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Comparing libev/ev.c (file contents):
Revision 1.41 by root, Fri Nov 2 16:54:34 2007 UTC vs.
Revision 1.56 by root, Sun Nov 4 15:58:49 2007 UTC

…		…
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY	26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT	27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (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
29	* 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.
30	*/	30	*/
31	#if EV_USE_CONFIG_H	31	#ifndef EV_STANDALONE
32	# include "config.h"	32	# include "config.h"
33	#endif	33	#endif
34		34
35	#include <math.h>	35	#include <math.h>
36	#include <stdlib.h>	36	#include <stdlib.h>
…		…
42	#include <stdio.h>	42	#include <stdio.h>
43		43
44	#include <assert.h>	44	#include <assert.h>
45	#include <errno.h>	45	#include <errno.h>
46	#include <sys/types.h>	46	#include <sys/types.h>
		47	#ifndef WIN32
47	#include <sys/wait.h>	48	# include <sys/wait.h>
		49	#endif
48	#include <sys/time.h>	50	#include <sys/time.h>
49	#include <time.h>	51	#include <time.h>
50		52
51	/**/	53	/**/
52		54
…		…
56		58
57	#ifndef EV_USE_SELECT	59	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	60	# define EV_USE_SELECT 1
59	#endif	61	#endif
60		62
61	#ifndef EV_USE_POLL	63	#ifndef EV_USEV_POLL
62	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	64	# define EV_USEV_POLL 0 /* poll is usually slower than select, and not as well tested */
63	#endif	65	#endif
64		66
65	#ifndef EV_USE_EPOLL	67	#ifndef EV_USE_EPOLL
66	# define EV_USE_EPOLL 0	68	# define EV_USE_EPOLL 0
		69	#endif
		70
		71	#ifndef EV_USE_KQUEUE
		72	# define EV_USE_KQUEUE 0
67	#endif	73	#endif
68		74
69	#ifndef EV_USE_REALTIME	75	#ifndef EV_USE_REALTIME
70	# define EV_USE_REALTIME 1	76	# define EV_USE_REALTIME 1
71	#endif	77	#endif
…		…
100	#endif	106	#endif
101		107
102	#define expect_false(expr) expect ((expr) != 0, 0)	108	#define expect_false(expr) expect ((expr) != 0, 0)
103	#define expect_true(expr) expect ((expr) != 0, 1)	109	#define expect_true(expr) expect ((expr) != 0, 1)
104		110
		111	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		112	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		113
105	typedef struct ev_watcher *W;	114	typedef struct ev_watcher *W;
106	typedef struct ev_watcher_list *WL;	115	typedef struct ev_watcher_list *WL;
107	typedef struct ev_watcher_time *WT;	116	typedef struct ev_watcher_time *WT;
108		117
109	static ev_tstamp now_floor, now, diff; /* monotonic clock */	118	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
110	ev_tstamp ev_now;
111	int ev_method;
112
113	static int have_monotonic; /* runtime */
114
115	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
116	static void (*method_modify)(int fd, int oev, int nev);
117	static void (*method_poll)(ev_tstamp timeout);
118		119
119	/*****************************************************************************/	120	/*****************************************************************************/
120		121
121	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
122	ev_time (void)	156	ev_time (void)
123	{	157	{
124	#if EV_USE_REALTIME	158	#if EV_USE_REALTIME
125	struct timespec ts;	159	struct timespec ts;
126	clock_gettime (CLOCK_REALTIME, &ts);	160	clock_gettime (CLOCK_REALTIME, &ts);
…		…
130	gettimeofday (&tv, 0);	164	gettimeofday (&tv, 0);
131	return tv.tv_sec + tv.tv_usec * 1e-6;	165	return tv.tv_sec + tv.tv_usec * 1e-6;
132	#endif	166	#endif
133	}	167	}
134		168
135	static ev_tstamp	169	inline ev_tstamp
136	get_clock (void)	170	get_clock (void)
137	{	171	{
138	#if EV_USE_MONOTONIC	172	#if EV_USE_MONOTONIC
139	if (expect_true (have_monotonic))	173	if (expect_true (have_monotonic))
140	{	174	{
…		…
143	return ts.tv_sec + ts.tv_nsec * 1e-9;	177	return ts.tv_sec + ts.tv_nsec * 1e-9;
144	}	178	}
145	#endif	179	#endif
146		180
147	return ev_time ();	181	return ev_time ();
		182	}
		183
		184	ev_tstamp
		185	ev_now (EV_P)
		186	{
		187	return rt_now;
148	}	188	}
149		189
150	#define array_roundsize(base,n) ((n) | 4 & ~3)	190	#define array_roundsize(base,n) ((n) | 4 & ~3)
151		191
152	#define array_needsize(base,cur,cnt,init) \	192	#define array_needsize(base,cur,cnt,init) \
…		…
164	cur = newcnt; \	204	cur = newcnt; \
165	}	205	}
166		206
167	/*****************************************************************************/	207	/*****************************************************************************/
168		208
169	typedef struct
170	{
171	struct ev_io *head;
172	unsigned char events;
173	unsigned char reify;
174	} ANFD;
175
176	static ANFD *anfds;
177	static int anfdmax;
178
179	static void	209	static void
180	anfds_init (ANFD *base, int count)	210	anfds_init (ANFD *base, int count)
181	{	211	{
182	while (count--)	212	while (count--)
183	{	213	{
…		…
187		217
188	++base;	218	++base;
189	}	219	}
190	}	220	}
191		221
192	typedef struct
193	{
194	W w;
195	int events;
196	} ANPENDING;
197
198	static ANPENDING *pendings;
199	static int pendingmax, pendingcnt;
200
201	static void	222	static void
202	event (W w, int events)	223	event (EV_P_ W w, int events)
203	{	224	{
204	if (w->pending)	225	if (w->pending)
205	{	226	{
206	pendings [w->pending - 1].events |= events;	227	pendings [ABSPRI (w)][w->pending - 1].events |= events;
207	return;	228	return;
208	}	229	}
209		230
210	w->pending = ++pendingcnt;	231	w->pending = ++pendingcnt [ABSPRI (w)];
211	array_needsize (pendings, pendingmax, pendingcnt, );	232	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
212	pendings [pendingcnt - 1].w = w;	233	pendings [ABSPRI (w)][w->pending - 1].w = w;
213	pendings [pendingcnt - 1].events = events;	234	pendings [ABSPRI (w)][w->pending - 1].events = events;
214	}	235	}
215		236
216	static void	237	static void
217	queue_events (W *events, int eventcnt, int type)	238	queue_events (EV_P_ W *events, int eventcnt, int type)
218	{	239	{
219	int i;	240	int i;
220		241
221	for (i = 0; i < eventcnt; ++i)	242	for (i = 0; i < eventcnt; ++i)
222	event (events [i], type);	243	event (EV_A_ events [i], type);
223	}	244	}
224		245
225	static void	246	static void
226	fd_event (int fd, int events)	247	fd_event (EV_P_ int fd, int events)
227	{	248	{
228	ANFD *anfd = anfds + fd;	249	ANFD *anfd = anfds + fd;
229	struct ev_io *w;	250	struct ev_io *w;
230		251
231	for (w = anfd->head; w; w = w->next)	252	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
232	{	253	{
233	int ev = w->events & events;	254	int ev = w->events & events;
234		255
235	if (ev)	256	if (ev)
236	event ((W)w, ev);	257	event (EV_A_ (W)w, ev);
237	}	258	}
238	}	259	}
239		260
240	/*****************************************************************************/	261	/*****************************************************************************/
241		262
242	static int *fdchanges;
243	static int fdchangemax, fdchangecnt;
244
245	static void	263	static void
246	fd_reify (void)	264	fd_reify (EV_P)
247	{	265	{
248	int i;	266	int i;
249		267
250	for (i = 0; i < fdchangecnt; ++i)	268	for (i = 0; i < fdchangecnt; ++i)
251	{	269	{
…		…
253	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
254	struct ev_io *w;	272	struct ev_io *w;
255		273
256	int events = 0;	274	int events = 0;
257		275
258	for (w = anfd->head; w; w = w->next)	276	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
259	events |= w->events;	277	events |= w->events;
260		278
261	anfd->reify = 0;	279	anfd->reify = 0;
262		280
263	if (anfd->events != events)	281	if (anfd->events != events)
264	{	282	{
265	method_modify (fd, anfd->events, events);	283	method_modify (EV_A_ fd, anfd->events, events);
266	anfd->events = events;	284	anfd->events = events;
267	}	285	}
268	}	286	}
269		287
270	fdchangecnt = 0;	288	fdchangecnt = 0;
271	}	289	}
272		290
273	static void	291	static void
274	fd_change (int fd)	292	fd_change (EV_P_ int fd)
275	{	293	{
276	if (anfds [fd].reify || fdchangecnt < 0)	294	if (anfds [fd].reify || fdchangecnt < 0)
277	return;	295	return;
278		296
279	anfds [fd].reify = 1;	297	anfds [fd].reify = 1;
…		…
282	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	300	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
283	fdchanges [fdchangecnt - 1] = fd;	301	fdchanges [fdchangecnt - 1] = fd;
284	}	302	}
285		303
286	static void	304	static void
287	fd_kill (int fd)	305	fd_kill (EV_P_ int fd)
288	{	306	{
289	struct ev_io *w;	307	struct ev_io *w;
290		308
291	printf ("killing fd %d\n", fd);//D
292	while ((w = anfds [fd].head))	309	while ((w = (struct ev_io *)anfds [fd].head))
293	{	310	{
294	ev_io_stop (w);	311	ev_io_stop (EV_A_ w);
295	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	312	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
296	}	313	}
297	}	314	}
298		315
299	/* called on EBADF to verify fds */	316	/* called on EBADF to verify fds */
300	static void	317	static void
301	fd_ebadf (void)	318	fd_ebadf (EV_P)
302	{	319	{
303	int fd;	320	int fd;
304		321
305	for (fd = 0; fd < anfdmax; ++fd)	322	for (fd = 0; fd < anfdmax; ++fd)
306	if (anfds [fd].events)	323	if (anfds [fd].events)
307	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	324	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
308	fd_kill (fd);	325	fd_kill (EV_A_ fd);
309	}	326	}
310		327
311	/* called on ENOMEM in select/poll to kill some fds and retry */	328	/* called on ENOMEM in select/poll to kill some fds and retry */
312	static void	329	static void
313	fd_enomem (void)	330	fd_enomem (EV_P)
314	{	331	{
315	int fd = anfdmax;	332	int fd = anfdmax;
316		333
317	while (fd--)	334	while (fd--)
318	if (anfds [fd].events)	335	if (anfds [fd].events)
319	{	336	{
320	close (fd);	337	close (fd);
321	fd_kill (fd);	338	fd_kill (EV_A_ fd);
322	return;	339	return;
323	}	340	}
324	}	341	}
325		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	}
		356	}
		357
326	/*****************************************************************************/	358	/*****************************************************************************/
327		359
328	static struct ev_timer **timers;
329	static int timermax, timercnt;
330
331	static struct ev_periodic **periodics;
332	static int periodicmax, periodiccnt;
333
334	static void	360	static void
335	upheap (WT *timers, int k)	361	upheap (WT *heap, int k)
336	{	362	{
337	WT w = timers [k];	363	WT w = heap [k];
338		364
339	while (k && timers [k >> 1]->at > w->at)	365	while (k && heap [k >> 1]->at > w->at)
340	{	366	{
341	timers [k] = timers [k >> 1];	367	heap [k] = heap [k >> 1];
342	timers [k]->active = k + 1;	368	heap [k]->active = k + 1;
343	k >>= 1;	369	k >>= 1;
344	}	370	}
345		371
346	timers [k] = w;	372	heap [k] = w;
347	timers [k]->active = k + 1;	373	heap [k]->active = k + 1;
348		374
349	}	375	}
350		376
351	static void	377	static void
352	downheap (WT *timers, int N, int k)	378	downheap (WT *heap, int N, int k)
353	{	379	{
354	WT w = timers [k];	380	WT w = heap [k];
355		381
356	while (k < (N >> 1))	382	while (k < (N >> 1))
357	{	383	{
358	int j = k << 1;	384	int j = k << 1;
359		385
360	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	386	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
361	++j;	387	++j;
362		388
363	if (w->at <= timers [j]->at)	389	if (w->at <= heap [j]->at)
364	break;	390	break;
365		391
366	timers [k] = timers [j];	392	heap [k] = heap [j];
367	timers [k]->active = k + 1;	393	heap [k]->active = k + 1;
368	k = j;	394	k = j;
369	}	395	}
370		396
371	timers [k] = w;	397	heap [k] = w;
372	timers [k]->active = k + 1;	398	heap [k]->active = k + 1;
373	}	399	}
374		400
375	/*****************************************************************************/	401	/*****************************************************************************/
376		402
377	typedef struct	403	typedef struct
378	{	404	{
379	struct ev_signal *head;	405	struct ev_watcher_list *head;
380	sig_atomic_t volatile gotsig;	406	sig_atomic_t volatile gotsig;
381	} ANSIG;	407	} ANSIG;
382		408
383	static ANSIG *signals;	409	static ANSIG *signals;
384	static int signalmax;	410	static int signalmax;
385		411
386	static int sigpipe [2];	412	static int sigpipe [2];
387	static sig_atomic_t volatile gotsig;	413	static sig_atomic_t volatile gotsig;
388	static struct ev_io sigev;
389		414
390	static void	415	static void
391	signals_init (ANSIG *base, int count)	416	signals_init (ANSIG *base, int count)
392	{	417	{
393	while (count--)	418	while (count--)
…		…
404	{	429	{
405	signals [signum - 1].gotsig = 1;	430	signals [signum - 1].gotsig = 1;
406		431
407	if (!gotsig)	432	if (!gotsig)
408	{	433	{
		434	int old_errno = errno;
409	gotsig = 1;	435	gotsig = 1;
410	write (sigpipe [1], &signum, 1);	436	write (sigpipe [1], &signum, 1);
		437	errno = old_errno;
411	}	438	}
412	}	439	}
413		440
414	static void	441	static void
415	sigcb (struct ev_io *iow, int revents)	442	sigcb (EV_P_ struct ev_io *iow, int revents)
416	{	443	{
417	struct ev_signal *w;	444	struct ev_watcher_list *w;
418	int signum;	445	int signum;
419		446
420	read (sigpipe [0], &revents, 1);	447	read (sigpipe [0], &revents, 1);
421	gotsig = 0;	448	gotsig = 0;
422		449
…		…
424	if (signals [signum].gotsig)	451	if (signals [signum].gotsig)
425	{	452	{
426	signals [signum].gotsig = 0;	453	signals [signum].gotsig = 0;
427		454
428	for (w = signals [signum].head; w; w = w->next)	455	for (w = signals [signum].head; w; w = w->next)
429	event ((W)w, EV_SIGNAL);	456	event (EV_A_ (W)w, EV_SIGNAL);
430	}	457	}
431	}	458	}
432		459
433	static void	460	static void
434	siginit (void)	461	siginit (EV_P)
435	{	462	{
		463	#ifndef WIN32
436	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	464	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
437	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	465	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
438		466
439	/* rather than sort out wether we really need nb, set it */	467	/* rather than sort out wether we really need nb, set it */
440	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	468	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
441	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	469	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		470	#endif
442		471
443	ev_io_set (&sigev, sigpipe [0], EV_READ);	472	ev_io_set (&sigev, sigpipe [0], EV_READ);
444	ev_io_start (&sigev);	473	ev_io_start (EV_A_ &sigev);
		474	ev_unref (EV_A); /* child watcher should not keep loop alive */
445	}	475	}
446		476
447	/*****************************************************************************/	477	/*****************************************************************************/
448		478
449	static struct ev_idle **idles;	479	#ifndef WIN32
450	static int idlemax, idlecnt;
451
452	static struct ev_prepare **prepares;
453	static int preparemax, preparecnt;
454
455	static struct ev_check **checks;
456	static int checkmax, checkcnt;
457
458	/*****************************************************************************/
459
460	static struct ev_child *childs [PID_HASHSIZE];
461	static struct ev_signal childev;
462		480
463	#ifndef WCONTINUED	481	#ifndef WCONTINUED
464	# define WCONTINUED 0	482	# define WCONTINUED 0
465	#endif	483	#endif
466		484
467	static void	485	static void
468	childcb (struct ev_signal *sw, int revents)	486	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
469	{	487	{
470	struct ev_child *w;	488	struct ev_child *w;
		489
		490	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
		491	if (w->pid == pid || !w->pid)
		492	{
		493	w->priority = sw->priority; /* need to do it *now* */
		494	w->rpid = pid;
		495	w->rstatus = status;
		496	event (EV_A_ (W)w, EV_CHILD);
		497	}
		498	}
		499
		500	static void
		501	childcb (EV_P_ struct ev_signal *sw, int revents)
		502	{
471	int pid, status;	503	int pid, status;
472		504
473	while ((pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)) != -1)	505	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
474	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	506	{
475	if (w->pid == pid || !w->pid)	507	/* make sure we are called again until all childs have been reaped */
476	{	508	event (EV_A_ (W)sw, EV_SIGNAL);
477	w->status = status;	509
478	event ((W)w, EV_CHILD);	510	child_reap (EV_A_ sw, pid, pid, status);
479	}	511	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		512	}
480	}	513	}
		514
		515	#endif
481		516
482	/*****************************************************************************/	517	/*****************************************************************************/
483		518
		519	#if EV_USE_KQUEUE
		520	# include "ev_kqueue.c"
		521	#endif
484	#if EV_USE_EPOLL	522	#if EV_USE_EPOLL
485	# include "ev_epoll.c"	523	# include "ev_epoll.c"
486	#endif	524	#endif
487	#if EV_USE_POLL	525	#if EV_USEV_POLL
488	# include "ev_poll.c"	526	# include "ev_poll.c"
489	#endif	527	#endif
490	#if EV_USE_SELECT	528	#if EV_USE_SELECT
491	# include "ev_select.c"	529	# include "ev_select.c"
492	#endif	530	#endif
…		…
501	ev_version_minor (void)	539	ev_version_minor (void)
502	{	540	{
503	return EV_VERSION_MINOR;	541	return EV_VERSION_MINOR;
504	}	542	}
505		543
506	/* return true if we are running with elevated privileges and ignore env variables */	544	/* return true if we are running with elevated privileges and should ignore env variables */
507	static int	545	static int
508	enable_secure ()	546	enable_secure (void)
509	{	547	{
		548	#ifdef WIN32
		549	return 0;
		550	#else
510	return getuid () != geteuid ()	551	return getuid () != geteuid ()
511	|| getgid () != getegid ();	552	|| getgid () != getegid ();
		553	#endif
512	}	554	}
513		555
514	int ev_init (int methods)	556	int
		557	ev_method (EV_P)
515	{	558	{
		559	return method;
		560	}
		561
		562	static void
		563	loop_init (EV_P_ int methods)
		564	{
516	if (!ev_method)	565	if (!method)
517	{	566	{
518	#if EV_USE_MONOTONIC	567	#if EV_USE_MONOTONIC
519	{	568	{
520	struct timespec ts;	569	struct timespec ts;
521	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	570	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
522	have_monotonic = 1;	571	have_monotonic = 1;
523	}	572	}
524	#endif	573	#endif
525		574
526	ev_now = ev_time ();	575	rt_now = ev_time ();
527	now = get_clock ();	576	mn_now = get_clock ();
528	now_floor = now;	577	now_floor = mn_now;
529	diff = ev_now - now;	578	rtmn_diff = rt_now - mn_now;
530
531	if (pipe (sigpipe))
532	return 0;
533		579
534	if (methods == EVMETHOD_AUTO)	580	if (methods == EVMETHOD_AUTO)
535	if (!enable_secure () && getenv ("LIBEV_METHODS"))	581	if (!enable_secure () && getenv ("LIBEV_METHODS"))
536	methods = atoi (getenv ("LIBEV_METHODS"));	582	methods = atoi (getenv ("LIBEV_METHODS"));
537	else	583	else
538	methods = EVMETHOD_ANY;	584	methods = EVMETHOD_ANY;
539		585
540	ev_method = 0;	586	method = 0;
		587	#if EV_USE_KQUEUE
		588	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		589	#endif
541	#if EV_USE_EPOLL	590	#if EV_USE_EPOLL
542	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	591	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
543	#endif	592	#endif
544	#if EV_USE_POLL	593	#if EV_USEV_POLL
545	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	594	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
546	#endif	595	#endif
547	#if EV_USE_SELECT	596	#if EV_USE_SELECT
548	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	597	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
549	#endif	598	#endif
		599	}
		600	}
550		601
		602	void
		603	loop_destroy (EV_P)
		604	{
		605	#if EV_USE_KQUEUE
		606	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		607	#endif
		608	#if EV_USE_EPOLL
		609	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		610	#endif
		611	#if EV_USEV_POLL
		612	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		613	#endif
		614	#if EV_USE_SELECT
		615	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		616	#endif
		617
		618	method = 0;
		619	/*TODO*/
		620	}
		621
		622	void
		623	loop_fork (EV_P)
		624	{
		625	/*TODO*/
		626	#if EV_USE_EPOLL
		627	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		628	#endif
		629	#if EV_USE_KQUEUE
		630	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		631	#endif
		632	}
		633
		634	#if EV_MULTIPLICITY
		635	struct ev_loop *
		636	ev_loop_new (int methods)
		637	{
		638	struct ev_loop *loop = (struct ev_loop *)calloc (1, sizeof (struct ev_loop));
		639
		640	loop_init (EV_A_ methods);
		641
		642	if (ev_methods (EV_A))
		643	return loop;
		644
		645	return 0;
		646	}
		647
		648	void
		649	ev_loop_destroy (EV_P)
		650	{
		651	loop_destroy (EV_A);
		652	free (loop);
		653	}
		654
		655	void
		656	ev_loop_fork (EV_P)
		657	{
		658	loop_fork (EV_A);
		659	}
		660
		661	#endif
		662
		663	#if EV_MULTIPLICITY
		664	struct ev_loop default_loop_struct;
		665	static struct ev_loop *default_loop;
		666
		667	struct ev_loop *
		668	#else
		669	static int default_loop;
		670
		671	int
		672	#endif
		673	ev_default_loop (int methods)
		674	{
		675	if (sigpipe [0] == sigpipe [1])
		676	if (pipe (sigpipe))
		677	return 0;
		678
		679	if (!default_loop)
		680	{
		681	#if EV_MULTIPLICITY
		682	struct ev_loop *loop = default_loop = &default_loop_struct;
		683	#else
		684	default_loop = 1;
		685	#endif
		686
		687	loop_init (EV_A_ methods);
		688
551	if (ev_method)	689	if (ev_method (EV_A))
552	{	690	{
553	ev_watcher_init (&sigev, sigcb);	691	ev_watcher_init (&sigev, sigcb);
		692	ev_set_priority (&sigev, EV_MAXPRI);
554	siginit ();	693	siginit (EV_A);
555		694
		695	#ifndef WIN32
556	ev_signal_init (&childev, childcb, SIGCHLD);	696	ev_signal_init (&childev, childcb, SIGCHLD);
		697	ev_set_priority (&childev, EV_MAXPRI);
557	ev_signal_start (&childev);	698	ev_signal_start (EV_A_ &childev);
		699	ev_unref (EV_A); /* child watcher should not keep loop alive */
		700	#endif
558	}	701	}
		702	else
		703	default_loop = 0;
559	}	704	}
560		705
561	return ev_method;	706	return default_loop;
562	}	707	}
563		708
564	/*****************************************************************************/
565
566	void	709	void
567	ev_fork_prepare (void)	710	ev_default_destroy (void)
568	{	711	{
569	/* nop */	712	struct ev_loop *loop = default_loop;
570	}
571		713
572	void	714	ev_ref (EV_A); /* child watcher */
573	ev_fork_parent (void)	715	ev_signal_stop (EV_A_ &childev);
574	{
575	/* nop */
576	}
577		716
578	void	717	ev_ref (EV_A); /* signal watcher */
579	ev_fork_child (void)
580	{
581	#if EV_USE_EPOLL
582	if (ev_method == EVMETHOD_EPOLL)
583	epoll_postfork_child ();
584	#endif
585
586	ev_io_stop (&sigev);	718	ev_io_stop (EV_A_ &sigev);
		719
		720	close (sigpipe [0]); sigpipe [0] = 0;
		721	close (sigpipe [1]); sigpipe [1] = 0;
		722
		723	loop_destroy (EV_A);
		724	}
		725
		726	void
		727	ev_default_fork (EV_P)
		728	{
		729	loop_fork (EV_A);
		730
		731	ev_io_stop (EV_A_ &sigev);
587	close (sigpipe [0]);	732	close (sigpipe [0]);
588	close (sigpipe [1]);	733	close (sigpipe [1]);
589	pipe (sigpipe);	734	pipe (sigpipe);
		735
		736	ev_ref (EV_A); /* signal watcher */
590	siginit ();	737	siginit (EV_A);
591	}	738	}
592		739
593	/*****************************************************************************/	740	/*****************************************************************************/
594		741
595	static void	742	static void
596	call_pending (void)	743	call_pending (EV_P)
597	{	744	{
		745	int pri;
		746
		747	for (pri = NUMPRI; pri--; )
598	while (pendingcnt)	748	while (pendingcnt [pri])
599	{	749	{
600	ANPENDING *p = pendings + --pendingcnt;	750	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
601		751
602	if (p->w)	752	if (p->w)
603	{	753	{
604	p->w->pending = 0;	754	p->w->pending = 0;
605	p->w->cb (p->w, p->events);	755	p->w->cb (EV_A_ p->w, p->events);
606	}	756	}
607	}	757	}
608	}	758	}
609		759
610	static void	760	static void
611	timers_reify (void)	761	timers_reify (EV_P)
612	{	762	{
613	while (timercnt && timers [0]->at <= now)	763	while (timercnt && timers [0]->at <= mn_now)
614	{	764	{
615	struct ev_timer *w = timers [0];	765	struct ev_timer *w = timers [0];
616		766
617	/* first reschedule or stop timer */	767	/* first reschedule or stop timer */
618	if (w->repeat)	768	if (w->repeat)
619	{	769	{
620	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	770	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
621	w->at = now + w->repeat;	771	w->at = mn_now + w->repeat;
622	downheap ((WT *)timers, timercnt, 0);	772	downheap ((WT *)timers, timercnt, 0);
623	}	773	}
624	else	774	else
625	ev_timer_stop (w); /* nonrepeating: stop timer */	775	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
626		776
627	event ((W)w, EV_TIMEOUT);	777	event (EV_A_ (W)w, EV_TIMEOUT);
628	}	778	}
629	}	779	}
630		780
631	static void	781	static void
632	periodics_reify (void)	782	periodics_reify (EV_P)
633	{	783	{
634	while (periodiccnt && periodics [0]->at <= ev_now)	784	while (periodiccnt && periodics [0]->at <= rt_now)
635	{	785	{
636	struct ev_periodic *w = periodics [0];	786	struct ev_periodic *w = periodics [0];
637		787
638	/* first reschedule or stop timer */	788	/* first reschedule or stop timer */
639	if (w->interval)	789	if (w->interval)
640	{	790	{
641	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	791	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
642	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	792	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
643	downheap ((WT *)periodics, periodiccnt, 0);	793	downheap ((WT *)periodics, periodiccnt, 0);
644	}	794	}
645	else	795	else
646	ev_periodic_stop (w); /* nonrepeating: stop timer */	796	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
647		797
648	event ((W)w, EV_PERIODIC);	798	event (EV_A_ (W)w, EV_PERIODIC);
649	}	799	}
650	}	800	}
651		801
652	static void	802	static void
653	periodics_reschedule (ev_tstamp diff)	803	periodics_reschedule (EV_P)
654	{	804	{
655	int i;	805	int i;
656		806
657	/* adjust periodics after time jump */	807	/* adjust periodics after time jump */
658	for (i = 0; i < periodiccnt; ++i)	808	for (i = 0; i < periodiccnt; ++i)
659	{	809	{
660	struct ev_periodic *w = periodics [i];	810	struct ev_periodic *w = periodics [i];
661		811
662	if (w->interval)	812	if (w->interval)
663	{	813	{
664	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	814	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
665		815
666	if (fabs (diff) >= 1e-4)	816	if (fabs (diff) >= 1e-4)
667	{	817	{
668	ev_periodic_stop (w);	818	ev_periodic_stop (EV_A_ w);
669	ev_periodic_start (w);	819	ev_periodic_start (EV_A_ w);
670		820
671	i = 0; /* restart loop, inefficient, but time jumps should be rare */	821	i = 0; /* restart loop, inefficient, but time jumps should be rare */
672	}	822	}
673	}	823	}
674	}	824	}
675	}	825	}
676		826
677	static int	827	inline int
678	time_update_monotonic (void)	828	time_update_monotonic (EV_P)
679	{	829	{
680	now = get_clock ();	830	mn_now = get_clock ();
681		831
682	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	832	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
683	{	833	{
684	ev_now = now + diff;	834	rt_now = rtmn_diff + mn_now;
685	return 0;	835	return 0;
686	}	836	}
687	else	837	else
688	{	838	{
689	now_floor = now;	839	now_floor = mn_now;
690	ev_now = ev_time ();	840	rt_now = ev_time ();
691	return 1;	841	return 1;
692	}	842	}
693	}	843	}
694		844
695	static void	845	static void
696	time_update (void)	846	time_update (EV_P)
697	{	847	{
698	int i;	848	int i;
699		849
700	#if EV_USE_MONOTONIC	850	#if EV_USE_MONOTONIC
701	if (expect_true (have_monotonic))	851	if (expect_true (have_monotonic))
702	{	852	{
703	if (time_update_monotonic ())	853	if (time_update_monotonic (EV_A))
704	{	854	{
705	ev_tstamp odiff = diff;	855	ev_tstamp odiff = rtmn_diff;
706		856
707	for (i = 4; --i; ) /* loop a few times, before making important decisions */	857	for (i = 4; --i; ) /* loop a few times, before making important decisions */
708	{	858	{
709	diff = ev_now - now;	859	rtmn_diff = rt_now - mn_now;
710		860
711	if (fabs (odiff - diff) < MIN_TIMEJUMP)	861	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
712	return; /* all is well */	862	return; /* all is well */
713		863
714	ev_now = ev_time ();	864	rt_now = ev_time ();
715	now = get_clock ();	865	mn_now = get_clock ();
716	now_floor = now;	866	now_floor = mn_now;
717	}	867	}
718		868
719	periodics_reschedule (diff - odiff);	869	periodics_reschedule (EV_A);
720	/* no timer adjustment, as the monotonic clock doesn't jump */	870	/* no timer adjustment, as the monotonic clock doesn't jump */
		871	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
721	}	872	}
722	}	873	}
723	else	874	else
724	#endif	875	#endif
725	{	876	{
726	ev_now = ev_time ();	877	rt_now = ev_time ();
727		878
728	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	879	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
729	{	880	{
730	periodics_reschedule (ev_now - now);	881	periodics_reschedule (EV_A);
731		882
732	/* adjust timers. this is easy, as the offset is the same for all */	883	/* adjust timers. this is easy, as the offset is the same for all */
733	for (i = 0; i < timercnt; ++i)	884	for (i = 0; i < timercnt; ++i)
734	timers [i]->at += diff;	885	timers [i]->at += rt_now - mn_now;
735	}	886	}
736		887
737	now = ev_now;	888	mn_now = rt_now;
738	}	889	}
739	}	890	}
740		891
741	int ev_loop_done;	892	void
		893	ev_ref (EV_P)
		894	{
		895	++activecnt;
		896	}
742		897
		898	void
		899	ev_unref (EV_P)
		900	{
		901	--activecnt;
		902	}
		903
		904	static int loop_done;
		905
		906	void
743	void ev_loop (int flags)	907	ev_loop (EV_P_ int flags)
744	{	908	{
745	double block;	909	double block;
746	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	910	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
747		911
748	do	912	do
749	{	913	{
750	/* queue check watchers (and execute them) */	914	/* queue check watchers (and execute them) */
751	if (expect_false (preparecnt))	915	if (expect_false (preparecnt))
752	{	916	{
753	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	917	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
754	call_pending ();	918	call_pending (EV_A);
755	}	919	}
756		920
757	/* update fd-related kernel structures */	921	/* update fd-related kernel structures */
758	fd_reify ();	922	fd_reify (EV_A);
759		923
760	/* calculate blocking time */	924	/* calculate blocking time */
761		925
762	/* we only need this for !monotonic clockor timers, but as we basically	926	/* we only need this for !monotonic clockor timers, but as we basically
763	always have timers, we just calculate it always */	927	always have timers, we just calculate it always */
764	#if EV_USE_MONOTONIC	928	#if EV_USE_MONOTONIC
765	if (expect_true (have_monotonic))	929	if (expect_true (have_monotonic))
766	time_update_monotonic ();	930	time_update_monotonic (EV_A);
767	else	931	else
768	#endif	932	#endif
769	{	933	{
770	ev_now = ev_time ();	934	rt_now = ev_time ();
771	now = ev_now;	935	mn_now = rt_now;
772	}	936	}
773		937
774	if (flags & EVLOOP_NONBLOCK || idlecnt)	938	if (flags & EVLOOP_NONBLOCK || idlecnt)
775	block = 0.;	939	block = 0.;
776	else	940	else
777	{	941	{
778	block = MAX_BLOCKTIME;	942	block = MAX_BLOCKTIME;
779		943
780	if (timercnt)	944	if (timercnt)
781	{	945	{
782	ev_tstamp to = timers [0]->at - now + method_fudge;	946	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
783	if (block > to) block = to;	947	if (block > to) block = to;
784	}	948	}
785		949
786	if (periodiccnt)	950	if (periodiccnt)
787	{	951	{
788	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	952	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
789	if (block > to) block = to;	953	if (block > to) block = to;
790	}	954	}
791		955
792	if (block < 0.) block = 0.;	956	if (block < 0.) block = 0.;
793	}	957	}
794		958
795	method_poll (block);	959	method_poll (EV_A_ block);
796		960
797	/* update ev_now, do magic */	961	/* update rt_now, do magic */
798	time_update ();	962	time_update (EV_A);
799		963
800	/* queue pending timers and reschedule them */	964	/* queue pending timers and reschedule them */
801	timers_reify (); /* relative timers called last */	965	timers_reify (EV_A); /* relative timers called last */
802	periodics_reify (); /* absolute timers called first */	966	periodics_reify (EV_A); /* absolute timers called first */
803		967
804	/* queue idle watchers unless io or timers are pending */	968	/* queue idle watchers unless io or timers are pending */
805	if (!pendingcnt)	969	if (!pendingcnt)
806	queue_events ((W *)idles, idlecnt, EV_IDLE);	970	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
807		971
808	/* queue check watchers, to be executed first */	972	/* queue check watchers, to be executed first */
809	if (checkcnt)	973	if (checkcnt)
810	queue_events ((W *)checks, checkcnt, EV_CHECK);	974	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
811		975
812	call_pending ();	976	call_pending (EV_A);
813	}	977	}
814	while (!ev_loop_done);	978	while (activecnt && !loop_done);
815		979
816	if (ev_loop_done != 2)	980	if (loop_done != 2)
817	ev_loop_done = 0;	981	loop_done = 0;
		982	}
		983
		984	void
		985	ev_unloop (EV_P_ int how)
		986	{
		987	loop_done = how;
818	}	988	}
819		989
820	/*****************************************************************************/	990	/*****************************************************************************/
821		991
822	static void	992	inline void
823	wlist_add (WL *head, WL elem)	993	wlist_add (WL *head, WL elem)
824	{	994	{
825	elem->next = *head;	995	elem->next = *head;
826	*head = elem;	996	*head = elem;
827	}	997	}
828		998
829	static void	999	inline void
830	wlist_del (WL *head, WL elem)	1000	wlist_del (WL *head, WL elem)
831	{	1001	{
832	while (*head)	1002	while (*head)
833	{	1003	{
834	if (*head == elem)	1004	if (*head == elem)
…		…
839		1009
840	head = &(*head)->next;	1010	head = &(*head)->next;
841	}	1011	}
842	}	1012	}
843		1013
844	static void	1014	inline void
845	ev_clear_pending (W w)	1015	ev_clear_pending (EV_P_ W w)
846	{	1016	{
847	if (w->pending)	1017	if (w->pending)
848	{	1018	{
849	pendings [w->pending - 1].w = 0;	1019	pendings [ABSPRI (w)][w->pending - 1].w = 0;
850	w->pending = 0;	1020	w->pending = 0;
851	}	1021	}
852	}	1022	}
853		1023
854	static void	1024	inline void
855	ev_start (W w, int active)	1025	ev_start (EV_P_ W w, int active)
856	{	1026	{
		1027	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1028	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1029
857	w->active = active;	1030	w->active = active;
		1031	ev_ref (EV_A);
858	}	1032	}
859		1033
860	static void	1034	inline void
861	ev_stop (W w)	1035	ev_stop (EV_P_ W w)
862	{	1036	{
		1037	ev_unref (EV_A);
863	w->active = 0;	1038	w->active = 0;
864	}	1039	}
865		1040
866	/*****************************************************************************/	1041	/*****************************************************************************/
867		1042
868	void	1043	void
869	ev_io_start (struct ev_io *w)	1044	ev_io_start (EV_P_ struct ev_io *w)
870	{	1045	{
871	int fd = w->fd;	1046	int fd = w->fd;
872		1047
873	if (ev_is_active (w))	1048	if (ev_is_active (w))
874	return;	1049	return;
875		1050
876	assert (("ev_io_start called with negative fd", fd >= 0));	1051	assert (("ev_io_start called with negative fd", fd >= 0));
877		1052
878	ev_start ((W)w, 1);	1053	ev_start (EV_A_ (W)w, 1);
879	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1054	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
880	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1055	wlist_add ((WL *)&anfds[fd].head, (WL)w);
881		1056
882	fd_change (fd);	1057	fd_change (EV_A_ fd);
883	}	1058	}
884		1059
885	void	1060	void
886	ev_io_stop (struct ev_io *w)	1061	ev_io_stop (EV_P_ struct ev_io *w)
887	{	1062	{
888	ev_clear_pending ((W)w);	1063	ev_clear_pending (EV_A_ (W)w);
889	if (!ev_is_active (w))	1064	if (!ev_is_active (w))
890	return;	1065	return;
891		1066
892	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1067	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
893	ev_stop ((W)w);	1068	ev_stop (EV_A_ (W)w);
894		1069
895	fd_change (w->fd);	1070	fd_change (EV_A_ w->fd);
896	}	1071	}
897		1072
898	void	1073	void
899	ev_timer_start (struct ev_timer *w)	1074	ev_timer_start (EV_P_ struct ev_timer *w)
900	{	1075	{
901	if (ev_is_active (w))	1076	if (ev_is_active (w))
902	return;	1077	return;
903		1078
904	w->at += now;	1079	w->at += mn_now;
905		1080
906	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1081	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
907		1082
908	ev_start ((W)w, ++timercnt);	1083	ev_start (EV_A_ (W)w, ++timercnt);
909	array_needsize (timers, timermax, timercnt, );	1084	array_needsize (timers, timermax, timercnt, );
910	timers [timercnt - 1] = w;	1085	timers [timercnt - 1] = w;
911	upheap ((WT *)timers, timercnt - 1);	1086	upheap ((WT *)timers, timercnt - 1);
912	}	1087	}
913		1088
914	void	1089	void
915	ev_timer_stop (struct ev_timer *w)	1090	ev_timer_stop (EV_P_ struct ev_timer *w)
916	{	1091	{
917	ev_clear_pending ((W)w);	1092	ev_clear_pending (EV_A_ (W)w);
918	if (!ev_is_active (w))	1093	if (!ev_is_active (w))
919	return;	1094	return;
920		1095
921	if (w->active < timercnt--)	1096	if (w->active < timercnt--)
922	{	1097	{
…		…
924	downheap ((WT *)timers, timercnt, w->active - 1);	1099	downheap ((WT *)timers, timercnt, w->active - 1);
925	}	1100	}
926		1101
927	w->at = w->repeat;	1102	w->at = w->repeat;
928		1103
929	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
930	}	1105	}
931		1106
932	void	1107	void
933	ev_timer_again (struct ev_timer *w)	1108	ev_timer_again (EV_P_ struct ev_timer *w)
934	{	1109	{
935	if (ev_is_active (w))	1110	if (ev_is_active (w))
936	{	1111	{
937	if (w->repeat)	1112	if (w->repeat)
938	{	1113	{
939	w->at = now + w->repeat;	1114	w->at = mn_now + w->repeat;
940	downheap ((WT *)timers, timercnt, w->active - 1);	1115	downheap ((WT *)timers, timercnt, w->active - 1);
941	}	1116	}
942	else	1117	else
943	ev_timer_stop (w);	1118	ev_timer_stop (EV_A_ w);
944	}	1119	}
945	else if (w->repeat)	1120	else if (w->repeat)
946	ev_timer_start (w);	1121	ev_timer_start (EV_A_ w);
947	}	1122	}
948		1123
949	void	1124	void
950	ev_periodic_start (struct ev_periodic *w)	1125	ev_periodic_start (EV_P_ struct ev_periodic *w)
951	{	1126	{
952	if (ev_is_active (w))	1127	if (ev_is_active (w))
953	return;	1128	return;
954		1129
955	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1130	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
956		1131
957	/* this formula differs from the one in periodic_reify because we do not always round up */	1132	/* this formula differs from the one in periodic_reify because we do not always round up */
958	if (w->interval)	1133	if (w->interval)
959	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1134	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
960		1135
961	ev_start ((W)w, ++periodiccnt);	1136	ev_start (EV_A_ (W)w, ++periodiccnt);
962	array_needsize (periodics, periodicmax, periodiccnt, );	1137	array_needsize (periodics, periodicmax, periodiccnt, );
963	periodics [periodiccnt - 1] = w;	1138	periodics [periodiccnt - 1] = w;
964	upheap ((WT *)periodics, periodiccnt - 1);	1139	upheap ((WT *)periodics, periodiccnt - 1);
965	}	1140	}
966		1141
967	void	1142	void
968	ev_periodic_stop (struct ev_periodic *w)	1143	ev_periodic_stop (EV_P_ struct ev_periodic *w)
969	{	1144	{
970	ev_clear_pending ((W)w);	1145	ev_clear_pending (EV_A_ (W)w);
971	if (!ev_is_active (w))	1146	if (!ev_is_active (w))
972	return;	1147	return;
973		1148
974	if (w->active < periodiccnt--)	1149	if (w->active < periodiccnt--)
975	{	1150	{
976	periodics [w->active - 1] = periodics [periodiccnt];	1151	periodics [w->active - 1] = periodics [periodiccnt];
977	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1152	downheap ((WT *)periodics, periodiccnt, w->active - 1);
978	}	1153	}
979		1154
980	ev_stop ((W)w);	1155	ev_stop (EV_A_ (W)w);
981	}	1156	}
982		1157
983	void	1158	void
984	ev_signal_start (struct ev_signal *w)	1159	ev_idle_start (EV_P_ struct ev_idle *w)
985	{	1160	{
986	if (ev_is_active (w))	1161	if (ev_is_active (w))
987	return;	1162	return;
988		1163
		1164	ev_start (EV_A_ (W)w, ++idlecnt);
		1165	array_needsize (idles, idlemax, idlecnt, );
		1166	idles [idlecnt - 1] = w;
		1167	}
		1168
		1169	void
		1170	ev_idle_stop (EV_P_ struct ev_idle *w)
		1171	{
		1172	ev_clear_pending (EV_A_ (W)w);
		1173	if (ev_is_active (w))
		1174	return;
		1175
		1176	idles [w->active - 1] = idles [--idlecnt];
		1177	ev_stop (EV_A_ (W)w);
		1178	}
		1179
		1180	void
		1181	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1182	{
		1183	if (ev_is_active (w))
		1184	return;
		1185
		1186	ev_start (EV_A_ (W)w, ++preparecnt);
		1187	array_needsize (prepares, preparemax, preparecnt, );
		1188	prepares [preparecnt - 1] = w;
		1189	}
		1190
		1191	void
		1192	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1193	{
		1194	ev_clear_pending (EV_A_ (W)w);
		1195	if (ev_is_active (w))
		1196	return;
		1197
		1198	prepares [w->active - 1] = prepares [--preparecnt];
		1199	ev_stop (EV_A_ (W)w);
		1200	}
		1201
		1202	void
		1203	ev_check_start (EV_P_ struct ev_check *w)
		1204	{
		1205	if (ev_is_active (w))
		1206	return;
		1207
		1208	ev_start (EV_A_ (W)w, ++checkcnt);
		1209	array_needsize (checks, checkmax, checkcnt, );
		1210	checks [checkcnt - 1] = w;
		1211	}
		1212
		1213	void
		1214	ev_check_stop (EV_P_ struct ev_check *w)
		1215	{
		1216	ev_clear_pending (EV_A_ (W)w);
		1217	if (ev_is_active (w))
		1218	return;
		1219
		1220	checks [w->active - 1] = checks [--checkcnt];
		1221	ev_stop (EV_A_ (W)w);
		1222	}
		1223
		1224	#ifndef SA_RESTART
		1225	# define SA_RESTART 0
		1226	#endif
		1227
		1228	void
		1229	ev_signal_start (EV_P_ struct ev_signal *w)
		1230	{
		1231	#if EV_MULTIPLICITY
		1232	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1233	#endif
		1234	if (ev_is_active (w))
		1235	return;
		1236
989	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1237	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
990		1238
991	ev_start ((W)w, 1);	1239	ev_start (EV_A_ (W)w, 1);
992	array_needsize (signals, signalmax, w->signum, signals_init);	1240	array_needsize (signals, signalmax, w->signum, signals_init);
993	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1241	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
994		1242
995	if (!w->next)	1243	if (!w->next)
996	{	1244	{
997	struct sigaction sa;	1245	struct sigaction sa;
998	sa.sa_handler = sighandler;	1246	sa.sa_handler = sighandler;
999	sigfillset (&sa.sa_mask);	1247	sigfillset (&sa.sa_mask);
1000	sa.sa_flags = 0;	1248	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1001	sigaction (w->signum, &sa, 0);	1249	sigaction (w->signum, &sa, 0);
1002	}	1250	}
1003	}	1251	}
1004		1252
1005	void	1253	void
1006	ev_signal_stop (struct ev_signal *w)	1254	ev_signal_stop (EV_P_ struct ev_signal *w)
1007	{	1255	{
1008	ev_clear_pending ((W)w);	1256	ev_clear_pending (EV_A_ (W)w);
1009	if (!ev_is_active (w))	1257	if (!ev_is_active (w))
1010	return;	1258	return;
1011		1259
1012	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1260	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1013	ev_stop ((W)w);	1261	ev_stop (EV_A_ (W)w);
1014		1262
1015	if (!signals [w->signum - 1].head)	1263	if (!signals [w->signum - 1].head)
1016	signal (w->signum, SIG_DFL);	1264	signal (w->signum, SIG_DFL);
1017	}	1265	}
1018		1266
1019	void	1267	void
1020	ev_idle_start (struct ev_idle *w)	1268	ev_child_start (EV_P_ struct ev_child *w)
1021	{	1269	{
		1270	#if EV_MULTIPLICITY
		1271	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1272	#endif
1022	if (ev_is_active (w))	1273	if (ev_is_active (w))
1023	return;	1274	return;
1024		1275
1025	ev_start ((W)w, ++idlecnt);	1276	ev_start (EV_A_ (W)w, 1);
1026	array_needsize (idles, idlemax, idlecnt, );	1277	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1027	idles [idlecnt - 1] = w;
1028	}	1278	}
1029		1279
1030	void	1280	void
1031	ev_idle_stop (struct ev_idle *w)	1281	ev_child_stop (EV_P_ struct ev_child *w)
1032	{	1282	{
1033	ev_clear_pending ((W)w);	1283	ev_clear_pending (EV_A_ (W)w);
1034	if (ev_is_active (w))	1284	if (ev_is_active (w))
1035	return;	1285	return;
1036		1286
1037	idles [w->active - 1] = idles [--idlecnt];
1038	ev_stop ((W)w);
1039	}
1040
1041	void
1042	ev_prepare_start (struct ev_prepare *w)
1043	{
1044	if (ev_is_active (w))
1045	return;
1046
1047	ev_start ((W)w, ++preparecnt);
1048	array_needsize (prepares, preparemax, preparecnt, );
1049	prepares [preparecnt - 1] = w;
1050	}
1051
1052	void
1053	ev_prepare_stop (struct ev_prepare *w)
1054	{
1055	ev_clear_pending ((W)w);
1056	if (ev_is_active (w))
1057	return;
1058
1059	prepares [w->active - 1] = prepares [--preparecnt];
1060	ev_stop ((W)w);
1061	}
1062
1063	void
1064	ev_check_start (struct ev_check *w)
1065	{
1066	if (ev_is_active (w))
1067	return;
1068
1069	ev_start ((W)w, ++checkcnt);
1070	array_needsize (checks, checkmax, checkcnt, );
1071	checks [checkcnt - 1] = w;
1072	}
1073
1074	void
1075	ev_check_stop (struct ev_check *w)
1076	{
1077	ev_clear_pending ((W)w);
1078	if (ev_is_active (w))
1079	return;
1080
1081	checks [w->active - 1] = checks [--checkcnt];
1082	ev_stop ((W)w);
1083	}
1084
1085	void
1086	ev_child_start (struct ev_child *w)
1087	{
1088	if (ev_is_active (w))
1089	return;
1090
1091	ev_start ((W)w, 1);
1092	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1093	}
1094
1095	void
1096	ev_child_stop (struct ev_child *w)
1097	{
1098	ev_clear_pending ((W)w);
1099	if (ev_is_active (w))
1100	return;
1101
1102	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1287	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1103	ev_stop ((W)w);	1288	ev_stop (EV_A_ (W)w);
1104	}	1289	}
1105		1290
1106	/*****************************************************************************/	1291	/*****************************************************************************/
1107		1292
1108	struct ev_once	1293	struct ev_once
…		…
1112	void (*cb)(int revents, void *arg);	1297	void (*cb)(int revents, void *arg);
1113	void *arg;	1298	void *arg;
1114	};	1299	};
1115		1300
1116	static void	1301	static void
1117	once_cb (struct ev_once *once, int revents)	1302	once_cb (EV_P_ struct ev_once *once, int revents)
1118	{	1303	{
1119	void (*cb)(int revents, void *arg) = once->cb;	1304	void (*cb)(int revents, void *arg) = once->cb;
1120	void *arg = once->arg;	1305	void *arg = once->arg;
1121		1306
1122	ev_io_stop (&once->io);	1307	ev_io_stop (EV_A_ &once->io);
1123	ev_timer_stop (&once->to);	1308	ev_timer_stop (EV_A_ &once->to);
1124	free (once);	1309	free (once);
1125		1310
1126	cb (revents, arg);	1311	cb (revents, arg);
1127	}	1312	}
1128		1313
1129	static void	1314	static void
1130	once_cb_io (struct ev_io *w, int revents)	1315	once_cb_io (EV_P_ struct ev_io *w, int revents)
1131	{	1316	{
1132	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1317	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1133	}	1318	}
1134		1319
1135	static void	1320	static void
1136	once_cb_to (struct ev_timer *w, int revents)	1321	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1137	{	1322	{
1138	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1323	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1139	}	1324	}
1140		1325
1141	void	1326	void
1142	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1327	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1143	{	1328	{
1144	struct ev_once *once = malloc (sizeof (struct ev_once));	1329	struct ev_once *once = malloc (sizeof (struct ev_once));
1145		1330
1146	if (!once)	1331	if (!once)
1147	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1332	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
…		…
1152		1337
1153	ev_watcher_init (&once->io, once_cb_io);	1338	ev_watcher_init (&once->io, once_cb_io);
1154	if (fd >= 0)	1339	if (fd >= 0)
1155	{	1340	{
1156	ev_io_set (&once->io, fd, events);	1341	ev_io_set (&once->io, fd, events);
1157	ev_io_start (&once->io);	1342	ev_io_start (EV_A_ &once->io);
1158	}	1343	}
1159		1344
1160	ev_watcher_init (&once->to, once_cb_to);	1345	ev_watcher_init (&once->to, once_cb_to);
1161	if (timeout >= 0.)	1346	if (timeout >= 0.)
1162	{	1347	{
1163	ev_timer_set (&once->to, timeout, 0.);	1348	ev_timer_set (&once->to, timeout, 0.);
1164	ev_timer_start (&once->to);	1349	ev_timer_start (EV_A_ &once->to);
1165	}	1350	}
1166	}	1351	}
1167	}	1352	}
1168		1353
1169	/*****************************************************************************/
1170
1171	#if 0
1172
1173	struct ev_io wio;
1174
1175	static void
1176	sin_cb (struct ev_io *w, int revents)
1177	{
1178	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1179	}
1180
1181	static void
1182	ocb (struct ev_timer *w, int revents)
1183	{
1184	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1185	ev_timer_stop (w);
1186	ev_timer_start (w);
1187	}
1188
1189	static void
1190	scb (struct ev_signal *w, int revents)
1191	{
1192	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1193	ev_io_stop (&wio);
1194	ev_io_start (&wio);
1195	}
1196
1197	static void
1198	gcb (struct ev_signal *w, int revents)
1199	{
1200	fprintf (stderr, "generic %x\n", revents);
1201
1202	}
1203
1204	int main (void)
1205	{
1206	ev_init (0);
1207
1208	ev_io_init (&wio, sin_cb, 0, EV_READ);
1209	ev_io_start (&wio);
1210
1211	struct ev_timer t[10000];
1212
1213	#if 0
1214	int i;
1215	for (i = 0; i < 10000; ++i)
1216	{
1217	struct ev_timer *w = t + i;
1218	ev_watcher_init (w, ocb, i);
1219	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1220	ev_timer_start (w);
1221	if (drand48 () < 0.5)
1222	ev_timer_stop (w);
1223	}
1224	#endif
1225
1226	struct ev_timer t1;
1227	ev_timer_init (&t1, ocb, 5, 10);
1228	ev_timer_start (&t1);
1229
1230	struct ev_signal sig;
1231	ev_signal_init (&sig, scb, SIGQUIT);
1232	ev_signal_start (&sig);
1233
1234	struct ev_check cw;
1235	ev_check_init (&cw, gcb);
1236	ev_check_start (&cw);
1237
1238	struct ev_idle iw;
1239	ev_idle_init (&iw, gcb);
1240	ev_idle_start (&iw);
1241
1242	ev_loop (0);
1243
1244	return 0;
1245	}
1246
1247	#endif
1248
1249
1250
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