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Comparing libev/ev.c (file contents):
Revision 1.139 by root, Sun Nov 25 09:24:37 2007 UTC vs.
Revision 1.181 by root, Wed Dec 12 00:17:08 2007 UTC

…		…
94	# else	94	# else
95	# define EV_USE_PORT 0	95	# define EV_USE_PORT 0
96	# endif	96	# endif
97	# endif	97	# endif
98		98
		99	# ifndef EV_USE_INOTIFY
		100	# if HAVE_INOTIFY_INIT && HAVE_SYS_INOTIFY_H
		101	# define EV_USE_INOTIFY 1
		102	# else
		103	# define EV_USE_INOTIFY 0
		104	# endif
		105	# endif
		106
99	#endif	107	#endif
100		108
101	#include <math.h>	109	#include <math.h>
102	#include <stdlib.h>	110	#include <stdlib.h>
103	#include <fcntl.h>	111	#include <fcntl.h>
…		…
110	#include <sys/types.h>	118	#include <sys/types.h>
111	#include <time.h>	119	#include <time.h>
112		120
113	#include <signal.h>	121	#include <signal.h>
114		122
		123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
		128
115	#ifndef _WIN32	129	#ifndef _WIN32
116	# include <unistd.h>
117	# include <sys/time.h>	130	# include <sys/time.h>
118	# include <sys/wait.h>	131	# include <sys/wait.h>
		132	# include <unistd.h>
119	#else	133	#else
120	# define WIN32_LEAN_AND_MEAN	134	# define WIN32_LEAN_AND_MEAN
121	# include <windows.h>	135	# include <windows.h>
122	# ifndef EV_SELECT_IS_WINSOCKET	136	# ifndef EV_SELECT_IS_WINSOCKET
123	# define EV_SELECT_IS_WINSOCKET 1	137	# define EV_SELECT_IS_WINSOCKET 1
…		…
156		170
157	#ifndef EV_USE_PORT	171	#ifndef EV_USE_PORT
158	# define EV_USE_PORT 0	172	# define EV_USE_PORT 0
159	#endif	173	#endif
160		174
		175	#ifndef EV_USE_INOTIFY
		176	# define EV_USE_INOTIFY 0
		177	#endif
		178
		179	#ifndef EV_PID_HASHSIZE
		180	# if EV_MINIMAL
		181	# define EV_PID_HASHSIZE 1
		182	# else
		183	# define EV_PID_HASHSIZE 16
		184	# endif
		185	#endif
		186
		187	#ifndef EV_INOTIFY_HASHSIZE
		188	# if EV_MINIMAL
		189	# define EV_INOTIFY_HASHSIZE 1
		190	# else
		191	# define EV_INOTIFY_HASHSIZE 16
		192	# endif
		193	#endif
		194
161	/**/	195	/**/
162		196
163	#ifndef CLOCK_MONOTONIC	197	#ifndef CLOCK_MONOTONIC
164	# undef EV_USE_MONOTONIC	198	# undef EV_USE_MONOTONIC
165	# define EV_USE_MONOTONIC 0	199	# define EV_USE_MONOTONIC 0
…		…
172		206
173	#if EV_SELECT_IS_WINSOCKET	207	#if EV_SELECT_IS_WINSOCKET
174	# include <winsock.h>	208	# include <winsock.h>
175	#endif	209	#endif
176		210
		211	#if !EV_STAT_ENABLE
		212	# define EV_USE_INOTIFY 0
		213	#endif
		214
		215	#if EV_USE_INOTIFY
		216	# include <sys/inotify.h>
		217	#endif
		218
177	/**/	219	/**/
		220
		221	/*
		222	* This is used to avoid floating point rounding problems.
		223	* It is added to ev_rt_now when scheduling periodics
		224	* to ensure progress, time-wise, even when rounding
		225	* errors are against us.
		226	* This value is good at least till the year 4000.
		227	* Better solutions welcome.
		228	*/
		229	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
178		230
179	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	231	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
180	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	232	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
181	#define PID_HASHSIZE 16 /* size of pid hash table, must be power of two */
182	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds */	233	/*#define CLEANUP_INTERVAL (MAX_BLOCKTIME * 5.) /* how often to try to free memory and re-check fds, TODO */
183
184	#ifdef EV_H
185	# include EV_H
186	#else
187	# include "ev.h"
188	#endif
189		234
190	#if __GNUC__ >= 3	235	#if __GNUC__ >= 3
191	# define expect(expr,value) __builtin_expect ((expr),(value))	236	# define expect(expr,value) __builtin_expect ((expr),(value))
192	# define inline static inline	237	# define noinline __attribute__ ((noinline))
193	#else	238	#else
194	# define expect(expr,value) (expr)	239	# define expect(expr,value) (expr)
195	# define inline static	240	# define noinline
		241	# if __STDC_VERSION__ < 199901L
		242	# define inline
		243	# endif
196	#endif	244	#endif
197		245
198	#define expect_false(expr) expect ((expr) != 0, 0)	246	#define expect_false(expr) expect ((expr) != 0, 0)
199	#define expect_true(expr) expect ((expr) != 0, 1)	247	#define expect_true(expr) expect ((expr) != 0, 1)
		248	#define inline_size static inline
		249
		250	#if EV_MINIMAL
		251	# define inline_speed static noinline
		252	#else
		253	# define inline_speed static inline
		254	#endif
200		255
201	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	256	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
202	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	257	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
203		258
204	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	259	#define EMPTY /* required for microsofts broken pseudo-c compiler */
205	#define EMPTY2(a,b) /* used to suppress some warnings */	260	#define EMPTY2(a,b) /* used to suppress some warnings */
206		261
207	typedef ev_watcher *W;	262	typedef ev_watcher *W;
208	typedef ev_watcher_list *WL;	263	typedef ev_watcher_list *WL;
209	typedef ev_watcher_time *WT;	264	typedef ev_watcher_time *WT;
…		…
216		271
217	/*****************************************************************************/	272	/*****************************************************************************/
218		273
219	static void (*syserr_cb)(const char *msg);	274	static void (*syserr_cb)(const char *msg);
220		275
		276	void
221	void ev_set_syserr_cb (void (*cb)(const char *msg))	277	ev_set_syserr_cb (void (*cb)(const char *msg))
222	{	278	{
223	syserr_cb = cb;	279	syserr_cb = cb;
224	}	280	}
225		281
226	static void	282	static void noinline
227	syserr (const char *msg)	283	syserr (const char *msg)
228	{	284	{
229	if (!msg)	285	if (!msg)
230	msg = "(libev) system error";	286	msg = "(libev) system error";
231		287
…		…
238	}	294	}
239	}	295	}
240		296
241	static void *(*alloc)(void *ptr, long size);	297	static void *(*alloc)(void *ptr, long size);
242		298
		299	void
243	void ev_set_allocator (void *(*cb)(void *ptr, long size))	300	ev_set_allocator (void *(*cb)(void *ptr, long size))
244	{	301	{
245	alloc = cb;	302	alloc = cb;
246	}	303	}
247		304
248	static void *	305	inline_speed void *
249	ev_realloc (void *ptr, long size)	306	ev_realloc (void *ptr, long size)
250	{	307	{
251	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
252		309
253	if (!ptr && size)	310	if (!ptr && size)
…		…
277	typedef struct	334	typedef struct
278	{	335	{
279	W w;	336	W w;
280	int events;	337	int events;
281	} ANPENDING;	338	} ANPENDING;
		339
		340	#if EV_USE_INOTIFY
		341	typedef struct
		342	{
		343	WL head;
		344	} ANFS;
		345	#endif
282		346
283	#if EV_MULTIPLICITY	347	#if EV_MULTIPLICITY
284		348
285	struct ev_loop	349	struct ev_loop
286	{	350	{
…		…
320	gettimeofday (&tv, 0);	384	gettimeofday (&tv, 0);
321	return tv.tv_sec + tv.tv_usec * 1e-6;	385	return tv.tv_sec + tv.tv_usec * 1e-6;
322	#endif	386	#endif
323	}	387	}
324		388
325	inline ev_tstamp	389	ev_tstamp inline_size
326	get_clock (void)	390	get_clock (void)
327	{	391	{
328	#if EV_USE_MONOTONIC	392	#if EV_USE_MONOTONIC
329	if (expect_true (have_monotonic))	393	if (expect_true (have_monotonic))
330	{	394	{
…		…
343	{	407	{
344	return ev_rt_now;	408	return ev_rt_now;
345	}	409	}
346	#endif	410	#endif
347		411
348	#define array_roundsize(type,n) (((n) | 4) & ~3)	412	int inline_size
		413	array_nextsize (int elem, int cur, int cnt)
		414	{
		415	int ncur = cur + 1;
		416
		417	do
		418	ncur <<= 1;
		419	while (cnt > ncur);
		420
		421	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */
		422	if (elem * ncur > 4096)
		423	{
		424	ncur *= elem;
		425	ncur = (ncur + elem + 4095 + sizeof (void *) * 4) & ~4095;
		426	ncur = ncur - sizeof (void *) * 4;
		427	ncur /= elem;
		428	}
		429
		430	return ncur;
		431	}
		432
		433	static noinline void *
		434	array_realloc (int elem, void *base, int *cur, int cnt)
		435	{
		436	*cur = array_nextsize (elem, *cur, cnt);
		437	return ev_realloc (base, elem * *cur);
		438	}
349		439
350	#define array_needsize(type,base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
351	if (expect_false ((cnt) > cur)) \	441	if (expect_false ((cnt) > (cur))) \
352	{ \	442	{ \
353	int newcnt = cur; \	443	int ocur_ = (cur); \
354	do \	444	(base) = (type *)array_realloc \
355	{ \	445	(sizeof (type), (base), &(cur), (cnt)); \
356	newcnt = array_roundsize (type, newcnt << 1); \	446	init ((base) + (ocur_), (cur) - ocur_); \
357	} \
358	while ((cnt) > newcnt); \
359	\
360	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
361	init (base + cur, newcnt - cur); \
362	cur = newcnt; \
363	}	447	}
364		448
		449	#if 0
365	#define array_slim(type,stem) \	450	#define array_slim(type,stem) \
366	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
367	{ \	452	{ \
368	stem ## max = array_roundsize (stem ## cnt >> 1); \	453	stem ## max = array_roundsize (stem ## cnt >> 1); \
369	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
370	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
371	}	456	}
		457	#endif
372		458
373	#define array_free(stem, idx) \	459	#define array_free(stem, idx) \
374	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;	460	ev_free (stem ## s idx); stem ## cnt idx = stem ## max idx = 0;
375		461
376	/*****************************************************************************/	462	/*****************************************************************************/
377		463
378	static void	464	void noinline
		465	ev_feed_event (EV_P_ void *w, int revents)
		466	{
		467	W w_ = (W)w;
		468	int pri = ABSPRI (w_);
		469
		470	if (expect_false (w_->pending))
		471	pendings [pri][w_->pending - 1].events |= revents;
		472	else
		473	{
		474	w_->pending = ++pendingcnt [pri];
		475	array_needsize (ANPENDING, pendings [pri], pendingmax [pri], w_->pending, EMPTY2);
		476	pendings [pri][w_->pending - 1].w = w_;
		477	pendings [pri][w_->pending - 1].events = revents;
		478	}
		479	}
		480
		481	void inline_speed
		482	queue_events (EV_P_ W *events, int eventcnt, int type)
		483	{
		484	int i;
		485
		486	for (i = 0; i < eventcnt; ++i)
		487	ev_feed_event (EV_A_ events [i], type);
		488	}
		489
		490	/*****************************************************************************/
		491
		492	void inline_size
379	anfds_init (ANFD *base, int count)	493	anfds_init (ANFD *base, int count)
380	{	494	{
381	while (count--)	495	while (count--)
382	{	496	{
383	base->head = 0;	497	base->head = 0;
…		…
386		500
387	++base;	501	++base;
388	}	502	}
389	}	503	}
390		504
391	void	505	void inline_speed
392	ev_feed_event (EV_P_ void *w, int revents)
393	{
394	W w_ = (W)w;
395
396	if (expect_false (w_->pending))
397	{
398	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;
399	return;
400	}
401
402	w_->pending = ++pendingcnt [ABSPRI (w_)];
403	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
404	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
405	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
406	}
407
408	static void
409	queue_events (EV_P_ W *events, int eventcnt, int type)
410	{
411	int i;
412
413	for (i = 0; i < eventcnt; ++i)
414	ev_feed_event (EV_A_ events [i], type);
415	}
416
417	inline void
418	fd_event (EV_P_ int fd, int revents)	506	fd_event (EV_P_ int fd, int revents)
419	{	507	{
420	ANFD *anfd = anfds + fd;	508	ANFD *anfd = anfds + fd;
421	ev_io *w;	509	ev_io *w;
422		510
…		…
430	}	518	}
431		519
432	void	520	void
433	ev_feed_fd_event (EV_P_ int fd, int revents)	521	ev_feed_fd_event (EV_P_ int fd, int revents)
434	{	522	{
		523	if (fd >= 0 && fd < anfdmax)
435	fd_event (EV_A_ fd, revents);	524	fd_event (EV_A_ fd, revents);
436	}	525	}
437		526
438	/*****************************************************************************/	527	void inline_size
439
440	inline void
441	fd_reify (EV_P)	528	fd_reify (EV_P)
442	{	529	{
443	int i;	530	int i;
444		531
445	for (i = 0; i < fdchangecnt; ++i)	532	for (i = 0; i < fdchangecnt; ++i)
…		…
469	}	556	}
470		557
471	fdchangecnt = 0;	558	fdchangecnt = 0;
472	}	559	}
473		560
474	static void	561	void inline_size
475	fd_change (EV_P_ int fd)	562	fd_change (EV_P_ int fd)
476	{	563	{
477	if (expect_false (anfds [fd].reify))	564	if (expect_false (anfds [fd].reify))
478	return;	565	return;
479		566
…		…
482	++fdchangecnt;	569	++fdchangecnt;
483	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
484	fdchanges [fdchangecnt - 1] = fd;	571	fdchanges [fdchangecnt - 1] = fd;
485	}	572	}
486		573
487	static void	574	void inline_speed
488	fd_kill (EV_P_ int fd)	575	fd_kill (EV_P_ int fd)
489	{	576	{
490	ev_io *w;	577	ev_io *w;
491		578
492	while ((w = (ev_io *)anfds [fd].head))	579	while ((w = (ev_io *)anfds [fd].head))
…		…
494	ev_io_stop (EV_A_ w);	581	ev_io_stop (EV_A_ w);
495	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);	582	ev_feed_event (EV_A_ (W)w, EV_ERROR | EV_READ | EV_WRITE);
496	}	583	}
497	}	584	}
498		585
499	inline int	586	int inline_size
500	fd_valid (int fd)	587	fd_valid (int fd)
501	{	588	{
502	#ifdef _WIN32	589	#ifdef _WIN32
503	return _get_osfhandle (fd) != -1;	590	return _get_osfhandle (fd) != -1;
504	#else	591	#else
505	return fcntl (fd, F_GETFD) != -1;	592	return fcntl (fd, F_GETFD) != -1;
506	#endif	593	#endif
507	}	594	}
508		595
509	/* called on EBADF to verify fds */	596	/* called on EBADF to verify fds */
510	static void	597	static void noinline
511	fd_ebadf (EV_P)	598	fd_ebadf (EV_P)
512	{	599	{
513	int fd;	600	int fd;
514		601
515	for (fd = 0; fd < anfdmax; ++fd)	602	for (fd = 0; fd < anfdmax; ++fd)
…		…
517	if (!fd_valid (fd) == -1 && errno == EBADF)	604	if (!fd_valid (fd) == -1 && errno == EBADF)
518	fd_kill (EV_A_ fd);	605	fd_kill (EV_A_ fd);
519	}	606	}
520		607
521	/* called on ENOMEM in select/poll to kill some fds and retry */	608	/* called on ENOMEM in select/poll to kill some fds and retry */
522	static void	609	static void noinline
523	fd_enomem (EV_P)	610	fd_enomem (EV_P)
524	{	611	{
525	int fd;	612	int fd;
526		613
527	for (fd = anfdmax; fd--; )	614	for (fd = anfdmax; fd--; )
…		…
531	return;	618	return;
532	}	619	}
533	}	620	}
534		621
535	/* usually called after fork if backend needs to re-arm all fds from scratch */	622	/* usually called after fork if backend needs to re-arm all fds from scratch */
536	static void	623	static void noinline
537	fd_rearm_all (EV_P)	624	fd_rearm_all (EV_P)
538	{	625	{
539	int fd;	626	int fd;
540		627
541	/* this should be highly optimised to not do anything but set a flag */
542	for (fd = 0; fd < anfdmax; ++fd)	628	for (fd = 0; fd < anfdmax; ++fd)
543	if (anfds [fd].events)	629	if (anfds [fd].events)
544	{	630	{
545	anfds [fd].events = 0;	631	anfds [fd].events = 0;
546	fd_change (EV_A_ fd);	632	fd_change (EV_A_ fd);
547	}	633	}
548	}	634	}
549		635
550	/*****************************************************************************/	636	/*****************************************************************************/
551		637
552	static void	638	void inline_speed
553	upheap (WT *heap, int k)	639	upheap (WT *heap, int k)
554	{	640	{
555	WT w = heap [k];	641	WT w = heap [k];
556		642
557	while (k && heap [k >> 1]->at > w->at)	643	while (k)
558	{	644	{
		645	int p = (k - 1) >> 1;
		646
		647	if (heap [p]->at <= w->at)
		648	break;
		649
559	heap [k] = heap [k >> 1];	650	heap [k] = heap [p];
560	((W)heap [k])->active = k + 1;	651	((W)heap [k])->active = k + 1;
561	k >>= 1;	652	k = p;
562	}	653	}
563		654
564	heap [k] = w;	655	heap [k] = w;
565	((W)heap [k])->active = k + 1;	656	((W)heap [k])->active = k + 1;
566
567	}	657	}
568		658
569	static void	659	void inline_speed
570	downheap (WT *heap, int N, int k)	660	downheap (WT *heap, int N, int k)
571	{	661	{
572	WT w = heap [k];	662	WT w = heap [k];
573		663
574	while (k < (N >> 1))	664	for (;;)
575	{	665	{
576	int j = k << 1;	666	int c = (k << 1) + 1;
577		667
578	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	668	if (c >= N)
579	++j;
580
581	if (w->at <= heap [j]->at)
582	break;	669	break;
583		670
		671	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		672	? 1 : 0;
		673
		674	if (w->at <= heap [c]->at)
		675	break;
		676
584	heap [k] = heap [j];	677	heap [k] = heap [c];
585	((W)heap [k])->active = k + 1;	678	((W)heap [k])->active = k + 1;
		679
586	k = j;	680	k = c;
587	}	681	}
588		682
589	heap [k] = w;	683	heap [k] = w;
590	((W)heap [k])->active = k + 1;	684	((W)heap [k])->active = k + 1;
591	}	685	}
592		686
593	inline void	687	void inline_size
594	adjustheap (WT *heap, int N, int k)	688	adjustheap (WT *heap, int N, int k)
595	{	689	{
596	upheap (heap, k);	690	upheap (heap, k);
597	downheap (heap, N, k);	691	downheap (heap, N, k);
598	}	692	}
…		…
610		704
611	static int sigpipe [2];	705	static int sigpipe [2];
612	static sig_atomic_t volatile gotsig;	706	static sig_atomic_t volatile gotsig;
613	static ev_io sigev;	707	static ev_io sigev;
614		708
615	static void	709	void inline_size
616	signals_init (ANSIG *base, int count)	710	signals_init (ANSIG *base, int count)
617	{	711	{
618	while (count--)	712	while (count--)
619	{	713	{
620	base->head = 0;	714	base->head = 0;
…		…
640	write (sigpipe [1], &signum, 1);	734	write (sigpipe [1], &signum, 1);
641	errno = old_errno;	735	errno = old_errno;
642	}	736	}
643	}	737	}
644		738
645	void	739	void noinline
646	ev_feed_signal_event (EV_P_ int signum)	740	ev_feed_signal_event (EV_P_ int signum)
647	{	741	{
648	WL w;	742	WL w;
649		743
650	#if EV_MULTIPLICITY	744	#if EV_MULTIPLICITY
…		…
673	for (signum = signalmax; signum--; )	767	for (signum = signalmax; signum--; )
674	if (signals [signum].gotsig)	768	if (signals [signum].gotsig)
675	ev_feed_signal_event (EV_A_ signum + 1);	769	ev_feed_signal_event (EV_A_ signum + 1);
676	}	770	}
677		771
678	static void	772	void inline_speed
679	fd_intern (int fd)	773	fd_intern (int fd)
680	{	774	{
681	#ifdef _WIN32	775	#ifdef _WIN32
682	int arg = 1;	776	int arg = 1;
683	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	777	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
685	fcntl (fd, F_SETFD, FD_CLOEXEC);	779	fcntl (fd, F_SETFD, FD_CLOEXEC);
686	fcntl (fd, F_SETFL, O_NONBLOCK);	780	fcntl (fd, F_SETFL, O_NONBLOCK);
687	#endif	781	#endif
688	}	782	}
689		783
690	static void	784	static void noinline
691	siginit (EV_P)	785	siginit (EV_P)
692	{	786	{
693	fd_intern (sigpipe [0]);	787	fd_intern (sigpipe [0]);
694	fd_intern (sigpipe [1]);	788	fd_intern (sigpipe [1]);
695		789
…		…
698	ev_unref (EV_A); /* child watcher should not keep loop alive */	792	ev_unref (EV_A); /* child watcher should not keep loop alive */
699	}	793	}
700		794
701	/*****************************************************************************/	795	/*****************************************************************************/
702		796
703	static ev_child *childs [PID_HASHSIZE];	797	static ev_child *childs [EV_PID_HASHSIZE];
704		798
705	#ifndef _WIN32	799	#ifndef _WIN32
706		800
707	static ev_signal childev;	801	static ev_signal childev;
		802
		803	void inline_speed
		804	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		805	{
		806	ev_child *w;
		807
		808	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		809	if (w->pid == pid || !w->pid)
		810	{
		811	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		812	w->rpid = pid;
		813	w->rstatus = status;
		814	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		815	}
		816	}
708		817
709	#ifndef WCONTINUED	818	#ifndef WCONTINUED
710	# define WCONTINUED 0	819	# define WCONTINUED 0
711	#endif	820	#endif
712		821
713	static void	822	static void
714	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
715	{
716	ev_child *w;
717
718	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
719	if (w->pid == pid || !w->pid)
720	{
721	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
722	w->rpid = pid;
723	w->rstatus = status;
724	ev_feed_event (EV_A_ (W)w, EV_CHILD);
725	}
726	}
727
728	static void
729	childcb (EV_P_ ev_signal *sw, int revents)	823	childcb (EV_P_ ev_signal *sw, int revents)
730	{	824	{
731	int pid, status;	825	int pid, status;
732		826
		827	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
733	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	828	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
734	{	829	if (!WCONTINUED
		830	|| errno != EINVAL
		831	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		832	return;
		833
735	/* make sure we are called again until all childs have been reaped */	834	/* make sure we are called again until all childs have been reaped */
736	/* we need to do it this way so that the callback gets called before we continue */	835	/* we need to do it this way so that the callback gets called before we continue */
737	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	836	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
738		837
739	child_reap (EV_A_ sw, pid, pid, status);	838	child_reap (EV_A_ sw, pid, pid, status);
		839	if (EV_PID_HASHSIZE > 1)
740	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	840	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
741	}
742	}	841	}
743		842
744	#endif	843	#endif
745		844
746	/*****************************************************************************/	845	/*****************************************************************************/
…		…
772	{	871	{
773	return EV_VERSION_MINOR;	872	return EV_VERSION_MINOR;
774	}	873	}
775		874
776	/* return true if we are running with elevated privileges and should ignore env variables */	875	/* return true if we are running with elevated privileges and should ignore env variables */
777	static int	876	int inline_size
778	enable_secure (void)	877	enable_secure (void)
779	{	878	{
780	#ifdef _WIN32	879	#ifdef _WIN32
781	return 0;	880	return 0;
782	#else	881	#else
…		…
829	ev_backend (EV_P)	928	ev_backend (EV_P)
830	{	929	{
831	return backend;	930	return backend;
832	}	931	}
833		932
834	static void	933	unsigned int
		934	ev_loop_count (EV_P)
		935	{
		936	return loop_count;
		937	}
		938
		939	static void noinline
835	loop_init (EV_P_ unsigned int flags)	940	loop_init (EV_P_ unsigned int flags)
836	{	941	{
837	if (!backend)	942	if (!backend)
838	{	943	{
839	#if EV_USE_MONOTONIC	944	#if EV_USE_MONOTONIC
…		…
847	ev_rt_now = ev_time ();	952	ev_rt_now = ev_time ();
848	mn_now = get_clock ();	953	mn_now = get_clock ();
849	now_floor = mn_now;	954	now_floor = mn_now;
850	rtmn_diff = ev_rt_now - mn_now;	955	rtmn_diff = ev_rt_now - mn_now;
851		956
		957	/* pid check not overridable via env */
		958	#ifndef _WIN32
		959	if (flags & EVFLAG_FORKCHECK)
		960	curpid = getpid ();
		961	#endif
		962
852	if (!(flags & EVFLAG_NOENV)	963	if (!(flags & EVFLAG_NOENV)
853	&& !enable_secure ()	964	&& !enable_secure ()
854	&& getenv ("LIBEV_FLAGS"))	965	&& getenv ("LIBEV_FLAGS"))
855	flags = atoi (getenv ("LIBEV_FLAGS"));	966	flags = atoi (getenv ("LIBEV_FLAGS"));
856		967
857	if (!(flags & 0x0000ffffUL))	968	if (!(flags & 0x0000ffffUL))
858	flags |= ev_recommended_backends ();	969	flags |= ev_recommended_backends ();
859		970
860	backend = 0;	971	backend = 0;
		972	backend_fd = -1;
		973	#if EV_USE_INOTIFY
		974	fs_fd = -2;
		975	#endif
		976
861	#if EV_USE_PORT	977	#if EV_USE_PORT
862	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	978	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
863	#endif	979	#endif
864	#if EV_USE_KQUEUE	980	#if EV_USE_KQUEUE
865	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	981	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
877	ev_init (&sigev, sigcb);	993	ev_init (&sigev, sigcb);
878	ev_set_priority (&sigev, EV_MAXPRI);	994	ev_set_priority (&sigev, EV_MAXPRI);
879	}	995	}
880	}	996	}
881		997
882	static void	998	static void noinline
883	loop_destroy (EV_P)	999	loop_destroy (EV_P)
884	{	1000	{
885	int i;	1001	int i;
		1002
		1003	#if EV_USE_INOTIFY
		1004	if (fs_fd >= 0)
		1005	close (fs_fd);
		1006	#endif
		1007
		1008	if (backend_fd >= 0)
		1009	close (backend_fd);
886		1010
887	#if EV_USE_PORT	1011	#if EV_USE_PORT
888	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1012	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
889	#endif	1013	#endif
890	#if EV_USE_KQUEUE	1014	#if EV_USE_KQUEUE
…		…
899	#if EV_USE_SELECT	1023	#if EV_USE_SELECT
900	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);	1024	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
901	#endif	1025	#endif
902		1026
903	for (i = NUMPRI; i--; )	1027	for (i = NUMPRI; i--; )
		1028	{
904	array_free (pending, [i]);	1029	array_free (pending, [i]);
		1030	#if EV_IDLE_ENABLE
		1031	array_free (idle, [i]);
		1032	#endif
		1033	}
905		1034
906	/* have to use the microsoft-never-gets-it-right macro */	1035	/* have to use the microsoft-never-gets-it-right macro */
907	array_free (fdchange, EMPTY0);	1036	array_free (fdchange, EMPTY);
908	array_free (timer, EMPTY0);	1037	array_free (timer, EMPTY);
909	#if EV_PERIODICS	1038	#if EV_PERIODIC_ENABLE
910	array_free (periodic, EMPTY0);	1039	array_free (periodic, EMPTY);
911	#endif	1040	#endif
912	array_free (idle, EMPTY0);
913	array_free (prepare, EMPTY0);	1041	array_free (prepare, EMPTY);
914	array_free (check, EMPTY0);	1042	array_free (check, EMPTY);
915		1043
916	backend = 0;	1044	backend = 0;
917	}	1045	}
918		1046
919	static void	1047	void inline_size infy_fork (EV_P);
		1048
		1049	void inline_size
920	loop_fork (EV_P)	1050	loop_fork (EV_P)
921	{	1051	{
922	#if EV_USE_PORT	1052	#if EV_USE_PORT
923	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1053	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
924	#endif	1054	#endif
925	#if EV_USE_KQUEUE	1055	#if EV_USE_KQUEUE
926	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);	1056	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
927	#endif	1057	#endif
928	#if EV_USE_EPOLL	1058	#if EV_USE_EPOLL
929	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);	1059	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1060	#endif
		1061	#if EV_USE_INOTIFY
		1062	infy_fork (EV_A);
930	#endif	1063	#endif
931		1064
932	if (ev_is_active (&sigev))	1065	if (ev_is_active (&sigev))
933	{	1066	{
934	/* default loop */	1067	/* default loop */
…		…
1050	postfork = 1;	1183	postfork = 1;
1051	}	1184	}
1052		1185
1053	/*****************************************************************************/	1186	/*****************************************************************************/
1054		1187
1055	static int	1188	void
1056	any_pending (EV_P)	1189	ev_invoke (EV_P_ void *w, int revents)
1057	{	1190	{
1058	int pri;	1191	EV_CB_INVOKE ((W)w, revents);
1059
1060	for (pri = NUMPRI; pri--; )
1061	if (pendingcnt [pri])
1062	return 1;
1063
1064	return 0;
1065	}	1192	}
1066		1193
1067	inline void	1194	void inline_speed
1068	call_pending (EV_P)	1195	call_pending (EV_P)
1069	{	1196	{
1070	int pri;	1197	int pri;
1071		1198
1072	for (pri = NUMPRI; pri--; )	1199	for (pri = NUMPRI; pri--; )
…		…
1074	{	1201	{
1075	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1202	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1076		1203
1077	if (expect_true (p->w))	1204	if (expect_true (p->w))
1078	{	1205	{
1079	assert (("non-pending watcher on pending list", p->w->pending));	1206	/*assert (("non-pending watcher on pending list", p->w->pending));*/
1080		1207
1081	p->w->pending = 0;	1208	p->w->pending = 0;
1082	EV_CB_INVOKE (p->w, p->events);	1209	EV_CB_INVOKE (p->w, p->events);
1083	}	1210	}
1084	}	1211	}
1085	}	1212	}
1086		1213
1087	inline void	1214	void inline_size
1088	timers_reify (EV_P)	1215	timers_reify (EV_P)
1089	{	1216	{
1090	while (timercnt && ((WT)timers [0])->at <= mn_now)	1217	while (timercnt && ((WT)timers [0])->at <= mn_now)
1091	{	1218	{
1092	ev_timer *w = timers [0];	1219	ev_timer *w = (ev_timer *)timers [0];
1093		1220
1094	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1221	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1095		1222
1096	/* first reschedule or stop timer */	1223	/* first reschedule or stop timer */
1097	if (w->repeat)	1224	if (w->repeat)
1098	{	1225	{
1099	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1226	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1100		1227
1101	((WT)w)->at += w->repeat;	1228	((WT)w)->at += w->repeat;
1102	if (((WT)w)->at < mn_now)	1229	if (((WT)w)->at < mn_now)
1103	((WT)w)->at = mn_now;	1230	((WT)w)->at = mn_now;
1104		1231
1105	downheap ((WT *)timers, timercnt, 0);	1232	downheap (timers, timercnt, 0);
1106	}	1233	}
1107	else	1234	else
1108	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */	1235	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1109		1236
1110	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);	1237	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1111	}	1238	}
1112	}	1239	}
1113		1240
1114	#if EV_PERIODICS	1241	#if EV_PERIODIC_ENABLE
1115	inline void	1242	void inline_size
1116	periodics_reify (EV_P)	1243	periodics_reify (EV_P)
1117	{	1244	{
1118	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1245	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1119	{	1246	{
1120	ev_periodic *w = periodics [0];	1247	ev_periodic *w = (ev_periodic *)periodics [0];
1121		1248
1122	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1249	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1123		1250
1124	/* first reschedule or stop timer */	1251	/* first reschedule or stop timer */
1125	if (w->reschedule_cb)	1252	if (w->reschedule_cb)
1126	{	1253	{
1127	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1254	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1128	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1255	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1129	downheap ((WT *)periodics, periodiccnt, 0);	1256	downheap (periodics, periodiccnt, 0);
1130	}	1257	}
1131	else if (w->interval)	1258	else if (w->interval)
1132	{	1259	{
1133	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1260	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1261	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1134	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1262	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1135	downheap ((WT *)periodics, periodiccnt, 0);	1263	downheap (periodics, periodiccnt, 0);
1136	}	1264	}
1137	else	1265	else
1138	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1266	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1139		1267
1140	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);	1268	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1141	}	1269	}
1142	}	1270	}
1143		1271
1144	static void	1272	static void noinline
1145	periodics_reschedule (EV_P)	1273	periodics_reschedule (EV_P)
1146	{	1274	{
1147	int i;	1275	int i;
1148		1276
1149	/* adjust periodics after time jump */	1277	/* adjust periodics after time jump */
1150	for (i = 0; i < periodiccnt; ++i)	1278	for (i = 0; i < periodiccnt; ++i)
1151	{	1279	{
1152	ev_periodic *w = periodics [i];	1280	ev_periodic *w = (ev_periodic *)periodics [i];
1153		1281
1154	if (w->reschedule_cb)	1282	if (w->reschedule_cb)
1155	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1283	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1156	else if (w->interval)	1284	else if (w->interval)
1157	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1285	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1158	}	1286	}
1159		1287
1160	/* now rebuild the heap */	1288	/* now rebuild the heap */
1161	for (i = periodiccnt >> 1; i--; )	1289	for (i = periodiccnt >> 1; i--; )
1162	downheap ((WT *)periodics, periodiccnt, i);	1290	downheap (periodics, periodiccnt, i);
1163	}	1291	}
1164	#endif	1292	#endif
1165		1293
1166	inline int	1294	#if EV_IDLE_ENABLE
1167	time_update_monotonic (EV_P)	1295	void inline_size
		1296	idle_reify (EV_P)
1168	{	1297	{
		1298	if (expect_false (idleall))
		1299	{
		1300	int pri;
		1301
		1302	for (pri = NUMPRI; pri--; )
		1303	{
		1304	if (pendingcnt [pri])
		1305	break;
		1306
		1307	if (idlecnt [pri])
		1308	{
		1309	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1310	break;
		1311	}
		1312	}
		1313	}
		1314	}
		1315	#endif
		1316
		1317	void inline_speed
		1318	time_update (EV_P_ ev_tstamp max_block)
		1319	{
		1320	int i;
		1321
		1322	#if EV_USE_MONOTONIC
		1323	if (expect_true (have_monotonic))
		1324	{
		1325	ev_tstamp odiff = rtmn_diff;
		1326
1169	mn_now = get_clock ();	1327	mn_now = get_clock ();
1170		1328
		1329	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1330	/* interpolate in the meantime */
1171	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1331	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1172	{	1332	{
1173	ev_rt_now = rtmn_diff + mn_now;	1333	ev_rt_now = rtmn_diff + mn_now;
1174	return 0;	1334	return;
1175	}	1335	}
1176	else	1336
1177	{
1178	now_floor = mn_now;	1337	now_floor = mn_now;
1179	ev_rt_now = ev_time ();	1338	ev_rt_now = ev_time ();
1180	return 1;
1181	}
1182	}
1183		1339
1184	inline void	1340	/* loop a few times, before making important decisions.
1185	time_update (EV_P)	1341	* on the choice of "4": one iteration isn't enough,
1186	{	1342	* in case we get preempted during the calls to
1187	int i;	1343	* ev_time and get_clock. a second call is almost guaranteed
1188		1344	* to succeed in that case, though. and looping a few more times
1189	#if EV_USE_MONOTONIC	1345	* doesn't hurt either as we only do this on time-jumps or
1190	if (expect_true (have_monotonic))	1346	* in the unlikely event of having been preempted here.
1191	{	1347	*/
1192	if (time_update_monotonic (EV_A))	1348	for (i = 4; --i; )
1193	{	1349	{
1194	ev_tstamp odiff = rtmn_diff;
1195
1196	/* loop a few times, before making important decisions.
1197	* on the choice of "4": one iteration isn't enough,
1198	* in case we get preempted during the calls to
1199	* ev_time and get_clock. a second call is almost guarenteed
1200	* to succeed in that case, though. and looping a few more times
1201	* doesn't hurt either as we only do this on time-jumps or
1202	* in the unlikely event of getting preempted here.
1203	*/
1204	for (i = 4; --i; )
1205	{
1206	rtmn_diff = ev_rt_now - mn_now;	1350	rtmn_diff = ev_rt_now - mn_now;
1207		1351
1208	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1352	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1209	return; /* all is well */	1353	return; /* all is well */
1210		1354
1211	ev_rt_now = ev_time ();	1355	ev_rt_now = ev_time ();
1212	mn_now = get_clock ();	1356	mn_now = get_clock ();
1213	now_floor = mn_now;	1357	now_floor = mn_now;
1214	}	1358	}
1215		1359
1216	# if EV_PERIODICS	1360	# if EV_PERIODIC_ENABLE
		1361	periodics_reschedule (EV_A);
		1362	# endif
		1363	/* no timer adjustment, as the monotonic clock doesn't jump */
		1364	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
		1365	}
		1366	else
		1367	#endif
		1368	{
		1369	ev_rt_now = ev_time ();
		1370
		1371	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
		1372	{
		1373	#if EV_PERIODIC_ENABLE
1217	periodics_reschedule (EV_A);	1374	periodics_reschedule (EV_A);
1218	# endif	1375	#endif
1219	/* no timer adjustment, as the monotonic clock doesn't jump */
1220	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1221	}
1222	}
1223	else
1224	#endif
1225	{
1226	ev_rt_now = ev_time ();
1227
1228	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))
1229	{
1230	#if EV_PERIODICS
1231	periodics_reschedule (EV_A);
1232	#endif
1233
1234	/* adjust timers. this is easy, as the offset is the same for all */	1376	/* adjust timers. this is easy, as the offset is the same for all of them */
1235	for (i = 0; i < timercnt; ++i)	1377	for (i = 0; i < timercnt; ++i)
1236	((WT)timers [i])->at += ev_rt_now - mn_now;	1378	((WT)timers [i])->at += ev_rt_now - mn_now;
1237	}	1379	}
1238		1380
1239	mn_now = ev_rt_now;	1381	mn_now = ev_rt_now;
…		…
1259	{	1401	{
1260	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	1402	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1261	? EVUNLOOP_ONE	1403	? EVUNLOOP_ONE
1262	: EVUNLOOP_CANCEL;	1404	: EVUNLOOP_CANCEL;
1263		1405
1264	while (activecnt)	1406	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1407
		1408	do
1265	{	1409	{
		1410	#ifndef _WIN32
		1411	if (expect_false (curpid)) /* penalise the forking check even more */
		1412	if (expect_false (getpid () != curpid))
		1413	{
		1414	curpid = getpid ();
		1415	postfork = 1;
		1416	}
		1417	#endif
		1418
		1419	#if EV_FORK_ENABLE
		1420	/* we might have forked, so queue fork handlers */
		1421	if (expect_false (postfork))
		1422	if (forkcnt)
		1423	{
		1424	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1425	call_pending (EV_A);
		1426	}
		1427	#endif
		1428
1266	/* queue check watchers (and execute them) */	1429	/* queue prepare watchers (and execute them) */
1267	if (expect_false (preparecnt))	1430	if (expect_false (preparecnt))
1268	{	1431	{
1269	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1432	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1270	call_pending (EV_A);	1433	call_pending (EV_A);
1271	}	1434	}
1272		1435
		1436	if (expect_false (!activecnt))
		1437	break;
		1438
1273	/* we might have forked, so reify kernel state if necessary */	1439	/* we might have forked, so reify kernel state if necessary */
1274	if (expect_false (postfork))	1440	if (expect_false (postfork))
1275	loop_fork (EV_A);	1441	loop_fork (EV_A);
1276		1442
1277	/* update fd-related kernel structures */	1443	/* update fd-related kernel structures */
1278	fd_reify (EV_A);	1444	fd_reify (EV_A);
1279		1445
1280	/* calculate blocking time */	1446	/* calculate blocking time */
1281	{	1447	{
1282	double block;	1448	ev_tstamp block;
1283		1449
1284	if (flags & EVLOOP_NONBLOCK || idlecnt)	1450	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
1285	block = 0.; /* do not block at all */	1451	block = 0.; /* do not block at all */
1286	else	1452	else
1287	{	1453	{
1288	/* update time to cancel out callback processing overhead */	1454	/* update time to cancel out callback processing overhead */
1289	#if EV_USE_MONOTONIC
1290	if (expect_true (have_monotonic))
1291	time_update_monotonic (EV_A);	1455	time_update (EV_A_ 1e100);
1292	else
1293	#endif
1294	{
1295	ev_rt_now = ev_time ();
1296	mn_now = ev_rt_now;
1297	}
1298		1456
1299	block = MAX_BLOCKTIME;	1457	block = MAX_BLOCKTIME;
1300		1458
1301	if (timercnt)	1459	if (timercnt)
1302	{	1460	{
1303	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1461	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;
1304	if (block > to) block = to;	1462	if (block > to) block = to;
1305	}	1463	}
1306		1464
1307	#if EV_PERIODICS	1465	#if EV_PERIODIC_ENABLE
1308	if (periodiccnt)	1466	if (periodiccnt)
1309	{	1467	{
1310	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1468	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;
1311	if (block > to) block = to;	1469	if (block > to) block = to;
1312	}	1470	}
1313	#endif	1471	#endif
1314		1472
1315	if (expect_false (block < 0.)) block = 0.;	1473	if (expect_false (block < 0.)) block = 0.;
1316	}	1474	}
1317		1475
		1476	++loop_count;
1318	backend_poll (EV_A_ block);	1477	backend_poll (EV_A_ block);
		1478
		1479	/* update ev_rt_now, do magic */
		1480	time_update (EV_A_ block);
1319	}	1481	}
1320
1321	/* update ev_rt_now, do magic */
1322	time_update (EV_A);
1323		1482
1324	/* queue pending timers and reschedule them */	1483	/* queue pending timers and reschedule them */
1325	timers_reify (EV_A); /* relative timers called last */	1484	timers_reify (EV_A); /* relative timers called last */
1326	#if EV_PERIODICS	1485	#if EV_PERIODIC_ENABLE
1327	periodics_reify (EV_A); /* absolute timers called first */	1486	periodics_reify (EV_A); /* absolute timers called first */
1328	#endif	1487	#endif
1329		1488
		1489	#if EV_IDLE_ENABLE
1330	/* queue idle watchers unless other events are pending */	1490	/* queue idle watchers unless other events are pending */
1331	if (idlecnt && !any_pending (EV_A))	1491	idle_reify (EV_A);
1332	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1492	#endif
1333		1493
1334	/* queue check watchers, to be executed first */	1494	/* queue check watchers, to be executed first */
1335	if (expect_false (checkcnt))	1495	if (expect_false (checkcnt))
1336	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1496	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1337		1497
1338	call_pending (EV_A);	1498	call_pending (EV_A);
1339		1499
1340	if (expect_false (loop_done))
1341	break;
1342	}	1500	}
		1501	while (expect_true (activecnt && !loop_done));
1343		1502
1344	if (loop_done == EVUNLOOP_ONE)	1503	if (loop_done == EVUNLOOP_ONE)
1345	loop_done = EVUNLOOP_CANCEL;	1504	loop_done = EVUNLOOP_CANCEL;
1346	}	1505	}
1347		1506
…		…
1351	loop_done = how;	1510	loop_done = how;
1352	}	1511	}
1353		1512
1354	/*****************************************************************************/	1513	/*****************************************************************************/
1355		1514
1356	inline void	1515	void inline_size
1357	wlist_add (WL *head, WL elem)	1516	wlist_add (WL *head, WL elem)
1358	{	1517	{
1359	elem->next = *head;	1518	elem->next = *head;
1360	*head = elem;	1519	*head = elem;
1361	}	1520	}
1362		1521
1363	inline void	1522	void inline_size
1364	wlist_del (WL *head, WL elem)	1523	wlist_del (WL *head, WL elem)
1365	{	1524	{
1366	while (*head)	1525	while (*head)
1367	{	1526	{
1368	if (*head == elem)	1527	if (*head == elem)
…		…
1373		1532
1374	head = &(*head)->next;	1533	head = &(*head)->next;
1375	}	1534	}
1376	}	1535	}
1377		1536
1378	inline void	1537	void inline_speed
1379	ev_clear_pending (EV_P_ W w)	1538	clear_pending (EV_P_ W w)
1380	{	1539	{
1381	if (w->pending)	1540	if (w->pending)
1382	{	1541	{
1383	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1542	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1384	w->pending = 0;	1543	w->pending = 0;
1385	}	1544	}
1386	}	1545	}
1387		1546
1388	inline void	1547	int
		1548	ev_clear_pending (EV_P_ void *w)
		1549	{
		1550	W w_ = (W)w;
		1551	int pending = w_->pending;
		1552
		1553	if (expect_true (pending))
		1554	{
		1555	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1556	w_->pending = 0;
		1557	p->w = 0;
		1558	return p->events;
		1559	}
		1560	else
		1561	return 0;
		1562	}
		1563
		1564	void inline_size
		1565	pri_adjust (EV_P_ W w)
		1566	{
		1567	int pri = w->priority;
		1568	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1569	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1570	w->priority = pri;
		1571	}
		1572
		1573	void inline_speed
1389	ev_start (EV_P_ W w, int active)	1574	ev_start (EV_P_ W w, int active)
1390	{	1575	{
1391	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1576	pri_adjust (EV_A_ w);
1392	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1393
1394	w->active = active;	1577	w->active = active;
1395	ev_ref (EV_A);	1578	ev_ref (EV_A);
1396	}	1579	}
1397		1580
1398	inline void	1581	void inline_size
1399	ev_stop (EV_P_ W w)	1582	ev_stop (EV_P_ W w)
1400	{	1583	{
1401	ev_unref (EV_A);	1584	ev_unref (EV_A);
1402	w->active = 0;	1585	w->active = 0;
1403	}	1586	}
1404		1587
1405	/*****************************************************************************/	1588	/*****************************************************************************/
1406		1589
1407	void	1590	void noinline
1408	ev_io_start (EV_P_ ev_io *w)	1591	ev_io_start (EV_P_ ev_io *w)
1409	{	1592	{
1410	int fd = w->fd;	1593	int fd = w->fd;
1411		1594
1412	if (expect_false (ev_is_active (w)))	1595	if (expect_false (ev_is_active (w)))
…		…
1419	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1602	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1420		1603
1421	fd_change (EV_A_ fd);	1604	fd_change (EV_A_ fd);
1422	}	1605	}
1423		1606
1424	void	1607	void noinline
1425	ev_io_stop (EV_P_ ev_io *w)	1608	ev_io_stop (EV_P_ ev_io *w)
1426	{	1609	{
1427	ev_clear_pending (EV_A_ (W)w);	1610	clear_pending (EV_A_ (W)w);
1428	if (expect_false (!ev_is_active (w)))	1611	if (expect_false (!ev_is_active (w)))
1429	return;	1612	return;
1430		1613
1431	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1614	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1432		1615
…		…
1434	ev_stop (EV_A_ (W)w);	1617	ev_stop (EV_A_ (W)w);
1435		1618
1436	fd_change (EV_A_ w->fd);	1619	fd_change (EV_A_ w->fd);
1437	}	1620	}
1438		1621
1439	void	1622	void noinline
1440	ev_timer_start (EV_P_ ev_timer *w)	1623	ev_timer_start (EV_P_ ev_timer *w)
1441	{	1624	{
1442	if (expect_false (ev_is_active (w)))	1625	if (expect_false (ev_is_active (w)))
1443	return;	1626	return;
1444		1627
1445	((WT)w)->at += mn_now;	1628	((WT)w)->at += mn_now;
1446		1629
1447	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	1630	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1448		1631
1449	ev_start (EV_A_ (W)w, ++timercnt);	1632	ev_start (EV_A_ (W)w, ++timercnt);
1450	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1633	array_needsize (WT, timers, timermax, timercnt, EMPTY2);
1451	timers [timercnt - 1] = w;	1634	timers [timercnt - 1] = (WT)w;
1452	upheap ((WT *)timers, timercnt - 1);	1635	upheap (timers, timercnt - 1);
1453		1636
1454	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1637	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
1455	}	1638	}
1456		1639
1457	void	1640	void noinline
1458	ev_timer_stop (EV_P_ ev_timer *w)	1641	ev_timer_stop (EV_P_ ev_timer *w)
1459	{	1642	{
1460	ev_clear_pending (EV_A_ (W)w);	1643	clear_pending (EV_A_ (W)w);
1461	if (expect_false (!ev_is_active (w)))	1644	if (expect_false (!ev_is_active (w)))
1462	return;	1645	return;
1463		1646
1464	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1647	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == (WT)w));
1465		1648
		1649	{
		1650	int active = ((W)w)->active;
		1651
1466	if (expect_true (((W)w)->active < timercnt--))	1652	if (expect_true (--active < --timercnt))
1467	{	1653	{
1468	timers [((W)w)->active - 1] = timers [timercnt];	1654	timers [active] = timers [timercnt];
1469	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1655	adjustheap (timers, timercnt, active);
1470	}	1656	}
		1657	}
1471		1658
1472	((WT)w)->at -= mn_now;	1659	((WT)w)->at -= mn_now;
1473		1660
1474	ev_stop (EV_A_ (W)w);	1661	ev_stop (EV_A_ (W)w);
1475	}	1662	}
1476		1663
1477	void	1664	void noinline
1478	ev_timer_again (EV_P_ ev_timer *w)	1665	ev_timer_again (EV_P_ ev_timer *w)
1479	{	1666	{
1480	if (ev_is_active (w))	1667	if (ev_is_active (w))
1481	{	1668	{
1482	if (w->repeat)	1669	if (w->repeat)
1483	{	1670	{
1484	((WT)w)->at = mn_now + w->repeat;	1671	((WT)w)->at = mn_now + w->repeat;
1485	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1672	adjustheap (timers, timercnt, ((W)w)->active - 1);
1486	}	1673	}
1487	else	1674	else
1488	ev_timer_stop (EV_A_ w);	1675	ev_timer_stop (EV_A_ w);
1489	}	1676	}
1490	else if (w->repeat)	1677	else if (w->repeat)
…		…
1492	w->at = w->repeat;	1679	w->at = w->repeat;
1493	ev_timer_start (EV_A_ w);	1680	ev_timer_start (EV_A_ w);
1494	}	1681	}
1495	}	1682	}
1496		1683
1497	#if EV_PERIODICS	1684	#if EV_PERIODIC_ENABLE
1498	void	1685	void noinline
1499	ev_periodic_start (EV_P_ ev_periodic *w)	1686	ev_periodic_start (EV_P_ ev_periodic *w)
1500	{	1687	{
1501	if (expect_false (ev_is_active (w)))	1688	if (expect_false (ev_is_active (w)))
1502	return;	1689	return;
1503		1690
…		…
1505	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1692	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1506	else if (w->interval)	1693	else if (w->interval)
1507	{	1694	{
1508	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1695	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1509	/* this formula differs from the one in periodic_reify because we do not always round up */	1696	/* this formula differs from the one in periodic_reify because we do not always round up */
1510	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1697	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1511	}	1698	}
		1699	else
		1700	((WT)w)->at = w->offset;
1512		1701
1513	ev_start (EV_A_ (W)w, ++periodiccnt);	1702	ev_start (EV_A_ (W)w, ++periodiccnt);
1514	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	1703	array_needsize (WT, periodics, periodicmax, periodiccnt, EMPTY2);
1515	periodics [periodiccnt - 1] = w;	1704	periodics [periodiccnt - 1] = (WT)w;
1516	upheap ((WT *)periodics, periodiccnt - 1);	1705	upheap (periodics, periodiccnt - 1);
1517		1706
1518	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1707	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
1519	}	1708	}
1520		1709
1521	void	1710	void noinline
1522	ev_periodic_stop (EV_P_ ev_periodic *w)	1711	ev_periodic_stop (EV_P_ ev_periodic *w)
1523	{	1712	{
1524	ev_clear_pending (EV_A_ (W)w);	1713	clear_pending (EV_A_ (W)w);
1525	if (expect_false (!ev_is_active (w)))	1714	if (expect_false (!ev_is_active (w)))
1526	return;	1715	return;
1527		1716
1528	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1717	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == (WT)w));
1529		1718
		1719	{
		1720	int active = ((W)w)->active;
		1721
1530	if (expect_true (((W)w)->active < periodiccnt--))	1722	if (expect_true (--active < --periodiccnt))
1531	{	1723	{
1532	periodics [((W)w)->active - 1] = periodics [periodiccnt];	1724	periodics [active] = periodics [periodiccnt];
1533	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	1725	adjustheap (periodics, periodiccnt, active);
1534	}	1726	}
		1727	}
1535		1728
1536	ev_stop (EV_A_ (W)w);	1729	ev_stop (EV_A_ (W)w);
1537	}	1730	}
1538		1731
1539	void	1732	void noinline
1540	ev_periodic_again (EV_P_ ev_periodic *w)	1733	ev_periodic_again (EV_P_ ev_periodic *w)
1541	{	1734	{
1542	/* TODO: use adjustheap and recalculation */	1735	/* TODO: use adjustheap and recalculation */
1543	ev_periodic_stop (EV_A_ w);	1736	ev_periodic_stop (EV_A_ w);
1544	ev_periodic_start (EV_A_ w);	1737	ev_periodic_start (EV_A_ w);
1545	}	1738	}
1546	#endif	1739	#endif
1547		1740
1548	void
1549	ev_idle_start (EV_P_ ev_idle *w)
1550	{
1551	if (expect_false (ev_is_active (w)))
1552	return;
1553
1554	ev_start (EV_A_ (W)w, ++idlecnt);
1555	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1556	idles [idlecnt - 1] = w;
1557	}
1558
1559	void
1560	ev_idle_stop (EV_P_ ev_idle *w)
1561	{
1562	ev_clear_pending (EV_A_ (W)w);
1563	if (expect_false (!ev_is_active (w)))
1564	return;
1565
1566	{
1567	int active = ((W)w)->active;
1568	idles [active - 1] = idles [--idlecnt];
1569	((W)idles [active - 1])->active = active;
1570	}
1571
1572	ev_stop (EV_A_ (W)w);
1573	}
1574
1575	void
1576	ev_prepare_start (EV_P_ ev_prepare *w)
1577	{
1578	if (expect_false (ev_is_active (w)))
1579	return;
1580
1581	ev_start (EV_A_ (W)w, ++preparecnt);
1582	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1583	prepares [preparecnt - 1] = w;
1584	}
1585
1586	void
1587	ev_prepare_stop (EV_P_ ev_prepare *w)
1588	{
1589	ev_clear_pending (EV_A_ (W)w);
1590	if (expect_false (!ev_is_active (w)))
1591	return;
1592
1593	{
1594	int active = ((W)w)->active;
1595	prepares [active - 1] = prepares [--preparecnt];
1596	((W)prepares [active - 1])->active = active;
1597	}
1598
1599	ev_stop (EV_A_ (W)w);
1600	}
1601
1602	void
1603	ev_check_start (EV_P_ ev_check *w)
1604	{
1605	if (expect_false (ev_is_active (w)))
1606	return;
1607
1608	ev_start (EV_A_ (W)w, ++checkcnt);
1609	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1610	checks [checkcnt - 1] = w;
1611	}
1612
1613	void
1614	ev_check_stop (EV_P_ ev_check *w)
1615	{
1616	ev_clear_pending (EV_A_ (W)w);
1617	if (expect_false (!ev_is_active (w)))
1618	return;
1619
1620	{
1621	int active = ((W)w)->active;
1622	checks [active - 1] = checks [--checkcnt];
1623	((W)checks [active - 1])->active = active;
1624	}
1625
1626	ev_stop (EV_A_ (W)w);
1627	}
1628
1629	#ifndef SA_RESTART	1741	#ifndef SA_RESTART
1630	# define SA_RESTART 0	1742	# define SA_RESTART 0
1631	#endif	1743	#endif
1632		1744
1633	void	1745	void noinline
1634	ev_signal_start (EV_P_ ev_signal *w)	1746	ev_signal_start (EV_P_ ev_signal *w)
1635	{	1747	{
1636	#if EV_MULTIPLICITY	1748	#if EV_MULTIPLICITY
1637	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	1749	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1638	#endif	1750	#endif
1639	if (expect_false (ev_is_active (w)))	1751	if (expect_false (ev_is_active (w)))
1640	return;	1752	return;
1641		1753
1642	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1754	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1643		1755
		1756	{
		1757	#ifndef _WIN32
		1758	sigset_t full, prev;
		1759	sigfillset (&full);
		1760	sigprocmask (SIG_SETMASK, &full, &prev);
		1761	#endif
		1762
		1763	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1764
		1765	#ifndef _WIN32
		1766	sigprocmask (SIG_SETMASK, &prev, 0);
		1767	#endif
		1768	}
		1769
1644	ev_start (EV_A_ (W)w, 1);	1770	ev_start (EV_A_ (W)w, 1);
1645	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1646	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1771	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1647		1772
1648	if (!((WL)w)->next)	1773	if (!((WL)w)->next)
1649	{	1774	{
1650	#if _WIN32	1775	#if _WIN32
…		…
1657	sigaction (w->signum, &sa, 0);	1782	sigaction (w->signum, &sa, 0);
1658	#endif	1783	#endif
1659	}	1784	}
1660	}	1785	}
1661		1786
1662	void	1787	void noinline
1663	ev_signal_stop (EV_P_ ev_signal *w)	1788	ev_signal_stop (EV_P_ ev_signal *w)
1664	{	1789	{
1665	ev_clear_pending (EV_A_ (W)w);	1790	clear_pending (EV_A_ (W)w);
1666	if (expect_false (!ev_is_active (w)))	1791	if (expect_false (!ev_is_active (w)))
1667	return;	1792	return;
1668		1793
1669	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1794	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1670	ev_stop (EV_A_ (W)w);	1795	ev_stop (EV_A_ (W)w);
…		…
1681	#endif	1806	#endif
1682	if (expect_false (ev_is_active (w)))	1807	if (expect_false (ev_is_active (w)))
1683	return;	1808	return;
1684		1809
1685	ev_start (EV_A_ (W)w, 1);	1810	ev_start (EV_A_ (W)w, 1);
1686	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1811	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1687	}	1812	}
1688		1813
1689	void	1814	void
1690	ev_child_stop (EV_P_ ev_child *w)	1815	ev_child_stop (EV_P_ ev_child *w)
1691	{	1816	{
1692	ev_clear_pending (EV_A_ (W)w);	1817	clear_pending (EV_A_ (W)w);
1693	if (expect_false (!ev_is_active (w)))	1818	if (expect_false (!ev_is_active (w)))
1694	return;	1819	return;
1695		1820
1696	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1821	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1697	ev_stop (EV_A_ (W)w);	1822	ev_stop (EV_A_ (W)w);
1698	}	1823	}
1699		1824
1700	#if EV_MULTIPLICITY	1825	#if EV_STAT_ENABLE
		1826
		1827	# ifdef _WIN32
		1828	# undef lstat
		1829	# define lstat(a,b) _stati64 (a,b)
		1830	# endif
		1831
		1832	#define DEF_STAT_INTERVAL 5.0074891
		1833	#define MIN_STAT_INTERVAL 0.1074891
		1834
		1835	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1836
		1837	#if EV_USE_INOTIFY
		1838	# define EV_INOTIFY_BUFSIZE 8192
		1839
		1840	static void noinline
		1841	infy_add (EV_P_ ev_stat *w)
		1842	{
		1843	w->wd = inotify_add_watch (fs_fd, w->path, IN_ATTRIB | IN_DELETE_SELF | IN_MOVE_SELF | IN_MODIFY | IN_DONT_FOLLOW | IN_MASK_ADD);
		1844
		1845	if (w->wd < 0)
		1846	{
		1847	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1848
		1849	/* monitor some parent directory for speedup hints */
		1850	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1851	{
		1852	char path [4096];
		1853	strcpy (path, w->path);
		1854
		1855	do
		1856	{
		1857	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1858	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1859
		1860	char *pend = strrchr (path, '/');
		1861
		1862	if (!pend)
		1863	break; /* whoops, no '/', complain to your admin */
		1864
		1865	*pend = 0;
		1866	w->wd = inotify_add_watch (fs_fd, path, mask);
		1867	}
		1868	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1869	}
		1870	}
		1871	else
		1872	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1873
		1874	if (w->wd >= 0)
		1875	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1876	}
		1877
		1878	static void noinline
		1879	infy_del (EV_P_ ev_stat *w)
		1880	{
		1881	int slot;
		1882	int wd = w->wd;
		1883
		1884	if (wd < 0)
		1885	return;
		1886
		1887	w->wd = -2;
		1888	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1889	wlist_del (&fs_hash [slot].head, (WL)w);
		1890
		1891	/* remove this watcher, if others are watching it, they will rearm */
		1892	inotify_rm_watch (fs_fd, wd);
		1893	}
		1894
		1895	static void noinline
		1896	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1897	{
		1898	if (slot < 0)
		1899	/* overflow, need to check for all hahs slots */
		1900	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1901	infy_wd (EV_A_ slot, wd, ev);
		1902	else
		1903	{
		1904	WL w_;
		1905
		1906	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1907	{
		1908	ev_stat *w = (ev_stat *)w_;
		1909	w_ = w_->next; /* lets us remove this watcher and all before it */
		1910
		1911	if (w->wd == wd || wd == -1)
		1912	{
		1913	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1914	{
		1915	w->wd = -1;
		1916	infy_add (EV_A_ w); /* re-add, no matter what */
		1917	}
		1918
		1919	stat_timer_cb (EV_A_ &w->timer, 0);
		1920	}
		1921	}
		1922	}
		1923	}
		1924
		1925	static void
		1926	infy_cb (EV_P_ ev_io *w, int revents)
		1927	{
		1928	char buf [EV_INOTIFY_BUFSIZE];
		1929	struct inotify_event *ev = (struct inotify_event *)buf;
		1930	int ofs;
		1931	int len = read (fs_fd, buf, sizeof (buf));
		1932
		1933	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1934	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1935	}
		1936
		1937	void inline_size
		1938	infy_init (EV_P)
		1939	{
		1940	if (fs_fd != -2)
		1941	return;
		1942
		1943	fs_fd = inotify_init ();
		1944
		1945	if (fs_fd >= 0)
		1946	{
		1947	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1948	ev_set_priority (&fs_w, EV_MAXPRI);
		1949	ev_io_start (EV_A_ &fs_w);
		1950	}
		1951	}
		1952
		1953	void inline_size
		1954	infy_fork (EV_P)
		1955	{
		1956	int slot;
		1957
		1958	if (fs_fd < 0)
		1959	return;
		1960
		1961	close (fs_fd);
		1962	fs_fd = inotify_init ();
		1963
		1964	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1965	{
		1966	WL w_ = fs_hash [slot].head;
		1967	fs_hash [slot].head = 0;
		1968
		1969	while (w_)
		1970	{
		1971	ev_stat *w = (ev_stat *)w_;
		1972	w_ = w_->next; /* lets us add this watcher */
		1973
		1974	w->wd = -1;
		1975
		1976	if (fs_fd >= 0)
		1977	infy_add (EV_A_ w); /* re-add, no matter what */
		1978	else
		1979	ev_timer_start (EV_A_ &w->timer);
		1980	}
		1981
		1982	}
		1983	}
		1984
		1985	#endif
		1986
1701	void	1987	void
		1988	ev_stat_stat (EV_P_ ev_stat *w)
		1989	{
		1990	if (lstat (w->path, &w->attr) < 0)
		1991	w->attr.st_nlink = 0;
		1992	else if (!w->attr.st_nlink)
		1993	w->attr.st_nlink = 1;
		1994	}
		1995
		1996	static void noinline
		1997	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1998	{
		1999	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2000
		2001	/* we copy this here each the time so that */
		2002	/* prev has the old value when the callback gets invoked */
		2003	w->prev = w->attr;
		2004	ev_stat_stat (EV_A_ w);
		2005
		2006	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2007	if (
		2008	w->prev.st_dev != w->attr.st_dev
		2009	|| w->prev.st_ino != w->attr.st_ino
		2010	|| w->prev.st_mode != w->attr.st_mode
		2011	|| w->prev.st_nlink != w->attr.st_nlink
		2012	|| w->prev.st_uid != w->attr.st_uid
		2013	|| w->prev.st_gid != w->attr.st_gid
		2014	|| w->prev.st_rdev != w->attr.st_rdev
		2015	|| w->prev.st_size != w->attr.st_size
		2016	|| w->prev.st_atime != w->attr.st_atime
		2017	|| w->prev.st_mtime != w->attr.st_mtime
		2018	|| w->prev.st_ctime != w->attr.st_ctime
		2019	) {
		2020	#if EV_USE_INOTIFY
		2021	infy_del (EV_A_ w);
		2022	infy_add (EV_A_ w);
		2023	ev_stat_stat (EV_A_ w); /* avoid race... */
		2024	#endif
		2025
		2026	ev_feed_event (EV_A_ w, EV_STAT);
		2027	}
		2028	}
		2029
		2030	void
		2031	ev_stat_start (EV_P_ ev_stat *w)
		2032	{
		2033	if (expect_false (ev_is_active (w)))
		2034	return;
		2035
		2036	/* since we use memcmp, we need to clear any padding data etc. */
		2037	memset (&w->prev, 0, sizeof (ev_statdata));
		2038	memset (&w->attr, 0, sizeof (ev_statdata));
		2039
		2040	ev_stat_stat (EV_A_ w);
		2041
		2042	if (w->interval < MIN_STAT_INTERVAL)
		2043	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2044
		2045	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2046	ev_set_priority (&w->timer, ev_priority (w));
		2047
		2048	#if EV_USE_INOTIFY
		2049	infy_init (EV_A);
		2050
		2051	if (fs_fd >= 0)
		2052	infy_add (EV_A_ w);
		2053	else
		2054	#endif
		2055	ev_timer_start (EV_A_ &w->timer);
		2056
		2057	ev_start (EV_A_ (W)w, 1);
		2058	}
		2059
		2060	void
		2061	ev_stat_stop (EV_P_ ev_stat *w)
		2062	{
		2063	clear_pending (EV_A_ (W)w);
		2064	if (expect_false (!ev_is_active (w)))
		2065	return;
		2066
		2067	#if EV_USE_INOTIFY
		2068	infy_del (EV_A_ w);
		2069	#endif
		2070	ev_timer_stop (EV_A_ &w->timer);
		2071
		2072	ev_stop (EV_A_ (W)w);
		2073	}
		2074	#endif
		2075
		2076	#if EV_IDLE_ENABLE
		2077	void
		2078	ev_idle_start (EV_P_ ev_idle *w)
		2079	{
		2080	if (expect_false (ev_is_active (w)))
		2081	return;
		2082
		2083	pri_adjust (EV_A_ (W)w);
		2084
		2085	{
		2086	int active = ++idlecnt [ABSPRI (w)];
		2087
		2088	++idleall;
		2089	ev_start (EV_A_ (W)w, active);
		2090
		2091	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2092	idles [ABSPRI (w)][active - 1] = w;
		2093	}
		2094	}
		2095
		2096	void
		2097	ev_idle_stop (EV_P_ ev_idle *w)
		2098	{
		2099	clear_pending (EV_A_ (W)w);
		2100	if (expect_false (!ev_is_active (w)))
		2101	return;
		2102
		2103	{
		2104	int active = ((W)w)->active;
		2105
		2106	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2107	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2108
		2109	ev_stop (EV_A_ (W)w);
		2110	--idleall;
		2111	}
		2112	}
		2113	#endif
		2114
		2115	void
		2116	ev_prepare_start (EV_P_ ev_prepare *w)
		2117	{
		2118	if (expect_false (ev_is_active (w)))
		2119	return;
		2120
		2121	ev_start (EV_A_ (W)w, ++preparecnt);
		2122	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2123	prepares [preparecnt - 1] = w;
		2124	}
		2125
		2126	void
		2127	ev_prepare_stop (EV_P_ ev_prepare *w)
		2128	{
		2129	clear_pending (EV_A_ (W)w);
		2130	if (expect_false (!ev_is_active (w)))
		2131	return;
		2132
		2133	{
		2134	int active = ((W)w)->active;
		2135	prepares [active - 1] = prepares [--preparecnt];
		2136	((W)prepares [active - 1])->active = active;
		2137	}
		2138
		2139	ev_stop (EV_A_ (W)w);
		2140	}
		2141
		2142	void
		2143	ev_check_start (EV_P_ ev_check *w)
		2144	{
		2145	if (expect_false (ev_is_active (w)))
		2146	return;
		2147
		2148	ev_start (EV_A_ (W)w, ++checkcnt);
		2149	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2150	checks [checkcnt - 1] = w;
		2151	}
		2152
		2153	void
		2154	ev_check_stop (EV_P_ ev_check *w)
		2155	{
		2156	clear_pending (EV_A_ (W)w);
		2157	if (expect_false (!ev_is_active (w)))
		2158	return;
		2159
		2160	{
		2161	int active = ((W)w)->active;
		2162	checks [active - 1] = checks [--checkcnt];
		2163	((W)checks [active - 1])->active = active;
		2164	}
		2165
		2166	ev_stop (EV_A_ (W)w);
		2167	}
		2168
		2169	#if EV_EMBED_ENABLE
		2170	void noinline
1702	ev_embed_sweep (EV_P_ ev_embed *w)	2171	ev_embed_sweep (EV_P_ ev_embed *w)
1703	{	2172	{
1704	ev_loop (w->loop, EVLOOP_NONBLOCK);	2173	ev_loop (w->loop, EVLOOP_NONBLOCK);
1705	}	2174	}
1706		2175
…		…
1727	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2196	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);
1728	}	2197	}
1729		2198
1730	ev_set_priority (&w->io, ev_priority (w));	2199	ev_set_priority (&w->io, ev_priority (w));
1731	ev_io_start (EV_A_ &w->io);	2200	ev_io_start (EV_A_ &w->io);
		2201
1732	ev_start (EV_A_ (W)w, 1);	2202	ev_start (EV_A_ (W)w, 1);
1733	}	2203	}
1734		2204
1735	void	2205	void
1736	ev_embed_stop (EV_P_ ev_embed *w)	2206	ev_embed_stop (EV_P_ ev_embed *w)
1737	{	2207	{
1738	ev_clear_pending (EV_A_ (W)w);	2208	clear_pending (EV_A_ (W)w);
1739	if (expect_false (!ev_is_active (w)))	2209	if (expect_false (!ev_is_active (w)))
1740	return;	2210	return;
1741		2211
1742	ev_io_stop (EV_A_ &w->io);	2212	ev_io_stop (EV_A_ &w->io);
		2213
		2214	ev_stop (EV_A_ (W)w);
		2215	}
		2216	#endif
		2217
		2218	#if EV_FORK_ENABLE
		2219	void
		2220	ev_fork_start (EV_P_ ev_fork *w)
		2221	{
		2222	if (expect_false (ev_is_active (w)))
		2223	return;
		2224
		2225	ev_start (EV_A_ (W)w, ++forkcnt);
		2226	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2227	forks [forkcnt - 1] = w;
		2228	}
		2229
		2230	void
		2231	ev_fork_stop (EV_P_ ev_fork *w)
		2232	{
		2233	clear_pending (EV_A_ (W)w);
		2234	if (expect_false (!ev_is_active (w)))
		2235	return;
		2236
		2237	{
		2238	int active = ((W)w)->active;
		2239	forks [active - 1] = forks [--forkcnt];
		2240	((W)forks [active - 1])->active = active;
		2241	}
		2242
1743	ev_stop (EV_A_ (W)w);	2243	ev_stop (EV_A_ (W)w);
1744	}	2244	}
1745	#endif	2245	#endif
1746		2246
1747	/*****************************************************************************/	2247	/*****************************************************************************/

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