[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs.
Revision 1.70 by root, Tue Nov 6 00:52:32 2007 UTC

…		…
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	#ifndef EV_STANDALONE	31	#ifndef EV_STANDALONE
32	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
33	#endif	55	#endif
34		56
35	#include <math.h>	57	#include <math.h>
36	#include <stdlib.h>	58	#include <stdlib.h>
37	#include <unistd.h>	59	#include <unistd.h>
…		…
70		92
71	#ifndef EV_USE_KQUEUE	93	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	94	# define EV_USE_KQUEUE 0
73	#endif	95	#endif
74		96
		97	#ifndef EV_USE_WIN32
		98	# ifdef WIN32
		99	# define EV_USE_WIN32 1
		100	# else
		101	# define EV_USE_WIN32 0
		102	# endif
		103	#endif
		104
75	#ifndef EV_USE_REALTIME	105	#ifndef EV_USE_REALTIME
76	# define EV_USE_REALTIME 1	106	# define EV_USE_REALTIME 1
77	#endif	107	#endif
78		108
79	/**/	109	/**/
…		…
113		143
114	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
117		147
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
119	ev_tstamp ev_now;
120	int ev_method;
121		149
122	static int have_monotonic; /* runtime */	150	#if WIN32
123		151	/* note: the comment below could not be substantiated, but what would I care */
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	152	/* MSDN says this is required to handle SIGFPE */
125	static void (*method_modify)(int fd, int oev, int nev);	153	volatile double SIGFPE_REQ = 0.0f;
126	static void (*method_poll)(ev_tstamp timeout);	154	#endif
127		155
128	/*****************************************************************************/	156	/*****************************************************************************/
129		157
130	ev_tstamp	158	static void (syserr_cb)(const char msg);
		159
		160	void ev_set_syserr_cb (void (cb)(const char msg))
		161	{
		162	syserr_cb = cb;
		163	}
		164
		165	static void
		166	syserr (const char *msg)
		167	{
		168	if (!msg)
		169	msg = "(libev) system error";
		170
		171	if (syserr_cb)
		172	syserr_cb (msg);
		173	else
		174	{
		175	perror (msg);
		176	abort ();
		177	}
		178	}
		179
		180	static void (alloc)(void *ptr, long size);
		181
		182	void ev_set_allocator (void (cb)(void *ptr, long size))
		183	{
		184	alloc = cb;
		185	}
		186
		187	static void *
		188	ev_realloc (void *ptr, long size)
		189	{
		190	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		191
		192	if (!ptr && size)
		193	{
		194	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		195	abort ();
		196	}
		197
		198	return ptr;
		199	}
		200
		201	#define ev_malloc(size) ev_realloc (0, (size))
		202	#define ev_free(ptr) ev_realloc ((ptr), 0)
		203
		204	/*****************************************************************************/
		205
		206	typedef struct
		207	{
		208	WL head;
		209	unsigned char events;
		210	unsigned char reify;
		211	} ANFD;
		212
		213	typedef struct
		214	{
		215	W w;
		216	int events;
		217	} ANPENDING;
		218
		219	#if EV_MULTIPLICITY
		220
		221	struct ev_loop
		222	{
		223	# define VAR(name,decl) decl;
		224	# include "ev_vars.h"
		225	};
		226	# undef VAR
		227	# include "ev_wrap.h"
		228
		229	#else
		230
		231	# define VAR(name,decl) static decl;
		232	# include "ev_vars.h"
		233	# undef VAR
		234
		235	#endif
		236
		237	/*****************************************************************************/
		238
		239	inline ev_tstamp
131	ev_time (void)	240	ev_time (void)
132	{	241	{
133	#if EV_USE_REALTIME	242	#if EV_USE_REALTIME
134	struct timespec ts;	243	struct timespec ts;
135	clock_gettime (CLOCK_REALTIME, &ts);	244	clock_gettime (CLOCK_REALTIME, &ts);
…		…
139	gettimeofday (&tv, 0);	248	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	249	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	250	#endif
142	}	251	}
143		252
144	static ev_tstamp	253	inline ev_tstamp
145	get_clock (void)	254	get_clock (void)
146	{	255	{
147	#if EV_USE_MONOTONIC	256	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	257	if (expect_true (have_monotonic))
149	{	258	{
…		…
154	#endif	263	#endif
155		264
156	return ev_time ();	265	return ev_time ();
157	}	266	}
158		267
		268	ev_tstamp
		269	ev_now (EV_P)
		270	{
		271	return rt_now;
		272	}
		273
159	#define array_roundsize(base,n) ((n) \| 4 & ~3)	274	#define array_roundsize(base,n) ((n) \| 4 & ~3)
160		275
161	#define array_needsize(base,cur,cnt,init) \	276	#define array_needsize(base,cur,cnt,init) \
162	if (expect_false ((cnt) > cur)) \	277	if (expect_false ((cnt) > cur)) \
163	{ \	278	{ \
164	int newcnt = cur; \	279	int newcnt = cur; \
165	do \	280	do \
166	{ \	281	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \	282	newcnt = array_roundsize (base, newcnt << 1); \
168	} \	283	} \
169	while ((cnt) > newcnt); \	284	while ((cnt) > newcnt); \
170	\	285	\
171	base = realloc (base, sizeof (base) (newcnt)); \	286	base = ev_realloc (base, sizeof (base) (newcnt)); \
172	init (base + cur, newcnt - cur); \	287	init (base + cur, newcnt - cur); \
173	cur = newcnt; \	288	cur = newcnt; \
174	}	289	}
		290
		291	#define array_slim(stem) \
		292	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		293	{ \
		294	stem ## max = array_roundsize (stem ## cnt >> 1); \
		295	base = ev_realloc (base, sizeof (base) (stem ## max)); \
		296	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		297	}
		298
		299	#define array_free(stem, idx) \
		300	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
175		301
176	/*****************************************************************************/	302	/*****************************************************************************/
177
178	typedef struct
179	{
180	struct ev_watcher_list *head;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184
185	static ANFD *anfds;
186	static int anfdmax;
187		303
188	static void	304	static void
189	anfds_init (ANFD *base, int count)	305	anfds_init (ANFD *base, int count)
190	{	306	{
191	while (count--)	307	while (count--)
…		…
196		312
197	++base;	313	++base;
198	}	314	}
199	}	315	}
200		316
201	typedef struct
202	{
203	W w;
204	int events;
205	} ANPENDING;
206
207	static ANPENDING *pendings [NUMPRI];
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void	317	static void
211	event (W w, int events)	318	event (EV_P_ W w, int events)
212	{	319	{
213	if (w->pending)	320	if (w->pending)
214	{	321	{
215	pendings [ABSPRI (w)][w->pending - 1].events \|= events;	322	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
216	return;	323	return;
…		…
221	pendings [ABSPRI (w)][w->pending - 1].w = w;	328	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;	329	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}	330	}
224		331
225	static void	332	static void
226	queue_events (W *events, int eventcnt, int type)	333	queue_events (EV_P_ W *events, int eventcnt, int type)
227	{	334	{
228	int i;	335	int i;
229		336
230	for (i = 0; i < eventcnt; ++i)	337	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);	338	event (EV_A_ events [i], type);
232	}	339	}
233		340
234	static void	341	static void
235	fd_event (int fd, int events)	342	fd_event (EV_P_ int fd, int events)
236	{	343	{
237	ANFD *anfd = anfds + fd;	344	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	345	struct ev_io *w;
239		346
240	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)	347	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
241	{	348	{
242	int ev = w->events & events;	349	int ev = w->events & events;
243		350
244	if (ev)	351	if (ev)
245	event ((W)w, ev);	352	event (EV_A_ (W)w, ev);
246	}	353	}
247	}	354	}
248		355
249	/*****************************************************************************/	356	/*****************************************************************************/
250		357
251	static int *fdchanges;
252	static int fdchangemax, fdchangecnt;
253
254	static void	358	static void
255	fd_reify (void)	359	fd_reify (EV_P)
256	{	360	{
257	int i;	361	int i;
258		362
259	for (i = 0; i < fdchangecnt; ++i)	363	for (i = 0; i < fdchangecnt; ++i)
260	{	364	{
…		…
267	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)	371	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
268	events \|= w->events;	372	events \|= w->events;
269		373
270	anfd->reify = 0;	374	anfd->reify = 0;
271		375
272	if (anfd->events != events)
273	{
274	method_modify (fd, anfd->events, events);	376	method_modify (EV_A_ fd, anfd->events, events);
275	anfd->events = events;	377	anfd->events = events;
276	}
277	}	378	}
278		379
279	fdchangecnt = 0;	380	fdchangecnt = 0;
280	}	381	}
281		382
282	static void	383	static void
283	fd_change (int fd)	384	fd_change (EV_P_ int fd)
284	{	385	{
285	if (anfds [fd].reify \|\| fdchangecnt < 0)	386	if (anfds [fd].reify)
286	return;	387	return;
287		388
288	anfds [fd].reify = 1;	389	anfds [fd].reify = 1;
289		390
290	++fdchangecnt;	391	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	392	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
292	fdchanges [fdchangecnt - 1] = fd;	393	fdchanges [fdchangecnt - 1] = fd;
293	}	394	}
294		395
295	static void	396	static void
296	fd_kill (int fd)	397	fd_kill (EV_P_ int fd)
297	{	398	{
298	struct ev_io *w;	399	struct ev_io *w;
299		400
300	while ((w = (struct ev_io *)anfds [fd].head))	401	while ((w = (struct ev_io *)anfds [fd].head))
301	{	402	{
302	ev_io_stop (w);	403	ev_io_stop (EV_A_ w);
303	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);	404	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
304	}	405	}
305	}	406	}
306		407
307	/* called on EBADF to verify fds */	408	/* called on EBADF to verify fds */
308	static void	409	static void
309	fd_ebadf (void)	410	fd_ebadf (EV_P)
310	{	411	{
311	int fd;	412	int fd;
312		413
313	for (fd = 0; fd < anfdmax; ++fd)	414	for (fd = 0; fd < anfdmax; ++fd)
314	if (anfds [fd].events)	415	if (anfds [fd].events)
315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	416	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
316	fd_kill (fd);	417	fd_kill (EV_A_ fd);
317	}	418	}
318		419
319	/* called on ENOMEM in select/poll to kill some fds and retry */	420	/* called on ENOMEM in select/poll to kill some fds and retry */
320	static void	421	static void
321	fd_enomem (void)	422	fd_enomem (EV_P)
322	{	423	{
323	int fd = anfdmax;	424	int fd;
324		425
325	while (fd--)	426	for (fd = anfdmax; fd--; )
326	if (anfds [fd].events)	427	if (anfds [fd].events)
327	{	428	{
328	close (fd);
329	fd_kill (fd);	429	fd_kill (EV_A_ fd);
330	return;	430	return;
331	}	431	}
332	}	432	}
333		433
		434	/* usually called after fork if method needs to re-arm all fds from scratch */
		435	static void
		436	fd_rearm_all (EV_P)
		437	{
		438	int fd;
		439
		440	/* this should be highly optimised to not do anything but set a flag */
		441	for (fd = 0; fd < anfdmax; ++fd)
		442	if (anfds [fd].events)
		443	{
		444	anfds [fd].events = 0;
		445	fd_change (EV_A_ fd);
		446	}
		447	}
		448
334	/*****************************************************************************/	449	/*****************************************************************************/
335		450
336	static struct ev_timer **timers;
337	static int timermax, timercnt;
338
339	static struct ev_periodic **periodics;
340	static int periodicmax, periodiccnt;
341
342	static void	451	static void
343	upheap (WT *timers, int k)	452	upheap (WT *heap, int k)
344	{	453	{
345	WT w = timers [k];	454	WT w = heap [k];
346		455
347	while (k && timers [k >> 1]->at > w->at)	456	while (k && heap [k >> 1]->at > w->at)
348	{	457	{
349	timers [k] = timers [k >> 1];	458	heap [k] = heap [k >> 1];
350	timers [k]->active = k + 1;	459	((W)heap [k])->active = k + 1;
351	k >>= 1;	460	k >>= 1;
352	}	461	}
353		462
354	timers [k] = w;	463	heap [k] = w;
355	timers [k]->active = k + 1;	464	((W)heap [k])->active = k + 1;
356		465
357	}	466	}
358		467
359	static void	468	static void
360	downheap (WT *timers, int N, int k)	469	downheap (WT *heap, int N, int k)
361	{	470	{
362	WT w = timers [k];	471	WT w = heap [k];
363		472
364	while (k < (N >> 1))	473	while (k < (N >> 1))
365	{	474	{
366	int j = k << 1;	475	int j = k << 1;
367		476
368	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	477	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
369	++j;	478	++j;
370		479
371	if (w->at <= timers [j]->at)	480	if (w->at <= heap [j]->at)
372	break;	481	break;
373		482
374	timers [k] = timers [j];	483	heap [k] = heap [j];
375	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
376	k = j;	485	k = j;
377	}	486	}
378		487
379	timers [k] = w;	488	heap [k] = w;
380	timers [k]->active = k + 1;	489	((W)heap [k])->active = k + 1;
381	}	490	}
382		491
383	/*****************************************************************************/	492	/*****************************************************************************/
384		493
385	typedef struct	494	typedef struct
386	{	495	{
387	struct ev_watcher_list *head;	496	WL head;
388	sig_atomic_t volatile gotsig;	497	sig_atomic_t volatile gotsig;
389	} ANSIG;	498	} ANSIG;
390		499
391	static ANSIG *signals;	500	static ANSIG *signals;
392	static int signalmax;	501	static int signalmax;
…		…
408	}	517	}
409		518
410	static void	519	static void
411	sighandler (int signum)	520	sighandler (int signum)
412	{	521	{
		522	#if WIN32
		523	signal (signum, sighandler);
		524	#endif
		525
413	signals [signum - 1].gotsig = 1;	526	signals [signum - 1].gotsig = 1;
414		527
415	if (!gotsig)	528	if (!gotsig)
416	{	529	{
417	int old_errno = errno;	530	int old_errno = errno;
…		…
420	errno = old_errno;	533	errno = old_errno;
421	}	534	}
422	}	535	}
423		536
424	static void	537	static void
425	sigcb (struct ev_io *iow, int revents)	538	sigcb (EV_P_ struct ev_io *iow, int revents)
426	{	539	{
427	struct ev_watcher_list *w;	540	WL w;
428	int signum;	541	int signum;
429		542
430	read (sigpipe [0], &revents, 1);	543	read (sigpipe [0], &revents, 1);
431	gotsig = 0;	544	gotsig = 0;
432		545
…		…
434	if (signals [signum].gotsig)	547	if (signals [signum].gotsig)
435	{	548	{
436	signals [signum].gotsig = 0;	549	signals [signum].gotsig = 0;
437		550
438	for (w = signals [signum].head; w; w = w->next)	551	for (w = signals [signum].head; w; w = w->next)
439	event ((W)w, EV_SIGNAL);	552	event (EV_A_ (W)w, EV_SIGNAL);
440	}	553	}
441	}	554	}
442		555
443	static void	556	static void
444	siginit (void)	557	siginit (EV_P)
445	{	558	{
446	#ifndef WIN32	559	#ifndef WIN32
447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	560	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	561	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
449		562
…		…
451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	564	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	565	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
453	#endif	566	#endif
454		567
455	ev_io_set (&sigev, sigpipe [0], EV_READ);	568	ev_io_set (&sigev, sigpipe [0], EV_READ);
456	ev_io_start (&sigev);	569	ev_io_start (EV_A_ &sigev);
		570	ev_unref (EV_A); /* child watcher should not keep loop alive */
457	}	571	}
458		572
459	/*****************************************************************************/	573	/*****************************************************************************/
460		574
461	static struct ev_idle **idles;	575	#ifndef WIN32
462	static int idlemax, idlecnt;
463
464	static struct ev_prepare **prepares;
465	static int preparemax, preparecnt;
466
467	static struct ev_check **checks;
468	static int checkmax, checkcnt;
469
470	/*****************************************************************************/
471		576
472	static struct ev_child *childs [PID_HASHSIZE];	577	static struct ev_child *childs [PID_HASHSIZE];
473	static struct ev_signal childev;	578	static struct ev_signal childev;
474		579
475	#ifndef WIN32
476
477	#ifndef WCONTINUED	580	#ifndef WCONTINUED
478	# define WCONTINUED 0	581	# define WCONTINUED 0
479	#endif	582	#endif
480		583
481	static void	584	static void
482	child_reap (struct ev_signal *sw, int chain, int pid, int status)	585	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
483	{	586	{
484	struct ev_child *w;	587	struct ev_child *w;
485		588
486	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)	589	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
487	if (w->pid == pid \|\| !w->pid)	590	if (w->pid == pid \|\| !w->pid)
488	{	591	{
489	w->priority = sw->priority; /* need to do it now */	592	ev_priority (w) = ev_priority (sw); /* need to do it now */
490	w->rpid = pid;	593	w->rpid = pid;
491	w->rstatus = status;	594	w->rstatus = status;
492	event ((W)w, EV_CHILD);	595	event (EV_A_ (W)w, EV_CHILD);
493	}	596	}
494	}	597	}
495		598
496	static void	599	static void
497	childcb (struct ev_signal *sw, int revents)	600	childcb (EV_P_ struct ev_signal *sw, int revents)
498	{	601	{
499	int pid, status;	602	int pid, status;
500		603
501	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))	604	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
502	{	605	{
503	/* make sure we are called again until all childs have been reaped */	606	/* make sure we are called again until all childs have been reaped */
504	event ((W)sw, EV_SIGNAL);	607	event (EV_A_ (W)sw, EV_SIGNAL);
505		608
506	child_reap (sw, pid, pid, status);	609	child_reap (EV_A_ sw, pid, pid, status);
507	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	610	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
508	}	611	}
509	}	612	}
510		613
511	#endif	614	#endif
512		615
…		…
537	return EV_VERSION_MINOR;	640	return EV_VERSION_MINOR;
538	}	641	}
539		642
540	/* return true if we are running with elevated privileges and should ignore env variables */	643	/* return true if we are running with elevated privileges and should ignore env variables */
541	static int	644	static int
542	enable_secure ()	645	enable_secure (void)
543	{	646	{
544	#ifdef WIN32	647	#ifdef WIN32
545	return 0;	648	return 0;
546	#else	649	#else
547	return getuid () != geteuid ()	650	return getuid () != geteuid ()
548	\|\| getgid () != getegid ();	651	\|\| getgid () != getegid ();
549	#endif	652	#endif
550	}	653	}
551		654
552	int ev_init (int methods)	655	int
		656	ev_method (EV_P)
553	{	657	{
		658	return method;
		659	}
		660
		661	static void
		662	loop_init (EV_P_ int methods)
		663	{
554	if (!ev_method)	664	if (!method)
555	{	665	{
556	#if EV_USE_MONOTONIC	666	#if EV_USE_MONOTONIC
557	{	667	{
558	struct timespec ts;	668	struct timespec ts;
559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	669	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
560	have_monotonic = 1;	670	have_monotonic = 1;
561	}	671	}
562	#endif	672	#endif
563		673
564	ev_now = ev_time ();	674	rt_now = ev_time ();
565	now = get_clock ();	675	mn_now = get_clock ();
566	now_floor = now;	676	now_floor = mn_now;
567	diff = ev_now - now;	677	rtmn_diff = rt_now - mn_now;
568
569	if (pipe (sigpipe))
570	return 0;
571		678
572	if (methods == EVMETHOD_AUTO)	679	if (methods == EVMETHOD_AUTO)
573	if (!enable_secure () && getenv ("LIBEV_METHODS"))	680	if (!enable_secure () && getenv ("LIBEV_METHODS"))
574	methods = atoi (getenv ("LIBEV_METHODS"));	681	methods = atoi (getenv ("LIBEV_METHODS"));
575	else	682	else
576	methods = EVMETHOD_ANY;	683	methods = EVMETHOD_ANY;
577		684
578	ev_method = 0;	685	method = 0;
		686	#if EV_USE_WIN32
		687	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		688	#endif
579	#if EV_USE_KQUEUE	689	#if EV_USE_KQUEUE
580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	690	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
581	#endif	691	#endif
582	#if EV_USE_EPOLL	692	#if EV_USE_EPOLL
583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	693	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
584	#endif	694	#endif
585	#if EV_USE_POLL	695	#if EV_USE_POLL
586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	696	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
587	#endif	697	#endif
588	#if EV_USE_SELECT	698	#if EV_USE_SELECT
589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	699	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
590	#endif	700	#endif
591		701
		702	ev_watcher_init (&sigev, sigcb);
		703	ev_set_priority (&sigev, EV_MAXPRI);
		704	}
		705	}
		706
		707	void
		708	loop_destroy (EV_P)
		709	{
		710	int i;
		711
		712	#if EV_USE_WIN32
		713	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		714	#endif
		715	#if EV_USE_KQUEUE
		716	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		717	#endif
		718	#if EV_USE_EPOLL
		719	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		720	#endif
		721	#if EV_USE_POLL
		722	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		723	#endif
		724	#if EV_USE_SELECT
		725	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		726	#endif
		727
		728	for (i = NUMPRI; i--; )
		729	array_free (pending, [i]);
		730
		731	array_free (fdchange, );
		732	array_free (timer, );
		733	array_free (periodic, );
		734	array_free (idle, );
		735	array_free (prepare, );
		736	array_free (check, );
		737
		738	method = 0;
		739	}
		740
		741	static void
		742	loop_fork (EV_P)
		743	{
		744	#if EV_USE_EPOLL
		745	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		746	#endif
		747	#if EV_USE_KQUEUE
		748	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		749	#endif
		750
		751	if (ev_is_active (&sigev))
		752	{
		753	/* default loop */
		754
		755	ev_ref (EV_A);
		756	ev_io_stop (EV_A_ &sigev);
		757	close (sigpipe [0]);
		758	close (sigpipe [1]);
		759
		760	while (pipe (sigpipe))
		761	syserr ("(libev) error creating pipe");
		762
		763	siginit (EV_A);
		764	}
		765
		766	postfork = 0;
		767	}
		768
		769	#if EV_MULTIPLICITY
		770	struct ev_loop *
		771	ev_loop_new (int methods)
		772	{
		773	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		774
		775	memset (loop, 0, sizeof (struct ev_loop));
		776
		777	loop_init (EV_A_ methods);
		778
		779	if (ev_method (EV_A))
		780	return loop;
		781
		782	return 0;
		783	}
		784
		785	void
		786	ev_loop_destroy (EV_P)
		787	{
		788	loop_destroy (EV_A);
		789	ev_free (loop);
		790	}
		791
		792	void
		793	ev_loop_fork (EV_P)
		794	{
		795	postfork = 1;
		796	}
		797
		798	#endif
		799
		800	#if EV_MULTIPLICITY
		801	struct ev_loop default_loop_struct;
		802	static struct ev_loop *default_loop;
		803
		804	struct ev_loop *
		805	#else
		806	static int default_loop;
		807
		808	int
		809	#endif
		810	ev_default_loop (int methods)
		811	{
		812	if (sigpipe [0] == sigpipe [1])
		813	if (pipe (sigpipe))
		814	return 0;
		815
		816	if (!default_loop)
		817	{
		818	#if EV_MULTIPLICITY
		819	struct ev_loop *loop = default_loop = &default_loop_struct;
		820	#else
		821	default_loop = 1;
		822	#endif
		823
		824	loop_init (EV_A_ methods);
		825
592	if (ev_method)	826	if (ev_method (EV_A))
593	{	827	{
594	ev_watcher_init (&sigev, sigcb);
595	ev_set_priority (&sigev, EV_MAXPRI);
596	siginit ();	828	siginit (EV_A);
597		829
598	#ifndef WIN32	830	#ifndef WIN32
599	ev_signal_init (&childev, childcb, SIGCHLD);	831	ev_signal_init (&childev, childcb, SIGCHLD);
600	ev_set_priority (&childev, EV_MAXPRI);	832	ev_set_priority (&childev, EV_MAXPRI);
601	ev_signal_start (&childev);	833	ev_signal_start (EV_A_ &childev);
		834	ev_unref (EV_A); /* child watcher should not keep loop alive */
602	#endif	835	#endif
603	}	836	}
		837	else
		838	default_loop = 0;
604	}	839	}
605		840
606	return ev_method;	841	return default_loop;
		842	}
		843
		844	void
		845	ev_default_destroy (void)
		846	{
		847	#if EV_MULTIPLICITY
		848	struct ev_loop *loop = default_loop;
		849	#endif
		850
		851	ev_ref (EV_A); /* child watcher */
		852	ev_signal_stop (EV_A_ &childev);
		853
		854	ev_ref (EV_A); /* signal watcher */
		855	ev_io_stop (EV_A_ &sigev);
		856
		857	close (sigpipe [0]); sigpipe [0] = 0;
		858	close (sigpipe [1]); sigpipe [1] = 0;
		859
		860	loop_destroy (EV_A);
		861	}
		862
		863	void
		864	ev_default_fork (void)
		865	{
		866	#if EV_MULTIPLICITY
		867	struct ev_loop *loop = default_loop;
		868	#endif
		869
		870	if (method)
		871	postfork = 1;
607	}	872	}
608		873
609	/*****************************************************************************/	874	/*****************************************************************************/
610		875
611	void
612	ev_fork_prepare (void)
613	{
614	/* nop */
615	}
616
617	void
618	ev_fork_parent (void)
619	{
620	/* nop */
621	}
622
623	void
624	ev_fork_child (void)
625	{
626	#if EV_USE_EPOLL
627	if (ev_method == EVMETHOD_EPOLL)
628	epoll_postfork_child ();
629	#endif
630
631	ev_io_stop (&sigev);
632	close (sigpipe [0]);
633	close (sigpipe [1]);
634	pipe (sigpipe);
635	siginit ();
636	}
637
638	/*****************************************************************************/
639
640	static void	876	static void
641	call_pending (void)	877	call_pending (EV_P)
642	{	878	{
643	int pri;	879	int pri;
644		880
645	for (pri = NUMPRI; pri--; )	881	for (pri = NUMPRI; pri--; )
646	while (pendingcnt [pri])	882	while (pendingcnt [pri])
…		…
648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	884	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
649		885
650	if (p->w)	886	if (p->w)
651	{	887	{
652	p->w->pending = 0;	888	p->w->pending = 0;
653	p->w->cb (p->w, p->events);	889	p->w->cb (EV_A_ p->w, p->events);
654	}	890	}
655	}	891	}
656	}	892	}
657		893
658	static void	894	static void
659	timers_reify (void)	895	timers_reify (EV_P)
660	{	896	{
661	while (timercnt && timers [0]->at <= now)	897	while (timercnt && ((WT)timers [0])->at <= mn_now)
662	{	898	{
663	struct ev_timer *w = timers [0];	899	struct ev_timer *w = timers [0];
		900
		901	assert (("inactive timer on timer heap detected", ev_is_active (w)));
664		902
665	/* first reschedule or stop timer */	903	/* first reschedule or stop timer */
666	if (w->repeat)	904	if (w->repeat)
667	{	905	{
668	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	906	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
669	w->at = now + w->repeat;	907	((WT)w)->at = mn_now + w->repeat;
670	downheap ((WT *)timers, timercnt, 0);	908	downheap ((WT *)timers, timercnt, 0);
671	}	909	}
672	else	910	else
673	ev_timer_stop (w); /* nonrepeating: stop timer */	911	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
674		912
675	event ((W)w, EV_TIMEOUT);	913	event (EV_A_ (W)w, EV_TIMEOUT);
676	}	914	}
677	}	915	}
678		916
679	static void	917	static void
680	periodics_reify (void)	918	periodics_reify (EV_P)
681	{	919	{
682	while (periodiccnt && periodics [0]->at <= ev_now)	920	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
683	{	921	{
684	struct ev_periodic *w = periodics [0];	922	struct ev_periodic *w = periodics [0];
		923
		924	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
685		925
686	/* first reschedule or stop timer */	926	/* first reschedule or stop timer */
687	if (w->interval)	927	if (w->interval)
688	{	928	{
689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	929	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	930	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
691	downheap ((WT *)periodics, periodiccnt, 0);	931	downheap ((WT *)periodics, periodiccnt, 0);
692	}	932	}
693	else	933	else
694	ev_periodic_stop (w); /* nonrepeating: stop timer */	934	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
695		935
696	event ((W)w, EV_PERIODIC);	936	event (EV_A_ (W)w, EV_PERIODIC);
697	}	937	}
698	}	938	}
699		939
700	static void	940	static void
701	periodics_reschedule (ev_tstamp diff)	941	periodics_reschedule (EV_P)
702	{	942	{
703	int i;	943	int i;
704		944
705	/* adjust periodics after time jump */	945	/* adjust periodics after time jump */
706	for (i = 0; i < periodiccnt; ++i)	946	for (i = 0; i < periodiccnt; ++i)
707	{	947	{
708	struct ev_periodic *w = periodics [i];	948	struct ev_periodic *w = periodics [i];
709		949
710	if (w->interval)	950	if (w->interval)
711	{	951	{
712	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	952	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
713		953
714	if (fabs (diff) >= 1e-4)	954	if (fabs (diff) >= 1e-4)
715	{	955	{
716	ev_periodic_stop (w);	956	ev_periodic_stop (EV_A_ w);
717	ev_periodic_start (w);	957	ev_periodic_start (EV_A_ w);
718		958
719	i = 0; /* restart loop, inefficient, but time jumps should be rare */	959	i = 0; /* restart loop, inefficient, but time jumps should be rare */
720	}	960	}
721	}	961	}
722	}	962	}
723	}	963	}
724		964
725	static int	965	inline int
726	time_update_monotonic (void)	966	time_update_monotonic (EV_P)
727	{	967	{
728	now = get_clock ();	968	mn_now = get_clock ();
729		969
730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	970	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
731	{	971	{
732	ev_now = now + diff;	972	rt_now = rtmn_diff + mn_now;
733	return 0;	973	return 0;
734	}	974	}
735	else	975	else
736	{	976	{
737	now_floor = now;	977	now_floor = mn_now;
738	ev_now = ev_time ();	978	rt_now = ev_time ();
739	return 1;	979	return 1;
740	}	980	}
741	}	981	}
742		982
743	static void	983	static void
744	time_update (void)	984	time_update (EV_P)
745	{	985	{
746	int i;	986	int i;
747		987
748	#if EV_USE_MONOTONIC	988	#if EV_USE_MONOTONIC
749	if (expect_true (have_monotonic))	989	if (expect_true (have_monotonic))
750	{	990	{
751	if (time_update_monotonic ())	991	if (time_update_monotonic (EV_A))
752	{	992	{
753	ev_tstamp odiff = diff;	993	ev_tstamp odiff = rtmn_diff;
754		994
755	for (i = 4; --i; ) /* loop a few times, before making important decisions */	995	for (i = 4; --i; ) /* loop a few times, before making important decisions */
756	{	996	{
757	diff = ev_now - now;	997	rtmn_diff = rt_now - mn_now;
758		998
759	if (fabs (odiff - diff) < MIN_TIMEJUMP)	999	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
760	return; /* all is well */	1000	return; /* all is well */
761		1001
762	ev_now = ev_time ();	1002	rt_now = ev_time ();
763	now = get_clock ();	1003	mn_now = get_clock ();
764	now_floor = now;	1004	now_floor = mn_now;
765	}	1005	}
766		1006
767	periodics_reschedule (diff - odiff);	1007	periodics_reschedule (EV_A);
768	/* no timer adjustment, as the monotonic clock doesn't jump */	1008	/* no timer adjustment, as the monotonic clock doesn't jump */
		1009	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
769	}	1010	}
770	}	1011	}
771	else	1012	else
772	#endif	1013	#endif
773	{	1014	{
774	ev_now = ev_time ();	1015	rt_now = ev_time ();
775		1016
776	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1017	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
777	{	1018	{
778	periodics_reschedule (ev_now - now);	1019	periodics_reschedule (EV_A);
779		1020
780	/* adjust timers. this is easy, as the offset is the same for all */	1021	/* adjust timers. this is easy, as the offset is the same for all */
781	for (i = 0; i < timercnt; ++i)	1022	for (i = 0; i < timercnt; ++i)
782	timers [i]->at += diff;	1023	((WT)timers [i])->at += rt_now - mn_now;
783	}	1024	}
784		1025
785	now = ev_now;	1026	mn_now = rt_now;
786	}	1027	}
787	}	1028	}
788		1029
789	int ev_loop_done;	1030	void
		1031	ev_ref (EV_P)
		1032	{
		1033	++activecnt;
		1034	}
790		1035
		1036	void
		1037	ev_unref (EV_P)
		1038	{
		1039	--activecnt;
		1040	}
		1041
		1042	static int loop_done;
		1043
		1044	void
791	void ev_loop (int flags)	1045	ev_loop (EV_P_ int flags)
792	{	1046	{
793	double block;	1047	double block;
794	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1048	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
795		1049
796	do	1050	do
797	{	1051	{
798	/* queue check watchers (and execute them) */	1052	/* queue check watchers (and execute them) */
799	if (expect_false (preparecnt))	1053	if (expect_false (preparecnt))
800	{	1054	{
801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1055	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
802	call_pending ();	1056	call_pending (EV_A);
803	}	1057	}
804		1058
		1059	/* we might have forked, so reify kernel state if necessary */
		1060	if (expect_false (postfork))
		1061	loop_fork (EV_A);
		1062
805	/* update fd-related kernel structures */	1063	/* update fd-related kernel structures */
806	fd_reify ();	1064	fd_reify (EV_A);
807		1065
808	/* calculate blocking time */	1066	/* calculate blocking time */
809		1067
810	/* we only need this for !monotonic clockor timers, but as we basically	1068	/* we only need this for !monotonic clockor timers, but as we basically
811	always have timers, we just calculate it always */	1069	always have timers, we just calculate it always */
812	#if EV_USE_MONOTONIC	1070	#if EV_USE_MONOTONIC
813	if (expect_true (have_monotonic))	1071	if (expect_true (have_monotonic))
814	time_update_monotonic ();	1072	time_update_monotonic (EV_A);
815	else	1073	else
816	#endif	1074	#endif
817	{	1075	{
818	ev_now = ev_time ();	1076	rt_now = ev_time ();
819	now = ev_now;	1077	mn_now = rt_now;
820	}	1078	}
821		1079
822	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1080	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
823	block = 0.;	1081	block = 0.;
824	else	1082	else
825	{	1083	{
826	block = MAX_BLOCKTIME;	1084	block = MAX_BLOCKTIME;
827		1085
828	if (timercnt)	1086	if (timercnt)
829	{	1087	{
830	ev_tstamp to = timers [0]->at - now + method_fudge;	1088	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
831	if (block > to) block = to;	1089	if (block > to) block = to;
832	}	1090	}
833		1091
834	if (periodiccnt)	1092	if (periodiccnt)
835	{	1093	{
836	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1094	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
837	if (block > to) block = to;	1095	if (block > to) block = to;
838	}	1096	}
839		1097
840	if (block < 0.) block = 0.;	1098	if (block < 0.) block = 0.;
841	}	1099	}
842		1100
843	method_poll (block);	1101	method_poll (EV_A_ block);
844		1102
845	/* update ev_now, do magic */	1103	/* update rt_now, do magic */
846	time_update ();	1104	time_update (EV_A);
847		1105
848	/* queue pending timers and reschedule them */	1106	/* queue pending timers and reschedule them */
849	timers_reify (); /* relative timers called last */	1107	timers_reify (EV_A); /* relative timers called last */
850	periodics_reify (); /* absolute timers called first */	1108	periodics_reify (EV_A); /* absolute timers called first */
851		1109
852	/* queue idle watchers unless io or timers are pending */	1110	/* queue idle watchers unless io or timers are pending */
853	if (!pendingcnt)	1111	if (!pendingcnt)
854	queue_events ((W *)idles, idlecnt, EV_IDLE);	1112	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
855		1113
856	/* queue check watchers, to be executed first */	1114	/* queue check watchers, to be executed first */
857	if (checkcnt)	1115	if (checkcnt)
858	queue_events ((W *)checks, checkcnt, EV_CHECK);	1116	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
859		1117
860	call_pending ();	1118	call_pending (EV_A);
861	}	1119	}
862	while (!ev_loop_done);	1120	while (activecnt && !loop_done);
863		1121
864	if (ev_loop_done != 2)	1122	if (loop_done != 2)
865	ev_loop_done = 0;	1123	loop_done = 0;
		1124	}
		1125
		1126	void
		1127	ev_unloop (EV_P_ int how)
		1128	{
		1129	loop_done = how;
866	}	1130	}
867		1131
868	/*****************************************************************************/	1132	/*****************************************************************************/
869		1133
870	static void	1134	inline void
871	wlist_add (WL *head, WL elem)	1135	wlist_add (WL *head, WL elem)
872	{	1136	{
873	elem->next = *head;	1137	elem->next = *head;
874	*head = elem;	1138	*head = elem;
875	}	1139	}
876		1140
877	static void	1141	inline void
878	wlist_del (WL *head, WL elem)	1142	wlist_del (WL *head, WL elem)
879	{	1143	{
880	while (*head)	1144	while (*head)
881	{	1145	{
882	if (*head == elem)	1146	if (*head == elem)
…		…
887		1151
888	head = &(*head)->next;	1152	head = &(*head)->next;
889	}	1153	}
890	}	1154	}
891		1155
892	static void	1156	inline void
893	ev_clear_pending (W w)	1157	ev_clear_pending (EV_P_ W w)
894	{	1158	{
895	if (w->pending)	1159	if (w->pending)
896	{	1160	{
897	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1161	pendings [ABSPRI (w)][w->pending - 1].w = 0;
898	w->pending = 0;	1162	w->pending = 0;
899	}	1163	}
900	}	1164	}
901		1165
902	static void	1166	inline void
903	ev_start (W w, int active)	1167	ev_start (EV_P_ W w, int active)
904	{	1168	{
905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1169	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1170	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
907		1171
908	w->active = active;	1172	w->active = active;
		1173	ev_ref (EV_A);
909	}	1174	}
910		1175
911	static void	1176	inline void
912	ev_stop (W w)	1177	ev_stop (EV_P_ W w)
913	{	1178	{
		1179	ev_unref (EV_A);
914	w->active = 0;	1180	w->active = 0;
915	}	1181	}
916		1182
917	/*****************************************************************************/	1183	/*****************************************************************************/
918		1184
919	void	1185	void
920	ev_io_start (struct ev_io *w)	1186	ev_io_start (EV_P_ struct ev_io *w)
921	{	1187	{
922	int fd = w->fd;	1188	int fd = w->fd;
923		1189
924	if (ev_is_active (w))	1190	if (ev_is_active (w))
925	return;	1191	return;
926		1192
927	assert (("ev_io_start called with negative fd", fd >= 0));	1193	assert (("ev_io_start called with negative fd", fd >= 0));
928		1194
929	ev_start ((W)w, 1);	1195	ev_start (EV_A_ (W)w, 1);
930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1196	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
931	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1197	wlist_add ((WL *)&anfds[fd].head, (WL)w);
932		1198
933	fd_change (fd);	1199	fd_change (EV_A_ fd);
934	}	1200	}
935		1201
936	void	1202	void
937	ev_io_stop (struct ev_io *w)	1203	ev_io_stop (EV_P_ struct ev_io *w)
938	{	1204	{
939	ev_clear_pending ((W)w);	1205	ev_clear_pending (EV_A_ (W)w);
940	if (!ev_is_active (w))	1206	if (!ev_is_active (w))
941	return;	1207	return;
942		1208
943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1209	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
944	ev_stop ((W)w);	1210	ev_stop (EV_A_ (W)w);
945		1211
946	fd_change (w->fd);	1212	fd_change (EV_A_ w->fd);
947	}	1213	}
948		1214
949	void	1215	void
950	ev_timer_start (struct ev_timer *w)	1216	ev_timer_start (EV_P_ struct ev_timer *w)
951	{	1217	{
952	if (ev_is_active (w))	1218	if (ev_is_active (w))
953	return;	1219	return;
954		1220
955	w->at += now;	1221	((WT)w)->at += mn_now;
956		1222
957	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1223	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
958		1224
959	ev_start ((W)w, ++timercnt);	1225	ev_start (EV_A_ (W)w, ++timercnt);
960	array_needsize (timers, timermax, timercnt, );	1226	array_needsize (timers, timermax, timercnt, );
961	timers [timercnt - 1] = w;	1227	timers [timercnt - 1] = w;
962	upheap ((WT *)timers, timercnt - 1);	1228	upheap ((WT *)timers, timercnt - 1);
963	}
964		1229
		1230	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1231	}
		1232
965	void	1233	void
966	ev_timer_stop (struct ev_timer *w)	1234	ev_timer_stop (EV_P_ struct ev_timer *w)
967	{	1235	{
968	ev_clear_pending ((W)w);	1236	ev_clear_pending (EV_A_ (W)w);
969	if (!ev_is_active (w))	1237	if (!ev_is_active (w))
970	return;	1238	return;
971		1239
		1240	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1241
972	if (w->active < timercnt--)	1242	if (((W)w)->active < timercnt--)
973	{	1243	{
974	timers [w->active - 1] = timers [timercnt];	1244	timers [((W)w)->active - 1] = timers [timercnt];
975	downheap ((WT *)timers, timercnt, w->active - 1);	1245	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
976	}	1246	}
977		1247
978	w->at = w->repeat;	1248	((WT)w)->at = w->repeat;
979		1249
980	ev_stop ((W)w);	1250	ev_stop (EV_A_ (W)w);
981	}	1251	}
982		1252
983	void	1253	void
984	ev_timer_again (struct ev_timer *w)	1254	ev_timer_again (EV_P_ struct ev_timer *w)
985	{	1255	{
986	if (ev_is_active (w))	1256	if (ev_is_active (w))
987	{	1257	{
988	if (w->repeat)	1258	if (w->repeat)
989	{	1259	{
990	w->at = now + w->repeat;	1260	((WT)w)->at = mn_now + w->repeat;
991	downheap ((WT *)timers, timercnt, w->active - 1);	1261	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
992	}	1262	}
993	else	1263	else
994	ev_timer_stop (w);	1264	ev_timer_stop (EV_A_ w);
995	}	1265	}
996	else if (w->repeat)	1266	else if (w->repeat)
997	ev_timer_start (w);	1267	ev_timer_start (EV_A_ w);
998	}	1268	}
999		1269
1000	void	1270	void
1001	ev_periodic_start (struct ev_periodic *w)	1271	ev_periodic_start (EV_P_ struct ev_periodic *w)
1002	{	1272	{
1003	if (ev_is_active (w))	1273	if (ev_is_active (w))
1004	return;	1274	return;
1005		1275
1006	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1276	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1007		1277
1008	/* this formula differs from the one in periodic_reify because we do not always round up */	1278	/* this formula differs from the one in periodic_reify because we do not always round up */
1009	if (w->interval)	1279	if (w->interval)
1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1280	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1011		1281
1012	ev_start ((W)w, ++periodiccnt);	1282	ev_start (EV_A_ (W)w, ++periodiccnt);
1013	array_needsize (periodics, periodicmax, periodiccnt, );	1283	array_needsize (periodics, periodicmax, periodiccnt, );
1014	periodics [periodiccnt - 1] = w;	1284	periodics [periodiccnt - 1] = w;
1015	upheap ((WT *)periodics, periodiccnt - 1);	1285	upheap ((WT *)periodics, periodiccnt - 1);
1016	}
1017		1286
		1287	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1288	}
		1289
1018	void	1290	void
1019	ev_periodic_stop (struct ev_periodic *w)	1291	ev_periodic_stop (EV_P_ struct ev_periodic *w)
1020	{	1292	{
1021	ev_clear_pending ((W)w);	1293	ev_clear_pending (EV_A_ (W)w);
1022	if (!ev_is_active (w))	1294	if (!ev_is_active (w))
1023	return;	1295	return;
1024		1296
		1297	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1298
1025	if (w->active < periodiccnt--)	1299	if (((W)w)->active < periodiccnt--)
1026	{	1300	{
1027	periodics [w->active - 1] = periodics [periodiccnt];	1301	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1028	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1302	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1029	}	1303	}
1030		1304
1031	ev_stop ((W)w);	1305	ev_stop (EV_A_ (W)w);
		1306	}
		1307
		1308	void
		1309	ev_idle_start (EV_P_ struct ev_idle *w)
		1310	{
		1311	if (ev_is_active (w))
		1312	return;
		1313
		1314	ev_start (EV_A_ (W)w, ++idlecnt);
		1315	array_needsize (idles, idlemax, idlecnt, );
		1316	idles [idlecnt - 1] = w;
		1317	}
		1318
		1319	void
		1320	ev_idle_stop (EV_P_ struct ev_idle *w)
		1321	{
		1322	ev_clear_pending (EV_A_ (W)w);
		1323	if (ev_is_active (w))
		1324	return;
		1325
		1326	idles [((W)w)->active - 1] = idles [--idlecnt];
		1327	ev_stop (EV_A_ (W)w);
		1328	}
		1329
		1330	void
		1331	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1332	{
		1333	if (ev_is_active (w))
		1334	return;
		1335
		1336	ev_start (EV_A_ (W)w, ++preparecnt);
		1337	array_needsize (prepares, preparemax, preparecnt, );
		1338	prepares [preparecnt - 1] = w;
		1339	}
		1340
		1341	void
		1342	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1343	{
		1344	ev_clear_pending (EV_A_ (W)w);
		1345	if (ev_is_active (w))
		1346	return;
		1347
		1348	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1349	ev_stop (EV_A_ (W)w);
		1350	}
		1351
		1352	void
		1353	ev_check_start (EV_P_ struct ev_check *w)
		1354	{
		1355	if (ev_is_active (w))
		1356	return;
		1357
		1358	ev_start (EV_A_ (W)w, ++checkcnt);
		1359	array_needsize (checks, checkmax, checkcnt, );
		1360	checks [checkcnt - 1] = w;
		1361	}
		1362
		1363	void
		1364	ev_check_stop (EV_P_ struct ev_check *w)
		1365	{
		1366	ev_clear_pending (EV_A_ (W)w);
		1367	if (ev_is_active (w))
		1368	return;
		1369
		1370	checks [((W)w)->active - 1] = checks [--checkcnt];
		1371	ev_stop (EV_A_ (W)w);
1032	}	1372	}
1033		1373
1034	#ifndef SA_RESTART	1374	#ifndef SA_RESTART
1035	# define SA_RESTART 0	1375	# define SA_RESTART 0
1036	#endif	1376	#endif
1037		1377
1038	void	1378	void
1039	ev_signal_start (struct ev_signal *w)	1379	ev_signal_start (EV_P_ struct ev_signal *w)
1040	{	1380	{
		1381	#if EV_MULTIPLICITY
		1382	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1383	#endif
1041	if (ev_is_active (w))	1384	if (ev_is_active (w))
1042	return;	1385	return;
1043		1386
1044	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1387	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1045		1388
1046	ev_start ((W)w, 1);	1389	ev_start (EV_A_ (W)w, 1);
1047	array_needsize (signals, signalmax, w->signum, signals_init);	1390	array_needsize (signals, signalmax, w->signum, signals_init);
1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1391	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1049		1392
1050	if (!w->next)	1393	if (!((WL)w)->next)
1051	{	1394	{
		1395	#if WIN32
		1396	signal (w->signum, sighandler);
		1397	#else
1052	struct sigaction sa;	1398	struct sigaction sa;
1053	sa.sa_handler = sighandler;	1399	sa.sa_handler = sighandler;
1054	sigfillset (&sa.sa_mask);	1400	sigfillset (&sa.sa_mask);
1055	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1401	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1056	sigaction (w->signum, &sa, 0);	1402	sigaction (w->signum, &sa, 0);
		1403	#endif
1057	}	1404	}
1058	}	1405	}
1059		1406
1060	void	1407	void
1061	ev_signal_stop (struct ev_signal *w)	1408	ev_signal_stop (EV_P_ struct ev_signal *w)
1062	{	1409	{
1063	ev_clear_pending ((W)w);	1410	ev_clear_pending (EV_A_ (W)w);
1064	if (!ev_is_active (w))	1411	if (!ev_is_active (w))
1065	return;	1412	return;
1066		1413
1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1414	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1068	ev_stop ((W)w);	1415	ev_stop (EV_A_ (W)w);
1069		1416
1070	if (!signals [w->signum - 1].head)	1417	if (!signals [w->signum - 1].head)
1071	signal (w->signum, SIG_DFL);	1418	signal (w->signum, SIG_DFL);
1072	}	1419	}
1073		1420
1074	void	1421	void
1075	ev_idle_start (struct ev_idle *w)	1422	ev_child_start (EV_P_ struct ev_child *w)
1076	{	1423	{
		1424	#if EV_MULTIPLICITY
		1425	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1426	#endif
1077	if (ev_is_active (w))	1427	if (ev_is_active (w))
1078	return;	1428	return;
1079		1429
1080	ev_start ((W)w, ++idlecnt);	1430	ev_start (EV_A_ (W)w, 1);
1081	array_needsize (idles, idlemax, idlecnt, );	1431	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1082	idles [idlecnt - 1] = w;
1083	}	1432	}
1084		1433
1085	void	1434	void
1086	ev_idle_stop (struct ev_idle *w)	1435	ev_child_stop (EV_P_ struct ev_child *w)
1087	{	1436	{
1088	ev_clear_pending ((W)w);	1437	ev_clear_pending (EV_A_ (W)w);
1089	if (ev_is_active (w))	1438	if (ev_is_active (w))
1090	return;	1439	return;
1091		1440
1092	idles [w->active - 1] = idles [--idlecnt];
1093	ev_stop ((W)w);
1094	}
1095
1096	void
1097	ev_prepare_start (struct ev_prepare *w)
1098	{
1099	if (ev_is_active (w))
1100	return;
1101
1102	ev_start ((W)w, ++preparecnt);
1103	array_needsize (prepares, preparemax, preparecnt, );
1104	prepares [preparecnt - 1] = w;
1105	}
1106
1107	void
1108	ev_prepare_stop (struct ev_prepare *w)
1109	{
1110	ev_clear_pending ((W)w);
1111	if (ev_is_active (w))
1112	return;
1113
1114	prepares [w->active - 1] = prepares [--preparecnt];
1115	ev_stop ((W)w);
1116	}
1117
1118	void
1119	ev_check_start (struct ev_check *w)
1120	{
1121	if (ev_is_active (w))
1122	return;
1123
1124	ev_start ((W)w, ++checkcnt);
1125	array_needsize (checks, checkmax, checkcnt, );
1126	checks [checkcnt - 1] = w;
1127	}
1128
1129	void
1130	ev_check_stop (struct ev_check *w)
1131	{
1132	ev_clear_pending ((W)w);
1133	if (ev_is_active (w))
1134	return;
1135
1136	checks [w->active - 1] = checks [--checkcnt];
1137	ev_stop ((W)w);
1138	}
1139
1140	void
1141	ev_child_start (struct ev_child *w)
1142	{
1143	if (ev_is_active (w))
1144	return;
1145
1146	ev_start ((W)w, 1);
1147	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1148	}
1149
1150	void
1151	ev_child_stop (struct ev_child *w)
1152	{
1153	ev_clear_pending ((W)w);
1154	if (ev_is_active (w))
1155	return;
1156
1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1441	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1158	ev_stop ((W)w);	1442	ev_stop (EV_A_ (W)w);
1159	}	1443	}
1160		1444
1161	/*****************************************************************************/	1445	/*****************************************************************************/
1162		1446
1163	struct ev_once	1447	struct ev_once
…		…
1167	void (cb)(int revents, void arg);	1451	void (cb)(int revents, void arg);
1168	void *arg;	1452	void *arg;
1169	};	1453	};
1170		1454
1171	static void	1455	static void
1172	once_cb (struct ev_once *once, int revents)	1456	once_cb (EV_P_ struct ev_once *once, int revents)
1173	{	1457	{
1174	void (cb)(int revents, void arg) = once->cb;	1458	void (cb)(int revents, void arg) = once->cb;
1175	void *arg = once->arg;	1459	void *arg = once->arg;
1176		1460
1177	ev_io_stop (&once->io);	1461	ev_io_stop (EV_A_ &once->io);
1178	ev_timer_stop (&once->to);	1462	ev_timer_stop (EV_A_ &once->to);
1179	free (once);	1463	ev_free (once);
1180		1464
1181	cb (revents, arg);	1465	cb (revents, arg);
1182	}	1466	}
1183		1467
1184	static void	1468	static void
1185	once_cb_io (struct ev_io *w, int revents)	1469	once_cb_io (EV_P_ struct ev_io *w, int revents)
1186	{	1470	{
1187	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1471	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1188	}	1472	}
1189		1473
1190	static void	1474	static void
1191	once_cb_to (struct ev_timer *w, int revents)	1475	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1192	{	1476	{
1193	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1477	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1194	}	1478	}
1195		1479
1196	void	1480	void
1197	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1481	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1198	{	1482	{
1199	struct ev_once *once = malloc (sizeof (struct ev_once));	1483	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1200		1484
1201	if (!once)	1485	if (!once)
1202	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1486	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1203	else	1487	else
1204	{	1488	{
…		…
1207		1491
1208	ev_watcher_init (&once->io, once_cb_io);	1492	ev_watcher_init (&once->io, once_cb_io);
1209	if (fd >= 0)	1493	if (fd >= 0)
1210	{	1494	{
1211	ev_io_set (&once->io, fd, events);	1495	ev_io_set (&once->io, fd, events);
1212	ev_io_start (&once->io);	1496	ev_io_start (EV_A_ &once->io);
1213	}	1497	}
1214		1498
1215	ev_watcher_init (&once->to, once_cb_to);	1499	ev_watcher_init (&once->to, once_cb_to);
1216	if (timeout >= 0.)	1500	if (timeout >= 0.)
1217	{	1501	{
1218	ev_timer_set (&once->to, timeout, 0.);	1502	ev_timer_set (&once->to, timeout, 0.);
1219	ev_timer_start (&once->to);	1503	ev_timer_start (EV_A_ &once->to);
1220	}	1504	}
1221	}	1505	}
1222	}	1506	}
1223		1507
1224	/*****************************************************************************/
1225
1226	#if 0
1227
1228	struct ev_io wio;
1229
1230	static void
1231	sin_cb (struct ev_io *w, int revents)
1232	{
1233	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1234	}
1235
1236	static void
1237	ocb (struct ev_timer *w, int revents)
1238	{
1239	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1240	ev_timer_stop (w);
1241	ev_timer_start (w);
1242	}
1243
1244	static void
1245	scb (struct ev_signal *w, int revents)
1246	{
1247	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1248	ev_io_stop (&wio);
1249	ev_io_start (&wio);
1250	}
1251
1252	static void
1253	gcb (struct ev_signal *w, int revents)
1254	{
1255	fprintf (stderr, "generic %x\n", revents);
1256
1257	}
1258
1259	int main (void)
1260	{
1261	ev_init (0);
1262
1263	ev_io_init (&wio, sin_cb, 0, EV_READ);
1264	ev_io_start (&wio);
1265
1266	struct ev_timer t[10000];
1267
1268	#if 0
1269	int i;
1270	for (i = 0; i < 10000; ++i)
1271	{
1272	struct ev_timer *w = t + i;
1273	ev_watcher_init (w, ocb, i);
1274	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1275	ev_timer_start (w);
1276	if (drand48 () < 0.5)
1277	ev_timer_stop (w);
1278	}
1279	#endif
1280
1281	struct ev_timer t1;
1282	ev_timer_init (&t1, ocb, 5, 10);
1283	ev_timer_start (&t1);
1284
1285	struct ev_signal sig;
1286	ev_signal_init (&sig, scb, SIGQUIT);
1287	ev_signal_start (&sig);
1288
1289	struct ev_check cw;
1290	ev_check_init (&cw, gcb);
1291	ev_check_start (&cw);
1292
1293	struct ev_idle iw;
1294	ev_idle_init (&iw, gcb);
1295	ev_idle_start (&iw);
1296
1297	ev_loop (0);
1298
1299	return 0;
1300	}
1301
1302	#endif
1303
1304
1305
1306

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Comparing libev/ev.c (file contents): Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs. Revision 1.70 by root, Tue Nov 6 00:52:32 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs.
Revision 1.70 by root, Tue Nov 6 00:52:32 2007 UTC