev_io_start (&wio);
1091
1092	struct ev_timer t[10000];
1093
1094	#if 0
1095	int i;
1096	for (i = 0; i < 10000; ++i)
1097	{
1098	struct ev_timer *w = t + i;
1099	ev_watcher_init (w, ocb, i);
1100	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1101	ev_timer_start (w);
1102	if (drand48 () < 0.5)
1103	ev_timer_stop (w);
1104	}
1105	#endif
1106
1107	struct ev_timer t1;
1108	ev_timer_init (&t1, ocb, 5, 10);
1109	ev_timer_start (&t1);
1110
1111	struct ev_signal sig;
1112	ev_signal_init (&sig, scb, SIGQUIT);
1113	ev_signal_start (&sig);
1114
1115	struct ev_check cw;
1116	ev_check_init (&cw, gcb);
1117	ev_check_start (&cw);
1118
1119	struct ev_idle iw;
1120	ev_idle_init (&iw, gcb);
1121	ev_idle_start (&iw);
1122
1123	ev_loop (0);
1124
1125	return 0;
1126	}
1127
1128	#endif
1129
1130
1131
1132

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