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Comparing libev/ev.c (file contents):
Revision 1.50 by root, Sat Nov 3 19:41:55 2007 UTC vs.
Revision 1.71 by root, Tue Nov 6 13:17:55 2007 UTC

…		…
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE	28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.	29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	30	*/
31	#ifndef EV_STANDALONE	31	#ifndef EV_STANDALONE
32	# include "config.h"	32	# include "config.h"
		33
		34	# if HAVE_CLOCK_GETTIME
		35	# define EV_USE_MONOTONIC 1
		36	# define EV_USE_REALTIME 1
		37	# endif
		38
		39	# if HAVE_SELECT && HAVE_SYS_SELECT_H
		40	# define EV_USE_SELECT 1
		41	# endif
		42
		43	# if HAVE_POLL && HAVE_POLL_H
		44	# define EV_USE_POLL 1
		45	# endif
		46
		47	# if HAVE_EPOLL && HAVE_EPOLL_CTL && HAVE_SYS_EPOLL_H
		48	# define EV_USE_EPOLL 1
		49	# endif
		50
		51	# if HAVE_KQUEUE && HAVE_WORKING_KQUEUE && HAVE_SYS_EVENT_H && HAVE_SYS_QUEUE_H
		52	# define EV_USE_KQUEUE 1
		53	# endif
		54
33	#endif	55	#endif
34		56
35	#include <math.h>	57	#include <math.h>
36	#include <stdlib.h>	58	#include <stdlib.h>
37	#include <unistd.h>
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	#ifndef PERL
		70	# include <signal.h>
		71	#endif
		72
47	#ifndef WIN32	73	#ifndef WIN32
		74	# include <unistd.h>
		75	# include <sys/time.h>
48	# include <sys/wait.h>	76	# include <sys/wait.h>
49	#endif	77	#endif
50	#include <sys/time.h>
51	#include <time.h>
52
53	/**/	78	/**/
54		79
55	#ifndef EV_USE_MONOTONIC	80	#ifndef EV_USE_MONOTONIC
56	# define EV_USE_MONOTONIC 1	81	# define EV_USE_MONOTONIC 1
57	#endif	82	#endif
…		…
68	# define EV_USE_EPOLL 0	93	# define EV_USE_EPOLL 0
69	#endif	94	#endif
70		95
71	#ifndef EV_USE_KQUEUE	96	#ifndef EV_USE_KQUEUE
72	# define EV_USE_KQUEUE 0	97	# define EV_USE_KQUEUE 0
		98	#endif
		99
		100	#ifndef EV_USE_WIN32
		101	# ifdef WIN32
		102	# define EV_USE_WIN32 0 /* it does not exist, use select */
		103	# undef EV_USE_SELECT
		104	# define EV_USE_SELECT 1
		105	# else
		106	# define EV_USE_WIN32 0
		107	# endif
73	#endif	108	#endif
74		109
75	#ifndef EV_USE_REALTIME	110	#ifndef EV_USE_REALTIME
76	# define EV_USE_REALTIME 1	111	# define EV_USE_REALTIME 1
77	#endif	112	#endif
…		…
113		148
114	typedef struct ev_watcher *W;	149	typedef struct ev_watcher *W;
115	typedef struct ev_watcher_list *WL;	150	typedef struct ev_watcher_list *WL;
116	typedef struct ev_watcher_time *WT;	151	typedef struct ev_watcher_time *WT;
117		152
118	static ev_tstamp now_floor, now, diff; /* monotonic clock */	153	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
119	ev_tstamp ev_now;
120	int ev_method;
121		154
122	static int have_monotonic; /* runtime */	155	#if WIN32
123		156	/* note: the comment below could not be substantiated, but what would I care */
124	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	157	/* MSDN says this is required to handle SIGFPE */
125	static void (*method_modify)(int fd, int oev, int nev);	158	volatile double SIGFPE_REQ = 0.0f;
126	static void (*method_poll)(ev_tstamp timeout);	159	#endif
127		160
128	/*****************************************************************************/	161	/*****************************************************************************/
129		162
130	ev_tstamp	163	static void (*syserr_cb)(const char *msg);
		164
		165	void ev_set_syserr_cb (void (*cb)(const char *msg))
		166	{
		167	syserr_cb = cb;
		168	}
		169
		170	static void
		171	syserr (const char *msg)
		172	{
		173	if (!msg)
		174	msg = "(libev) system error";
		175
		176	if (syserr_cb)
		177	syserr_cb (msg);
		178	else
		179	{
		180	perror (msg);
		181	abort ();
		182	}
		183	}
		184
		185	static void *(*alloc)(void *ptr, long size);
		186
		187	void ev_set_allocator (void *(*cb)(void *ptr, long size))
		188	{
		189	alloc = cb;
		190	}
		191
		192	static void *
		193	ev_realloc (void *ptr, long size)
		194	{
		195	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
		196
		197	if (!ptr && size)
		198	{
		199	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
		200	abort ();
		201	}
		202
		203	return ptr;
		204	}
		205
		206	#define ev_malloc(size) ev_realloc (0, (size))
		207	#define ev_free(ptr) ev_realloc ((ptr), 0)
		208
		209	/*****************************************************************************/
		210
		211	typedef struct
		212	{
		213	WL head;
		214	unsigned char events;
		215	unsigned char reify;
		216	} ANFD;
		217
		218	typedef struct
		219	{
		220	W w;
		221	int events;
		222	} ANPENDING;
		223
		224	#if EV_MULTIPLICITY
		225
		226	struct ev_loop
		227	{
		228	# define VAR(name,decl) decl;
		229	# include "ev_vars.h"
		230	};
		231	# undef VAR
		232	# include "ev_wrap.h"
		233
		234	#else
		235
		236	# define VAR(name,decl) static decl;
		237	# include "ev_vars.h"
		238	# undef VAR
		239
		240	#endif
		241
		242	/*****************************************************************************/
		243
		244	inline ev_tstamp
131	ev_time (void)	245	ev_time (void)
132	{	246	{
133	#if EV_USE_REALTIME	247	#if EV_USE_REALTIME
134	struct timespec ts;	248	struct timespec ts;
135	clock_gettime (CLOCK_REALTIME, &ts);	249	clock_gettime (CLOCK_REALTIME, &ts);
…		…
139	gettimeofday (&tv, 0);	253	gettimeofday (&tv, 0);
140	return tv.tv_sec + tv.tv_usec * 1e-6;	254	return tv.tv_sec + tv.tv_usec * 1e-6;
141	#endif	255	#endif
142	}	256	}
143		257
144	static ev_tstamp	258	inline ev_tstamp
145	get_clock (void)	259	get_clock (void)
146	{	260	{
147	#if EV_USE_MONOTONIC	261	#if EV_USE_MONOTONIC
148	if (expect_true (have_monotonic))	262	if (expect_true (have_monotonic))
149	{	263	{
…		…
154	#endif	268	#endif
155		269
156	return ev_time ();	270	return ev_time ();
157	}	271	}
158		272
		273	ev_tstamp
		274	ev_now (EV_P)
		275	{
		276	return rt_now;
		277	}
		278
159	#define array_roundsize(base,n) ((n) | 4 & ~3)	279	#define array_roundsize(base,n) ((n) | 4 & ~3)
160		280
161	#define array_needsize(base,cur,cnt,init) \	281	#define array_needsize(base,cur,cnt,init) \
162	if (expect_false ((cnt) > cur)) \	282	if (expect_false ((cnt) > cur)) \
163	{ \	283	{ \
164	int newcnt = cur; \	284	int newcnt = cur; \
165	do \	285	do \
166	{ \	286	{ \
167	newcnt = array_roundsize (base, newcnt << 1); \	287	newcnt = array_roundsize (base, newcnt << 1); \
168	} \	288	} \
169	while ((cnt) > newcnt); \	289	while ((cnt) > newcnt); \
170	\	290	\
171	base = realloc (base, sizeof (*base) * (newcnt)); \	291	base = ev_realloc (base, sizeof (*base) * (newcnt)); \
172	init (base + cur, newcnt - cur); \	292	init (base + cur, newcnt - cur); \
173	cur = newcnt; \	293	cur = newcnt; \
174	}	294	}
		295
		296	#define array_slim(stem) \
		297	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
		298	{ \
		299	stem ## max = array_roundsize (stem ## cnt >> 1); \
		300	base = ev_realloc (base, sizeof (*base) * (stem ## max)); \
		301	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
		302	}
		303
		304	/* microsoft's pseudo-c is quite far from C as the rest of the world and the standard knows it */
		305	/* bringing us everlasting joy in form of stupid extra macros that are not required in C */
		306	#define array_free_microshit(stem) \
		307	ev_free (stem ## s); stem ## cnt = stem ## max = 0;
		308
		309	#define array_free(stem, idx) \
		310	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
175		311
176	/*****************************************************************************/	312	/*****************************************************************************/
177
178	typedef struct
179	{
180	struct ev_watcher_list *head;
181	unsigned char events;
182	unsigned char reify;
183	} ANFD;
184
185	static ANFD *anfds;
186	static int anfdmax;
187		313
188	static void	314	static void
189	anfds_init (ANFD *base, int count)	315	anfds_init (ANFD *base, int count)
190	{	316	{
191	while (count--)	317	while (count--)
…		…
196		322
197	++base;	323	++base;
198	}	324	}
199	}	325	}
200		326
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	327	static void
211	event (W w, int events)	328	event (EV_P_ W w, int events)
212	{	329	{
213	if (w->pending)	330	if (w->pending)
214	{	331	{
215	pendings [ABSPRI (w)][w->pending - 1].events |= events;	332	pendings [ABSPRI (w)][w->pending - 1].events |= events;
216	return;	333	return;
217	}	334	}
218		335
219	w->pending = ++pendingcnt [ABSPRI (w)];	336	w->pending = ++pendingcnt [ABSPRI (w)];
220	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], );	337	array_needsize (pendings [ABSPRI (w)], pendingmax [ABSPRI (w)], pendingcnt [ABSPRI (w)], (void));
221	pendings [ABSPRI (w)][w->pending - 1].w = w;	338	pendings [ABSPRI (w)][w->pending - 1].w = w;
222	pendings [ABSPRI (w)][w->pending - 1].events = events;	339	pendings [ABSPRI (w)][w->pending - 1].events = events;
223	}	340	}
224		341
225	static void	342	static void
226	queue_events (W *events, int eventcnt, int type)	343	queue_events (EV_P_ W *events, int eventcnt, int type)
227	{	344	{
228	int i;	345	int i;
229		346
230	for (i = 0; i < eventcnt; ++i)	347	for (i = 0; i < eventcnt; ++i)
231	event (events [i], type);	348	event (EV_A_ events [i], type);
232	}	349	}
233		350
234	static void	351	static void
235	fd_event (int fd, int events)	352	fd_event (EV_P_ int fd, int events)
236	{	353	{
237	ANFD *anfd = anfds + fd;	354	ANFD *anfd = anfds + fd;
238	struct ev_io *w;	355	struct ev_io *w;
239		356
240	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	357	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
241	{	358	{
242	int ev = w->events & events;	359	int ev = w->events & events;
243		360
244	if (ev)	361	if (ev)
245	event ((W)w, ev);	362	event (EV_A_ (W)w, ev);
246	}	363	}
247	}	364	}
248		365
249	/*****************************************************************************/	366	/*****************************************************************************/
250		367
251	static int *fdchanges;
252	static int fdchangemax, fdchangecnt;
253
254	static void	368	static void
255	fd_reify (void)	369	fd_reify (EV_P)
256	{	370	{
257	int i;	371	int i;
258		372
259	for (i = 0; i < fdchangecnt; ++i)	373	for (i = 0; i < fdchangecnt; ++i)
260	{	374	{
…		…
267	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)	381	for (w = (struct ev_io *)anfd->head; w; w = (struct ev_io *)((WL)w)->next)
268	events |= w->events;	382	events |= w->events;
269		383
270	anfd->reify = 0;	384	anfd->reify = 0;
271		385
272	if (anfd->events != events)
273	{
274	method_modify (fd, anfd->events, events);	386	method_modify (EV_A_ fd, anfd->events, events);
275	anfd->events = events;	387	anfd->events = events;
276	}
277	}	388	}
278		389
279	fdchangecnt = 0;	390	fdchangecnt = 0;
280	}	391	}
281		392
282	static void	393	static void
283	fd_change (int fd)	394	fd_change (EV_P_ int fd)
284	{	395	{
285	if (anfds [fd].reify || fdchangecnt < 0)	396	if (anfds [fd].reify)
286	return;	397	return;
287		398
288	anfds [fd].reify = 1;	399	anfds [fd].reify = 1;
289		400
290	++fdchangecnt;	401	++fdchangecnt;
291	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	402	array_needsize (fdchanges, fdchangemax, fdchangecnt, (void));
292	fdchanges [fdchangecnt - 1] = fd;	403	fdchanges [fdchangecnt - 1] = fd;
293	}	404	}
294		405
295	static void	406	static void
296	fd_kill (int fd)	407	fd_kill (EV_P_ int fd)
297	{	408	{
298	struct ev_io *w;	409	struct ev_io *w;
299		410
300	while ((w = (struct ev_io *)anfds [fd].head))	411	while ((w = (struct ev_io *)anfds [fd].head))
301	{	412	{
302	ev_io_stop (w);	413	ev_io_stop (EV_A_ w);
303	event ((W)w, EV_ERROR | EV_READ | EV_WRITE);	414	event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
304	}	415	}
		416	}
		417
		418	static int
		419	fd_valid (int fd)
		420	{
		421	#ifdef WIN32
		422	return !!win32_get_osfhandle (fd);
		423	#else
		424	return fcntl (fd, F_GETFD) != -1;
		425	#endif
305	}	426	}
306		427
307	/* called on EBADF to verify fds */	428	/* called on EBADF to verify fds */
308	static void	429	static void
309	fd_ebadf (void)	430	fd_ebadf (EV_P)
310	{	431	{
311	int fd;	432	int fd;
312		433
313	for (fd = 0; fd < anfdmax; ++fd)	434	for (fd = 0; fd < anfdmax; ++fd)
314	if (anfds [fd].events)	435	if (anfds [fd].events)
315	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)	436	if (!fd_valid (fd) == -1 && errno == EBADF)
316	fd_kill (fd);	437	fd_kill (EV_A_ fd);
317	}	438	}
318		439
319	/* called on ENOMEM in select/poll to kill some fds and retry */	440	/* called on ENOMEM in select/poll to kill some fds and retry */
320	static void	441	static void
321	fd_enomem (void)	442	fd_enomem (EV_P)
322	{	443	{
323	int fd = anfdmax;	444	int fd;
324		445
325	while (fd--)	446	for (fd = anfdmax; fd--; )
326	if (anfds [fd].events)	447	if (anfds [fd].events)
327	{	448	{
328	close (fd);
329	fd_kill (fd);	449	fd_kill (EV_A_ fd);
330	return;	450	return;
331	}	451	}
332	}	452	}
333		453
		454	/* usually called after fork if method needs to re-arm all fds from scratch */
		455	static void
		456	fd_rearm_all (EV_P)
		457	{
		458	int fd;
		459
		460	/* this should be highly optimised to not do anything but set a flag */
		461	for (fd = 0; fd < anfdmax; ++fd)
		462	if (anfds [fd].events)
		463	{
		464	anfds [fd].events = 0;
		465	fd_change (EV_A_ fd);
		466	}
		467	}
		468
334	/*****************************************************************************/	469	/*****************************************************************************/
335		470
336	static struct ev_timer **timers;
337	static int timermax, timercnt;
338
339	static struct ev_periodic **periodics;
340	static int periodicmax, periodiccnt;
341
342	static void	471	static void
343	upheap (WT *timers, int k)	472	upheap (WT *heap, int k)
344	{	473	{
345	WT w = timers [k];	474	WT w = heap [k];
346		475
347	while (k && timers [k >> 1]->at > w->at)	476	while (k && heap [k >> 1]->at > w->at)
348	{	477	{
349	timers [k] = timers [k >> 1];	478	heap [k] = heap [k >> 1];
350	timers [k]->active = k + 1;	479	((W)heap [k])->active = k + 1;
351	k >>= 1;	480	k >>= 1;
352	}	481	}
353		482
354	timers [k] = w;	483	heap [k] = w;
355	timers [k]->active = k + 1;	484	((W)heap [k])->active = k + 1;
356		485
357	}	486	}
358		487
359	static void	488	static void
360	downheap (WT *timers, int N, int k)	489	downheap (WT *heap, int N, int k)
361	{	490	{
362	WT w = timers [k];	491	WT w = heap [k];
363		492
364	while (k < (N >> 1))	493	while (k < (N >> 1))
365	{	494	{
366	int j = k << 1;	495	int j = k << 1;
367		496
368	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)	497	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)
369	++j;	498	++j;
370		499
371	if (w->at <= timers [j]->at)	500	if (w->at <= heap [j]->at)
372	break;	501	break;
373		502
374	timers [k] = timers [j];	503	heap [k] = heap [j];
375	timers [k]->active = k + 1;	504	((W)heap [k])->active = k + 1;
376	k = j;	505	k = j;
377	}	506	}
378		507
379	timers [k] = w;	508	heap [k] = w;
380	timers [k]->active = k + 1;	509	((W)heap [k])->active = k + 1;
381	}	510	}
382		511
383	/*****************************************************************************/	512	/*****************************************************************************/
384		513
385	typedef struct	514	typedef struct
386	{	515	{
387	struct ev_watcher_list *head;	516	WL head;
388	sig_atomic_t volatile gotsig;	517	sig_atomic_t volatile gotsig;
389	} ANSIG;	518	} ANSIG;
390		519
391	static ANSIG *signals;	520	static ANSIG *signals;
392	static int signalmax;	521	static int signalmax;
…		…
408	}	537	}
409		538
410	static void	539	static void
411	sighandler (int signum)	540	sighandler (int signum)
412	{	541	{
		542	#if WIN32
		543	signal (signum, sighandler);
		544	#endif
		545
413	signals [signum - 1].gotsig = 1;	546	signals [signum - 1].gotsig = 1;
414		547
415	if (!gotsig)	548	if (!gotsig)
416	{	549	{
417	int old_errno = errno;	550	int old_errno = errno;
…		…
420	errno = old_errno;	553	errno = old_errno;
421	}	554	}
422	}	555	}
423		556
424	static void	557	static void
425	sigcb (struct ev_io *iow, int revents)	558	sigcb (EV_P_ struct ev_io *iow, int revents)
426	{	559	{
427	struct ev_watcher_list *w;	560	WL w;
428	int signum;	561	int signum;
429		562
430	read (sigpipe [0], &revents, 1);	563	read (sigpipe [0], &revents, 1);
431	gotsig = 0;	564	gotsig = 0;
432		565
…		…
434	if (signals [signum].gotsig)	567	if (signals [signum].gotsig)
435	{	568	{
436	signals [signum].gotsig = 0;	569	signals [signum].gotsig = 0;
437		570
438	for (w = signals [signum].head; w; w = w->next)	571	for (w = signals [signum].head; w; w = w->next)
439	event ((W)w, EV_SIGNAL);	572	event (EV_A_ (W)w, EV_SIGNAL);
440	}	573	}
441	}	574	}
442		575
443	static void	576	static void
444	siginit (void)	577	siginit (EV_P)
445	{	578	{
446	#ifndef WIN32	579	#ifndef WIN32
447	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);	580	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
448	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);	581	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
449		582
…		…
451	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);	584	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
452	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);	585	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
453	#endif	586	#endif
454		587
455	ev_io_set (&sigev, sigpipe [0], EV_READ);	588	ev_io_set (&sigev, sigpipe [0], EV_READ);
456	ev_io_start (&sigev);	589	ev_io_start (EV_A_ &sigev);
		590	ev_unref (EV_A); /* child watcher should not keep loop alive */
457	}	591	}
458		592
459	/*****************************************************************************/	593	/*****************************************************************************/
460		594
461	static struct ev_idle **idles;
462	static int idlemax, idlecnt;
463
464	static struct ev_prepare **prepares;
465	static int preparemax, preparecnt;
466
467	static struct ev_check **checks;
468	static int checkmax, checkcnt;
469
470	/*****************************************************************************/
471
472	static struct ev_child *childs [PID_HASHSIZE];	595	static struct ev_child *childs [PID_HASHSIZE];
		596
		597	#ifndef WIN32
		598
473	static struct ev_signal childev;	599	static struct ev_signal childev;
474
475	#ifndef WIN32
476		600
477	#ifndef WCONTINUED	601	#ifndef WCONTINUED
478	# define WCONTINUED 0	602	# define WCONTINUED 0
479	#endif	603	#endif
480		604
481	static void	605	static void
482	child_reap (struct ev_signal *sw, int chain, int pid, int status)	606	child_reap (EV_P_ struct ev_signal *sw, int chain, int pid, int status)
483	{	607	{
484	struct ev_child *w;	608	struct ev_child *w;
485		609
486	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)	610	for (w = (struct ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (struct ev_child *)((WL)w)->next)
487	if (w->pid == pid || !w->pid)	611	if (w->pid == pid || !w->pid)
488	{	612	{
489	w->priority = sw->priority; /* need to do it *now* */	613	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
490	w->rpid = pid;	614	w->rpid = pid;
491	w->rstatus = status;	615	w->rstatus = status;
492	event ((W)w, EV_CHILD);	616	event (EV_A_ (W)w, EV_CHILD);
493	}	617	}
494	}	618	}
495		619
496	static void	620	static void
497	childcb (struct ev_signal *sw, int revents)	621	childcb (EV_P_ struct ev_signal *sw, int revents)
498	{	622	{
499	int pid, status;	623	int pid, status;
500		624
501	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	625	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
502	{	626	{
503	/* make sure we are called again until all childs have been reaped */	627	/* make sure we are called again until all childs have been reaped */
504	event ((W)sw, EV_SIGNAL);	628	event (EV_A_ (W)sw, EV_SIGNAL);
505		629
506	child_reap (sw, pid, pid, status);	630	child_reap (EV_A_ sw, pid, pid, status);
507	child_reap (sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */	631	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but event catches that */
508	}	632	}
509	}	633	}
510		634
511	#endif	635	#endif
512		636
…		…
537	return EV_VERSION_MINOR;	661	return EV_VERSION_MINOR;
538	}	662	}
539		663
540	/* return true if we are running with elevated privileges and should ignore env variables */	664	/* return true if we are running with elevated privileges and should ignore env variables */
541	static int	665	static int
542	enable_secure ()	666	enable_secure (void)
543	{	667	{
544	#ifdef WIN32	668	#ifdef WIN32
545	return 0;	669	return 0;
546	#else	670	#else
547	return getuid () != geteuid ()	671	return getuid () != geteuid ()
548	|| getgid () != getegid ();	672	|| getgid () != getegid ();
549	#endif	673	#endif
550	}	674	}
551		675
552	int ev_init (int methods)	676	int
		677	ev_method (EV_P)
553	{	678	{
		679	return method;
		680	}
		681
		682	static void
		683	loop_init (EV_P_ int methods)
		684	{
554	if (!ev_method)	685	if (!method)
555	{	686	{
556	#if EV_USE_MONOTONIC	687	#if EV_USE_MONOTONIC
557	{	688	{
558	struct timespec ts;	689	struct timespec ts;
559	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	690	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
560	have_monotonic = 1;	691	have_monotonic = 1;
561	}	692	}
562	#endif	693	#endif
563		694
564	ev_now = ev_time ();	695	rt_now = ev_time ();
565	now = get_clock ();	696	mn_now = get_clock ();
566	now_floor = now;	697	now_floor = mn_now;
567	diff = ev_now - now;	698	rtmn_diff = rt_now - mn_now;
568
569	if (pipe (sigpipe))
570	return 0;
571		699
572	if (methods == EVMETHOD_AUTO)	700	if (methods == EVMETHOD_AUTO)
573	if (!enable_secure () && getenv ("LIBEV_METHODS"))	701	if (!enable_secure () && getenv ("LIBEV_METHODS"))
574	methods = atoi (getenv ("LIBEV_METHODS"));	702	methods = atoi (getenv ("LIBEV_METHODS"));
575	else	703	else
576	methods = EVMETHOD_ANY;	704	methods = EVMETHOD_ANY;
577		705
578	ev_method = 0;	706	method = 0;
		707	#if EV_USE_WIN32
		708	if (!method && (methods & EVMETHOD_WIN32 )) method = win32_init (EV_A_ methods);
		709	#endif
579	#if EV_USE_KQUEUE	710	#if EV_USE_KQUEUE
580	if (!ev_method && (methods & EVMETHOD_KQUEUE)) kqueue_init (methods);	711	if (!method && (methods & EVMETHOD_KQUEUE)) method = kqueue_init (EV_A_ methods);
581	#endif	712	#endif
582	#if EV_USE_EPOLL	713	#if EV_USE_EPOLL
583	if (!ev_method && (methods & EVMETHOD_EPOLL )) epoll_init (methods);	714	if (!method && (methods & EVMETHOD_EPOLL )) method = epoll_init (EV_A_ methods);
584	#endif	715	#endif
585	#if EV_USE_POLL	716	#if EV_USE_POLL
586	if (!ev_method && (methods & EVMETHOD_POLL )) poll_init (methods);	717	if (!method && (methods & EVMETHOD_POLL )) method = poll_init (EV_A_ methods);
587	#endif	718	#endif
588	#if EV_USE_SELECT	719	#if EV_USE_SELECT
589	if (!ev_method && (methods & EVMETHOD_SELECT)) select_init (methods);	720	if (!method && (methods & EVMETHOD_SELECT)) method = select_init (EV_A_ methods);
590	#endif	721	#endif
591		722
		723	ev_watcher_init (&sigev, sigcb);
		724	ev_set_priority (&sigev, EV_MAXPRI);
		725	}
		726	}
		727
		728	void
		729	loop_destroy (EV_P)
		730	{
		731	int i;
		732
		733	#if EV_USE_WIN32
		734	if (method == EVMETHOD_WIN32 ) win32_destroy (EV_A);
		735	#endif
		736	#if EV_USE_KQUEUE
		737	if (method == EVMETHOD_KQUEUE) kqueue_destroy (EV_A);
		738	#endif
		739	#if EV_USE_EPOLL
		740	if (method == EVMETHOD_EPOLL ) epoll_destroy (EV_A);
		741	#endif
		742	#if EV_USE_POLL
		743	if (method == EVMETHOD_POLL ) poll_destroy (EV_A);
		744	#endif
		745	#if EV_USE_SELECT
		746	if (method == EVMETHOD_SELECT) select_destroy (EV_A);
		747	#endif
		748
		749	for (i = NUMPRI; i--; )
		750	array_free (pending, [i]);
		751
		752	/* have to use the microsoft-never-gets-it-right macro */
		753	array_free_microshit (fdchange);
		754	array_free_microshit (timer);
		755	array_free_microshit (periodic);
		756	array_free_microshit (idle);
		757	array_free_microshit (prepare);
		758	array_free_microshit (check);
		759
		760	method = 0;
		761	}
		762
		763	static void
		764	loop_fork (EV_P)
		765	{
		766	#if EV_USE_EPOLL
		767	if (method == EVMETHOD_EPOLL ) epoll_fork (EV_A);
		768	#endif
		769	#if EV_USE_KQUEUE
		770	if (method == EVMETHOD_KQUEUE) kqueue_fork (EV_A);
		771	#endif
		772
		773	if (ev_is_active (&sigev))
		774	{
		775	/* default loop */
		776
		777	ev_ref (EV_A);
		778	ev_io_stop (EV_A_ &sigev);
		779	close (sigpipe [0]);
		780	close (sigpipe [1]);
		781
		782	while (pipe (sigpipe))
		783	syserr ("(libev) error creating pipe");
		784
		785	siginit (EV_A);
		786	}
		787
		788	postfork = 0;
		789	}
		790
		791	#if EV_MULTIPLICITY
		792	struct ev_loop *
		793	ev_loop_new (int methods)
		794	{
		795	struct ev_loop *loop = (struct ev_loop *)ev_malloc (sizeof (struct ev_loop));
		796
		797	memset (loop, 0, sizeof (struct ev_loop));
		798
		799	loop_init (EV_A_ methods);
		800
		801	if (ev_method (EV_A))
		802	return loop;
		803
		804	return 0;
		805	}
		806
		807	void
		808	ev_loop_destroy (EV_P)
		809	{
		810	loop_destroy (EV_A);
		811	ev_free (loop);
		812	}
		813
		814	void
		815	ev_loop_fork (EV_P)
		816	{
		817	postfork = 1;
		818	}
		819
		820	#endif
		821
		822	#if EV_MULTIPLICITY
		823	struct ev_loop default_loop_struct;
		824	static struct ev_loop *default_loop;
		825
		826	struct ev_loop *
		827	#else
		828	static int default_loop;
		829
		830	int
		831	#endif
		832	ev_default_loop (int methods)
		833	{
		834	if (sigpipe [0] == sigpipe [1])
		835	if (pipe (sigpipe))
		836	return 0;
		837
		838	if (!default_loop)
		839	{
		840	#if EV_MULTIPLICITY
		841	struct ev_loop *loop = default_loop = &default_loop_struct;
		842	#else
		843	default_loop = 1;
		844	#endif
		845
		846	loop_init (EV_A_ methods);
		847
592	if (ev_method)	848	if (ev_method (EV_A))
593	{	849	{
594	ev_watcher_init (&sigev, sigcb);
595	ev_set_priority (&sigev, EV_MAXPRI);
596	siginit ();	850	siginit (EV_A);
597		851
598	#ifndef WIN32	852	#ifndef WIN32
599	ev_signal_init (&childev, childcb, SIGCHLD);	853	ev_signal_init (&childev, childcb, SIGCHLD);
600	ev_set_priority (&childev, EV_MAXPRI);	854	ev_set_priority (&childev, EV_MAXPRI);
601	ev_signal_start (&childev);	855	ev_signal_start (EV_A_ &childev);
		856	ev_unref (EV_A); /* child watcher should not keep loop alive */
602	#endif	857	#endif
603	}	858	}
		859	else
		860	default_loop = 0;
604	}	861	}
605		862
606	return ev_method;	863	return default_loop;
		864	}
		865
		866	void
		867	ev_default_destroy (void)
		868	{
		869	#if EV_MULTIPLICITY
		870	struct ev_loop *loop = default_loop;
		871	#endif
		872
		873	#ifndef WIN32
		874	ev_ref (EV_A); /* child watcher */
		875	ev_signal_stop (EV_A_ &childev);
		876	#endif
		877
		878	ev_ref (EV_A); /* signal watcher */
		879	ev_io_stop (EV_A_ &sigev);
		880
		881	close (sigpipe [0]); sigpipe [0] = 0;
		882	close (sigpipe [1]); sigpipe [1] = 0;
		883
		884	loop_destroy (EV_A);
		885	}
		886
		887	void
		888	ev_default_fork (void)
		889	{
		890	#if EV_MULTIPLICITY
		891	struct ev_loop *loop = default_loop;
		892	#endif
		893
		894	if (method)
		895	postfork = 1;
607	}	896	}
608		897
609	/*****************************************************************************/	898	/*****************************************************************************/
610		899
611	void
612	ev_fork_prepare (void)
613	{
614	/* nop */
615	}
616
617	void
618	ev_fork_parent (void)
619	{
620	/* nop */
621	}
622
623	void
624	ev_fork_child (void)
625	{
626	#if EV_USE_EPOLL
627	if (ev_method == EVMETHOD_EPOLL)
628	epoll_postfork_child ();
629	#endif
630
631	ev_io_stop (&sigev);
632	close (sigpipe [0]);
633	close (sigpipe [1]);
634	pipe (sigpipe);
635	siginit ();
636	}
637
638	/*****************************************************************************/
639
640	static void	900	static void
641	call_pending (void)	901	call_pending (EV_P)
642	{	902	{
643	int pri;	903	int pri;
644		904
645	for (pri = NUMPRI; pri--; )	905	for (pri = NUMPRI; pri--; )
646	while (pendingcnt [pri])	906	while (pendingcnt [pri])
…		…
648	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	908	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
649		909
650	if (p->w)	910	if (p->w)
651	{	911	{
652	p->w->pending = 0;	912	p->w->pending = 0;
653	p->w->cb (p->w, p->events);	913	p->w->cb (EV_A_ p->w, p->events);
654	}	914	}
655	}	915	}
656	}	916	}
657		917
658	static void	918	static void
659	timers_reify (void)	919	timers_reify (EV_P)
660	{	920	{
661	while (timercnt && timers [0]->at <= now)	921	while (timercnt && ((WT)timers [0])->at <= mn_now)
662	{	922	{
663	struct ev_timer *w = timers [0];	923	struct ev_timer *w = timers [0];
		924
		925	assert (("inactive timer on timer heap detected", ev_is_active (w)));
664		926
665	/* first reschedule or stop timer */	927	/* first reschedule or stop timer */
666	if (w->repeat)	928	if (w->repeat)
667	{	929	{
668	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	930	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
669	w->at = now + w->repeat;	931	((WT)w)->at = mn_now + w->repeat;
670	downheap ((WT *)timers, timercnt, 0);	932	downheap ((WT *)timers, timercnt, 0);
671	}	933	}
672	else	934	else
673	ev_timer_stop (w); /* nonrepeating: stop timer */	935	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
674		936
675	event ((W)w, EV_TIMEOUT);	937	event (EV_A_ (W)w, EV_TIMEOUT);
676	}	938	}
677	}	939	}
678		940
679	static void	941	static void
680	periodics_reify (void)	942	periodics_reify (EV_P)
681	{	943	{
682	while (periodiccnt && periodics [0]->at <= ev_now)	944	while (periodiccnt && ((WT)periodics [0])->at <= rt_now)
683	{	945	{
684	struct ev_periodic *w = periodics [0];	946	struct ev_periodic *w = periodics [0];
		947
		948	assert (("inactive timer on periodic heap detected", ev_is_active (w)));
685		949
686	/* first reschedule or stop timer */	950	/* first reschedule or stop timer */
687	if (w->interval)	951	if (w->interval)
688	{	952	{
689	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;	953	((WT)w)->at += floor ((rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;
690	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", w->at > ev_now));	954	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > rt_now));
691	downheap ((WT *)periodics, periodiccnt, 0);	955	downheap ((WT *)periodics, periodiccnt, 0);
692	}	956	}
693	else	957	else
694	ev_periodic_stop (w); /* nonrepeating: stop timer */	958	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
695		959
696	event ((W)w, EV_PERIODIC);	960	event (EV_A_ (W)w, EV_PERIODIC);
697	}	961	}
698	}	962	}
699		963
700	static void	964	static void
701	periodics_reschedule (ev_tstamp diff)	965	periodics_reschedule (EV_P)
702	{	966	{
703	int i;	967	int i;
704		968
705	/* adjust periodics after time jump */	969	/* adjust periodics after time jump */
706	for (i = 0; i < periodiccnt; ++i)	970	for (i = 0; i < periodiccnt; ++i)
707	{	971	{
708	struct ev_periodic *w = periodics [i];	972	struct ev_periodic *w = periodics [i];
709		973
710	if (w->interval)	974	if (w->interval)
711	{	975	{
712	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;	976	ev_tstamp diff = ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
713		977
714	if (fabs (diff) >= 1e-4)	978	if (fabs (diff) >= 1e-4)
715	{	979	{
716	ev_periodic_stop (w);	980	ev_periodic_stop (EV_A_ w);
717	ev_periodic_start (w);	981	ev_periodic_start (EV_A_ w);
718		982
719	i = 0; /* restart loop, inefficient, but time jumps should be rare */	983	i = 0; /* restart loop, inefficient, but time jumps should be rare */
720	}	984	}
721	}	985	}
722	}	986	}
723	}	987	}
724		988
725	static int	989	inline int
726	time_update_monotonic (void)	990	time_update_monotonic (EV_P)
727	{	991	{
728	now = get_clock ();	992	mn_now = get_clock ();
729		993
730	if (expect_true (now - now_floor < MIN_TIMEJUMP * .5))	994	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
731	{	995	{
732	ev_now = now + diff;	996	rt_now = rtmn_diff + mn_now;
733	return 0;	997	return 0;
734	}	998	}
735	else	999	else
736	{	1000	{
737	now_floor = now;	1001	now_floor = mn_now;
738	ev_now = ev_time ();	1002	rt_now = ev_time ();
739	return 1;	1003	return 1;
740	}	1004	}
741	}	1005	}
742		1006
743	static void	1007	static void
744	time_update (void)	1008	time_update (EV_P)
745	{	1009	{
746	int i;	1010	int i;
747		1011
748	#if EV_USE_MONOTONIC	1012	#if EV_USE_MONOTONIC
749	if (expect_true (have_monotonic))	1013	if (expect_true (have_monotonic))
750	{	1014	{
751	if (time_update_monotonic ())	1015	if (time_update_monotonic (EV_A))
752	{	1016	{
753	ev_tstamp odiff = diff;	1017	ev_tstamp odiff = rtmn_diff;
754		1018
755	for (i = 4; --i; ) /* loop a few times, before making important decisions */	1019	for (i = 4; --i; ) /* loop a few times, before making important decisions */
756	{	1020	{
757	diff = ev_now - now;	1021	rtmn_diff = rt_now - mn_now;
758		1022
759	if (fabs (odiff - diff) < MIN_TIMEJUMP)	1023	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
760	return; /* all is well */	1024	return; /* all is well */
761		1025
762	ev_now = ev_time ();	1026	rt_now = ev_time ();
763	now = get_clock ();	1027	mn_now = get_clock ();
764	now_floor = now;	1028	now_floor = mn_now;
765	}	1029	}
766		1030
767	periodics_reschedule (diff - odiff);	1031	periodics_reschedule (EV_A);
768	/* no timer adjustment, as the monotonic clock doesn't jump */	1032	/* no timer adjustment, as the monotonic clock doesn't jump */
		1033	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
769	}	1034	}
770	}	1035	}
771	else	1036	else
772	#endif	1037	#endif
773	{	1038	{
774	ev_now = ev_time ();	1039	rt_now = ev_time ();
775		1040
776	if (expect_false (now > ev_now || now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1041	if (expect_false (mn_now > rt_now || mn_now < rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
777	{	1042	{
778	periodics_reschedule (ev_now - now);	1043	periodics_reschedule (EV_A);
779		1044
780	/* adjust timers. this is easy, as the offset is the same for all */	1045	/* adjust timers. this is easy, as the offset is the same for all */
781	for (i = 0; i < timercnt; ++i)	1046	for (i = 0; i < timercnt; ++i)
782	timers [i]->at += diff;	1047	((WT)timers [i])->at += rt_now - mn_now;
783	}	1048	}
784		1049
785	now = ev_now;	1050	mn_now = rt_now;
786	}	1051	}
787	}	1052	}
788		1053
789	int ev_loop_done;	1054	void
		1055	ev_ref (EV_P)
		1056	{
		1057	++activecnt;
		1058	}
790		1059
		1060	void
		1061	ev_unref (EV_P)
		1062	{
		1063	--activecnt;
		1064	}
		1065
		1066	static int loop_done;
		1067
		1068	void
791	void ev_loop (int flags)	1069	ev_loop (EV_P_ int flags)
792	{	1070	{
793	double block;	1071	double block;
794	ev_loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;	1072	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK) ? 1 : 0;
795		1073
796	do	1074	do
797	{	1075	{
798	/* queue check watchers (and execute them) */	1076	/* queue check watchers (and execute them) */
799	if (expect_false (preparecnt))	1077	if (expect_false (preparecnt))
800	{	1078	{
801	queue_events ((W *)prepares, preparecnt, EV_PREPARE);	1079	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
802	call_pending ();	1080	call_pending (EV_A);
803	}	1081	}
804		1082
		1083	/* we might have forked, so reify kernel state if necessary */
		1084	if (expect_false (postfork))
		1085	loop_fork (EV_A);
		1086
805	/* update fd-related kernel structures */	1087	/* update fd-related kernel structures */
806	fd_reify ();	1088	fd_reify (EV_A);
807		1089
808	/* calculate blocking time */	1090	/* calculate blocking time */
809		1091
810	/* we only need this for !monotonic clockor timers, but as we basically	1092	/* we only need this for !monotonic clockor timers, but as we basically
811	always have timers, we just calculate it always */	1093	always have timers, we just calculate it always */
812	#if EV_USE_MONOTONIC	1094	#if EV_USE_MONOTONIC
813	if (expect_true (have_monotonic))	1095	if (expect_true (have_monotonic))
814	time_update_monotonic ();	1096	time_update_monotonic (EV_A);
815	else	1097	else
816	#endif	1098	#endif
817	{	1099	{
818	ev_now = ev_time ();	1100	rt_now = ev_time ();
819	now = ev_now;	1101	mn_now = rt_now;
820	}	1102	}
821		1103
822	if (flags & EVLOOP_NONBLOCK || idlecnt)	1104	if (flags & EVLOOP_NONBLOCK || idlecnt)
823	block = 0.;	1105	block = 0.;
824	else	1106	else
825	{	1107	{
826	block = MAX_BLOCKTIME;	1108	block = MAX_BLOCKTIME;
827		1109
828	if (timercnt)	1110	if (timercnt)
829	{	1111	{
830	ev_tstamp to = timers [0]->at - now + method_fudge;	1112	ev_tstamp to = ((WT)timers [0])->at - mn_now + method_fudge;
831	if (block > to) block = to;	1113	if (block > to) block = to;
832	}	1114	}
833		1115
834	if (periodiccnt)	1116	if (periodiccnt)
835	{	1117	{
836	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;	1118	ev_tstamp to = ((WT)periodics [0])->at - rt_now + method_fudge;
837	if (block > to) block = to;	1119	if (block > to) block = to;
838	}	1120	}
839		1121
840	if (block < 0.) block = 0.;	1122	if (block < 0.) block = 0.;
841	}	1123	}
842		1124
843	method_poll (block);	1125	method_poll (EV_A_ block);
844		1126
845	/* update ev_now, do magic */	1127	/* update rt_now, do magic */
846	time_update ();	1128	time_update (EV_A);
847		1129
848	/* queue pending timers and reschedule them */	1130	/* queue pending timers and reschedule them */
849	timers_reify (); /* relative timers called last */	1131	timers_reify (EV_A); /* relative timers called last */
850	periodics_reify (); /* absolute timers called first */	1132	periodics_reify (EV_A); /* absolute timers called first */
851		1133
852	/* queue idle watchers unless io or timers are pending */	1134	/* queue idle watchers unless io or timers are pending */
853	if (!pendingcnt)	1135	if (!pendingcnt)
854	queue_events ((W *)idles, idlecnt, EV_IDLE);	1136	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);
855		1137
856	/* queue check watchers, to be executed first */	1138	/* queue check watchers, to be executed first */
857	if (checkcnt)	1139	if (checkcnt)
858	queue_events ((W *)checks, checkcnt, EV_CHECK);	1140	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
859		1141
860	call_pending ();	1142	call_pending (EV_A);
861	}	1143	}
862	while (!ev_loop_done);	1144	while (activecnt && !loop_done);
863		1145
864	if (ev_loop_done != 2)	1146	if (loop_done != 2)
865	ev_loop_done = 0;	1147	loop_done = 0;
		1148	}
		1149
		1150	void
		1151	ev_unloop (EV_P_ int how)
		1152	{
		1153	loop_done = how;
866	}	1154	}
867		1155
868	/*****************************************************************************/	1156	/*****************************************************************************/
869		1157
870	static void	1158	inline void
871	wlist_add (WL *head, WL elem)	1159	wlist_add (WL *head, WL elem)
872	{	1160	{
873	elem->next = *head;	1161	elem->next = *head;
874	*head = elem;	1162	*head = elem;
875	}	1163	}
876		1164
877	static void	1165	inline void
878	wlist_del (WL *head, WL elem)	1166	wlist_del (WL *head, WL elem)
879	{	1167	{
880	while (*head)	1168	while (*head)
881	{	1169	{
882	if (*head == elem)	1170	if (*head == elem)
…		…
887		1175
888	head = &(*head)->next;	1176	head = &(*head)->next;
889	}	1177	}
890	}	1178	}
891		1179
892	static void	1180	inline void
893	ev_clear_pending (W w)	1181	ev_clear_pending (EV_P_ W w)
894	{	1182	{
895	if (w->pending)	1183	if (w->pending)
896	{	1184	{
897	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1185	pendings [ABSPRI (w)][w->pending - 1].w = 0;
898	w->pending = 0;	1186	w->pending = 0;
899	}	1187	}
900	}	1188	}
901		1189
902	static void	1190	inline void
903	ev_start (W w, int active)	1191	ev_start (EV_P_ W w, int active)
904	{	1192	{
905	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1193	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;
906	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;	1194	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
907		1195
908	w->active = active;	1196	w->active = active;
		1197	ev_ref (EV_A);
909	}	1198	}
910		1199
911	static void	1200	inline void
912	ev_stop (W w)	1201	ev_stop (EV_P_ W w)
913	{	1202	{
		1203	ev_unref (EV_A);
914	w->active = 0;	1204	w->active = 0;
915	}	1205	}
916		1206
917	/*****************************************************************************/	1207	/*****************************************************************************/
918		1208
919	void	1209	void
920	ev_io_start (struct ev_io *w)	1210	ev_io_start (EV_P_ struct ev_io *w)
921	{	1211	{
922	int fd = w->fd;	1212	int fd = w->fd;
923		1213
924	if (ev_is_active (w))	1214	if (ev_is_active (w))
925	return;	1215	return;
926		1216
927	assert (("ev_io_start called with negative fd", fd >= 0));	1217	assert (("ev_io_start called with negative fd", fd >= 0));
928		1218
929	ev_start ((W)w, 1);	1219	ev_start (EV_A_ (W)w, 1);
930	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	1220	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
931	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1221	wlist_add ((WL *)&anfds[fd].head, (WL)w);
932		1222
933	fd_change (fd);	1223	fd_change (EV_A_ fd);
934	}	1224	}
935		1225
936	void	1226	void
937	ev_io_stop (struct ev_io *w)	1227	ev_io_stop (EV_P_ struct ev_io *w)
938	{	1228	{
939	ev_clear_pending ((W)w);	1229	ev_clear_pending (EV_A_ (W)w);
940	if (!ev_is_active (w))	1230	if (!ev_is_active (w))
941	return;	1231	return;
942		1232
943	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	1233	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
944	ev_stop ((W)w);	1234	ev_stop (EV_A_ (W)w);
945		1235
946	fd_change (w->fd);	1236	fd_change (EV_A_ w->fd);
947	}	1237	}
948		1238
949	void	1239	void
950	ev_timer_start (struct ev_timer *w)	1240	ev_timer_start (EV_P_ struct ev_timer *w)
951	{	1241	{
952	if (ev_is_active (w))	1242	if (ev_is_active (w))
953	return;	1243	return;
954		1244
955	w->at += now;	1245	((WT)w)->at += mn_now;
956		1246
957	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1247	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
958		1248
959	ev_start ((W)w, ++timercnt);	1249	ev_start (EV_A_ (W)w, ++timercnt);
960	array_needsize (timers, timermax, timercnt, );	1250	array_needsize (timers, timermax, timercnt, (void));
961	timers [timercnt - 1] = w;	1251	timers [timercnt - 1] = w;
962	upheap ((WT *)timers, timercnt - 1);	1252	upheap ((WT *)timers, timercnt - 1);
963	}
964		1253
		1254	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1255	}
		1256
965	void	1257	void
966	ev_timer_stop (struct ev_timer *w)	1258	ev_timer_stop (EV_P_ struct ev_timer *w)
967	{	1259	{
968	ev_clear_pending ((W)w);	1260	ev_clear_pending (EV_A_ (W)w);
969	if (!ev_is_active (w))	1261	if (!ev_is_active (w))
970	return;	1262	return;
971		1263
		1264	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
		1265
972	if (w->active < timercnt--)	1266	if (((W)w)->active < timercnt--)
973	{	1267	{
974	timers [w->active - 1] = timers [timercnt];	1268	timers [((W)w)->active - 1] = timers [timercnt];
975	downheap ((WT *)timers, timercnt, w->active - 1);	1269	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
976	}	1270	}
977		1271
978	w->at = w->repeat;	1272	((WT)w)->at = w->repeat;
979		1273
980	ev_stop ((W)w);	1274	ev_stop (EV_A_ (W)w);
981	}	1275	}
982		1276
983	void	1277	void
984	ev_timer_again (struct ev_timer *w)	1278	ev_timer_again (EV_P_ struct ev_timer *w)
985	{	1279	{
986	if (ev_is_active (w))	1280	if (ev_is_active (w))
987	{	1281	{
988	if (w->repeat)	1282	if (w->repeat)
989	{	1283	{
990	w->at = now + w->repeat;	1284	((WT)w)->at = mn_now + w->repeat;
991	downheap ((WT *)timers, timercnt, w->active - 1);	1285	downheap ((WT *)timers, timercnt, ((W)w)->active - 1);
992	}	1286	}
993	else	1287	else
994	ev_timer_stop (w);	1288	ev_timer_stop (EV_A_ w);
995	}	1289	}
996	else if (w->repeat)	1290	else if (w->repeat)
997	ev_timer_start (w);	1291	ev_timer_start (EV_A_ w);
998	}	1292	}
999		1293
1000	void	1294	void
1001	ev_periodic_start (struct ev_periodic *w)	1295	ev_periodic_start (EV_P_ struct ev_periodic *w)
1002	{	1296	{
1003	if (ev_is_active (w))	1297	if (ev_is_active (w))
1004	return;	1298	return;
1005		1299
1006	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1300	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1007		1301
1008	/* this formula differs from the one in periodic_reify because we do not always round up */	1302	/* this formula differs from the one in periodic_reify because we do not always round up */
1009	if (w->interval)	1303	if (w->interval)
1010	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;	1304	((WT)w)->at += ceil ((rt_now - ((WT)w)->at) / w->interval) * w->interval;
1011		1305
1012	ev_start ((W)w, ++periodiccnt);	1306	ev_start (EV_A_ (W)w, ++periodiccnt);
1013	array_needsize (periodics, periodicmax, periodiccnt, );	1307	array_needsize (periodics, periodicmax, periodiccnt, (void));
1014	periodics [periodiccnt - 1] = w;	1308	periodics [periodiccnt - 1] = w;
1015	upheap ((WT *)periodics, periodiccnt - 1);	1309	upheap ((WT *)periodics, periodiccnt - 1);
1016	}
1017		1310
		1311	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1312	}
		1313
1018	void	1314	void
1019	ev_periodic_stop (struct ev_periodic *w)	1315	ev_periodic_stop (EV_P_ struct ev_periodic *w)
1020	{	1316	{
1021	ev_clear_pending ((W)w);	1317	ev_clear_pending (EV_A_ (W)w);
1022	if (!ev_is_active (w))	1318	if (!ev_is_active (w))
1023	return;	1319	return;
1024		1320
		1321	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
		1322
1025	if (w->active < periodiccnt--)	1323	if (((W)w)->active < periodiccnt--)
1026	{	1324	{
1027	periodics [w->active - 1] = periodics [periodiccnt];	1325	periodics [((W)w)->active - 1] = periodics [periodiccnt];
1028	downheap ((WT *)periodics, periodiccnt, w->active - 1);	1326	downheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);
1029	}	1327	}
1030		1328
1031	ev_stop ((W)w);	1329	ev_stop (EV_A_ (W)w);
		1330	}
		1331
		1332	void
		1333	ev_idle_start (EV_P_ struct ev_idle *w)
		1334	{
		1335	if (ev_is_active (w))
		1336	return;
		1337
		1338	ev_start (EV_A_ (W)w, ++idlecnt);
		1339	array_needsize (idles, idlemax, idlecnt, (void));
		1340	idles [idlecnt - 1] = w;
		1341	}
		1342
		1343	void
		1344	ev_idle_stop (EV_P_ struct ev_idle *w)
		1345	{
		1346	ev_clear_pending (EV_A_ (W)w);
		1347	if (ev_is_active (w))
		1348	return;
		1349
		1350	idles [((W)w)->active - 1] = idles [--idlecnt];
		1351	ev_stop (EV_A_ (W)w);
		1352	}
		1353
		1354	void
		1355	ev_prepare_start (EV_P_ struct ev_prepare *w)
		1356	{
		1357	if (ev_is_active (w))
		1358	return;
		1359
		1360	ev_start (EV_A_ (W)w, ++preparecnt);
		1361	array_needsize (prepares, preparemax, preparecnt, (void));
		1362	prepares [preparecnt - 1] = w;
		1363	}
		1364
		1365	void
		1366	ev_prepare_stop (EV_P_ struct ev_prepare *w)
		1367	{
		1368	ev_clear_pending (EV_A_ (W)w);
		1369	if (ev_is_active (w))
		1370	return;
		1371
		1372	prepares [((W)w)->active - 1] = prepares [--preparecnt];
		1373	ev_stop (EV_A_ (W)w);
		1374	}
		1375
		1376	void
		1377	ev_check_start (EV_P_ struct ev_check *w)
		1378	{
		1379	if (ev_is_active (w))
		1380	return;
		1381
		1382	ev_start (EV_A_ (W)w, ++checkcnt);
		1383	array_needsize (checks, checkmax, checkcnt, (void));
		1384	checks [checkcnt - 1] = w;
		1385	}
		1386
		1387	void
		1388	ev_check_stop (EV_P_ struct ev_check *w)
		1389	{
		1390	ev_clear_pending (EV_A_ (W)w);
		1391	if (ev_is_active (w))
		1392	return;
		1393
		1394	checks [((W)w)->active - 1] = checks [--checkcnt];
		1395	ev_stop (EV_A_ (W)w);
1032	}	1396	}
1033		1397
1034	#ifndef SA_RESTART	1398	#ifndef SA_RESTART
1035	# define SA_RESTART 0	1399	# define SA_RESTART 0
1036	#endif	1400	#endif
1037		1401
1038	void	1402	void
1039	ev_signal_start (struct ev_signal *w)	1403	ev_signal_start (EV_P_ struct ev_signal *w)
1040	{	1404	{
		1405	#if EV_MULTIPLICITY
		1406	assert (("signal watchers are only supported in the default loop", loop == default_loop));
		1407	#endif
1041	if (ev_is_active (w))	1408	if (ev_is_active (w))
1042	return;	1409	return;
1043		1410
1044	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1411	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1045		1412
1046	ev_start ((W)w, 1);	1413	ev_start (EV_A_ (W)w, 1);
1047	array_needsize (signals, signalmax, w->signum, signals_init);	1414	array_needsize (signals, signalmax, w->signum, signals_init);
1048	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1415	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1049		1416
1050	if (!w->next)	1417	if (!((WL)w)->next)
1051	{	1418	{
		1419	#if WIN32
		1420	signal (w->signum, sighandler);
		1421	#else
1052	struct sigaction sa;	1422	struct sigaction sa;
1053	sa.sa_handler = sighandler;	1423	sa.sa_handler = sighandler;
1054	sigfillset (&sa.sa_mask);	1424	sigfillset (&sa.sa_mask);
1055	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	1425	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1056	sigaction (w->signum, &sa, 0);	1426	sigaction (w->signum, &sa, 0);
		1427	#endif
1057	}	1428	}
1058	}	1429	}
1059		1430
1060	void	1431	void
1061	ev_signal_stop (struct ev_signal *w)	1432	ev_signal_stop (EV_P_ struct ev_signal *w)
1062	{	1433	{
1063	ev_clear_pending ((W)w);	1434	ev_clear_pending (EV_A_ (W)w);
1064	if (!ev_is_active (w))	1435	if (!ev_is_active (w))
1065	return;	1436	return;
1066		1437
1067	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1438	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1068	ev_stop ((W)w);	1439	ev_stop (EV_A_ (W)w);
1069		1440
1070	if (!signals [w->signum - 1].head)	1441	if (!signals [w->signum - 1].head)
1071	signal (w->signum, SIG_DFL);	1442	signal (w->signum, SIG_DFL);
1072	}	1443	}
1073		1444
1074	void	1445	void
1075	ev_idle_start (struct ev_idle *w)	1446	ev_child_start (EV_P_ struct ev_child *w)
1076	{	1447	{
		1448	#if EV_MULTIPLICITY
		1449	assert (("child watchers are only supported in the default loop", loop == default_loop));
		1450	#endif
1077	if (ev_is_active (w))	1451	if (ev_is_active (w))
1078	return;	1452	return;
1079		1453
1080	ev_start ((W)w, ++idlecnt);	1454	ev_start (EV_A_ (W)w, 1);
1081	array_needsize (idles, idlemax, idlecnt, );	1455	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1082	idles [idlecnt - 1] = w;
1083	}	1456	}
1084		1457
1085	void	1458	void
1086	ev_idle_stop (struct ev_idle *w)	1459	ev_child_stop (EV_P_ struct ev_child *w)
1087	{	1460	{
1088	ev_clear_pending ((W)w);	1461	ev_clear_pending (EV_A_ (W)w);
1089	if (ev_is_active (w))	1462	if (ev_is_active (w))
1090	return;	1463	return;
1091		1464
1092	idles [w->active - 1] = idles [--idlecnt];
1093	ev_stop ((W)w);
1094	}
1095
1096	void
1097	ev_prepare_start (struct ev_prepare *w)
1098	{
1099	if (ev_is_active (w))
1100	return;
1101
1102	ev_start ((W)w, ++preparecnt);
1103	array_needsize (prepares, preparemax, preparecnt, );
1104	prepares [preparecnt - 1] = w;
1105	}
1106
1107	void
1108	ev_prepare_stop (struct ev_prepare *w)
1109	{
1110	ev_clear_pending ((W)w);
1111	if (ev_is_active (w))
1112	return;
1113
1114	prepares [w->active - 1] = prepares [--preparecnt];
1115	ev_stop ((W)w);
1116	}
1117
1118	void
1119	ev_check_start (struct ev_check *w)
1120	{
1121	if (ev_is_active (w))
1122	return;
1123
1124	ev_start ((W)w, ++checkcnt);
1125	array_needsize (checks, checkmax, checkcnt, );
1126	checks [checkcnt - 1] = w;
1127	}
1128
1129	void
1130	ev_check_stop (struct ev_check *w)
1131	{
1132	ev_clear_pending ((W)w);
1133	if (ev_is_active (w))
1134	return;
1135
1136	checks [w->active - 1] = checks [--checkcnt];
1137	ev_stop ((W)w);
1138	}
1139
1140	void
1141	ev_child_start (struct ev_child *w)
1142	{
1143	if (ev_is_active (w))
1144	return;
1145
1146	ev_start ((W)w, 1);
1147	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1148	}
1149
1150	void
1151	ev_child_stop (struct ev_child *w)
1152	{
1153	ev_clear_pending ((W)w);
1154	if (ev_is_active (w))
1155	return;
1156
1157	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1465	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
1158	ev_stop ((W)w);	1466	ev_stop (EV_A_ (W)w);
1159	}	1467	}
1160		1468
1161	/*****************************************************************************/	1469	/*****************************************************************************/
1162		1470
1163	struct ev_once	1471	struct ev_once
…		…
1167	void (*cb)(int revents, void *arg);	1475	void (*cb)(int revents, void *arg);
1168	void *arg;	1476	void *arg;
1169	};	1477	};
1170		1478
1171	static void	1479	static void
1172	once_cb (struct ev_once *once, int revents)	1480	once_cb (EV_P_ struct ev_once *once, int revents)
1173	{	1481	{
1174	void (*cb)(int revents, void *arg) = once->cb;	1482	void (*cb)(int revents, void *arg) = once->cb;
1175	void *arg = once->arg;	1483	void *arg = once->arg;
1176		1484
1177	ev_io_stop (&once->io);	1485	ev_io_stop (EV_A_ &once->io);
1178	ev_timer_stop (&once->to);	1486	ev_timer_stop (EV_A_ &once->to);
1179	free (once);	1487	ev_free (once);
1180		1488
1181	cb (revents, arg);	1489	cb (revents, arg);
1182	}	1490	}
1183		1491
1184	static void	1492	static void
1185	once_cb_io (struct ev_io *w, int revents)	1493	once_cb_io (EV_P_ struct ev_io *w, int revents)
1186	{	1494	{
1187	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);	1495	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, io)), revents);
1188	}	1496	}
1189		1497
1190	static void	1498	static void
1191	once_cb_to (struct ev_timer *w, int revents)	1499	once_cb_to (EV_P_ struct ev_timer *w, int revents)
1192	{	1500	{
1193	once_cb ((struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);	1501	once_cb (EV_A_ (struct ev_once *)(((char *)w) - offsetof (struct ev_once, to)), revents);
1194	}	1502	}
1195		1503
1196	void	1504	void
1197	ev_once (int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)	1505	ev_once (EV_P_ int fd, int events, ev_tstamp timeout, void (*cb)(int revents, void *arg), void *arg)
1198	{	1506	{
1199	struct ev_once *once = malloc (sizeof (struct ev_once));	1507	struct ev_once *once = ev_malloc (sizeof (struct ev_once));
1200		1508
1201	if (!once)	1509	if (!once)
1202	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);	1510	cb (EV_ERROR | EV_READ | EV_WRITE | EV_TIMEOUT, arg);
1203	else	1511	else
1204	{	1512	{
…		…
1207		1515
1208	ev_watcher_init (&once->io, once_cb_io);	1516	ev_watcher_init (&once->io, once_cb_io);
1209	if (fd >= 0)	1517	if (fd >= 0)
1210	{	1518	{
1211	ev_io_set (&once->io, fd, events);	1519	ev_io_set (&once->io, fd, events);
1212	ev_io_start (&once->io);	1520	ev_io_start (EV_A_ &once->io);
1213	}	1521	}
1214		1522
1215	ev_watcher_init (&once->to, once_cb_to);	1523	ev_watcher_init (&once->to, once_cb_to);
1216	if (timeout >= 0.)	1524	if (timeout >= 0.)
1217	{	1525	{
1218	ev_timer_set (&once->to, timeout, 0.);	1526	ev_timer_set (&once->to, timeout, 0.);
1219	ev_timer_start (&once->to);	1527	ev_timer_start (EV_A_ &once->to);
1220	}	1528	}
1221	}	1529	}
1222	}	1530	}
1223		1531
1224	/*****************************************************************************/
1225
1226	#if 0
1227
1228	struct ev_io wio;
1229
1230	static void
1231	sin_cb (struct ev_io *w, int revents)
1232	{
1233	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
1234	}
1235
1236	static void
1237	ocb (struct ev_timer *w, int revents)
1238	{
1239	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
1240	ev_timer_stop (w);
1241	ev_timer_start (w);
1242	}
1243
1244	static void
1245	scb (struct ev_signal *w, int revents)
1246	{
1247	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
1248	ev_io_stop (&wio);
1249	ev_io_start (&wio);
1250	}
1251
1252	static void
1253	gcb (struct ev_signal *w, int revents)
1254	{
1255	fprintf (stderr, "generic %x\n", revents);
1256
1257	}
1258
1259	int main (void)
1260	{
1261	ev_init (0);
1262
1263	ev_io_init (&wio, sin_cb, 0, EV_READ);
1264	ev_io_start (&wio);
1265
1266	struct ev_timer t[10000];
1267
1268	#if 0
1269	int i;
1270	for (i = 0; i < 10000; ++i)
1271	{
1272	struct ev_timer *w = t + i;
1273	ev_watcher_init (w, ocb, i);
1274	ev_timer_init_abs (w, ocb, drand48 (), 0.99775533);
1275	ev_timer_start (w);
1276	if (drand48 () < 0.5)
1277	ev_timer_stop (w);
1278	}
1279	#endif
1280
1281	struct ev_timer t1;
1282	ev_timer_init (&t1, ocb, 5, 10);
1283	ev_timer_start (&t1);
1284
1285	struct ev_signal sig;
1286	ev_signal_init (&sig, scb, SIGQUIT);
1287	ev_signal_start (&sig);
1288
1289	struct ev_check cw;
1290	ev_check_init (&cw, gcb);
1291	ev_check_start (&cw);
1292
1293	struct ev_idle iw;
1294	ev_idle_init (&iw, gcb);
1295	ev_idle_start (&iw);
1296
1297	ev_loop (0);
1298
1299	return 0;
1300	}
1301
1302	#endif
1303
1304
1305
1306

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