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

Comparing libev/ev.c (file contents):
Revision 1.41 by root, Fri Nov 2 16:54:34 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 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
		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>
…		…
42	#include <stdio.h>	64	#include <stdio.h>
43		65
44	#include <assert.h>	66	#include <assert.h>
45	#include <errno.h>	67	#include <errno.h>
46	#include <sys/types.h>	68	#include <sys/types.h>
		69	#ifndef WIN32
47	#include <sys/wait.h>	70	# include <sys/wait.h>
		71	#endif
48	#include <sys/time.h>	72	#include <sys/time.h>
49	#include <time.h>	73	#include <time.h>
50		74
51	/**/	75	/**/
52		76
…		…
62	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */	86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
63	#endif	87	#endif
64		88
65	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
66	# define EV_USE_EPOLL 0	90	# define EV_USE_EPOLL 0
		91	#endif
		92
		93	#ifndef EV_USE_KQUEUE
		94	# define EV_USE_KQUEUE 0
67	#endif	95	#endif
68		96
69	#ifndef EV_USE_REALTIME	97	#ifndef EV_USE_REALTIME
70	# define EV_USE_REALTIME 1	98	# define EV_USE_REALTIME 1
71	#endif	99	#endif
…		…
100	#endif	128	#endif
101		129
102	#define expect_false(expr) expect ((expr) != 0, 0)	130	#define expect_false(expr) expect ((expr) != 0, 0)
103	#define expect_true(expr) expect ((expr) != 0, 1)	131	#define expect_true(expr) expect ((expr) != 0, 1)
104		132
		133	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		134	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		135
105	typedef struct ev_watcher *W;	136	typedef struct ev_watcher *W;
106	typedef struct ev_watcher_list *WL;	137	typedef struct ev_watcher_list *WL;
107	typedef struct ev_watcher_time *WT;	138	typedef struct ev_watcher_time *WT;
108		139
109	static ev_tstamp now_floor, now, diff; /* monotonic clock */	140	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		141
119	/*****************************************************************************/	142	/*****************************************************************************/
120		143
121	ev_tstamp	144	typedef struct
		145	{
		146	struct ev_watcher_list *head;
		147	unsigned char events;
		148	unsigned char reify;
		149	} ANFD;
		150
		151	typedef struct
		152	{
		153	W w;
		154	int events;
		155	} ANPENDING;
		156
		157	#if EV_MULTIPLICITY
		158
		159	struct ev_loop
		160	{
		161	# define VAR(name,decl) decl;
		162	# include "ev_vars.h"
		163	};
		164	# undef VAR
		165	# include "ev_wrap.h"
		166
		167	#else
		168
		169	# define VAR(name,decl) static decl;
		170	# include "ev_vars.h"
		171	# undef VAR
		172
		173	#endif
		174
		175	/*****************************************************************************/
		176
		177	inline ev_tstamp
122	ev_time (void)	178	ev_time (void)
123	{	179	{
124	#if EV_USE_REALTIME	180	#if EV_USE_REALTIME
125	struct timespec ts;	181	struct timespec ts;
126	clock_gettime (CLOCK_REALTIME, &ts);	182	clock_gettime (CLOCK_REALTIME, &ts);
…		…
130	gettimeofday (&tv, 0);	186	gettimeofday (&tv, 0);
131	return tv.tv_sec + tv.tv_usec * 1e-6;	187	return tv.tv_sec + tv.tv_usec * 1e-6;
132	#endif	188	#endif
133	}	189	}
134		190
135	static ev_tstamp	191	inline ev_tstamp
136	get_clock (void)	192	get_clock (void)
137	{	193	{
138	#if EV_USE_MONOTONIC	194	#if EV_USE_MONOTONIC
139	if (expect_true (have_monotonic))	195	if (expect_true (have_monotonic))
140	{	196	{
…		…
143	return ts.tv_sec + ts.tv_nsec * 1e-9;	199	return ts.tv_sec + ts.tv_nsec * 1e-9;
144	}	200	}
145	#endif	201	#endif
146		202
147	return ev_time ();	203	return ev_time ();
		204	}
		205
		206	ev_tstamp
		207	ev_now (EV_P)
		208	{
		209	return rt_now;
148	}	210	}
149		211
150	#define array_roundsize(base,n) ((n) \| 4 & ~3)	212	#define array_roundsize(base,n) ((n) \| 4 & ~3)
151		213
152	#define array_needsize(base,cur,cnt,init) \	214	#define array_needsize(base,cur,cnt,init) \
…		…
164	cur = newcnt; \	226	cur = newcnt; \
165	}	227	}
166		228
167	/*****************************************************************************/	229	/*****************************************************************************/
168		230
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	231	static void
180	anfds_init (ANFD *base, int count)	232	anfds_init (ANFD *base, int count)
181	{	233	{
182	while (count--)	234	while (count--)
183	{	235	{
…		…
187		239
188	++base;	240	++base;
189	}	241	}
190	}	242	}
191		243
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	244	static void
202	event (W w, int events)	245	event (EV_P_ W w, int events)
203	{	246	{
204	if (w->pending)	247	if (w->pending)
205	{	248	{
206	pendings [w->pending - 1].events \|= events;	249	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
207	return;	250	return;
208	}	251	}
209		252
210	w->pending = ++pendingcnt;	253	w->pending = ++pendingcnt [ABSPRI (w)];
211	array_needsize (pendings, pendingmax, pendingcnt, );	254	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
212	pendings [pendingcnt - 1].w = w;	255	pendings [ABSPRI (w)][w->pending - 1].w = w;
213	pendings [pendingcnt - 1].events = events;	256	pendings [ABSPRI (w)][w->pending - 1].events = events;
214	}	257	}
215		258
216	static void	259	static void
217	queue_events (W *events, int eventcnt, int type)	260	queue_events (EV_P_ W *events, int eventcnt, int type)
218	{	261	{
219	int i;	262	int i;
220		263
221	for (i = 0; i < eventcnt; ++i)	264	for (i = 0; i < eventcnt; ++i)
222	event (events [i], type);	265	event (EV_A_ events [i], type);
223	}	266	}
224		267
225	static void	268	static void
226	fd_event (int fd, int events)	269	fd_event (EV_P_ int fd, int events)
227	{	270	{
228	ANFD *anfd = anfds + fd;	271	ANFD *anfd = anfds + fd;
229	struct ev_io *w;	272	struct ev_io *w;
230		273
231	for (w = anfd->head; w; w = w->next)	274	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
232	{	275	{
233	int ev = w->events & events;	276	int ev = w->events & events;
234		277
235	if (ev)	278	if (ev)
236	event ((W)w, ev);	279	event (EV_A_ (W)w, ev);
237	}	280	}
238	}	281	}
239		282
240	/*****************************************************************************/	283	/*****************************************************************************/
241		284
242	static int *fdchanges;
243	static int fdchangemax, fdchangecnt;
244
245	static void	285	static void
246	fd_reify (void)	286	fd_reify (EV_P)
247	{	287	{
248	int i;	288	int i;
249		289
250	for (i = 0; i < fdchangecnt; ++i)	290	for (i = 0; i < fdchangecnt; ++i)
251	{	291	{
…		…
253	ANFD *anfd = anfds + fd;	293	ANFD *anfd = anfds + fd;
254	struct ev_io *w;	294	struct ev_io *w;
255		295
256	int events = 0;	296	int events = 0;
257		297
258	for (w = anfd->head; w; w = w->next)	298	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
259	events \|= w->events;	299	events \|= w->events;
260		300
261	anfd->reify = 0;	301	anfd->reify = 0;
262		302
263	if (anfd->events != events)	303	if (anfd->events != events)
264	{	304	{
265	method_modify (fd, anfd->events, events);	305	method_modify (EV_A_ fd, anfd->events, events);
266	anfd->events = events;	306	anfd->events = events;
267	}	307	}
268	}	308	}
269		309
270	fdchangecnt = 0;	310	fdchangecnt = 0;
271	}	311	}
272		312
273	static void	313	static void
274	fd_change (int fd)	314	fd_change (EV_P_ int fd)
275	{	315	{
276	if (anfds [fd].reify \|\| fdchangecnt < 0)	316	if (anfds [fd].reify \|\| fdchangecnt < 0)
277	return;	317	return;
278		318
279	anfds [fd].reify = 1;	319	anfds [fd].reify = 1;
…		…
282	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	322	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
283	fdchanges [fdchangecnt - 1] = fd;	323	fdchanges [fdchangecnt - 1] = fd;
284	}	324	}
285		325
286	static void	326	static void
287	fd_kill (int fd)	327	fd_kill (EV_P_ int fd)
288	{	328	{
289	struct ev_io *w;	329	struct ev_io *w;
290		330
291	printf ("killing fd %d\n", fd);//D
292	while ((w = anfds [fd].head))	331	while ((w = (struct ev_io *)anfds [fd].head))
293	{	332	{
294	ev_io_stop (w);	333	ev_io_stop (EV_A_ w);
295	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);	334	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
296	}	335	}
297	}	336	}
298		337
299	/* called on EBADF to verify fds */	338	/* called on EBADF to verify fds */
300	static void	339	static void
301	fd_ebadf (void)	340	fd_ebadf (EV_P)
302	{	341	{
303	int fd;	342	int fd;
304		343
305	for (fd = 0; fd < anfdmax; ++fd)	344	for (fd = 0; fd < anfdmax; ++fd)
306	if (anfds [fd].events)	345	if (anfds [fd].events)
307	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	346	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
308	fd_kill (fd);	347	fd_kill (EV_A_ fd);
309	}	348	}
310		349
311	/* called on ENOMEM in select/poll to kill some fds and retry */	350	/* called on ENOMEM in select/poll to kill some fds and retry */
312	static void	351	static void
313	fd_enomem (void)	352	fd_enomem (EV_P)
314	{	353	{
315	int fd = anfdmax;	354	int fd = anfdmax;
316		355
317	while (fd--)	356	while (fd--)
318	if (anfds [fd].events)	357	if (anfds [fd].events)
319	{	358	{
320	close (fd);	359	close (fd);
321	fd_kill (fd);	360	fd_kill (EV_A_ fd);
322	return;	361	return;
323	}	362	}
324	}	363	}
325		364
		365	/* susually called after fork if method needs to re-arm all fds from scratch */
		366	static void
		367	fd_rearm_all (EV_P)
		368	{
		369	int fd;
		370
		371	/* this should be highly optimised to not do anything but set a flag */
		372	for (fd = 0; fd < anfdmax; ++fd)
		373	if (anfds [fd].events)
		374	{
		375	anfds [fd].events = 0;
		376	fd_change (EV_A_ fd);
		377	}
		378	}
		379
326	/*****************************************************************************/	380	/*****************************************************************************/
327		381
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	382	static void
335	upheap (WT *timers, int k)	383	upheap (WT *heap, int k)
336	{	384	{
337	WT w = timers [k];	385	WT w = heap [k];
338		386
339	while (k && timers [k >> 1]->at > w->at)	387	while (k && heap [k >> 1]->at > w->at)
340	{	388	{
341	timers [k] = timers [k >> 1];	389	heap [k] = heap [k >> 1];
342	timers [k]->active = k + 1;	390	heap [k]->active = k + 1;
343	k >>= 1;	391	k >>= 1;
344	}	392	}
345		393
346	timers [k] = w;	394	heap [k] = w;
347	timers [k]->active = k + 1;	395	heap [k]->active = k + 1;
348		396
349	}	397	}
350		398
351	static void	399	static void
352	downheap (WT *timers, int N, int k)	400	downheap (WT *heap, int N, int k)
353	{	401	{
354	WT w = timers [k];	402	WT w = heap [k];
355		403
356	while (k < (N >> 1))	404	while (k < (N >> 1))
357	{	405	{
358	int j = k << 1;	406	int j = k << 1;
359		407
360	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	408	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
361	++j;	409	++j;
362		410
363	if (w->at <= timers [j]->at)	411	if (w->at <= heap [j]->at)
364	break;	412	break;
365		413
366	timers [k] = timers [j];	414	heap [k] = heap [j];
367	timers [k]->active = k + 1;	415	heap [k]->active = k + 1;
368	k = j;	416	k = j;
369	}	417	}
370		418
371	timers [k] = w;	419	heap [k] = w;
372	timers [k]->active = k + 1;	420	heap [k]->active = k + 1;
373	}	421	}
374		422
375	/*****************************************************************************/	423	/*****************************************************************************/
376		424
377	typedef struct	425	typedef struct
378	{	426	{
379	struct ev_signal *head;	427	struct ev_watcher_list *head;
380	sig_atomic_t volatile gotsig;	428	sig_atomic_t volatile gotsig;
381	} ANSIG;	429	} ANSIG;
382		430
383	static ANSIG *signals;	431	static ANSIG *signals;
384	static int signalmax;	432	static int signalmax;
…		…
404	{	452	{
405	signals [signum - 1].gotsig = 1;	453	signals [signum - 1].gotsig = 1;
406		454
407	if (!gotsig)	455	if (!gotsig)
408	{	456	{
		457	int old_errno = errno;
409	gotsig = 1;	458	gotsig = 1;
410	write (sigpipe [1], &signum, 1);	459	write (sigpipe [1], &signum, 1);
		460	errno = old_errno;
411	}	461	}
412	}	462	}
413		463
414	static void	464	static void
415	sigcb (struct ev_io *iow, int revents)	465	sigcb (EV_P_ struct ev_io *iow, int revents)
416	{	466	{
417	struct ev_signal *w;	467	struct ev_watcher_list *w;
418	int signum;	468	int signum;
419		469
420	read (sigpipe [0], &revents, 1);	470	read (sigpipe [0], &revents, 1);
421	gotsig = 0;	471	gotsig = 0;
422		472
…		…
424	if (signals [signum].gotsig)	474	if (signals [signum].gotsig)
425	{	475	{
426	signals [signum].gotsig = 0;	476	signals [signum].gotsig = 0;
427		477
428	for (w = signals [signum].head; w; w = w->next)	478	for (w = signals [signum].head; w; w = w->next)
429	event ((W)w, EV_SIGNAL);	479	event (EV_A_ (W)w, EV_SIGNAL);
430	}	480	}
431	}	481	}
432		482
433	static void	483	static void
434	siginit (void)	484	siginit (EV_P)
435	{	485	{
		486	#ifndef WIN32
436	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	487	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
437	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	488	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
438		489
439	/* rather than sort out wether we really need nb, set it */	490	/* rather than sort out wether we really need nb, set it */
440	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	491	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
441	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	492	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		493	#endif
442		494
443	ev_io_set (&sigev, sigpipe [0], EV_READ);	495	ev_io_set (&sigev, sigpipe [0], EV_READ);
444	ev_io_start (&sigev);	496	ev_io_start (EV_A_ &sigev);
		497	ev_unref (EV_A); /* child watcher should not keep loop alive */
445	}	498	}
446		499
447	/*****************************************************************************/	500	/*****************************************************************************/
448		501
449	static struct ev_idle **idles;	502	#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		503
460	static struct ev_child *childs [PID_HASHSIZE];	504	static struct ev_child *childs [PID_HASHSIZE];
461	static struct ev_signal childev;	505	static struct ev_signal childev;
462		506
463	#ifndef WCONTINUED	507	#ifndef WCONTINUED
464	# define WCONTINUED 0	508	# define WCONTINUED 0
465	#endif	509	#endif
466		510
467	static void	511	static void
468	childcb (struct ev_signal *sw, int revents)	512	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
469	{	513	{
470	struct ev_child *w;	514	struct ev_child *w;
		515
		516	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		517	if (w->pid == pid \|\| !w->pid)
		518	{
		519	w->priority = sw->priority; /* need to do it now */
		520	w->rpid = pid;
		521	w->rstatus = status;
		522	event (EV_A_ (W)w, EV_CHILD);
		523	}
		524	}
		525
		526	static void
		527	childcb (EV_P_ struct ev_signal *sw, int revents)
		528	{
471	int pid, status;	529	int pid, status;
472		530
473	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	531	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
474	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	532	{
475	if (w->pid == pid \|\| !w->pid)	533	/* make sure we are called again until all childs have been reaped */
476	{	534	event (EV_A_ (W)sw, EV_SIGNAL);
477	w->status = status;	535
478	event ((W)w, EV_CHILD);	536	child_reap (EV_A_ sw, pid, pid, status);
479	}	537	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		538	}
480	}	539	}
		540
		541	#endif
481		542
482	/*****************************************************************************/	543	/*****************************************************************************/
483		544
		545	#if EV_USE_KQUEUE
		546	# include "ev_kqueue.c"
		547	#endif
484	#if EV_USE_EPOLL	548	#if EV_USE_EPOLL
485	# include "ev_epoll.c"	549	# include "ev_epoll.c"
486	#endif	550	#endif
487	#if EV_USE_POLL	551	#if EV_USE_POLL
488	# include "ev_poll.c"	552	# include "ev_poll.c"
…		…
501	ev_version_minor (void)	565	ev_version_minor (void)
502	{	566	{
503	return EV_VERSION_MINOR;	567	return EV_VERSION_MINOR;
504	}	568	}
505		569
506	/* return true if we are running with elevated privileges and ignore env variables */	570	/* return true if we are running with elevated privileges and should ignore env variables */
507	static int	571	static int
508	enable_secure ()	572	enable_secure (void)
509	{	573	{
		574	#ifdef WIN32
		575	return 0;
		576	#else
510	return getuid () != geteuid ()	577	return getuid () != geteuid ()
511	\|\| getgid () != getegid ();	578	\|\| getgid () != getegid ();
		579	#endif
512	}	580	}
513		581
514	int ev_init (int methods)	582	int
		583	ev_method (EV_P)
515	{	584	{
		585	return method;
		586	}
		587
		588	static void
		589	loop_init (EV_P_ int methods)
		590	{
516	if (!ev_method)	591	if (!method)
517	{	592	{
518	#if EV_USE_MONOTONIC	593	#if EV_USE_MONOTONIC
519	{	594	{
520	struct timespec ts;	595	struct timespec ts;
521	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	596	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
522	have_monotonic = 1;	597	have_monotonic = 1;
523	}	598	}
524	#endif	599	#endif
525		600
526	ev_now = ev_time ();	601	rt_now = ev_time ();
527	now = get_clock ();	602	mn_now = get_clock ();
528	now_floor = now;	603	now_floor = mn_now;
529	diff = ev_now - now;	604	rtmn_diff = rt_now - mn_now;
530
531	if (pipe (sigpipe))
532	return 0;
533		605
534	if (methods == EVMETHOD_AUTO)	606	if (methods == EVMETHOD_AUTO)
535	if (!enable_secure () && getenv ("LIBEV_METHODS"))	607	if (!enable_secure () && getenv ("LIBEV_METHODS"))
536	methods = atoi (getenv ("LIBEV_METHODS"));	608	methods = atoi (getenv ("LIBEV_METHODS"));
537	else	609	else
538	methods = EVMETHOD_ANY;	610	methods = EVMETHOD_ANY;
539		611
540	ev_method = 0;	612	method = 0;
		613	#if EV_USE_KQUEUE
		614	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		615	#endif
541	#if EV_USE_EPOLL	616	#if EV_USE_EPOLL
542	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	617	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
543	#endif	618	#endif
544	#if EV_USE_POLL	619	#if EV_USE_POLL
545	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	620	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
546	#endif	621	#endif
547	#if EV_USE_SELECT	622	#if EV_USE_SELECT
548	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	623	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
549	#endif	624	#endif
		625	}
		626	}
550		627
		628	void
		629	loop_destroy (EV_P)
		630	{
		631	#if EV_USE_KQUEUE
		632	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		633	#endif
		634	#if EV_USE_EPOLL
		635	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		636	#endif
		637	#if EV_USE_POLL
		638	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		639	#endif
		640	#if EV_USE_SELECT
		641	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		642	#endif
		643
		644	method = 0;
		645	/TODO/
		646	}
		647
		648	void
		649	loop_fork (EV_P)
		650	{
		651	/TODO/
		652	#if EV_USE_EPOLL
		653	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		654	#endif
		655	#if EV_USE_KQUEUE
		656	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		657	#endif
		658	}
		659
		660	#if EV_MULTIPLICITY
		661	struct ev_loop *
		662	ev_loop_new (int methods)
		663	{
		664	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		665
		666	loop_init (EV_A_ methods);
		667
		668	if (ev_method (EV_A))
		669	return loop;
		670
		671	return 0;
		672	}
		673
		674	void
		675	ev_loop_destroy (EV_P)
		676	{
		677	loop_destroy (EV_A);
		678	free (loop);
		679	}
		680
		681	void
		682	ev_loop_fork (EV_P)
		683	{
		684	loop_fork (EV_A);
		685	}
		686
		687	#endif
		688
		689	#if EV_MULTIPLICITY
		690	struct ev_loop default_loop_struct;
		691	static struct ev_loop *default_loop;
		692
		693	struct ev_loop *
		694	#else
		695	static int default_loop;
		696
		697	int
		698	#endif
		699	ev_default_loop (int methods)
		700	{
		701	if (sigpipe [0] == sigpipe [1])
		702	if (pipe (sigpipe))
		703	return 0;
		704
		705	if (!default_loop)
		706	{
		707	#if EV_MULTIPLICITY
		708	struct ev_loop *loop = default_loop = &default_loop_struct;
		709	#else
		710	default_loop = 1;
		711	#endif
		712
		713	loop_init (EV_A_ methods);
		714
551	if (ev_method)	715	if (ev_method (EV_A))
552	{	716	{
553	ev_watcher_init (&sigev, sigcb);	717	ev_watcher_init (&sigev, sigcb);
		718	ev_set_priority (&sigev, EV_MAXPRI);
554	siginit ();	719	siginit (EV_A);
555		720
		721	#ifndef WIN32
556	ev_signal_init (&childev, childcb, SIGCHLD);	722	ev_signal_init (&childev, childcb, SIGCHLD);
		723	ev_set_priority (&childev, EV_MAXPRI);
557	ev_signal_start (&childev);	724	ev_signal_start (EV_A_ &childev);
		725	ev_unref (EV_A); /* child watcher should not keep loop alive */
		726	#endif
558	}	727	}
		728	else
		729	default_loop = 0;
559	}	730	}
560		731
561	return ev_method;	732	return default_loop;
562	}	733	}
563		734
564	/*****************************************************************************/
565
566	void	735	void
567	ev_fork_prepare (void)	736	ev_default_destroy (void)
568	{	737	{
569	/* nop */	738	#if EV_MULTIPLICITY
570	}	739	struct ev_loop *loop = default_loop;
571
572	void
573	ev_fork_parent (void)
574	{
575	/* nop */
576	}
577
578	void
579	ev_fork_child (void)
580	{
581	#if EV_USE_EPOLL
582	if (ev_method == EVMETHOD_EPOLL)
583	epoll_postfork_child ();
584	#endif	740	#endif
585		741
		742	ev_ref (EV_A); /* child watcher */
		743	ev_signal_stop (EV_A_ &childev);
		744
		745	ev_ref (EV_A); /* signal watcher */
586	ev_io_stop (&sigev);	746	ev_io_stop (EV_A_ &sigev);
		747
		748	close (sigpipe [0]); sigpipe [0] = 0;
		749	close (sigpipe [1]); sigpipe [1] = 0;
		750
		751	loop_destroy (EV_A);
		752	}
		753
		754	void
		755	ev_default_fork (void)
		756	{
		757	#if EV_MULTIPLICITY
		758	struct ev_loop *loop = default_loop;
		759	#endif
		760
		761	loop_fork (EV_A);
		762
		763	ev_io_stop (EV_A_ &sigev);
587	close (sigpipe [0]);	764	close (sigpipe [0]);
588	close (sigpipe [1]);	765	close (sigpipe [1]);
589	pipe (sigpipe);	766	pipe (sigpipe);
		767
		768	ev_ref (EV_A); /* signal watcher */
590	siginit ();	769	siginit (EV_A);
591	}	770	}
592		771
593	/*****************************************************************************/	772	/*****************************************************************************/
594		773
595	static void	774	static void
596	call_pending (void)	775	call_pending (EV_P)
597	{	776	{
		777	int pri;
		778
		779	for (pri = NUMPRI; pri--; )
598	while (pendingcnt)	780	while (pendingcnt [pri])
599	{	781	{
600	ANPENDING *p = pendings + --pendingcnt;	782	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
601		783
602	if (p->w)	784	if (p->w)
603	{	785	{
604	p->w->pending = 0;	786	p->w->pending = 0;
605	p->w->cb (p->w, p->events);	787	p->w->cb (EV_A_ p->w, p->events);
606	}	788	}
607	}	789	}
608	}	790	}
609		791
610	static void	792	static void
611	timers_reify (void)	793	timers_reify (EV_P)
612	{	794	{
613	while (timercnt && timers [0]->at <= now)	795	while (timercnt && timers [0]->at <= mn_now)
614	{	796	{
615	struct ev_timer *w = timers [0];	797	struct ev_timer *w = timers [0];
		798
		799	assert (("inactive timer on timer heap detected", ev_is_active (w)));
616		800
617	/* first reschedule or stop timer */	801	/* first reschedule or stop timer */
618	if (w->repeat)	802	if (w->repeat)
619	{	803	{
620	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	804	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
621	w->at = now + w->repeat;	805	w->at = mn_now + w->repeat;
622	downheap ((WT *)timers, timercnt, 0);	806	downheap ((WT *)timers, timercnt, 0);
623	}	807	}
624	else	808	else
625	ev_timer_stop (w); /* nonrepeating: stop timer */	809	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
626		810
627	event ((W)w, EV_TIMEOUT);	811	event (EV_A_ (W)w, EV_TIMEOUT);
628	}	812	}
629	}	813	}
630		814
631	static void	815	static void
632	periodics_reify (void)	816	periodics_reify (EV_P)
633	{	817	{
634	while (periodiccnt && periodics [0]->at <= ev_now)	818	while (periodiccnt && periodics [0]->at <= rt_now)
635	{	819	{
636	struct ev_periodic *w = periodics [0];	820	struct ev_periodic *w = periodics [0];
		821
		822	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
637		823
638	/* first reschedule or stop timer */	824	/* first reschedule or stop timer */
639	if (w->interval)	825	if (w->interval)
640	{	826	{
641	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	827	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));	828	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
643	downheap ((WT *)periodics, periodiccnt, 0);	829	downheap ((WT *)periodics, periodiccnt, 0);
644	}	830	}
645	else	831	else
646	ev_periodic_stop (w); /* nonrepeating: stop timer */	832	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
647		833
648	event ((W)w, EV_PERIODIC);	834	event (EV_A_ (W)w, EV_PERIODIC);
649	}	835	}
650	}	836	}
651		837
652	static void	838	static void
653	periodics_reschedule (ev_tstamp diff)	839	periodics_reschedule (EV_P)
654	{	840	{
655	int i;	841	int i;
656		842
657	/* adjust periodics after time jump */	843	/* adjust periodics after time jump */
658	for (i = 0; i < periodiccnt; ++i)	844	for (i = 0; i < periodiccnt; ++i)
659	{	845	{
660	struct ev_periodic *w = periodics [i];	846	struct ev_periodic *w = periodics [i];
661		847
662	if (w->interval)	848	if (w->interval)
663	{	849	{
664	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	850	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
665		851
666	if (fabs (diff) >= 1e-4)	852	if (fabs (diff) >= 1e-4)
667	{	853	{
668	ev_periodic_stop (w);	854	ev_periodic_stop (EV_A_ w);
669	ev_periodic_start (w);	855	ev_periodic_start (EV_A_ w);
670		856
671	i = 0; /* restart loop, inefficient, but time jumps should be rare */	857	i = 0; /* restart loop, inefficient, but time jumps should be rare */
672	}	858	}
673	}	859	}
674	}	860	}
675	}	861	}
676		862
677	static int	863	inline int
678	time_update_monotonic (void)	864	time_update_monotonic (EV_P)
679	{	865	{
680	now = get_clock ();	866	mn_now = get_clock ();
681		867
682	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	868	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
683	{	869	{
684	ev_now = now + diff;	870	rt_now = rtmn_diff + mn_now;
685	return 0;	871	return 0;
686	}	872	}
687	else	873	else
688	{	874	{
689	now_floor = now;	875	now_floor = mn_now;
690	ev_now = ev_time ();	876	rt_now = ev_time ();
691	return 1;	877	return 1;
692	}	878	}
693	}	879	}
694		880
695	static void	881	static void
696	time_update (void)	882	time_update (EV_P)
697	{	883	{
698	int i;	884	int i;
699		885
700	#if EV_USE_MONOTONIC	886	#if EV_USE_MONOTONIC
701	if (expect_true (have_monotonic))	887	if (expect_true (have_monotonic))
702	{	888	{
703	if (time_update_monotonic ())	889	if (time_update_monotonic (EV_A))
704	{	890	{
705	ev_tstamp odiff = diff;	891	ev_tstamp odiff = rtmn_diff;
706		892
707	for (i = 4; --i; ) /* loop a few times, before making important decisions */	893	for (i = 4; --i; ) /* loop a few times, before making important decisions */
708	{	894	{
709	diff = ev_now - now;	895	rtmn_diff = rt_now - mn_now;
710		896
711	if (fabs (odiff - diff) < MIN_TIMEJUMP)	897	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
712	return; /* all is well */	898	return; /* all is well */
713		899
714	ev_now = ev_time ();	900	rt_now = ev_time ();
715	now = get_clock ();	901	mn_now = get_clock ();
716	now_floor = now;	902	now_floor = mn_now;
717	}	903	}
718		904
719	periodics_reschedule (diff - odiff);	905	periodics_reschedule (EV_A);
720	/* no timer adjustment, as the monotonic clock doesn't jump */	906	/* no timer adjustment, as the monotonic clock doesn't jump */
		907	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
721	}	908	}
722	}	909	}
723	else	910	else
724	#endif	911	#endif
725	{	912	{
726	ev_now = ev_time ();	913	rt_now = ev_time ();
727		914
728	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	915	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
729	{	916	{
730	periodics_reschedule (ev_now - now);	917	periodics_reschedule (EV_A);
731		918
732	/* adjust timers. this is easy, as the offset is the same for all */	919	/* adjust timers. this is easy, as the offset is the same for all */
733	for (i = 0; i < timercnt; ++i)	920	for (i = 0; i < timercnt; ++i)
734	timers [i]->at += diff;	921	timers [i]->at += rt_now - mn_now;
735	}	922	}
736		923
737	now = ev_now;	924	mn_now = rt_now;
738	}	925	}
739	}	926	}
740		927
741	int ev_loop_done;	928	void
		929	ev_ref (EV_P)
		930	{
		931	++activecnt;
		932	}
742		933
		934	void
		935	ev_unref (EV_P)
		936	{
		937	--activecnt;
		938	}
		939
		940	static int loop_done;
		941
		942	void
743	void ev_loop (int flags)	943	ev_loop (EV_P_ int flags)
744	{	944	{
745	double block;	945	double block;
746	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	946	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
747		947
748	do	948	do
749	{	949	{
750	/* queue check watchers (and execute them) */	950	/* queue check watchers (and execute them) */
751	if (expect_false (preparecnt))	951	if (expect_false (preparecnt))
752	{	952	{
753	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	953	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
754	call_pending ();	954	call_pending (EV_A);
755	}	955	}
756		956
757	/* update fd-related kernel structures */	957	/* update fd-related kernel structures */
758	fd_reify ();	958	fd_reify (EV_A);
759		959
760	/* calculate blocking time */	960	/* calculate blocking time */
761		961
762	/* we only need this for !monotonic clockor timers, but as we basically	962	/* we only need this for !monotonic clockor timers, but as we basically
763	always have timers, we just calculate it always */	963	always have timers, we just calculate it always */
764	#if EV_USE_MONOTONIC	964	#if EV_USE_MONOTONIC
765	if (expect_true (have_monotonic))	965	if (expect_true (have_monotonic))
766	time_update_monotonic ();	966	time_update_monotonic (EV_A);
767	else	967	else
768	#endif	968	#endif
769	{	969	{
770	ev_now = ev_time ();	970	rt_now = ev_time ();
771	now = ev_now;	971	mn_now = rt_now;
772	}	972	}
773		973
774	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	974	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
775	block = 0.;	975	block = 0.;
776	else	976	else
777	{	977	{
778	block = MAX_BLOCKTIME;	978	block = MAX_BLOCKTIME;
779		979
780	if (timercnt)	980	if (timercnt)
781	{	981	{
782	ev_tstamp to = timers [0]->at - now + method_fudge;	982	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
783	if (block > to) block = to;	983	if (block > to) block = to;
784	}	984	}
785		985
786	if (periodiccnt)	986	if (periodiccnt)
787	{	987	{
788	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	988	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
789	if (block > to) block = to;	989	if (block > to) block = to;
790	}	990	}
791		991
792	if (block < 0.) block = 0.;	992	if (block < 0.) block = 0.;
793	}	993	}
794		994
795	method_poll (block);	995	method_poll (EV_A_ block);
796		996
797	/* update ev_now, do magic */	997	/* update rt_now, do magic */
798	time_update ();	998	time_update (EV_A);
799		999
800	/* queue pending timers and reschedule them */	1000	/* queue pending timers and reschedule them */
801	timers_reify (); /* relative timers called last */	1001	timers_reify (EV_A); /* relative timers called last */
802	periodics_reify (); /* absolute timers called first */	1002	periodics_reify (EV_A); /* absolute timers called first */
803		1003
804	/* queue idle watchers unless io or timers are pending */	1004	/* queue idle watchers unless io or timers are pending */
805	if (!pendingcnt)	1005	if (!pendingcnt)
806	queue_events ((W *)idles, idlecnt, EV_IDLE);	1006	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
807		1007
808	/* queue check watchers, to be executed first */	1008	/* queue check watchers, to be executed first */
809	if (checkcnt)	1009	if (checkcnt)
810	queue_events ((W *)checks, checkcnt, EV_CHECK);	1010	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
811		1011
812	call_pending ();	1012	call_pending (EV_A);
813	}	1013	}
814	while (!ev_loop_done);	1014	while (activecnt && !loop_done);
815		1015
816	if (ev_loop_done != 2)	1016	if (loop_done != 2)
817	ev_loop_done = 0;	1017	loop_done = 0;
		1018	}
		1019
		1020	void
		1021	ev_unloop (EV_P_ int how)
		1022	{
		1023	loop_done = how;
818	}	1024	}
819		1025
820	/*****************************************************************************/	1026	/*****************************************************************************/
821		1027
822	static void	1028	inline void
823	wlist_add (WL *head, WL elem)	1029	wlist_add (WL *head, WL elem)
824	{	1030	{
825	elem->next = *head;	1031	elem->next = *head;
826	*head = elem;	1032	*head = elem;
827	}	1033	}
828		1034
829	static void	1035	inline void
830	wlist_del (WL *head, WL elem)	1036	wlist_del (WL *head, WL elem)
831	{	1037	{
832	while (*head)	1038	while (*head)
833	{	1039	{
834	if (*head == elem)	1040	if (*head == elem)
…		…
839		1045
840	head = &(*head)->next;	1046	head = &(*head)->next;
841	}	1047	}
842	}	1048	}
843		1049
844	static void	1050	inline void
845	ev_clear_pending (W w)	1051	ev_clear_pending (EV_P_ W w)
846	{	1052	{
847	if (w->pending)	1053	if (w->pending)
848	{	1054	{
849	pendings [w->pending - 1].w = 0;	1055	pendings [ABSPRI (w)][w->pending - 1].w = 0;
850	w->pending = 0;	1056	w->pending = 0;
851	}	1057	}
852	}	1058	}
853		1059
854	static void	1060	inline void
855	ev_start (W w, int active)	1061	ev_start (EV_P_ W w, int active)
856	{	1062	{
		1063	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1064	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1065
857	w->active = active;	1066	w->active = active;
		1067	ev_ref (EV_A);
858	}	1068	}
859		1069
860	static void	1070	inline void
861	ev_stop (W w)	1071	ev_stop (EV_P_ W w)
862	{	1072	{
		1073	ev_unref (EV_A);
863	w->active = 0;	1074	w->active = 0;
864	}	1075	}
865		1076
866	/*****************************************************************************/	1077	/*****************************************************************************/
867		1078
868	void	1079	void
869	ev_io_start (struct ev_io *w)	1080	ev_io_start (EV_P_ struct ev_io *w)
870	{	1081	{
871	int fd = w->fd;	1082	int fd = w->fd;
872		1083
873	if (ev_is_active (w))	1084	if (ev_is_active (w))
874	return;	1085	return;
875		1086
876	assert (("ev_io_start called with negative fd", fd >= 0));	1087	assert (("ev_io_start called with negative fd", fd >= 0));
877		1088
878	ev_start ((W)w, 1);	1089	ev_start (EV_A_ (W)w, 1);
879	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1090	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
880	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1091	wlist_add ((WL *)&anfds[fd].head, (WL)w);
881		1092
882	fd_change (fd);	1093	fd_change (EV_A_ fd);
883	}	1094	}
884		1095
885	void	1096	void
886	ev_io_stop (struct ev_io *w)	1097	ev_io_stop (EV_P_ struct ev_io *w)
887	{	1098	{
888	ev_clear_pending ((W)w);	1099	ev_clear_pending (EV_A_ (W)w);
889	if (!ev_is_active (w))	1100	if (!ev_is_active (w))
890	return;	1101	return;
891		1102
892	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1103	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
893	ev_stop ((W)w);	1104	ev_stop (EV_A_ (W)w);
894		1105
895	fd_change (w->fd);	1106	fd_change (EV_A_ w->fd);
896	}	1107	}
897		1108
898	void	1109	void
899	ev_timer_start (struct ev_timer *w)	1110	ev_timer_start (EV_P_ struct ev_timer *w)
900	{	1111	{
901	if (ev_is_active (w))	1112	if (ev_is_active (w))
902	return;	1113	return;
903		1114
904	w->at += now;	1115	w->at += mn_now;
905		1116
906	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1117	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
907		1118
908	ev_start ((W)w, ++timercnt);	1119	ev_start (EV_A_ (W)w, ++timercnt);
909	array_needsize (timers, timermax, timercnt, );	1120	array_needsize (timers, timermax, timercnt, );
910	timers [timercnt - 1] = w;	1121	timers [timercnt - 1] = w;
911	upheap ((WT *)timers, timercnt - 1);	1122	upheap ((WT *)timers, timercnt - 1);
912	}	1123	}
913		1124
914	void	1125	void
915	ev_timer_stop (struct ev_timer *w)	1126	ev_timer_stop (EV_P_ struct ev_timer *w)
916	{	1127	{
917	ev_clear_pending ((W)w);	1128	ev_clear_pending (EV_A_ (W)w);
918	if (!ev_is_active (w))	1129	if (!ev_is_active (w))
919	return;	1130	return;
920		1131
921	if (w->active < timercnt--)	1132	if (w->active < timercnt--)
922	{	1133	{
…		…
924	downheap ((WT *)timers, timercnt, w->active - 1);	1135	downheap ((WT *)timers, timercnt, w->active - 1);
925	}	1136	}
926		1137
927	w->at = w->repeat;	1138	w->at = w->repeat;
928		1139
929	ev_stop ((W)w);	1140	ev_stop (EV_A_ (W)w);
930	}	1141	}
931		1142
932	void	1143	void
933	ev_timer_again (struct ev_timer *w)	1144	ev_timer_again (EV_P_ struct ev_timer *w)
934	{	1145	{
935	if (ev_is_active (w))	1146	if (ev_is_active (w))
936	{	1147	{
937	if (w->repeat)	1148	if (w->repeat)
938	{	1149	{
939	w->at = now + w->repeat;	1150	w->at = mn_now + w->repeat;
940	downheap ((WT *)timers, timercnt, w->active - 1);	1151	downheap ((WT *)timers, timercnt, w->active - 1);
941	}	1152	}
942	else	1153	else
943	ev_timer_stop (w);	1154	ev_timer_stop (EV_A_ w);
944	}	1155	}
945	else if (w->repeat)	1156	else if (w->repeat)
946	ev_timer_start (w);	1157	ev_timer_start (EV_A_ w);
947	}	1158	}
948		1159
949	void	1160	void
950	ev_periodic_start (struct ev_periodic *w)	1161	ev_periodic_start (EV_P_ struct ev_periodic *w)
951	{	1162	{
952	if (ev_is_active (w))	1163	if (ev_is_active (w))
953	return;	1164	return;
954		1165
955	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1166	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
956		1167
957	/* this formula differs from the one in periodic_reify because we do not always round up */	1168	/* this formula differs from the one in periodic_reify because we do not always round up */
958	if (w->interval)	1169	if (w->interval)
959	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1170	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
960		1171
961	ev_start ((W)w, ++periodiccnt);	1172	ev_start (EV_A_ (W)w, ++periodiccnt);
962	array_needsize (periodics, periodicmax, periodiccnt, );	1173	array_needsize (periodics, periodicmax, periodiccnt, );
963	periodics [periodiccnt - 1] = w;	1174	periodics [periodiccnt - 1] = w;
964	upheap ((WT *)periodics, periodiccnt - 1);	1175	upheap ((WT *)periodics, periodiccnt - 1);
965	}	1176	}
966		1177
967	void	1178	void
968	ev_periodic_stop (struct ev_periodic *w)	1179	ev_periodic_stop (EV_P_ struct ev_periodic *w)
969	{	1180	{
970	ev_clear_pending ((W)w);	1181	ev_clear_pending (EV_A_ (W)w);
971	if (!ev_is_active (w))	1182	if (!ev_is_active (w))
972	return;	1183	return;
973		1184
974	if (w->active < periodiccnt--)	1185	if (w->active < periodiccnt--)
975	{	1186	{
976	periodics [w->active - 1] = periodics [periodiccnt];	1187	periodics [w->active - 1] = periodics [periodiccnt];
977	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1188	downheap ((WT *)periodics, periodiccnt, w->active - 1);
978	}	1189	}
979		1190
980	ev_stop ((W)w);	1191	ev_stop (EV_A_ (W)w);
981	}	1192	}
982		1193
983	void	1194	void
984	ev_signal_start (struct ev_signal *w)	1195	ev_idle_start (EV_P_ struct ev_idle *w)
985	{	1196	{
986	if (ev_is_active (w))	1197	if (ev_is_active (w))
987	return;	1198	return;
988		1199
		1200	ev_start (EV_A_ (W)w, ++idlecnt);
		1201	array_needsize (idles, idlemax, idlecnt, );
		1202	idles [idlecnt - 1] = w;
		1203	}
		1204
		1205	void
		1206	ev_idle_stop (EV_P_ struct ev_idle *w)
		1207	{
		1208	ev_clear_pending (EV_A_ (W)w);
		1209	if (ev_is_active (w))
		1210	return;
		1211
		1212	idles [w->active - 1] = idles [--idlecnt];
		1213	ev_stop (EV_A_ (W)w);
		1214	}
		1215
		1216	void
		1217	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1218	{
		1219	if (ev_is_active (w))
		1220	return;
		1221
		1222	ev_start (EV_A_ (W)w, ++preparecnt);
		1223	array_needsize (prepares, preparemax, preparecnt, );
		1224	prepares [preparecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	prepares [w->active - 1] = prepares [--preparecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_check_start (EV_P_ struct ev_check *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++checkcnt);
		1245	array_needsize (checks, checkmax, checkcnt, );
		1246	checks [checkcnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_check_stop (EV_P_ struct ev_check *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	checks [w->active - 1] = checks [--checkcnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	#ifndef SA_RESTART
		1261	# define SA_RESTART 0
		1262	#endif
		1263
		1264	void
		1265	ev_signal_start (EV_P_ struct ev_signal *w)
		1266	{
		1267	#if EV_MULTIPLICITY
		1268	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1269	#endif
		1270	if (ev_is_active (w))
		1271	return;
		1272
989	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1273	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
990		1274
991	ev_start ((W)w, 1);	1275	ev_start (EV_A_ (W)w, 1);
992	array_needsize (signals, signalmax, w->signum, signals_init);	1276	array_needsize (signals, signalmax, w->signum, signals_init);
993	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1277	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
994		1278
995	if (!w->next)	1279	if (!w->next)
996	{	1280	{
997	struct sigaction sa;	1281	struct sigaction sa;
998	sa.sa_handler = sighandler;	1282	sa.sa_handler = sighandler;
999	sigfillset (&sa.sa_mask);	1283	sigfillset (&sa.sa_mask);
1000	sa.sa_flags = 0;	1284	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1001	sigaction (w->signum, &sa, 0);	1285	sigaction (w->signum, &sa, 0);
1002	}	1286	}
1003	}	1287	}
1004		1288
1005	void	1289	void
1006	ev_signal_stop (struct ev_signal *w)	1290	ev_signal_stop (EV_P_ struct ev_signal *w)
1007	{	1291	{
1008	ev_clear_pending ((W)w);	1292	ev_clear_pending (EV_A_ (W)w);
1009	if (!ev_is_active (w))	1293	if (!ev_is_active (w))
1010	return;	1294	return;
1011		1295
1012	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1296	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1013	ev_stop ((W)w);	1297	ev_stop (EV_A_ (W)w);
1014		1298
1015	if (!signals [w->signum - 1].head)	1299	if (!signals [w->signum - 1].head)
1016	signal (w->signum, SIG_DFL);	1300	signal (w->signum, SIG_DFL);
1017	}	1301	}
1018		1302
1019	void	1303	void
1020	ev_idle_start (struct ev_idle *w)	1304	ev_child_start (EV_P_ struct ev_child *w)
1021	{	1305	{
		1306	#if EV_MULTIPLICITY
		1307	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1308	#endif
1022	if (ev_is_active (w))	1309	if (ev_is_active (w))
1023	return;	1310	return;
1024		1311
1025	ev_start ((W)w, ++idlecnt);	1312	ev_start (EV_A_ (W)w, 1);
1026	array_needsize (idles, idlemax, idlecnt, );	1313	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1027	idles [idlecnt - 1] = w;
1028	}	1314	}
1029		1315
1030	void	1316	void
1031	ev_idle_stop (struct ev_idle *w)	1317	ev_child_stop (EV_P_ struct ev_child *w)
1032	{	1318	{
1033	ev_clear_pending ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
1034	if (ev_is_active (w))	1320	if (ev_is_active (w))
1035	return;	1321	return;
1036		1322
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);	1323	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1103	ev_stop ((W)w);	1324	ev_stop (EV_A_ (W)w);
1104	}	1325	}
1105		1326
1106	/*****************************************************************************/	1327	/*****************************************************************************/
1107		1328
1108	struct ev_once	1329	struct ev_once
…		…
1112	void (cb)(int revents, void arg);	1333	void (cb)(int revents, void arg);
1113	void *arg;	1334	void *arg;
1114	};	1335	};
1115		1336
1116	static void	1337	static void
1117	once_cb (struct ev_once *once, int revents)	1338	once_cb (EV_P_ struct ev_once *once, int revents)
1118	{	1339	{
1119	void (cb)(int revents, void arg) = once->cb;	1340	void (cb)(int revents, void arg) = once->cb;
1120	void *arg = once->arg;	1341	void *arg = once->arg;
1121		1342
1122	ev_io_stop (&once->io);	1343	ev_io_stop (EV_A_ &once->io);
1123	ev_timer_stop (&once->to);	1344	ev_timer_stop (EV_A_ &once->to);
1124	free (once);	1345	free (once);
1125		1346
1126	cb (revents, arg);	1347	cb (revents, arg);
1127	}	1348	}
1128		1349
1129	static void	1350	static void
1130	once_cb_io (struct ev_io *w, int revents)	1351	once_cb_io (EV_P_ struct ev_io *w, int revents)
1131	{	1352	{
1132	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1353	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1133	}	1354	}
1134		1355
1135	static void	1356	static void
1136	once_cb_to (struct ev_timer *w, int revents)	1357	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1137	{	1358	{
1138	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1359	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1139	}	1360	}
1140		1361
1141	void	1362	void
1142	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1363	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1143	{	1364	{
1144	struct ev_once *once = malloc (sizeof (struct ev_once));	1365	struct ev_once *once = malloc (sizeof (struct ev_once));
1145		1366
1146	if (!once)	1367	if (!once)
1147	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1368	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1152		1373
1153	ev_watcher_init (&once->io, once_cb_io);	1374	ev_watcher_init (&once->io, once_cb_io);
1154	if (fd >= 0)	1375	if (fd >= 0)
1155	{	1376	{
1156	ev_io_set (&once->io, fd, events);	1377	ev_io_set (&once->io, fd, events);
1157	ev_io_start (&once->io);	1378	ev_io_start (EV_A_ &once->io);
1158	}	1379	}
1159		1380
1160	ev_watcher_init (&once->to, once_cb_to);	1381	ev_watcher_init (&once->to, once_cb_to);
1161	if (timeout >= 0.)	1382	if (timeout >= 0.)
1162	{	1383	{
1163	ev_timer_set (&once->to, timeout, 0.);	1384	ev_timer_set (&once->to, timeout, 0.);
1164	ev_timer_start (&once->to);	1385	ev_timer_start (EV_A_ &once->to);
1165	}	1386	}
1166	}	1387	}
1167	}	1388	}
1168		1389
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
1251

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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 1.61 by root, Sun Nov 4 19:45:09 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.41 by root, Fri Nov 2 16:54:34 2007 UTC vs.
Revision 1.61 by root, Sun Nov 4 19:45:09 2007 UTC