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

Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.62 by root, Sun Nov 4 20:38:07 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
…		…
56		80
57	#ifndef EV_USE_SELECT	81	#ifndef EV_USE_SELECT
58	# define EV_USE_SELECT 1	82	# define EV_USE_SELECT 1
59	#endif	83	#endif
60		84
		85	#ifndef EV_USE_POLL
		86	# define EV_USE_POLL 0 /* poll is usually slower than select, and not as well tested */
		87	#endif
		88
61	#ifndef EV_USE_EPOLL	89	#ifndef EV_USE_EPOLL
62	# 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
		95	#endif
		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
63	#endif	103	#endif
64		104
65	#ifndef EV_USE_REALTIME	105	#ifndef EV_USE_REALTIME
66	# define EV_USE_REALTIME 1	106	# define EV_USE_REALTIME 1
67	#endif	107	#endif
…		…
96	#endif	136	#endif
97		137
98	#define expect_false(expr) expect ((expr) != 0, 0)	138	#define expect_false(expr) expect ((expr) != 0, 0)
99	#define expect_true(expr) expect ((expr) != 0, 1)	139	#define expect_true(expr) expect ((expr) != 0, 1)
100		140
		141	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
		142	#define ABSPRI(w) ((w)->priority - EV_MINPRI)
		143
101	typedef struct ev_watcher *W;	144	typedef struct ev_watcher *W;
102	typedef struct ev_watcher_list *WL;	145	typedef struct ev_watcher_list *WL;
103	typedef struct ev_watcher_time *WT;	146	typedef struct ev_watcher_time *WT;
104		147
105	static ev_tstamp now_floor, now, diff; /* monotonic clock */	148	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
106	ev_tstamp ev_now;
107	int ev_method;
108
109	static int have_monotonic; /* runtime */
110
111	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
112	static void (*method_modify)(int fd, int oev, int nev);
113	static void (*method_poll)(ev_tstamp timeout);
114		149
115	/*****************************************************************************/	150	/*****************************************************************************/
116		151
117	ev_tstamp	152	typedef struct
		153	{
		154	struct ev_watcher_list *head;
		155	unsigned char events;
		156	unsigned char reify;
		157	} ANFD;
		158
		159	typedef struct
		160	{
		161	W w;
		162	int events;
		163	} ANPENDING;
		164
		165	#if EV_MULTIPLICITY
		166
		167	struct ev_loop
		168	{
		169	# define VAR(name,decl) decl;
		170	# include "ev_vars.h"
		171	};
		172	# undef VAR
		173	# include "ev_wrap.h"
		174
		175	#else
		176
		177	# define VAR(name,decl) static decl;
		178	# include "ev_vars.h"
		179	# undef VAR
		180
		181	#endif
		182
		183	/*****************************************************************************/
		184
		185	inline ev_tstamp
118	ev_time (void)	186	ev_time (void)
119	{	187	{
120	#if EV_USE_REALTIME	188	#if EV_USE_REALTIME
121	struct timespec ts;	189	struct timespec ts;
122	clock_gettime (CLOCK_REALTIME, &ts);	190	clock_gettime (CLOCK_REALTIME, &ts);
…		…
126	gettimeofday (&tv, 0);	194	gettimeofday (&tv, 0);
127	return tv.tv_sec + tv.tv_usec * 1e-6;	195	return tv.tv_sec + tv.tv_usec * 1e-6;
128	#endif	196	#endif
129	}	197	}
130		198
131	static ev_tstamp	199	inline ev_tstamp
132	get_clock (void)	200	get_clock (void)
133	{	201	{
134	#if EV_USE_MONOTONIC	202	#if EV_USE_MONOTONIC
135	if (expect_true (have_monotonic))	203	if (expect_true (have_monotonic))
136	{	204	{
…		…
139	return ts.tv_sec + ts.tv_nsec * 1e-9;	207	return ts.tv_sec + ts.tv_nsec * 1e-9;
140	}	208	}
141	#endif	209	#endif
142		210
143	return ev_time ();	211	return ev_time ();
		212	}
		213
		214	ev_tstamp
		215	ev_now (EV_P)
		216	{
		217	return rt_now;
144	}	218	}
145		219
146	#define array_roundsize(base,n) ((n) \| 4 & ~3)	220	#define array_roundsize(base,n) ((n) \| 4 & ~3)
147		221
148	#define array_needsize(base,cur,cnt,init) \	222	#define array_needsize(base,cur,cnt,init) \
…		…
160	cur = newcnt; \	234	cur = newcnt; \
161	}	235	}
162		236
163	/*****************************************************************************/	237	/*****************************************************************************/
164		238
165	typedef struct
166	{
167	struct ev_io *head;
168	unsigned char events;
169	unsigned char reify;
170	} ANFD;
171
172	static ANFD *anfds;
173	static int anfdmax;
174
175	static void	239	static void
176	anfds_init (ANFD *base, int count)	240	anfds_init (ANFD *base, int count)
177	{	241	{
178	while (count--)	242	while (count--)
179	{	243	{
…		…
183		247
184	++base;	248	++base;
185	}	249	}
186	}	250	}
187		251
188	typedef struct
189	{
190	W w;
191	int events;
192	} ANPENDING;
193
194	static ANPENDING *pendings;
195	static int pendingmax, pendingcnt;
196
197	static void	252	static void
198	event (W w, int events)	253	event (EV_P_ W w, int events)
199	{	254	{
200	if (w->pending)	255	if (w->pending)
201	{	256	{
202	pendings [w->pending - 1].events \|= events;	257	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
203	return;	258	return;
204	}	259	}
205		260
206	w->pending = ++pendingcnt;	261	w->pending = ++pendingcnt [ABSPRI (w)];
207	array_needsize (pendings, pendingmax, pendingcnt, );	262	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );
208	pendings [pendingcnt - 1].w = w;	263	pendings [ABSPRI (w)][w->pending - 1].w = w;
209	pendings [pendingcnt - 1].events = events;	264	pendings [ABSPRI (w)][w->pending - 1].events = events;
210	}	265	}
211		266
212	static void	267	static void
213	queue_events (W *events, int eventcnt, int type)	268	queue_events (EV_P_ W *events, int eventcnt, int type)
214	{	269	{
215	int i;	270	int i;
216		271
217	for (i = 0; i < eventcnt; ++i)	272	for (i = 0; i < eventcnt; ++i)
218	event (events [i], type);	273	event (EV_A_ events [i], type);
219	}	274	}
220		275
221	static void	276	static void
222	fd_event (int fd, int events)	277	fd_event (EV_P_ int fd, int events)
223	{	278	{
224	ANFD *anfd = anfds + fd;	279	ANFD *anfd = anfds + fd;
225	struct ev_io *w;	280	struct ev_io *w;
226		281
227	for (w = anfd->head; w; w = w->next)	282	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
228	{	283	{
229	int ev = w->events & events;	284	int ev = w->events & events;
230		285
231	if (ev)	286	if (ev)
232	event ((W)w, ev);	287	event (EV_A_ (W)w, ev);
233	}	288	}
234	}	289	}
235		290
236	/*****************************************************************************/	291	/*****************************************************************************/
237		292
238	static int *fdchanges;
239	static int fdchangemax, fdchangecnt;
240
241	static void	293	static void
242	fd_reify (void)	294	fd_reify (EV_P)
243	{	295	{
244	int i;	296	int i;
245		297
246	for (i = 0; i < fdchangecnt; ++i)	298	for (i = 0; i < fdchangecnt; ++i)
247	{	299	{
…		…
249	ANFD *anfd = anfds + fd;	301	ANFD *anfd = anfds + fd;
250	struct ev_io *w;	302	struct ev_io *w;
251		303
252	int events = 0;	304	int events = 0;
253		305
254	for (w = anfd->head; w; w = w->next)	306	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
255	events \|= w->events;	307	events \|= w->events;
256		308
257	anfd->reify = 0;	309	anfd->reify = 0;
258		310
259	if (anfd->events != events)	311	if (anfd->events != events)
260	{	312	{
261	method_modify (fd, anfd->events, events);	313	method_modify (EV_A_ fd, anfd->events, events);
262	anfd->events = events;	314	anfd->events = events;
263	}	315	}
264	}	316	}
265		317
266	fdchangecnt = 0;	318	fdchangecnt = 0;
267	}	319	}
268		320
269	static void	321	static void
270	fd_change (int fd)	322	fd_change (EV_P_ int fd)
271	{	323	{
272	if (anfds [fd].reify \|\| fdchangecnt < 0)	324	if (anfds [fd].reify \|\| fdchangecnt < 0)
273	return;	325	return;
274		326
275	anfds [fd].reify = 1;	327	anfds [fd].reify = 1;
…		…
277	++fdchangecnt;	329	++fdchangecnt;
278	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	330	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
279	fdchanges [fdchangecnt - 1] = fd;	331	fdchanges [fdchangecnt - 1] = fd;
280	}	332	}
281		333
		334	static void
		335	fd_kill (EV_P_ int fd)
		336	{
		337	struct ev_io *w;
		338
		339	while ((w = (struct ev_io *)anfds [fd].head))
		340	{
		341	ev_io_stop (EV_A_ w);
		342	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
		343	}
		344	}
		345
282	/* called on EBADF to verify fds */	346	/* called on EBADF to verify fds */
283	static void	347	static void
284	fd_recheck (void)	348	fd_ebadf (EV_P)
285	{	349	{
286	int fd;	350	int fd;
287		351
288	for (fd = 0; fd < anfdmax; ++fd)	352	for (fd = 0; fd < anfdmax; ++fd)
289	if (anfds [fd].events)	353	if (anfds [fd].events)
290	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	354	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
291	while (anfds [fd].head)	355	fd_kill (EV_A_ fd);
		356	}
		357
		358	/* called on ENOMEM in select/poll to kill some fds and retry */
		359	static void
		360	fd_enomem (EV_P)
		361	{
		362	int fd;
		363
		364	for (fd = anfdmax; fd--; )
		365	if (anfds [fd].events)
292	{	366	{
293	ev_io_stop (anfds [fd].head);	367	close (fd);
294	event ((W)anfds [fd].head, EV_ERROR \| EV_READ \| EV_WRITE);	368	fd_kill (EV_A_ fd);
		369	return;
295	}	370	}
		371	}
		372
		373	/* susually called after fork if method needs to re-arm all fds from scratch */
		374	static void
		375	fd_rearm_all (EV_P)
		376	{
		377	int fd;
		378
		379	/* this should be highly optimised to not do anything but set a flag */
		380	for (fd = 0; fd < anfdmax; ++fd)
		381	if (anfds [fd].events)
		382	{
		383	anfds [fd].events = 0;
		384	fd_change (EV_A_ fd);
		385	}
296	}	386	}
297		387
298	/*****************************************************************************/	388	/*****************************************************************************/
299		389
300	static struct ev_timer **timers;
301	static int timermax, timercnt;
302
303	static struct ev_periodic **periodics;
304	static int periodicmax, periodiccnt;
305
306	static void	390	static void
307	upheap (WT *timers, int k)	391	upheap (WT *heap, int k)
308	{	392	{
309	WT w = timers [k];	393	WT w = heap [k];
310		394
311	while (k && timers [k >> 1]->at > w->at)	395	while (k && heap [k >> 1]->at > w->at)
312	{	396	{
313	timers [k] = timers [k >> 1];	397	heap [k] = heap [k >> 1];
314	timers [k]->active = k + 1;	398	((W)heap [k])->active = k + 1;
315	k >>= 1;	399	k >>= 1;
316	}	400	}
317		401
318	timers [k] = w;	402	heap [k] = w;
319	timers [k]->active = k + 1;	403	((W)heap [k])->active = k + 1;
320		404
321	}	405	}
322		406
323	static void	407	static void
324	downheap (WT *timers, int N, int k)	408	downheap (WT *heap, int N, int k)
325	{	409	{
326	WT w = timers [k];	410	WT w = heap [k];
327		411
328	while (k < (N >> 1))	412	while (k < (N >> 1))
329	{	413	{
330	int j = k << 1;	414	int j = k << 1;
331		415
332	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	416	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
333	++j;	417	++j;
334		418
335	if (w->at <= timers [j]->at)	419	if (w->at <= heap [j]->at)
336	break;	420	break;
337		421
338	timers [k] = timers [j];	422	heap [k] = heap [j];
339	timers [k]->active = k + 1;	423	((W)heap [k])->active = k + 1;
340	k = j;	424	k = j;
341	}	425	}
342		426
343	timers [k] = w;	427	heap [k] = w;
344	timers [k]->active = k + 1;	428	((W)heap [k])->active = k + 1;
345	}	429	}
346		430
347	/*****************************************************************************/	431	/*****************************************************************************/
348		432
349	typedef struct	433	typedef struct
350	{	434	{
351	struct ev_signal *head;	435	struct ev_watcher_list *head;
352	sig_atomic_t volatile gotsig;	436	sig_atomic_t volatile gotsig;
353	} ANSIG;	437	} ANSIG;
354		438
355	static ANSIG *signals;	439	static ANSIG *signals;
356	static int signalmax;	440	static int signalmax;
…		…
376	{	460	{
377	signals [signum - 1].gotsig = 1;	461	signals [signum - 1].gotsig = 1;
378		462
379	if (!gotsig)	463	if (!gotsig)
380	{	464	{
		465	int old_errno = errno;
381	gotsig = 1;	466	gotsig = 1;
382	write (sigpipe [1], &signum, 1);	467	write (sigpipe [1], &signum, 1);
		468	errno = old_errno;
383	}	469	}
384	}	470	}
385		471
386	static void	472	static void
387	sigcb (struct ev_io *iow, int revents)	473	sigcb (EV_P_ struct ev_io *iow, int revents)
388	{	474	{
389	struct ev_signal *w;	475	struct ev_watcher_list *w;
390	int signum;	476	int signum;
391		477
392	read (sigpipe [0], &revents, 1);	478	read (sigpipe [0], &revents, 1);
393	gotsig = 0;	479	gotsig = 0;
394		480
…		…
396	if (signals [signum].gotsig)	482	if (signals [signum].gotsig)
397	{	483	{
398	signals [signum].gotsig = 0;	484	signals [signum].gotsig = 0;
399		485
400	for (w = signals [signum].head; w; w = w->next)	486	for (w = signals [signum].head; w; w = w->next)
401	event ((W)w, EV_SIGNAL);	487	event (EV_A_ (W)w, EV_SIGNAL);
402	}	488	}
403	}	489	}
404		490
405	static void	491	static void
406	siginit (void)	492	siginit (EV_P)
407	{	493	{
		494	#ifndef WIN32
408	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	495	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
409	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	496	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
410		497
411	/* rather than sort out wether we really need nb, set it */	498	/* rather than sort out wether we really need nb, set it */
412	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	499	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
413	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	500	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		501	#endif
414		502
415	ev_io_set (&sigev, sigpipe [0], EV_READ);	503	ev_io_set (&sigev, sigpipe [0], EV_READ);
416	ev_io_start (&sigev);	504	ev_io_start (EV_A_ &sigev);
		505	ev_unref (EV_A); /* child watcher should not keep loop alive */
417	}	506	}
418		507
419	/*****************************************************************************/	508	/*****************************************************************************/
420		509
421	static struct ev_idle **idles;	510	#ifndef WIN32
422	static int idlemax, idlecnt;
423
424	static struct ev_prepare **prepares;
425	static int preparemax, preparecnt;
426
427	static struct ev_check **checks;
428	static int checkmax, checkcnt;
429
430	/*****************************************************************************/
431		511
432	static struct ev_child *childs [PID_HASHSIZE];	512	static struct ev_child *childs [PID_HASHSIZE];
433	static struct ev_signal childev;	513	static struct ev_signal childev;
434		514
435	#ifndef WCONTINUED	515	#ifndef WCONTINUED
436	# define WCONTINUED 0	516	# define WCONTINUED 0
437	#endif	517	#endif
438		518
439	static void	519	static void
440	childcb (struct ev_signal *sw, int revents)	520	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
441	{	521	{
442	struct ev_child *w;	522	struct ev_child *w;
		523
		524	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		525	if (w->pid == pid \|\| !w->pid)
		526	{
		527	w->priority = sw->priority; /* need to do it now */
		528	w->rpid = pid;
		529	w->rstatus = status;
		530	event (EV_A_ (W)w, EV_CHILD);
		531	}
		532	}
		533
		534	static void
		535	childcb (EV_P_ struct ev_signal *sw, int revents)
		536	{
443	int pid, status;	537	int pid, status;
444		538
445	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	539	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
446	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	540	{
447	if (w->pid == pid \|\| !w->pid)	541	/* make sure we are called again until all childs have been reaped */
448	{	542	event (EV_A_ (W)sw, EV_SIGNAL);
449	w->status = status;	543
450	event ((W)w, EV_CHILD);	544	child_reap (EV_A_ sw, pid, pid, status);
451	}	545	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		546	}
452	}	547	}
		548
		549	#endif
453		550
454	/*****************************************************************************/	551	/*****************************************************************************/
455		552
		553	#if EV_USE_KQUEUE
		554	# include "ev_kqueue.c"
		555	#endif
456	#if EV_USE_EPOLL	556	#if EV_USE_EPOLL
457	# include "ev_epoll.c"	557	# include "ev_epoll.c"
458	#endif	558	#endif
		559	#if EV_USE_POLL
		560	# include "ev_poll.c"
		561	#endif
459	#if EV_USE_SELECT	562	#if EV_USE_SELECT
460	# include "ev_select.c"	563	# include "ev_select.c"
461	#endif	564	#endif
462		565
463	int	566	int
…		…
470	ev_version_minor (void)	573	ev_version_minor (void)
471	{	574	{
472	return EV_VERSION_MINOR;	575	return EV_VERSION_MINOR;
473	}	576	}
474		577
475	int ev_init (int flags)	578	/* return true if we are running with elevated privileges and should ignore env variables */
		579	static int
		580	enable_secure (void)
476	{	581	{
		582	#ifdef WIN32
		583	return 0;
		584	#else
		585	return getuid () != geteuid ()
		586	\|\| getgid () != getegid ();
		587	#endif
		588	}
		589
		590	int
		591	ev_method (EV_P)
		592	{
		593	return method;
		594	}
		595
		596	static void
		597	loop_init (EV_P_ int methods)
		598	{
477	if (!ev_method)	599	if (!method)
478	{	600	{
479	#if EV_USE_MONOTONIC	601	#if EV_USE_MONOTONIC
480	{	602	{
481	struct timespec ts;	603	struct timespec ts;
482	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	604	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
483	have_monotonic = 1;	605	have_monotonic = 1;
484	}	606	}
485	#endif	607	#endif
486		608
487	ev_now = ev_time ();	609	rt_now = ev_time ();
488	now = get_clock ();	610	mn_now = get_clock ();
489	now_floor = now;	611	now_floor = mn_now;
490	diff = ev_now - now;	612	rtmn_diff = rt_now - mn_now;
491		613
492	if (pipe (sigpipe))	614	if (methods == EVMETHOD_AUTO)
493	return 0;	615	if (!enable_secure () && getenv ("LIBEV_METHODS"))
494		616	methods = atoi (getenv ("LIBEV_METHODS"));
		617	else
495	ev_method = EVMETHOD_NONE;	618	methods = EVMETHOD_ANY;
		619
		620	method = 0;
		621	#if EV_USE_WIN32
		622	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		623	#endif
		624	#if EV_USE_KQUEUE
		625	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
		626	#endif
496	#if EV_USE_EPOLL	627	#if EV_USE_EPOLL
497	if (ev_method == EVMETHOD_NONE) epoll_init (flags);	628	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
		629	#endif
		630	#if EV_USE_POLL
		631	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
498	#endif	632	#endif
499	#if EV_USE_SELECT	633	#if EV_USE_SELECT
500	if (ev_method == EVMETHOD_NONE) select_init (flags);	634	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
501	#endif	635	#endif
		636	}
		637	}
502		638
		639	void
		640	loop_destroy (EV_P)
		641	{
		642	#if EV_USE_WIN32
		643	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		644	#endif
		645	#if EV_USE_KQUEUE
		646	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		647	#endif
		648	#if EV_USE_EPOLL
		649	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		650	#endif
		651	#if EV_USE_POLL
		652	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		653	#endif
		654	#if EV_USE_SELECT
		655	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		656	#endif
		657
		658	method = 0;
		659	/TODO/
		660	}
		661
		662	void
		663	loop_fork (EV_P)
		664	{
		665	/TODO/
		666	#if EV_USE_EPOLL
		667	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		668	#endif
		669	#if EV_USE_KQUEUE
		670	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		671	#endif
		672	}
		673
		674	#if EV_MULTIPLICITY
		675	struct ev_loop *
		676	ev_loop_new (int methods)
		677	{
		678	struct ev_loop loop = (struct ev_loop )calloc (1, sizeof (struct ev_loop));
		679
		680	loop_init (EV_A_ methods);
		681
		682	if (ev_method (EV_A))
		683	return loop;
		684
		685	return 0;
		686	}
		687
		688	void
		689	ev_loop_destroy (EV_P)
		690	{
		691	loop_destroy (EV_A);
		692	free (loop);
		693	}
		694
		695	void
		696	ev_loop_fork (EV_P)
		697	{
		698	loop_fork (EV_A);
		699	}
		700
		701	#endif
		702
		703	#if EV_MULTIPLICITY
		704	struct ev_loop default_loop_struct;
		705	static struct ev_loop *default_loop;
		706
		707	struct ev_loop *
		708	#else
		709	static int default_loop;
		710
		711	int
		712	#endif
		713	ev_default_loop (int methods)
		714	{
		715	if (sigpipe [0] == sigpipe [1])
		716	if (pipe (sigpipe))
		717	return 0;
		718
		719	if (!default_loop)
		720	{
		721	#if EV_MULTIPLICITY
		722	struct ev_loop *loop = default_loop = &default_loop_struct;
		723	#else
		724	default_loop = 1;
		725	#endif
		726
		727	loop_init (EV_A_ methods);
		728
503	if (ev_method)	729	if (ev_method (EV_A))
504	{	730	{
505	ev_watcher_init (&sigev, sigcb);	731	ev_watcher_init (&sigev, sigcb);
		732	ev_set_priority (&sigev, EV_MAXPRI);
506	siginit ();	733	siginit (EV_A);
507		734
		735	#ifndef WIN32
508	ev_signal_init (&childev, childcb, SIGCHLD);	736	ev_signal_init (&childev, childcb, SIGCHLD);
		737	ev_set_priority (&childev, EV_MAXPRI);
509	ev_signal_start (&childev);	738	ev_signal_start (EV_A_ &childev);
		739	ev_unref (EV_A); /* child watcher should not keep loop alive */
		740	#endif
510	}	741	}
		742	else
		743	default_loop = 0;
511	}	744	}
512		745
513	return ev_method;	746	return default_loop;
514	}	747	}
515		748
516	/*****************************************************************************/
517
518	void	749	void
519	ev_fork_prepare (void)	750	ev_default_destroy (void)
520	{	751	{
521	/* nop */	752	#if EV_MULTIPLICITY
522	}	753	struct ev_loop *loop = default_loop;
523
524	void
525	ev_fork_parent (void)
526	{
527	/* nop */
528	}
529
530	void
531	ev_fork_child (void)
532	{
533	#if EV_USE_EPOLL
534	if (ev_method == EVMETHOD_EPOLL)
535	epoll_postfork_child ();
536	#endif	754	#endif
537		755
		756	ev_ref (EV_A); /* child watcher */
		757	ev_signal_stop (EV_A_ &childev);
		758
		759	ev_ref (EV_A); /* signal watcher */
538	ev_io_stop (&sigev);	760	ev_io_stop (EV_A_ &sigev);
		761
		762	close (sigpipe [0]); sigpipe [0] = 0;
		763	close (sigpipe [1]); sigpipe [1] = 0;
		764
		765	loop_destroy (EV_A);
		766	}
		767
		768	void
		769	ev_default_fork (void)
		770	{
		771	#if EV_MULTIPLICITY
		772	struct ev_loop *loop = default_loop;
		773	#endif
		774
		775	loop_fork (EV_A);
		776
		777	ev_io_stop (EV_A_ &sigev);
539	close (sigpipe [0]);	778	close (sigpipe [0]);
540	close (sigpipe [1]);	779	close (sigpipe [1]);
541	pipe (sigpipe);	780	pipe (sigpipe);
		781
		782	ev_ref (EV_A); /* signal watcher */
542	siginit ();	783	siginit (EV_A);
543	}	784	}
544		785
545	/*****************************************************************************/	786	/*****************************************************************************/
546		787
547	static void	788	static void
548	call_pending (void)	789	call_pending (EV_P)
549	{	790	{
		791	int pri;
		792
		793	for (pri = NUMPRI; pri--; )
550	while (pendingcnt)	794	while (pendingcnt [pri])
551	{	795	{
552	ANPENDING *p = pendings + --pendingcnt;	796	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
553		797
554	if (p->w)	798	if (p->w)
555	{	799	{
556	p->w->pending = 0;	800	p->w->pending = 0;
557	p->w->cb (p->w, p->events);	801	p->w->cb (EV_A_ p->w, p->events);
558	}	802	}
559	}	803	}
560	}	804	}
561		805
562	static void	806	static void
563	timers_reify (void)	807	timers_reify (EV_P)
564	{	808	{
565	while (timercnt && timers [0]->at <= now)	809	while (timercnt && timers [0]->at <= mn_now)
566	{	810	{
567	struct ev_timer *w = timers [0];	811	struct ev_timer *w = timers [0];
		812
		813	assert (("inactive timer on timer heap detected", ev_is_active (w)));
568		814
569	/* first reschedule or stop timer */	815	/* first reschedule or stop timer */
570	if (w->repeat)	816	if (w->repeat)
571	{	817	{
572	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	818	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
573	w->at = now + w->repeat;	819	w->at = mn_now + w->repeat;
574	downheap ((WT *)timers, timercnt, 0);	820	downheap ((WT *)timers, timercnt, 0);
575	}	821	}
576	else	822	else
577	ev_timer_stop (w); /* nonrepeating: stop timer */	823	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
578		824
579	event ((W)w, EV_TIMEOUT);	825	event (EV_A_ (W)w, EV_TIMEOUT);
580	}	826	}
581	}	827	}
582		828
583	static void	829	static void
584	periodics_reify (void)	830	periodics_reify (EV_P)
585	{	831	{
586	while (periodiccnt && periodics [0]->at <= ev_now)	832	while (periodiccnt && periodics [0]->at <= rt_now)
587	{	833	{
588	struct ev_periodic *w = periodics [0];	834	struct ev_periodic *w = periodics [0];
		835
		836	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
589		837
590	/* first reschedule or stop timer */	838	/* first reschedule or stop timer */
591	if (w->interval)	839	if (w->interval)
592	{	840	{
593	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	841	w->at += floor ((rt_now - w->at) / w->interval + 1.) * w->interval;
594	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	842	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > rt_now));
595	downheap ((WT *)periodics, periodiccnt, 0);	843	downheap ((WT *)periodics, periodiccnt, 0);
596	}	844	}
597	else	845	else
598	ev_periodic_stop (w); /* nonrepeating: stop timer */	846	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
599		847
600	event ((W)w, EV_PERIODIC);	848	event (EV_A_ (W)w, EV_PERIODIC);
601	}	849	}
602	}	850	}
603		851
604	static void	852	static void
605	periodics_reschedule (ev_tstamp diff)	853	periodics_reschedule (EV_P)
606	{	854	{
607	int i;	855	int i;
608		856
609	/* adjust periodics after time jump */	857	/* adjust periodics after time jump */
610	for (i = 0; i < periodiccnt; ++i)	858	for (i = 0; i < periodiccnt; ++i)
611	{	859	{
612	struct ev_periodic *w = periodics [i];	860	struct ev_periodic *w = periodics [i];
613		861
614	if (w->interval)	862	if (w->interval)
615	{	863	{
616	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	864	ev_tstamp diff = ceil ((rt_now - w->at) / w->interval) * w->interval;
617		865
618	if (fabs (diff) >= 1e-4)	866	if (fabs (diff) >= 1e-4)
619	{	867	{
620	ev_periodic_stop (w);	868	ev_periodic_stop (EV_A_ w);
621	ev_periodic_start (w);	869	ev_periodic_start (EV_A_ w);
622		870
623	i = 0; /* restart loop, inefficient, but time jumps should be rare */	871	i = 0; /* restart loop, inefficient, but time jumps should be rare */
624	}	872	}
625	}	873	}
626	}	874	}
627	}	875	}
628		876
629	static int	877	inline int
630	time_update_monotonic (void)	878	time_update_monotonic (EV_P)
631	{	879	{
632	now = get_clock ();	880	mn_now = get_clock ();
633		881
634	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	882	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
635	{	883	{
636	ev_now = now + diff;	884	rt_now = rtmn_diff + mn_now;
637	return 0;	885	return 0;
638	}	886	}
639	else	887	else
640	{	888	{
641	now_floor = now;	889	now_floor = mn_now;
642	ev_now = ev_time ();	890	rt_now = ev_time ();
643	return 1;	891	return 1;
644	}	892	}
645	}	893	}
646		894
647	static void	895	static void
648	time_update (void)	896	time_update (EV_P)
649	{	897	{
650	int i;	898	int i;
651		899
652	#if EV_USE_MONOTONIC	900	#if EV_USE_MONOTONIC
653	if (expect_true (have_monotonic))	901	if (expect_true (have_monotonic))
654	{	902	{
655	if (time_update_monotonic ())	903	if (time_update_monotonic (EV_A))
656	{	904	{
657	ev_tstamp odiff = diff;	905	ev_tstamp odiff = rtmn_diff;
658		906
659	for (i = 4; --i; ) /* loop a few times, before making important decisions */	907	for (i = 4; --i; ) /* loop a few times, before making important decisions */
660	{	908	{
661	diff = ev_now - now;	909	rtmn_diff = rt_now - mn_now;
662		910
663	if (fabs (odiff - diff) < MIN_TIMEJUMP)	911	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
664	return; /* all is well */	912	return; /* all is well */
665		913
666	ev_now = ev_time ();	914	rt_now = ev_time ();
667	now = get_clock ();	915	mn_now = get_clock ();
668	now_floor = now;	916	now_floor = mn_now;
669	}	917	}
670		918
671	periodics_reschedule (diff - odiff);	919	periodics_reschedule (EV_A);
672	/* no timer adjustment, as the monotonic clock doesn't jump */	920	/* no timer adjustment, as the monotonic clock doesn't jump */
		921	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
673	}	922	}
674	}	923	}
675	else	924	else
676	#endif	925	#endif
677	{	926	{
678	ev_now = ev_time ();	927	rt_now = ev_time ();
679		928
680	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	929	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
681	{	930	{
682	periodics_reschedule (ev_now - now);	931	periodics_reschedule (EV_A);
683		932
684	/* adjust timers. this is easy, as the offset is the same for all */	933	/* adjust timers. this is easy, as the offset is the same for all */
685	for (i = 0; i < timercnt; ++i)	934	for (i = 0; i < timercnt; ++i)
686	timers [i]->at += diff;	935	timers [i]->at += rt_now - mn_now;
687	}	936	}
688		937
689	now = ev_now;	938	mn_now = rt_now;
690	}	939	}
691	}	940	}
692		941
693	int ev_loop_done;	942	void
		943	ev_ref (EV_P)
		944	{
		945	++activecnt;
		946	}
694		947
		948	void
		949	ev_unref (EV_P)
		950	{
		951	--activecnt;
		952	}
		953
		954	static int loop_done;
		955
		956	void
695	void ev_loop (int flags)	957	ev_loop (EV_P_ int flags)
696	{	958	{
697	double block;	959	double block;
698	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	960	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
699		961
700	do	962	do
701	{	963	{
702	/* queue check watchers (and execute them) */	964	/* queue check watchers (and execute them) */
703	if (expect_false (preparecnt))	965	if (expect_false (preparecnt))
704	{	966	{
705	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	967	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
706	call_pending ();	968	call_pending (EV_A);
707	}	969	}
708		970
709	/* update fd-related kernel structures */	971	/* update fd-related kernel structures */
710	fd_reify ();	972	fd_reify (EV_A);
711		973
712	/* calculate blocking time */	974	/* calculate blocking time */
713		975
714	/* we only need this for !monotonic clockor timers, but as we basically	976	/* we only need this for !monotonic clockor timers, but as we basically
715	always have timers, we just calculate it always */	977	always have timers, we just calculate it always */
716	#if EV_USE_MONOTONIC	978	#if EV_USE_MONOTONIC
717	if (expect_true (have_monotonic))	979	if (expect_true (have_monotonic))
718	time_update_monotonic ();	980	time_update_monotonic (EV_A);
719	else	981	else
720	#endif	982	#endif
721	{	983	{
722	ev_now = ev_time ();	984	rt_now = ev_time ();
723	now = ev_now;	985	mn_now = rt_now;
724	}	986	}
725		987
726	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	988	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
727	block = 0.;	989	block = 0.;
728	else	990	else
729	{	991	{
730	block = MAX_BLOCKTIME;	992	block = MAX_BLOCKTIME;
731		993
732	if (timercnt)	994	if (timercnt)
733	{	995	{
734	ev_tstamp to = timers [0]->at - now + method_fudge;	996	ev_tstamp to = timers [0]->at - mn_now + method_fudge;
735	if (block > to) block = to;	997	if (block > to) block = to;
736	}	998	}
737		999
738	if (periodiccnt)	1000	if (periodiccnt)
739	{	1001	{
740	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1002	ev_tstamp to = periodics [0]->at - rt_now + method_fudge;
741	if (block > to) block = to;	1003	if (block > to) block = to;
742	}	1004	}
743		1005
744	if (block < 0.) block = 0.;	1006	if (block < 0.) block = 0.;
745	}	1007	}
746		1008
747	method_poll (block);	1009	method_poll (EV_A_ block);
748		1010
749	/* update ev_now, do magic */	1011	/* update rt_now, do magic */
750	time_update ();	1012	time_update (EV_A);
751		1013
752	/* queue pending timers and reschedule them */	1014	/* queue pending timers and reschedule them */
753	timers_reify (); /* relative timers called last */	1015	timers_reify (EV_A); /* relative timers called last */
754	periodics_reify (); /* absolute timers called first */	1016	periodics_reify (EV_A); /* absolute timers called first */
755		1017
756	/* queue idle watchers unless io or timers are pending */	1018	/* queue idle watchers unless io or timers are pending */
757	if (!pendingcnt)	1019	if (!pendingcnt)
758	queue_events ((W *)idles, idlecnt, EV_IDLE);	1020	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
759		1021
760	/* queue check watchers, to be executed first */	1022	/* queue check watchers, to be executed first */
761	if (checkcnt)	1023	if (checkcnt)
762	queue_events ((W *)checks, checkcnt, EV_CHECK);	1024	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
763		1025
764	call_pending ();	1026	call_pending (EV_A);
765	}	1027	}
766	while (!ev_loop_done);	1028	while (activecnt && !loop_done);
767		1029
768	if (ev_loop_done != 2)	1030	if (loop_done != 2)
769	ev_loop_done = 0;	1031	loop_done = 0;
		1032	}
		1033
		1034	void
		1035	ev_unloop (EV_P_ int how)
		1036	{
		1037	loop_done = how;
770	}	1038	}
771		1039
772	/*****************************************************************************/	1040	/*****************************************************************************/
773		1041
774	static void	1042	inline void
775	wlist_add (WL *head, WL elem)	1043	wlist_add (WL *head, WL elem)
776	{	1044	{
777	elem->next = *head;	1045	elem->next = *head;
778	*head = elem;	1046	*head = elem;
779	}	1047	}
780		1048
781	static void	1049	inline void
782	wlist_del (WL *head, WL elem)	1050	wlist_del (WL *head, WL elem)
783	{	1051	{
784	while (*head)	1052	while (*head)
785	{	1053	{
786	if (*head == elem)	1054	if (*head == elem)
…		…
791		1059
792	head = &(*head)->next;	1060	head = &(*head)->next;
793	}	1061	}
794	}	1062	}
795		1063
796	static void	1064	inline void
797	ev_clear_pending (W w)	1065	ev_clear_pending (EV_P_ W w)
798	{	1066	{
799	if (w->pending)	1067	if (w->pending)
800	{	1068	{
801	pendings [w->pending - 1].w = 0;	1069	pendings [ABSPRI (w)][w->pending - 1].w = 0;
802	w->pending = 0;	1070	w->pending = 0;
803	}	1071	}
804	}	1072	}
805		1073
806	static void	1074	inline void
807	ev_start (W w, int active)	1075	ev_start (EV_P_ W w, int active)
808	{	1076	{
		1077	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
		1078	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
		1079
809	w->active = active;	1080	w->active = active;
		1081	ev_ref (EV_A);
810	}	1082	}
811		1083
812	static void	1084	inline void
813	ev_stop (W w)	1085	ev_stop (EV_P_ W w)
814	{	1086	{
		1087	ev_unref (EV_A);
815	w->active = 0;	1088	w->active = 0;
816	}	1089	}
817		1090
818	/*****************************************************************************/	1091	/*****************************************************************************/
819		1092
820	void	1093	void
821	ev_io_start (struct ev_io *w)	1094	ev_io_start (EV_P_ struct ev_io *w)
822	{	1095	{
823	int fd = w->fd;	1096	int fd = w->fd;
824		1097
825	if (ev_is_active (w))	1098	if (ev_is_active (w))
826	return;	1099	return;
827		1100
828	assert (("ev_io_start called with negative fd", fd >= 0));	1101	assert (("ev_io_start called with negative fd", fd >= 0));
829		1102
830	ev_start ((W)w, 1);	1103	ev_start (EV_A_ (W)w, 1);
831	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1104	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
832	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1105	wlist_add ((WL *)&anfds[fd].head, (WL)w);
833		1106
834	fd_change (fd);	1107	fd_change (EV_A_ fd);
835	}	1108	}
836		1109
837	void	1110	void
838	ev_io_stop (struct ev_io *w)	1111	ev_io_stop (EV_P_ struct ev_io *w)
839	{	1112	{
840	ev_clear_pending ((W)w);	1113	ev_clear_pending (EV_A_ (W)w);
841	if (!ev_is_active (w))	1114	if (!ev_is_active (w))
842	return;	1115	return;
843		1116
844	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1117	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
845	ev_stop ((W)w);	1118	ev_stop (EV_A_ (W)w);
846		1119
847	fd_change (w->fd);	1120	fd_change (EV_A_ w->fd);
848	}	1121	}
849		1122
850	void	1123	void
851	ev_timer_start (struct ev_timer *w)	1124	ev_timer_start (EV_P_ struct ev_timer *w)
852	{	1125	{
853	if (ev_is_active (w))	1126	if (ev_is_active (w))
854	return;	1127	return;
855		1128
856	w->at += now;	1129	w->at += mn_now;
857		1130
858	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1131	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
859		1132
860	ev_start ((W)w, ++timercnt);	1133	ev_start (EV_A_ (W)w, ++timercnt);
861	array_needsize (timers, timermax, timercnt, );	1134	array_needsize (timers, timermax, timercnt, );
862	timers [timercnt - 1] = w;	1135	timers [timercnt - 1] = w;
863	upheap ((WT *)timers, timercnt - 1);	1136	upheap ((WT *)timers, timercnt - 1);
864	}
865		1137
		1138	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1139	}
		1140
866	void	1141	void
867	ev_timer_stop (struct ev_timer *w)	1142	ev_timer_stop (EV_P_ struct ev_timer *w)
868	{	1143	{
869	ev_clear_pending ((W)w);	1144	ev_clear_pending (EV_A_ (W)w);
870	if (!ev_is_active (w))	1145	if (!ev_is_active (w))
871	return;	1146	return;
872		1147
		1148	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1149
873	if (w->active < timercnt--)	1150	if (((W)w)->active < timercnt--)
874	{	1151	{
875	timers [w->active - 1] = timers [timercnt];	1152	timers [((W)w)->active - 1] = timers [timercnt];
876	downheap ((WT *)timers, timercnt, w->active - 1);	1153	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
877	}	1154	}
878		1155
879	w->at = w->repeat;	1156	w->at = w->repeat;
880		1157
881	ev_stop ((W)w);	1158	ev_stop (EV_A_ (W)w);
882	}	1159	}
883		1160
884	void	1161	void
885	ev_timer_again (struct ev_timer *w)	1162	ev_timer_again (EV_P_ struct ev_timer *w)
886	{	1163	{
887	if (ev_is_active (w))	1164	if (ev_is_active (w))
888	{	1165	{
889	if (w->repeat)	1166	if (w->repeat)
890	{	1167	{
891	w->at = now + w->repeat;	1168	w->at = mn_now + w->repeat;
892	downheap ((WT *)timers, timercnt, w->active - 1);	1169	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
893	}	1170	}
894	else	1171	else
895	ev_timer_stop (w);	1172	ev_timer_stop (EV_A_ w);
896	}	1173	}
897	else if (w->repeat)	1174	else if (w->repeat)
898	ev_timer_start (w);	1175	ev_timer_start (EV_A_ w);
899	}	1176	}
900		1177
901	void	1178	void
902	ev_periodic_start (struct ev_periodic *w)	1179	ev_periodic_start (EV_P_ struct ev_periodic *w)
903	{	1180	{
904	if (ev_is_active (w))	1181	if (ev_is_active (w))
905	return;	1182	return;
906		1183
907	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1184	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
908		1185
909	/* this formula differs from the one in periodic_reify because we do not always round up */	1186	/* this formula differs from the one in periodic_reify because we do not always round up */
910	if (w->interval)	1187	if (w->interval)
911	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1188	w->at += ceil ((rt_now - w->at) / w->interval) * w->interval;
912		1189
913	ev_start ((W)w, ++periodiccnt);	1190	ev_start (EV_A_ (W)w, ++periodiccnt);
914	array_needsize (periodics, periodicmax, periodiccnt, );	1191	array_needsize (periodics, periodicmax, periodiccnt, );
915	periodics [periodiccnt - 1] = w;	1192	periodics [periodiccnt - 1] = w;
916	upheap ((WT *)periodics, periodiccnt - 1);	1193	upheap ((WT *)periodics, periodiccnt - 1);
917	}
918		1194
		1195	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1196	}
		1197
919	void	1198	void
920	ev_periodic_stop (struct ev_periodic *w)	1199	ev_periodic_stop (EV_P_ struct ev_periodic *w)
921	{	1200	{
922	ev_clear_pending ((W)w);	1201	ev_clear_pending (EV_A_ (W)w);
923	if (!ev_is_active (w))	1202	if (!ev_is_active (w))
924	return;	1203	return;
925		1204
		1205	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1206
926	if (w->active < periodiccnt--)	1207	if (((W)w)->active < periodiccnt--)
927	{	1208	{
928	periodics [w->active - 1] = periodics [periodiccnt];	1209	periodics [((W)w)->active - 1] = periodics [periodiccnt];
929	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1210	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
930	}	1211	}
931		1212
932	ev_stop ((W)w);	1213	ev_stop (EV_A_ (W)w);
933	}	1214	}
934		1215
935	void	1216	void
936	ev_signal_start (struct ev_signal *w)	1217	ev_idle_start (EV_P_ struct ev_idle *w)
937	{	1218	{
938	if (ev_is_active (w))	1219	if (ev_is_active (w))
939	return;	1220	return;
940		1221
		1222	ev_start (EV_A_ (W)w, ++idlecnt);
		1223	array_needsize (idles, idlemax, idlecnt, );
		1224	idles [idlecnt - 1] = w;
		1225	}
		1226
		1227	void
		1228	ev_idle_stop (EV_P_ struct ev_idle *w)
		1229	{
		1230	ev_clear_pending (EV_A_ (W)w);
		1231	if (ev_is_active (w))
		1232	return;
		1233
		1234	idles [((W)w)->active - 1] = idles [--idlecnt];
		1235	ev_stop (EV_A_ (W)w);
		1236	}
		1237
		1238	void
		1239	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1240	{
		1241	if (ev_is_active (w))
		1242	return;
		1243
		1244	ev_start (EV_A_ (W)w, ++preparecnt);
		1245	array_needsize (prepares, preparemax, preparecnt, );
		1246	prepares [preparecnt - 1] = w;
		1247	}
		1248
		1249	void
		1250	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1251	{
		1252	ev_clear_pending (EV_A_ (W)w);
		1253	if (ev_is_active (w))
		1254	return;
		1255
		1256	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1257	ev_stop (EV_A_ (W)w);
		1258	}
		1259
		1260	void
		1261	ev_check_start (EV_P_ struct ev_check *w)
		1262	{
		1263	if (ev_is_active (w))
		1264	return;
		1265
		1266	ev_start (EV_A_ (W)w, ++checkcnt);
		1267	array_needsize (checks, checkmax, checkcnt, );
		1268	checks [checkcnt - 1] = w;
		1269	}
		1270
		1271	void
		1272	ev_check_stop (EV_P_ struct ev_check *w)
		1273	{
		1274	ev_clear_pending (EV_A_ (W)w);
		1275	if (ev_is_active (w))
		1276	return;
		1277
		1278	checks [((W)w)->active - 1] = checks [--checkcnt];
		1279	ev_stop (EV_A_ (W)w);
		1280	}
		1281
		1282	#ifndef SA_RESTART
		1283	# define SA_RESTART 0
		1284	#endif
		1285
		1286	void
		1287	ev_signal_start (EV_P_ struct ev_signal *w)
		1288	{
		1289	#if EV_MULTIPLICITY
		1290	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1291	#endif
		1292	if (ev_is_active (w))
		1293	return;
		1294
941	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1295	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
942		1296
943	ev_start ((W)w, 1);	1297	ev_start (EV_A_ (W)w, 1);
944	array_needsize (signals, signalmax, w->signum, signals_init);	1298	array_needsize (signals, signalmax, w->signum, signals_init);
945	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1299	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
946		1300
947	if (!w->next)	1301	if (!w->next)
948	{	1302	{
949	struct sigaction sa;	1303	struct sigaction sa;
950	sa.sa_handler = sighandler;	1304	sa.sa_handler = sighandler;
951	sigfillset (&sa.sa_mask);	1305	sigfillset (&sa.sa_mask);
952	sa.sa_flags = 0;	1306	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
953	sigaction (w->signum, &sa, 0);	1307	sigaction (w->signum, &sa, 0);
954	}	1308	}
955	}	1309	}
956		1310
957	void	1311	void
958	ev_signal_stop (struct ev_signal *w)	1312	ev_signal_stop (EV_P_ struct ev_signal *w)
959	{	1313	{
960	ev_clear_pending ((W)w);	1314	ev_clear_pending (EV_A_ (W)w);
961	if (!ev_is_active (w))	1315	if (!ev_is_active (w))
962	return;	1316	return;
963		1317
964	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1318	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
965	ev_stop ((W)w);	1319	ev_stop (EV_A_ (W)w);
966		1320
967	if (!signals [w->signum - 1].head)	1321	if (!signals [w->signum - 1].head)
968	signal (w->signum, SIG_DFL);	1322	signal (w->signum, SIG_DFL);
969	}	1323	}
970		1324
971	void	1325	void
972	ev_idle_start (struct ev_idle *w)	1326	ev_child_start (EV_P_ struct ev_child *w)
973	{	1327	{
		1328	#if EV_MULTIPLICITY
		1329	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1330	#endif
974	if (ev_is_active (w))	1331	if (ev_is_active (w))
975	return;	1332	return;
976		1333
977	ev_start ((W)w, ++idlecnt);	1334	ev_start (EV_A_ (W)w, 1);
978	array_needsize (idles, idlemax, idlecnt, );	1335	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
979	idles [idlecnt - 1] = w;
980	}	1336	}
981		1337
982	void	1338	void
983	ev_idle_stop (struct ev_idle *w)	1339	ev_child_stop (EV_P_ struct ev_child *w)
984	{	1340	{
985	ev_clear_pending ((W)w);	1341	ev_clear_pending (EV_A_ (W)w);
986	if (ev_is_active (w))	1342	if (ev_is_active (w))
987	return;	1343	return;
988		1344
989	idles [w->active - 1] = idles [--idlecnt];
990	ev_stop ((W)w);
991	}
992
993	void
994	ev_prepare_start (struct ev_prepare *w)
995	{
996	if (ev_is_active (w))
997	return;
998
999	ev_start ((W)w, ++preparecnt);
1000	array_needsize (prepares, preparemax, preparecnt, );
1001	prepares [preparecnt - 1] = w;
1002	}
1003
1004	void
1005	ev_prepare_stop (struct ev_prepare *w)
1006	{
1007	ev_clear_pending ((W)w);
1008	if (ev_is_active (w))
1009	return;
1010
1011	prepares [w->active - 1] = prepares [--preparecnt];
1012	ev_stop ((W)w);
1013	}
1014
1015	void
1016	ev_check_start (struct ev_check *w)
1017	{
1018	if (ev_is_active (w))
1019	return;
1020
1021	ev_start ((W)w, ++checkcnt);
1022	array_needsize (checks, checkmax, checkcnt, );
1023	checks [checkcnt - 1] = w;
1024	}
1025
1026	void
1027	ev_check_stop (struct ev_check *w)
1028	{
1029	ev_clear_pending ((W)w);
1030	if (ev_is_active (w))
1031	return;
1032
1033	checks [w->active - 1] = checks [--checkcnt];
1034	ev_stop ((W)w);
1035	}
1036
1037	void
1038	ev_child_start (struct ev_child *w)
1039	{
1040	if (ev_is_active (w))
1041	return;
1042
1043	ev_start ((W)w, 1);
1044	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1045	}
1046
1047	void
1048	ev_child_stop (struct ev_child *w)
1049	{
1050	ev_clear_pending ((W)w);
1051	if (ev_is_active (w))
1052	return;
1053
1054	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1345	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1055	ev_stop ((W)w);	1346	ev_stop (EV_A_ (W)w);
1056	}	1347	}
1057		1348
1058	/*****************************************************************************/	1349	/*****************************************************************************/
1059		1350
1060	struct ev_once	1351	struct ev_once
…		…
1064	void (cb)(int revents, void arg);	1355	void (cb)(int revents, void arg);
1065	void *arg;	1356	void *arg;
1066	};	1357	};
1067		1358
1068	static void	1359	static void
1069	once_cb (struct ev_once *once, int revents)	1360	once_cb (EV_P_ struct ev_once *once, int revents)
1070	{	1361	{
1071	void (cb)(int revents, void arg) = once->cb;	1362	void (cb)(int revents, void arg) = once->cb;
1072	void *arg = once->arg;	1363	void *arg = once->arg;
1073		1364
1074	ev_io_stop (&once->io);	1365	ev_io_stop (EV_A_ &once->io);
1075	ev_timer_stop (&once->to);	1366	ev_timer_stop (EV_A_ &once->to);
1076	free (once);	1367	free (once);
1077		1368
1078	cb (revents, arg);	1369	cb (revents, arg);
1079	}	1370	}
1080		1371
1081	static void	1372	static void
1082	once_cb_io (struct ev_io *w, int revents)	1373	once_cb_io (EV_P_ struct ev_io *w, int revents)
1083	{	1374	{
1084	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1375	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1085	}	1376	}
1086		1377
1087	static void	1378	static void
1088	once_cb_to (struct ev_timer *w, int revents)	1379	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1089	{	1380	{
1090	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1381	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1091	}	1382	}
1092		1383
1093	void	1384	void
1094	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1385	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1095	{	1386	{
1096	struct ev_once *once = malloc (sizeof (struct ev_once));	1387	struct ev_once *once = malloc (sizeof (struct ev_once));
1097		1388
1098	if (!once)	1389	if (!once)
1099	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1390	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
…		…
1104		1395
1105	ev_watcher_init (&once->io, once_cb_io);	1396	ev_watcher_init (&once->io, once_cb_io);
1106	if (fd >= 0)	1397	if (fd >= 0)
1107	{	1398	{
1108	ev_io_set (&once->io, fd, events);	1399	ev_io_set (&once->io, fd, events);
1109	ev_io_start (&once->io);	1400	ev_io_start (EV_A_ &once->io);
1110	}	1401	}
1111		1402
1112	ev_watcher_init (&once->to, once_cb_to);	1403	ev_watcher_init (&once->to, once_cb_to);
1113	if (timeout >= 0.)	1404	if (timeout >= 0.)
1114	{	1405	{
1115	ev_timer_set (&once->to, timeout, 0.);	1406	ev_timer_set (&once->to, timeout, 0.);
1116	ev_timer_start (&once->to);	1407	ev_timer_start (EV_A_ &once->to);
1117	}	1408	}
1118	}	1409	}
1119	}	1410	}
1120		1411
1121	/*****************************************************************************/
1122
1123	#if 0
1124
1125	struct ev_io wio;
1126
1127	static void
1128	sin_cb (struct ev_io *w, int revents)
1129	{
1130	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1131	}
1132
1133	static void
1134	ocb (struct ev_timer *w, int revents)
1135	{
1136	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1137	ev_timer_stop (w);
1138	ev_timer_start (w);
1139	}
1140
1141	static void
1142	scb (struct ev_signal *w, int revents)
1143	{
1144	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1145	ev_io_stop (&wio);
1146	ev_io_start (&wio);
1147	}
1148
1149	static void
1150	gcb (struct ev_signal *w, int revents)
1151	{
1152	fprintf (stderr, "generic %x\n", revents);
1153
1154	}
1155
1156	int main (void)
1157	{
1158	ev_init (0);
1159
1160	ev_io_init (&wio, sin_cb, 0, EV_READ);
1161	ev_io_start (&wio);
1162
1163	struct ev_timer t[10000];
1164
1165	#if 0
1166	int i;
1167	for (i = 0; i < 10000; ++i)
1168	{
1169	struct ev_timer *w = t + i;
1170	ev_watcher_init (w, ocb, i);
1171	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1172	ev_timer_start (w);
1173	if (drand48 () < 0.5)
1174	ev_timer_stop (w);
1175	}
1176	#endif
1177
1178	struct ev_timer t1;
1179	ev_timer_init (&t1, ocb, 5, 10);
1180	ev_timer_start (&t1);
1181
1182	struct ev_signal sig;
1183	ev_signal_init (&sig, scb, SIGQUIT);
1184	ev_signal_start (&sig);
1185
1186	struct ev_check cw;
1187	ev_check_init (&cw, gcb);
1188	ev_check_start (&cw);
1189
1190	struct ev_idle iw;
1191	ev_idle_init (&iw, gcb);
1192	ev_idle_start (&iw);
1193
1194	ev_loop (0);
1195
1196	return 0;
1197	}
1198
1199	#endif
1200
1201
1202
1203

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Comparing libev/ev.c (file contents): Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs. Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.40 by root, Fri Nov 2 11:02:23 2007 UTC vs.
Revision 1.62 by root, Sun Nov 4 20:38:07 2007 UTC