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Comparing libev/ev.c (file contents):
Revision 1.30 by root, Thu Nov 1 08:28:33 2007 UTC vs.
Revision 1.59 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
63	#ifndef EV_USE_REALTIME	75	#ifndef EV_USE_REALTIME
64	# define EV_USE_REALTIME 1 /* posix requirement, but might be slower */	76	# define EV_USE_REALTIME 1
65	#endif	77	#endif
		78
		79	/**/
		80
		81	#ifndef CLOCK_MONOTONIC
		82	# undef EV_USE_MONOTONIC
		83	# define EV_USE_MONOTONIC 0
		84	#endif
		85
		86	#ifndef CLOCK_REALTIME
		87	# undef EV_USE_REALTIME
		88	# define EV_USE_REALTIME 0
		89	#endif
		90
		91	/**/
66		92
67	#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) */
68	#define MAX_BLOCKTIME 59.731	94	#define MAX_BLOCKTIME 59.731 /* never wait longer than this time (to detect time jumps) */
69	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */	95	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
		96	/*#define CLEANUP_INTERVAL 300. /* how often to try to free memory and re-check fds */
70		97
71	#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)
72		113
73	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
74	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
75	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
76		117
77	static ev_tstamp now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
78	ev_tstamp ev_now;
79	int ev_method;
80
81	static int have_monotonic; /* runtime */
82
83	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
84	static void (*method_modify)(int fd, int oev, int nev);
85	static void (*method_poll)(ev_tstamp timeout);
86		119
87	/*****************************************************************************/	120	/*****************************************************************************/
88		121
89	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
90	ev_time (void)	156	ev_time (void)
91	{	157	{
92	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
93	struct timespec ts;	159	struct timespec ts;
94	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
98	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
99	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
100	#endif	166	#endif
101	}	167	}
102		168
103	static ev_tstamp	169	inline ev_tstamp
104	get_clock (void)	170	get_clock (void)
105	{	171	{
106	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
107	if (have_monotonic)	173	if (expect_true (have_monotonic))
108	{	174	{
109	struct timespec ts;	175	struct timespec ts;
110	clock_gettime (CLOCK_MONOTONIC, &ts);	176	clock_gettime (CLOCK_MONOTONIC, &ts);
111	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
112	}	178	}
113	#endif	179	#endif
114		180
115	return ev_time ();	181	return ev_time ();
116	}	182	}
117		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
		188	}
		189
118	#define array_roundsize(base,n) ((n) | 4 & ~3)	190	#define array_roundsize(base,n) ((n) | 4 & ~3)
119		191
120	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
121	if ((cnt) > cur) \	193	if (expect_false ((cnt) > cur)) \
122	{ \	194	{ \
123	int newcnt = cur; \	195	int newcnt = cur; \
124	do \	196	do \
125	{ \	197	{ \
126	newcnt = array_roundsize (base, newcnt << 1); \	198	newcnt = array_roundsize (base, newcnt << 1); \
…		…
132	cur = newcnt; \	204	cur = newcnt; \
133	}	205	}
134		206
135	/*****************************************************************************/	207	/*****************************************************************************/
136		208
137	typedef struct
138	{
139	struct ev_io *head;
140	int events;
141	} ANFD;
142
143	static ANFD *anfds;
144	static int anfdmax;
145
146	static void	209	static void
147	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
148	{	211	{
149	while (count--)	212	while (count--)
150	{	213	{
151	base->head = 0;	214	base->head = 0;
152	base->events = EV_NONE;	215	base->events = EV_NONE;
		216	base->reify = 0;
		217
153	++base;	218	++base;
154	}	219	}
155	}	220	}
156		221
157	typedef struct
158	{
159	W w;
160	int events;
161	} ANPENDING;
162
163	static ANPENDING *pendings;
164	static int pendingmax, pendingcnt;
165
166	static void	222	static void
167	event (W w, int events)	223	event (EV_P_ W w, int events)
168	{	224	{
		225	if (w->pending)
		226	{
		227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
		228	return;
		229	}
		230
169	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
170	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
171	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
172	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
173	}	235	}
174		236
175	static void	237	static void
176	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
177	{	239	{
178	int i;	240	int i;
179		241
180	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
181	event (events [i], type);	243	event (EV_A_ events [i], type);
182	}	244	}
183		245
184	static void	246	static void
185	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
186	{	248	{
187	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
188	struct ev_io *w;	250	struct ev_io *w;
189		251
190	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
191	{	253	{
192	int ev = w->events & events;	254	int ev = w->events & events;
193		255
194	if (ev)	256	if (ev)
195	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
196	}	258	}
197	}	259	}
198		260
199	/*****************************************************************************/	261	/*****************************************************************************/
200		262
201	static int *fdchanges;
202	static int fdchangemax, fdchangecnt;
203
204	static void	263	static void
205	fd_reify (void)	264	fd_reify (EV_P)
206	{	265	{
207	int i;	266	int i;
208		267
209	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
210	{	269	{
…		…
212	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
213	struct ev_io *w;	272	struct ev_io *w;
214		273
215	int events = 0;	274	int events = 0;
216		275
217	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
218	events |= w->events;	277	events |= w->events;
219		278
220	anfd->events &= ~EV_REIFY;	279	anfd->reify = 0;
221		280
222	if (anfd->events != events)	281	if (anfd->events != events)
223	{	282	{
224	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
225	anfd->events = events;	284	anfd->events = events;
226	}	285	}
227	}	286	}
228		287
229	fdchangecnt = 0;	288	fdchangecnt = 0;
230	}	289	}
231		290
232	static void	291	static void
233	fd_change (int fd)	292	fd_change (EV_P_ int fd)
234	{	293	{
235	if (anfds [fd].events & EV_REIFY || fdchangecnt < 0)	294	if (anfds [fd].reify || fdchangecnt < 0)
236	return;	295	return;
237		296
238	anfds [fd].events |= EV_REIFY;	297	anfds [fd].reify = 1;
239		298
240	++fdchangecnt;	299	++fdchangecnt;
241	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
242	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
243	}	302	}
244		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
245	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
246	static void	317	static void
247	fd_recheck (void)	318	fd_ebadf (EV_P)
248	{	319	{
249	int fd;	320	int fd;
250		321
251	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
252	if (anfds [fd].events)	323	if (anfds [fd].events)
253	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
254	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)
255	{	336	{
256	event ((W)anfds [fd].head, EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT);	337	close (fd);
257	ev_io_stop (anfds [fd].head);	338	fd_kill (EV_A_ fd);
		339	return;
258	}	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	}
259	}	356	}
260		357
261	/*****************************************************************************/	358	/*****************************************************************************/
262		359
263	static struct ev_timer **timers;
264	static int timermax, timercnt;
265
266	static struct ev_periodic **periodics;
267	static int periodicmax, periodiccnt;
268
269	static void	360	static void
270	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
271	{	362	{
272	WT w = timers [k];	363	WT w = heap [k];
273		364
274	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
275	{	366	{
276	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
277	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
278	k >>= 1;	369	k >>= 1;
279	}	370	}
280		371
281	timers [k] = w;	372	heap [k] = w;
282	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
283		374
284	}	375	}
285		376
286	static void	377	static void
287	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
288	{	379	{
289	WT w = timers [k];	380	WT w = heap [k];
290		381
291	while (k < (N >> 1))	382	while (k < (N >> 1))
292	{	383	{
293	int j = k << 1;	384	int j = k << 1;
294		385
295	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
296	++j;	387	++j;
297		388
298	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
299	break;	390	break;
300		391
301	timers [k] = timers [j];	392	heap [k] = heap [j];
302	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
303	k = j;	394	k = j;
304	}	395	}
305		396
306	timers [k] = w;	397	heap [k] = w;
307	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
308	}	399	}
309		400
310	/*****************************************************************************/	401	/*****************************************************************************/
311		402
312	typedef struct	403	typedef struct
313	{	404	{
314	struct ev_signal *head;	405	struct ev_watcher_list *head;
315	sig_atomic_t gotsig;	406	sig_atomic_t volatile gotsig;
316	} ANSIG;	407	} ANSIG;
317		408
318	static ANSIG *signals;	409	static ANSIG *signals;
319	static int signalmax;	410	static int signalmax;
320		411
321	static int sigpipe [2];	412	static int sigpipe [2];
322	static sig_atomic_t gotsig;	413	static sig_atomic_t volatile gotsig;
323	static struct ev_io sigev;	414	static struct ev_io sigev;
324		415
325	static void	416	static void
326	signals_init (ANSIG *base, int count)	417	signals_init (ANSIG *base, int count)
327	{	418	{
328	while (count--)	419	while (count--)
329	{	420	{
330	base->head = 0;	421	base->head = 0;
331	base->gotsig = 0;	422	base->gotsig = 0;
		423
332	++base;	424	++base;
333	}	425	}
334	}	426	}
335		427
336	static void	428	static void
…		…
338	{	430	{
339	signals [signum - 1].gotsig = 1;	431	signals [signum - 1].gotsig = 1;
340		432
341	if (!gotsig)	433	if (!gotsig)
342	{	434	{
		435	int old_errno = errno;
343	gotsig = 1;	436	gotsig = 1;
344	write (sigpipe [1], &gotsig, 1);	437	write (sigpipe [1], &signum, 1);
		438	errno = old_errno;
345	}	439	}
346	}	440	}
347		441
348	static void	442	static void
349	sigcb (struct ev_io *iow, int revents)	443	sigcb (EV_P_ struct ev_io *iow, int revents)
350	{	444	{
351	struct ev_signal *w;	445	struct ev_watcher_list *w;
352	int sig;	446	int signum;
353		447
		448	read (sigpipe [0], &revents, 1);
354	gotsig = 0;	449	gotsig = 0;
355	read (sigpipe [0], &revents, 1);
356		450
357	for (sig = signalmax; sig--; )	451	for (signum = signalmax; signum--; )
358	if (signals [sig].gotsig)	452	if (signals [signum].gotsig)
359	{	453	{
360	signals [sig].gotsig = 0;	454	signals [signum].gotsig = 0;
361		455
362	for (w = signals [sig].head; w; w = w->next)	456	for (w = signals [signum].head; w; w = w->next)
363	event ((W)w, EV_SIGNAL);	457	event (EV_A_ (W)w, EV_SIGNAL);
364	}	458	}
365	}	459	}
366		460
367	static void	461	static void
368	siginit (void)	462	siginit (EV_P)
369	{	463	{
		464	#ifndef WIN32
370	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
371	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	466	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
372		467
373	/* rather than sort out wether we really need nb, set it */	468	/* rather than sort out wether we really need nb, set it */
374	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
375	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	470	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		471	#endif
376		472
377	ev_io_set (&sigev, sigpipe [0], EV_READ);	473	ev_io_set (&sigev, sigpipe [0], EV_READ);
378	ev_io_start (&sigev);	474	ev_io_start (EV_A_ &sigev);
		475	ev_unref (EV_A); /* child watcher should not keep loop alive */
379	}	476	}
380		477
381	/*****************************************************************************/	478	/*****************************************************************************/
382		479
383	static struct ev_idle **idles;	480	#ifndef WIN32
384	static int idlemax, idlecnt;
385
386	static struct ev_prepare **prepares;
387	static int preparemax, preparecnt;
388
389	static struct ev_check **checks;
390	static int checkmax, checkcnt;
391
392	/*****************************************************************************/
393		481
394	static struct ev_child *childs [PID_HASHSIZE];	482	static struct ev_child *childs [PID_HASHSIZE];
395	static struct ev_signal childev;	483	static struct ev_signal childev;
396		484
397	#ifndef WCONTINUED	485	#ifndef WCONTINUED
398	# define WCONTINUED 0	486	# define WCONTINUED 0
399	#endif	487	#endif
400		488
401	static void	489	static void
402	childcb (struct ev_signal *sw, int revents)	490	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
403	{	491	{
404	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	{
405	int pid, status;	507	int pid, status;
406		508
407	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	509	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
408	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	510	{
409	if (w->pid == pid || w->pid == -1)	511	/* make sure we are called again until all childs have been reaped */
410	{	512	event (EV_A_ (W)sw, EV_SIGNAL);
411	w->status = status;	513
412	event ((W)w, EV_CHILD);	514	child_reap (EV_A_ sw, pid, pid, status);
413	}	515	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		516	}
414	}	517	}
		518
		519	#endif
415		520
416	/*****************************************************************************/	521	/*****************************************************************************/
417		522
		523	#if EV_USE_KQUEUE
		524	# include "ev_kqueue.c"
		525	#endif
418	#if EV_USE_EPOLL	526	#if EV_USE_EPOLL
419	# include "ev_epoll.c"	527	# include "ev_epoll.c"
420	#endif	528	#endif
		529	#if EV_USE_POLL
		530	# include "ev_poll.c"
		531	#endif
421	#if EV_USE_SELECT	532	#if EV_USE_SELECT
422	# include "ev_select.c"	533	# include "ev_select.c"
423	#endif	534	#endif
424		535
425	int	536	int
…		…
432	ev_version_minor (void)	543	ev_version_minor (void)
433	{	544	{
434	return EV_VERSION_MINOR;	545	return EV_VERSION_MINOR;
435	}	546	}
436		547
437	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)
438	{	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	{
439	if (!ev_method)	569	if (!method)
440	{	570	{
441	#if EV_USE_MONOTONIC	571	#if EV_USE_MONOTONIC
442	{	572	{
443	struct timespec ts;	573	struct timespec ts;
444	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	574	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
445	have_monotonic = 1;	575	have_monotonic = 1;
446	}	576	}
447	#endif	577	#endif
448		578
449	ev_now = ev_time ();	579	rt_now = ev_time ();
450	now = get_clock ();	580	mn_now = get_clock ();
		581	now_floor = mn_now;
451	diff = ev_now - now;	582	rtmn_diff = rt_now - mn_now;
452		583
453	if (pipe (sigpipe))	584	if (methods == EVMETHOD_AUTO)
454	return 0;	585	if (!enable_secure () && getenv ("LIBEV_METHODS"))
455		586	methods = atoi (getenv ("LIBEV_METHODS"));
		587	else
456	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
457	#if EV_USE_EPOLL	594	#if EV_USE_EPOLL
458	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);
459	#endif	599	#endif
460	#if EV_USE_SELECT	600	#if EV_USE_SELECT
461	if (ev_method == EVMETHOD_NONE) select_init (flags);	601	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
462	#endif	602	#endif
		603	}
		604	}
463		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
464	if (ev_method)	693	if (ev_method (EV_A))
465	{	694	{
466	ev_watcher_init (&sigev, sigcb);	695	ev_watcher_init (&sigev, sigcb);
		696	ev_set_priority (&sigev, EV_MAXPRI);
467	siginit ();	697	siginit (EV_A);
468		698
		699	#ifndef WIN32
469	ev_signal_init (&childev, childcb, SIGCHLD);	700	ev_signal_init (&childev, childcb, SIGCHLD);
		701	ev_set_priority (&childev, EV_MAXPRI);
470	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
471	}	705	}
		706	else
		707	default_loop = 0;
472	}	708	}
473		709
474	return ev_method;	710	return default_loop;
475	}	711	}
476		712
477	/*****************************************************************************/
478
479	void	713	void
480	ev_prefork (void)	714	ev_default_destroy (void)
481	{	715	{
482	/* nop */	716	#if EV_MULTIPLICITY
483	}	717	struct ev_loop *loop = default_loop;
484
485	void
486	ev_postfork_parent (void)
487	{
488	/* nop */
489	}
490
491	void
492	ev_postfork_child (void)
493	{
494	#if EV_USE_EPOLL
495	if (ev_method == EVMETHOD_EPOLL)
496	epoll_postfork_child ();
497	#endif	718	#endif
498		719
		720	ev_ref (EV_A); /* child watcher */
		721	ev_signal_stop (EV_A_ &childev);
		722
		723	ev_ref (EV_A); /* signal watcher */
499	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);
500	close (sigpipe [0]);	738	close (sigpipe [0]);
501	close (sigpipe [1]);	739	close (sigpipe [1]);
502	pipe (sigpipe);	740	pipe (sigpipe);
		741
		742	ev_ref (EV_A); /* signal watcher */
503	siginit ();	743	siginit (EV_A);
504	}	744	}
505		745
506	/*****************************************************************************/	746	/*****************************************************************************/
507		747
508	static void	748	static void
509	call_pending (void)	749	call_pending (EV_P)
510	{	750	{
		751	int pri;
		752
		753	for (pri = NUMPRI; pri--; )
511	while (pendingcnt)	754	while (pendingcnt [pri])
512	{	755	{
513	ANPENDING *p = pendings + --pendingcnt;	756	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
514		757
515	if (p->w)	758	if (p->w)
516	{	759	{
517	p->w->pending = 0;	760	p->w->pending = 0;
518	p->w->cb (p->w, p->events);	761	p->w->cb (EV_A_ p->w, p->events);
519	}	762	}
520	}	763	}
521	}	764	}
522		765
523	static void	766	static void
524	timers_reify (void)	767	timers_reify (EV_P)
525	{	768	{
526	while (timercnt && timers [0]->at <= now)	769	while (timercnt && timers [0]->at <= mn_now)
527	{	770	{
528	struct ev_timer *w = timers [0];	771	struct ev_timer *w = timers [0];
529		772
530	/* first reschedule or stop timer */	773	/* first reschedule or stop timer */
531	if (w->repeat)	774	if (w->repeat)
532	{	775	{
		776	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
533	w->at = now + w->repeat;	777	w->at = mn_now + w->repeat;
534	assert (("timer timeout in the past, negative repeat?", w->at > now));
535	downheap ((WT *)timers, timercnt, 0);	778	downheap ((WT *)timers, timercnt, 0);
536	}	779	}
537	else	780	else
538	ev_timer_stop (w); /* nonrepeating: stop timer */	781	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
539		782
540	event ((W)w, EV_TIMEOUT);	783	event (EV_A_ (W)w, EV_TIMEOUT);
541	}	784	}
542	}	785	}
543		786
544	static void	787	static void
545	periodics_reify (void)	788	periodics_reify (EV_P)
546	{	789	{
547	while (periodiccnt && periodics [0]->at <= ev_now)	790	while (periodiccnt && periodics [0]->at <= rt_now)
548	{	791	{
549	struct ev_periodic *w = periodics [0];	792	struct ev_periodic *w = periodics [0];
550		793
551	/* first reschedule or stop timer */	794	/* first reschedule or stop timer */
552	if (w->interval)	795	if (w->interval)
553	{	796	{
554	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;
555	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));
556	downheap ((WT *)periodics, periodiccnt, 0);	799	downheap ((WT *)periodics, periodiccnt, 0);
557	}	800	}
558	else	801	else
559	ev_periodic_stop (w); /* nonrepeating: stop timer */	802	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
560		803
561	event ((W)w, EV_TIMEOUT);	804	event (EV_A_ (W)w, EV_PERIODIC);
562	}	805	}
563	}	806	}
564		807
565	static void	808	static void
566	periodics_reschedule (ev_tstamp diff)	809	periodics_reschedule (EV_P)
567	{	810	{
568	int i;	811	int i;
569		812
570	/* adjust periodics after time jump */	813	/* adjust periodics after time jump */
571	for (i = 0; i < periodiccnt; ++i)	814	for (i = 0; i < periodiccnt; ++i)
572	{	815	{
573	struct ev_periodic *w = periodics [i];	816	struct ev_periodic *w = periodics [i];
574		817
575	if (w->interval)	818	if (w->interval)
576	{	819	{
577	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;
578		821
579	if (fabs (diff) >= 1e-4)	822	if (fabs (diff) >= 1e-4)
580	{	823	{
581	ev_periodic_stop (w);	824	ev_periodic_stop (EV_A_ w);
582	ev_periodic_start (w);	825	ev_periodic_start (EV_A_ w);
583		826
584	i = 0; /* restart loop, inefficient, but time jumps should be rare */	827	i = 0; /* restart loop, inefficient, but time jumps should be rare */
585	}	828	}
586	}	829	}
587	}	830	}
588	}	831	}
589		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
590	static void	851	static void
591	time_update (void)	852	time_update (EV_P)
592	{	853	{
593	int i;	854	int i;
594		855
595	ev_now = ev_time ();	856	#if EV_USE_MONOTONIC
596
597	if (have_monotonic)	857	if (expect_true (have_monotonic))
598	{	858	{
599	ev_tstamp odiff = diff;	859	if (time_update_monotonic (EV_A))
600
601	for (i = 4; --i; ) /* loop a few times, before making important decisions */
602	{	860	{
603	now = get_clock ();	861	ev_tstamp odiff = rtmn_diff;
		862
		863	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		864	{
604	diff = ev_now - now;	865	rtmn_diff = rt_now - mn_now;
605		866
606	if (fabs (odiff - diff) < MIN_TIMEJUMP)	867	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
607	return; /* all is well */	868	return; /* all is well */
608		869
609	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) */
610	}	878	}
611
612	periodics_reschedule (diff - odiff);
613	/* no timer adjustment, as the monotonic clock doesn't jump */
614	}	879	}
615	else	880	else
		881	#endif
616	{	882	{
617	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))
618	{	886	{
619	periodics_reschedule (ev_now - now);	887	periodics_reschedule (EV_A);
620		888
621	/* 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 */
622	for (i = 0; i < timercnt; ++i)	890	for (i = 0; i < timercnt; ++i)
623	timers [i]->at += diff;	891	timers [i]->at += rt_now - mn_now;
624	}	892	}
625		893
626	now = ev_now;	894	mn_now = rt_now;
627	}	895	}
628	}	896	}
629		897
630	int ev_loop_done;	898	void
		899	ev_ref (EV_P)
		900	{
		901	++activecnt;
		902	}
631		903
		904	void
		905	ev_unref (EV_P)
		906	{
		907	--activecnt;
		908	}
		909
		910	static int loop_done;
		911
		912	void
632	void ev_loop (int flags)	913	ev_loop (EV_P_ int flags)
633	{	914	{
634	double block;	915	double block;
635	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	916	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
636		917
637	do	918	do
638	{	919	{
639	/* queue check watchers (and execute them) */	920	/* queue check watchers (and execute them) */
640	if (preparecnt)	921	if (expect_false (preparecnt))
641	{	922	{
642	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	923	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
643	call_pending ();	924	call_pending (EV_A);
644	}	925	}
645		926
646	/* update fd-related kernel structures */	927	/* update fd-related kernel structures */
647	fd_reify ();	928	fd_reify (EV_A);
648		929
649	/* calculate blocking time */	930	/* calculate blocking time */
650		931
651	/* 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
652	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	{
653	ev_now = ev_time ();	940	rt_now = ev_time ();
		941	mn_now = rt_now;
		942	}
654		943
655	if (flags & EVLOOP_NONBLOCK || idlecnt)	944	if (flags & EVLOOP_NONBLOCK || idlecnt)
656	block = 0.;	945	block = 0.;
657	else	946	else
658	{	947	{
659	block = MAX_BLOCKTIME;	948	block = MAX_BLOCKTIME;
660		949
661	if (timercnt)	950	if (timercnt)
662	{	951	{
663	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;
664	if (block > to) block = to;	953	if (block > to) block = to;
665	}	954	}
666		955
667	if (periodiccnt)	956	if (periodiccnt)
668	{	957	{
669	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	958	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
670	if (block > to) block = to;	959	if (block > to) block = to;
671	}	960	}
672		961
673	if (block < 0.) block = 0.;	962	if (block < 0.) block = 0.;
674	}	963	}
675		964
676	method_poll (block);	965	method_poll (EV_A_ block);
677		966
678	/* update ev_now, do magic */	967	/* update rt_now, do magic */
679	time_update ();	968	time_update (EV_A);
680		969
681	/* queue pending timers and reschedule them */	970	/* queue pending timers and reschedule them */
682	timers_reify (); /* relative timers called last */	971	timers_reify (EV_A); /* relative timers called last */
683	periodics_reify (); /* absolute timers called first */	972	periodics_reify (EV_A); /* absolute timers called first */
684		973
685	/* queue idle watchers unless io or timers are pending */	974	/* queue idle watchers unless io or timers are pending */
686	if (!pendingcnt)	975	if (!pendingcnt)
687	queue_events ((W *)idles, idlecnt, EV_IDLE);	976	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
688		977
689	/* queue check watchers, to be executed first */	978	/* queue check watchers, to be executed first */
690	if (checkcnt)	979	if (checkcnt)
691	queue_events ((W *)checks, checkcnt, EV_CHECK);	980	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
692		981
693	call_pending ();	982	call_pending (EV_A);
694	}	983	}
695	while (!ev_loop_done);	984	while (activecnt && !loop_done);
696		985
697	if (ev_loop_done != 2)	986	if (loop_done != 2)
698	ev_loop_done = 0;	987	loop_done = 0;
		988	}
		989
		990	void
		991	ev_unloop (EV_P_ int how)
		992	{
		993	loop_done = how;
699	}	994	}
700		995
701	/*****************************************************************************/	996	/*****************************************************************************/
702		997
703	static void	998	inline void
704	wlist_add (WL *head, WL elem)	999	wlist_add (WL *head, WL elem)
705	{	1000	{
706	elem->next = *head;	1001	elem->next = *head;
707	*head = elem;	1002	*head = elem;
708	}	1003	}
709		1004
710	static void	1005	inline void
711	wlist_del (WL *head, WL elem)	1006	wlist_del (WL *head, WL elem)
712	{	1007	{
713	while (*head)	1008	while (*head)
714	{	1009	{
715	if (*head == elem)	1010	if (*head == elem)
…		…
720		1015
721	head = &(*head)->next;	1016	head = &(*head)->next;
722	}	1017	}
723	}	1018	}
724		1019
725	static void	1020	inline void
726	ev_clear (W w)	1021	ev_clear_pending (EV_P_ W w)
727	{	1022	{
728	if (w->pending)	1023	if (w->pending)
729	{	1024	{
730	pendings [w->pending - 1].w = 0;	1025	pendings [ABSPRI (w)][w->pending - 1].w = 0;
731	w->pending = 0;	1026	w->pending = 0;
732	}	1027	}
733	}	1028	}
734		1029
735	static void	1030	inline void
736	ev_start (W w, int active)	1031	ev_start (EV_P_ W w, int active)
737	{	1032	{
		1033	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1034	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1035
738	w->active = active;	1036	w->active = active;
		1037	ev_ref (EV_A);
739	}	1038	}
740		1039
741	static void	1040	inline void
742	ev_stop (W w)	1041	ev_stop (EV_P_ W w)
743	{	1042	{
		1043	ev_unref (EV_A);
744	w->active = 0;	1044	w->active = 0;
745	}	1045	}
746		1046
747	/*****************************************************************************/	1047	/*****************************************************************************/
748		1048
749	void	1049	void
750	ev_io_start (struct ev_io *w)	1050	ev_io_start (EV_P_ struct ev_io *w)
751	{	1051	{
		1052	int fd = w->fd;
		1053
752	if (ev_is_active (w))	1054	if (ev_is_active (w))
753	return;	1055	return;
754		1056
755	int fd = w->fd;	1057	assert (("ev_io_start called with negative fd", fd >= 0));
756		1058
757	ev_start ((W)w, 1);	1059	ev_start (EV_A_ (W)w, 1);
758	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1060	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
759	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1061	wlist_add ((WL *)&anfds[fd].head, (WL)w);
760		1062
761	fd_change (fd);	1063	fd_change (EV_A_ fd);
762	}	1064	}
763		1065
764	void	1066	void
765	ev_io_stop (struct ev_io *w)	1067	ev_io_stop (EV_P_ struct ev_io *w)
766	{	1068	{
767	ev_clear ((W)w);	1069	ev_clear_pending (EV_A_ (W)w);
768	if (!ev_is_active (w))	1070	if (!ev_is_active (w))
769	return;	1071	return;
770		1072
771	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1073	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
772	ev_stop ((W)w);	1074	ev_stop (EV_A_ (W)w);
773		1075
774	fd_change (w->fd);	1076	fd_change (EV_A_ w->fd);
775	}	1077	}
776		1078
777	void	1079	void
778	ev_timer_start (struct ev_timer *w)	1080	ev_timer_start (EV_P_ struct ev_timer *w)
779	{	1081	{
780	if (ev_is_active (w))	1082	if (ev_is_active (w))
781	return;	1083	return;
782		1084
783	w->at += now;	1085	w->at += mn_now;
784		1086
785	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.));
786		1088
787	ev_start ((W)w, ++timercnt);	1089	ev_start (EV_A_ (W)w, ++timercnt);
788	array_needsize (timers, timermax, timercnt, );	1090	array_needsize (timers, timermax, timercnt, );
789	timers [timercnt - 1] = w;	1091	timers [timercnt - 1] = w;
790	upheap ((WT *)timers, timercnt - 1);	1092	upheap ((WT *)timers, timercnt - 1);
791	}	1093	}
792		1094
793	void	1095	void
794	ev_timer_stop (struct ev_timer *w)	1096	ev_timer_stop (EV_P_ struct ev_timer *w)
795	{	1097	{
796	ev_clear ((W)w);	1098	ev_clear_pending (EV_A_ (W)w);
797	if (!ev_is_active (w))	1099	if (!ev_is_active (w))
798	return;	1100	return;
799		1101
800	if (w->active < timercnt--)	1102	if (w->active < timercnt--)
801	{	1103	{
…		…
803	downheap ((WT *)timers, timercnt, w->active - 1);	1105	downheap ((WT *)timers, timercnt, w->active - 1);
804	}	1106	}
805		1107
806	w->at = w->repeat;	1108	w->at = w->repeat;
807		1109
808	ev_stop ((W)w);	1110	ev_stop (EV_A_ (W)w);
809	}	1111	}
810		1112
811	void	1113	void
812	ev_timer_again (struct ev_timer *w)	1114	ev_timer_again (EV_P_ struct ev_timer *w)
813	{	1115	{
814	if (ev_is_active (w))	1116	if (ev_is_active (w))
815	{	1117	{
816	if (w->repeat)	1118	if (w->repeat)
817	{	1119	{
818	w->at = now + w->repeat;	1120	w->at = mn_now + w->repeat;
819	downheap ((WT *)timers, timercnt, w->active - 1);	1121	downheap ((WT *)timers, timercnt, w->active - 1);
820	}	1122	}
821	else	1123	else
822	ev_timer_stop (w);	1124	ev_timer_stop (EV_A_ w);
823	}	1125	}
824	else if (w->repeat)	1126	else if (w->repeat)
825	ev_timer_start (w);	1127	ev_timer_start (EV_A_ w);
826	}	1128	}
827		1129
828	void	1130	void
829	ev_periodic_start (struct ev_periodic *w)	1131	ev_periodic_start (EV_P_ struct ev_periodic *w)
830	{	1132	{
831	if (ev_is_active (w))	1133	if (ev_is_active (w))
832	return;	1134	return;
833		1135
834	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.));
835		1137
836	/* 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 */
837	if (w->interval)	1139	if (w->interval)
838	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1140	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
839		1141
840	ev_start ((W)w, ++periodiccnt);	1142	ev_start (EV_A_ (W)w, ++periodiccnt);
841	array_needsize (periodics, periodicmax, periodiccnt, );	1143	array_needsize (periodics, periodicmax, periodiccnt, );
842	periodics [periodiccnt - 1] = w;	1144	periodics [periodiccnt - 1] = w;
843	upheap ((WT *)periodics, periodiccnt - 1);	1145	upheap ((WT *)periodics, periodiccnt - 1);
844	}	1146	}
845		1147
846	void	1148	void
847	ev_periodic_stop (struct ev_periodic *w)	1149	ev_periodic_stop (EV_P_ struct ev_periodic *w)
848	{	1150	{
849	ev_clear ((W)w);	1151	ev_clear_pending (EV_A_ (W)w);
850	if (!ev_is_active (w))	1152	if (!ev_is_active (w))
851	return;	1153	return;
852		1154
853	if (w->active < periodiccnt--)	1155	if (w->active < periodiccnt--)
854	{	1156	{
855	periodics [w->active - 1] = periodics [periodiccnt];	1157	periodics [w->active - 1] = periodics [periodiccnt];
856	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1158	downheap ((WT *)periodics, periodiccnt, w->active - 1);
857	}	1159	}
858		1160
859	ev_stop ((W)w);	1161	ev_stop (EV_A_ (W)w);
860	}	1162	}
861		1163
862	void	1164	void
863	ev_signal_start (struct ev_signal *w)	1165	ev_idle_start (EV_P_ struct ev_idle *w)
864	{	1166	{
865	if (ev_is_active (w))	1167	if (ev_is_active (w))
866	return;	1168	return;
867		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
868	ev_start ((W)w, 1);	1245	ev_start (EV_A_ (W)w, 1);
869	array_needsize (signals, signalmax, w->signum, signals_init);	1246	array_needsize (signals, signalmax, w->signum, signals_init);
870	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1247	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
871		1248
872	if (!w->next)	1249	if (!w->next)
873	{	1250	{
874	struct sigaction sa;	1251	struct sigaction sa;
875	sa.sa_handler = sighandler;	1252	sa.sa_handler = sighandler;
876	sigfillset (&sa.sa_mask);	1253	sigfillset (&sa.sa_mask);
877	sa.sa_flags = 0;	1254	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
878	sigaction (w->signum, &sa, 0);	1255	sigaction (w->signum, &sa, 0);
879	}	1256	}
880	}	1257	}
881		1258
882	void	1259	void
883	ev_signal_stop (struct ev_signal *w)	1260	ev_signal_stop (EV_P_ struct ev_signal *w)
884	{	1261	{
885	ev_clear ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
886	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
887	return;	1264	return;
888		1265
889	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1266	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
890	ev_stop ((W)w);	1267	ev_stop (EV_A_ (W)w);
891		1268
892	if (!signals [w->signum - 1].head)	1269	if (!signals [w->signum - 1].head)
893	signal (w->signum, SIG_DFL);	1270	signal (w->signum, SIG_DFL);
894	}	1271	}
895		1272
896	void	1273	void
897	ev_idle_start (struct ev_idle *w)	1274	ev_child_start (EV_P_ struct ev_child *w)
898	{	1275	{
		1276	#if EV_MULTIPLICITY
		1277	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1278	#endif
899	if (ev_is_active (w))	1279	if (ev_is_active (w))
900	return;	1280	return;
901		1281
902	ev_start ((W)w, ++idlecnt);	1282	ev_start (EV_A_ (W)w, 1);
903	array_needsize (idles, idlemax, idlecnt, );	1283	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
904	idles [idlecnt - 1] = w;
905	}	1284	}
906		1285
907	void	1286	void
908	ev_idle_stop (struct ev_idle *w)	1287	ev_child_stop (EV_P_ struct ev_child *w)
909	{	1288	{
910	ev_clear ((W)w);	1289	ev_clear_pending (EV_A_ (W)w);
911	if (ev_is_active (w))	1290	if (ev_is_active (w))
912	return;	1291	return;
913		1292
914	idles [w->active - 1] = idles [--idlecnt];
915	ev_stop ((W)w);
916	}
917
918	void
919	ev_prepare_start (struct ev_prepare *w)
920	{
921	if (ev_is_active (w))
922	return;
923
924	ev_start ((W)w, ++preparecnt);
925	array_needsize (prepares, preparemax, preparecnt, );
926	prepares [preparecnt - 1] = w;
927	}
928
929	void
930	ev_prepare_stop (struct ev_prepare *w)
931	{
932	ev_clear ((W)w);
933	if (ev_is_active (w))
934	return;
935
936	prepares [w->active - 1] = prepares [--preparecnt];
937	ev_stop ((W)w);
938	}
939
940	void
941	ev_check_start (struct ev_check *w)
942	{
943	if (ev_is_active (w))
944	return;
945
946	ev_start ((W)w, ++checkcnt);
947	array_needsize (checks, checkmax, checkcnt, );
948	checks [checkcnt - 1] = w;
949	}
950
951	void
952	ev_check_stop (struct ev_check *w)
953	{
954	ev_clear ((W)w);
955	if (ev_is_active (w))
956	return;
957
958	checks [w->active - 1] = checks [--checkcnt];
959	ev_stop ((W)w);
960	}
961
962	void
963	ev_child_start (struct ev_child *w)
964	{
965	if (ev_is_active (w))
966	return;
967
968	ev_start ((W)w, 1);
969	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
970	}
971
972	void
973	ev_child_stop (struct ev_child *w)
974	{
975	ev_clear ((W)w);
976	if (ev_is_active (w))
977	return;
978
979	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1293	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
980	ev_stop ((W)w);	1294	ev_stop (EV_A_ (W)w);
981	}	1295	}
982		1296
983	/*****************************************************************************/	1297	/*****************************************************************************/
984		1298
985	struct ev_once	1299	struct ev_once
…		…
989	void (*cb)(int revents, void *arg);	1303	void (*cb)(int revents, void *arg);
990	void *arg;	1304	void *arg;
991	};	1305	};
992		1306
993	static void	1307	static void
994	once_cb (struct ev_once *once, int revents)	1308	once_cb (EV_P_ struct ev_once *once, int revents)
995	{	1309	{
996	void (*cb)(int revents, void *arg) = once->cb;	1310	void (*cb)(int revents, void *arg) = once->cb;
997	void *arg = once->arg;	1311	void *arg = once->arg;
998		1312
999	ev_io_stop (&once->io);	1313	ev_io_stop (EV_A_ &once->io);
1000	ev_timer_stop (&once->to);	1314	ev_timer_stop (EV_A_ &once->to);
1001	free (once);	1315	free (once);
1002		1316
1003	cb (revents, arg);	1317	cb (revents, arg);
1004	}	1318	}
1005		1319
1006	static void	1320	static void
1007	once_cb_io (struct ev_io *w, int revents)	1321	once_cb_io (EV_P_ struct ev_io *w, int revents)
1008	{	1322	{
1009	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);
1010	}	1324	}
1011		1325
1012	static void	1326	static void
1013	once_cb_to (struct ev_timer *w, int revents)	1327	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1014	{	1328	{
1015	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);
1016	}	1330	}
1017		1331
1018	void	1332	void
1019	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)
1020	{	1334	{
1021	struct ev_once *once = malloc (sizeof (struct ev_once));	1335	struct ev_once *once = malloc (sizeof (struct ev_once));
1022		1336
1023	if (!once)	1337	if (!once)
1024	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1338	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1029		1343
1030	ev_watcher_init (&once->io, once_cb_io);	1344	ev_watcher_init (&once->io, once_cb_io);
1031	if (fd >= 0)	1345	if (fd >= 0)
1032	{	1346	{
1033	ev_io_set (&once->io, fd, events);	1347	ev_io_set (&once->io, fd, events);
1034	ev_io_start (&once->io);	1348	ev_io_start (EV_A_ &once->io);
1035	}	1349	}
1036		1350
1037	ev_watcher_init (&once->to, once_cb_to);	1351	ev_watcher_init (&once->to, once_cb_to);
1038	if (timeout >= 0.)	1352	if (timeout >= 0.)
1039	{	1353	{
1040	ev_timer_set (&once->to, timeout, 0.);	1354	ev_timer_set (&once->to, timeout, 0.);
1041	ev_timer_start (&once->to);	1355	ev_timer_start (EV_A_ &once->to);
1042	}	1356	}
1043	}	1357	}
1044	}	1358	}
1045		1359
1046	/*****************************************************************************/
1047
1048	#if 0
1049
1050	struct ev_io wio;
1051
1052	static void
1053	sin_cb (struct ev_io *w, int revents)
1054	{
1055	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1056	}
1057
1058	static void
1059	ocb (struct ev_timer *w, int revents)
1060	{
1061	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1062	ev_timer_stop (w);
1063	ev_timer_start (w);
1064	}
1065
1066	static void
1067	scb (struct ev_signal *w, int revents)
1068	{
1069	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1070	ev_io_stop (&wio);
1071	ev_io_start (&wio);
1072	}
1073
1074	static void
1075	gcb (struct ev_signal *w, int revents)
1076	{
1077	fprintf (stderr, "generic %x\n", revents);
1078
1079	}
1080
1081	int main (void)
1082	{
1083	ev_init (0);
1084
1085	ev_io_init (&wio, sin_cb, 0, EV_READ);
1086	ev_io_start (&wio);
1087
1088	struct ev_timer t[10000];
1089
1090	#if 0
1091	int i;
1092	for (i = 0; i < 10000; ++i)
1093	{
1094	struct ev_timer *w = t + i;
1095	ev_watcher_init (w, ocb, i);
1096	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1097	ev_timer_start (w);
1098	if (drand48 () < 0.5)
1099	ev_timer_stop (w);
1100	}
1101	#endif
1102
1103	struct ev_timer t1;
1104	ev_timer_init (&t1, ocb, 5, 10);
1105	ev_timer_start (&t1);
1106
1107	struct ev_signal sig;
1108	ev_signal_init (&sig, scb, SIGQUIT);
1109	ev_signal_start (&sig);
1110
1111	struct ev_check cw;
1112	ev_check_init (&cw, gcb);
1113	ev_check_start (&cw);
1114
1115	struct ev_idle iw;
1116	ev_idle_init (&iw, gcb);
1117	ev_idle_start (&iw);
1118
1119	ev_loop (0);
1120
1121	return 0;
1122	}
1123
1124	#endif
1125
1126
1127
1128

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