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Comparing libev/ev.c (file contents):
Revision 1.34 by root, Thu Nov 1 11:43:11 2007 UTC vs.
Revision 1.64 by root, Sun Nov 4 23:14:11 2007 UTC

1	/*	1	/*
		2	* libev event processing core, watcher management
		3	*
2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
3	* All rights reserved.	5	* All rights reserved.
4	*	6	*
5	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions are	8	* modification, are permitted provided that the following conditions are
…		…
24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28	*/	30	*/
29	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
30	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
31	#endif	55	#endif
32		56
33	#include <math.h>	57	#include <math.h>
34	#include <stdlib.h>	58	#include <stdlib.h>
35	#include <unistd.h>	59	#include <unistd.h>
…		…
40	#include <stdio.h>	64	#include <stdio.h>
41		65
42	#include <assert.h>	66	#include <assert.h>
43	#include <errno.h>	67	#include <errno.h>
44	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
45	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
46	#include <sys/time.h>	72	#include <sys/time.h>
47	#include <time.h>	73	#include <time.h>
48		74
		75	/**/
		76
49	#ifndef EV_USE_MONOTONIC	77	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	78	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	79	#endif
54		80
55	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
57	#endif	83	#endif
58		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
59	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
61	#endif	91	#endif
62		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
		95	#endif
		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
		105	#ifndef EV_USE_REALTIME
		106	# define EV_USE_REALTIME 1
		107	#endif
		108
		109	/**/
		110
		111	#ifndef CLOCK_MONOTONIC
		112	# undef EV_USE_MONOTONIC
		113	# define EV_USE_MONOTONIC 0
		114	#endif
		115
63	#ifndef CLOCK_REALTIME	116	#ifndef CLOCK_REALTIME
		117	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	118	# define EV_USE_REALTIME 0
65	#endif	119	#endif
66	#ifndef EV_USE_REALTIME	120
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	121	/**/
68	#endif
69		122
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	123	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
71	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detetc time jumps) */	124	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
72	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */	125	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
73	#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	126	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		127
75	#include "ev.h"	128	#include "ev.h"
		129
		130	#if __GNUC__ >= 3
		131	# define expect(expr,value) __builtin_expect ((expr),(value))
		132	# define inline inline
		133	#else
		134	# define expect(expr,value) (expr)
		135	# define inline static
		136	#endif
		137
		138	#define expect_false(expr) expect ((expr) != 0, 0)
		139	#define expect_true(expr) expect ((expr) != 0, 1)
		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		143
77	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
80		147
81	static ev_tstamp now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
82	ev_tstamp ev_now;
83	int ev_method;
84
85	static int have_monotonic; /* runtime */
86
87	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
88	static void (*method_modify)(int fd, int oev, int nev);
89	static void (*method_poll)(ev_tstamp timeout);
90		149
91	/*****************************************************************************/	150	/*****************************************************************************/
92		151
93	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
94	ev_time (void)	186	ev_time (void)
95	{	187	{
96	#if EV_USE_REALTIME	188	#if EV_USE_REALTIME
97	struct timespec ts;	189	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	196	#endif
105	}	197	}
106		198
107	static ev_tstamp	199	inline ev_tstamp
108	get_clock (void)	200	get_clock (void)
109	{	201	{
110	#if EV_USE_MONOTONIC	202	#if EV_USE_MONOTONIC
111	if (have_monotonic)	203	if (expect_true (have_monotonic))
112	{	204	{
113	struct timespec ts;	205	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	206	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	208	}
117	#endif	209	#endif
118		210
119	return ev_time ();	211	return ev_time ();
120	}	212	}
121		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
		218	}
		219
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	220	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		221
124	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	223	if (expect_false ((cnt) > cur)) \
126	{ \	224	{ \
127	int newcnt = cur; \	225	int newcnt = cur; \
128	do \	226	do \
129	{ \	227	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	228	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	234	cur = newcnt; \
137	}	235	}
138		236
139	/*****************************************************************************/	237	/*****************************************************************************/
140		238
141	typedef struct
142	{
143	struct ev_io *head;
144	unsigned char events;
145	unsigned char reify;
146	} ANFD;
147
148	static ANFD *anfds;
149	static int anfdmax;
150
151	static void	239	static void
152	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
153	{	241	{
154	while (count--)	242	while (count--)
155	{	243	{
…		…
159		247
160	++base;	248	++base;
161	}	249	}
162	}	250	}
163		251
164	typedef struct
165	{
166	W w;
167	int events;
168	} ANPENDING;
169
170	static ANPENDING *pendings;
171	static int pendingmax, pendingcnt;
172
173	static void	252	static void
174	event (W w, int events)	253	event (EV_P_ W w, int events)
175	{	254	{
176	if (w->pending)	255	if (w->pending)
177	{	256	{
178	pendings [w->pending - 1].events |= events;	257	pendings [ABSPRI (w)][w->pending - 1].events |= events;
179	return;	258	return;
180	}	259	}
181		260
182	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
183	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
184	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
185	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
186	}	265	}
187		266
188	static void	267	static void
189	queue_events (W *events, int eventcnt, int type)	268	queue_events (EV_P_ W *events, int eventcnt, int type)
190	{	269	{
191	int i;	270	int i;
192		271
193	for (i = 0; i < eventcnt; ++i)	272	for (i = 0; i < eventcnt; ++i)
194	event (events [i], type);	273	event (EV_A_ events [i], type);
195	}	274	}
196		275
197	static void	276	static void
198	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
199	{	278	{
200	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
201	struct ev_io *w;	280	struct ev_io *w;
202		281
203	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
204	{	283	{
205	int ev = w->events & events;	284	int ev = w->events & events;
206		285
207	if (ev)	286	if (ev)
208	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
209	}	288	}
210	}	289	}
211		290
212	/*****************************************************************************/	291	/*****************************************************************************/
213		292
214	static int *fdchanges;
215	static int fdchangemax, fdchangecnt;
216
217	static void	293	static void
218	fd_reify (void)	294	fd_reify (EV_P)
219	{	295	{
220	int i;	296	int i;
221		297
222	for (i = 0; i < fdchangecnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
223	{	299	{
…		…
225	ANFD *anfd = anfds + fd;	301	ANFD *anfd = anfds + fd;
226	struct ev_io *w;	302	struct ev_io *w;
227		303
228	int events = 0;	304	int events = 0;
229		305
230	for (w = anfd->head; w; w = w->next)	306	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
231	events |= w->events;	307	events |= w->events;
232		308
233	anfd->reify = 0;	309	anfd->reify = 0;
234		310
235	if (anfd->events != events)
236	{
237	method_modify (fd, anfd->events, events);	311	method_modify (EV_A_ fd, anfd->events, events);
238	anfd->events = events;	312	anfd->events = events;
239	}
240	}	313	}
241		314
242	fdchangecnt = 0;	315	fdchangecnt = 0;
243	}	316	}
244		317
245	static void	318	static void
246	fd_change (int fd)	319	fd_change (EV_P_ int fd)
247	{	320	{
248	if (anfds [fd].reify || fdchangecnt < 0)	321	if (anfds [fd].reify || fdchangecnt < 0)
249	return;	322	return;
250		323
251	anfds [fd].reify = 1;	324	anfds [fd].reify = 1;
…		…
253	++fdchangecnt;	326	++fdchangecnt;
254	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	327	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
255	fdchanges [fdchangecnt - 1] = fd;	328	fdchanges [fdchangecnt - 1] = fd;
256	}	329	}
257		330
		331	static void
		332	fd_kill (EV_P_ int fd)
		333	{
		334	struct ev_io *w;
		335
		336	while ((w = (struct ev_io *)anfds [fd].head))
		337	{
		338	ev_io_stop (EV_A_ w);
		339	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		340	}
		341	}
		342
258	/* called on EBADF to verify fds */	343	/* called on EBADF to verify fds */
259	static void	344	static void
260	fd_recheck (void)	345	fd_ebadf (EV_P)
261	{	346	{
262	int fd;	347	int fd;
263		348
264	for (fd = 0; fd < anfdmax; ++fd)	349	for (fd = 0; fd < anfdmax; ++fd)
265	if (anfds [fd].events)	350	if (anfds [fd].events)
266	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	351	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
267	while (anfds [fd].head)	352	fd_kill (EV_A_ fd);
		353	}
		354
		355	/* called on ENOMEM in select/poll to kill some fds and retry */
		356	static void
		357	fd_enomem (EV_P)
		358	{
		359	int fd;
		360
		361	for (fd = anfdmax; fd--; )
		362	if (anfds [fd].events)
268	{	363	{
269	ev_io_stop (anfds [fd].head);	364	close (fd);
270	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE);	365	fd_kill (EV_A_ fd);
		366	return;
271	}	367	}
		368	}
		369
		370	/* susually called after fork if method needs to re-arm all fds from scratch */
		371	static void
		372	fd_rearm_all (EV_P)
		373	{
		374	int fd;
		375
		376	/* this should be highly optimised to not do anything but set a flag */
		377	for (fd = 0; fd < anfdmax; ++fd)
		378	if (anfds [fd].events)
		379	{
		380	anfds [fd].events = 0;
		381	fd_change (EV_A_ fd);
		382	}
272	}	383	}
273		384
274	/*****************************************************************************/	385	/*****************************************************************************/
275		386
276	static struct ev_timer **timers;
277	static int timermax, timercnt;
278
279	static struct ev_periodic **periodics;
280	static int periodicmax, periodiccnt;
281
282	static void	387	static void
283	upheap (WT *timers, int k)	388	upheap (WT *heap, int k)
284	{	389	{
285	WT w = timers [k];	390	WT w = heap [k];
286		391
287	while (k && timers [k >> 1]->at > w->at)	392	while (k && heap [k >> 1]->at > w->at)
288	{	393	{
289	timers [k] = timers [k >> 1];	394	heap [k] = heap [k >> 1];
290	timers [k]->active = k + 1;	395	((W)heap [k])->active = k + 1;
291	k >>= 1;	396	k >>= 1;
292	}	397	}
293		398
294	timers [k] = w;	399	heap [k] = w;
295	timers [k]->active = k + 1;	400	((W)heap [k])->active = k + 1;
296		401
297	}	402	}
298		403
299	static void	404	static void
300	downheap (WT *timers, int N, int k)	405	downheap (WT *heap, int N, int k)
301	{	406	{
302	WT w = timers [k];	407	WT w = heap [k];
303		408
304	while (k < (N >> 1))	409	while (k < (N >> 1))
305	{	410	{
306	int j = k << 1;	411	int j = k << 1;
307		412
308	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	413	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
309	++j;	414	++j;
310		415
311	if (w->at <= timers [j]->at)	416	if (w->at <= heap [j]->at)
312	break;	417	break;
313		418
314	timers [k] = timers [j];	419	heap [k] = heap [j];
315	timers [k]->active = k + 1;	420	((W)heap [k])->active = k + 1;
316	k = j;	421	k = j;
317	}	422	}
318		423
319	timers [k] = w;	424	heap [k] = w;
320	timers [k]->active = k + 1;	425	((W)heap [k])->active = k + 1;
321	}	426	}
322		427
323	/*****************************************************************************/	428	/*****************************************************************************/
324		429
325	typedef struct	430	typedef struct
326	{	431	{
327	struct ev_signal *head;	432	struct ev_watcher_list *head;
328	sig_atomic_t volatile gotsig;	433	sig_atomic_t volatile gotsig;
329	} ANSIG;	434	} ANSIG;
330		435
331	static ANSIG *signals;	436	static ANSIG *signals;
332	static int signalmax;	437	static int signalmax;
…		…
352	{	457	{
353	signals [signum - 1].gotsig = 1;	458	signals [signum - 1].gotsig = 1;
354		459
355	if (!gotsig)	460	if (!gotsig)
356	{	461	{
		462	int old_errno = errno;
357	gotsig = 1;	463	gotsig = 1;
358	write (sigpipe [1], &signum, 1);	464	write (sigpipe [1], &signum, 1);
		465	errno = old_errno;
359	}	466	}
360	}	467	}
361		468
362	static void	469	static void
363	sigcb (struct ev_io *iow, int revents)	470	sigcb (EV_P_ struct ev_io *iow, int revents)
364	{	471	{
365	struct ev_signal *w;	472	struct ev_watcher_list *w;
366	int sig;	473	int signum;
367		474
368	read (sigpipe [0], &revents, 1);	475	read (sigpipe [0], &revents, 1);
369	gotsig = 0;	476	gotsig = 0;
370		477
371	for (sig = signalmax; sig--; )	478	for (signum = signalmax; signum--; )
372	if (signals [sig].gotsig)	479	if (signals [signum].gotsig)
373	{	480	{
374	signals [sig].gotsig = 0;	481	signals [signum].gotsig = 0;
375		482
376	for (w = signals [sig].head; w; w = w->next)	483	for (w = signals [signum].head; w; w = w->next)
377	event ((W)w, EV_SIGNAL);	484	event (EV_A_ (W)w, EV_SIGNAL);
378	}	485	}
379	}	486	}
380		487
381	static void	488	static void
382	siginit (void)	489	siginit (EV_P)
383	{	490	{
		491	#ifndef WIN32
384	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	492	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
385	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	493	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
386		494
387	/* rather than sort out wether we really need nb, set it */	495	/* rather than sort out wether we really need nb, set it */
388	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	496	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
389	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	497	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		498	#endif
390		499
391	ev_io_set (&sigev, sigpipe [0], EV_READ);	500	ev_io_set (&sigev, sigpipe [0], EV_READ);
392	ev_io_start (&sigev);	501	ev_io_start (EV_A_ &sigev);
		502	ev_unref (EV_A); /* child watcher should not keep loop alive */
393	}	503	}
394		504
395	/*****************************************************************************/	505	/*****************************************************************************/
396		506
397	static struct ev_idle **idles;	507	#ifndef WIN32
398	static int idlemax, idlecnt;
399
400	static struct ev_prepare **prepares;
401	static int preparemax, preparecnt;
402
403	static struct ev_check **checks;
404	static int checkmax, checkcnt;
405
406	/*****************************************************************************/
407		508
408	static struct ev_child *childs [PID_HASHSIZE];	509	static struct ev_child *childs [PID_HASHSIZE];
409	static struct ev_signal childev;	510	static struct ev_signal childev;
410		511
411	#ifndef WCONTINUED	512	#ifndef WCONTINUED
412	# define WCONTINUED 0	513	# define WCONTINUED 0
413	#endif	514	#endif
414		515
415	static void	516	static void
416	childcb (struct ev_signal *sw, int revents)	517	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
417	{	518	{
418	struct ev_child *w;	519	struct ev_child *w;
		520
		521	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		522	if (w->pid == pid || !w->pid)
		523	{
		524	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
		525	w->rpid = pid;
		526	w->rstatus = status;
		527	event (EV_A_ (W)w, EV_CHILD);
		528	}
		529	}
		530
		531	static void
		532	childcb (EV_P_ struct ev_signal *sw, int revents)
		533	{
419	int pid, status;	534	int pid, status;
420		535
421	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	536	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
422	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	537	{
423	if (w->pid == pid || w->pid == -1)	538	/* make sure we are called again until all childs have been reaped */
424	{	539	event (EV_A_ (W)sw, EV_SIGNAL);
425	w->status = status;	540
426	event ((W)w, EV_CHILD);	541	child_reap (EV_A_ sw, pid, pid, status);
427	}	542	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		543	}
428	}	544	}
		545
		546	#endif
429		547
430	/*****************************************************************************/	548	/*****************************************************************************/
431		549
		550	#if EV_USE_KQUEUE
		551	# include "ev_kqueue.c"
		552	#endif
432	#if EV_USE_EPOLL	553	#if EV_USE_EPOLL
433	# include "ev_epoll.c"	554	# include "ev_epoll.c"
434	#endif	555	#endif
		556	#if EV_USE_POLL
		557	# include "ev_poll.c"
		558	#endif
435	#if EV_USE_SELECT	559	#if EV_USE_SELECT
436	# include "ev_select.c"	560	# include "ev_select.c"
437	#endif	561	#endif
438		562
439	int	563	int
…		…
446	ev_version_minor (void)	570	ev_version_minor (void)
447	{	571	{
448	return EV_VERSION_MINOR;	572	return EV_VERSION_MINOR;
449	}	573	}
450		574
451	int ev_init (int flags)	575	/* return true if we are running with elevated privileges and should ignore env variables */
		576	static int
		577	enable_secure (void)
452	{	578	{
		579	#ifdef WIN32
		580	return 0;
		581	#else
		582	return getuid () != geteuid ()
		583	|| getgid () != getegid ();
		584	#endif
		585	}
		586
		587	int
		588	ev_method (EV_P)
		589	{
		590	return method;
		591	}
		592
		593	static void
		594	loop_init (EV_P_ int methods)
		595	{
453	if (!ev_method)	596	if (!method)
454	{	597	{
455	#if EV_USE_MONOTONIC	598	#if EV_USE_MONOTONIC
456	{	599	{
457	struct timespec ts;	600	struct timespec ts;
458	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	601	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
459	have_monotonic = 1;	602	have_monotonic = 1;
460	}	603	}
461	#endif	604	#endif
462		605
463	ev_now = ev_time ();	606	rt_now = ev_time ();
464	now = get_clock ();	607	mn_now = get_clock ();
		608	now_floor = mn_now;
465	diff = ev_now - now;	609	rtmn_diff = rt_now - mn_now;
466		610
467	if (pipe (sigpipe))	611	if (methods == EVMETHOD_AUTO)
468	return 0;	612	if (!enable_secure () && getenv ("LIBEV_METHODS"))
469		613	methods = atoi (getenv ("LIBEV_METHODS"));
		614	else
470	ev_method = EVMETHOD_NONE;	615	methods = EVMETHOD_ANY;
		616
		617	method = 0;
		618	#if EV_USE_WIN32
		619	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		620	#endif
		621	#if EV_USE_KQUEUE
		622	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		623	#endif
471	#if EV_USE_EPOLL	624	#if EV_USE_EPOLL
472	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	625	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		626	#endif
		627	#if EV_USE_POLL
		628	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
473	#endif	629	#endif
474	#if EV_USE_SELECT	630	#if EV_USE_SELECT
475	if (ev_method == EVMETHOD_NONE) select_init (flags);	631	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
476	#endif	632	#endif
		633	}
		634	}
477		635
		636	void
		637	loop_destroy (EV_P)
		638	{
		639	#if EV_USE_WIN32
		640	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		641	#endif
		642	#if EV_USE_KQUEUE
		643	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		644	#endif
		645	#if EV_USE_EPOLL
		646	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		647	#endif
		648	#if EV_USE_POLL
		649	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_SELECT
		652	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		653	#endif
		654
		655	method = 0;
		656	/*TODO*/
		657	}
		658
		659	void
		660	loop_fork (EV_P)
		661	{
		662	/*TODO*/
		663	#if EV_USE_EPOLL
		664	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		665	#endif
		666	#if EV_USE_KQUEUE
		667	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		668	#endif
		669	}
		670
		671	#if EV_MULTIPLICITY
		672	struct ev_loop *
		673	ev_loop_new (int methods)
		674	{
		675	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		676
		677	loop_init (EV_A_ methods);
		678
		679	if (ev_method (EV_A))
		680	return loop;
		681
		682	return 0;
		683	}
		684
		685	void
		686	ev_loop_destroy (EV_P)
		687	{
		688	loop_destroy (EV_A);
		689	free (loop);
		690	}
		691
		692	void
		693	ev_loop_fork (EV_P)
		694	{
		695	loop_fork (EV_A);
		696	}
		697
		698	#endif
		699
		700	#if EV_MULTIPLICITY
		701	struct ev_loop default_loop_struct;
		702	static struct ev_loop *default_loop;
		703
		704	struct ev_loop *
		705	#else
		706	static int default_loop;
		707
		708	int
		709	#endif
		710	ev_default_loop (int methods)
		711	{
		712	if (sigpipe [0] == sigpipe [1])
		713	if (pipe (sigpipe))
		714	return 0;
		715
		716	if (!default_loop)
		717	{
		718	#if EV_MULTIPLICITY
		719	struct ev_loop *loop = default_loop = &default_loop_struct;
		720	#else
		721	default_loop = 1;
		722	#endif
		723
		724	loop_init (EV_A_ methods);
		725
478	if (ev_method)	726	if (ev_method (EV_A))
479	{	727	{
480	ev_watcher_init (&sigev, sigcb);	728	ev_watcher_init (&sigev, sigcb);
		729	ev_set_priority (&sigev, EV_MAXPRI);
481	siginit ();	730	siginit (EV_A);
482		731
		732	#ifndef WIN32
483	ev_signal_init (&childev, childcb, SIGCHLD);	733	ev_signal_init (&childev, childcb, SIGCHLD);
		734	ev_set_priority (&childev, EV_MAXPRI);
484	ev_signal_start (&childev);	735	ev_signal_start (EV_A_ &childev);
		736	ev_unref (EV_A); /* child watcher should not keep loop alive */
		737	#endif
485	}	738	}
		739	else
		740	default_loop = 0;
486	}	741	}
487		742
488	return ev_method;	743	return default_loop;
489	}	744	}
490		745
491	/*****************************************************************************/
492
493	void	746	void
494	ev_prefork (void)	747	ev_default_destroy (void)
495	{	748	{
496	/* nop */	749	#if EV_MULTIPLICITY
497	}	750	struct ev_loop *loop = default_loop;
498
499	void
500	ev_postfork_parent (void)
501	{
502	/* nop */
503	}
504
505	void
506	ev_postfork_child (void)
507	{
508	#if EV_USE_EPOLL
509	if (ev_method == EVMETHOD_EPOLL)
510	epoll_postfork_child ();
511	#endif	751	#endif
512		752
		753	ev_ref (EV_A); /* child watcher */
		754	ev_signal_stop (EV_A_ &childev);
		755
		756	ev_ref (EV_A); /* signal watcher */
513	ev_io_stop (&sigev);	757	ev_io_stop (EV_A_ &sigev);
		758
		759	close (sigpipe [0]); sigpipe [0] = 0;
		760	close (sigpipe [1]); sigpipe [1] = 0;
		761
		762	loop_destroy (EV_A);
		763	}
		764
		765	void
		766	ev_default_fork (void)
		767	{
		768	#if EV_MULTIPLICITY
		769	struct ev_loop *loop = default_loop;
		770	#endif
		771
		772	loop_fork (EV_A);
		773
		774	ev_io_stop (EV_A_ &sigev);
514	close (sigpipe [0]);	775	close (sigpipe [0]);
515	close (sigpipe [1]);	776	close (sigpipe [1]);
516	pipe (sigpipe);	777	pipe (sigpipe);
		778
		779	ev_ref (EV_A); /* signal watcher */
517	siginit ();	780	siginit (EV_A);
518	}	781	}
519		782
520	/*****************************************************************************/	783	/*****************************************************************************/
521		784
522	static void	785	static void
523	call_pending (void)	786	call_pending (EV_P)
524	{	787	{
		788	int pri;
		789
		790	for (pri = NUMPRI; pri--; )
525	while (pendingcnt)	791	while (pendingcnt [pri])
526	{	792	{
527	ANPENDING *p = pendings + --pendingcnt;	793	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
528		794
529	if (p->w)	795	if (p->w)
530	{	796	{
531	p->w->pending = 0;	797	p->w->pending = 0;
532	p->w->cb (p->w, p->events);	798
		799	(*(void (**)(EV_P_ W, int))&p->w->cb) (EV_A_ p->w, p->events);
533	}	800	}
534	}	801	}
535	}	802	}
536		803
537	static void	804	static void
538	timers_reify (void)	805	timers_reify (EV_P)
539	{	806	{
540	while (timercnt && timers [0]->at <= now)	807	while (timercnt && ((WT)timers [0])->at <= mn_now)
541	{	808	{
542	struct ev_timer *w = timers [0];	809	struct ev_timer *w = timers [0];
		810
		811	assert (("inactive timer on timer heap detected", ev_is_active (w)));
543		812
544	/* first reschedule or stop timer */	813	/* first reschedule or stop timer */
545	if (w->repeat)	814	if (w->repeat)
546	{	815	{
547	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	816	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
548	w->at = now + w->repeat;	817	((WT)w)->at = mn_now + w->repeat;
549	downheap ((WT *)timers, timercnt, 0);	818	downheap ((WT *)timers, timercnt, 0);
550	}	819	}
551	else	820	else
552	ev_timer_stop (w); /* nonrepeating: stop timer */	821	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
553		822
554	event ((W)w, EV_TIMEOUT);	823	event (EV_A_ (W)w, EV_TIMEOUT);
555	}	824	}
556	}	825	}
557		826
558	static void	827	static void
559	periodics_reify (void)	828	periodics_reify (EV_P)
560	{	829	{
561	while (periodiccnt && periodics [0]->at <= ev_now)	830	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
562	{	831	{
563	struct ev_periodic *w = periodics [0];	832	struct ev_periodic *w = periodics [0];
		833
		834	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
564		835
565	/* first reschedule or stop timer */	836	/* first reschedule or stop timer */
566	if (w->interval)	837	if (w->interval)
567	{	838	{
568	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	839	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
569	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	840	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
570	downheap ((WT *)periodics, periodiccnt, 0);	841	downheap ((WT *)periodics, periodiccnt, 0);
571	}	842	}
572	else	843	else
573	ev_periodic_stop (w); /* nonrepeating: stop timer */	844	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
574		845
575	event ((W)w, EV_PERIODIC);	846	event (EV_A_ (W)w, EV_PERIODIC);
576	}	847	}
577	}	848	}
578		849
579	static void	850	static void
580	periodics_reschedule (ev_tstamp diff)	851	periodics_reschedule (EV_P)
581	{	852	{
582	int i;	853	int i;
583		854
584	/* adjust periodics after time jump */	855	/* adjust periodics after time jump */
585	for (i = 0; i < periodiccnt; ++i)	856	for (i = 0; i < periodiccnt; ++i)
586	{	857	{
587	struct ev_periodic *w = periodics [i];	858	struct ev_periodic *w = periodics [i];
588		859
589	if (w->interval)	860	if (w->interval)
590	{	861	{
591	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	862	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
592		863
593	if (fabs (diff) >= 1e-4)	864	if (fabs (diff) >= 1e-4)
594	{	865	{
595	ev_periodic_stop (w);	866	ev_periodic_stop (EV_A_ w);
596	ev_periodic_start (w);	867	ev_periodic_start (EV_A_ w);
597		868
598	i = 0; /* restart loop, inefficient, but time jumps should be rare */	869	i = 0; /* restart loop, inefficient, but time jumps should be rare */
599	}	870	}
600	}	871	}
601	}	872	}
602	}	873	}
603		874
		875	inline int
		876	time_update_monotonic (EV_P)
		877	{
		878	mn_now = get_clock ();
		879
		880	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		881	{
		882	rt_now = rtmn_diff + mn_now;
		883	return 0;
		884	}
		885	else
		886	{
		887	now_floor = mn_now;
		888	rt_now = ev_time ();
		889	return 1;
		890	}
		891	}
		892
604	static void	893	static void
605	time_update (void)	894	time_update (EV_P)
606	{	895	{
607	int i;	896	int i;
608		897
609	ev_now = ev_time ();	898	#if EV_USE_MONOTONIC
610
611	if (have_monotonic)	899	if (expect_true (have_monotonic))
612	{	900	{
613	ev_tstamp odiff = diff;	901	if (time_update_monotonic (EV_A))
614
615	for (i = 4; --i; ) /* loop a few times, before making important decisions */
616	{	902	{
617	now = get_clock ();	903	ev_tstamp odiff = rtmn_diff;
		904
		905	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		906	{
618	diff = ev_now - now;	907	rtmn_diff = rt_now - mn_now;
619		908
620	if (fabs (odiff - diff) < MIN_TIMEJUMP)	909	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
621	return; /* all is well */	910	return; /* all is well */
622		911
623	ev_now = ev_time ();	912	rt_now = ev_time ();
		913	mn_now = get_clock ();
		914	now_floor = mn_now;
		915	}
		916
		917	periodics_reschedule (EV_A);
		918	/* no timer adjustment, as the monotonic clock doesn't jump */
		919	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
624	}	920	}
625
626	periodics_reschedule (diff - odiff);
627	/* no timer adjustment, as the monotonic clock doesn't jump */
628	}	921	}
629	else	922	else
		923	#endif
630	{	924	{
631	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	925	rt_now = ev_time ();
		926
		927	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
632	{	928	{
633	periodics_reschedule (ev_now - now);	929	periodics_reschedule (EV_A);
634		930
635	/* adjust timers. this is easy, as the offset is the same for all */	931	/* adjust timers. this is easy, as the offset is the same for all */
636	for (i = 0; i < timercnt; ++i)	932	for (i = 0; i < timercnt; ++i)
637	timers [i]->at += diff;	933	((WT)timers [i])->at += rt_now - mn_now;
638	}	934	}
639		935
640	now = ev_now;	936	mn_now = rt_now;
641	}	937	}
642	}	938	}
643		939
644	int ev_loop_done;	940	void
		941	ev_ref (EV_P)
		942	{
		943	++activecnt;
		944	}
645		945
		946	void
		947	ev_unref (EV_P)
		948	{
		949	--activecnt;
		950	}
		951
		952	static int loop_done;
		953
		954	void
646	void ev_loop (int flags)	955	ev_loop (EV_P_ int flags)
647	{	956	{
648	double block;	957	double block;
649	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	958	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
650		959
651	do	960	do
652	{	961	{
653	/* queue check watchers (and execute them) */	962	/* queue check watchers (and execute them) */
654	if (preparecnt)	963	if (expect_false (preparecnt))
655	{	964	{
656	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	965	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
657	call_pending ();	966	call_pending (EV_A);
658	}	967	}
659		968
660	/* update fd-related kernel structures */	969	/* update fd-related kernel structures */
661	fd_reify ();	970	fd_reify (EV_A);
662		971
663	/* calculate blocking time */	972	/* calculate blocking time */
664		973
665	/* we only need this for !monotonic clockor timers, but as we basically	974	/* we only need this for !monotonic clockor timers, but as we basically
666	always have timers, we just calculate it always */	975	always have timers, we just calculate it always */
		976	#if EV_USE_MONOTONIC
		977	if (expect_true (have_monotonic))
		978	time_update_monotonic (EV_A);
		979	else
		980	#endif
		981	{
667	ev_now = ev_time ();	982	rt_now = ev_time ();
		983	mn_now = rt_now;
		984	}
668		985
669	if (flags & EVLOOP_NONBLOCK || idlecnt)	986	if (flags & EVLOOP_NONBLOCK || idlecnt)
670	block = 0.;	987	block = 0.;
671	else	988	else
672	{	989	{
673	block = MAX_BLOCKTIME;	990	block = MAX_BLOCKTIME;
674		991
675	if (timercnt)	992	if (timercnt)
676	{	993	{
677	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	994	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
678	if (block > to) block = to;	995	if (block > to) block = to;
679	}	996	}
680		997
681	if (periodiccnt)	998	if (periodiccnt)
682	{	999	{
683	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1000	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
684	if (block > to) block = to;	1001	if (block > to) block = to;
685	}	1002	}
686		1003
687	if (block < 0.) block = 0.;	1004	if (block < 0.) block = 0.;
688	}	1005	}
689		1006
690	method_poll (block);	1007	method_poll (EV_A_ block);
691		1008
692	/* update ev_now, do magic */	1009	/* update rt_now, do magic */
693	time_update ();	1010	time_update (EV_A);
694		1011
695	/* queue pending timers and reschedule them */	1012	/* queue pending timers and reschedule them */
696	timers_reify (); /* relative timers called last */	1013	timers_reify (EV_A); /* relative timers called last */
697	periodics_reify (); /* absolute timers called first */	1014	periodics_reify (EV_A); /* absolute timers called first */
698		1015
699	/* queue idle watchers unless io or timers are pending */	1016	/* queue idle watchers unless io or timers are pending */
700	if (!pendingcnt)	1017	if (!pendingcnt)
701	queue_events ((W *)idles, idlecnt, EV_IDLE);	1018	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
702		1019
703	/* queue check watchers, to be executed first */	1020	/* queue check watchers, to be executed first */
704	if (checkcnt)	1021	if (checkcnt)
705	queue_events ((W *)checks, checkcnt, EV_CHECK);	1022	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
706		1023
707	call_pending ();	1024	call_pending (EV_A);
708	}	1025	}
709	while (!ev_loop_done);	1026	while (activecnt && !loop_done);
710		1027
711	if (ev_loop_done != 2)	1028	if (loop_done != 2)
712	ev_loop_done = 0;	1029	loop_done = 0;
		1030	}
		1031
		1032	void
		1033	ev_unloop (EV_P_ int how)
		1034	{
		1035	loop_done = how;
713	}	1036	}
714		1037
715	/*****************************************************************************/	1038	/*****************************************************************************/
716		1039
717	static void	1040	inline void
718	wlist_add (WL *head, WL elem)	1041	wlist_add (WL *head, WL elem)
719	{	1042	{
720	elem->next = *head;	1043	elem->next = *head;
721	*head = elem;	1044	*head = elem;
722	}	1045	}
723		1046
724	static void	1047	inline void
725	wlist_del (WL *head, WL elem)	1048	wlist_del (WL *head, WL elem)
726	{	1049	{
727	while (*head)	1050	while (*head)
728	{	1051	{
729	if (*head == elem)	1052	if (*head == elem)
…		…
734		1057
735	head = &(*head)->next;	1058	head = &(*head)->next;
736	}	1059	}
737	}	1060	}
738		1061
739	static void	1062	inline void
740	ev_clear_pending (W w)	1063	ev_clear_pending (EV_P_ W w)
741	{	1064	{
742	if (w->pending)	1065	if (w->pending)
743	{	1066	{
744	pendings [w->pending - 1].w = 0;	1067	pendings [ABSPRI (w)][w->pending - 1].w = 0;
745	w->pending = 0;	1068	w->pending = 0;
746	}	1069	}
747	}	1070	}
748		1071
749	static void	1072	inline void
750	ev_start (W w, int active)	1073	ev_start (EV_P_ W w, int active)
751	{	1074	{
		1075	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1076	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1077
752	w->active = active;	1078	w->active = active;
		1079	ev_ref (EV_A);
753	}	1080	}
754		1081
755	static void	1082	inline void
756	ev_stop (W w)	1083	ev_stop (EV_P_ W w)
757	{	1084	{
		1085	ev_unref (EV_A);
758	w->active = 0;	1086	w->active = 0;
759	}	1087	}
760		1088
761	/*****************************************************************************/	1089	/*****************************************************************************/
762		1090
763	void	1091	void
764	ev_io_start (struct ev_io *w)	1092	ev_io_start (EV_P_ struct ev_io *w)
765	{	1093	{
		1094	int fd = w->fd;
		1095
766	if (ev_is_active (w))	1096	if (ev_is_active (w))
767	return;	1097	return;
768		1098
769	int fd = w->fd;
770
771	assert (("ev_io_start called with negative fd", fd >= 0));	1099	assert (("ev_io_start called with negative fd", fd >= 0));
772		1100
773	ev_start ((W)w, 1);	1101	ev_start (EV_A_ (W)w, 1);
774	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1102	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
775	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1103	wlist_add ((WL *)&anfds[fd].head, (WL)w);
776		1104
777	fd_change (fd);	1105	fd_change (EV_A_ fd);
778	}	1106	}
779		1107
780	void	1108	void
781	ev_io_stop (struct ev_io *w)	1109	ev_io_stop (EV_P_ struct ev_io *w)
782	{	1110	{
783	ev_clear_pending ((W)w);	1111	ev_clear_pending (EV_A_ (W)w);
784	if (!ev_is_active (w))	1112	if (!ev_is_active (w))
785	return;	1113	return;
786		1114
787	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1115	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
788	ev_stop ((W)w);	1116	ev_stop (EV_A_ (W)w);
789		1117
790	fd_change (w->fd);	1118	fd_change (EV_A_ w->fd);
791	}	1119	}
792		1120
793	void	1121	void
794	ev_timer_start (struct ev_timer *w)	1122	ev_timer_start (EV_P_ struct ev_timer *w)
795	{	1123	{
796	if (ev_is_active (w))	1124	if (ev_is_active (w))
797	return;	1125	return;
798		1126
799	w->at += now;	1127	((WT)w)->at += mn_now;
800		1128
801	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1129	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
802		1130
803	ev_start ((W)w, ++timercnt);	1131	ev_start (EV_A_ (W)w, ++timercnt);
804	array_needsize (timers, timermax, timercnt, );	1132	array_needsize (timers, timermax, timercnt, );
805	timers [timercnt - 1] = w;	1133	timers [timercnt - 1] = w;
806	upheap ((WT *)timers, timercnt - 1);	1134	upheap ((WT *)timers, timercnt - 1);
807	}
808		1135
		1136	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1137	}
		1138
809	void	1139	void
810	ev_timer_stop (struct ev_timer *w)	1140	ev_timer_stop (EV_P_ struct ev_timer *w)
811	{	1141	{
812	ev_clear_pending ((W)w);	1142	ev_clear_pending (EV_A_ (W)w);
813	if (!ev_is_active (w))	1143	if (!ev_is_active (w))
814	return;	1144	return;
815		1145
		1146	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1147
816	if (w->active < timercnt--)	1148	if (((W)w)->active < timercnt--)
817	{	1149	{
818	timers [w->active - 1] = timers [timercnt];	1150	timers [((W)w)->active - 1] = timers [timercnt];
819	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
820	}	1152	}
821		1153
822	w->at = w->repeat;	1154	((WT)w)->at = w->repeat;
823		1155
824	ev_stop ((W)w);	1156	ev_stop (EV_A_ (W)w);
825	}	1157	}
826		1158
827	void	1159	void
828	ev_timer_again (struct ev_timer *w)	1160	ev_timer_again (EV_P_ struct ev_timer *w)
829	{	1161	{
830	if (ev_is_active (w))	1162	if (ev_is_active (w))
831	{	1163	{
832	if (w->repeat)	1164	if (w->repeat)
833	{	1165	{
834	w->at = now + w->repeat;	1166	((WT)w)->at = mn_now + w->repeat;
835	downheap ((WT *)timers, timercnt, w->active - 1);	1167	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
836	}	1168	}
837	else	1169	else
838	ev_timer_stop (w);	1170	ev_timer_stop (EV_A_ w);
839	}	1171	}
840	else if (w->repeat)	1172	else if (w->repeat)
841	ev_timer_start (w);	1173	ev_timer_start (EV_A_ w);
842	}	1174	}
843		1175
844	void	1176	void
845	ev_periodic_start (struct ev_periodic *w)	1177	ev_periodic_start (EV_P_ struct ev_periodic *w)
846	{	1178	{
847	if (ev_is_active (w))	1179	if (ev_is_active (w))
848	return;	1180	return;
849		1181
850	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1182	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
851		1183
852	/* this formula differs from the one in periodic_reify because we do not always round up */	1184	/* this formula differs from the one in periodic_reify because we do not always round up */
853	if (w->interval)	1185	if (w->interval)
854	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1186	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
855		1187
856	ev_start ((W)w, ++periodiccnt);	1188	ev_start (EV_A_ (W)w, ++periodiccnt);
857	array_needsize (periodics, periodicmax, periodiccnt, );	1189	array_needsize (periodics, periodicmax, periodiccnt, );
858	periodics [periodiccnt - 1] = w;	1190	periodics [periodiccnt - 1] = w;
859	upheap ((WT *)periodics, periodiccnt - 1);	1191	upheap ((WT *)periodics, periodiccnt - 1);
860	}
861		1192
		1193	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1194	}
		1195
862	void	1196	void
863	ev_periodic_stop (struct ev_periodic *w)	1197	ev_periodic_stop (EV_P_ struct ev_periodic *w)
864	{	1198	{
865	ev_clear_pending ((W)w);	1199	ev_clear_pending (EV_A_ (W)w);
866	if (!ev_is_active (w))	1200	if (!ev_is_active (w))
867	return;	1201	return;
868		1202
		1203	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1204
869	if (w->active < periodiccnt--)	1205	if (((W)w)->active < periodiccnt--)
870	{	1206	{
871	periodics [w->active - 1] = periodics [periodiccnt];	1207	periodics [((W)w)->active - 1] = periodics [periodiccnt];
872	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1208	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
873	}	1209	}
874		1210
875	ev_stop ((W)w);	1211	ev_stop (EV_A_ (W)w);
876	}	1212	}
877		1213
878	void	1214	void
879	ev_signal_start (struct ev_signal *w)	1215	ev_idle_start (EV_P_ struct ev_idle *w)
880	{	1216	{
881	if (ev_is_active (w))	1217	if (ev_is_active (w))
882	return;	1218	return;
883		1219
		1220	ev_start (EV_A_ (W)w, ++idlecnt);
		1221	array_needsize (idles, idlemax, idlecnt, );
		1222	idles [idlecnt - 1] = w;
		1223	}
		1224
		1225	void
		1226	ev_idle_stop (EV_P_ struct ev_idle *w)
		1227	{
		1228	ev_clear_pending (EV_A_ (W)w);
		1229	if (ev_is_active (w))
		1230	return;
		1231
		1232	idles [((W)w)->active - 1] = idles [--idlecnt];
		1233	ev_stop (EV_A_ (W)w);
		1234	}
		1235
		1236	void
		1237	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1238	{
		1239	if (ev_is_active (w))
		1240	return;
		1241
		1242	ev_start (EV_A_ (W)w, ++preparecnt);
		1243	array_needsize (prepares, preparemax, preparecnt, );
		1244	prepares [preparecnt - 1] = w;
		1245	}
		1246
		1247	void
		1248	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1249	{
		1250	ev_clear_pending (EV_A_ (W)w);
		1251	if (ev_is_active (w))
		1252	return;
		1253
		1254	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1255	ev_stop (EV_A_ (W)w);
		1256	}
		1257
		1258	void
		1259	ev_check_start (EV_P_ struct ev_check *w)
		1260	{
		1261	if (ev_is_active (w))
		1262	return;
		1263
		1264	ev_start (EV_A_ (W)w, ++checkcnt);
		1265	array_needsize (checks, checkmax, checkcnt, );
		1266	checks [checkcnt - 1] = w;
		1267	}
		1268
		1269	void
		1270	ev_check_stop (EV_P_ struct ev_check *w)
		1271	{
		1272	ev_clear_pending (EV_A_ (W)w);
		1273	if (ev_is_active (w))
		1274	return;
		1275
		1276	checks [((W)w)->active - 1] = checks [--checkcnt];
		1277	ev_stop (EV_A_ (W)w);
		1278	}
		1279
		1280	#ifndef SA_RESTART
		1281	# define SA_RESTART 0
		1282	#endif
		1283
		1284	void
		1285	ev_signal_start (EV_P_ struct ev_signal *w)
		1286	{
		1287	#if EV_MULTIPLICITY
		1288	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1289	#endif
		1290	if (ev_is_active (w))
		1291	return;
		1292
884	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1293	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
885		1294
886	ev_start ((W)w, 1);	1295	ev_start (EV_A_ (W)w, 1);
887	array_needsize (signals, signalmax, w->signum, signals_init);	1296	array_needsize (signals, signalmax, w->signum, signals_init);
888	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1297	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
889		1298
890	if (!w->next)	1299	if (!((WL)w)->next)
891	{	1300	{
892	struct sigaction sa;	1301	struct sigaction sa;
893	sa.sa_handler = sighandler;	1302	sa.sa_handler = sighandler;
894	sigfillset (&sa.sa_mask);	1303	sigfillset (&sa.sa_mask);
895	sa.sa_flags = 0;	1304	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
896	sigaction (w->signum, &sa, 0);	1305	sigaction (w->signum, &sa, 0);
897	}	1306	}
898	}	1307	}
899		1308
900	void	1309	void
901	ev_signal_stop (struct ev_signal *w)	1310	ev_signal_stop (EV_P_ struct ev_signal *w)
902	{	1311	{
903	ev_clear_pending ((W)w);	1312	ev_clear_pending (EV_A_ (W)w);
904	if (!ev_is_active (w))	1313	if (!ev_is_active (w))
905	return;	1314	return;
906		1315
907	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1316	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
908	ev_stop ((W)w);	1317	ev_stop (EV_A_ (W)w);
909		1318
910	if (!signals [w->signum - 1].head)	1319	if (!signals [w->signum - 1].head)
911	signal (w->signum, SIG_DFL);	1320	signal (w->signum, SIG_DFL);
912	}	1321	}
913		1322
914	void	1323	void
915	ev_idle_start (struct ev_idle *w)	1324	ev_child_start (EV_P_ struct ev_child *w)
916	{	1325	{
		1326	#if EV_MULTIPLICITY
		1327	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1328	#endif
917	if (ev_is_active (w))	1329	if (ev_is_active (w))
918	return;	1330	return;
919		1331
920	ev_start ((W)w, ++idlecnt);	1332	ev_start (EV_A_ (W)w, 1);
921	array_needsize (idles, idlemax, idlecnt, );	1333	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
922	idles [idlecnt - 1] = w;
923	}	1334	}
924		1335
925	void	1336	void
926	ev_idle_stop (struct ev_idle *w)	1337	ev_child_stop (EV_P_ struct ev_child *w)
927	{	1338	{
928	ev_clear_pending ((W)w);	1339	ev_clear_pending (EV_A_ (W)w);
929	if (ev_is_active (w))	1340	if (ev_is_active (w))
930	return;	1341	return;
931		1342
932	idles [w->active - 1] = idles [--idlecnt];
933	ev_stop ((W)w);
934	}
935
936	void
937	ev_prepare_start (struct ev_prepare *w)
938	{
939	if (ev_is_active (w))
940	return;
941
942	ev_start ((W)w, ++preparecnt);
943	array_needsize (prepares, preparemax, preparecnt, );
944	prepares [preparecnt - 1] = w;
945	}
946
947	void
948	ev_prepare_stop (struct ev_prepare *w)
949	{
950	ev_clear_pending ((W)w);
951	if (ev_is_active (w))
952	return;
953
954	prepares [w->active - 1] = prepares [--preparecnt];
955	ev_stop ((W)w);
956	}
957
958	void
959	ev_check_start (struct ev_check *w)
960	{
961	if (ev_is_active (w))
962	return;
963
964	ev_start ((W)w, ++checkcnt);
965	array_needsize (checks, checkmax, checkcnt, );
966	checks [checkcnt - 1] = w;
967	}
968
969	void
970	ev_check_stop (struct ev_check *w)
971	{
972	ev_clear_pending ((W)w);
973	if (ev_is_active (w))
974	return;
975
976	checks [w->active - 1] = checks [--checkcnt];
977	ev_stop ((W)w);
978	}
979
980	void
981	ev_child_start (struct ev_child *w)
982	{
983	if (ev_is_active (w))
984	return;
985
986	ev_start ((W)w, 1);
987	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
988	}
989
990	void
991	ev_child_stop (struct ev_child *w)
992	{
993	ev_clear_pending ((W)w);
994	if (ev_is_active (w))
995	return;
996
997	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1343	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
998	ev_stop ((W)w);	1344	ev_stop (EV_A_ (W)w);
999	}	1345	}
1000		1346
1001	/*****************************************************************************/	1347	/*****************************************************************************/
1002		1348
1003	struct ev_once	1349	struct ev_once
…		…
1007	void (*cb)(int revents, void *arg);	1353	void (*cb)(int revents, void *arg);
1008	void *arg;	1354	void *arg;
1009	};	1355	};
1010		1356
1011	static void	1357	static void
1012	once_cb (struct ev_once *once, int revents)	1358	once_cb (EV_P_ struct ev_once *once, int revents)
1013	{	1359	{
1014	void (*cb)(int revents, void *arg) = once->cb;	1360	void (*cb)(int revents, void *arg) = once->cb;
1015	void *arg = once->arg;	1361	void *arg = once->arg;
1016		1362
1017	ev_io_stop (&once->io);	1363	ev_io_stop (EV_A_ &once->io);
1018	ev_timer_stop (&once->to);	1364	ev_timer_stop (EV_A_ &once->to);
1019	free (once);	1365	free (once);
1020		1366
1021	cb (revents, arg);	1367	cb (revents, arg);
1022	}	1368	}
1023		1369
1024	static void	1370	static void
1025	once_cb_io (struct ev_io *w, int revents)	1371	once_cb_io (EV_P_ struct ev_io *w, int revents)
1026	{	1372	{
1027	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1373	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1028	}	1374	}
1029		1375
1030	static void	1376	static void
1031	once_cb_to (struct ev_timer *w, int revents)	1377	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1032	{	1378	{
1033	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1379	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1034	}	1380	}
1035		1381
1036	void	1382	void
1037	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1383	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1038	{	1384	{
1039	struct ev_once *once = malloc (sizeof (struct ev_once));	1385	struct ev_once *once = malloc (sizeof (struct ev_once));
1040		1386
1041	if (!once)	1387	if (!once)
1042	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1388	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1047		1393
1048	ev_watcher_init (&once->io, once_cb_io);	1394	ev_watcher_init (&once->io, once_cb_io);
1049	if (fd >= 0)	1395	if (fd >= 0)
1050	{	1396	{
1051	ev_io_set (&once->io, fd, events);	1397	ev_io_set (&once->io, fd, events);
1052	ev_io_start (&once->io);	1398	ev_io_start (EV_A_ &once->io);
1053	}	1399	}
1054		1400
1055	ev_watcher_init (&once->to, once_cb_to);	1401	ev_watcher_init (&once->to, once_cb_to);
1056	if (timeout >= 0.)	1402	if (timeout >= 0.)
1057	{	1403	{
1058	ev_timer_set (&once->to, timeout, 0.);	1404	ev_timer_set (&once->to, timeout, 0.);
1059	ev_timer_start (&once->to);	1405	ev_timer_start (EV_A_ &once->to);
1060	}	1406	}
1061	}	1407	}
1062	}	1408	}
1063		1409
1064	/*****************************************************************************/
1065
1066	#if 0
1067
1068	struct ev_io wio;
1069
1070	static void
1071	sin_cb (struct ev_io *w, int revents)
1072	{
1073	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1074	}
1075
1076	static void
1077	ocb (struct ev_timer *w, int revents)
1078	{
1079	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1080	ev_timer_stop (w);
1081	ev_timer_start (w);
1082	}
1083
1084	static void
1085	scb (struct ev_signal *w, int revents)
1086	{
1087	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1088	ev_io_stop (&wio);
1089	ev_io_start (&wio);
1090	}
1091
1092	static void
1093	gcb (struct ev_signal *w, int revents)
1094	{
1095	fprintf (stderr, "generic %x\n", revents);
1096
1097	}
1098
1099	int main (void)
1100	{
1101	ev_init (0);
1102
1103	ev_io_init (&wio, sin_cb, 0, EV_READ);
1104	ev_io_start (&wio);
1105
1106	struct ev_timer t[10000];
1107
1108	#if 0
1109	int i;
1110	for (i = 0; i < 10000; ++i)
1111	{
1112	struct ev_timer *w = t + i;
1113	ev_watcher_init (w, ocb, i);
1114	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1115	ev_timer_start (w);
1116	if (drand48 () < 0.5)
1117	ev_timer_stop (w);
1118	}
1119	#endif
1120
1121	struct ev_timer t1;
1122	ev_timer_init (&t1, ocb, 5, 10);
1123	ev_timer_start (&t1);
1124
1125	struct ev_signal sig;
1126	ev_signal_init (&sig, scb, SIGQUIT);
1127	ev_signal_start (&sig);
1128
1129	struct ev_check cw;
1130	ev_check_init (&cw, gcb);
1131	ev_check_start (&cw);
1132
1133	struct ev_idle iw;
1134	ev_idle_init (&iw, gcb);
1135	ev_idle_start (&iw);
1136
1137	ev_loop (0);
1138
1139	return 0;
1140	}
1141
1142	#endif
1143
1144
1145
1146

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