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

Comparing libev/ev.c (file contents):
Revision 1.173 by root, Sun Dec 9 19:42:57 2007 UTC vs.
Revision 1.247 by root, Wed May 21 21:22:10 2008 UTC

…		…
1	/*	1	/*
2	* libev event processing core, watcher management	2	* libev event processing core, watcher management
3	*	3	*
4	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>	4	* Copyright (c) 2007,2008 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.	5	* All rights reserved.
6	*	6	*
7	* Redistribution and use in source and binary forms, with or without	7	* Redistribution and use in source and binary forms, with or without modifica-
8	* modification, are permitted provided that the following conditions are	8	* tion, are permitted provided that the following conditions are met:
9	* met:	9	*
		10	* 1. Redistributions of source code must retain the above copyright notice,
		11	* this list of conditions and the following disclaimer.
		12	*
		13	* 2. Redistributions in binary form must reproduce the above copyright
		14	* notice, this list of conditions and the following disclaimer in the
		15	* documentation and/or other materials provided with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
		18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
		19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
		20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
		21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
		22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
		23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
		24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
		25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
		26	* OF THE POSSIBILITY OF SUCH DAMAGE.
10	*	27	*
11	* * Redistributions of source code must retain the above copyright	28	* Alternatively, the contents of this file may be used under the terms of
12	* notice, this list of conditions and the following disclaimer.	29	* the GNU General Public License ("GPL") version 2 or any later version,
13	*	30	* in which case the provisions of the GPL are applicable instead of
14	* * Redistributions in binary form must reproduce the above	31	* the above. If you wish to allow the use of your version of this file
15	* copyright notice, this list of conditions and the following	32	* only under the terms of the GPL and not to allow others to use your
16	* disclaimer in the documentation and/or other materials provided	33	* version of this file under the BSD license, indicate your decision
17	* with the distribution.	34	* by deleting the provisions above and replace them with the notice
18	*	35	* and other provisions required by the GPL. If you do not delete the
19	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS	36	* provisions above, a recipient may use your version of this file under
20	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT	37	* either the BSD or the GPL.
21	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	*/	38	*/
31		39
32	#ifdef __cplusplus	40	#ifdef __cplusplus
33	extern "C" {	41	extern "C" {
34	#endif	42	#endif
35		43
		44	/* this big block deduces configuration from config.h */
36	#ifndef EV_STANDALONE	45	#ifndef EV_STANDALONE
37	# ifdef EV_CONFIG_H	46	# ifdef EV_CONFIG_H
38	# include EV_CONFIG_H	47	# include EV_CONFIG_H
39	# else	48	# else
40	# include "config.h"	49	# include "config.h"
51	# ifndef EV_USE_MONOTONIC	60	# ifndef EV_USE_MONOTONIC
52	# define EV_USE_MONOTONIC 0	61	# define EV_USE_MONOTONIC 0
53	# endif	62	# endif
54	# ifndef EV_USE_REALTIME	63	# ifndef EV_USE_REALTIME
55	# define EV_USE_REALTIME 0	64	# define EV_USE_REALTIME 0
		65	# endif
		66	# endif
		67
		68	# ifndef EV_USE_NANOSLEEP
		69	# if HAVE_NANOSLEEP
		70	# define EV_USE_NANOSLEEP 1
		71	# else
		72	# define EV_USE_NANOSLEEP 0
56	# endif	73	# endif
57	# endif	74	# endif
58		75
59	# ifndef EV_USE_SELECT	76	# ifndef EV_USE_SELECT
60	# if HAVE_SELECT && HAVE_SYS_SELECT_H	77	# if HAVE_SELECT && HAVE_SYS_SELECT_H
…		…
102	# else	119	# else
103	# define EV_USE_INOTIFY 0	120	# define EV_USE_INOTIFY 0
104	# endif	121	# endif
105	# endif	122	# endif
106		123
		124	# ifndef EV_USE_EVENTFD
		125	# if HAVE_EVENTFD
		126	# define EV_USE_EVENTFD 1
		127	# else
		128	# define EV_USE_EVENTFD 0
		129	# endif
		130	# endif
		131
107	#endif	132	#endif
108		133
109	#include <math.h>	134	#include <math.h>
110	#include <stdlib.h>	135	#include <stdlib.h>
111	#include <fcntl.h>	136	#include <fcntl.h>
…		…
136	# ifndef EV_SELECT_IS_WINSOCKET	161	# ifndef EV_SELECT_IS_WINSOCKET
137	# define EV_SELECT_IS_WINSOCKET 1	162	# define EV_SELECT_IS_WINSOCKET 1
138	# endif	163	# endif
139	#endif	164	#endif
140		165
141	/**/	166	/* this block tries to deduce configuration from header-defined symbols and defaults */
142		167
143	#ifndef EV_USE_MONOTONIC	168	#ifndef EV_USE_MONOTONIC
144	# define EV_USE_MONOTONIC 0	169	# define EV_USE_MONOTONIC 0
145	#endif	170	#endif
146		171
147	#ifndef EV_USE_REALTIME	172	#ifndef EV_USE_REALTIME
148	# define EV_USE_REALTIME 0	173	# define EV_USE_REALTIME 0
		174	#endif
		175
		176	#ifndef EV_USE_NANOSLEEP
		177	# define EV_USE_NANOSLEEP 0
149	#endif	178	#endif
150		179
151	#ifndef EV_USE_SELECT	180	#ifndef EV_USE_SELECT
152	# define EV_USE_SELECT 1	181	# define EV_USE_SELECT 1
153	#endif	182	#endif
…		…
159	# define EV_USE_POLL 1	188	# define EV_USE_POLL 1
160	# endif	189	# endif
161	#endif	190	#endif
162		191
163	#ifndef EV_USE_EPOLL	192	#ifndef EV_USE_EPOLL
		193	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		194	# define EV_USE_EPOLL 1
		195	# else
164	# define EV_USE_EPOLL 0	196	# define EV_USE_EPOLL 0
		197	# endif
165	#endif	198	#endif
166		199
167	#ifndef EV_USE_KQUEUE	200	#ifndef EV_USE_KQUEUE
168	# define EV_USE_KQUEUE 0	201	# define EV_USE_KQUEUE 0
169	#endif	202	#endif
…		…
171	#ifndef EV_USE_PORT	204	#ifndef EV_USE_PORT
172	# define EV_USE_PORT 0	205	# define EV_USE_PORT 0
173	#endif	206	#endif
174		207
175	#ifndef EV_USE_INOTIFY	208	#ifndef EV_USE_INOTIFY
		209	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 4))
		210	# define EV_USE_INOTIFY 1
		211	# else
176	# define EV_USE_INOTIFY 0	212	# define EV_USE_INOTIFY 0
		213	# endif
177	#endif	214	#endif
178		215
179	#ifndef EV_PID_HASHSIZE	216	#ifndef EV_PID_HASHSIZE
180	# if EV_MINIMAL	217	# if EV_MINIMAL
181	# define EV_PID_HASHSIZE 1	218	# define EV_PID_HASHSIZE 1
…		…
190	# else	227	# else
191	# define EV_INOTIFY_HASHSIZE 16	228	# define EV_INOTIFY_HASHSIZE 16
192	# endif	229	# endif
193	#endif	230	#endif
194		231
195	/**/	232	#ifndef EV_USE_EVENTFD
		233	# if __linux && (__GLIBC__ > 2 \|\| (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 7))
		234	# define EV_USE_EVENTFD 1
		235	# else
		236	# define EV_USE_EVENTFD 0
		237	# endif
		238	#endif
		239
		240	#ifndef EV_USE_4HEAP
		241	# define EV_USE_4HEAP !EV_MINIMAL
		242	#endif
		243
		244	#ifndef EV_HEAP_CACHE_AT
		245	# define EV_HEAP_CACHE_AT !EV_MINIMAL
		246	#endif
		247
		248	/* this block fixes any misconfiguration where we know we run into trouble otherwise */
196		249
197	#ifndef CLOCK_MONOTONIC	250	#ifndef CLOCK_MONOTONIC
198	# undef EV_USE_MONOTONIC	251	# undef EV_USE_MONOTONIC
199	# define EV_USE_MONOTONIC 0	252	# define EV_USE_MONOTONIC 0
200	#endif	253	#endif
…		…
202	#ifndef CLOCK_REALTIME	255	#ifndef CLOCK_REALTIME
203	# undef EV_USE_REALTIME	256	# undef EV_USE_REALTIME
204	# define EV_USE_REALTIME 0	257	# define EV_USE_REALTIME 0
205	#endif	258	#endif
206		259
		260	#if !EV_STAT_ENABLE
		261	# undef EV_USE_INOTIFY
		262	# define EV_USE_INOTIFY 0
		263	#endif
		264
		265	#if !EV_USE_NANOSLEEP
		266	# ifndef _WIN32
		267	# include <sys/select.h>
		268	# endif
		269	#endif
		270
		271	#if EV_USE_INOTIFY
		272	# include <sys/inotify.h>
		273	#endif
		274
207	#if EV_SELECT_IS_WINSOCKET	275	#if EV_SELECT_IS_WINSOCKET
208	# include <winsock.h>	276	# include <winsock.h>
209	#endif	277	#endif
210		278
211	#if !EV_STAT_ENABLE	279	#if EV_USE_EVENTFD
212	# define EV_USE_INOTIFY 0	280	/* our minimum requirement is glibc 2.7 which has the stub, but not the header */
		281	# include <stdint.h>
		282	# ifdef __cplusplus
		283	extern "C" {
213	#endif	284	# endif
214		285	int eventfd (unsigned int initval, int flags);
215	#if EV_USE_INOTIFY	286	# ifdef __cplusplus
216	# include <sys/inotify.h>	287	}
		288	# endif
217	#endif	289	#endif
218		290
219	/**/	291	/**/
		292
		293	/*
		294	* This is used to avoid floating point rounding problems.
		295	* It is added to ev_rt_now when scheduling periodics
		296	* to ensure progress, time-wise, even when rounding
		297	* errors are against us.
		298	* This value is good at least till the year 4000.
		299	* Better solutions welcome.
		300	*/
		301	#define TIME_EPSILON 0.0001220703125 /* 1/8192 */
220		302
221	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */	303	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
222	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */	304	#define MAX_BLOCKTIME 59.743 /* never wait longer than this time (to detect time jumps) */
223	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds */	305	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
224		306
225	#if __GNUC__ >= 3	307	#if __GNUC__ >= 4
226	# define expect(expr,value) __builtin_expect ((expr),(value))	308	# define expect(expr,value) __builtin_expect ((expr),(value))
227	# define noinline __attribute__ ((noinline))	309	# define noinline __attribute__ ((noinline))
228	#else	310	#else
229	# define expect(expr,value) (expr)	311	# define expect(expr,value) (expr)
230	# define noinline	312	# define noinline
231	# if __STDC_VERSION__ < 199901L	313	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
232	# define inline	314	# define inline
233	# endif	315	# endif
234	#endif	316	#endif
235		317
236	#define expect_false(expr) expect ((expr) != 0, 0)	318	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
251		333
252	typedef ev_watcher *W;	334	typedef ev_watcher *W;
253	typedef ev_watcher_list *WL;	335	typedef ev_watcher_list *WL;
254	typedef ev_watcher_time *WT;	336	typedef ev_watcher_time *WT;
255		337
		338	#define ev_active(w) ((W)(w))->active
		339	#define ev_at(w) ((WT)(w))->at
		340
		341	#if EV_USE_MONOTONIC
		342	/* sig_atomic_t is used to avoid per-thread variables or locking but still */
		343	/* giving it a reasonably high chance of working on typical architetcures */
256	static int have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */	344	static EV_ATOMIC_T have_monotonic; /* did clock_gettime (CLOCK_MONOTONIC) work? */
		345	#endif
257		346
258	#ifdef _WIN32	347	#ifdef _WIN32
259	# include "ev_win32.c"	348	# include "ev_win32.c"
260	#endif	349	#endif
261		350
…		…
282	perror (msg);	371	perror (msg);
283	abort ();	372	abort ();
284	}	373	}
285	}	374	}
286		375
		376	static void *
		377	ev_realloc_emul (void *ptr, long size)
		378	{
		379	/* some systems, notably openbsd and darwin, fail to properly
		380	* implement realloc (x, 0) (as required by both ansi c-98 and
		381	* the single unix specification, so work around them here.
		382	*/
		383
		384	if (size)
		385	return realloc (ptr, size);
		386
		387	free (ptr);
		388	return 0;
		389	}
		390
287	static void (alloc)(void *ptr, long size);	391	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
288		392
289	void	393	void
290	ev_set_allocator (void (cb)(void *ptr, long size))	394	ev_set_allocator (void (cb)(void *ptr, long size))
291	{	395	{
292	alloc = cb;	396	alloc = cb;
293	}	397	}
294		398
295	inline_speed void *	399	inline_speed void *
296	ev_realloc (void *ptr, long size)	400	ev_realloc (void *ptr, long size)
297	{	401	{
298	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	402	ptr = alloc (ptr, size);
299		403
300	if (!ptr && size)	404	if (!ptr && size)
301	{	405	{
302	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	406	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
303	abort ();	407	abort ();
…		…
326	W w;	430	W w;
327	int events;	431	int events;
328	} ANPENDING;	432	} ANPENDING;
329		433
330	#if EV_USE_INOTIFY	434	#if EV_USE_INOTIFY
		435	/* hash table entry per inotify-id */
331	typedef struct	436	typedef struct
332	{	437	{
333	WL head;	438	WL head;
334	} ANFS;	439	} ANFS;
		440	#endif
		441
		442	/* Heap Entry */
		443	#if EV_HEAP_CACHE_AT
		444	typedef struct {
		445	ev_tstamp at;
		446	WT w;
		447	} ANHE;
		448
		449	#define ANHE_w(he) (he).w /* access watcher, read-write */
		450	#define ANHE_at(he) (he).at /* access cached at, read-only */
		451	#define ANHE_at_set(he) (he).at = (he).w->at /* update at from watcher */
		452	#else
		453	typedef WT ANHE;
		454
		455	#define ANHE_w(he) (he)
		456	#define ANHE_at(he) (he)->at
		457	#define ANHE_at_set(he)
335	#endif	458	#endif
336		459
337	#if EV_MULTIPLICITY	460	#if EV_MULTIPLICITY
338		461
339	struct ev_loop	462	struct ev_loop
…		…
397	{	520	{
398	return ev_rt_now;	521	return ev_rt_now;
399	}	522	}
400	#endif	523	#endif
401		524
		525	void
		526	ev_sleep (ev_tstamp delay)
		527	{
		528	if (delay > 0.)
		529	{
		530	#if EV_USE_NANOSLEEP
		531	struct timespec ts;
		532
		533	ts.tv_sec = (time_t)delay;
		534	ts.tv_nsec = (long)((delay - (ev_tstamp)(ts.tv_sec)) * 1e9);
		535
		536	nanosleep (&ts, 0);
		537	#elif defined(_WIN32)
		538	Sleep ((unsigned long)(delay * 1e3));
		539	#else
		540	struct timeval tv;
		541
		542	tv.tv_sec = (time_t)delay;
		543	tv.tv_usec = (long)((delay - (ev_tstamp)(tv.tv_sec)) * 1e6);
		544
		545	select (0, 0, 0, 0, &tv);
		546	#endif
		547	}
		548	}
		549
		550	/*****************************************************************************/
		551
		552	#define MALLOC_ROUND 4096 /* prefer to allocate in chunks of this size, must be 2*n and >> 4 longs /
		553
402	int inline_size	554	int inline_size
403	array_nextsize (int elem, int cur, int cnt)	555	array_nextsize (int elem, int cur, int cnt)
404	{	556	{
405	int ncur = cur + 1;	557	int ncur = cur + 1;
406		558
407	do	559	do
408	ncur <<= 1;	560	ncur <<= 1;
409	while (cnt > ncur);	561	while (cnt > ncur);
410		562
411	/* if size > 4096, round to 4096 - 4 * longs to accomodate malloc overhead */	563	/* if size is large, round to MALLOC_ROUND - 4 * longs to accomodate malloc overhead */
412	if (elem * ncur > 4096)	564	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
413	{	565	{
414	ncur *= elem;	566	ncur *= elem;
415	ncur = (ncur + elem + 4095 + sizeof (void ) 4) & ~4095;	567	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
416	ncur = ncur - sizeof (void ) 4;	568	ncur = ncur - sizeof (void ) 4;
417	ncur /= elem;	569	ncur /= elem;
418	}	570	}
419		571
420	return ncur;	572	return ncur;
…		…
466	pendings [pri][w_->pending - 1].w = w_;	618	pendings [pri][w_->pending - 1].w = w_;
467	pendings [pri][w_->pending - 1].events = revents;	619	pendings [pri][w_->pending - 1].events = revents;
468	}	620	}
469	}	621	}
470		622
471	void inline_size	623	void inline_speed
472	queue_events (EV_P_ W *events, int eventcnt, int type)	624	queue_events (EV_P_ W *events, int eventcnt, int type)
473	{	625	{
474	int i;	626	int i;
475		627
476	for (i = 0; i < eventcnt; ++i)	628	for (i = 0; i < eventcnt; ++i)
…		…
523	{	675	{
524	int fd = fdchanges [i];	676	int fd = fdchanges [i];
525	ANFD *anfd = anfds + fd;	677	ANFD *anfd = anfds + fd;
526	ev_io *w;	678	ev_io *w;
527		679
528	int events = 0;	680	unsigned char events = 0;
529		681
530	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)	682	for (w = (ev_io )anfd->head; w; w = (ev_io )((WL)w)->next)
531	events \|= w->events;	683	events \|= (unsigned char)w->events;
532		684
533	#if EV_SELECT_IS_WINSOCKET	685	#if EV_SELECT_IS_WINSOCKET
534	if (events)	686	if (events)
535	{	687	{
536	unsigned long argp;	688	unsigned long argp;
		689	#ifdef EV_FD_TO_WIN32_HANDLE
		690	anfd->handle = EV_FD_TO_WIN32_HANDLE (fd);
		691	#else
537	anfd->handle = _get_osfhandle (fd);	692	anfd->handle = _get_osfhandle (fd);
		693	#endif
538	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));	694	assert (("libev only supports socket fds in this configuration", ioctlsocket (anfd->handle, FIONREAD, &argp) == 0));
539	}	695	}
540	#endif	696	#endif
541		697
		698	{
		699	unsigned char o_events = anfd->events;
		700	unsigned char o_reify = anfd->reify;
		701
542	anfd->reify = 0;	702	anfd->reify = 0;
543
544	backend_modify (EV_A_ fd, anfd->events, events);
545	anfd->events = events;	703	anfd->events = events;
		704
		705	if (o_events != events \|\| o_reify & EV_IOFDSET)
		706	backend_modify (EV_A_ fd, o_events, events);
		707	}
546	}	708	}
547		709
548	fdchangecnt = 0;	710	fdchangecnt = 0;
549	}	711	}
550		712
551	void inline_size	713	void inline_size
552	fd_change (EV_P_ int fd)	714	fd_change (EV_P_ int fd, int flags)
553	{	715	{
554	if (expect_false (anfds [fd].reify))	716	unsigned char reify = anfds [fd].reify;
555	return;
556
557	anfds [fd].reify = 1;	717	anfds [fd].reify \|= flags;
558		718
		719	if (expect_true (!reify))
		720	{
559	++fdchangecnt;	721	++fdchangecnt;
560	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	722	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
561	fdchanges [fdchangecnt - 1] = fd;	723	fdchanges [fdchangecnt - 1] = fd;
		724	}
562	}	725	}
563		726
564	void inline_speed	727	void inline_speed
565	fd_kill (EV_P_ int fd)	728	fd_kill (EV_P_ int fd)
566	{	729	{
…		…
617		780
618	for (fd = 0; fd < anfdmax; ++fd)	781	for (fd = 0; fd < anfdmax; ++fd)
619	if (anfds [fd].events)	782	if (anfds [fd].events)
620	{	783	{
621	anfds [fd].events = 0;	784	anfds [fd].events = 0;
622	fd_change (EV_A_ fd);	785	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
623	}	786	}
624	}	787	}
625		788
626	/*****************************************************************************/	789	/*****************************************************************************/
627		790
		791	/*
		792	* the heap functions want a real array index. array index 0 uis guaranteed to not
		793	* be in-use at any time. the first heap entry is at array [HEAP0]. DHEAP gives
		794	* the branching factor of the d-tree.
		795	*/
		796
		797	/*
		798	* at the moment we allow libev the luxury of two heaps,
		799	* a small-code-size 2-heap one and a ~1.5kb larger 4-heap
		800	* which is more cache-efficient.
		801	* the difference is about 5% with 50000+ watchers.
		802	*/
		803	#if EV_USE_4HEAP
		804
		805	#define DHEAP 4
		806	#define HEAP0 (DHEAP - 1) /* index of first element in heap */
		807	#define HPARENT(k) ((((k) - HEAP0 - 1) / DHEAP) + HEAP0)
		808
		809	/* towards the root */
628	void inline_speed	810	void inline_speed
629	upheap (WT *heap, int k)	811	upheap (ANHE *heap, int k)
630	{	812	{
631	WT w = heap [k];	813	ANHE he = heap [k];
632		814
633	while (k && heap [k >> 1]->at > w->at)	815	for (;;)
634	{	816	{
		817	int p = HPARENT (k);
		818
		819	if (p == k \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		820	break;
		821
635	heap [k] = heap [k >> 1];	822	heap [k] = heap [p];
636	((W)heap [k])->active = k + 1;	823	ev_active (ANHE_w (heap [k])) = k;
637	k >>= 1;	824	k = p;
638	}	825	}
639		826
640	heap [k] = w;	827	heap [k] = he;
641	((W)heap [k])->active = k + 1;	828	ev_active (ANHE_w (he)) = k;
642
643	}	829	}
644		830
		831	/* away from the root */
645	void inline_speed	832	void inline_speed
646	downheap (WT *heap, int N, int k)	833	downheap (ANHE *heap, int N, int k)
647	{	834	{
648	WT w = heap [k];	835	ANHE he = heap [k];
		836	ANHE *E = heap + N + HEAP0;
649		837
650	while (k < (N >> 1))	838	for (;;)
651	{	839	{
652	int j = k << 1;	840	ev_tstamp minat;
		841	ANHE *minpos;
		842	ANHE pos = heap + DHEAP (k - HEAP0) + HEAP0;
653		843
654	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	844	// find minimum child
		845	if (expect_true (pos + DHEAP - 1 < E))
655	++j;	846	{
656		847	/* fast path / (minpos = pos + 0), (minat = ANHE_at (minpos));
657	if (w->at <= heap [j]->at)	848	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		849	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		850	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		851	}
		852	else if (pos < E)
		853	{
		854	/* slow path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		855	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		856	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		857	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		858	}
		859	else
658	break;	860	break;
659		861
		862	if (ANHE_at (he) <= minat)
		863	break;
		864
		865	heap [k] = *minpos;
		866	ev_active (ANHE_w (*minpos)) = k;
		867
		868	k = minpos - heap;
		869	}
		870
		871	heap [k] = he;
		872	ev_active (ANHE_w (he)) = k;
		873	}
		874
		875	#else // 4HEAP
		876
		877	#define HEAP0 1
		878	#define HPARENT(k) ((k) >> 1)
		879
		880	/* towards the root */
		881	void inline_speed
		882	upheap (ANHE *heap, int k)
		883	{
		884	ANHE he = heap [k];
		885
		886	for (;;)
		887	{
		888	int p = HPARENT (k);
		889
		890	/* maybe we could use a dummy element at heap [0]? */
		891	if (!p \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		892	break;
		893
660	heap [k] = heap [j];	894	heap [k] = heap [p];
661	((W)heap [k])->active = k + 1;	895	ev_active (ANHE_w (heap [k])) = k;
662	k = j;	896	k = p;
663	}	897	}
664		898
665	heap [k] = w;	899	heap [k] = he;
666	((W)heap [k])->active = k + 1;	900	ev_active (ANHE_w (heap [k])) = k;
667	}	901	}
		902
		903	/* away from the root */
		904	void inline_speed
		905	downheap (ANHE *heap, int N, int k)
		906	{
		907	ANHE he = heap [k];
		908
		909	for (;;)
		910	{
		911	int c = k << 1;
		912
		913	if (c > N)
		914	break;
		915
		916	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		917	? 1 : 0;
		918
		919	if (ANHE_at (he) <= ANHE_at (heap [c]))
		920	break;
		921
		922	heap [k] = heap [c];
		923	ev_active (ANHE_w (heap [k])) = k;
		924
		925	k = c;
		926	}
		927
		928	heap [k] = he;
		929	ev_active (ANHE_w (he)) = k;
		930	}
		931	#endif
668		932
669	void inline_size	933	void inline_size
670	adjustheap (WT *heap, int N, int k)	934	adjustheap (ANHE *heap, int N, int k)
671	{	935	{
		936	if (k > HEAP0 && ANHE_at (heap [HPARENT (k)]) >= ANHE_at (heap [k]))
672	upheap (heap, k);	937	upheap (heap, k);
		938	else
673	downheap (heap, N, k);	939	downheap (heap, N, k);
674	}	940	}
675		941
676	/*****************************************************************************/	942	/*****************************************************************************/
677		943
678	typedef struct	944	typedef struct
679	{	945	{
680	WL head;	946	WL head;
681	sig_atomic_t volatile gotsig;	947	EV_ATOMIC_T gotsig;
682	} ANSIG;	948	} ANSIG;
683		949
684	static ANSIG *signals;	950	static ANSIG *signals;
685	static int signalmax;	951	static int signalmax;
686		952
687	static int sigpipe [2];	953	static EV_ATOMIC_T gotsig;
688	static sig_atomic_t volatile gotsig;
689	static ev_io sigev;
690		954
691	void inline_size	955	void inline_size
692	signals_init (ANSIG *base, int count)	956	signals_init (ANSIG *base, int count)
693	{	957	{
694	while (count--)	958	while (count--)
…		…
698		962
699	++base;	963	++base;
700	}	964	}
701	}	965	}
702		966
703	static void	967	/*****************************************************************************/
704	sighandler (int signum)
705	{
706	#if _WIN32
707	signal (signum, sighandler);
708	#endif
709
710	signals [signum - 1].gotsig = 1;
711
712	if (!gotsig)
713	{
714	int old_errno = errno;
715	gotsig = 1;
716	write (sigpipe [1], &signum, 1);
717	errno = old_errno;
718	}
719	}
720
721	void noinline
722	ev_feed_signal_event (EV_P_ int signum)
723	{
724	WL w;
725
726	#if EV_MULTIPLICITY
727	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
728	#endif
729
730	--signum;
731
732	if (signum < 0 \|\| signum >= signalmax)
733	return;
734
735	signals [signum].gotsig = 0;
736
737	for (w = signals [signum].head; w; w = w->next)
738	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
739	}
740
741	static void
742	sigcb (EV_P_ ev_io *iow, int revents)
743	{
744	int signum;
745
746	read (sigpipe [0], &revents, 1);
747	gotsig = 0;
748
749	for (signum = signalmax; signum--; )
750	if (signals [signum].gotsig)
751	ev_feed_signal_event (EV_A_ signum + 1);
752	}
753		968
754	void inline_speed	969	void inline_speed
755	fd_intern (int fd)	970	fd_intern (int fd)
756	{	971	{
757	#ifdef _WIN32	972	#ifdef _WIN32
…		…
762	fcntl (fd, F_SETFL, O_NONBLOCK);	977	fcntl (fd, F_SETFL, O_NONBLOCK);
763	#endif	978	#endif
764	}	979	}
765		980
766	static void noinline	981	static void noinline
767	siginit (EV_P)	982	evpipe_init (EV_P)
768	{	983	{
		984	if (!ev_is_active (&pipeev))
		985	{
		986	#if EV_USE_EVENTFD
		987	if ((evfd = eventfd (0, 0)) >= 0)
		988	{
		989	evpipe [0] = -1;
		990	fd_intern (evfd);
		991	ev_io_set (&pipeev, evfd, EV_READ);
		992	}
		993	else
		994	#endif
		995	{
		996	while (pipe (evpipe))
		997	syserr ("(libev) error creating signal/async pipe");
		998
769	fd_intern (sigpipe [0]);	999	fd_intern (evpipe [0]);
770	fd_intern (sigpipe [1]);	1000	fd_intern (evpipe [1]);
		1001	ev_io_set (&pipeev, evpipe [0], EV_READ);
		1002	}
771		1003
772	ev_io_set (&sigev, sigpipe [0], EV_READ);
773	ev_io_start (EV_A_ &sigev);	1004	ev_io_start (EV_A_ &pipeev);
774	ev_unref (EV_A); /* child watcher should not keep loop alive */	1005	ev_unref (EV_A); /* watcher should not keep loop alive */
		1006	}
		1007	}
		1008
		1009	void inline_size
		1010	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1011	{
		1012	if (!*flag)
		1013	{
		1014	int old_errno = errno; /* save errno because write might clobber it */
		1015
		1016	*flag = 1;
		1017
		1018	#if EV_USE_EVENTFD
		1019	if (evfd >= 0)
		1020	{
		1021	uint64_t counter = 1;
		1022	write (evfd, &counter, sizeof (uint64_t));
		1023	}
		1024	else
		1025	#endif
		1026	write (evpipe [1], &old_errno, 1);
		1027
		1028	errno = old_errno;
		1029	}
		1030	}
		1031
		1032	static void
		1033	pipecb (EV_P_ ev_io *iow, int revents)
		1034	{
		1035	#if EV_USE_EVENTFD
		1036	if (evfd >= 0)
		1037	{
		1038	uint64_t counter;
		1039	read (evfd, &counter, sizeof (uint64_t));
		1040	}
		1041	else
		1042	#endif
		1043	{
		1044	char dummy;
		1045	read (evpipe [0], &dummy, 1);
		1046	}
		1047
		1048	if (gotsig && ev_is_default_loop (EV_A))
		1049	{
		1050	int signum;
		1051	gotsig = 0;
		1052
		1053	for (signum = signalmax; signum--; )
		1054	if (signals [signum].gotsig)
		1055	ev_feed_signal_event (EV_A_ signum + 1);
		1056	}
		1057
		1058	#if EV_ASYNC_ENABLE
		1059	if (gotasync)
		1060	{
		1061	int i;
		1062	gotasync = 0;
		1063
		1064	for (i = asynccnt; i--; )
		1065	if (asyncs [i]->sent)
		1066	{
		1067	asyncs [i]->sent = 0;
		1068	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1069	}
		1070	}
		1071	#endif
775	}	1072	}
776		1073
777	/*****************************************************************************/	1074	/*****************************************************************************/
778		1075
		1076	static void
		1077	ev_sighandler (int signum)
		1078	{
		1079	#if EV_MULTIPLICITY
		1080	struct ev_loop *loop = &default_loop_struct;
		1081	#endif
		1082
		1083	#if _WIN32
		1084	signal (signum, ev_sighandler);
		1085	#endif
		1086
		1087	signals [signum - 1].gotsig = 1;
		1088	evpipe_write (EV_A_ &gotsig);
		1089	}
		1090
		1091	void noinline
		1092	ev_feed_signal_event (EV_P_ int signum)
		1093	{
		1094	WL w;
		1095
		1096	#if EV_MULTIPLICITY
		1097	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1098	#endif
		1099
		1100	--signum;
		1101
		1102	if (signum < 0 \|\| signum >= signalmax)
		1103	return;
		1104
		1105	signals [signum].gotsig = 0;
		1106
		1107	for (w = signals [signum].head; w; w = w->next)
		1108	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1109	}
		1110
		1111	/*****************************************************************************/
		1112
779	static ev_child *childs [EV_PID_HASHSIZE];	1113	static WL childs [EV_PID_HASHSIZE];
780		1114
781	#ifndef _WIN32	1115	#ifndef _WIN32
782		1116
783	static ev_signal childev;	1117	static ev_signal childev;
784		1118
		1119	#ifndef WIFCONTINUED
		1120	# define WIFCONTINUED(status) 0
		1121	#endif
		1122
785	void inline_speed	1123	void inline_speed
786	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1124	child_reap (EV_P_ int chain, int pid, int status)
787	{	1125	{
788	ev_child *w;	1126	ev_child *w;
		1127	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
789		1128
790	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1129	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1130	{
791	if (w->pid == pid \|\| !w->pid)	1131	if ((w->pid == pid \|\| !w->pid)
		1132	&& (!traced \|\| (w->flags & 1)))
792	{	1133	{
793	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	1134	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
794	w->rpid = pid;	1135	w->rpid = pid;
795	w->rstatus = status;	1136	w->rstatus = status;
796	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1137	ev_feed_event (EV_A_ (W)w, EV_CHILD);
797	}	1138	}
		1139	}
798	}	1140	}
799		1141
800	#ifndef WCONTINUED	1142	#ifndef WCONTINUED
801	# define WCONTINUED 0	1143	# define WCONTINUED 0
802	#endif	1144	#endif
…		…
811	if (!WCONTINUED	1153	if (!WCONTINUED
812	\|\| errno != EINVAL	1154	\|\| errno != EINVAL
813	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))	1155	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
814	return;	1156	return;
815		1157
816	/* make sure we are called again until all childs have been reaped */	1158	/* make sure we are called again until all children have been reaped */
817	/* we need to do it this way so that the callback gets called before we continue */	1159	/* we need to do it this way so that the callback gets called before we continue */
818	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1160	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
819		1161
820	child_reap (EV_A_ sw, pid, pid, status);	1162	child_reap (EV_A_ pid, pid, status);
821	if (EV_PID_HASHSIZE > 1)	1163	if (EV_PID_HASHSIZE > 1)
822	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1164	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
823	}	1165	}
824		1166
825	#endif	1167	#endif
826		1168
827	/*****************************************************************************/	1169	/*****************************************************************************/
…		…
899	}	1241	}
900		1242
901	unsigned int	1243	unsigned int
902	ev_embeddable_backends (void)	1244	ev_embeddable_backends (void)
903	{	1245	{
904	return EVBACKEND_EPOLL	1246	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
905	\| EVBACKEND_KQUEUE	1247
906	\| EVBACKEND_PORT;	1248	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1249	/* please fix it and tell me how to detect the fix */
		1250	flags &= ~EVBACKEND_EPOLL;
		1251
		1252	return flags;
907	}	1253	}
908		1254
909	unsigned int	1255	unsigned int
910	ev_backend (EV_P)	1256	ev_backend (EV_P)
911	{	1257	{
…		…
914		1260
915	unsigned int	1261	unsigned int
916	ev_loop_count (EV_P)	1262	ev_loop_count (EV_P)
917	{	1263	{
918	return loop_count;	1264	return loop_count;
		1265	}
		1266
		1267	void
		1268	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1269	{
		1270	io_blocktime = interval;
		1271	}
		1272
		1273	void
		1274	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1275	{
		1276	timeout_blocktime = interval;
919	}	1277	}
920		1278
921	static void noinline	1279	static void noinline
922	loop_init (EV_P_ unsigned int flags)	1280	loop_init (EV_P_ unsigned int flags)
923	{	1281	{
…		…
929	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1287	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
930	have_monotonic = 1;	1288	have_monotonic = 1;
931	}	1289	}
932	#endif	1290	#endif
933		1291
934	ev_rt_now = ev_time ();	1292	ev_rt_now = ev_time ();
935	mn_now = get_clock ();	1293	mn_now = get_clock ();
936	now_floor = mn_now;	1294	now_floor = mn_now;
937	rtmn_diff = ev_rt_now - mn_now;	1295	rtmn_diff = ev_rt_now - mn_now;
		1296
		1297	io_blocktime = 0.;
		1298	timeout_blocktime = 0.;
		1299	backend = 0;
		1300	backend_fd = -1;
		1301	gotasync = 0;
		1302	#if EV_USE_INOTIFY
		1303	fs_fd = -2;
		1304	#endif
938		1305
939	/* pid check not overridable via env */	1306	/* pid check not overridable via env */
940	#ifndef _WIN32	1307	#ifndef _WIN32
941	if (flags & EVFLAG_FORKCHECK)	1308	if (flags & EVFLAG_FORKCHECK)
942	curpid = getpid ();	1309	curpid = getpid ();
…		…
945	if (!(flags & EVFLAG_NOENV)	1312	if (!(flags & EVFLAG_NOENV)
946	&& !enable_secure ()	1313	&& !enable_secure ()
947	&& getenv ("LIBEV_FLAGS"))	1314	&& getenv ("LIBEV_FLAGS"))
948	flags = atoi (getenv ("LIBEV_FLAGS"));	1315	flags = atoi (getenv ("LIBEV_FLAGS"));
949		1316
950	if (!(flags & 0x0000ffffUL))	1317	if (!(flags & 0x0000ffffU))
951	flags \|= ev_recommended_backends ();	1318	flags \|= ev_recommended_backends ();
952
953	backend = 0;
954	backend_fd = -1;
955	#if EV_USE_INOTIFY
956	fs_fd = -2;
957	#endif
958		1319
959	#if EV_USE_PORT	1320	#if EV_USE_PORT
960	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1321	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
961	#endif	1322	#endif
962	#if EV_USE_KQUEUE	1323	#if EV_USE_KQUEUE
…		…
970	#endif	1331	#endif
971	#if EV_USE_SELECT	1332	#if EV_USE_SELECT
972	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1333	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
973	#endif	1334	#endif
974		1335
975	ev_init (&sigev, sigcb);	1336	ev_init (&pipeev, pipecb);
976	ev_set_priority (&sigev, EV_MAXPRI);	1337	ev_set_priority (&pipeev, EV_MAXPRI);
977	}	1338	}
978	}	1339	}
979		1340
980	static void noinline	1341	static void noinline
981	loop_destroy (EV_P)	1342	loop_destroy (EV_P)
982	{	1343	{
983	int i;	1344	int i;
		1345
		1346	if (ev_is_active (&pipeev))
		1347	{
		1348	ev_ref (EV_A); /* signal watcher */
		1349	ev_io_stop (EV_A_ &pipeev);
		1350
		1351	#if EV_USE_EVENTFD
		1352	if (evfd >= 0)
		1353	close (evfd);
		1354	#endif
		1355
		1356	if (evpipe [0] >= 0)
		1357	{
		1358	close (evpipe [0]);
		1359	close (evpipe [1]);
		1360	}
		1361	}
984		1362
985	#if EV_USE_INOTIFY	1363	#if EV_USE_INOTIFY
986	if (fs_fd >= 0)	1364	if (fs_fd >= 0)
987	close (fs_fd);	1365	close (fs_fd);
988	#endif	1366	#endif
…		…
1011	array_free (pending, [i]);	1389	array_free (pending, [i]);
1012	#if EV_IDLE_ENABLE	1390	#if EV_IDLE_ENABLE
1013	array_free (idle, [i]);	1391	array_free (idle, [i]);
1014	#endif	1392	#endif
1015	}	1393	}
		1394
		1395	ev_free (anfds); anfdmax = 0;
1016		1396
1017	/* have to use the microsoft-never-gets-it-right macro */	1397	/* have to use the microsoft-never-gets-it-right macro */
1018	array_free (fdchange, EMPTY);	1398	array_free (fdchange, EMPTY);
1019	array_free (timer, EMPTY);	1399	array_free (timer, EMPTY);
1020	#if EV_PERIODIC_ENABLE	1400	#if EV_PERIODIC_ENABLE
1021	array_free (periodic, EMPTY);	1401	array_free (periodic, EMPTY);
1022	#endif	1402	#endif
		1403	#if EV_FORK_ENABLE
		1404	array_free (fork, EMPTY);
		1405	#endif
1023	array_free (prepare, EMPTY);	1406	array_free (prepare, EMPTY);
1024	array_free (check, EMPTY);	1407	array_free (check, EMPTY);
		1408	#if EV_ASYNC_ENABLE
		1409	array_free (async, EMPTY);
		1410	#endif
1025		1411
1026	backend = 0;	1412	backend = 0;
1027	}	1413	}
1028		1414
		1415	#if EV_USE_INOTIFY
1029	void inline_size infy_fork (EV_P);	1416	void inline_size infy_fork (EV_P);
		1417	#endif
1030		1418
1031	void inline_size	1419	void inline_size
1032	loop_fork (EV_P)	1420	loop_fork (EV_P)
1033	{	1421	{
1034	#if EV_USE_PORT	1422	#if EV_USE_PORT
…		…
1042	#endif	1430	#endif
1043	#if EV_USE_INOTIFY	1431	#if EV_USE_INOTIFY
1044	infy_fork (EV_A);	1432	infy_fork (EV_A);
1045	#endif	1433	#endif
1046		1434
1047	if (ev_is_active (&sigev))	1435	if (ev_is_active (&pipeev))
1048	{	1436	{
1049	/* default loop */	1437	/* this "locks" the handlers against writing to the pipe */
		1438	/* while we modify the fd vars */
		1439	gotsig = 1;
		1440	#if EV_ASYNC_ENABLE
		1441	gotasync = 1;
		1442	#endif
1050		1443
1051	ev_ref (EV_A);	1444	ev_ref (EV_A);
1052	ev_io_stop (EV_A_ &sigev);	1445	ev_io_stop (EV_A_ &pipeev);
		1446
		1447	#if EV_USE_EVENTFD
		1448	if (evfd >= 0)
		1449	close (evfd);
		1450	#endif
		1451
		1452	if (evpipe [0] >= 0)
		1453	{
1053	close (sigpipe [0]);	1454	close (evpipe [0]);
1054	close (sigpipe [1]);	1455	close (evpipe [1]);
		1456	}
1055		1457
1056	while (pipe (sigpipe))
1057	syserr ("(libev) error creating pipe");
1058
1059	siginit (EV_A);	1458	evpipe_init (EV_A);
		1459	/* now iterate over everything, in case we missed something */
		1460	pipecb (EV_A_ &pipeev, EV_READ);
1060	}	1461	}
1061		1462
1062	postfork = 0;	1463	postfork = 0;
1063	}	1464	}
1064		1465
…		…
1086	}	1487	}
1087		1488
1088	void	1489	void
1089	ev_loop_fork (EV_P)	1490	ev_loop_fork (EV_P)
1090	{	1491	{
1091	postfork = 1;	1492	postfork = 1; /* must be in line with ev_default_fork */
1092	}	1493	}
1093
1094	#endif	1494	#endif
1095		1495
1096	#if EV_MULTIPLICITY	1496	#if EV_MULTIPLICITY
1097	struct ev_loop *	1497	struct ev_loop *
1098	ev_default_loop_init (unsigned int flags)	1498	ev_default_loop_init (unsigned int flags)
1099	#else	1499	#else
1100	int	1500	int
1101	ev_default_loop (unsigned int flags)	1501	ev_default_loop (unsigned int flags)
1102	#endif	1502	#endif
1103	{	1503	{
1104	if (sigpipe [0] == sigpipe [1])
1105	if (pipe (sigpipe))
1106	return 0;
1107
1108	if (!ev_default_loop_ptr)	1504	if (!ev_default_loop_ptr)
1109	{	1505	{
1110	#if EV_MULTIPLICITY	1506	#if EV_MULTIPLICITY
1111	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1507	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1112	#else	1508	#else
…		…
1115		1511
1116	loop_init (EV_A_ flags);	1512	loop_init (EV_A_ flags);
1117		1513
1118	if (ev_backend (EV_A))	1514	if (ev_backend (EV_A))
1119	{	1515	{
1120	siginit (EV_A);
1121
1122	#ifndef _WIN32	1516	#ifndef _WIN32
1123	ev_signal_init (&childev, childcb, SIGCHLD);	1517	ev_signal_init (&childev, childcb, SIGCHLD);
1124	ev_set_priority (&childev, EV_MAXPRI);	1518	ev_set_priority (&childev, EV_MAXPRI);
1125	ev_signal_start (EV_A_ &childev);	1519	ev_signal_start (EV_A_ &childev);
1126	ev_unref (EV_A); /* child watcher should not keep loop alive */	1520	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1143	#ifndef _WIN32	1537	#ifndef _WIN32
1144	ev_ref (EV_A); /* child watcher */	1538	ev_ref (EV_A); /* child watcher */
1145	ev_signal_stop (EV_A_ &childev);	1539	ev_signal_stop (EV_A_ &childev);
1146	#endif	1540	#endif
1147		1541
1148	ev_ref (EV_A); /* signal watcher */
1149	ev_io_stop (EV_A_ &sigev);
1150
1151	close (sigpipe [0]); sigpipe [0] = 0;
1152	close (sigpipe [1]); sigpipe [1] = 0;
1153
1154	loop_destroy (EV_A);	1542	loop_destroy (EV_A);
1155	}	1543	}
1156		1544
1157	void	1545	void
1158	ev_default_fork (void)	1546	ev_default_fork (void)
…		…
1160	#if EV_MULTIPLICITY	1548	#if EV_MULTIPLICITY
1161	struct ev_loop *loop = ev_default_loop_ptr;	1549	struct ev_loop *loop = ev_default_loop_ptr;
1162	#endif	1550	#endif
1163		1551
1164	if (backend)	1552	if (backend)
1165	postfork = 1;	1553	postfork = 1; /* must be in line with ev_loop_fork */
1166	}	1554	}
1167		1555
1168	/*****************************************************************************/	1556	/*****************************************************************************/
1169		1557
1170	void	1558	void
…		…
1190	p->w->pending = 0;	1578	p->w->pending = 0;
1191	EV_CB_INVOKE (p->w, p->events);	1579	EV_CB_INVOKE (p->w, p->events);
1192	}	1580	}
1193	}	1581	}
1194	}	1582	}
1195
1196	void inline_size
1197	timers_reify (EV_P)
1198	{
1199	while (timercnt && ((WT)timers [0])->at <= mn_now)
1200	{
1201	ev_timer *w = timers [0];
1202
1203	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
1204
1205	/* first reschedule or stop timer */
1206	if (w->repeat)
1207	{
1208	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1209
1210	((WT)w)->at += w->repeat;
1211	if (((WT)w)->at < mn_now)
1212	((WT)w)->at = mn_now;
1213
1214	downheap ((WT *)timers, timercnt, 0);
1215	}
1216	else
1217	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1218
1219	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1220	}
1221	}
1222
1223	#if EV_PERIODIC_ENABLE
1224	void inline_size
1225	periodics_reify (EV_P)
1226	{
1227	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1228	{
1229	ev_periodic *w = periodics [0];
1230
1231	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
1232
1233	/* first reschedule or stop timer */
1234	if (w->reschedule_cb)
1235	{
1236	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + 0.0001);
1237	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1238	downheap ((WT *)periodics, periodiccnt, 0);
1239	}
1240	else if (w->interval)
1241	{
1242	((WT)w)->at = w->offset + floor ((ev_rt_now - w->offset) / w->interval + 1.) * w->interval;
1243	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1244	downheap ((WT *)periodics, periodiccnt, 0);
1245	}
1246	else
1247	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1248
1249	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1250	}
1251	}
1252
1253	static void noinline
1254	periodics_reschedule (EV_P)
1255	{
1256	int i;
1257
1258	/* adjust periodics after time jump */
1259	for (i = 0; i < periodiccnt; ++i)
1260	{
1261	ev_periodic *w = periodics [i];
1262
1263	if (w->reschedule_cb)
1264	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1265	else if (w->interval)
1266	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1267	}
1268
1269	/* now rebuild the heap */
1270	for (i = periodiccnt >> 1; i--; )
1271	downheap ((WT *)periodics, periodiccnt, i);
1272	}
1273	#endif
1274		1583
1275	#if EV_IDLE_ENABLE	1584	#if EV_IDLE_ENABLE
1276	void inline_size	1585	void inline_size
1277	idle_reify (EV_P)	1586	idle_reify (EV_P)
1278	{	1587	{
…		…
1293	}	1602	}
1294	}	1603	}
1295	}	1604	}
1296	#endif	1605	#endif
1297		1606
1298	int inline_size	1607	void inline_size
1299	time_update_monotonic (EV_P)	1608	timers_reify (EV_P)
1300	{	1609	{
		1610	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		1611	{
		1612	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
		1613
		1614	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
		1615
		1616	/* first reschedule or stop timer */
		1617	if (w->repeat)
		1618	{
		1619	ev_at (w) += w->repeat;
		1620	if (ev_at (w) < mn_now)
		1621	ev_at (w) = mn_now;
		1622
		1623	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1624
		1625	ANHE_at_set (timers [HEAP0]);
		1626	downheap (timers, timercnt, HEAP0);
		1627	}
		1628	else
		1629	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1630
		1631	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1632	}
		1633	}
		1634
		1635	#if EV_PERIODIC_ENABLE
		1636	void inline_size
		1637	periodics_reify (EV_P)
		1638	{
		1639	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
		1640	{
		1641	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		1642
		1643	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
		1644
		1645	/* first reschedule or stop timer */
		1646	if (w->reschedule_cb)
		1647	{
		1648	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1649
		1650	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1651
		1652	ANHE_at_set (periodics [HEAP0]);
		1653	downheap (periodics, periodiccnt, HEAP0);
		1654	}
		1655	else if (w->interval)
		1656	{
		1657	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1658	/* if next trigger time is not sufficiently in the future, put it there */
		1659	/* this might happen because of floating point inexactness */
		1660	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1661	{
		1662	ev_at (w) += w->interval;
		1663
		1664	/* if interval is unreasonably low we might still have a time in the past */
		1665	/* so correct this. this will make the periodic very inexact, but the user */
		1666	/* has effectively asked to get triggered more often than possible */
		1667	if (ev_at (w) < ev_rt_now)
		1668	ev_at (w) = ev_rt_now;
		1669	}
		1670
		1671	ANHE_at_set (periodics [HEAP0]);
		1672	downheap (periodics, periodiccnt, HEAP0);
		1673	}
		1674	else
		1675	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1676
		1677	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1678	}
		1679	}
		1680
		1681	static void noinline
		1682	periodics_reschedule (EV_P)
		1683	{
		1684	int i;
		1685
		1686	/* adjust periodics after time jump */
		1687	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1688	{
		1689	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
		1690
		1691	if (w->reschedule_cb)
		1692	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1693	else if (w->interval)
		1694	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1695
		1696	ANHE_at_set (periodics [i]);
		1697	}
		1698
		1699	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1700	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
		1701	for (i = 0; i < periodiccnt; ++i)
		1702	upheap (periodics, i + HEAP0);
		1703	}
		1704	#endif
		1705
		1706	void inline_speed
		1707	time_update (EV_P_ ev_tstamp max_block)
		1708	{
		1709	int i;
		1710
		1711	#if EV_USE_MONOTONIC
		1712	if (expect_true (have_monotonic))
		1713	{
		1714	ev_tstamp odiff = rtmn_diff;
		1715
1301	mn_now = get_clock ();	1716	mn_now = get_clock ();
1302		1717
		1718	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1719	/* interpolate in the meantime */
1303	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1720	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1304	{	1721	{
1305	ev_rt_now = rtmn_diff + mn_now;	1722	ev_rt_now = rtmn_diff + mn_now;
1306	return 0;	1723	return;
1307	}	1724	}
1308	else	1725
1309	{
1310	now_floor = mn_now;	1726	now_floor = mn_now;
1311	ev_rt_now = ev_time ();	1727	ev_rt_now = ev_time ();
1312	return 1;
1313	}
1314	}
1315		1728
1316	void inline_size	1729	/* loop a few times, before making important decisions.
1317	time_update (EV_P)	1730	* on the choice of "4": one iteration isn't enough,
1318	{	1731	* in case we get preempted during the calls to
1319	int i;	1732	* ev_time and get_clock. a second call is almost guaranteed
1320		1733	* to succeed in that case, though. and looping a few more times
1321	#if EV_USE_MONOTONIC	1734	* doesn't hurt either as we only do this on time-jumps or
1322	if (expect_true (have_monotonic))	1735	* in the unlikely event of having been preempted here.
1323	{	1736	*/
1324	if (time_update_monotonic (EV_A))	1737	for (i = 4; --i; )
1325	{	1738	{
1326	ev_tstamp odiff = rtmn_diff;
1327
1328	/* loop a few times, before making important decisions.
1329	* on the choice of "4": one iteration isn't enough,
1330	* in case we get preempted during the calls to
1331	* ev_time and get_clock. a second call is almost guaranteed
1332	* to succeed in that case, though. and looping a few more times
1333	* doesn't hurt either as we only do this on time-jumps or
1334	* in the unlikely event of having been preempted here.
1335	*/
1336	for (i = 4; --i; )
1337	{
1338	rtmn_diff = ev_rt_now - mn_now;	1739	rtmn_diff = ev_rt_now - mn_now;
1339		1740
1340	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1741	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1341	return; /* all is well */	1742	return; /* all is well */
1342		1743
1343	ev_rt_now = ev_time ();	1744	ev_rt_now = ev_time ();
1344	mn_now = get_clock ();	1745	mn_now = get_clock ();
1345	now_floor = mn_now;	1746	now_floor = mn_now;
1346	}	1747	}
1347		1748
1348	# if EV_PERIODIC_ENABLE	1749	# if EV_PERIODIC_ENABLE
1349	periodics_reschedule (EV_A);	1750	periodics_reschedule (EV_A);
1350	# endif	1751	# endif
1351	/* no timer adjustment, as the monotonic clock doesn't jump */	1752	/* no timer adjustment, as the monotonic clock doesn't jump */
1352	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1753	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1353	}
1354	}	1754	}
1355	else	1755	else
1356	#endif	1756	#endif
1357	{	1757	{
1358	ev_rt_now = ev_time ();	1758	ev_rt_now = ev_time ();
1359		1759
1360	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1760	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1361	{	1761	{
1362	#if EV_PERIODIC_ENABLE	1762	#if EV_PERIODIC_ENABLE
1363	periodics_reschedule (EV_A);	1763	periodics_reschedule (EV_A);
1364	#endif	1764	#endif
1365
1366	/* adjust timers. this is easy, as the offset is the same for all of them */	1765	/* adjust timers. this is easy, as the offset is the same for all of them */
1367	for (i = 0; i < timercnt; ++i)	1766	for (i = 0; i < timercnt; ++i)
		1767	{
		1768	ANHE *he = timers + i + HEAP0;
1368	((WT)timers [i])->at += ev_rt_now - mn_now;	1769	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1770	ANHE_at_set (*he);
		1771	}
1369	}	1772	}
1370		1773
1371	mn_now = ev_rt_now;	1774	mn_now = ev_rt_now;
1372	}	1775	}
1373	}	1776	}
…		…
1387	static int loop_done;	1790	static int loop_done;
1388		1791
1389	void	1792	void
1390	ev_loop (EV_P_ int flags)	1793	ev_loop (EV_P_ int flags)
1391	{	1794	{
1392	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1795	loop_done = EVUNLOOP_CANCEL;
1393	? EVUNLOOP_ONE
1394	: EVUNLOOP_CANCEL;
1395		1796
1396	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1797	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1397		1798
1398	do	1799	do
1399	{	1800	{
…		…
1433	/* update fd-related kernel structures */	1834	/* update fd-related kernel structures */
1434	fd_reify (EV_A);	1835	fd_reify (EV_A);
1435		1836
1436	/* calculate blocking time */	1837	/* calculate blocking time */
1437	{	1838	{
1438	ev_tstamp block;	1839	ev_tstamp waittime = 0.;
		1840	ev_tstamp sleeptime = 0.;
1439		1841
1440	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1842	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1441	block = 0.; /* do not block at all */
1442	else
1443	{	1843	{
1444	/* update time to cancel out callback processing overhead */	1844	/* update time to cancel out callback processing overhead */
1445	#if EV_USE_MONOTONIC
1446	if (expect_true (have_monotonic))
1447	time_update_monotonic (EV_A);	1845	time_update (EV_A_ 1e100);
1448	else
1449	#endif
1450	{
1451	ev_rt_now = ev_time ();
1452	mn_now = ev_rt_now;
1453	}
1454		1846
1455	block = MAX_BLOCKTIME;	1847	waittime = MAX_BLOCKTIME;
1456		1848
1457	if (timercnt)	1849	if (timercnt)
1458	{	1850	{
1459	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1851	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1460	if (block > to) block = to;	1852	if (waittime > to) waittime = to;
1461	}	1853	}
1462		1854
1463	#if EV_PERIODIC_ENABLE	1855	#if EV_PERIODIC_ENABLE
1464	if (periodiccnt)	1856	if (periodiccnt)
1465	{	1857	{
1466	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1858	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1467	if (block > to) block = to;	1859	if (waittime > to) waittime = to;
1468	}	1860	}
1469	#endif	1861	#endif
1470		1862
1471	if (expect_false (block < 0.)) block = 0.;	1863	if (expect_false (waittime < timeout_blocktime))
		1864	waittime = timeout_blocktime;
		1865
		1866	sleeptime = waittime - backend_fudge;
		1867
		1868	if (expect_true (sleeptime > io_blocktime))
		1869	sleeptime = io_blocktime;
		1870
		1871	if (sleeptime)
		1872	{
		1873	ev_sleep (sleeptime);
		1874	waittime -= sleeptime;
		1875	}
1472	}	1876	}
1473		1877
1474	++loop_count;	1878	++loop_count;
1475	backend_poll (EV_A_ block);	1879	backend_poll (EV_A_ waittime);
		1880
		1881	/* update ev_rt_now, do magic */
		1882	time_update (EV_A_ waittime + sleeptime);
1476	}	1883	}
1477
1478	/* update ev_rt_now, do magic */
1479	time_update (EV_A);
1480		1884
1481	/* queue pending timers and reschedule them */	1885	/* queue pending timers and reschedule them */
1482	timers_reify (EV_A); /* relative timers called last */	1886	timers_reify (EV_A); /* relative timers called last */
1483	#if EV_PERIODIC_ENABLE	1887	#if EV_PERIODIC_ENABLE
1484	periodics_reify (EV_A); /* absolute timers called first */	1888	periodics_reify (EV_A); /* absolute timers called first */
…		…
1492	/* queue check watchers, to be executed first */	1896	/* queue check watchers, to be executed first */
1493	if (expect_false (checkcnt))	1897	if (expect_false (checkcnt))
1494	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1898	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1495		1899
1496	call_pending (EV_A);	1900	call_pending (EV_A);
1497
1498	}	1901	}
1499	while (expect_true (activecnt && !loop_done));	1902	while (expect_true (
		1903	activecnt
		1904	&& !loop_done
		1905	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1906	));
1500		1907
1501	if (loop_done == EVUNLOOP_ONE)	1908	if (loop_done == EVUNLOOP_ONE)
1502	loop_done = EVUNLOOP_CANCEL;	1909	loop_done = EVUNLOOP_CANCEL;
1503	}	1910	}
1504		1911
…		…
1595		2002
1596	assert (("ev_io_start called with negative fd", fd >= 0));	2003	assert (("ev_io_start called with negative fd", fd >= 0));
1597		2004
1598	ev_start (EV_A_ (W)w, 1);	2005	ev_start (EV_A_ (W)w, 1);
1599	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2006	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1600	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2007	wlist_add (&anfds[fd].head, (WL)w);
1601		2008
1602	fd_change (EV_A_ fd);	2009	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		2010	w->events &= ~EV_IOFDSET;
1603	}	2011	}
1604		2012
1605	void noinline	2013	void noinline
1606	ev_io_stop (EV_P_ ev_io *w)	2014	ev_io_stop (EV_P_ ev_io *w)
1607	{	2015	{
1608	clear_pending (EV_A_ (W)w);	2016	clear_pending (EV_A_ (W)w);
1609	if (expect_false (!ev_is_active (w)))	2017	if (expect_false (!ev_is_active (w)))
1610	return;	2018	return;
1611		2019
1612	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2020	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1613		2021
1614	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2022	wlist_del (&anfds[w->fd].head, (WL)w);
1615	ev_stop (EV_A_ (W)w);	2023	ev_stop (EV_A_ (W)w);
1616		2024
1617	fd_change (EV_A_ w->fd);	2025	fd_change (EV_A_ w->fd, 1);
1618	}	2026	}
1619		2027
1620	void noinline	2028	void noinline
1621	ev_timer_start (EV_P_ ev_timer *w)	2029	ev_timer_start (EV_P_ ev_timer *w)
1622	{	2030	{
1623	if (expect_false (ev_is_active (w)))	2031	if (expect_false (ev_is_active (w)))
1624	return;	2032	return;
1625		2033
1626	((WT)w)->at += mn_now;	2034	ev_at (w) += mn_now;
1627		2035
1628	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2036	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1629		2037
1630	ev_start (EV_A_ (W)w, ++timercnt);	2038	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1631	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	2039	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1632	timers [timercnt - 1] = w;	2040	ANHE_w (timers [ev_active (w)]) = (WT)w;
1633	upheap ((WT *)timers, timercnt - 1);	2041	ANHE_at_set (timers [ev_active (w)]);
		2042	upheap (timers, ev_active (w));
1634		2043
1635	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/	2044	/assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
1636	}	2045	}
1637		2046
1638	void noinline	2047	void noinline
1639	ev_timer_stop (EV_P_ ev_timer *w)	2048	ev_timer_stop (EV_P_ ev_timer *w)
1640	{	2049	{
1641	clear_pending (EV_A_ (W)w);	2050	clear_pending (EV_A_ (W)w);
1642	if (expect_false (!ev_is_active (w)))	2051	if (expect_false (!ev_is_active (w)))
1643	return;	2052	return;
1644		2053
1645	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1646
1647	{	2054	{
1648	int active = ((W)w)->active;	2055	int active = ev_active (w);
1649		2056
		2057	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2058
1650	if (expect_true (--active < --timercnt))	2059	if (expect_true (active < timercnt + HEAP0 - 1))
1651	{	2060	{
1652	timers [active] = timers [timercnt];	2061	timers [active] = timers [timercnt + HEAP0 - 1];
1653	adjustheap ((WT *)timers, timercnt, active);	2062	adjustheap (timers, timercnt, active);
1654	}	2063	}
		2064
		2065	--timercnt;
1655	}	2066	}
1656		2067
1657	((WT)w)->at -= mn_now;	2068	ev_at (w) -= mn_now;
1658		2069
1659	ev_stop (EV_A_ (W)w);	2070	ev_stop (EV_A_ (W)w);
1660	}	2071	}
1661		2072
1662	void noinline	2073	void noinline
…		…
1664	{	2075	{
1665	if (ev_is_active (w))	2076	if (ev_is_active (w))
1666	{	2077	{
1667	if (w->repeat)	2078	if (w->repeat)
1668	{	2079	{
1669	((WT)w)->at = mn_now + w->repeat;	2080	ev_at (w) = mn_now + w->repeat;
		2081	ANHE_at_set (timers [ev_active (w)]);
1670	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2082	adjustheap (timers, timercnt, ev_active (w));
1671	}	2083	}
1672	else	2084	else
1673	ev_timer_stop (EV_A_ w);	2085	ev_timer_stop (EV_A_ w);
1674	}	2086	}
1675	else if (w->repeat)	2087	else if (w->repeat)
1676	{	2088	{
1677	w->at = w->repeat;	2089	ev_at (w) = w->repeat;
1678	ev_timer_start (EV_A_ w);	2090	ev_timer_start (EV_A_ w);
1679	}	2091	}
1680	}	2092	}
1681		2093
1682	#if EV_PERIODIC_ENABLE	2094	#if EV_PERIODIC_ENABLE
…		…
1685	{	2097	{
1686	if (expect_false (ev_is_active (w)))	2098	if (expect_false (ev_is_active (w)))
1687	return;	2099	return;
1688		2100
1689	if (w->reschedule_cb)	2101	if (w->reschedule_cb)
1690	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2102	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1691	else if (w->interval)	2103	else if (w->interval)
1692	{	2104	{
1693	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2105	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1694	/* this formula differs from the one in periodic_reify because we do not always round up */	2106	/* this formula differs from the one in periodic_reify because we do not always round up */
1695	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2107	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1696	}	2108	}
1697	else	2109	else
1698	((WT)w)->at = w->offset;	2110	ev_at (w) = w->offset;
1699		2111
1700	ev_start (EV_A_ (W)w, ++periodiccnt);	2112	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1701	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2113	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1702	periodics [periodiccnt - 1] = w;	2114	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1703	upheap ((WT *)periodics, periodiccnt - 1);	2115	ANHE_at_set (periodics [ev_active (w)]);
		2116	upheap (periodics, ev_active (w));
1704		2117
1705	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/	2118	/assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
1706	}	2119	}
1707		2120
1708	void noinline	2121	void noinline
1709	ev_periodic_stop (EV_P_ ev_periodic *w)	2122	ev_periodic_stop (EV_P_ ev_periodic *w)
1710	{	2123	{
1711	clear_pending (EV_A_ (W)w);	2124	clear_pending (EV_A_ (W)w);
1712	if (expect_false (!ev_is_active (w)))	2125	if (expect_false (!ev_is_active (w)))
1713	return;	2126	return;
1714		2127
1715	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1716
1717	{	2128	{
1718	int active = ((W)w)->active;	2129	int active = ev_active (w);
1719		2130
		2131	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2132
1720	if (expect_true (--active < --periodiccnt))	2133	if (expect_true (active < periodiccnt + HEAP0 - 1))
1721	{	2134	{
1722	periodics [active] = periodics [periodiccnt];	2135	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1723	adjustheap ((WT *)periodics, periodiccnt, active);	2136	adjustheap (periodics, periodiccnt, active);
1724	}	2137	}
		2138
		2139	--periodiccnt;
1725	}	2140	}
1726		2141
1727	ev_stop (EV_A_ (W)w);	2142	ev_stop (EV_A_ (W)w);
1728	}	2143	}
1729		2144
…		…
1749	if (expect_false (ev_is_active (w)))	2164	if (expect_false (ev_is_active (w)))
1750	return;	2165	return;
1751		2166
1752	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2167	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1753		2168
		2169	evpipe_init (EV_A);
		2170
		2171	{
		2172	#ifndef _WIN32
		2173	sigset_t full, prev;
		2174	sigfillset (&full);
		2175	sigprocmask (SIG_SETMASK, &full, &prev);
		2176	#endif
		2177
		2178	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2179
		2180	#ifndef _WIN32
		2181	sigprocmask (SIG_SETMASK, &prev, 0);
		2182	#endif
		2183	}
		2184
1754	ev_start (EV_A_ (W)w, 1);	2185	ev_start (EV_A_ (W)w, 1);
1755	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1756	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2186	wlist_add (&signals [w->signum - 1].head, (WL)w);
1757		2187
1758	if (!((WL)w)->next)	2188	if (!((WL)w)->next)
1759	{	2189	{
1760	#if _WIN32	2190	#if _WIN32
1761	signal (w->signum, sighandler);	2191	signal (w->signum, ev_sighandler);
1762	#else	2192	#else
1763	struct sigaction sa;	2193	struct sigaction sa;
1764	sa.sa_handler = sighandler;	2194	sa.sa_handler = ev_sighandler;
1765	sigfillset (&sa.sa_mask);	2195	sigfillset (&sa.sa_mask);
1766	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2196	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1767	sigaction (w->signum, &sa, 0);	2197	sigaction (w->signum, &sa, 0);
1768	#endif	2198	#endif
1769	}	2199	}
…		…
1774	{	2204	{
1775	clear_pending (EV_A_ (W)w);	2205	clear_pending (EV_A_ (W)w);
1776	if (expect_false (!ev_is_active (w)))	2206	if (expect_false (!ev_is_active (w)))
1777	return;	2207	return;
1778		2208
1779	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2209	wlist_del (&signals [w->signum - 1].head, (WL)w);
1780	ev_stop (EV_A_ (W)w);	2210	ev_stop (EV_A_ (W)w);
1781		2211
1782	if (!signals [w->signum - 1].head)	2212	if (!signals [w->signum - 1].head)
1783	signal (w->signum, SIG_DFL);	2213	signal (w->signum, SIG_DFL);
1784	}	2214	}
…		…
1791	#endif	2221	#endif
1792	if (expect_false (ev_is_active (w)))	2222	if (expect_false (ev_is_active (w)))
1793	return;	2223	return;
1794		2224
1795	ev_start (EV_A_ (W)w, 1);	2225	ev_start (EV_A_ (W)w, 1);
1796	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2226	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1797	}	2227	}
1798		2228
1799	void	2229	void
1800	ev_child_stop (EV_P_ ev_child *w)	2230	ev_child_stop (EV_P_ ev_child *w)
1801	{	2231	{
1802	clear_pending (EV_A_ (W)w);	2232	clear_pending (EV_A_ (W)w);
1803	if (expect_false (!ev_is_active (w)))	2233	if (expect_false (!ev_is_active (w)))
1804	return;	2234	return;
1805		2235
1806	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2236	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1807	ev_stop (EV_A_ (W)w);	2237	ev_stop (EV_A_ (W)w);
1808	}	2238	}
1809		2239
1810	#if EV_STAT_ENABLE	2240	#if EV_STAT_ENABLE
1811		2241
…		…
1830	if (w->wd < 0)	2260	if (w->wd < 0)
1831	{	2261	{
1832	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2262	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1833		2263
1834	/* monitor some parent directory for speedup hints */	2264	/* monitor some parent directory for speedup hints */
		2265	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2266	/* but an efficiency issue only */
1835	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2267	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
1836	{	2268	{
1837	char path [4096];	2269	char path [4096];
1838	strcpy (path, w->path);	2270	strcpy (path, w->path);
1839		2271
…		…
2084	clear_pending (EV_A_ (W)w);	2516	clear_pending (EV_A_ (W)w);
2085	if (expect_false (!ev_is_active (w)))	2517	if (expect_false (!ev_is_active (w)))
2086	return;	2518	return;
2087		2519
2088	{	2520	{
2089	int active = ((W)w)->active;	2521	int active = ev_active (w);
2090		2522
2091	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2523	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2092	((W)idles [ABSPRI (w)][active - 1])->active = active;	2524	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2093		2525
2094	ev_stop (EV_A_ (W)w);	2526	ev_stop (EV_A_ (W)w);
2095	--idleall;	2527	--idleall;
2096	}	2528	}
2097	}	2529	}
…		…
2114	clear_pending (EV_A_ (W)w);	2546	clear_pending (EV_A_ (W)w);
2115	if (expect_false (!ev_is_active (w)))	2547	if (expect_false (!ev_is_active (w)))
2116	return;	2548	return;
2117		2549
2118	{	2550	{
2119	int active = ((W)w)->active;	2551	int active = ev_active (w);
		2552
2120	prepares [active - 1] = prepares [--preparecnt];	2553	prepares [active - 1] = prepares [--preparecnt];
2121	((W)prepares [active - 1])->active = active;	2554	ev_active (prepares [active - 1]) = active;
2122	}	2555	}
2123		2556
2124	ev_stop (EV_A_ (W)w);	2557	ev_stop (EV_A_ (W)w);
2125	}	2558	}
2126		2559
…		…
2141	clear_pending (EV_A_ (W)w);	2574	clear_pending (EV_A_ (W)w);
2142	if (expect_false (!ev_is_active (w)))	2575	if (expect_false (!ev_is_active (w)))
2143	return;	2576	return;
2144		2577
2145	{	2578	{
2146	int active = ((W)w)->active;	2579	int active = ev_active (w);
		2580
2147	checks [active - 1] = checks [--checkcnt];	2581	checks [active - 1] = checks [--checkcnt];
2148	((W)checks [active - 1])->active = active;	2582	ev_active (checks [active - 1]) = active;
2149	}	2583	}
2150		2584
2151	ev_stop (EV_A_ (W)w);	2585	ev_stop (EV_A_ (W)w);
2152	}	2586	}
2153		2587
2154	#if EV_EMBED_ENABLE	2588	#if EV_EMBED_ENABLE
2155	void noinline	2589	void noinline
2156	ev_embed_sweep (EV_P_ ev_embed *w)	2590	ev_embed_sweep (EV_P_ ev_embed *w)
2157	{	2591	{
2158	ev_loop (w->loop, EVLOOP_NONBLOCK);	2592	ev_loop (w->other, EVLOOP_NONBLOCK);
2159	}	2593	}
2160		2594
2161	static void	2595	static void
2162	embed_cb (EV_P_ ev_io *io, int revents)	2596	embed_io_cb (EV_P_ ev_io *io, int revents)
2163	{	2597	{
2164	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2598	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2165		2599
2166	if (ev_cb (w))	2600	if (ev_cb (w))
2167	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2601	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2168	else	2602	else
2169	ev_embed_sweep (loop, w);	2603	ev_loop (w->other, EVLOOP_NONBLOCK);
2170	}	2604	}
		2605
		2606	static void
		2607	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2608	{
		2609	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2610
		2611	{
		2612	struct ev_loop *loop = w->other;
		2613
		2614	while (fdchangecnt)
		2615	{
		2616	fd_reify (EV_A);
		2617	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2618	}
		2619	}
		2620	}
		2621
		2622	#if 0
		2623	static void
		2624	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2625	{
		2626	ev_idle_stop (EV_A_ idle);
		2627	}
		2628	#endif
2171		2629
2172	void	2630	void
2173	ev_embed_start (EV_P_ ev_embed *w)	2631	ev_embed_start (EV_P_ ev_embed *w)
2174	{	2632	{
2175	if (expect_false (ev_is_active (w)))	2633	if (expect_false (ev_is_active (w)))
2176	return;	2634	return;
2177		2635
2178	{	2636	{
2179	struct ev_loop *loop = w->loop;	2637	struct ev_loop *loop = w->other;
2180	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2638	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2181	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2639	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2182	}	2640	}
2183		2641
2184	ev_set_priority (&w->io, ev_priority (w));	2642	ev_set_priority (&w->io, ev_priority (w));
2185	ev_io_start (EV_A_ &w->io);	2643	ev_io_start (EV_A_ &w->io);
		2644
		2645	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2646	ev_set_priority (&w->prepare, EV_MINPRI);
		2647	ev_prepare_start (EV_A_ &w->prepare);
		2648
		2649	/ev_idle_init (&w->idle, e,bed_idle_cb);/
2186		2650
2187	ev_start (EV_A_ (W)w, 1);	2651	ev_start (EV_A_ (W)w, 1);
2188	}	2652	}
2189		2653
2190	void	2654	void
…		…
2193	clear_pending (EV_A_ (W)w);	2657	clear_pending (EV_A_ (W)w);
2194	if (expect_false (!ev_is_active (w)))	2658	if (expect_false (!ev_is_active (w)))
2195	return;	2659	return;
2196		2660
2197	ev_io_stop (EV_A_ &w->io);	2661	ev_io_stop (EV_A_ &w->io);
		2662	ev_prepare_stop (EV_A_ &w->prepare);
2198		2663
2199	ev_stop (EV_A_ (W)w);	2664	ev_stop (EV_A_ (W)w);
2200	}	2665	}
2201	#endif	2666	#endif
2202		2667
…		…
2218	clear_pending (EV_A_ (W)w);	2683	clear_pending (EV_A_ (W)w);
2219	if (expect_false (!ev_is_active (w)))	2684	if (expect_false (!ev_is_active (w)))
2220	return;	2685	return;
2221		2686
2222	{	2687	{
2223	int active = ((W)w)->active;	2688	int active = ev_active (w);
		2689
2224	forks [active - 1] = forks [--forkcnt];	2690	forks [active - 1] = forks [--forkcnt];
2225	((W)forks [active - 1])->active = active;	2691	ev_active (forks [active - 1]) = active;
2226	}	2692	}
2227		2693
2228	ev_stop (EV_A_ (W)w);	2694	ev_stop (EV_A_ (W)w);
		2695	}
		2696	#endif
		2697
		2698	#if EV_ASYNC_ENABLE
		2699	void
		2700	ev_async_start (EV_P_ ev_async *w)
		2701	{
		2702	if (expect_false (ev_is_active (w)))
		2703	return;
		2704
		2705	evpipe_init (EV_A);
		2706
		2707	ev_start (EV_A_ (W)w, ++asynccnt);
		2708	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2709	asyncs [asynccnt - 1] = w;
		2710	}
		2711
		2712	void
		2713	ev_async_stop (EV_P_ ev_async *w)
		2714	{
		2715	clear_pending (EV_A_ (W)w);
		2716	if (expect_false (!ev_is_active (w)))
		2717	return;
		2718
		2719	{
		2720	int active = ev_active (w);
		2721
		2722	asyncs [active - 1] = asyncs [--asynccnt];
		2723	ev_active (asyncs [active - 1]) = active;
		2724	}
		2725
		2726	ev_stop (EV_A_ (W)w);
		2727	}
		2728
		2729	void
		2730	ev_async_send (EV_P_ ev_async *w)
		2731	{
		2732	w->sent = 1;
		2733	evpipe_write (EV_A_ &gotasync);
2229	}	2734	}
2230	#endif	2735	#endif
2231		2736
2232	/*****************************************************************************/	2737	/*****************************************************************************/
2233		2738
…		…
2291	ev_timer_set (&once->to, timeout, 0.);	2796	ev_timer_set (&once->to, timeout, 0.);
2292	ev_timer_start (EV_A_ &once->to);	2797	ev_timer_start (EV_A_ &once->to);
2293	}	2798	}
2294	}	2799	}
2295		2800
		2801	#if EV_MULTIPLICITY
		2802	#include "ev_wrap.h"
		2803	#endif
		2804
2296	#ifdef __cplusplus	2805	#ifdef __cplusplus
2297	}	2806	}
2298	#endif	2807	#endif
2299		2808

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Comparing libev/ev.c (file contents): Revision 1.173 by root, Sun Dec 9 19:42:57 2007 UTC vs. Revision 1.247 by root, Wed May 21 21:22:10 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.173 by root, Sun Dec 9 19:42:57 2007 UTC vs.
Revision 1.247 by root, Wed May 21 21:22:10 2008 UTC