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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 1.59 by root, Sun Nov 4 18:15:16 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_USE_POLL
		64	# define EV_USE_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;	414	static struct ev_io sigev;
328		415
329	static void	416	static void
330	signals_init (ANSIG *base, int count)	417	signals_init (ANSIG *base, int count)
331	{	418	{
332	while (count--)	419	while (count--)
333	{	420	{
334	base->head = 0;	421	base->head = 0;
335	base->gotsig = 0;	422	base->gotsig = 0;
		423
336	++base;	424	++base;
337	}	425	}
338	}	426	}
339		427
340	static void	428	static void
…		…
342	{	430	{
343	signals [signum - 1].gotsig = 1;	431	signals [signum - 1].gotsig = 1;
344		432
345	if (!gotsig)	433	if (!gotsig)
346	{	434	{
		435	int old_errno = errno;
347	gotsig = 1;	436	gotsig = 1;
348	write (sigpipe [1], &gotsig, 1);	437	write (sigpipe [1], &signum, 1);
		438	errno = old_errno;
349	}	439	}
350	}	440	}
351		441
352	static void	442	static void
353	sigcb (struct ev_io *iow, int revents)	443	sigcb (EV_P_ struct ev_io *iow, int revents)
354	{	444	{
355	struct ev_signal *w;	445	struct ev_watcher_list *w;
356	int sig;	446	int signum;
357		447
		448	read (sigpipe [0], &revents, 1);
358	gotsig = 0;	449	gotsig = 0;
359	read (sigpipe [0], &revents, 1);
360		450
361	for (sig = signalmax; sig--; )	451	for (signum = signalmax; signum--; )
362	if (signals [sig].gotsig)	452	if (signals [signum].gotsig)
363	{	453	{
364	signals [sig].gotsig = 0;	454	signals [signum].gotsig = 0;
365		455
366	for (w = signals [sig].head; w; w = w->next)	456	for (w = signals [signum].head; w; w = w->next)
367	event ((W)w, EV_SIGNAL);	457	event (EV_A_ (W)w, EV_SIGNAL);
368	}	458	}
369	}	459	}
370		460
371	static void	461	static void
372	siginit (void)	462	siginit (EV_P)
373	{	463	{
		464	#ifndef WIN32
374	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
375	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
376		467
377	/* rather than sort out wether we really need nb, set it */	468	/* rather than sort out wether we really need nb, set it */
378	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
379	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		471	#endif
380		472
381	ev_io_set (&sigev, sigpipe [0], EV_READ);	473	ev_io_set (&sigev, sigpipe [0], EV_READ);
382	ev_io_start (&sigev);	474	ev_io_start (EV_A_ &sigev);
		475	ev_unref (EV_A); /* child watcher should not keep loop alive */
383	}	476	}
384		477
385	/*****************************************************************************/	478	/*****************************************************************************/
386		479
387	static struct ev_idle **idles;	480	#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		481
398	static struct ev_child *childs [PID_HASHSIZE];	482	static struct ev_child *childs [PID_HASHSIZE];
399	static struct ev_signal childev;	483	static struct ev_signal childev;
400		484
401	#ifndef WCONTINUED	485	#ifndef WCONTINUED
402	# define WCONTINUED 0	486	# define WCONTINUED 0
403	#endif	487	#endif
404		488
405	static void	489	static void
406	childcb (struct ev_signal *sw, int revents)	490	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
407	{	491	{
408	struct ev_child *w;	492	struct ev_child *w;
		493
		494	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		495	if (w->pid == pid || !w->pid)
		496	{
		497	w->priority = sw->priority; /* need to do it *now* */
		498	w->rpid = pid;
		499	w->rstatus = status;
		500	event (EV_A_ (W)w, EV_CHILD);
		501	}
		502	}
		503
		504	static void
		505	childcb (EV_P_ struct ev_signal *sw, int revents)
		506	{
409	int pid, status;	507	int pid, status;
410		508
411	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	509	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
412	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	510	{
413	if (w->pid == pid || w->pid == -1)	511	/* make sure we are called again until all childs have been reaped */
414	{	512	event (EV_A_ (W)sw, EV_SIGNAL);
415	w->status = status;	513
416	event ((W)w, EV_CHILD);	514	child_reap (EV_A_ sw, pid, pid, status);
417	}	515	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		516	}
418	}	517	}
		518
		519	#endif
419		520
420	/*****************************************************************************/	521	/*****************************************************************************/
421		522
		523	#if EV_USE_KQUEUE
		524	# include "ev_kqueue.c"
		525	#endif
422	#if EV_USE_EPOLL	526	#if EV_USE_EPOLL
423	# include "ev_epoll.c"	527	# include "ev_epoll.c"
424	#endif	528	#endif
		529	#if EV_USE_POLL
		530	# include "ev_poll.c"
		531	#endif
425	#if EV_USE_SELECT	532	#if EV_USE_SELECT
426	# include "ev_select.c"	533	# include "ev_select.c"
427	#endif	534	#endif
428		535
429	int	536	int
…		…
436	ev_version_minor (void)	543	ev_version_minor (void)
437	{	544	{
438	return EV_VERSION_MINOR;	545	return EV_VERSION_MINOR;
439	}	546	}
440		547
441	int ev_init (int flags)	548	/* return true if we are running with elevated privileges and should ignore env variables */
		549	static int
		550	enable_secure (void)
442	{	551	{
		552	#ifdef WIN32
		553	return 0;
		554	#else
		555	return getuid () != geteuid ()
		556	|| getgid () != getegid ();
		557	#endif
		558	}
		559
		560	int
		561	ev_method (EV_P)
		562	{
		563	return method;
		564	}
		565
		566	static void
		567	loop_init (EV_P_ int methods)
		568	{
443	if (!ev_method)	569	if (!method)
444	{	570	{
445	#if EV_USE_MONOTONIC	571	#if EV_USE_MONOTONIC
446	{	572	{
447	struct timespec ts;	573	struct timespec ts;
448	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
449	have_monotonic = 1;	575	have_monotonic = 1;
450	}	576	}
451	#endif	577	#endif
452		578
453	ev_now = ev_time ();	579	rt_now = ev_time ();
454	now = get_clock ();	580	mn_now = get_clock ();
		581	now_floor = mn_now;
455	diff = ev_now - now;	582	rtmn_diff = rt_now - mn_now;
456		583
457	if (pipe (sigpipe))	584	if (methods == EVMETHOD_AUTO)
458	return 0;	585	if (!enable_secure () && getenv ("LIBEV_METHODS"))
459		586	methods = atoi (getenv ("LIBEV_METHODS"));
		587	else
460	ev_method = EVMETHOD_NONE;	588	methods = EVMETHOD_ANY;
		589
		590	method = 0;
		591	#if EV_USE_KQUEUE
		592	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		593	#endif
461	#if EV_USE_EPOLL	594	#if EV_USE_EPOLL
462	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	595	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		596	#endif
		597	#if EV_USE_POLL
		598	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
463	#endif	599	#endif
464	#if EV_USE_SELECT	600	#if EV_USE_SELECT
465	if (ev_method == EVMETHOD_NONE) select_init (flags);	601	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
466	#endif	602	#endif
		603	}
		604	}
467		605
		606	void
		607	loop_destroy (EV_P)
		608	{
		609	#if EV_USE_KQUEUE
		610	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		611	#endif
		612	#if EV_USE_EPOLL
		613	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		614	#endif
		615	#if EV_USE_POLL
		616	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		617	#endif
		618	#if EV_USE_SELECT
		619	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		620	#endif
		621
		622	method = 0;
		623	/*TODO*/
		624	}
		625
		626	void
		627	loop_fork (EV_P)
		628	{
		629	/*TODO*/
		630	#if EV_USE_EPOLL
		631	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		632	#endif
		633	#if EV_USE_KQUEUE
		634	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		635	#endif
		636	}
		637
		638	#if EV_MULTIPLICITY
		639	struct ev_loop *
		640	ev_loop_new (int methods)
		641	{
		642	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		643
		644	loop_init (EV_A_ methods);
		645
		646	if (ev_methods (EV_A))
		647	return loop;
		648
		649	return 0;
		650	}
		651
		652	void
		653	ev_loop_destroy (EV_P)
		654	{
		655	loop_destroy (EV_A);
		656	free (loop);
		657	}
		658
		659	void
		660	ev_loop_fork (EV_P)
		661	{
		662	loop_fork (EV_A);
		663	}
		664
		665	#endif
		666
		667	#if EV_MULTIPLICITY
		668	struct ev_loop default_loop_struct;
		669	static struct ev_loop *default_loop;
		670
		671	struct ev_loop *
		672	#else
		673	static int default_loop;
		674
		675	int
		676	#endif
		677	ev_default_loop (int methods)
		678	{
		679	if (sigpipe [0] == sigpipe [1])
		680	if (pipe (sigpipe))
		681	return 0;
		682
		683	if (!default_loop)
		684	{
		685	#if EV_MULTIPLICITY
		686	struct ev_loop *loop = default_loop = &default_loop_struct;
		687	#else
		688	default_loop = 1;
		689	#endif
		690
		691	loop_init (EV_A_ methods);
		692
468	if (ev_method)	693	if (ev_method (EV_A))
469	{	694	{
470	ev_watcher_init (&sigev, sigcb);	695	ev_watcher_init (&sigev, sigcb);
		696	ev_set_priority (&sigev, EV_MAXPRI);
471	siginit ();	697	siginit (EV_A);
472		698
		699	#ifndef WIN32
473	ev_signal_init (&childev, childcb, SIGCHLD);	700	ev_signal_init (&childev, childcb, SIGCHLD);
		701	ev_set_priority (&childev, EV_MAXPRI);
474	ev_signal_start (&childev);	702	ev_signal_start (EV_A_ &childev);
		703	ev_unref (EV_A); /* child watcher should not keep loop alive */
		704	#endif
475	}	705	}
		706	else
		707	default_loop = 0;
476	}	708	}
477		709
478	return ev_method;	710	return default_loop;
479	}	711	}
480		712
481	/*****************************************************************************/
482
483	void	713	void
484	ev_prefork (void)	714	ev_default_destroy (void)
485	{	715	{
486	/* nop */	716	#if EV_MULTIPLICITY
487	}	717	struct ev_loop *loop = default_loop;
488
489	void
490	ev_postfork_parent (void)
491	{
492	/* nop */
493	}
494
495	void
496	ev_postfork_child (void)
497	{
498	#if EV_USE_EPOLL
499	if (ev_method == EVMETHOD_EPOLL)
500	epoll_postfork_child ();
501	#endif	718	#endif
502		719
		720	ev_ref (EV_A); /* child watcher */
		721	ev_signal_stop (EV_A_ &childev);
		722
		723	ev_ref (EV_A); /* signal watcher */
503	ev_io_stop (&sigev);	724	ev_io_stop (EV_A_ &sigev);
		725
		726	close (sigpipe [0]); sigpipe [0] = 0;
		727	close (sigpipe [1]); sigpipe [1] = 0;
		728
		729	loop_destroy (EV_A);
		730	}
		731
		732	void
		733	ev_default_fork (EV_P)
		734	{
		735	loop_fork (EV_A);
		736
		737	ev_io_stop (EV_A_ &sigev);
504	close (sigpipe [0]);	738	close (sigpipe [0]);
505	close (sigpipe [1]);	739	close (sigpipe [1]);
506	pipe (sigpipe);	740	pipe (sigpipe);
		741
		742	ev_ref (EV_A); /* signal watcher */
507	siginit ();	743	siginit (EV_A);
508	}	744	}
509		745
510	/*****************************************************************************/	746	/*****************************************************************************/
511		747
512	static void	748	static void
513	call_pending (void)	749	call_pending (EV_P)
514	{	750	{
		751	int pri;
		752
		753	for (pri = NUMPRI; pri--; )
515	while (pendingcnt)	754	while (pendingcnt [pri])
516	{	755	{
517	ANPENDING *p = pendings + --pendingcnt;	756	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
518		757
519	if (p->w)	758	if (p->w)
520	{	759	{
521	p->w->pending = 0;	760	p->w->pending = 0;
522	p->w->cb (p->w, p->events);	761	p->w->cb (EV_A_ p->w, p->events);
523	}	762	}
524	}	763	}
525	}	764	}
526		765
527	static void	766	static void
528	timers_reify (void)	767	timers_reify (EV_P)
529	{	768	{
530	while (timercnt && timers [0]->at <= now)	769	while (timercnt && timers [0]->at <= mn_now)
531	{	770	{
532	struct ev_timer *w = timers [0];	771	struct ev_timer *w = timers [0];
533		772
534	/* first reschedule or stop timer */	773	/* first reschedule or stop timer */
535	if (w->repeat)	774	if (w->repeat)
536	{	775	{
		776	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
537	w->at = now + w->repeat;	777	w->at = mn_now + w->repeat;
538	assert (("timer timeout in the past, negative repeat?", w->at > now));
539	downheap ((WT *)timers, timercnt, 0);	778	downheap ((WT *)timers, timercnt, 0);
540	}	779	}
541	else	780	else
542	ev_timer_stop (w); /* nonrepeating: stop timer */	781	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
543		782
544	event ((W)w, EV_TIMEOUT);	783	event (EV_A_ (W)w, EV_TIMEOUT);
545	}	784	}
546	}	785	}
547		786
548	static void	787	static void
549	periodics_reify (void)	788	periodics_reify (EV_P)
550	{	789	{
551	while (periodiccnt && periodics [0]->at <= ev_now)	790	while (periodiccnt && periodics [0]->at <= rt_now)
552	{	791	{
553	struct ev_periodic *w = periodics [0];	792	struct ev_periodic *w = periodics [0];
554		793
555	/* first reschedule or stop timer */	794	/* first reschedule or stop timer */
556	if (w->interval)	795	if (w->interval)
557	{	796	{
558	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	797	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));	798	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
560	downheap ((WT *)periodics, periodiccnt, 0);	799	downheap ((WT *)periodics, periodiccnt, 0);
561	}	800	}
562	else	801	else
563	ev_periodic_stop (w); /* nonrepeating: stop timer */	802	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
564		803
565	event ((W)w, EV_TIMEOUT);	804	event (EV_A_ (W)w, EV_PERIODIC);
566	}	805	}
567	}	806	}
568		807
569	static void	808	static void
570	periodics_reschedule (ev_tstamp diff)	809	periodics_reschedule (EV_P)
571	{	810	{
572	int i;	811	int i;
573		812
574	/* adjust periodics after time jump */	813	/* adjust periodics after time jump */
575	for (i = 0; i < periodiccnt; ++i)	814	for (i = 0; i < periodiccnt; ++i)
576	{	815	{
577	struct ev_periodic *w = periodics [i];	816	struct ev_periodic *w = periodics [i];
578		817
579	if (w->interval)	818	if (w->interval)
580	{	819	{
581	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	820	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
582		821
583	if (fabs (diff) >= 1e-4)	822	if (fabs (diff) >= 1e-4)
584	{	823	{
585	ev_periodic_stop (w);	824	ev_periodic_stop (EV_A_ w);
586	ev_periodic_start (w);	825	ev_periodic_start (EV_A_ w);
587		826
588	i = 0; /* restart loop, inefficient, but time jumps should be rare */	827	i = 0; /* restart loop, inefficient, but time jumps should be rare */
589	}	828	}
590	}	829	}
591	}	830	}
592	}	831	}
593		832
		833	inline int
		834	time_update_monotonic (EV_P)
		835	{
		836	mn_now = get_clock ();
		837
		838	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
		839	{
		840	rt_now = rtmn_diff + mn_now;
		841	return 0;
		842	}
		843	else
		844	{
		845	now_floor = mn_now;
		846	rt_now = ev_time ();
		847	return 1;
		848	}
		849	}
		850
594	static void	851	static void
595	time_update (void)	852	time_update (EV_P)
596	{	853	{
597	int i;	854	int i;
598		855
599	ev_now = ev_time ();	856	#if EV_USE_MONOTONIC
600
601	if (have_monotonic)	857	if (expect_true (have_monotonic))
602	{	858	{
603	ev_tstamp odiff = diff;	859	if (time_update_monotonic (EV_A))
604
605	for (i = 4; --i; ) /* loop a few times, before making important decisions */
606	{	860	{
607	now = get_clock ();	861	ev_tstamp odiff = rtmn_diff;
		862
		863	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		864	{
608	diff = ev_now - now;	865	rtmn_diff = rt_now - mn_now;
609		866
610	if (fabs (odiff - diff) < MIN_TIMEJUMP)	867	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
611	return; /* all is well */	868	return; /* all is well */
612		869
613	ev_now = ev_time ();	870	rt_now = ev_time ();
		871	mn_now = get_clock ();
		872	now_floor = mn_now;
		873	}
		874
		875	periodics_reschedule (EV_A);
		876	/* no timer adjustment, as the monotonic clock doesn't jump */
		877	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
614	}	878	}
615
616	periodics_reschedule (diff - odiff);
617	/* no timer adjustment, as the monotonic clock doesn't jump */
618	}	879	}
619	else	880	else
		881	#endif
620	{	882	{
621	if (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)	883	rt_now = ev_time ();
		884
		885	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
622	{	886	{
623	periodics_reschedule (ev_now - now);	887	periodics_reschedule (EV_A);
624		888
625	/* adjust timers. this is easy, as the offset is the same for all */	889	/* adjust timers. this is easy, as the offset is the same for all */
626	for (i = 0; i < timercnt; ++i)	890	for (i = 0; i < timercnt; ++i)
627	timers [i]->at += diff;	891	timers [i]->at += rt_now - mn_now;
628	}	892	}
629		893
630	now = ev_now;	894	mn_now = rt_now;
631	}	895	}
632	}	896	}
633		897
634	int ev_loop_done;	898	void
		899	ev_ref (EV_P)
		900	{
		901	++activecnt;
		902	}
635		903
		904	void
		905	ev_unref (EV_P)
		906	{
		907	--activecnt;
		908	}
		909
		910	static int loop_done;
		911
		912	void
636	void ev_loop (int flags)	913	ev_loop (EV_P_ int flags)
637	{	914	{
638	double block;	915	double block;
639	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	916	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
640		917
641	do	918	do
642	{	919	{
643	/* queue check watchers (and execute them) */	920	/* queue check watchers (and execute them) */
644	if (preparecnt)	921	if (expect_false (preparecnt))
645	{	922	{
646	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	923	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
647	call_pending ();	924	call_pending (EV_A);
648	}	925	}
649		926
650	/* update fd-related kernel structures */	927	/* update fd-related kernel structures */
651	fd_reify ();	928	fd_reify (EV_A);
652		929
653	/* calculate blocking time */	930	/* calculate blocking time */
654		931
655	/* we only need this for !monotonic clockor timers, but as we basically	932	/* we only need this for !monotonic clockor timers, but as we basically
656	always have timers, we just calculate it always */	933	always have timers, we just calculate it always */
		934	#if EV_USE_MONOTONIC
		935	if (expect_true (have_monotonic))
		936	time_update_monotonic (EV_A);
		937	else
		938	#endif
		939	{
657	ev_now = ev_time ();	940	rt_now = ev_time ();
		941	mn_now = rt_now;
		942	}
658		943
659	if (flags & EVLOOP_NONBLOCK || idlecnt)	944	if (flags & EVLOOP_NONBLOCK || idlecnt)
660	block = 0.;	945	block = 0.;
661	else	946	else
662	{	947	{
663	block = MAX_BLOCKTIME;	948	block = MAX_BLOCKTIME;
664		949
665	if (timercnt)	950	if (timercnt)
666	{	951	{
667	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;	952	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
668	if (block > to) block = to;	953	if (block > to) block = to;
669	}	954	}
670		955
671	if (periodiccnt)	956	if (periodiccnt)
672	{	957	{
673	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	958	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
674	if (block > to) block = to;	959	if (block > to) block = to;
675	}	960	}
676		961
677	if (block < 0.) block = 0.;	962	if (block < 0.) block = 0.;
678	}	963	}
679		964
680	method_poll (block);	965	method_poll (EV_A_ block);
681		966
682	/* update ev_now, do magic */	967	/* update rt_now, do magic */
683	time_update ();	968	time_update (EV_A);
684		969
685	/* queue pending timers and reschedule them */	970	/* queue pending timers and reschedule them */
686	timers_reify (); /* relative timers called last */	971	timers_reify (EV_A); /* relative timers called last */
687	periodics_reify (); /* absolute timers called first */	972	periodics_reify (EV_A); /* absolute timers called first */
688		973
689	/* queue idle watchers unless io or timers are pending */	974	/* queue idle watchers unless io or timers are pending */
690	if (!pendingcnt)	975	if (!pendingcnt)
691	queue_events ((W *)idles, idlecnt, EV_IDLE);	976	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
692		977
693	/* queue check watchers, to be executed first */	978	/* queue check watchers, to be executed first */
694	if (checkcnt)	979	if (checkcnt)
695	queue_events ((W *)checks, checkcnt, EV_CHECK);	980	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
696		981
697	call_pending ();	982	call_pending (EV_A);
698	}	983	}
699	while (!ev_loop_done);	984	while (activecnt && !loop_done);
700		985
701	if (ev_loop_done != 2)	986	if (loop_done != 2)
702	ev_loop_done = 0;	987	loop_done = 0;
		988	}
		989
		990	void
		991	ev_unloop (EV_P_ int how)
		992	{
		993	loop_done = how;
703	}	994	}
704		995
705	/*****************************************************************************/	996	/*****************************************************************************/
706		997
707	static void	998	inline void
708	wlist_add (WL *head, WL elem)	999	wlist_add (WL *head, WL elem)
709	{	1000	{
710	elem->next = *head;	1001	elem->next = *head;
711	*head = elem;	1002	*head = elem;
712	}	1003	}
713		1004
714	static void	1005	inline void
715	wlist_del (WL *head, WL elem)	1006	wlist_del (WL *head, WL elem)
716	{	1007	{
717	while (*head)	1008	while (*head)
718	{	1009	{
719	if (*head == elem)	1010	if (*head == elem)
…		…
724		1015
725	head = &(*head)->next;	1016	head = &(*head)->next;
726	}	1017	}
727	}	1018	}
728		1019
729	static void	1020	inline void
730	ev_clear (W w)	1021	ev_clear_pending (EV_P_ W w)
731	{	1022	{
732	if (w->pending)	1023	if (w->pending)
733	{	1024	{
734	pendings [w->pending - 1].w = 0;	1025	pendings [ABSPRI (w)][w->pending - 1].w = 0;
735	w->pending = 0;	1026	w->pending = 0;
736	}	1027	}
737	}	1028	}
738		1029
739	static void	1030	inline void
740	ev_start (W w, int active)	1031	ev_start (EV_P_ W w, int active)
741	{	1032	{
		1033	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1034	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1035
742	w->active = active;	1036	w->active = active;
		1037	ev_ref (EV_A);
743	}	1038	}
744		1039
745	static void	1040	inline void
746	ev_stop (W w)	1041	ev_stop (EV_P_ W w)
747	{	1042	{
		1043	ev_unref (EV_A);
748	w->active = 0;	1044	w->active = 0;
749	}	1045	}
750		1046
751	/*****************************************************************************/	1047	/*****************************************************************************/
752		1048
753	void	1049	void
754	ev_io_start (struct ev_io *w)	1050	ev_io_start (EV_P_ struct ev_io *w)
755	{	1051	{
		1052	int fd = w->fd;
		1053
756	if (ev_is_active (w))	1054	if (ev_is_active (w))
757	return;	1055	return;
758		1056
759	int fd = w->fd;	1057	assert (("ev_io_start called with negative fd", fd >= 0));
760		1058
761	ev_start ((W)w, 1);	1059	ev_start (EV_A_ (W)w, 1);
762	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1060	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
763	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1061	wlist_add ((WL *)&anfds[fd].head, (WL)w);
764		1062
765	fd_change (fd);	1063	fd_change (EV_A_ fd);
766	}	1064	}
767		1065
768	void	1066	void
769	ev_io_stop (struct ev_io *w)	1067	ev_io_stop (EV_P_ struct ev_io *w)
770	{	1068	{
771	ev_clear ((W)w);	1069	ev_clear_pending (EV_A_ (W)w);
772	if (!ev_is_active (w))	1070	if (!ev_is_active (w))
773	return;	1071	return;
774		1072
775	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1073	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
776	ev_stop ((W)w);	1074	ev_stop (EV_A_ (W)w);
777		1075
778	fd_change (w->fd);	1076	fd_change (EV_A_ w->fd);
779	}	1077	}
780		1078
781	void	1079	void
782	ev_timer_start (struct ev_timer *w)	1080	ev_timer_start (EV_P_ struct ev_timer *w)
783	{	1081	{
784	if (ev_is_active (w))	1082	if (ev_is_active (w))
785	return;	1083	return;
786		1084
787	w->at += now;	1085	w->at += mn_now;
788		1086
789	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));	1087	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
790		1088
791	ev_start ((W)w, ++timercnt);	1089	ev_start (EV_A_ (W)w, ++timercnt);
792	array_needsize (timers, timermax, timercnt, );	1090	array_needsize (timers, timermax, timercnt, );
793	timers [timercnt - 1] = w;	1091	timers [timercnt - 1] = w;
794	upheap ((WT *)timers, timercnt - 1);	1092	upheap ((WT *)timers, timercnt - 1);
795	}	1093	}
796		1094
797	void	1095	void
798	ev_timer_stop (struct ev_timer *w)	1096	ev_timer_stop (EV_P_ struct ev_timer *w)
799	{	1097	{
800	ev_clear ((W)w);	1098	ev_clear_pending (EV_A_ (W)w);
801	if (!ev_is_active (w))	1099	if (!ev_is_active (w))
802	return;	1100	return;
803		1101
804	if (w->active < timercnt--)	1102	if (w->active < timercnt--)
805	{	1103	{
…		…
807	downheap ((WT *)timers, timercnt, w->active - 1);	1105	downheap ((WT *)timers, timercnt, w->active - 1);
808	}	1106	}
809		1107
810	w->at = w->repeat;	1108	w->at = w->repeat;
811		1109
812	ev_stop ((W)w);	1110	ev_stop (EV_A_ (W)w);
813	}	1111	}
814		1112
815	void	1113	void
816	ev_timer_again (struct ev_timer *w)	1114	ev_timer_again (EV_P_ struct ev_timer *w)
817	{	1115	{
818	if (ev_is_active (w))	1116	if (ev_is_active (w))
819	{	1117	{
820	if (w->repeat)	1118	if (w->repeat)
821	{	1119	{
822	w->at = now + w->repeat;	1120	w->at = mn_now + w->repeat;
823	downheap ((WT *)timers, timercnt, w->active - 1);	1121	downheap ((WT *)timers, timercnt, w->active - 1);
824	}	1122	}
825	else	1123	else
826	ev_timer_stop (w);	1124	ev_timer_stop (EV_A_ w);
827	}	1125	}
828	else if (w->repeat)	1126	else if (w->repeat)
829	ev_timer_start (w);	1127	ev_timer_start (EV_A_ w);
830	}	1128	}
831		1129
832	void	1130	void
833	ev_periodic_start (struct ev_periodic *w)	1131	ev_periodic_start (EV_P_ struct ev_periodic *w)
834	{	1132	{
835	if (ev_is_active (w))	1133	if (ev_is_active (w))
836	return;	1134	return;
837		1135
838	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));	1136	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
839		1137
840	/* this formula differs from the one in periodic_reify because we do not always round up */	1138	/* this formula differs from the one in periodic_reify because we do not always round up */
841	if (w->interval)	1139	if (w->interval)
842	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1140	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
843		1141
844	ev_start ((W)w, ++periodiccnt);	1142	ev_start (EV_A_ (W)w, ++periodiccnt);
845	array_needsize (periodics, periodicmax, periodiccnt, );	1143	array_needsize (periodics, periodicmax, periodiccnt, );
846	periodics [periodiccnt - 1] = w;	1144	periodics [periodiccnt - 1] = w;
847	upheap ((WT *)periodics, periodiccnt - 1);	1145	upheap ((WT *)periodics, periodiccnt - 1);
848	}	1146	}
849		1147
850	void	1148	void
851	ev_periodic_stop (struct ev_periodic *w)	1149	ev_periodic_stop (EV_P_ struct ev_periodic *w)
852	{	1150	{
853	ev_clear ((W)w);	1151	ev_clear_pending (EV_A_ (W)w);
854	if (!ev_is_active (w))	1152	if (!ev_is_active (w))
855	return;	1153	return;
856		1154
857	if (w->active < periodiccnt--)	1155	if (w->active < periodiccnt--)
858	{	1156	{
859	periodics [w->active - 1] = periodics [periodiccnt];	1157	periodics [w->active - 1] = periodics [periodiccnt];
860	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1158	downheap ((WT *)periodics, periodiccnt, w->active - 1);
861	}	1159	}
862		1160
863	ev_stop ((W)w);	1161	ev_stop (EV_A_ (W)w);
864	}	1162	}
865		1163
866	void	1164	void
867	ev_signal_start (struct ev_signal *w)	1165	ev_idle_start (EV_P_ struct ev_idle *w)
868	{	1166	{
869	if (ev_is_active (w))	1167	if (ev_is_active (w))
870	return;	1168	return;
871		1169
		1170	ev_start (EV_A_ (W)w, ++idlecnt);
		1171	array_needsize (idles, idlemax, idlecnt, );
		1172	idles [idlecnt - 1] = w;
		1173	}
		1174
		1175	void
		1176	ev_idle_stop (EV_P_ struct ev_idle *w)
		1177	{
		1178	ev_clear_pending (EV_A_ (W)w);
		1179	if (ev_is_active (w))
		1180	return;
		1181
		1182	idles [w->active - 1] = idles [--idlecnt];
		1183	ev_stop (EV_A_ (W)w);
		1184	}
		1185
		1186	void
		1187	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1188	{
		1189	if (ev_is_active (w))
		1190	return;
		1191
		1192	ev_start (EV_A_ (W)w, ++preparecnt);
		1193	array_needsize (prepares, preparemax, preparecnt, );
		1194	prepares [preparecnt - 1] = w;
		1195	}
		1196
		1197	void
		1198	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1199	{
		1200	ev_clear_pending (EV_A_ (W)w);
		1201	if (ev_is_active (w))
		1202	return;
		1203
		1204	prepares [w->active - 1] = prepares [--preparecnt];
		1205	ev_stop (EV_A_ (W)w);
		1206	}
		1207
		1208	void
		1209	ev_check_start (EV_P_ struct ev_check *w)
		1210	{
		1211	if (ev_is_active (w))
		1212	return;
		1213
		1214	ev_start (EV_A_ (W)w, ++checkcnt);
		1215	array_needsize (checks, checkmax, checkcnt, );
		1216	checks [checkcnt - 1] = w;
		1217	}
		1218
		1219	void
		1220	ev_check_stop (EV_P_ struct ev_check *w)
		1221	{
		1222	ev_clear_pending (EV_A_ (W)w);
		1223	if (ev_is_active (w))
		1224	return;
		1225
		1226	checks [w->active - 1] = checks [--checkcnt];
		1227	ev_stop (EV_A_ (W)w);
		1228	}
		1229
		1230	#ifndef SA_RESTART
		1231	# define SA_RESTART 0
		1232	#endif
		1233
		1234	void
		1235	ev_signal_start (EV_P_ struct ev_signal *w)
		1236	{
		1237	#if EV_MULTIPLICITY
		1238	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1239	#endif
		1240	if (ev_is_active (w))
		1241	return;
		1242
		1243	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
		1244
872	ev_start ((W)w, 1);	1245	ev_start (EV_A_ (W)w, 1);
873	array_needsize (signals, signalmax, w->signum, signals_init);	1246	array_needsize (signals, signalmax, w->signum, signals_init);
874	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1247	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
875		1248
876	if (!w->next)	1249	if (!w->next)
877	{	1250	{
878	struct sigaction sa;	1251	struct sigaction sa;
879	sa.sa_handler = sighandler;	1252	sa.sa_handler = sighandler;
880	sigfillset (&sa.sa_mask);	1253	sigfillset (&sa.sa_mask);
881	sa.sa_flags = 0;	1254	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
882	sigaction (w->signum, &sa, 0);	1255	sigaction (w->signum, &sa, 0);
883	}	1256	}
884	}	1257	}
885		1258
886	void	1259	void
887	ev_signal_stop (struct ev_signal *w)	1260	ev_signal_stop (EV_P_ struct ev_signal *w)
888	{	1261	{
889	ev_clear ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
890	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
891	return;	1264	return;
892		1265
893	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1266	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
894	ev_stop ((W)w);	1267	ev_stop (EV_A_ (W)w);
895		1268
896	if (!signals [w->signum - 1].head)	1269	if (!signals [w->signum - 1].head)
897	signal (w->signum, SIG_DFL);	1270	signal (w->signum, SIG_DFL);
898	}	1271	}
899		1272
900	void	1273	void
901	ev_idle_start (struct ev_idle *w)	1274	ev_child_start (EV_P_ struct ev_child *w)
902	{	1275	{
		1276	#if EV_MULTIPLICITY
		1277	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1278	#endif
903	if (ev_is_active (w))	1279	if (ev_is_active (w))
904	return;	1280	return;
905		1281
906	ev_start ((W)w, ++idlecnt);	1282	ev_start (EV_A_ (W)w, 1);
907	array_needsize (idles, idlemax, idlecnt, );	1283	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
908	idles [idlecnt - 1] = w;
909	}	1284	}
910		1285
911	void	1286	void
912	ev_idle_stop (struct ev_idle *w)	1287	ev_child_stop (EV_P_ struct ev_child *w)
913	{	1288	{
914	ev_clear ((W)w);	1289	ev_clear_pending (EV_A_ (W)w);
915	if (ev_is_active (w))	1290	if (ev_is_active (w))
916	return;	1291	return;
917		1292
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);	1293	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
984	ev_stop ((W)w);	1294	ev_stop (EV_A_ (W)w);
985	}	1295	}
986		1296
987	/*****************************************************************************/	1297	/*****************************************************************************/
988		1298
989	struct ev_once	1299	struct ev_once
…		…
993	void (*cb)(int revents, void *arg);	1303	void (*cb)(int revents, void *arg);
994	void *arg;	1304	void *arg;
995	};	1305	};
996		1306
997	static void	1307	static void
998	once_cb (struct ev_once *once, int revents)	1308	once_cb (EV_P_ struct ev_once *once, int revents)
999	{	1309	{
1000	void (*cb)(int revents, void *arg) = once->cb;	1310	void (*cb)(int revents, void *arg) = once->cb;
1001	void *arg = once->arg;	1311	void *arg = once->arg;
1002		1312
1003	ev_io_stop (&once->io);	1313	ev_io_stop (EV_A_ &once->io);
1004	ev_timer_stop (&once->to);	1314	ev_timer_stop (EV_A_ &once->to);
1005	free (once);	1315	free (once);
1006		1316
1007	cb (revents, arg);	1317	cb (revents, arg);
1008	}	1318	}
1009		1319
1010	static void	1320	static void
1011	once_cb_io (struct ev_io *w, int revents)	1321	once_cb_io (EV_P_ struct ev_io *w, int revents)
1012	{	1322	{
1013	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1323	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1014	}	1324	}
1015		1325
1016	static void	1326	static void
1017	once_cb_to (struct ev_timer *w, int revents)	1327	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1018	{	1328	{
1019	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1329	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1020	}	1330	}
1021		1331
1022	void	1332	void
1023	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1333	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1024	{	1334	{
1025	struct ev_once *once = malloc (sizeof (struct ev_once));	1335	struct ev_once *once = malloc (sizeof (struct ev_once));
1026		1336
1027	if (!once)	1337	if (!once)
1028	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1338	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1033		1343
1034	ev_watcher_init (&once->io, once_cb_io);	1344	ev_watcher_init (&once->io, once_cb_io);
1035	if (fd >= 0)	1345	if (fd >= 0)
1036	{	1346	{
1037	ev_io_set (&once->io, fd, events);	1347	ev_io_set (&once->io, fd, events);
1038	ev_io_start (&once->io);	1348	ev_io_start (EV_A_ &once->io);
1039	}	1349	}
1040		1350
1041	ev_watcher_init (&once->to, once_cb_to);	1351	ev_watcher_init (&once->to, once_cb_to);
1042	if (timeout >= 0.)	1352	if (timeout >= 0.)
1043	{	1353	{
1044	ev_timer_set (&once->to, timeout, 0.);	1354	ev_timer_set (&once->to, timeout, 0.);
1045	ev_timer_start (&once->to);	1355	ev_timer_start (EV_A_ &once->to);
1046	}	1356	}
1047	}	1357	}
1048	}	1358	}
1049		1359
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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