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Comparing libev/ev.c (file contents):
Revision 1.31 by root, Thu Nov 1 09:05:33 2007 UTC vs.
Revision 1.56 by root, Sun Nov 4 15:58:49 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"
31	#endif	33	#endif
32		34
33	#include <math.h>	35	#include <math.h>
34	#include <stdlib.h>	36	#include <stdlib.h>
…		…
40	#include <stdio.h>	42	#include <stdio.h>
41		43
42	#include <assert.h>	44	#include <assert.h>
43	#include <errno.h>	45	#include <errno.h>
44	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
45	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
46	#include <sys/time.h>	50	#include <sys/time.h>
47	#include <time.h>	51	#include <time.h>
48		52
		53	/**/
		54
49	#ifndef EV_USE_MONOTONIC	55	#ifndef EV_USE_MONOTONIC
50	# ifdef CLOCK_MONOTONIC
51	# define EV_USE_MONOTONIC 1	56	# define EV_USE_MONOTONIC 1
52	# endif
53	#endif	57	#endif
54		58
55	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
56	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
57	#endif	61	#endif
58		62
		63	#ifndef EV_USEV_POLL
		64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
		65	#endif
		66
59	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
60	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
61	#endif	69	#endif
62		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
		73	#endif
		74
		75	#ifndef EV_USE_REALTIME
		76	# define EV_USE_REALTIME 1
		77	#endif
		78
		79	/**/
		80
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
63	#ifndef CLOCK_REALTIME	86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
64	# define EV_USE_REALTIME 0	88	# define EV_USE_REALTIME 0
65	#endif	89	#endif
66	#ifndef EV_USE_REALTIME	90
67	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	91	/**/
68	#endif
69		92
70	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	93	#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) */	94	#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 */	95	#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 */	96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
74		97
75	#include "ev.h"	98	#include "ev.h"
		99
		100	#if __GNUC__ >= 3
		101	# define expect(expr,value) __builtin_expect ((expr),(value))
		102	# define inline inline
		103	#else
		104	# define expect(expr,value) (expr)
		105	# define inline static
		106	#endif
		107
		108	#define expect_false(expr) expect ((expr) != 0, 0)
		109	#define expect_true(expr) expect ((expr) != 0, 1)
		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
76		113
77	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
78	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
79	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
80		117
81	static ev_tstamp now, diff; /* monotonic clock */	118	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		119
91	/*****************************************************************************/	120	/*****************************************************************************/
92		121
93	ev_tstamp	122	typedef struct
		123	{
		124	struct ev_watcher_list *head;
		125	unsigned char events;
		126	unsigned char reify;
		127	} ANFD;
		128
		129	typedef struct
		130	{
		131	W w;
		132	int events;
		133	} ANPENDING;
		134
		135	#if EV_MULTIPLICITY
		136
		137	struct ev_loop
		138	{
		139	# define VAR(name,decl) decl;
		140	# include "ev_vars.h"
		141	};
		142	# undef VAR
		143	# include "ev_wrap.h"
		144
		145	#else
		146
		147	# define VAR(name,decl) static decl;
		148	# include "ev_vars.h"
		149	# undef VAR
		150
		151	#endif
		152
		153	/*****************************************************************************/
		154
		155	inline ev_tstamp
94	ev_time (void)	156	ev_time (void)
95	{	157	{
96	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
97	struct timespec ts;	159	struct timespec ts;
98	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
102	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
103	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
104	#endif	166	#endif
105	}	167	}
106		168
107	static ev_tstamp	169	inline ev_tstamp
108	get_clock (void)	170	get_clock (void)
109	{	171	{
110	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
111	if (have_monotonic)	173	if (expect_true (have_monotonic))
112	{	174	{
113	struct timespec ts;	175	struct timespec ts;
114	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
115	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
116	}	178	}
117	#endif	179	#endif
118		180
119	return ev_time ();	181	return ev_time ();
120	}	182	}
121		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
122	#define array_roundsize(base,n) ((n) | 4 & ~3)	190	#define array_roundsize(base,n) ((n) | 4 & ~3)
123		191
124	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
125	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
126	{ \	194	{ \
127	int newcnt = cur; \	195	int newcnt = cur; \
128	do \	196	do \
129	{ \	197	{ \
130	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
136	cur = newcnt; \	204	cur = newcnt; \
137	}	205	}
138		206
139	/*****************************************************************************/	207	/*****************************************************************************/
140		208
141	typedef struct
142	{
143	struct ev_io *head;
144	int events;
145	} ANFD;
146
147	static ANFD *anfds;
148	static int anfdmax;
149
150	static void	209	static void
151	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
152	{	211	{
153	while (count--)	212	while (count--)
154	{	213	{
155	base->head = 0;	214	base->head = 0;
156	base->events = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
157	++base;	218	++base;
158	}	219	}
159	}	220	}
160		221
161	typedef struct
162	{
163	W w;
164	int events;
165	} ANPENDING;
166
167	static ANPENDING *pendings;
168	static int pendingmax, pendingcnt;
169
170	static void	222	static void
171	event (W w, int events)	223	event (EV_P_ W w, int events)
172	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
		229	}
		230
173	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
174	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
175	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
176	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
177	}	235	}
178		236
179	static void	237	static void
180	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
181	{	239	{
182	int i;	240	int i;
183		241
184	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
185	event (events [i], type);	243	event (EV_A_ events [i], type);
186	}	244	}
187		245
188	static void	246	static void
189	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
190	{	248	{
191	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
192	struct ev_io *w;	250	struct ev_io *w;
193		251
194	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
195	{	253	{
196	int ev = w->events & events;	254	int ev = w->events & events;
197		255
198	if (ev)	256	if (ev)
199	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
200	}	258	}
201	}	259	}
202		260
203	/*****************************************************************************/	261	/*****************************************************************************/
204		262
205	static int *fdchanges;
206	static int fdchangemax, fdchangecnt;
207
208	static void	263	static void
209	fd_reify (void)	264	fd_reify (EV_P)
210	{	265	{
211	int i;	266	int i;
212		267
213	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
214	{	269	{
…		…
216	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
217	struct ev_io *w;	272	struct ev_io *w;
218		273
219	int events = 0;	274	int events = 0;
220		275
221	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
222	events |= w->events;	277	events |= w->events;
223		278
224	anfd->events &= ~EV_REIFY;	279	anfd->reify = 0;
225		280
226	if (anfd->events != events)	281	if (anfd->events != events)
227	{	282	{
228	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
229	anfd->events = events;	284	anfd->events = events;
230	}	285	}
231	}	286	}
232		287
233	fdchangecnt = 0;	288	fdchangecnt = 0;
234	}	289	}
235		290
236	static void	291	static void
237	fd_change (int fd)	292	fd_change (EV_P_ int fd)
238	{	293	{
239	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	294	if (anfds [fd].reify || fdchangecnt < 0)
240	return;	295	return;
241		296
242	anfds [fd].events |= EV_REIFY;	297	anfds [fd].reify = 1;
243		298
244	++fdchangecnt;	299	++fdchangecnt;
245	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
246	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
247	}	302	}
248		303
		304	static void
		305	fd_kill (EV_P_ int fd)
		306	{
		307	struct ev_io *w;
		308
		309	while ((w = (struct ev_io *)anfds [fd].head))
		310	{
		311	ev_io_stop (EV_A_ w);
		312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
		313	}
		314	}
		315
249	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
250	static void	317	static void
251	fd_recheck (void)	318	fd_ebadf (EV_P)
252	{	319	{
253	int fd;	320	int fd;
254		321
255	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
256	if (anfds [fd].events)	323	if (anfds [fd].events)
257	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
258	while (anfds [fd].head)	325	fd_kill (EV_A_ fd);
		326	}
		327
		328	/* called on ENOMEM in select/poll to kill some fds and retry */
		329	static void
		330	fd_enomem (EV_P)
		331	{
		332	int fd = anfdmax;
		333
		334	while (fd--)
		335	if (anfds [fd].events)
259	{	336	{
260	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	337	close (fd);
261	ev_io_stop (anfds [fd].head);	338	fd_kill (EV_A_ fd);
		339	return;
262	}	340	}
		341	}
		342
		343	/* susually called after fork if method needs to re-arm all fds from scratch */
		344	static void
		345	fd_rearm_all (EV_P)
		346	{
		347	int fd;
		348
		349	/* this should be highly optimised to not do anything but set a flag */
		350	for (fd = 0; fd < anfdmax; ++fd)
		351	if (anfds [fd].events)
		352	{
		353	anfds [fd].events = 0;
		354	fd_change (fd);
		355	}
263	}	356	}
264		357
265	/*****************************************************************************/	358	/*****************************************************************************/
266		359
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	360	static void
274	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
275	{	362	{
276	WT w = timers [k];	363	WT w = heap [k];
277		364
278	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
279	{	366	{
280	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
281	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
282	k >>= 1;	369	k >>= 1;
283	}	370	}
284		371
285	timers [k] = w;	372	heap [k] = w;
286	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
287		374
288	}	375	}
289		376
290	static void	377	static void
291	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
292	{	379	{
293	WT w = timers [k];	380	WT w = heap [k];
294		381
295	while (k < (N >> 1))	382	while (k < (N >> 1))
296	{	383	{
297	int j = k << 1;	384	int j = k << 1;
298		385
299	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
300	++j;	387	++j;
301		388
302	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
303	break;	390	break;
304		391
305	timers [k] = timers [j];	392	heap [k] = heap [j];
306	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
307	k = j;	394	k = j;
308	}	395	}
309		396
310	timers [k] = w;	397	heap [k] = w;
311	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
312	}	399	}
313		400
314	/*****************************************************************************/	401	/*****************************************************************************/
315		402
316	typedef struct	403	typedef struct
317	{	404	{
318	struct ev_signal *head;	405	struct ev_watcher_list *head;
319	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
320	} ANSIG;	407	} ANSIG;
321		408
322	static ANSIG *signals;	409	static ANSIG *signals;
323	static int signalmax;	410	static int signalmax;
324		411
325	static int sigpipe [2];	412	static int sigpipe [2];
326	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
327	static struct ev_io sigev;
328		414
329	static void	415	static void
330	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
331	{	417	{
332	while (count--)	418	while (count--)
333	{	419	{
334	base->head = 0;	420	base->head = 0;
335	base->gotsig = 0;	421	base->gotsig = 0;
		422
336	++base;	423	++base;
337	}	424	}
338	}	425	}
339		426
340	static void	427	static void
…		…
342	{	429	{
343	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
344		431
345	if (!gotsig)	432	if (!gotsig)
346	{	433	{
		434	int old_errno = errno;
347	gotsig = 1;	435	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
349	}	438	}
350	}	439	}
351		440
352	static void	441	static void
353	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	443	{
355	struct ev_signal *w;	444	struct ev_watcher_list *w;
356	int sig;	445	int signum;
357		446
		447	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	448	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		449
361	for (sig = signalmax; sig--; )	450	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	451	if (signals [signum].gotsig)
363	{	452	{
364	signals [sig].gotsig = 0;	453	signals [signum].gotsig = 0;
365		454
366	for (w = signals [sig].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
368	}	457	}
369	}	458	}
370		459
371	static void	460	static void
372	siginit (void)	461	siginit (EV_P)
373	{	462	{
		463	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		466
377	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
380		471
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	475	}
384		476
385	/*****************************************************************************/	477	/*****************************************************************************/
386		478
387	static struct ev_idle **idles;	479	#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
398	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;
400		480
401	#ifndef WCONTINUED	481	#ifndef WCONTINUED
402	# define WCONTINUED 0	482	# define WCONTINUED 0
403	#endif	483	#endif
404		484
405	static void	485	static void
406	childcb (struct ev_signal *sw, int revents)	486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	487	{
408	struct ev_child *w;	488	struct ev_child *w;
		489
		490	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		491	if (w->pid == pid || !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it *now* */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
409	int pid, status;	503	int pid, status;
410		504
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	505	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	506	{
413	if (w->pid == pid || w->pid == -1)	507	/* make sure we are called again until all childs have been reaped */
414	{	508	event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	509
416	event ((W)w, EV_CHILD);	510	child_reap (EV_A_ sw, pid, pid, status);
417	}	511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
418	}	513	}
		514
		515	#endif
419		516
420	/*****************************************************************************/	517	/*****************************************************************************/
421		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
422	#if EV_USE_EPOLL	522	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	523	# include "ev_epoll.c"
424	#endif	524	#endif
		525	#if EV_USEV_POLL
		526	# include "ev_poll.c"
		527	#endif
425	#if EV_USE_SELECT	528	#if EV_USE_SELECT
426	# include "ev_select.c"	529	# include "ev_select.c"
427	#endif	530	#endif
428		531
429	int	532	int
…		…
436	ev_version_minor (void)	539	ev_version_minor (void)
437	{	540	{
438	return EV_VERSION_MINOR;	541	return EV_VERSION_MINOR;
439	}	542	}
440		543
441	int ev_init (int flags)	544	/* return true if we are running with elevated privileges and should ignore env variables */
		545	static int
		546	enable_secure (void)
442	{	547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
		551	return getuid () != geteuid ()
		552	|| getgid () != getegid ();
		553	#endif
		554	}
		555
		556	int
		557	ev_method (EV_P)
		558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
443	if (!ev_method)	565	if (!method)
444	{	566	{
445	#if EV_USE_MONOTONIC	567	#if EV_USE_MONOTONIC
446	{	568	{
447	struct timespec ts;	569	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	571	have_monotonic = 1;
450	}	572	}
451	#endif	573	#endif
452		574
453	ev_now = ev_time ();	575	rt_now = ev_time ();
454	now = get_clock ();	576	mn_now = get_clock ();
		577	now_floor = mn_now;
455	diff = ev_now - now;	578	rtmn_diff = rt_now - mn_now;
456		579
457	if (pipe (sigpipe))	580	if (methods == EVMETHOD_AUTO)
458	return 0;	581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		582	methods = atoi (getenv ("LIBEV_METHODS"));
		583	else
460	ev_method = EVMETHOD_NONE;	584	methods = EVMETHOD_ANY;
		585
		586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
461	#if EV_USE_EPOLL	590	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		592	#endif
		593	#if EV_USEV_POLL
		594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
463	#endif	595	#endif
464	#if EV_USE_SELECT	596	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	598	#endif
		599	}
		600	}
467		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/*TODO*/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/*TODO*/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
		676	if (pipe (sigpipe))
		677	return 0;
		678
		679	if (!default_loop)
		680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
468	if (ev_method)	689	if (ev_method (EV_A))
469	{	690	{
470	ev_watcher_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
471	siginit ();	693	siginit (EV_A);
472		694
		695	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	696	ev_signal_init (&childev, childcb, SIGCHLD);
		697	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	698	ev_signal_start (EV_A_ &childev);
		699	ev_unref (EV_A); /* child watcher should not keep loop alive */
		700	#endif
475	}	701	}
		702	else
		703	default_loop = 0;
476	}	704	}
477		705
478	return ev_method;	706	return default_loop;
479	}	707	}
480		708
481	/*****************************************************************************/
482
483	void	709	void
484	ev_prefork (void)	710	ev_default_destroy (void)
485	{	711	{
486	/* nop */	712	struct ev_loop *loop = default_loop;
487	}
488		713
489	void	714	ev_ref (EV_A); /* child watcher */
490	ev_postfork_parent (void)	715	ev_signal_stop (EV_A_ &childev);
491	{
492	/* nop */
493	}
494		716
495	void	717	ev_ref (EV_A); /* signal watcher */
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif
502
503	ev_io_stop (&sigev);	718	ev_io_stop (EV_A_ &sigev);
		719
		720	close (sigpipe [0]); sigpipe [0] = 0;
		721	close (sigpipe [1]); sigpipe [1] = 0;
		722
		723	loop_destroy (EV_A);
		724	}
		725
		726	void
		727	ev_default_fork (EV_P)
		728	{
		729	loop_fork (EV_A);
		730
		731	ev_io_stop (EV_A_ &sigev);
504	close (sigpipe [0]);	732	close (sigpipe [0]);
505	close (sigpipe [1]);	733	close (sigpipe [1]);
506	pipe (sigpipe);	734	pipe (sigpipe);
		735
		736	ev_ref (EV_A); /* signal watcher */
507	siginit ();	737	siginit (EV_A);
508	}	738	}
509		739
510	/*****************************************************************************/	740	/*****************************************************************************/
511		741
512	static void	742	static void
513	call_pending (void)	743	call_pending (EV_P)
514	{	744	{
		745	int pri;
		746
		747	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	748	while (pendingcnt [pri])
516	{	749	{
517	ANPENDING *p = pendings + --pendingcnt;	750	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		751
519	if (p->w)	752	if (p->w)
520	{	753	{
521	p->w->pending = 0;	754	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	755	p->w->cb (EV_A_ p->w, p->events);
523	}	756	}
524	}	757	}
525	}	758	}
526		759
527	static void	760	static void
528	timers_reify (void)	761	timers_reify (EV_P)
529	{	762	{
530	while (timercnt && timers [0]->at <= now)	763	while (timercnt && timers [0]->at <= mn_now)
531	{	764	{
532	struct ev_timer *w = timers [0];	765	struct ev_timer *w = timers [0];
533		766
534	/* first reschedule or stop timer */	767	/* first reschedule or stop timer */
535	if (w->repeat)	768	if (w->repeat)
536	{	769	{
		770	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
537	w->at = now + w->repeat;	771	w->at = mn_now + w->repeat;
538	assert (("timer timeout in the past, negative repeat?", w->at > now));
539	downheap ((WT *)timers, timercnt, 0);	772	downheap ((WT *)timers, timercnt, 0);
540	}	773	}
541	else	774	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	775	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		776
544	event ((W)w, EV_TIMEOUT);	777	event (EV_A_ (W)w, EV_TIMEOUT);
545	}	778	}
546	}	779	}
547		780
548	static void	781	static void
549	periodics_reify (void)	782	periodics_reify (EV_P)
550	{	783	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	784	while (periodiccnt && periodics [0]->at <= rt_now)
552	{	785	{
553	struct ev_periodic *w = periodics [0];	786	struct ev_periodic *w = periodics [0];
554		787
555	/* first reschedule or stop timer */	788	/* first reschedule or stop timer */
556	if (w->interval)	789	if (w->interval)
557	{	790	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	791	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));	792	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	793	downheap ((WT *)periodics, periodiccnt, 0);
561	}	794	}
562	else	795	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	796	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		797
565	event ((W)w, EV_TIMEOUT);	798	event (EV_A_ (W)w, EV_PERIODIC);
566	}	799	}
567	}	800	}
568		801
569	static void	802	static void
570	periodics_reschedule (ev_tstamp diff)	803	periodics_reschedule (EV_P)
571	{	804	{
572	int i;	805	int i;
573		806
574	/* adjust periodics after time jump */	807	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	808	for (i = 0; i < periodiccnt; ++i)
576	{	809	{
577	struct ev_periodic *w = periodics [i];	810	struct ev_periodic *w = periodics [i];
578		811
579	if (w->interval)	812	if (w->interval)
580	{	813	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	814	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
582		815
583	if (fabs (diff) >= 1e-4)	816	if (fabs (diff) >= 1e-4)
584	{	817	{
585	ev_periodic_stop (w);	818	ev_periodic_stop (EV_A_ w);
586	ev_periodic_start (w);	819	ev_periodic_start (EV_A_ w);
587		820
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	821	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	822	}
590	}	823	}
591	}	824	}
592	}	825	}
593		826
		827	inline int
		828	time_update_monotonic (EV_P)
		829	{
		830	mn_now = get_clock ();
		831
		832	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		833	{
		834	rt_now = rtmn_diff + mn_now;
		835	return 0;
		836	}
		837	else
		838	{
		839	now_floor = mn_now;
		840	rt_now = ev_time ();
		841	return 1;
		842	}
		843	}
		844
594	static void	845	static void
595	time_update (void)	846	time_update (EV_P)
596	{	847	{
597	int i;	848	int i;
598		849
599	ev_now = ev_time ();	850	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	851	if (expect_true (have_monotonic))
602	{	852	{
603	ev_tstamp odiff = diff;	853	if (time_update_monotonic (EV_A))
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	854	{
607	now = get_clock ();	855	ev_tstamp odiff = rtmn_diff;
		856
		857	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		858	{
608	diff = ev_now - now;	859	rtmn_diff = rt_now - mn_now;
609		860
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	861	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	862	return; /* all is well */
612		863
613	ev_now = ev_time ();	864	rt_now = ev_time ();
		865	mn_now = get_clock ();
		866	now_floor = mn_now;
		867	}
		868
		869	periodics_reschedule (EV_A);
		870	/* no timer adjustment, as the monotonic clock doesn't jump */
		871	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
614	}	872	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}	873	}
619	else	874	else
		875	#endif
620	{	876	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	877	rt_now = ev_time ();
		878
		879	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
622	{	880	{
623	periodics_reschedule (ev_now - now);	881	periodics_reschedule (EV_A);
624		882
625	/* adjust timers. this is easy, as the offset is the same for all */	883	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	884	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	885	timers [i]->at += rt_now - mn_now;
628	}	886	}
629		887
630	now = ev_now;	888	mn_now = rt_now;
631	}	889	}
632	}	890	}
633		891
634	int ev_loop_done;	892	void
		893	ev_ref (EV_P)
		894	{
		895	++activecnt;
		896	}
635		897
		898	void
		899	ev_unref (EV_P)
		900	{
		901	--activecnt;
		902	}
		903
		904	static int loop_done;
		905
		906	void
636	void ev_loop (int flags)	907	ev_loop (EV_P_ int flags)
637	{	908	{
638	double block;	909	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	910	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640		911
641	do	912	do
642	{	913	{
643	/* queue check watchers (and execute them) */	914	/* queue check watchers (and execute them) */
644	if (preparecnt)	915	if (expect_false (preparecnt))
645	{	916	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	917	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	918	call_pending (EV_A);
648	}	919	}
649		920
650	/* update fd-related kernel structures */	921	/* update fd-related kernel structures */
651	fd_reify ();	922	fd_reify (EV_A);
652		923
653	/* calculate blocking time */	924	/* calculate blocking time */
654		925
655	/* we only need this for !monotonic clockor timers, but as we basically	926	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */	927	always have timers, we just calculate it always */
		928	#if EV_USE_MONOTONIC
		929	if (expect_true (have_monotonic))
		930	time_update_monotonic (EV_A);
		931	else
		932	#endif
		933	{
657	ev_now = ev_time ();	934	rt_now = ev_time ();
		935	mn_now = rt_now;
		936	}
658		937
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	938	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	939	block = 0.;
661	else	940	else
662	{	941	{
663	block = MAX_BLOCKTIME;	942	block = MAX_BLOCKTIME;
664		943
665	if (timercnt)	944	if (timercnt)
666	{	945	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	946	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
668	if (block > to) block = to;	947	if (block > to) block = to;
669	}	948	}
670		949
671	if (periodiccnt)	950	if (periodiccnt)
672	{	951	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	952	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
674	if (block > to) block = to;	953	if (block > to) block = to;
675	}	954	}
676		955
677	if (block < 0.) block = 0.;	956	if (block < 0.) block = 0.;
678	}	957	}
679		958
680	method_poll (block);	959	method_poll (EV_A_ block);
681		960
682	/* update ev_now, do magic */	961	/* update rt_now, do magic */
683	time_update ();	962	time_update (EV_A);
684		963
685	/* queue pending timers and reschedule them */	964	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	965	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	966	periodics_reify (EV_A); /* absolute timers called first */
688		967
689	/* queue idle watchers unless io or timers are pending */	968	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	969	if (!pendingcnt)
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	970	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		971
693	/* queue check watchers, to be executed first */	972	/* queue check watchers, to be executed first */
694	if (checkcnt)	973	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	974	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		975
697	call_pending ();	976	call_pending (EV_A);
698	}	977	}
699	while (!ev_loop_done);	978	while (activecnt && !loop_done);
700		979
701	if (ev_loop_done != 2)	980	if (loop_done != 2)
702	ev_loop_done = 0;	981	loop_done = 0;
		982	}
		983
		984	void
		985	ev_unloop (EV_P_ int how)
		986	{
		987	loop_done = how;
703	}	988	}
704		989
705	/*****************************************************************************/	990	/*****************************************************************************/
706		991
707	static void	992	inline void
708	wlist_add (WL *head, WL elem)	993	wlist_add (WL *head, WL elem)
709	{	994	{
710	elem->next = *head;	995	elem->next = *head;
711	*head = elem;	996	*head = elem;
712	}	997	}
713		998
714	static void	999	inline void
715	wlist_del (WL *head, WL elem)	1000	wlist_del (WL *head, WL elem)
716	{	1001	{
717	while (*head)	1002	while (*head)
718	{	1003	{
719	if (*head == elem)	1004	if (*head == elem)
…		…
724		1009
725	head = &(*head)->next;	1010	head = &(*head)->next;
726	}	1011	}
727	}	1012	}
728		1013
729	static void	1014	inline void
730	ev_clear (W w)	1015	ev_clear_pending (EV_P_ W w)
731	{	1016	{
732	if (w->pending)	1017	if (w->pending)
733	{	1018	{
734	pendings [w->pending - 1].w = 0;	1019	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1020	w->pending = 0;
736	}	1021	}
737	}	1022	}
738		1023
739	static void	1024	inline void
740	ev_start (W w, int active)	1025	ev_start (EV_P_ W w, int active)
741	{	1026	{
		1027	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1028	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1029
742	w->active = active;	1030	w->active = active;
		1031	ev_ref (EV_A);
743	}	1032	}
744		1033
745	static void	1034	inline void
746	ev_stop (W w)	1035	ev_stop (EV_P_ W w)
747	{	1036	{
		1037	ev_unref (EV_A);
748	w->active = 0;	1038	w->active = 0;
749	}	1039	}
750		1040
751	/*****************************************************************************/	1041	/*****************************************************************************/
752		1042
753	void	1043	void
754	ev_io_start (struct ev_io *w)	1044	ev_io_start (EV_P_ struct ev_io *w)
755	{	1045	{
		1046	int fd = w->fd;
		1047
756	if (ev_is_active (w))	1048	if (ev_is_active (w))
757	return;	1049	return;
758		1050
759	int fd = w->fd;	1051	assert (("ev_io_start called with negative fd", fd >= 0));
760		1052
761	ev_start ((W)w, 1);	1053	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1054	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1055	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1056
765	fd_change (fd);	1057	fd_change (EV_A_ fd);
766	}	1058	}
767		1059
768	void	1060	void
769	ev_io_stop (struct ev_io *w)	1061	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1062	{
771	ev_clear ((W)w);	1063	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
773	return;	1065	return;
774		1066
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1067	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1068	ev_stop (EV_A_ (W)w);
777		1069
778	fd_change (w->fd);	1070	fd_change (EV_A_ w->fd);
779	}	1071	}
780		1072
781	void	1073	void
782	ev_timer_start (struct ev_timer *w)	1074	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1075	{
784	if (ev_is_active (w))	1076	if (ev_is_active (w))
785	return;	1077	return;
786		1078
787	w->at += now;	1079	w->at += mn_now;
788		1080
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1081	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1082
791	ev_start ((W)w, ++timercnt);	1083	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1084	array_needsize (timers, timermax, timercnt, );
793	timers [timercnt - 1] = w;	1085	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1086	upheap ((WT *)timers, timercnt - 1);
795	}	1087	}
796		1088
797	void	1089	void
798	ev_timer_stop (struct ev_timer *w)	1090	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1091	{
800	ev_clear ((W)w);	1092	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1093	if (!ev_is_active (w))
802	return;	1094	return;
803		1095
804	if (w->active < timercnt--)	1096	if (w->active < timercnt--)
805	{	1097	{
…		…
807	downheap ((WT *)timers, timercnt, w->active - 1);	1099	downheap ((WT *)timers, timercnt, w->active - 1);
808	}	1100	}
809		1101
810	w->at = w->repeat;	1102	w->at = w->repeat;
811		1103
812	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
813	}	1105	}
814		1106
815	void	1107	void
816	ev_timer_again (struct ev_timer *w)	1108	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1109	{
818	if (ev_is_active (w))	1110	if (ev_is_active (w))
819	{	1111	{
820	if (w->repeat)	1112	if (w->repeat)
821	{	1113	{
822	w->at = now + w->repeat;	1114	w->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1115	downheap ((WT *)timers, timercnt, w->active - 1);
824	}	1116	}
825	else	1117	else
826	ev_timer_stop (w);	1118	ev_timer_stop (EV_A_ w);
827	}	1119	}
828	else if (w->repeat)	1120	else if (w->repeat)
829	ev_timer_start (w);	1121	ev_timer_start (EV_A_ w);
830	}	1122	}
831		1123
832	void	1124	void
833	ev_periodic_start (struct ev_periodic *w)	1125	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1126	{
835	if (ev_is_active (w))	1127	if (ev_is_active (w))
836	return;	1128	return;
837		1129
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1130	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
839		1131
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1132	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)	1133	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1134	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
843		1135
844	ev_start ((W)w, ++periodiccnt);	1136	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1137	array_needsize (periodics, periodicmax, periodiccnt, );
846	periodics [periodiccnt - 1] = w;	1138	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1139	upheap ((WT *)periodics, periodiccnt - 1);
848	}	1140	}
849		1141
850	void	1142	void
851	ev_periodic_stop (struct ev_periodic *w)	1143	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1144	{
853	ev_clear ((W)w);	1145	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1146	if (!ev_is_active (w))
855	return;	1147	return;
856		1148
857	if (w->active < periodiccnt--)	1149	if (w->active < periodiccnt--)
858	{	1150	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1151	periodics [w->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1152	downheap ((WT *)periodics, periodiccnt, w->active - 1);
861	}	1153	}
862		1154
863	ev_stop ((W)w);	1155	ev_stop (EV_A_ (W)w);
864	}	1156	}
865		1157
866	void	1158	void
867	ev_signal_start (struct ev_signal *w)	1159	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1160	{
869	if (ev_is_active (w))	1161	if (ev_is_active (w))
870	return;	1162	return;
871		1163
		1164	ev_start (EV_A_ (W)w, ++idlecnt);
		1165	array_needsize (idles, idlemax, idlecnt, );
		1166	idles [idlecnt - 1] = w;
		1167	}
		1168
		1169	void
		1170	ev_idle_stop (EV_P_ struct ev_idle *w)
		1171	{
		1172	ev_clear_pending (EV_A_ (W)w);
		1173	if (ev_is_active (w))
		1174	return;
		1175
		1176	idles [w->active - 1] = idles [--idlecnt];
		1177	ev_stop (EV_A_ (W)w);
		1178	}
		1179
		1180	void
		1181	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1182	{
		1183	if (ev_is_active (w))
		1184	return;
		1185
		1186	ev_start (EV_A_ (W)w, ++preparecnt);
		1187	array_needsize (prepares, preparemax, preparecnt, );
		1188	prepares [preparecnt - 1] = w;
		1189	}
		1190
		1191	void
		1192	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1193	{
		1194	ev_clear_pending (EV_A_ (W)w);
		1195	if (ev_is_active (w))
		1196	return;
		1197
		1198	prepares [w->active - 1] = prepares [--preparecnt];
		1199	ev_stop (EV_A_ (W)w);
		1200	}
		1201
		1202	void
		1203	ev_check_start (EV_P_ struct ev_check *w)
		1204	{
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	ev_start (EV_A_ (W)w, ++checkcnt);
		1209	array_needsize (checks, checkmax, checkcnt, );
		1210	checks [checkcnt - 1] = w;
		1211	}
		1212
		1213	void
		1214	ev_check_stop (EV_P_ struct ev_check *w)
		1215	{
		1216	ev_clear_pending (EV_A_ (W)w);
		1217	if (ev_is_active (w))
		1218	return;
		1219
		1220	checks [w->active - 1] = checks [--checkcnt];
		1221	ev_stop (EV_A_ (W)w);
		1222	}
		1223
		1224	#ifndef SA_RESTART
		1225	# define SA_RESTART 0
		1226	#endif
		1227
		1228	void
		1229	ev_signal_start (EV_P_ struct ev_signal *w)
		1230	{
		1231	#if EV_MULTIPLICITY
		1232	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1233	#endif
		1234	if (ev_is_active (w))
		1235	return;
		1236
		1237	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1238
872	ev_start ((W)w, 1);	1239	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1240	array_needsize (signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1241	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1242
876	if (!w->next)	1243	if (!w->next)
877	{	1244	{
878	struct sigaction sa;	1245	struct sigaction sa;
879	sa.sa_handler = sighandler;	1246	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1247	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1248	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1249	sigaction (w->signum, &sa, 0);
883	}	1250	}
884	}	1251	}
885		1252
886	void	1253	void
887	ev_signal_stop (struct ev_signal *w)	1254	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1255	{
889	ev_clear ((W)w);	1256	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1257	if (!ev_is_active (w))
891	return;	1258	return;
892		1259
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1260	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1261	ev_stop (EV_A_ (W)w);
895		1262
896	if (!signals [w->signum - 1].head)	1263	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1264	signal (w->signum, SIG_DFL);
898	}	1265	}
899		1266
900	void	1267	void
901	ev_idle_start (struct ev_idle *w)	1268	ev_child_start (EV_P_ struct ev_child *w)
902	{	1269	{
		1270	#if EV_MULTIPLICITY
		1271	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1272	#endif
903	if (ev_is_active (w))	1273	if (ev_is_active (w))
904	return;	1274	return;
905		1275
906	ev_start ((W)w, ++idlecnt);	1276	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1277	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1278	}
910		1279
911	void	1280	void
912	ev_idle_stop (struct ev_idle *w)	1281	ev_child_stop (EV_P_ struct ev_child *w)
913	{	1282	{
914	ev_clear ((W)w);	1283	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1284	if (ev_is_active (w))
916	return;	1285	return;
917		1286
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);	1287	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1288	ev_stop (EV_A_ (W)w);
985	}	1289	}
986		1290
987	/*****************************************************************************/	1291	/*****************************************************************************/
988		1292
989	struct ev_once	1293	struct ev_once
…		…
993	void (*cb)(int revents, void *arg);	1297	void (*cb)(int revents, void *arg);
994	void *arg;	1298	void *arg;
995	};	1299	};
996		1300
997	static void	1301	static void
998	once_cb (struct ev_once *once, int revents)	1302	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1303	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1304	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1305	void *arg = once->arg;
1002		1306
1003	ev_io_stop (&once->io);	1307	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1308	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1309	free (once);
1006		1310
1007	cb (revents, arg);	1311	cb (revents, arg);
1008	}	1312	}
1009		1313
1010	static void	1314	static void
1011	once_cb_io (struct ev_io *w, int revents)	1315	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1316	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1317	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1318	}
1015		1319
1016	static void	1320	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1321	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1322	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1323	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1324	}
1021		1325
1022	void	1326	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1327	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1328	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1329	struct ev_once *once = malloc (sizeof (struct ev_once));
1026		1330
1027	if (!once)	1331	if (!once)
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1332	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1033		1337
1034	ev_watcher_init (&once->io, once_cb_io);	1338	ev_watcher_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1339	if (fd >= 0)
1036	{	1340	{
1037	ev_io_set (&once->io, fd, events);	1341	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1342	ev_io_start (EV_A_ &once->io);
1039	}	1343	}
1040		1344
1041	ev_watcher_init (&once->to, once_cb_to);	1345	ev_watcher_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1346	if (timeout >= 0.)
1043	{	1347	{
1044	ev_timer_set (&once->to, timeout, 0.);	1348	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1349	ev_timer_start (EV_A_ &once->to);
1046	}	1350	}
1047	}	1351	}
1048	}	1352	}
1049		1353
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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