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Comparing libev/ev.c (file contents):
Revision 1.141 by root, Mon Nov 26 20:33:58 2007 UTC vs.
Revision 1.180 by root, Tue Dec 11 22:04:55 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>
…		…
109	#include <errno.h>	117	#include <errno.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>
		122
		123	#ifdef EV_H
		124	# include EV_H
		125	#else
		126	# include "ev.h"
		127	#endif
114		128
115	#ifndef _WIN32	129	#ifndef _WIN32
116	# include <sys/time.h>	130	# include <sys/time.h>
117	# include <sys/wait.h>	131	# include <sys/wait.h>
118	# include <unistd.h>	132	# include <unistd.h>
…		…
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_size static inline /* inline for codesize */
193	# if EV_MINIMAL
194	# define noinline __attribute__ ((noinline))	237	# define noinline __attribute__ ((noinline))
195	# define inline_speed static noinline
196	# else
197	# define noinline
198	# define inline_speed static inline
199	# endif
200	#else	238	#else
201	# define expect(expr,value) (expr)	239	# define expect(expr,value) (expr)
202	# define inline_speed static
203	# define inline_minimal static
204	# define noinline	240	# define noinline
		241	# if __STDC_VERSION__ < 199901L
		242	# define inline
		243	# endif
205	#endif	244	#endif
206		245
207	#define expect_false(expr) expect ((expr) != 0, 0)	246	#define expect_false(expr) expect ((expr) != 0, 0)
208	#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
209		255
210	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)	256	#define NUMPRI (EV_MAXPRI - EV_MINPRI + 1)
211	#define ABSPRI(w) ((w)->priority - EV_MINPRI)	257	#define ABSPRI(w) (((W)w)->priority - EV_MINPRI)
212		258
213	#define EMPTY0 /* required for microsofts broken pseudo-c compiler */	259	#define EMPTY /* required for microsofts broken pseudo-c compiler */
214	#define EMPTY2(a,b) /* used to suppress some warnings */	260	#define EMPTY2(a,b) /* used to suppress some warnings */
215		261
216	typedef ev_watcher *W;	262	typedef ev_watcher *W;
217	typedef ev_watcher_list *WL;	263	typedef ev_watcher_list *WL;
218	typedef ev_watcher_time *WT;	264	typedef ev_watcher_time *WT;
…		…
254	ev_set_allocator (void *(*cb)(void *ptr, long size))	300	ev_set_allocator (void *(*cb)(void *ptr, long size))
255	{	301	{
256	alloc = cb;	302	alloc = cb;
257	}	303	}
258		304
259	static void *	305	inline_speed void *
260	ev_realloc (void *ptr, long size)	306	ev_realloc (void *ptr, long size)
261	{	307	{
262	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);
263		309
264	if (!ptr && size)	310	if (!ptr && size)
…		…
288	typedef struct	334	typedef struct
289	{	335	{
290	W w;	336	W w;
291	int events;	337	int events;
292	} ANPENDING;	338	} ANPENDING;
		339
		340	#if EV_USE_INOTIFY
		341	typedef struct
		342	{
		343	WL head;
		344	} ANFS;
		345	#endif
293		346
294	#if EV_MULTIPLICITY	347	#if EV_MULTIPLICITY
295		348
296	struct ev_loop	349	struct ev_loop
297	{	350	{
…		…
354	{	407	{
355	return ev_rt_now;	408	return ev_rt_now;
356	}	409	}
357	#endif	410	#endif
358		411
359	#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	}
360		439
361	#define array_needsize(type,base,cur,cnt,init) \	440	#define array_needsize(type,base,cur,cnt,init) \
362	if (expect_false ((cnt) > cur)) \	441	if (expect_false ((cnt) > (cur))) \
363	{ \	442	{ \
364	int newcnt = cur; \	443	int ocur_ = (cur); \
365	do \	444	(base) = (type *)array_realloc \
366	{ \	445	(sizeof (type), (base), &(cur), (cnt)); \
367	newcnt = array_roundsize (type, newcnt << 1); \	446	init ((base) + (ocur_), (cur) - ocur_); \
368	} \
369	while ((cnt) > newcnt); \
370	\
371	base = (type *)ev_realloc (base, sizeof (type) * (newcnt));\
372	init (base + cur, newcnt - cur); \
373	cur = newcnt; \
374	}	447	}
375		448
		449	#if 0
376	#define array_slim(type,stem) \	450	#define array_slim(type,stem) \
377	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \	451	if (stem ## max < array_roundsize (stem ## cnt >> 2)) \
378	{ \	452	{ \
379	stem ## max = array_roundsize (stem ## cnt >> 1); \	453	stem ## max = array_roundsize (stem ## cnt >> 1); \
380	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\	454	base = (type *)ev_realloc (base, sizeof (type) * (stem ## max));\
381	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\	455	fprintf (stderr, "slimmed down " # stem " to %d\n", stem ## max);/*D*/\
382	}	456	}
		457	#endif
383		458
384	#define array_free(stem, idx) \	459	#define array_free(stem, idx) \
385	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;
386		461
387	/*****************************************************************************/	462	/*****************************************************************************/
388		463
389	void noinline	464	void noinline
390	ev_feed_event (EV_P_ void *w, int revents)	465	ev_feed_event (EV_P_ void *w, int revents)
391	{	466	{
392	W w_ = (W)w;	467	W w_ = (W)w;
		468	int pri = ABSPRI (w_);
393		469
394	if (expect_false (w_->pending))	470	if (expect_false (w_->pending))
		471	pendings [pri][w_->pending - 1].events |= revents;
		472	else
395	{	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_;
396	pendings [ABSPRI (w_)][w_->pending - 1].events |= revents;	477	pendings [pri][w_->pending - 1].events = revents;
397	return;
398	}	478	}
399
400	w_->pending = ++pendingcnt [ABSPRI (w_)];
401	array_needsize (ANPENDING, pendings [ABSPRI (w_)], pendingmax [ABSPRI (w_)], pendingcnt [ABSPRI (w_)], EMPTY2);
402	pendings [ABSPRI (w_)][w_->pending - 1].w = w_;
403	pendings [ABSPRI (w_)][w_->pending - 1].events = revents;
404	}	479	}
405		480
406	void inline_size	481	void inline_speed
407	queue_events (EV_P_ W *events, int eventcnt, int type)	482	queue_events (EV_P_ W *events, int eventcnt, int type)
408	{	483	{
409	int i;	484	int i;
410		485
411	for (i = 0; i < eventcnt; ++i)	486	for (i = 0; i < eventcnt; ++i)
…		…
443	}	518	}
444		519
445	void	520	void
446	ev_feed_fd_event (EV_P_ int fd, int revents)	521	ev_feed_fd_event (EV_P_ int fd, int revents)
447	{	522	{
		523	if (fd >= 0 && fd < anfdmax)
448	fd_event (EV_A_ fd, revents);	524	fd_event (EV_A_ fd, revents);
449	}	525	}
450		526
451	void inline_size	527	void inline_size
452	fd_reify (EV_P)	528	fd_reify (EV_P)
453	{	529	{
…		…
547	static void noinline	623	static void noinline
548	fd_rearm_all (EV_P)	624	fd_rearm_all (EV_P)
549	{	625	{
550	int fd;	626	int fd;
551		627
552	/* this should be highly optimised to not do anything but set a flag */
553	for (fd = 0; fd < anfdmax; ++fd)	628	for (fd = 0; fd < anfdmax; ++fd)
554	if (anfds [fd].events)	629	if (anfds [fd].events)
555	{	630	{
556	anfds [fd].events = 0;	631	anfds [fd].events = 0;
557	fd_change (EV_A_ fd);	632	fd_change (EV_A_ fd);
…		…
563	void inline_speed	638	void inline_speed
564	upheap (WT *heap, int k)	639	upheap (WT *heap, int k)
565	{	640	{
566	WT w = heap [k];	641	WT w = heap [k];
567		642
568	while (k && heap [k >> 1]->at > w->at)	643	while (k)
569	{	644	{
		645	int p = (k - 1) >> 1;
		646
		647	if (heap [p]->at <= w->at)
		648	break;
		649
570	heap [k] = heap [k >> 1];	650	heap [k] = heap [p];
571	((W)heap [k])->active = k + 1;	651	((W)heap [k])->active = k + 1;
572	k >>= 1;	652	k = p;
573	}	653	}
574		654
575	heap [k] = w;	655	heap [k] = w;
576	((W)heap [k])->active = k + 1;	656	((W)heap [k])->active = k + 1;
577		657
…		…
580	void inline_speed	660	void inline_speed
581	downheap (WT *heap, int N, int k)	661	downheap (WT *heap, int N, int k)
582	{	662	{
583	WT w = heap [k];	663	WT w = heap [k];
584		664
585	while (k < (N >> 1))	665	for (;;)
586	{	666	{
587	int j = k << 1;	667	int c = (k << 1) + 1;
588		668
589	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	669	if (c >= N)
590	++j;
591
592	if (w->at <= heap [j]->at)
593	break;	670	break;
594		671
		672	c += c + 1 < N && heap [c]->at > heap [c + 1]->at
		673	? 1 : 0;
		674
		675	if (w->at <= heap [c]->at)
		676	break;
		677
595	heap [k] = heap [j];	678	heap [k] = heap [c];
596	((W)heap [k])->active = k + 1;	679	((W)heap [k])->active = k + 1;
		680
597	k = j;	681	k = c;
598	}	682	}
599		683
600	heap [k] = w;	684	heap [k] = w;
601	((W)heap [k])->active = k + 1;	685	((W)heap [k])->active = k + 1;
602	}	686	}
…		…
684	for (signum = signalmax; signum--; )	768	for (signum = signalmax; signum--; )
685	if (signals [signum].gotsig)	769	if (signals [signum].gotsig)
686	ev_feed_signal_event (EV_A_ signum + 1);	770	ev_feed_signal_event (EV_A_ signum + 1);
687	}	771	}
688		772
689	void inline_size	773	void inline_speed
690	fd_intern (int fd)	774	fd_intern (int fd)
691	{	775	{
692	#ifdef _WIN32	776	#ifdef _WIN32
693	int arg = 1;	777	int arg = 1;
694	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);	778	ioctlsocket (_get_osfhandle (fd), FIONBIO, &arg);
…		…
709	ev_unref (EV_A); /* child watcher should not keep loop alive */	793	ev_unref (EV_A); /* child watcher should not keep loop alive */
710	}	794	}
711		795
712	/*****************************************************************************/	796	/*****************************************************************************/
713		797
714	static ev_child *childs [PID_HASHSIZE];	798	static ev_child *childs [EV_PID_HASHSIZE];
715		799
716	#ifndef _WIN32	800	#ifndef _WIN32
717		801
718	static ev_signal childev;	802	static ev_signal childev;
		803
		804	void inline_speed
		805	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
		806	{
		807	ev_child *w;
		808
		809	for (w = (ev_child *)childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
		810	if (w->pid == pid || !w->pid)
		811	{
		812	ev_set_priority (w, ev_priority (sw)); /* need to do it *now* */
		813	w->rpid = pid;
		814	w->rstatus = status;
		815	ev_feed_event (EV_A_ (W)w, EV_CHILD);
		816	}
		817	}
719		818
720	#ifndef WCONTINUED	819	#ifndef WCONTINUED
721	# define WCONTINUED 0	820	# define WCONTINUED 0
722	#endif	821	#endif
723		822
724	void inline_speed
725	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)
726	{
727	ev_child *w;
728
729	for (w = (ev_child *)childs [chain & (PID_HASHSIZE - 1)]; w; w = (ev_child *)((WL)w)->next)
730	if (w->pid == pid || !w->pid)
731	{
732	ev_priority (w) = ev_priority (sw); /* need to do it *now* */
733	w->rpid = pid;
734	w->rstatus = status;
735	ev_feed_event (EV_A_ (W)w, EV_CHILD);
736	}
737	}
738
739	static void	823	static void
740	childcb (EV_P_ ev_signal *sw, int revents)	824	childcb (EV_P_ ev_signal *sw, int revents)
741	{	825	{
742	int pid, status;	826	int pid, status;
743		827
		828	/* some systems define WCONTINUED but then fail to support it (linux 2.4) */
744	if (0 < (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))	829	if (0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED | WCONTINUED)))
745	{	830	if (!WCONTINUED
		831	|| errno != EINVAL
		832	|| 0 >= (pid = waitpid (-1, &status, WNOHANG | WUNTRACED)))
		833	return;
		834
746	/* make sure we are called again until all childs have been reaped */	835	/* make sure we are called again until all childs have been reaped */
747	/* we need to do it this way so that the callback gets called before we continue */	836	/* we need to do it this way so that the callback gets called before we continue */
748	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	837	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
749		838
750	child_reap (EV_A_ sw, pid, pid, status);	839	child_reap (EV_A_ sw, pid, pid, status);
		840	if (EV_PID_HASHSIZE > 1)
751	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	841	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
752	}
753	}	842	}
754		843
755	#endif	844	#endif
756		845
757	/*****************************************************************************/	846	/*****************************************************************************/
…		…
840	ev_backend (EV_P)	929	ev_backend (EV_P)
841	{	930	{
842	return backend;	931	return backend;
843	}	932	}
844		933
845	static void	934	unsigned int
		935	ev_loop_count (EV_P)
		936	{
		937	return loop_count;
		938	}
		939
		940	static void noinline
846	loop_init (EV_P_ unsigned int flags)	941	loop_init (EV_P_ unsigned int flags)
847	{	942	{
848	if (!backend)	943	if (!backend)
849	{	944	{
850	#if EV_USE_MONOTONIC	945	#if EV_USE_MONOTONIC
…		…
858	ev_rt_now = ev_time ();	953	ev_rt_now = ev_time ();
859	mn_now = get_clock ();	954	mn_now = get_clock ();
860	now_floor = mn_now;	955	now_floor = mn_now;
861	rtmn_diff = ev_rt_now - mn_now;	956	rtmn_diff = ev_rt_now - mn_now;
862		957
		958	/* pid check not overridable via env */
		959	#ifndef _WIN32
		960	if (flags & EVFLAG_FORKCHECK)
		961	curpid = getpid ();
		962	#endif
		963
863	if (!(flags & EVFLAG_NOENV)	964	if (!(flags & EVFLAG_NOENV)
864	&& !enable_secure ()	965	&& !enable_secure ()
865	&& getenv ("LIBEV_FLAGS"))	966	&& getenv ("LIBEV_FLAGS"))
866	flags = atoi (getenv ("LIBEV_FLAGS"));	967	flags = atoi (getenv ("LIBEV_FLAGS"));
867		968
868	if (!(flags & 0x0000ffffUL))	969	if (!(flags & 0x0000ffffUL))
869	flags |= ev_recommended_backends ();	970	flags |= ev_recommended_backends ();
870		971
871	backend = 0;	972	backend = 0;
		973	backend_fd = -1;
		974	#if EV_USE_INOTIFY
		975	fs_fd = -2;
		976	#endif
		977
872	#if EV_USE_PORT	978	#if EV_USE_PORT
873	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	979	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
874	#endif	980	#endif
875	#if EV_USE_KQUEUE	981	#if EV_USE_KQUEUE
876	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);	982	if (!backend && (flags & EVBACKEND_KQUEUE)) backend = kqueue_init (EV_A_ flags);
…		…
888	ev_init (&sigev, sigcb);	994	ev_init (&sigev, sigcb);
889	ev_set_priority (&sigev, EV_MAXPRI);	995	ev_set_priority (&sigev, EV_MAXPRI);
890	}	996	}
891	}	997	}
892		998
893	static void	999	static void noinline
894	loop_destroy (EV_P)	1000	loop_destroy (EV_P)
895	{	1001	{
896	int i;	1002	int i;
		1003
		1004	#if EV_USE_INOTIFY
		1005	if (fs_fd >= 0)
		1006	close (fs_fd);
		1007	#endif
		1008
		1009	if (backend_fd >= 0)
		1010	close (backend_fd);
897		1011
898	#if EV_USE_PORT	1012	#if EV_USE_PORT
899	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);	1013	if (backend == EVBACKEND_PORT ) port_destroy (EV_A);
900	#endif	1014	#endif
901	#if EV_USE_KQUEUE	1015	#if EV_USE_KQUEUE
…		…
910	#if EV_USE_SELECT	1024	#if EV_USE_SELECT
911	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);	1025	if (backend == EVBACKEND_SELECT) select_destroy (EV_A);
912	#endif	1026	#endif
913		1027
914	for (i = NUMPRI; i--; )	1028	for (i = NUMPRI; i--; )
		1029	{
915	array_free (pending, [i]);	1030	array_free (pending, [i]);
		1031	#if EV_IDLE_ENABLE
		1032	array_free (idle, [i]);
		1033	#endif
		1034	}
916		1035
917	/* have to use the microsoft-never-gets-it-right macro */	1036	/* have to use the microsoft-never-gets-it-right macro */
918	array_free (fdchange, EMPTY0);	1037	array_free (fdchange, EMPTY);
919	array_free (timer, EMPTY0);	1038	array_free (timer, EMPTY);
920	#if EV_PERIODIC_ENABLE	1039	#if EV_PERIODIC_ENABLE
921	array_free (periodic, EMPTY0);	1040	array_free (periodic, EMPTY);
922	#endif	1041	#endif
923	array_free (idle, EMPTY0);
924	array_free (prepare, EMPTY0);	1042	array_free (prepare, EMPTY);
925	array_free (check, EMPTY0);	1043	array_free (check, EMPTY);
926		1044
927	backend = 0;	1045	backend = 0;
928	}	1046	}
929		1047
930	static void	1048	void inline_size infy_fork (EV_P);
		1049
		1050	void inline_size
931	loop_fork (EV_P)	1051	loop_fork (EV_P)
932	{	1052	{
933	#if EV_USE_PORT	1053	#if EV_USE_PORT
934	if (backend == EVBACKEND_PORT ) port_fork (EV_A);	1054	if (backend == EVBACKEND_PORT ) port_fork (EV_A);
935	#endif	1055	#endif
936	#if EV_USE_KQUEUE	1056	#if EV_USE_KQUEUE
937	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);	1057	if (backend == EVBACKEND_KQUEUE) kqueue_fork (EV_A);
938	#endif	1058	#endif
939	#if EV_USE_EPOLL	1059	#if EV_USE_EPOLL
940	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);	1060	if (backend == EVBACKEND_EPOLL ) epoll_fork (EV_A);
		1061	#endif
		1062	#if EV_USE_INOTIFY
		1063	infy_fork (EV_A);
941	#endif	1064	#endif
942		1065
943	if (ev_is_active (&sigev))	1066	if (ev_is_active (&sigev))
944	{	1067	{
945	/* default loop */	1068	/* default loop */
…		…
1061	postfork = 1;	1184	postfork = 1;
1062	}	1185	}
1063		1186
1064	/*****************************************************************************/	1187	/*****************************************************************************/
1065		1188
1066	int inline_size	1189	void
1067	any_pending (EV_P)	1190	ev_invoke (EV_P_ void *w, int revents)
1068	{	1191	{
1069	int pri;	1192	EV_CB_INVOKE ((W)w, revents);
1070
1071	for (pri = NUMPRI; pri--; )
1072	if (pendingcnt [pri])
1073	return 1;
1074
1075	return 0;
1076	}	1193	}
1077		1194
1078	void inline_speed	1195	void inline_speed
1079	call_pending (EV_P)	1196	call_pending (EV_P)
1080	{	1197	{
…		…
1085	{	1202	{
1086	ANPENDING *p = pendings [pri] + --pendingcnt [pri];	1203	ANPENDING *p = pendings [pri] + --pendingcnt [pri];
1087		1204
1088	if (expect_true (p->w))	1205	if (expect_true (p->w))
1089	{	1206	{
1090	assert (("non-pending watcher on pending list", p->w->pending));	1207	/*assert (("non-pending watcher on pending list", p->w->pending));*/
1091		1208
1092	p->w->pending = 0;	1209	p->w->pending = 0;
1093	EV_CB_INVOKE (p->w, p->events);	1210	EV_CB_INVOKE (p->w, p->events);
1094	}	1211	}
1095	}	1212	}
…		…
1100	{	1217	{
1101	while (timercnt && ((WT)timers [0])->at <= mn_now)	1218	while (timercnt && ((WT)timers [0])->at <= mn_now)
1102	{	1219	{
1103	ev_timer *w = timers [0];	1220	ev_timer *w = timers [0];
1104		1221
1105	assert (("inactive timer on timer heap detected", ev_is_active (w)));	1222	/*assert (("inactive timer on timer heap detected", ev_is_active (w)));*/
1106		1223
1107	/* first reschedule or stop timer */	1224	/* first reschedule or stop timer */
1108	if (w->repeat)	1225	if (w->repeat)
1109	{	1226	{
1110	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));	1227	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
…		…
1128	{	1245	{
1129	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)	1246	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1130	{	1247	{
1131	ev_periodic *w = periodics [0];	1248	ev_periodic *w = periodics [0];
1132		1249
1133	assert (("inactive timer on periodic heap detected", ev_is_active (w)));	1250	/*assert (("inactive timer on periodic heap detected", ev_is_active (w)));*/
1134		1251
1135	/* first reschedule or stop timer */	1252	/* first reschedule or stop timer */
1136	if (w->reschedule_cb)	1253	if (w->reschedule_cb)
1137	{	1254	{
1138	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);	1255	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1139	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));	1256	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1140	downheap ((WT *)periodics, periodiccnt, 0);	1257	downheap ((WT *)periodics, periodiccnt, 0);
1141	}	1258	}
1142	else if (w->interval)	1259	else if (w->interval)
1143	{	1260	{
1144	((WT)w)->at += floor ((ev_rt_now - ((WT)w)->at) / w->interval + 1.) * w->interval;	1261	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1262	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1145	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));	1263	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1146	downheap ((WT *)periodics, periodiccnt, 0);	1264	downheap ((WT *)periodics, periodiccnt, 0);
1147	}	1265	}
1148	else	1266	else
1149	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */	1267	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
…		…
1163	ev_periodic *w = periodics [i];	1281	ev_periodic *w = periodics [i];
1164		1282
1165	if (w->reschedule_cb)	1283	if (w->reschedule_cb)
1166	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1284	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1167	else if (w->interval)	1285	else if (w->interval)
1168	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1286	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1169	}	1287	}
1170		1288
1171	/* now rebuild the heap */	1289	/* now rebuild the heap */
1172	for (i = periodiccnt >> 1; i--; )	1290	for (i = periodiccnt >> 1; i--; )
1173	downheap ((WT *)periodics, periodiccnt, i);	1291	downheap ((WT *)periodics, periodiccnt, i);
1174	}	1292	}
1175	#endif	1293	#endif
1176		1294
		1295	#if EV_IDLE_ENABLE
1177	int inline_size	1296	void inline_size
1178	time_update_monotonic (EV_P)	1297	idle_reify (EV_P)
1179	{	1298	{
		1299	if (expect_false (idleall))
		1300	{
		1301	int pri;
		1302
		1303	for (pri = NUMPRI; pri--; )
		1304	{
		1305	if (pendingcnt [pri])
		1306	break;
		1307
		1308	if (idlecnt [pri])
		1309	{
		1310	queue_events (EV_A_ (W *)idles [pri], idlecnt [pri], EV_IDLE);
		1311	break;
		1312	}
		1313	}
		1314	}
		1315	}
		1316	#endif
		1317
		1318	void inline_speed
		1319	time_update (EV_P_ ev_tstamp max_block)
		1320	{
		1321	int i;
		1322
		1323	#if EV_USE_MONOTONIC
		1324	if (expect_true (have_monotonic))
		1325	{
		1326	ev_tstamp odiff = rtmn_diff;
		1327
1180	mn_now = get_clock ();	1328	mn_now = get_clock ();
1181		1329
		1330	/* only fetch the realtime clock every 0.5*MIN_TIMEJUMP seconds */
		1331	/* interpolate in the meantime */
1182	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1332	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1183	{	1333	{
1184	ev_rt_now = rtmn_diff + mn_now;	1334	ev_rt_now = rtmn_diff + mn_now;
1185	return 0;	1335	return;
1186	}	1336	}
1187	else	1337
1188	{
1189	now_floor = mn_now;	1338	now_floor = mn_now;
1190	ev_rt_now = ev_time ();	1339	ev_rt_now = ev_time ();
1191	return 1;
1192	}
1193	}
1194		1340
1195	void inline_size	1341	/* loop a few times, before making important decisions.
1196	time_update (EV_P)	1342	* on the choice of "4": one iteration isn't enough,
1197	{	1343	* in case we get preempted during the calls to
1198	int i;	1344	* ev_time and get_clock. a second call is almost guaranteed
1199		1345	* to succeed in that case, though. and looping a few more times
1200	#if EV_USE_MONOTONIC	1346	* doesn't hurt either as we only do this on time-jumps or
1201	if (expect_true (have_monotonic))	1347	* in the unlikely event of having been preempted here.
1202	{	1348	*/
1203	if (time_update_monotonic (EV_A))	1349	for (i = 4; --i; )
1204	{	1350	{
1205	ev_tstamp odiff = rtmn_diff;
1206
1207	/* loop a few times, before making important decisions.
1208	* on the choice of "4": one iteration isn't enough,
1209	* in case we get preempted during the calls to
1210	* ev_time and get_clock. a second call is almost guarenteed
1211	* to succeed in that case, though. and looping a few more times
1212	* doesn't hurt either as we only do this on time-jumps or
1213	* in the unlikely event of getting preempted here.
1214	*/
1215	for (i = 4; --i; )
1216	{
1217	rtmn_diff = ev_rt_now - mn_now;	1351	rtmn_diff = ev_rt_now - mn_now;
1218		1352
1219	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1353	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)
1220	return; /* all is well */	1354	return; /* all is well */
1221		1355
1222	ev_rt_now = ev_time ();	1356	ev_rt_now = ev_time ();
1223	mn_now = get_clock ();	1357	mn_now = get_clock ();
1224	now_floor = mn_now;	1358	now_floor = mn_now;
1225	}	1359	}
1226		1360
1227	# if EV_PERIODIC_ENABLE	1361	# if EV_PERIODIC_ENABLE
1228	periodics_reschedule (EV_A);	1362	periodics_reschedule (EV_A);
1229	# endif	1363	# endif
1230	/* no timer adjustment, as the monotonic clock doesn't jump */	1364	/* no timer adjustment, as the monotonic clock doesn't jump */
1231	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1365	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1232	}
1233	}	1366	}
1234	else	1367	else
1235	#endif	1368	#endif
1236	{	1369	{
1237	ev_rt_now = ev_time ();	1370	ev_rt_now = ev_time ();
1238		1371
1239	if (expect_false (mn_now > ev_rt_now || mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1372	if (expect_false (mn_now > ev_rt_now || ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1240	{	1373	{
1241	#if EV_PERIODIC_ENABLE	1374	#if EV_PERIODIC_ENABLE
1242	periodics_reschedule (EV_A);	1375	periodics_reschedule (EV_A);
1243	#endif	1376	#endif
1244
1245	/* adjust timers. this is easy, as the offset is the same for all */	1377	/* adjust timers. this is easy, as the offset is the same for all of them */
1246	for (i = 0; i < timercnt; ++i)	1378	for (i = 0; i < timercnt; ++i)
1247	((WT)timers [i])->at += ev_rt_now - mn_now;	1379	((WT)timers [i])->at += ev_rt_now - mn_now;
1248	}	1380	}
1249		1381
1250	mn_now = ev_rt_now;	1382	mn_now = ev_rt_now;
…		…
1270	{	1402	{
1271	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)	1403	loop_done = flags & (EVLOOP_ONESHOT | EVLOOP_NONBLOCK)
1272	? EVUNLOOP_ONE	1404	? EVUNLOOP_ONE
1273	: EVUNLOOP_CANCEL;	1405	: EVUNLOOP_CANCEL;
1274		1406
1275	while (activecnt)	1407	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
		1408
		1409	do
1276	{	1410	{
		1411	#ifndef _WIN32
		1412	if (expect_false (curpid)) /* penalise the forking check even more */
		1413	if (expect_false (getpid () != curpid))
		1414	{
		1415	curpid = getpid ();
		1416	postfork = 1;
		1417	}
		1418	#endif
		1419
		1420	#if EV_FORK_ENABLE
		1421	/* we might have forked, so queue fork handlers */
		1422	if (expect_false (postfork))
		1423	if (forkcnt)
		1424	{
		1425	queue_events (EV_A_ (W *)forks, forkcnt, EV_FORK);
		1426	call_pending (EV_A);
		1427	}
		1428	#endif
		1429
1277	/* queue check watchers (and execute them) */	1430	/* queue prepare watchers (and execute them) */
1278	if (expect_false (preparecnt))	1431	if (expect_false (preparecnt))
1279	{	1432	{
1280	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);	1433	queue_events (EV_A_ (W *)prepares, preparecnt, EV_PREPARE);
1281	call_pending (EV_A);	1434	call_pending (EV_A);
1282	}	1435	}
1283		1436
		1437	if (expect_false (!activecnt))
		1438	break;
		1439
1284	/* we might have forked, so reify kernel state if necessary */	1440	/* we might have forked, so reify kernel state if necessary */
1285	if (expect_false (postfork))	1441	if (expect_false (postfork))
1286	loop_fork (EV_A);	1442	loop_fork (EV_A);
1287		1443
1288	/* update fd-related kernel structures */	1444	/* update fd-related kernel structures */
1289	fd_reify (EV_A);	1445	fd_reify (EV_A);
1290		1446
1291	/* calculate blocking time */	1447	/* calculate blocking time */
1292	{	1448	{
1293	double block;	1449	ev_tstamp block;
1294		1450
1295	if (flags & EVLOOP_NONBLOCK || idlecnt)	1451	if (expect_false (flags & EVLOOP_NONBLOCK || idleall || !activecnt))
1296	block = 0.; /* do not block at all */	1452	block = 0.; /* do not block at all */
1297	else	1453	else
1298	{	1454	{
1299	/* update time to cancel out callback processing overhead */	1455	/* update time to cancel out callback processing overhead */
1300	#if EV_USE_MONOTONIC
1301	if (expect_true (have_monotonic))
1302	time_update_monotonic (EV_A);	1456	time_update (EV_A_ 1e100);
1303	else
1304	#endif
1305	{
1306	ev_rt_now = ev_time ();
1307	mn_now = ev_rt_now;
1308	}
1309		1457
1310	block = MAX_BLOCKTIME;	1458	block = MAX_BLOCKTIME;
1311		1459
1312	if (timercnt)	1460	if (timercnt)
1313	{	1461	{
…		…
1324	#endif	1472	#endif
1325		1473
1326	if (expect_false (block < 0.)) block = 0.;	1474	if (expect_false (block < 0.)) block = 0.;
1327	}	1475	}
1328		1476
		1477	++loop_count;
1329	backend_poll (EV_A_ block);	1478	backend_poll (EV_A_ block);
		1479
		1480	/* update ev_rt_now, do magic */
		1481	time_update (EV_A_ block);
1330	}	1482	}
1331
1332	/* update ev_rt_now, do magic */
1333	time_update (EV_A);
1334		1483
1335	/* queue pending timers and reschedule them */	1484	/* queue pending timers and reschedule them */
1336	timers_reify (EV_A); /* relative timers called last */	1485	timers_reify (EV_A); /* relative timers called last */
1337	#if EV_PERIODIC_ENABLE	1486	#if EV_PERIODIC_ENABLE
1338	periodics_reify (EV_A); /* absolute timers called first */	1487	periodics_reify (EV_A); /* absolute timers called first */
1339	#endif	1488	#endif
1340		1489
		1490	#if EV_IDLE_ENABLE
1341	/* queue idle watchers unless other events are pending */	1491	/* queue idle watchers unless other events are pending */
1342	if (idlecnt && !any_pending (EV_A))	1492	idle_reify (EV_A);
1343	queue_events (EV_A_ (W *)idles, idlecnt, EV_IDLE);	1493	#endif
1344		1494
1345	/* queue check watchers, to be executed first */	1495	/* queue check watchers, to be executed first */
1346	if (expect_false (checkcnt))	1496	if (expect_false (checkcnt))
1347	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1497	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1348		1498
1349	call_pending (EV_A);	1499	call_pending (EV_A);
1350		1500
1351	if (expect_false (loop_done))
1352	break;
1353	}	1501	}
		1502	while (expect_true (activecnt && !loop_done));
1354		1503
1355	if (loop_done == EVUNLOOP_ONE)	1504	if (loop_done == EVUNLOOP_ONE)
1356	loop_done = EVUNLOOP_CANCEL;	1505	loop_done = EVUNLOOP_CANCEL;
1357	}	1506	}
1358		1507
…		…
1385	head = &(*head)->next;	1534	head = &(*head)->next;
1386	}	1535	}
1387	}	1536	}
1388		1537
1389	void inline_speed	1538	void inline_speed
1390	ev_clear_pending (EV_P_ W w)	1539	clear_pending (EV_P_ W w)
1391	{	1540	{
1392	if (w->pending)	1541	if (w->pending)
1393	{	1542	{
1394	pendings [ABSPRI (w)][w->pending - 1].w = 0;	1543	pendings [ABSPRI (w)][w->pending - 1].w = 0;
1395	w->pending = 0;	1544	w->pending = 0;
1396	}	1545	}
1397	}	1546	}
1398		1547
		1548	int
		1549	ev_clear_pending (EV_P_ void *w)
		1550	{
		1551	W w_ = (W)w;
		1552	int pending = w_->pending;
		1553
		1554	if (expect_true (pending))
		1555	{
		1556	ANPENDING *p = pendings [ABSPRI (w_)] + pending - 1;
		1557	w_->pending = 0;
		1558	p->w = 0;
		1559	return p->events;
		1560	}
		1561	else
		1562	return 0;
		1563	}
		1564
		1565	void inline_size
		1566	pri_adjust (EV_P_ W w)
		1567	{
		1568	int pri = w->priority;
		1569	pri = pri < EV_MINPRI ? EV_MINPRI : pri;
		1570	pri = pri > EV_MAXPRI ? EV_MAXPRI : pri;
		1571	w->priority = pri;
		1572	}
		1573
1399	void inline_speed	1574	void inline_speed
1400	ev_start (EV_P_ W w, int active)	1575	ev_start (EV_P_ W w, int active)
1401	{	1576	{
1402	if (w->priority < EV_MINPRI) w->priority = EV_MINPRI;	1577	pri_adjust (EV_A_ w);
1403	if (w->priority > EV_MAXPRI) w->priority = EV_MAXPRI;
1404
1405	w->active = active;	1578	w->active = active;
1406	ev_ref (EV_A);	1579	ev_ref (EV_A);
1407	}	1580	}
1408		1581
1409	void inline_size	1582	void inline_size
…		…
1413	w->active = 0;	1586	w->active = 0;
1414	}	1587	}
1415		1588
1416	/*****************************************************************************/	1589	/*****************************************************************************/
1417		1590
1418	void	1591	void noinline
1419	ev_io_start (EV_P_ ev_io *w)	1592	ev_io_start (EV_P_ ev_io *w)
1420	{	1593	{
1421	int fd = w->fd;	1594	int fd = w->fd;
1422		1595
1423	if (expect_false (ev_is_active (w)))	1596	if (expect_false (ev_is_active (w)))
…		…
1430	wlist_add ((WL *)&anfds[fd].head, (WL)w);	1603	wlist_add ((WL *)&anfds[fd].head, (WL)w);
1431		1604
1432	fd_change (EV_A_ fd);	1605	fd_change (EV_A_ fd);
1433	}	1606	}
1434		1607
1435	void	1608	void noinline
1436	ev_io_stop (EV_P_ ev_io *w)	1609	ev_io_stop (EV_P_ ev_io *w)
1437	{	1610	{
1438	ev_clear_pending (EV_A_ (W)w);	1611	clear_pending (EV_A_ (W)w);
1439	if (expect_false (!ev_is_active (w)))	1612	if (expect_false (!ev_is_active (w)))
1440	return;	1613	return;
1441		1614
1442	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	1615	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1443		1616
…		…
1445	ev_stop (EV_A_ (W)w);	1618	ev_stop (EV_A_ (W)w);
1446		1619
1447	fd_change (EV_A_ w->fd);	1620	fd_change (EV_A_ w->fd);
1448	}	1621	}
1449		1622
1450	void	1623	void noinline
1451	ev_timer_start (EV_P_ ev_timer *w)	1624	ev_timer_start (EV_P_ ev_timer *w)
1452	{	1625	{
1453	if (expect_false (ev_is_active (w)))	1626	if (expect_false (ev_is_active (w)))
1454	return;	1627	return;
1455		1628
…		…
1460	ev_start (EV_A_ (W)w, ++timercnt);	1633	ev_start (EV_A_ (W)w, ++timercnt);
1461	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	1634	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);
1462	timers [timercnt - 1] = w;	1635	timers [timercnt - 1] = w;
1463	upheap ((WT *)timers, timercnt - 1);	1636	upheap ((WT *)timers, timercnt - 1);
1464		1637
		1638	/*assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));*/
		1639	}
		1640
		1641	void noinline
		1642	ev_timer_stop (EV_P_ ev_timer *w)
		1643	{
		1644	clear_pending (EV_A_ (W)w);
		1645	if (expect_false (!ev_is_active (w)))
		1646	return;
		1647
1465	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));	1648	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1466	}
1467		1649
1468	void	1650	{
1469	ev_timer_stop (EV_P_ ev_timer *w)	1651	int active = ((W)w)->active;
1470	{
1471	ev_clear_pending (EV_A_ (W)w);
1472	if (expect_false (!ev_is_active (w)))
1473	return;
1474		1652
1475	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1476
1477	if (expect_true (((W)w)->active < timercnt--))	1653	if (expect_true (--active < --timercnt))
1478	{	1654	{
1479	timers [((W)w)->active - 1] = timers [timercnt];	1655	timers [active] = timers [timercnt];
1480	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	1656	adjustheap ((WT *)timers, timercnt, active);
1481	}	1657	}
		1658	}
1482		1659
1483	((WT)w)->at -= mn_now;	1660	((WT)w)->at -= mn_now;
1484		1661
1485	ev_stop (EV_A_ (W)w);	1662	ev_stop (EV_A_ (W)w);
1486	}	1663	}
1487		1664
1488	void	1665	void noinline
1489	ev_timer_again (EV_P_ ev_timer *w)	1666	ev_timer_again (EV_P_ ev_timer *w)
1490	{	1667	{
1491	if (ev_is_active (w))	1668	if (ev_is_active (w))
1492	{	1669	{
1493	if (w->repeat)	1670	if (w->repeat)
…		…
1504	ev_timer_start (EV_A_ w);	1681	ev_timer_start (EV_A_ w);
1505	}	1682	}
1506	}	1683	}
1507		1684
1508	#if EV_PERIODIC_ENABLE	1685	#if EV_PERIODIC_ENABLE
1509	void	1686	void noinline
1510	ev_periodic_start (EV_P_ ev_periodic *w)	1687	ev_periodic_start (EV_P_ ev_periodic *w)
1511	{	1688	{
1512	if (expect_false (ev_is_active (w)))	1689	if (expect_false (ev_is_active (w)))
1513	return;	1690	return;
1514		1691
…		…
1516	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	1693	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1517	else if (w->interval)	1694	else if (w->interval)
1518	{	1695	{
1519	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	1696	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1520	/* this formula differs from the one in periodic_reify because we do not always round up */	1697	/* this formula differs from the one in periodic_reify because we do not always round up */
1521	((WT)w)->at += ceil ((ev_rt_now - ((WT)w)->at) / w->interval) * w->interval;	1698	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1522	}	1699	}
		1700	else
		1701	((WT)w)->at = w->offset;
1523		1702
1524	ev_start (EV_A_ (W)w, ++periodiccnt);	1703	ev_start (EV_A_ (W)w, ++periodiccnt);
1525	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	1704	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);
1526	periodics [periodiccnt - 1] = w;	1705	periodics [periodiccnt - 1] = w;
1527	upheap ((WT *)periodics, periodiccnt - 1);	1706	upheap ((WT *)periodics, periodiccnt - 1);
1528		1707
		1708	/*assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));*/
		1709	}
		1710
		1711	void noinline
		1712	ev_periodic_stop (EV_P_ ev_periodic *w)
		1713	{
		1714	clear_pending (EV_A_ (W)w);
		1715	if (expect_false (!ev_is_active (w)))
		1716	return;
		1717
1529	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));	1718	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1530	}
1531		1719
1532	void	1720	{
1533	ev_periodic_stop (EV_P_ ev_periodic *w)	1721	int active = ((W)w)->active;
1534	{
1535	ev_clear_pending (EV_A_ (W)w);
1536	if (expect_false (!ev_is_active (w)))
1537	return;
1538		1722
1539	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1540
1541	if (expect_true (((W)w)->active < periodiccnt--))	1723	if (expect_true (--active < --periodiccnt))
1542	{	1724	{
1543	periodics [((W)w)->active - 1] = periodics [periodiccnt];	1725	periodics [active] = periodics [periodiccnt];
1544	adjustheap ((WT *)periodics, periodiccnt, ((W)w)->active - 1);	1726	adjustheap ((WT *)periodics, periodiccnt, active);
1545	}	1727	}
		1728	}
1546		1729
1547	ev_stop (EV_A_ (W)w);	1730	ev_stop (EV_A_ (W)w);
1548	}	1731	}
1549		1732
1550	void	1733	void noinline
1551	ev_periodic_again (EV_P_ ev_periodic *w)	1734	ev_periodic_again (EV_P_ ev_periodic *w)
1552	{	1735	{
1553	/* TODO: use adjustheap and recalculation */	1736	/* TODO: use adjustheap and recalculation */
1554	ev_periodic_stop (EV_A_ w);	1737	ev_periodic_stop (EV_A_ w);
1555	ev_periodic_start (EV_A_ w);	1738	ev_periodic_start (EV_A_ w);
1556	}	1739	}
1557	#endif	1740	#endif
1558		1741
1559	void
1560	ev_idle_start (EV_P_ ev_idle *w)
1561	{
1562	if (expect_false (ev_is_active (w)))
1563	return;
1564
1565	ev_start (EV_A_ (W)w, ++idlecnt);
1566	array_needsize (ev_idle *, idles, idlemax, idlecnt, EMPTY2);
1567	idles [idlecnt - 1] = w;
1568	}
1569
1570	void
1571	ev_idle_stop (EV_P_ ev_idle *w)
1572	{
1573	ev_clear_pending (EV_A_ (W)w);
1574	if (expect_false (!ev_is_active (w)))
1575	return;
1576
1577	{
1578	int active = ((W)w)->active;
1579	idles [active - 1] = idles [--idlecnt];
1580	((W)idles [active - 1])->active = active;
1581	}
1582
1583	ev_stop (EV_A_ (W)w);
1584	}
1585
1586	void
1587	ev_prepare_start (EV_P_ ev_prepare *w)
1588	{
1589	if (expect_false (ev_is_active (w)))
1590	return;
1591
1592	ev_start (EV_A_ (W)w, ++preparecnt);
1593	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
1594	prepares [preparecnt - 1] = w;
1595	}
1596
1597	void
1598	ev_prepare_stop (EV_P_ ev_prepare *w)
1599	{
1600	ev_clear_pending (EV_A_ (W)w);
1601	if (expect_false (!ev_is_active (w)))
1602	return;
1603
1604	{
1605	int active = ((W)w)->active;
1606	prepares [active - 1] = prepares [--preparecnt];
1607	((W)prepares [active - 1])->active = active;
1608	}
1609
1610	ev_stop (EV_A_ (W)w);
1611	}
1612
1613	void
1614	ev_check_start (EV_P_ ev_check *w)
1615	{
1616	if (expect_false (ev_is_active (w)))
1617	return;
1618
1619	ev_start (EV_A_ (W)w, ++checkcnt);
1620	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
1621	checks [checkcnt - 1] = w;
1622	}
1623
1624	void
1625	ev_check_stop (EV_P_ ev_check *w)
1626	{
1627	ev_clear_pending (EV_A_ (W)w);
1628	if (expect_false (!ev_is_active (w)))
1629	return;
1630
1631	{
1632	int active = ((W)w)->active;
1633	checks [active - 1] = checks [--checkcnt];
1634	((W)checks [active - 1])->active = active;
1635	}
1636
1637	ev_stop (EV_A_ (W)w);
1638	}
1639
1640	#ifndef SA_RESTART	1742	#ifndef SA_RESTART
1641	# define SA_RESTART 0	1743	# define SA_RESTART 0
1642	#endif	1744	#endif
1643		1745
1644	void	1746	void noinline
1645	ev_signal_start (EV_P_ ev_signal *w)	1747	ev_signal_start (EV_P_ ev_signal *w)
1646	{	1748	{
1647	#if EV_MULTIPLICITY	1749	#if EV_MULTIPLICITY
1648	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));	1750	assert (("signal watchers are only supported in the default loop", loop == ev_default_loop_ptr));
1649	#endif	1751	#endif
1650	if (expect_false (ev_is_active (w)))	1752	if (expect_false (ev_is_active (w)))
1651	return;	1753	return;
1652		1754
1653	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	1755	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1654		1756
		1757	{
		1758	#ifndef _WIN32
		1759	sigset_t full, prev;
		1760	sigfillset (&full);
		1761	sigprocmask (SIG_SETMASK, &full, &prev);
		1762	#endif
		1763
		1764	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		1765
		1766	#ifndef _WIN32
		1767	sigprocmask (SIG_SETMASK, &prev, 0);
		1768	#endif
		1769	}
		1770
1655	ev_start (EV_A_ (W)w, 1);	1771	ev_start (EV_A_ (W)w, 1);
1656	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1657	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	1772	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
1658		1773
1659	if (!((WL)w)->next)	1774	if (!((WL)w)->next)
1660	{	1775	{
1661	#if _WIN32	1776	#if _WIN32
…		…
1668	sigaction (w->signum, &sa, 0);	1783	sigaction (w->signum, &sa, 0);
1669	#endif	1784	#endif
1670	}	1785	}
1671	}	1786	}
1672		1787
1673	void	1788	void noinline
1674	ev_signal_stop (EV_P_ ev_signal *w)	1789	ev_signal_stop (EV_P_ ev_signal *w)
1675	{	1790	{
1676	ev_clear_pending (EV_A_ (W)w);	1791	clear_pending (EV_A_ (W)w);
1677	if (expect_false (!ev_is_active (w)))	1792	if (expect_false (!ev_is_active (w)))
1678	return;	1793	return;
1679		1794
1680	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	1795	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
1681	ev_stop (EV_A_ (W)w);	1796	ev_stop (EV_A_ (W)w);
…		…
1692	#endif	1807	#endif
1693	if (expect_false (ev_is_active (w)))	1808	if (expect_false (ev_is_active (w)))
1694	return;	1809	return;
1695		1810
1696	ev_start (EV_A_ (W)w, 1);	1811	ev_start (EV_A_ (W)w, 1);
1697	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1812	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1698	}	1813	}
1699		1814
1700	void	1815	void
1701	ev_child_stop (EV_P_ ev_child *w)	1816	ev_child_stop (EV_P_ ev_child *w)
1702	{	1817	{
1703	ev_clear_pending (EV_A_ (W)w);	1818	clear_pending (EV_A_ (W)w);
1704	if (expect_false (!ev_is_active (w)))	1819	if (expect_false (!ev_is_active (w)))
1705	return;	1820	return;
1706		1821
1707	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);	1822	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
		1823	ev_stop (EV_A_ (W)w);
		1824	}
		1825
		1826	#if EV_STAT_ENABLE
		1827
		1828	# ifdef _WIN32
		1829	# undef lstat
		1830	# define lstat(a,b) _stati64 (a,b)
		1831	# endif
		1832
		1833	#define DEF_STAT_INTERVAL 5.0074891
		1834	#define MIN_STAT_INTERVAL 0.1074891
		1835
		1836	static void noinline stat_timer_cb (EV_P_ ev_timer *w_, int revents);
		1837
		1838	#if EV_USE_INOTIFY
		1839	# define EV_INOTIFY_BUFSIZE 8192
		1840
		1841	static void noinline
		1842	infy_add (EV_P_ ev_stat *w)
		1843	{
		1844	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);
		1845
		1846	if (w->wd < 0)
		1847	{
		1848	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
		1849
		1850	/* monitor some parent directory for speedup hints */
		1851	if ((errno == ENOENT || errno == EACCES) && strlen (w->path) < 4096)
		1852	{
		1853	char path [4096];
		1854	strcpy (path, w->path);
		1855
		1856	do
		1857	{
		1858	int mask = IN_MASK_ADD | IN_DELETE_SELF | IN_MOVE_SELF
		1859	| (errno == EACCES ? IN_ATTRIB : IN_CREATE | IN_MOVED_TO);
		1860
		1861	char *pend = strrchr (path, '/');
		1862
		1863	if (!pend)
		1864	break; /* whoops, no '/', complain to your admin */
		1865
		1866	*pend = 0;
		1867	w->wd = inotify_add_watch (fs_fd, path, mask);
		1868	}
		1869	while (w->wd < 0 && (errno == ENOENT || errno == EACCES));
		1870	}
		1871	}
		1872	else
		1873	ev_timer_stop (EV_A_ &w->timer); /* we can watch this in a race-free way */
		1874
		1875	if (w->wd >= 0)
		1876	wlist_add (&fs_hash [w->wd & (EV_INOTIFY_HASHSIZE - 1)].head, (WL)w);
		1877	}
		1878
		1879	static void noinline
		1880	infy_del (EV_P_ ev_stat *w)
		1881	{
		1882	int slot;
		1883	int wd = w->wd;
		1884
		1885	if (wd < 0)
		1886	return;
		1887
		1888	w->wd = -2;
		1889	slot = wd & (EV_INOTIFY_HASHSIZE - 1);
		1890	wlist_del (&fs_hash [slot].head, (WL)w);
		1891
		1892	/* remove this watcher, if others are watching it, they will rearm */
		1893	inotify_rm_watch (fs_fd, wd);
		1894	}
		1895
		1896	static void noinline
		1897	infy_wd (EV_P_ int slot, int wd, struct inotify_event *ev)
		1898	{
		1899	if (slot < 0)
		1900	/* overflow, need to check for all hahs slots */
		1901	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1902	infy_wd (EV_A_ slot, wd, ev);
		1903	else
		1904	{
		1905	WL w_;
		1906
		1907	for (w_ = fs_hash [slot & (EV_INOTIFY_HASHSIZE - 1)].head; w_; )
		1908	{
		1909	ev_stat *w = (ev_stat *)w_;
		1910	w_ = w_->next; /* lets us remove this watcher and all before it */
		1911
		1912	if (w->wd == wd || wd == -1)
		1913	{
		1914	if (ev->mask & (IN_IGNORED | IN_UNMOUNT | IN_DELETE_SELF))
		1915	{
		1916	w->wd = -1;
		1917	infy_add (EV_A_ w); /* re-add, no matter what */
		1918	}
		1919
		1920	stat_timer_cb (EV_A_ &w->timer, 0);
		1921	}
		1922	}
		1923	}
		1924	}
		1925
		1926	static void
		1927	infy_cb (EV_P_ ev_io *w, int revents)
		1928	{
		1929	char buf [EV_INOTIFY_BUFSIZE];
		1930	struct inotify_event *ev = (struct inotify_event *)buf;
		1931	int ofs;
		1932	int len = read (fs_fd, buf, sizeof (buf));
		1933
		1934	for (ofs = 0; ofs < len; ofs += sizeof (struct inotify_event) + ev->len)
		1935	infy_wd (EV_A_ ev->wd, ev->wd, ev);
		1936	}
		1937
		1938	void inline_size
		1939	infy_init (EV_P)
		1940	{
		1941	if (fs_fd != -2)
		1942	return;
		1943
		1944	fs_fd = inotify_init ();
		1945
		1946	if (fs_fd >= 0)
		1947	{
		1948	ev_io_init (&fs_w, infy_cb, fs_fd, EV_READ);
		1949	ev_set_priority (&fs_w, EV_MAXPRI);
		1950	ev_io_start (EV_A_ &fs_w);
		1951	}
		1952	}
		1953
		1954	void inline_size
		1955	infy_fork (EV_P)
		1956	{
		1957	int slot;
		1958
		1959	if (fs_fd < 0)
		1960	return;
		1961
		1962	close (fs_fd);
		1963	fs_fd = inotify_init ();
		1964
		1965	for (slot = 0; slot < EV_INOTIFY_HASHSIZE; ++slot)
		1966	{
		1967	WL w_ = fs_hash [slot].head;
		1968	fs_hash [slot].head = 0;
		1969
		1970	while (w_)
		1971	{
		1972	ev_stat *w = (ev_stat *)w_;
		1973	w_ = w_->next; /* lets us add this watcher */
		1974
		1975	w->wd = -1;
		1976
		1977	if (fs_fd >= 0)
		1978	infy_add (EV_A_ w); /* re-add, no matter what */
		1979	else
		1980	ev_timer_start (EV_A_ &w->timer);
		1981	}
		1982
		1983	}
		1984	}
		1985
		1986	#endif
		1987
		1988	void
		1989	ev_stat_stat (EV_P_ ev_stat *w)
		1990	{
		1991	if (lstat (w->path, &w->attr) < 0)
		1992	w->attr.st_nlink = 0;
		1993	else if (!w->attr.st_nlink)
		1994	w->attr.st_nlink = 1;
		1995	}
		1996
		1997	static void noinline
		1998	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
		1999	{
		2000	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
		2001
		2002	/* we copy this here each the time so that */
		2003	/* prev has the old value when the callback gets invoked */
		2004	w->prev = w->attr;
		2005	ev_stat_stat (EV_A_ w);
		2006
		2007	/* memcmp doesn't work on netbsd, they.... do stuff to their struct stat */
		2008	if (
		2009	w->prev.st_dev != w->attr.st_dev
		2010	|| w->prev.st_ino != w->attr.st_ino
		2011	|| w->prev.st_mode != w->attr.st_mode
		2012	|| w->prev.st_nlink != w->attr.st_nlink
		2013	|| w->prev.st_uid != w->attr.st_uid
		2014	|| w->prev.st_gid != w->attr.st_gid
		2015	|| w->prev.st_rdev != w->attr.st_rdev
		2016	|| w->prev.st_size != w->attr.st_size
		2017	|| w->prev.st_atime != w->attr.st_atime
		2018	|| w->prev.st_mtime != w->attr.st_mtime
		2019	|| w->prev.st_ctime != w->attr.st_ctime
		2020	) {
		2021	#if EV_USE_INOTIFY
		2022	infy_del (EV_A_ w);
		2023	infy_add (EV_A_ w);
		2024	ev_stat_stat (EV_A_ w); /* avoid race... */
		2025	#endif
		2026
		2027	ev_feed_event (EV_A_ w, EV_STAT);
		2028	}
		2029	}
		2030
		2031	void
		2032	ev_stat_start (EV_P_ ev_stat *w)
		2033	{
		2034	if (expect_false (ev_is_active (w)))
		2035	return;
		2036
		2037	/* since we use memcmp, we need to clear any padding data etc. */
		2038	memset (&w->prev, 0, sizeof (ev_statdata));
		2039	memset (&w->attr, 0, sizeof (ev_statdata));
		2040
		2041	ev_stat_stat (EV_A_ w);
		2042
		2043	if (w->interval < MIN_STAT_INTERVAL)
		2044	w->interval = w->interval ? MIN_STAT_INTERVAL : DEF_STAT_INTERVAL;
		2045
		2046	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
		2047	ev_set_priority (&w->timer, ev_priority (w));
		2048
		2049	#if EV_USE_INOTIFY
		2050	infy_init (EV_A);
		2051
		2052	if (fs_fd >= 0)
		2053	infy_add (EV_A_ w);
		2054	else
		2055	#endif
		2056	ev_timer_start (EV_A_ &w->timer);
		2057
		2058	ev_start (EV_A_ (W)w, 1);
		2059	}
		2060
		2061	void
		2062	ev_stat_stop (EV_P_ ev_stat *w)
		2063	{
		2064	clear_pending (EV_A_ (W)w);
		2065	if (expect_false (!ev_is_active (w)))
		2066	return;
		2067
		2068	#if EV_USE_INOTIFY
		2069	infy_del (EV_A_ w);
		2070	#endif
		2071	ev_timer_stop (EV_A_ &w->timer);
		2072
		2073	ev_stop (EV_A_ (W)w);
		2074	}
		2075	#endif
		2076
		2077	#if EV_IDLE_ENABLE
		2078	void
		2079	ev_idle_start (EV_P_ ev_idle *w)
		2080	{
		2081	if (expect_false (ev_is_active (w)))
		2082	return;
		2083
		2084	pri_adjust (EV_A_ (W)w);
		2085
		2086	{
		2087	int active = ++idlecnt [ABSPRI (w)];
		2088
		2089	++idleall;
		2090	ev_start (EV_A_ (W)w, active);
		2091
		2092	array_needsize (ev_idle *, idles [ABSPRI (w)], idlemax [ABSPRI (w)], active, EMPTY2);
		2093	idles [ABSPRI (w)][active - 1] = w;
		2094	}
		2095	}
		2096
		2097	void
		2098	ev_idle_stop (EV_P_ ev_idle *w)
		2099	{
		2100	clear_pending (EV_A_ (W)w);
		2101	if (expect_false (!ev_is_active (w)))
		2102	return;
		2103
		2104	{
		2105	int active = ((W)w)->active;
		2106
		2107	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
		2108	((W)idles [ABSPRI (w)][active - 1])->active = active;
		2109
		2110	ev_stop (EV_A_ (W)w);
		2111	--idleall;
		2112	}
		2113	}
		2114	#endif
		2115
		2116	void
		2117	ev_prepare_start (EV_P_ ev_prepare *w)
		2118	{
		2119	if (expect_false (ev_is_active (w)))
		2120	return;
		2121
		2122	ev_start (EV_A_ (W)w, ++preparecnt);
		2123	array_needsize (ev_prepare *, prepares, preparemax, preparecnt, EMPTY2);
		2124	prepares [preparecnt - 1] = w;
		2125	}
		2126
		2127	void
		2128	ev_prepare_stop (EV_P_ ev_prepare *w)
		2129	{
		2130	clear_pending (EV_A_ (W)w);
		2131	if (expect_false (!ev_is_active (w)))
		2132	return;
		2133
		2134	{
		2135	int active = ((W)w)->active;
		2136	prepares [active - 1] = prepares [--preparecnt];
		2137	((W)prepares [active - 1])->active = active;
		2138	}
		2139
		2140	ev_stop (EV_A_ (W)w);
		2141	}
		2142
		2143	void
		2144	ev_check_start (EV_P_ ev_check *w)
		2145	{
		2146	if (expect_false (ev_is_active (w)))
		2147	return;
		2148
		2149	ev_start (EV_A_ (W)w, ++checkcnt);
		2150	array_needsize (ev_check *, checks, checkmax, checkcnt, EMPTY2);
		2151	checks [checkcnt - 1] = w;
		2152	}
		2153
		2154	void
		2155	ev_check_stop (EV_P_ ev_check *w)
		2156	{
		2157	clear_pending (EV_A_ (W)w);
		2158	if (expect_false (!ev_is_active (w)))
		2159	return;
		2160
		2161	{
		2162	int active = ((W)w)->active;
		2163	checks [active - 1] = checks [--checkcnt];
		2164	((W)checks [active - 1])->active = active;
		2165	}
		2166
1708	ev_stop (EV_A_ (W)w);	2167	ev_stop (EV_A_ (W)w);
1709	}	2168	}
1710		2169
1711	#if EV_EMBED_ENABLE	2170	#if EV_EMBED_ENABLE
1712	void noinline	2171	void noinline
…		…
1745	}	2204	}
1746		2205
1747	void	2206	void
1748	ev_embed_stop (EV_P_ ev_embed *w)	2207	ev_embed_stop (EV_P_ ev_embed *w)
1749	{	2208	{
1750	ev_clear_pending (EV_A_ (W)w);	2209	clear_pending (EV_A_ (W)w);
1751	if (expect_false (!ev_is_active (w)))	2210	if (expect_false (!ev_is_active (w)))
1752	return;	2211	return;
1753		2212
1754	ev_io_stop (EV_A_ &w->io);	2213	ev_io_stop (EV_A_ &w->io);
1755		2214
1756	ev_stop (EV_A_ (W)w);	2215	ev_stop (EV_A_ (W)w);
1757	}	2216	}
1758	#endif	2217	#endif
1759		2218
1760	#if EV_STAT_ENABLE	2219	#if EV_FORK_ENABLE
1761
1762	# ifdef _WIN32
1763	# define lstat(a,b) stat(a,b)
1764	# endif
1765
1766	void	2220	void
1767	ev_stat_stat (EV_P_ ev_stat *w)
1768	{
1769	if (lstat (w->path, &w->attr) < 0)
1770	w->attr.st_nlink = 0;
1771	else if (!w->attr.st_nlink)
1772	w->attr.st_nlink = 1;
1773	}
1774
1775	static void
1776	stat_timer_cb (EV_P_ ev_timer *w_, int revents)
1777	{
1778	ev_stat *w = (ev_stat *)(((char *)w_) - offsetof (ev_stat, timer));
1779
1780	/* we copy this here each the time so that */
1781	/* prev has the old value when the callback gets invoked */
1782	w->prev = w->attr;
1783	ev_stat_stat (EV_A_ w);
1784
1785	if (memcmp (&w->prev, &w->attr, sizeof (ev_statdata)))
1786	ev_feed_event (EV_A_ w, EV_STAT);
1787	}
1788
1789	void
1790	ev_stat_start (EV_P_ ev_stat *w)	2221	ev_fork_start (EV_P_ ev_fork *w)
1791	{	2222	{
1792	if (expect_false (ev_is_active (w)))	2223	if (expect_false (ev_is_active (w)))
1793	return;	2224	return;
1794		2225
1795	/* since we use memcmp, we need to clear any padding data etc. */
1796	memset (&w->prev, 0, sizeof (ev_statdata));
1797	memset (&w->attr, 0, sizeof (ev_statdata));
1798
1799	ev_stat_stat (EV_A_ w);
1800
1801	ev_timer_init (&w->timer, stat_timer_cb, w->interval, w->interval);
1802	ev_set_priority (&w->timer, ev_priority (w));
1803	ev_timer_start (EV_A_ &w->timer);
1804
1805	ev_start (EV_A_ (W)w, 1);	2226	ev_start (EV_A_ (W)w, ++forkcnt);
		2227	array_needsize (ev_fork *, forks, forkmax, forkcnt, EMPTY2);
		2228	forks [forkcnt - 1] = w;
1806	}	2229	}
1807		2230
1808	void	2231	void
1809	ev_stat_stop (EV_P_ ev_stat *w)	2232	ev_fork_stop (EV_P_ ev_fork *w)
1810	{	2233	{
1811	ev_clear_pending (EV_A_ (W)w);	2234	clear_pending (EV_A_ (W)w);
1812	if (expect_false (!ev_is_active (w)))	2235	if (expect_false (!ev_is_active (w)))
1813	return;	2236	return;
1814		2237
1815	ev_timer_stop (EV_A_ &w->timer);	2238	{
		2239	int active = ((W)w)->active;
		2240	forks [active - 1] = forks [--forkcnt];
		2241	((W)forks [active - 1])->active = active;
		2242	}
1816		2243
1817	ev_stop (EV_A_ (W)w);	2244	ev_stop (EV_A_ (W)w);
1818	}	2245	}
1819	#endif	2246	#endif
1820		2247

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