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

Comparing libev/ev.c (file contents):
Revision 1.45 by root, Sat Nov 3 09:19:58 2007 UTC vs.
Revision 1.75 by root, Tue Nov 6 19:29:20 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>
38	#include <fcntl.h>	59	#include <fcntl.h>
39	#include <signal.h>
40	#include <stddef.h>	60	#include <stddef.h>
41		61
42	#include <stdio.h>	62	#include <stdio.h>
43		63
44	#include <assert.h>	64	#include <assert.h>
45	#include <errno.h>	65	#include <errno.h>
46	#include <sys/types.h>	66	#include <sys/types.h>
		67	#include <time.h>
		68
		69	#include <signal.h>
		70
47	#ifndef WIN32	71	#ifndef WIN32
		72	# include <unistd.h>
		73	# include <sys/time.h>
48	# include <sys/wait.h>	74	# include <sys/wait.h>
49	#endif	75	#endif
50	#include <sys/time.h>
51	#include <time.h>
52
53	/**/	76	/**/
54		77
55	#ifndef EV_USE_MONOTONIC	78	#ifndef EV_USE_MONOTONIC
56	# define EV_USE_MONOTONIC 1	79	# define EV_USE_MONOTONIC 1
57	#endif	80	#endif
…		…
68	# define EV_USE_EPOLL 0	91	# define EV_USE_EPOLL 0
69	#endif	92	#endif
70		93
71	#ifndef EV_USE_KQUEUE	94	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	95	# define EV_USE_KQUEUE 0
		96	#endif
		97
		98	#ifndef EV_USE_WIN32
		99	# ifdef WIN32
		100	# define EV_USE_WIN32 0 /* it does not exist, use select */
		101	# undef EV_USE_SELECT
		102	# define EV_USE_SELECT 1
		103	# else
		104	# define EV_USE_WIN32 0
		105	# endif
73	#endif	106	#endif
74		107
75	#ifndef EV_USE_REALTIME	108	#ifndef EV_USE_REALTIME
76	# define EV_USE_REALTIME 1	109	# define EV_USE_REALTIME 1
77	#endif	110	#endif
…		…
113		146
114	typedef struct ev_watcher *W;	147	typedef struct ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	148	typedef struct ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	149	typedef struct ev_watcher_time *WT;
117		150
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	151	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
119	ev_tstamp ev_now;
120	int ev_method;
121		152
122	static int have_monotonic; /* runtime */	153	#include "ev_win32.c"
123
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
125	static void (*method_modify)(int fd, int oev, int nev);
126	static void (*method_poll)(ev_tstamp timeout);
127		154
128	/*****************************************************************************/	155	/*****************************************************************************/
129		156
130	ev_tstamp	157	static void (syserr_cb)(const char msg);
		158
		159	void ev_set_syserr_cb (void (cb)(const char msg))
		160	{
		161	syserr_cb = cb;
		162	}
		163
		164	static void
		165	syserr (const char *msg)
		166	{
		167	if (!msg)
		168	msg = "(libev) system error";
		169
		170	if (syserr_cb)
		171	syserr_cb (msg);
		172	else
		173	{
		174	perror (msg);
		175	abort ();
		176	}
		177	}
		178
		179	static void (alloc)(void *ptr, long size);
		180
		181	void ev_set_allocator (void (cb)(void *ptr, long size))
		182	{
		183	alloc = cb;
		184	}
		185
		186	static void *
		187	ev_realloc (void *ptr, long size)
		188	{
		189	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		190
		191	if (!ptr && size)
		192	{
		193	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		194	abort ();
		195	}
		196
		197	return ptr;
		198	}
		199
		200	#define ev_malloc(size) ev_realloc (0, (size))
		201	#define ev_free(ptr) ev_realloc ((ptr), 0)
		202
		203	/*****************************************************************************/
		204
		205	typedef struct
		206	{
		207	WL head;
		208	unsigned char events;
		209	unsigned char reify;
		210	} ANFD;
		211
		212	typedef struct
		213	{
		214	W w;
		215	int events;
		216	} ANPENDING;
		217
		218	#if EV_MULTIPLICITY
		219
		220	struct ev_loop
		221	{
		222	# define VAR(name,decl) decl;
		223	# include "ev_vars.h"
		224	};
		225	# undef VAR
		226	# include "ev_wrap.h"
		227
		228	#else
		229
		230	# define VAR(name,decl) static decl;
		231	# include "ev_vars.h"
		232	# undef VAR
		233
		234	#endif
		235
		236	/*****************************************************************************/
		237
		238	inline ev_tstamp
131	ev_time (void)	239	ev_time (void)
132	{	240	{
133	#if EV_USE_REALTIME	241	#if EV_USE_REALTIME
134	struct timespec ts;	242	struct timespec ts;
135	clock_gettime (CLOCK_REALTIME, &ts);	243	clock_gettime (CLOCK_REALTIME, &ts);
…		…
139	gettimeofday (&tv, 0);	247	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	248	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	249	#endif
142	}	250	}
143		251
144	static ev_tstamp	252	inline ev_tstamp
145	get_clock (void)	253	get_clock (void)
146	{	254	{
147	#if EV_USE_MONOTONIC	255	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	256	if (expect_true (have_monotonic))
149	{	257	{
…		…
154	#endif	262	#endif
155		263
156	return ev_time ();	264	return ev_time ();
157	}	265	}
158		266
		267	ev_tstamp
		268	ev_now (EV_P)
		269	{
		270	return rt_now;
		271	}
		272
159	#define array_roundsize(base,n) ((n) \| 4 & ~3)	273	#define array_roundsize(type,n) ((n) \| 4 & ~3)
160		274
161	#define array_needsize(base,cur,cnt,init) \	275	#define array_needsize(type,base,cur,cnt,init) \
162	if (expect_false ((cnt) > cur)) \	276	if (expect_false ((cnt) > cur)) \
163	{ \	277	{ \
164	int newcnt = cur; \	278	int newcnt = cur; \
165	do \	279	do \
166	{ \	280	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \	281	newcnt = array_roundsize (type, newcnt << 1); \
168	} \	282	} \
169	while ((cnt) > newcnt); \	283	while ((cnt) > newcnt); \
170	\	284	\
171	base = realloc (base, sizeof (base) (newcnt)); \	285	base = (type )ev_realloc (base, sizeof (type) (newcnt));\
172	init (base + cur, newcnt - cur); \	286	init (base + cur, newcnt - cur); \
173	cur = newcnt; \	287	cur = newcnt; \
174	}	288	}
		289
		290	#define array_slim(type,stem) \
		291	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		292	{ \
		293	stem ## max = array_roundsize (stem ## cnt >> 1); \
		294	base = (type )ev_realloc (base, sizeof (type) (stem ## max));\
		295	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/D/\
		296	}
		297
		298	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		299	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		300	#define array_free_microshit(stem) \
		301	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		302
		303	#define array_free(stem, idx) \
		304	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
175		305
176	/*****************************************************************************/	306	/*****************************************************************************/
177
178	typedef struct
179	{
180	struct ev_io *head;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184
185	static ANFD *anfds;
186	static int anfdmax;
187		307
188	static void	308	static void
189	anfds_init (ANFD *base, int count)	309	anfds_init (ANFD *base, int count)
190	{	310	{
191	while (count--)	311	while (count--)
…		…
196		316
197	++base;	317	++base;
198	}	318	}
199	}	319	}
200		320
201	typedef struct
202	{
203	W w;
204	int events;
205	} ANPENDING;
206
207	static ANPENDING *pendings [NUMPRI];
208	static int pendingmax [NUMPRI], pendingcnt [NUMPRI];
209
210	static void	321	static void
211	event (W w, int events)	322	event (EV_P_ W w, int events)
212	{	323	{
213	if (w->pending)	324	if (w->pending)
214	{	325	{
215	pendings [ABSPRI (w)][w->pending - 1].events \|= events;	326	pendings [ABSPRI (w)][w->pending - 1].events \|= events;
216	return;	327	return;
217	}	328	}
218		329
219	w->pending = ++pendingcnt [ABSPRI (w)];	330	w->pending = ++pendingcnt [ABSPRI (w)];
220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );	331	array_needsize (ANPENDING, pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
221	pendings [ABSPRI (w)][w->pending - 1].w = w;	332	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;	333	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}	334	}
224		335
225	static void	336	static void
226	queue_events (W *events, int eventcnt, int type)	337	queue_events (EV_P_ W *events, int eventcnt, int type)
227	{	338	{
228	int i;	339	int i;
229		340
230	for (i = 0; i < eventcnt; ++i)	341	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);	342	event (EV_A_ events [i], type);
232	}	343	}
233		344
234	static void	345	static void
235	fd_event (int fd, int events)	346	fd_event (EV_P_ int fd, int events)
236	{	347	{
237	ANFD *anfd = anfds + fd;	348	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	349	struct ev_io *w;
239		350
240	for (w = anfd->head; w; w = w->next)	351	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
241	{	352	{
242	int ev = w->events & events;	353	int ev = w->events & events;
243		354
244	if (ev)	355	if (ev)
245	event ((W)w, ev);	356	event (EV_A_ (W)w, ev);
246	}	357	}
247	}	358	}
248		359
249	/*****************************************************************************/	360	/*****************************************************************************/
250		361
251	static int *fdchanges;
252	static int fdchangemax, fdchangecnt;
253
254	static void	362	static void
255	fd_reify (void)	363	fd_reify (EV_P)
256	{	364	{
257	int i;	365	int i;
258		366
259	for (i = 0; i < fdchangecnt; ++i)	367	for (i = 0; i < fdchangecnt; ++i)
260	{	368	{
…		…
262	ANFD *anfd = anfds + fd;	370	ANFD *anfd = anfds + fd;
263	struct ev_io *w;	371	struct ev_io *w;
264		372
265	int events = 0;	373	int events = 0;
266		374
267	for (w = anfd->head; w; w = w->next)	375	for (w = (struct ev_io )anfd->head; w; w = (struct ev_io )((WL)w)->next)
268	events \|= w->events;	376	events \|= w->events;
269		377
270	anfd->reify = 0;	378	anfd->reify = 0;
271		379
272	if (anfd->events != events)
273	{
274	method_modify (fd, anfd->events, events);	380	method_modify (EV_A_ fd, anfd->events, events);
275	anfd->events = events;	381	anfd->events = events;
276	}
277	}	382	}
278		383
279	fdchangecnt = 0;	384	fdchangecnt = 0;
280	}	385	}
281		386
282	static void	387	static void
283	fd_change (int fd)	388	fd_change (EV_P_ int fd)
284	{	389	{
285	if (anfds [fd].reify \|\| fdchangecnt < 0)	390	if (anfds [fd].reify)
286	return;	391	return;
287		392
288	anfds [fd].reify = 1;	393	anfds [fd].reify = 1;
289		394
290	++fdchangecnt;	395	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	396	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, (void));
292	fdchanges [fdchangecnt - 1] = fd;	397	fdchanges [fdchangecnt - 1] = fd;
293	}	398	}
294		399
295	static void	400	static void
296	fd_kill (int fd)	401	fd_kill (EV_P_ int fd)
297	{	402	{
298	struct ev_io *w;	403	struct ev_io *w;
299		404
300	printf ("killing fd %d\n", fd);//D
301	while ((w = anfds [fd].head))	405	while ((w = (struct ev_io *)anfds [fd].head))
302	{	406	{
303	ev_io_stop (w);	407	ev_io_stop (EV_A_ w);
304	event ((W)w, EV_ERROR \| EV_READ \| EV_WRITE);	408	event (EV_A_ (W)w, EV_ERROR \| EV_READ \| EV_WRITE);
305	}	409	}
		410	}
		411
		412	static int
		413	fd_valid (int fd)
		414	{
		415	#ifdef WIN32
		416	return !!win32_get_osfhandle (fd);
		417	#else
		418	return fcntl (fd, F_GETFD) != -1;
		419	#endif
306	}	420	}
307		421
308	/* called on EBADF to verify fds */	422	/* called on EBADF to verify fds */
309	static void	423	static void
310	fd_ebadf (void)	424	fd_ebadf (EV_P)
311	{	425	{
312	int fd;	426	int fd;
313		427
314	for (fd = 0; fd < anfdmax; ++fd)	428	for (fd = 0; fd < anfdmax; ++fd)
315	if (anfds [fd].events)	429	if (anfds [fd].events)
316	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	430	if (!fd_valid (fd) == -1 && errno == EBADF)
317	fd_kill (fd);	431	fd_kill (EV_A_ fd);
318	}	432	}
319		433
320	/* called on ENOMEM in select/poll to kill some fds and retry */	434	/* called on ENOMEM in select/poll to kill some fds and retry */
321	static void	435	static void
322	fd_enomem (void)	436	fd_enomem (EV_P)
323	{	437	{
324	int fd = anfdmax;	438	int fd;
325		439
326	while (fd--)	440	for (fd = anfdmax; fd--; )
327	if (anfds [fd].events)	441	if (anfds [fd].events)
328	{	442	{
329	close (fd);
330	fd_kill (fd);	443	fd_kill (EV_A_ fd);
331	return;	444	return;
332	}	445	}
333	}	446	}
334		447
		448	/* usually called after fork if method needs to re-arm all fds from scratch */
		449	static void
		450	fd_rearm_all (EV_P)
		451	{
		452	int fd;
		453
		454	/* this should be highly optimised to not do anything but set a flag */
		455	for (fd = 0; fd < anfdmax; ++fd)
		456	if (anfds [fd].events)
		457	{
		458	anfds [fd].events = 0;
		459	fd_change (EV_A_ fd);
		460	}
		461	}
		462
335	/*****************************************************************************/	463	/*****************************************************************************/
336		464
337	static struct ev_timer **timers;
338	static int timermax, timercnt;
339
340	static struct ev_periodic **periodics;
341	static int periodicmax, periodiccnt;
342
343	static void	465	static void
344	upheap (WT *timers, int k)	466	upheap (WT *heap, int k)
345	{	467	{
346	WT w = timers [k];	468	WT w = heap [k];
347		469
348	while (k && timers [k >> 1]->at > w->at)	470	while (k && heap [k >> 1]->at > w->at)
349	{	471	{
350	timers [k] = timers [k >> 1];	472	heap [k] = heap [k >> 1];
351	timers [k]->active = k + 1;	473	((W)heap [k])->active = k + 1;
352	k >>= 1;	474	k >>= 1;
353	}	475	}
354		476
355	timers [k] = w;	477	heap [k] = w;
356	timers [k]->active = k + 1;	478	((W)heap [k])->active = k + 1;
357		479
358	}	480	}
359		481
360	static void	482	static void
361	downheap (WT *timers, int N, int k)	483	downheap (WT *heap, int N, int k)
362	{	484	{
363	WT w = timers [k];	485	WT w = heap [k];
364		486
365	while (k < (N >> 1))	487	while (k < (N >> 1))
366	{	488	{
367	int j = k << 1;	489	int j = k << 1;
368		490
369	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	491	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
370	++j;	492	++j;
371		493
372	if (w->at <= timers [j]->at)	494	if (w->at <= heap [j]->at)
373	break;	495	break;
374		496
375	timers [k] = timers [j];	497	heap [k] = heap [j];
376	timers [k]->active = k + 1;	498	((W)heap [k])->active = k + 1;
377	k = j;	499	k = j;
378	}	500	}
379		501
380	timers [k] = w;	502	heap [k] = w;
381	timers [k]->active = k + 1;	503	((W)heap [k])->active = k + 1;
382	}	504	}
383		505
384	/*****************************************************************************/	506	/*****************************************************************************/
385		507
386	typedef struct	508	typedef struct
387	{	509	{
388	struct ev_signal *head;	510	WL head;
389	sig_atomic_t volatile gotsig;	511	sig_atomic_t volatile gotsig;
390	} ANSIG;	512	} ANSIG;
391		513
392	static ANSIG *signals;	514	static ANSIG *signals;
393	static int signalmax;	515	static int signalmax;
…		…
409	}	531	}
410		532
411	static void	533	static void
412	sighandler (int signum)	534	sighandler (int signum)
413	{	535	{
		536	#if WIN32
		537	signal (signum, sighandler);
		538	#endif
		539
414	signals [signum - 1].gotsig = 1;	540	signals [signum - 1].gotsig = 1;
415		541
416	if (!gotsig)	542	if (!gotsig)
417	{	543	{
		544	int old_errno = errno;
418	gotsig = 1;	545	gotsig = 1;
		546	#ifdef WIN32
		547	send (sigpipe [1], &signum, 1, MSG_DONTWAIT);
		548	#else
419	write (sigpipe [1], &signum, 1);	549	write (sigpipe [1], &signum, 1);
		550	#endif
		551	errno = old_errno;
420	}	552	}
421	}	553	}
422		554
423	static void	555	static void
424	sigcb (struct ev_io *iow, int revents)	556	sigcb (EV_P_ struct ev_io *iow, int revents)
425	{	557	{
426	struct ev_signal *w;	558	WL w;
427	int signum;	559	int signum;
428		560
		561	#ifdef WIN32
		562	recv (sigpipe [0], &revents, 1, MSG_DONTWAIT);
		563	#else
429	read (sigpipe [0], &revents, 1);	564	read (sigpipe [0], &revents, 1);
		565	#endif
430	gotsig = 0;	566	gotsig = 0;
431		567
432	for (signum = signalmax; signum--; )	568	for (signum = signalmax; signum--; )
433	if (signals [signum].gotsig)	569	if (signals [signum].gotsig)
434	{	570	{
435	signals [signum].gotsig = 0;	571	signals [signum].gotsig = 0;
436		572
437	for (w = signals [signum].head; w; w = w->next)	573	for (w = signals [signum].head; w; w = w->next)
438	event ((W)w, EV_SIGNAL);	574	event (EV_A_ (W)w, EV_SIGNAL);
439	}	575	}
440	}	576	}
441		577
442	static void	578	static void
443	siginit (void)	579	siginit (EV_P)
444	{	580	{
445	#ifndef WIN32	581	#ifndef WIN32
446	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	582	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
447	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	583	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
448		584
…		…
450	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	586	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
451	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	587	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
452	#endif	588	#endif
453		589
454	ev_io_set (&sigev, sigpipe [0], EV_READ);	590	ev_io_set (&sigev, sigpipe [0], EV_READ);
455	ev_io_start (&sigev);	591	ev_io_start (EV_A_ &sigev);
		592	ev_unref (EV_A); /* child watcher should not keep loop alive */
456	}	593	}
457		594
458	/*****************************************************************************/	595	/*****************************************************************************/
459		596
460	static struct ev_idle **idles;
461	static int idlemax, idlecnt;
462
463	static struct ev_prepare **prepares;
464	static int preparemax, preparecnt;
465
466	static struct ev_check **checks;
467	static int checkmax, checkcnt;
468
469	/*****************************************************************************/
470
471	static struct ev_child *childs [PID_HASHSIZE];	597	static struct ev_child *childs [PID_HASHSIZE];
		598
		599	#ifndef WIN32
		600
472	static struct ev_signal childev;	601	static struct ev_signal childev;
473
474	#ifndef WIN32
475		602
476	#ifndef WCONTINUED	603	#ifndef WCONTINUED
477	# define WCONTINUED 0	604	# define WCONTINUED 0
478	#endif	605	#endif
479		606
480	static void	607	static void
481	childcb (struct ev_signal *sw, int revents)	608	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
482	{	609	{
483	struct ev_child *w;	610	struct ev_child *w;
		611
		612	for (w = (struct ev_child )childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child )((WL)w)->next)
		613	if (w->pid == pid \|\| !w->pid)
		614	{
		615	ev_priority (w) = ev_priority (sw); /* need to do it now */
		616	w->rpid = pid;
		617	w->rstatus = status;
		618	event (EV_A_ (W)w, EV_CHILD);
		619	}
		620	}
		621
		622	static void
		623	childcb (EV_P_ struct ev_signal *sw, int revents)
		624	{
484	int pid, status;	625	int pid, status;
485		626
486	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)	627	if (0 < (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)))
487	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)	628	{
488	if (w->pid == pid \|\| !w->pid)	629	/* make sure we are called again until all childs have been reaped */
489	{	630	event (EV_A_ (W)sw, EV_SIGNAL);
490	w->status = status;	631
491	event ((W)w, EV_CHILD);	632	child_reap (EV_A_ sw, pid, pid, status);
492	}	633	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
		634	}
493	}	635	}
494		636
495	#endif	637	#endif
496		638
497	/*****************************************************************************/	639	/*****************************************************************************/
…		…
519	ev_version_minor (void)	661	ev_version_minor (void)
520	{	662	{
521	return EV_VERSION_MINOR;	663	return EV_VERSION_MINOR;
522	}	664	}
523		665
524	/* return true if we are running with elevated privileges and ignore env variables */	666	/* return true if we are running with elevated privileges and should ignore env variables */
525	static int	667	static int
526	enable_secure ()	668	enable_secure (void)
527	{	669	{
		670	#ifdef WIN32
		671	return 0;
		672	#else
528	return getuid () != geteuid ()	673	return getuid () != geteuid ()
529	\|\| getgid () != getegid ();	674	\|\| getgid () != getegid ();
		675	#endif
530	}	676	}
531		677
532	int ev_init (int methods)	678	int
		679	ev_method (EV_P)
533	{	680	{
		681	return method;
		682	}
		683
		684	static void
		685	loop_init (EV_P_ int methods)
		686	{
534	if (!ev_method)	687	if (!method)
535	{	688	{
536	#if EV_USE_MONOTONIC	689	#if EV_USE_MONOTONIC
537	{	690	{
538	struct timespec ts;	691	struct timespec ts;
539	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	692	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
540	have_monotonic = 1;	693	have_monotonic = 1;
541	}	694	}
542	#endif	695	#endif
543		696
544	ev_now = ev_time ();	697	rt_now = ev_time ();
545	now = get_clock ();	698	mn_now = get_clock ();
546	now_floor = now;	699	now_floor = mn_now;
547	diff = ev_now - now;	700	rtmn_diff = rt_now - mn_now;
548
549	if (pipe (sigpipe))
550	return 0;
551		701
552	if (methods == EVMETHOD_AUTO)	702	if (methods == EVMETHOD_AUTO)
553	if (!enable_secure () && getenv ("LIBEV_METHODS"))	703	if (!enable_secure () && getenv ("LIBEV_METHODS"))
554	methods = atoi (getenv ("LIBEV_METHODS"));	704	methods = atoi (getenv ("LIBEV_METHODS"));
555	else	705	else
556	methods = EVMETHOD_ANY;	706	methods = EVMETHOD_ANY;
557		707
558	ev_method = 0;	708	method = 0;
		709	#if EV_USE_WIN32
		710	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		711	#endif
559	#if EV_USE_KQUEUE	712	#if EV_USE_KQUEUE
560	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	713	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
561	#endif	714	#endif
562	#if EV_USE_EPOLL	715	#if EV_USE_EPOLL
563	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	716	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
564	#endif	717	#endif
565	#if EV_USE_POLL	718	#if EV_USE_POLL
566	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	719	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
567	#endif	720	#endif
568	#if EV_USE_SELECT	721	#if EV_USE_SELECT
569	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	722	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
570	#endif	723	#endif
571		724
		725	ev_watcher_init (&sigev, sigcb);
		726	ev_set_priority (&sigev, EV_MAXPRI);
		727	}
		728	}
		729
		730	void
		731	loop_destroy (EV_P)
		732	{
		733	int i;
		734
		735	#if EV_USE_WIN32
		736	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		737	#endif
		738	#if EV_USE_KQUEUE
		739	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		740	#endif
		741	#if EV_USE_EPOLL
		742	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		743	#endif
		744	#if EV_USE_POLL
		745	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		746	#endif
		747	#if EV_USE_SELECT
		748	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		749	#endif
		750
		751	for (i = NUMPRI; i--; )
		752	array_free (pending, [i]);
		753
		754	/* have to use the microsoft-never-gets-it-right macro */
		755	array_free_microshit (fdchange);
		756	array_free_microshit (timer);
		757	array_free_microshit (periodic);
		758	array_free_microshit (idle);
		759	array_free_microshit (prepare);
		760	array_free_microshit (check);
		761
		762	method = 0;
		763	}
		764
		765	static void
		766	loop_fork (EV_P)
		767	{
		768	#if EV_USE_EPOLL
		769	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		770	#endif
		771	#if EV_USE_KQUEUE
		772	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		773	#endif
		774
		775	if (ev_is_active (&sigev))
		776	{
		777	/* default loop */
		778
		779	ev_ref (EV_A);
		780	ev_io_stop (EV_A_ &sigev);
		781	close (sigpipe [0]);
		782	close (sigpipe [1]);
		783
		784	while (pipe (sigpipe))
		785	syserr ("(libev) error creating pipe");
		786
		787	siginit (EV_A);
		788	}
		789
		790	postfork = 0;
		791	}
		792
		793	#if EV_MULTIPLICITY
		794	struct ev_loop *
		795	ev_loop_new (int methods)
		796	{
		797	struct ev_loop loop = (struct ev_loop )ev_malloc (sizeof (struct ev_loop));
		798
		799	memset (loop, 0, sizeof (struct ev_loop));
		800
		801	loop_init (EV_A_ methods);
		802
		803	if (ev_method (EV_A))
		804	return loop;
		805
		806	return 0;
		807	}
		808
		809	void
		810	ev_loop_destroy (EV_P)
		811	{
		812	loop_destroy (EV_A);
		813	ev_free (loop);
		814	}
		815
		816	void
		817	ev_loop_fork (EV_P)
		818	{
		819	postfork = 1;
		820	}
		821
		822	#endif
		823
		824	#if EV_MULTIPLICITY
		825	struct ev_loop default_loop_struct;
		826	static struct ev_loop *default_loop;
		827
		828	struct ev_loop *
		829	#else
		830	static int default_loop;
		831
		832	int
		833	#endif
		834	ev_default_loop (int methods)
		835	{
		836	if (sigpipe [0] == sigpipe [1])
		837	if (pipe (sigpipe))
		838	return 0;
		839
		840	if (!default_loop)
		841	{
		842	#if EV_MULTIPLICITY
		843	struct ev_loop *loop = default_loop = &default_loop_struct;
		844	#else
		845	default_loop = 1;
		846	#endif
		847
		848	loop_init (EV_A_ methods);
		849
572	if (ev_method)	850	if (ev_method (EV_A))
573	{	851	{
574	ev_watcher_init (&sigev, sigcb);
575	siginit ();	852	siginit (EV_A);
576		853
577	#ifndef WIN32	854	#ifndef WIN32
578	ev_signal_init (&childev, childcb, SIGCHLD);	855	ev_signal_init (&childev, childcb, SIGCHLD);
		856	ev_set_priority (&childev, EV_MAXPRI);
579	ev_signal_start (&childev);	857	ev_signal_start (EV_A_ &childev);
		858	ev_unref (EV_A); /* child watcher should not keep loop alive */
580	#endif	859	#endif
581	}	860	}
		861	else
		862	default_loop = 0;
582	}	863	}
583		864
584	return ev_method;	865	return default_loop;
		866	}
		867
		868	void
		869	ev_default_destroy (void)
		870	{
		871	#if EV_MULTIPLICITY
		872	struct ev_loop *loop = default_loop;
		873	#endif
		874
		875	#ifndef WIN32
		876	ev_ref (EV_A); /* child watcher */
		877	ev_signal_stop (EV_A_ &childev);
		878	#endif
		879
		880	ev_ref (EV_A); /* signal watcher */
		881	ev_io_stop (EV_A_ &sigev);
		882
		883	close (sigpipe [0]); sigpipe [0] = 0;
		884	close (sigpipe [1]); sigpipe [1] = 0;
		885
		886	loop_destroy (EV_A);
		887	}
		888
		889	void
		890	ev_default_fork (void)
		891	{
		892	#if EV_MULTIPLICITY
		893	struct ev_loop *loop = default_loop;
		894	#endif
		895
		896	if (method)
		897	postfork = 1;
585	}	898	}
586		899
587	/*****************************************************************************/	900	/*****************************************************************************/
588		901
589	void
590	ev_fork_prepare (void)
591	{
592	/* nop */
593	}
594
595	void
596	ev_fork_parent (void)
597	{
598	/* nop */
599	}
600
601	void
602	ev_fork_child (void)
603	{
604	#if EV_USE_EPOLL
605	if (ev_method == EVMETHOD_EPOLL)
606	epoll_postfork_child ();
607	#endif
608
609	ev_io_stop (&sigev);
610	close (sigpipe [0]);
611	close (sigpipe [1]);
612	pipe (sigpipe);
613	siginit ();
614	}
615
616	/*****************************************************************************/
617
618	static void	902	static void
619	call_pending (void)	903	call_pending (EV_P)
620	{	904	{
621	int pri;	905	int pri;
622		906
623	for (pri = NUMPRI; pri--; )	907	for (pri = NUMPRI; pri--; )
624	while (pendingcnt [pri])	908	while (pendingcnt [pri])
…		…
626	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	910	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
627		911
628	if (p->w)	912	if (p->w)
629	{	913	{
630	p->w->pending = 0;	914	p->w->pending = 0;
631	p->w->cb (p->w, p->events);	915	p->w->cb (EV_A_ p->w, p->events);
632	}	916	}
633	}	917	}
634	}	918	}
635		919
636	static void	920	static void
637	timers_reify (void)	921	timers_reify (EV_P)
638	{	922	{
639	while (timercnt && timers [0]->at <= now)	923	while (timercnt && ((WT)timers [0])->at <= mn_now)
640	{	924	{
641	struct ev_timer *w = timers [0];	925	struct ev_timer *w = timers [0];
		926
		927	assert (("inactive timer on timer heap detected", ev_is_active (w)));
642		928
643	/* first reschedule or stop timer */	929	/* first reschedule or stop timer */
644	if (w->repeat)	930	if (w->repeat)
645	{	931	{
646	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	932	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
647	w->at = now + w->repeat;	933	((WT)w)->at = mn_now + w->repeat;
648	downheap ((WT *)timers, timercnt, 0);	934	downheap ((WT *)timers, timercnt, 0);
649	}	935	}
650	else	936	else
651	ev_timer_stop (w); /* nonrepeating: stop timer */	937	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
652		938
653	event ((W)w, EV_TIMEOUT);	939	event (EV_A_ (W)w, EV_TIMEOUT);
654	}	940	}
655	}	941	}
656		942
657	static void	943	static void
658	periodics_reify (void)	944	periodics_reify (EV_P)
659	{	945	{
660	while (periodiccnt && periodics [0]->at <= ev_now)	946	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
661	{	947	{
662	struct ev_periodic *w = periodics [0];	948	struct ev_periodic *w = periodics [0];
		949
		950	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
663		951
664	/* first reschedule or stop timer */	952	/* first reschedule or stop timer */
665	if (w->interval)	953	if (w->interval)
666	{	954	{
667	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	955	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
668	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	956	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
669	downheap ((WT *)periodics, periodiccnt, 0);	957	downheap ((WT *)periodics, periodiccnt, 0);
670	}	958	}
671	else	959	else
672	ev_periodic_stop (w); /* nonrepeating: stop timer */	960	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
673		961
674	event ((W)w, EV_PERIODIC);	962	event (EV_A_ (W)w, EV_PERIODIC);
675	}	963	}
676	}	964	}
677		965
678	static void	966	static void
679	periodics_reschedule (ev_tstamp diff)	967	periodics_reschedule (EV_P)
680	{	968	{
681	int i;	969	int i;
682		970
683	/* adjust periodics after time jump */	971	/* adjust periodics after time jump */
684	for (i = 0; i < periodiccnt; ++i)	972	for (i = 0; i < periodiccnt; ++i)
685	{	973	{
686	struct ev_periodic *w = periodics [i];	974	struct ev_periodic *w = periodics [i];
687		975
688	if (w->interval)	976	if (w->interval)
689	{	977	{
690	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	978	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
691		979
692	if (fabs (diff) >= 1e-4)	980	if (fabs (diff) >= 1e-4)
693	{	981	{
694	ev_periodic_stop (w);	982	ev_periodic_stop (EV_A_ w);
695	ev_periodic_start (w);	983	ev_periodic_start (EV_A_ w);
696		984
697	i = 0; /* restart loop, inefficient, but time jumps should be rare */	985	i = 0; /* restart loop, inefficient, but time jumps should be rare */
698	}	986	}
699	}	987	}
700	}	988	}
701	}	989	}
702		990
703	static int	991	inline int
704	time_update_monotonic (void)	992	time_update_monotonic (EV_P)
705	{	993	{
706	now = get_clock ();	994	mn_now = get_clock ();
707		995
708	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	996	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
709	{	997	{
710	ev_now = now + diff;	998	rt_now = rtmn_diff + mn_now;
711	return 0;	999	return 0;
712	}	1000	}
713	else	1001	else
714	{	1002	{
715	now_floor = now;	1003	now_floor = mn_now;
716	ev_now = ev_time ();	1004	rt_now = ev_time ();
717	return 1;	1005	return 1;
718	}	1006	}
719	}	1007	}
720		1008
721	static void	1009	static void
722	time_update (void)	1010	time_update (EV_P)
723	{	1011	{
724	int i;	1012	int i;
725		1013
726	#if EV_USE_MONOTONIC	1014	#if EV_USE_MONOTONIC
727	if (expect_true (have_monotonic))	1015	if (expect_true (have_monotonic))
728	{	1016	{
729	if (time_update_monotonic ())	1017	if (time_update_monotonic (EV_A))
730	{	1018	{
731	ev_tstamp odiff = diff;	1019	ev_tstamp odiff = rtmn_diff;
732		1020
733	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1021	for (i = 4; --i; ) /* loop a few times, before making important decisions */
734	{	1022	{
735	diff = ev_now - now;	1023	rtmn_diff = rt_now - mn_now;
736		1024
737	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1025	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
738	return; /* all is well */	1026	return; /* all is well */
739		1027
740	ev_now = ev_time ();	1028	rt_now = ev_time ();
741	now = get_clock ();	1029	mn_now = get_clock ();
742	now_floor = now;	1030	now_floor = mn_now;
743	}	1031	}
744		1032
745	periodics_reschedule (diff - odiff);	1033	periodics_reschedule (EV_A);
746	/* no timer adjustment, as the monotonic clock doesn't jump */	1034	/* no timer adjustment, as the monotonic clock doesn't jump */
		1035	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
747	}	1036	}
748	}	1037	}
749	else	1038	else
750	#endif	1039	#endif
751	{	1040	{
752	ev_now = ev_time ();	1041	rt_now = ev_time ();
753		1042
754	if (expect_false (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1043	if (expect_false (mn_now > rt_now \|\| mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
755	{	1044	{
756	periodics_reschedule (ev_now - now);	1045	periodics_reschedule (EV_A);
757		1046
758	/* adjust timers. this is easy, as the offset is the same for all */	1047	/* adjust timers. this is easy, as the offset is the same for all */
759	for (i = 0; i < timercnt; ++i)	1048	for (i = 0; i < timercnt; ++i)
760	timers [i]->at += diff;	1049	((WT)timers [i])->at += rt_now - mn_now;
761	}	1050	}
762		1051
763	now = ev_now;	1052	mn_now = rt_now;
764	}	1053	}
765	}	1054	}
766		1055
767	int ev_loop_done;	1056	void
		1057	ev_ref (EV_P)
		1058	{
		1059	++activecnt;
		1060	}
768		1061
		1062	void
		1063	ev_unref (EV_P)
		1064	{
		1065	--activecnt;
		1066	}
		1067
		1068	static int loop_done;
		1069
		1070	void
769	void ev_loop (int flags)	1071	ev_loop (EV_P_ int flags)
770	{	1072	{
771	double block;	1073	double block;
772	ev_loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;	1074	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK) ? 1 : 0;
773		1075
774	do	1076	do
775	{	1077	{
776	/* queue check watchers (and execute them) */	1078	/* queue check watchers (and execute them) */
777	if (expect_false (preparecnt))	1079	if (expect_false (preparecnt))
778	{	1080	{
779	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1081	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
780	call_pending ();	1082	call_pending (EV_A);
781	}	1083	}
782		1084
		1085	/* we might have forked, so reify kernel state if necessary */
		1086	if (expect_false (postfork))
		1087	loop_fork (EV_A);
		1088
783	/* update fd-related kernel structures */	1089	/* update fd-related kernel structures */
784	fd_reify ();	1090	fd_reify (EV_A);
785		1091
786	/* calculate blocking time */	1092	/* calculate blocking time */
787		1093
788	/* we only need this for !monotonic clockor timers, but as we basically	1094	/* we only need this for !monotonic clockor timers, but as we basically
789	always have timers, we just calculate it always */	1095	always have timers, we just calculate it always */
790	#if EV_USE_MONOTONIC	1096	#if EV_USE_MONOTONIC
791	if (expect_true (have_monotonic))	1097	if (expect_true (have_monotonic))
792	time_update_monotonic ();	1098	time_update_monotonic (EV_A);
793	else	1099	else
794	#endif	1100	#endif
795	{	1101	{
796	ev_now = ev_time ();	1102	rt_now = ev_time ();
797	now = ev_now;	1103	mn_now = rt_now;
798	}	1104	}
799		1105
800	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)	1106	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
801	block = 0.;	1107	block = 0.;
802	else	1108	else
803	{	1109	{
804	block = MAX_BLOCKTIME;	1110	block = MAX_BLOCKTIME;
805		1111
806	if (timercnt)	1112	if (timercnt)
807	{	1113	{
808	ev_tstamp to = timers [0]->at - now + method_fudge;	1114	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
809	if (block > to) block = to;	1115	if (block > to) block = to;
810	}	1116	}
811		1117
812	if (periodiccnt)	1118	if (periodiccnt)
813	{	1119	{
814	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1120	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
815	if (block > to) block = to;	1121	if (block > to) block = to;
816	}	1122	}
817		1123
818	if (block < 0.) block = 0.;	1124	if (block < 0.) block = 0.;
819	}	1125	}
820		1126
821	method_poll (block);	1127	method_poll (EV_A_ block);
822		1128
823	/* update ev_now, do magic */	1129	/* update rt_now, do magic */
824	time_update ();	1130	time_update (EV_A);
825		1131
826	/* queue pending timers and reschedule them */	1132	/* queue pending timers and reschedule them */
827	timers_reify (); /* relative timers called last */	1133	timers_reify (EV_A); /* relative timers called last */
828	periodics_reify (); /* absolute timers called first */	1134	periodics_reify (EV_A); /* absolute timers called first */
829		1135
830	/* queue idle watchers unless io or timers are pending */	1136	/* queue idle watchers unless io or timers are pending */
831	if (!pendingcnt)	1137	if (!pendingcnt)
832	queue_events ((W *)idles, idlecnt, EV_IDLE);	1138	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
833		1139
834	/* queue check watchers, to be executed first */	1140	/* queue check watchers, to be executed first */
835	if (checkcnt)	1141	if (checkcnt)
836	queue_events ((W *)checks, checkcnt, EV_CHECK);	1142	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
837		1143
838	call_pending ();	1144	call_pending (EV_A);
839	}	1145	}
840	while (!ev_loop_done);	1146	while (activecnt && !loop_done);
841		1147
842	if (ev_loop_done != 2)	1148	if (loop_done != 2)
843	ev_loop_done = 0;	1149	loop_done = 0;
		1150	}
		1151
		1152	void
		1153	ev_unloop (EV_P_ int how)
		1154	{
		1155	loop_done = how;
844	}	1156	}
845		1157
846	/*****************************************************************************/	1158	/*****************************************************************************/
847		1159
848	static void	1160	inline void
849	wlist_add (WL *head, WL elem)	1161	wlist_add (WL *head, WL elem)
850	{	1162	{
851	elem->next = *head;	1163	elem->next = *head;
852	*head = elem;	1164	*head = elem;
853	}	1165	}
854		1166
855	static void	1167	inline void
856	wlist_del (WL *head, WL elem)	1168	wlist_del (WL *head, WL elem)
857	{	1169	{
858	while (*head)	1170	while (*head)
859	{	1171	{
860	if (*head == elem)	1172	if (*head == elem)
…		…
865		1177
866	head = &(*head)->next;	1178	head = &(*head)->next;
867	}	1179	}
868	}	1180	}
869		1181
870	static void	1182	inline void
871	ev_clear_pending (W w)	1183	ev_clear_pending (EV_P_ W w)
872	{	1184	{
873	if (w->pending)	1185	if (w->pending)
874	{	1186	{
875	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1187	pendings [ABSPRI (w)][w->pending - 1].w = 0;
876	w->pending = 0;	1188	w->pending = 0;
877	}	1189	}
878	}	1190	}
879		1191
880	static void	1192	inline void
881	ev_start (W w, int active)	1193	ev_start (EV_P_ W w, int active)
882	{	1194	{
883	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1195	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
884	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1196	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
885		1197
886	w->active = active;	1198	w->active = active;
		1199	ev_ref (EV_A);
887	}	1200	}
888		1201
889	static void	1202	inline void
890	ev_stop (W w)	1203	ev_stop (EV_P_ W w)
891	{	1204	{
		1205	ev_unref (EV_A);
892	w->active = 0;	1206	w->active = 0;
893	}	1207	}
894		1208
895	/*****************************************************************************/	1209	/*****************************************************************************/
896		1210
897	void	1211	void
898	ev_io_start (struct ev_io *w)	1212	ev_io_start (EV_P_ struct ev_io *w)
899	{	1213	{
900	int fd = w->fd;	1214	int fd = w->fd;
901		1215
902	if (ev_is_active (w))	1216	if (ev_is_active (w))
903	return;	1217	return;
904		1218
905	assert (("ev_io_start called with negative fd", fd >= 0));	1219	assert (("ev_io_start called with negative fd", fd >= 0));
906		1220
907	ev_start ((W)w, 1);	1221	ev_start (EV_A_ (W)w, 1);
908	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1222	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
909	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1223	wlist_add ((WL *)&anfds[fd].head, (WL)w);
910		1224
911	fd_change (fd);	1225	fd_change (EV_A_ fd);
912	}	1226	}
913		1227
914	void	1228	void
915	ev_io_stop (struct ev_io *w)	1229	ev_io_stop (EV_P_ struct ev_io *w)
916	{	1230	{
917	ev_clear_pending ((W)w);	1231	ev_clear_pending (EV_A_ (W)w);
918	if (!ev_is_active (w))	1232	if (!ev_is_active (w))
919	return;	1233	return;
920		1234
921	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1235	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
922	ev_stop ((W)w);	1236	ev_stop (EV_A_ (W)w);
923		1237
924	fd_change (w->fd);	1238	fd_change (EV_A_ w->fd);
925	}	1239	}
926		1240
927	void	1241	void
928	ev_timer_start (struct ev_timer *w)	1242	ev_timer_start (EV_P_ struct ev_timer *w)
929	{	1243	{
930	if (ev_is_active (w))	1244	if (ev_is_active (w))
931	return;	1245	return;
932		1246
933	w->at += now;	1247	((WT)w)->at += mn_now;
934		1248
935	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1249	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
936		1250
937	ev_start ((W)w, ++timercnt);	1251	ev_start (EV_A_ (W)w, ++timercnt);
938	array_needsize (timers, timermax, timercnt, );	1252	array_needsize (struct ev_timer *, timers, timermax, timercnt, (void));
939	timers [timercnt - 1] = w;	1253	timers [timercnt - 1] = w;
940	upheap ((WT *)timers, timercnt - 1);	1254	upheap ((WT *)timers, timercnt - 1);
941	}
942		1255
		1256	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1257	}
		1258
943	void	1259	void
944	ev_timer_stop (struct ev_timer *w)	1260	ev_timer_stop (EV_P_ struct ev_timer *w)
945	{	1261	{
946	ev_clear_pending ((W)w);	1262	ev_clear_pending (EV_A_ (W)w);
947	if (!ev_is_active (w))	1263	if (!ev_is_active (w))
948	return;	1264	return;
949		1265
		1266	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1267
950	if (w->active < timercnt--)	1268	if (((W)w)->active < timercnt--)
951	{	1269	{
952	timers [w->active - 1] = timers [timercnt];	1270	timers [((W)w)->active - 1] = timers [timercnt];
953	downheap ((WT *)timers, timercnt, w->active - 1);	1271	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
954	}	1272	}
955		1273
956	w->at = w->repeat;	1274	((WT)w)->at = w->repeat;
957		1275
958	ev_stop ((W)w);	1276	ev_stop (EV_A_ (W)w);
959	}	1277	}
960		1278
961	void	1279	void
962	ev_timer_again (struct ev_timer *w)	1280	ev_timer_again (EV_P_ struct ev_timer *w)
963	{	1281	{
964	if (ev_is_active (w))	1282	if (ev_is_active (w))
965	{	1283	{
966	if (w->repeat)	1284	if (w->repeat)
967	{	1285	{
968	w->at = now + w->repeat;	1286	((WT)w)->at = mn_now + w->repeat;
969	downheap ((WT *)timers, timercnt, w->active - 1);	1287	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
970	}	1288	}
971	else	1289	else
972	ev_timer_stop (w);	1290	ev_timer_stop (EV_A_ w);
973	}	1291	}
974	else if (w->repeat)	1292	else if (w->repeat)
975	ev_timer_start (w);	1293	ev_timer_start (EV_A_ w);
976	}	1294	}
977		1295
978	void	1296	void
979	ev_periodic_start (struct ev_periodic *w)	1297	ev_periodic_start (EV_P_ struct ev_periodic *w)
980	{	1298	{
981	if (ev_is_active (w))	1299	if (ev_is_active (w))
982	return;	1300	return;
983		1301
984	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1302	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
985		1303
986	/* this formula differs from the one in periodic_reify because we do not always round up */	1304	/* this formula differs from the one in periodic_reify because we do not always round up */
987	if (w->interval)	1305	if (w->interval)
988	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1306	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
989		1307
990	ev_start ((W)w, ++periodiccnt);	1308	ev_start (EV_A_ (W)w, ++periodiccnt);
991	array_needsize (periodics, periodicmax, periodiccnt, );	1309	array_needsize (struct ev_periodic *, periodics, periodicmax, periodiccnt, (void));
992	periodics [periodiccnt - 1] = w;	1310	periodics [periodiccnt - 1] = w;
993	upheap ((WT *)periodics, periodiccnt - 1);	1311	upheap ((WT *)periodics, periodiccnt - 1);
994	}
995		1312
		1313	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1314	}
		1315
996	void	1316	void
997	ev_periodic_stop (struct ev_periodic *w)	1317	ev_periodic_stop (EV_P_ struct ev_periodic *w)
998	{	1318	{
999	ev_clear_pending ((W)w);	1319	ev_clear_pending (EV_A_ (W)w);
1000	if (!ev_is_active (w))	1320	if (!ev_is_active (w))
1001	return;	1321	return;
1002		1322
		1323	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1324
1003	if (w->active < periodiccnt--)	1325	if (((W)w)->active < periodiccnt--)
1004	{	1326	{
1005	periodics [w->active - 1] = periodics [periodiccnt];	1327	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1006	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1328	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1007	}	1329	}
1008		1330
1009	ev_stop ((W)w);	1331	ev_stop (EV_A_ (W)w);
1010	}	1332	}
1011		1333
1012	void	1334	void
1013	ev_signal_start (struct ev_signal *w)	1335	ev_idle_start (EV_P_ struct ev_idle *w)
1014	{	1336	{
1015	if (ev_is_active (w))	1337	if (ev_is_active (w))
1016	return;	1338	return;
1017		1339
		1340	ev_start (EV_A_ (W)w, ++idlecnt);
		1341	array_needsize (struct ev_idle *, idles, idlemax, idlecnt, (void));
		1342	idles [idlecnt - 1] = w;
		1343	}
		1344
		1345	void
		1346	ev_idle_stop (EV_P_ struct ev_idle *w)
		1347	{
		1348	ev_clear_pending (EV_A_ (W)w);
		1349	if (ev_is_active (w))
		1350	return;
		1351
		1352	idles [((W)w)->active - 1] = idles [--idlecnt];
		1353	ev_stop (EV_A_ (W)w);
		1354	}
		1355
		1356	void
		1357	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1358	{
		1359	if (ev_is_active (w))
		1360	return;
		1361
		1362	ev_start (EV_A_ (W)w, ++preparecnt);
		1363	array_needsize (struct ev_prepare *, prepares, preparemax, preparecnt, (void));
		1364	prepares [preparecnt - 1] = w;
		1365	}
		1366
		1367	void
		1368	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1369	{
		1370	ev_clear_pending (EV_A_ (W)w);
		1371	if (ev_is_active (w))
		1372	return;
		1373
		1374	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1375	ev_stop (EV_A_ (W)w);
		1376	}
		1377
		1378	void
		1379	ev_check_start (EV_P_ struct ev_check *w)
		1380	{
		1381	if (ev_is_active (w))
		1382	return;
		1383
		1384	ev_start (EV_A_ (W)w, ++checkcnt);
		1385	array_needsize (struct ev_check *, checks, checkmax, checkcnt, (void));
		1386	checks [checkcnt - 1] = w;
		1387	}
		1388
		1389	void
		1390	ev_check_stop (EV_P_ struct ev_check *w)
		1391	{
		1392	ev_clear_pending (EV_A_ (W)w);
		1393	if (ev_is_active (w))
		1394	return;
		1395
		1396	checks [((W)w)->active - 1] = checks [--checkcnt];
		1397	ev_stop (EV_A_ (W)w);
		1398	}
		1399
		1400	#ifndef SA_RESTART
		1401	# define SA_RESTART 0
		1402	#endif
		1403
		1404	void
		1405	ev_signal_start (EV_P_ struct ev_signal *w)
		1406	{
		1407	#if EV_MULTIPLICITY
		1408	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1409	#endif
		1410	if (ev_is_active (w))
		1411	return;
		1412
1018	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1413	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1019		1414
1020	ev_start ((W)w, 1);	1415	ev_start (EV_A_ (W)w, 1);
1021	array_needsize (signals, signalmax, w->signum, signals_init);	1416	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1022	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1417	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1023		1418
1024	if (!w->next)	1419	if (!((WL)w)->next)
1025	{	1420	{
		1421	#if WIN32
		1422	signal (w->signum, sighandler);
		1423	#else
1026	struct sigaction sa;	1424	struct sigaction sa;
1027	sa.sa_handler = sighandler;	1425	sa.sa_handler = sighandler;
1028	sigfillset (&sa.sa_mask);	1426	sigfillset (&sa.sa_mask);
1029	sa.sa_flags = 0;	1427	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1030	sigaction (w->signum, &sa, 0);	1428	sigaction (w->signum, &sa, 0);
		1429	#endif
1031	}	1430	}
1032	}	1431	}
1033		1432
1034	void	1433	void
1035	ev_signal_stop (struct ev_signal *w)	1434	ev_signal_stop (EV_P_ struct ev_signal *w)
1036	{	1435	{
1037	ev_clear_pending ((W)w);	1436	ev_clear_pending (EV_A_ (W)w);
1038	if (!ev_is_active (w))	1437	if (!ev_is_active (w))
1039	return;	1438	return;
1040		1439
1041	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1440	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1042	ev_stop ((W)w);	1441	ev_stop (EV_A_ (W)w);
1043		1442
1044	if (!signals [w->signum - 1].head)	1443	if (!signals [w->signum - 1].head)
1045	signal (w->signum, SIG_DFL);	1444	signal (w->signum, SIG_DFL);
1046	}	1445	}
1047		1446
1048	void	1447	void
1049	ev_idle_start (struct ev_idle *w)	1448	ev_child_start (EV_P_ struct ev_child *w)
1050	{	1449	{
		1450	#if EV_MULTIPLICITY
		1451	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1452	#endif
1051	if (ev_is_active (w))	1453	if (ev_is_active (w))
1052	return;	1454	return;
1053		1455
1054	ev_start ((W)w, ++idlecnt);	1456	ev_start (EV_A_ (W)w, 1);
1055	array_needsize (idles, idlemax, idlecnt, );	1457	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1056	idles [idlecnt - 1] = w;
1057	}	1458	}
1058		1459
1059	void	1460	void
1060	ev_idle_stop (struct ev_idle *w)	1461	ev_child_stop (EV_P_ struct ev_child *w)
1061	{	1462	{
1062	ev_clear_pending ((W)w);	1463	ev_clear_pending (EV_A_ (W)w);
1063	if (ev_is_active (w))	1464	if (ev_is_active (w))
1064	return;	1465	return;
1065		1466
1066	idles [w->active - 1] = idles [--idlecnt];
1067	ev_stop ((W)w);
1068	}
1069
1070	void
1071	ev_prepare_start (struct ev_prepare *w)
1072	{
1073	if (ev_is_active (w))
1074	return;
1075
1076	ev_start ((W)w, ++preparecnt);
1077	array_needsize (prepares, preparemax, preparecnt, );
1078	prepares [preparecnt - 1] = w;
1079	}
1080
1081	void
1082	ev_prepare_stop (struct ev_prepare *w)
1083	{
1084	ev_clear_pending ((W)w);
1085	if (ev_is_active (w))
1086	return;
1087
1088	prepares [w->active - 1] = prepares [--preparecnt];
1089	ev_stop ((W)w);
1090	}
1091
1092	void
1093	ev_check_start (struct ev_check *w)
1094	{
1095	if (ev_is_active (w))
1096	return;
1097
1098	ev_start ((W)w, ++checkcnt);
1099	array_needsize (checks, checkmax, checkcnt, );
1100	checks [checkcnt - 1] = w;
1101	}
1102
1103	void
1104	ev_check_stop (struct ev_check *w)
1105	{
1106	ev_clear_pending ((W)w);
1107	if (ev_is_active (w))
1108	return;
1109
1110	checks [w->active - 1] = checks [--checkcnt];
1111	ev_stop ((W)w);
1112	}
1113
1114	void
1115	ev_child_start (struct ev_child *w)
1116	{
1117	if (ev_is_active (w))
1118	return;
1119
1120	ev_start ((W)w, 1);
1121	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1122	}
1123
1124	void
1125	ev_child_stop (struct ev_child *w)
1126	{
1127	ev_clear_pending ((W)w);
1128	if (ev_is_active (w))
1129	return;
1130
1131	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1467	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1132	ev_stop ((W)w);	1468	ev_stop (EV_A_ (W)w);
1133	}	1469	}
1134		1470
1135	/*****************************************************************************/	1471	/*****************************************************************************/
1136		1472
1137	struct ev_once	1473	struct ev_once
…		…
1141	void (cb)(int revents, void arg);	1477	void (cb)(int revents, void arg);
1142	void *arg;	1478	void *arg;
1143	};	1479	};
1144		1480
1145	static void	1481	static void
1146	once_cb (struct ev_once *once, int revents)	1482	once_cb (EV_P_ struct ev_once *once, int revents)
1147	{	1483	{
1148	void (cb)(int revents, void arg) = once->cb;	1484	void (cb)(int revents, void arg) = once->cb;
1149	void *arg = once->arg;	1485	void *arg = once->arg;
1150		1486
1151	ev_io_stop (&once->io);	1487	ev_io_stop (EV_A_ &once->io);
1152	ev_timer_stop (&once->to);	1488	ev_timer_stop (EV_A_ &once->to);
1153	free (once);	1489	ev_free (once);
1154		1490
1155	cb (revents, arg);	1491	cb (revents, arg);
1156	}	1492	}
1157		1493
1158	static void	1494	static void
1159	once_cb_io (struct ev_io *w, int revents)	1495	once_cb_io (EV_P_ struct ev_io *w, int revents)
1160	{	1496	{
1161	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);	1497	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
1162	}	1498	}
1163		1499
1164	static void	1500	static void
1165	once_cb_to (struct ev_timer *w, int revents)	1501	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1166	{	1502	{
1167	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);	1503	once_cb (EV_A_ (struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
1168	}	1504	}
1169		1505
1170	void	1506	void
1171	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)	1507	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
1172	{	1508	{
1173	struct ev_once *once = malloc (sizeof (struct ev_once));	1509	struct ev_once once = (struct ev_once )ev_malloc (sizeof (struct ev_once));
1174		1510
1175	if (!once)	1511	if (!once)
1176	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);	1512	cb (EV_ERROR \| EV_READ \| EV_WRITE \| EV_TIMEOUT, arg);
1177	else	1513	else
1178	{	1514	{
…		…
1181		1517
1182	ev_watcher_init (&once->io, once_cb_io);	1518	ev_watcher_init (&once->io, once_cb_io);
1183	if (fd >= 0)	1519	if (fd >= 0)
1184	{	1520	{
1185	ev_io_set (&once->io, fd, events);	1521	ev_io_set (&once->io, fd, events);
1186	ev_io_start (&once->io);	1522	ev_io_start (EV_A_ &once->io);
1187	}	1523	}
1188		1524
1189	ev_watcher_init (&once->to, once_cb_to);	1525	ev_watcher_init (&once->to, once_cb_to);
1190	if (timeout >= 0.)	1526	if (timeout >= 0.)
1191	{	1527	{
1192	ev_timer_set (&once->to, timeout, 0.);	1528	ev_timer_set (&once->to, timeout, 0.);
1193	ev_timer_start (&once->to);	1529	ev_timer_start (EV_A_ &once->to);
1194	}	1530	}
1195	}	1531	}
1196	}	1532	}
1197		1533
1198	/*****************************************************************************/
1199
1200	#if 0
1201
1202	struct ev_io wio;
1203
1204	static void
1205	sin_cb (struct ev_io *w, int revents)
1206	{
1207	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1208	}
1209
1210	static void
1211	ocb (struct ev_timer *w, int revents)
1212	{
1213	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1214	ev_timer_stop (w);
1215	ev_timer_start (w);
1216	}
1217
1218	static void
1219	scb (struct ev_signal *w, int revents)
1220	{
1221	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1222	ev_io_stop (&wio);
1223	ev_io_start (&wio);
1224	}
1225
1226	static void
1227	gcb (struct ev_signal *w, int revents)
1228	{
1229	fprintf (stderr, "generic %x\n", revents);
1230
1231	}
1232
1233	int main (void)
1234	{
1235	ev_init (0);
1236
1237	ev_io_init (&wio, sin_cb, 0, EV_READ);
1238	ev_io_start (&wio);
1239
1240	struct ev_timer t[10000];
1241
1242	#if 0
1243	int i;
1244	for (i = 0; i < 10000; ++i)
1245	{
1246	struct ev_timer *w = t + i;
1247	ev_watcher_init (w, ocb, i);
1248	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1249	ev_timer_start (w);
1250	if (drand48 () < 0.5)
1251	ev_timer_stop (w);
1252	}
1253	#endif
1254
1255	struct ev_timer t1;
1256	ev_timer_init (&t1, ocb, 5, 10);
1257	ev_timer_start (&t1);
1258
1259	struct ev_signal sig;
1260	ev_signal_init (&sig, scb, SIGQUIT);
1261	ev_signal_start (&sig);
1262
1263	struct ev_check cw;
1264	ev_check_init (&cw, gcb);
1265	ev_check_start (&cw);
1266
1267	struct ev_idle iw;
1268	ev_idle_init (&iw, gcb);
1269	ev_idle_start (&iw);
1270
1271	ev_loop (0);
1272
1273	return 0;
1274	}
1275
1276	#endif
1277
1278
1279
1280

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing libev/ev.c (file contents): Revision 1.45 by root, Sat Nov 3 09:19:58 2007 UTC vs. Revision 1.75 by root, Tue Nov 6 19:29:20 2007 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.45 by root, Sat Nov 3 09:19:58 2007 UTC vs.
Revision 1.75 by root, Tue Nov 6 19:29:20 2007 UTC