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

Comparing libev/ev.c (file contents):
Revision 1.177 by root, Tue Dec 11 15:06:50 2007 UTC vs.
Revision 1.246 by root, Wed May 21 12:51:38 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	/**/
220		292
221	/*	293	/*
…		…
230		302
231	#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) */
232	#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) */
233	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */	305	/#define CLEANUP_INTERVAL (MAX_BLOCKTIME 5.) /* how often to try to free memory and re-check fds, TODO */
234		306
235	#if __GNUC__ >= 3	307	#if __GNUC__ >= 4
236	# define expect(expr,value) __builtin_expect ((expr),(value))	308	# define expect(expr,value) __builtin_expect ((expr),(value))
237	# define noinline __attribute__ ((noinline))	309	# define noinline __attribute__ ((noinline))
238	#else	310	#else
239	# define expect(expr,value) (expr)	311	# define expect(expr,value) (expr)
240	# define noinline	312	# define noinline
241	# if __STDC_VERSION__ < 199901L	313	# if __STDC_VERSION__ < 199901L && __GNUC__ < 2
242	# define inline	314	# define inline
243	# endif	315	# endif
244	#endif	316	#endif
245		317
246	#define expect_false(expr) expect ((expr) != 0, 0)	318	#define expect_false(expr) expect ((expr) != 0, 0)
…		…
261		333
262	typedef ev_watcher *W;	334	typedef ev_watcher *W;
263	typedef ev_watcher_list *WL;	335	typedef ev_watcher_list *WL;
264	typedef ev_watcher_time *WT;	336	typedef ev_watcher_time *WT;
265		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 */
266	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
267		346
268	#ifdef _WIN32	347	#ifdef _WIN32
269	# include "ev_win32.c"	348	# include "ev_win32.c"
270	#endif	349	#endif
271		350
…		…
292	perror (msg);	371	perror (msg);
293	abort ();	372	abort ();
294	}	373	}
295	}	374	}
296		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
297	static void (alloc)(void *ptr, long size);	391	static void (alloc)(void *ptr, long size) = ev_realloc_emul;
298		392
299	void	393	void
300	ev_set_allocator (void (cb)(void *ptr, long size))	394	ev_set_allocator (void (cb)(void *ptr, long size))
301	{	395	{
302	alloc = cb;	396	alloc = cb;
303	}	397	}
304		398
305	inline_speed void *	399	inline_speed void *
306	ev_realloc (void *ptr, long size)	400	ev_realloc (void *ptr, long size)
307	{	401	{
308	ptr = alloc ? alloc (ptr, size) : realloc (ptr, size);	402	ptr = alloc (ptr, size);
309		403
310	if (!ptr && size)	404	if (!ptr && size)
311	{	405	{
312	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);	406	fprintf (stderr, "libev: cannot allocate %ld bytes, aborting.", size);
313	abort ();	407	abort ();
…		…
336	W w;	430	W w;
337	int events;	431	int events;
338	} ANPENDING;	432	} ANPENDING;
339		433
340	#if EV_USE_INOTIFY	434	#if EV_USE_INOTIFY
		435	/* hash table entry per inotify-id */
341	typedef struct	436	typedef struct
342	{	437	{
343	WL head;	438	WL head;
344	} 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)
345	#endif	458	#endif
346		459
347	#if EV_MULTIPLICITY	460	#if EV_MULTIPLICITY
348		461
349	struct ev_loop	462	struct ev_loop
…		…
407	{	520	{
408	return ev_rt_now;	521	return ev_rt_now;
409	}	522	}
410	#endif	523	#endif
411		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
412	int inline_size	554	int inline_size
413	array_nextsize (int elem, int cur, int cnt)	555	array_nextsize (int elem, int cur, int cnt)
414	{	556	{
415	int ncur = cur + 1;	557	int ncur = cur + 1;
416		558
417	do	559	do
418	ncur <<= 1;	560	ncur <<= 1;
419	while (cnt > ncur);	561	while (cnt > ncur);
420		562
421	/* 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 */
422	if (elem * ncur > 4096)	564	if (elem * ncur > MALLOC_ROUND - sizeof (void ) 4)
423	{	565	{
424	ncur *= elem;	566	ncur *= elem;
425	ncur = (ncur + elem + 4095 + sizeof (void ) 4) & ~4095;	567	ncur = (ncur + elem + (MALLOC_ROUND - 1) + sizeof (void ) 4) & ~(MALLOC_ROUND - 1);
426	ncur = ncur - sizeof (void ) 4;	568	ncur = ncur - sizeof (void ) 4;
427	ncur /= elem;	569	ncur /= elem;
428	}	570	}
429		571
430	return ncur;	572	return ncur;
…		…
476	pendings [pri][w_->pending - 1].w = w_;	618	pendings [pri][w_->pending - 1].w = w_;
477	pendings [pri][w_->pending - 1].events = revents;	619	pendings [pri][w_->pending - 1].events = revents;
478	}	620	}
479	}	621	}
480		622
481	void inline_size	623	void inline_speed
482	queue_events (EV_P_ W *events, int eventcnt, int type)	624	queue_events (EV_P_ W *events, int eventcnt, int type)
483	{	625	{
484	int i;	626	int i;
485		627
486	for (i = 0; i < eventcnt; ++i)	628	for (i = 0; i < eventcnt; ++i)
…		…
533	{	675	{
534	int fd = fdchanges [i];	676	int fd = fdchanges [i];
535	ANFD *anfd = anfds + fd;	677	ANFD *anfd = anfds + fd;
536	ev_io *w;	678	ev_io *w;
537		679
538	int events = 0;	680	unsigned char events = 0;
539		681
540	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)
541	events \|= w->events;	683	events \|= (unsigned char)w->events;
542		684
543	#if EV_SELECT_IS_WINSOCKET	685	#if EV_SELECT_IS_WINSOCKET
544	if (events)	686	if (events)
545	{	687	{
546	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
547	anfd->handle = _get_osfhandle (fd);	692	anfd->handle = _get_osfhandle (fd);
		693	#endif
548	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));
549	}	695	}
550	#endif	696	#endif
551		697
		698	{
		699	unsigned char o_events = anfd->events;
		700	unsigned char o_reify = anfd->reify;
		701
552	anfd->reify = 0;	702	anfd->reify = 0;
553
554	backend_modify (EV_A_ fd, anfd->events, events);
555	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	}
556	}	708	}
557		709
558	fdchangecnt = 0;	710	fdchangecnt = 0;
559	}	711	}
560		712
561	void inline_size	713	void inline_size
562	fd_change (EV_P_ int fd)	714	fd_change (EV_P_ int fd, int flags)
563	{	715	{
564	if (expect_false (anfds [fd].reify))	716	unsigned char reify = anfds [fd].reify;
565	return;
566
567	anfds [fd].reify = 1;	717	anfds [fd].reify \|= flags;
568		718
		719	if (expect_true (!reify))
		720	{
569	++fdchangecnt;	721	++fdchangecnt;
570	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);	722	array_needsize (int, fdchanges, fdchangemax, fdchangecnt, EMPTY2);
571	fdchanges [fdchangecnt - 1] = fd;	723	fdchanges [fdchangecnt - 1] = fd;
		724	}
572	}	725	}
573		726
574	void inline_speed	727	void inline_speed
575	fd_kill (EV_P_ int fd)	728	fd_kill (EV_P_ int fd)
576	{	729	{
…		…
627		780
628	for (fd = 0; fd < anfdmax; ++fd)	781	for (fd = 0; fd < anfdmax; ++fd)
629	if (anfds [fd].events)	782	if (anfds [fd].events)
630	{	783	{
631	anfds [fd].events = 0;	784	anfds [fd].events = 0;
632	fd_change (EV_A_ fd);	785	fd_change (EV_A_ fd, EV_IOFDSET \| 1);
633	}	786	}
634	}	787	}
635		788
636	/*****************************************************************************/	789	/*****************************************************************************/
637		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
		808	/* towards the root */
638	void inline_speed	809	void inline_speed
639	upheap (WT *heap, int k)	810	upheap (ANHE *heap, int k)
640	{	811	{
641	WT w = heap [k];	812	ANHE he = heap [k];
642		813
643	while (k && heap [k >> 1]->at > w->at)	814	for (;;)
644	{	815	{
		816	int p = ((k - HEAP0 - 1) / DHEAP) + HEAP0;
		817
		818	if (p == k \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		819	break;
		820
645	heap [k] = heap [k >> 1];	821	heap [k] = heap [p];
646	((W)heap [k])->active = k + 1;	822	ev_active (ANHE_w (heap [k])) = k;
647	k >>= 1;	823	k = p;
648	}	824	}
649		825
		826	ev_active (ANHE_w (he)) = k;
650	heap [k] = w;	827	heap [k] = he;
651	((W)heap [k])->active = k + 1;
652
653	}	828	}
654		829
		830	/* away from the root */
655	void inline_speed	831	void inline_speed
656	downheap (WT *heap, int N, int k)	832	downheap (ANHE *heap, int N, int k)
657	{	833	{
658	WT w = heap [k];	834	ANHE he = heap [k];
		835	ANHE *E = heap + N + HEAP0;
659		836
660	while (k < (N >> 1))	837	for (;;)
661	{	838	{
662	int j = k << 1;	839	ev_tstamp minat;
		840	ANHE *minpos;
		841	ANHE pos = heap + DHEAP (k - HEAP0) + HEAP0;
663		842
664	if (j + 1 < N && heap [j]->at > heap [j + 1]->at)	843	// find minimum child
		844	if (expect_true (pos + DHEAP - 1 < E))
665	++j;	845	{
666		846	/* fast path / (minpos = pos + 0), (minat = ANHE_at (minpos));
667	if (w->at <= heap [j]->at)	847	if ( ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		848	if ( ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		849	if ( ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		850	}
		851	else if (pos < E)
		852	{
		853	/* slow path / (minpos = pos + 0), (minat = ANHE_at (minpos));
		854	if (pos + 1 < E && ANHE_at (pos [1]) < minat) (minpos = pos + 1), (minat = ANHE_at (*minpos));
		855	if (pos + 2 < E && ANHE_at (pos [2]) < minat) (minpos = pos + 2), (minat = ANHE_at (*minpos));
		856	if (pos + 3 < E && ANHE_at (pos [3]) < minat) (minpos = pos + 3), (minat = ANHE_at (*minpos));
		857	}
		858	else
668	break;	859	break;
669		860
		861	if (ANHE_at (he) <= minat)
		862	break;
		863
		864	ev_active (ANHE_w (*minpos)) = k;
		865	heap [k] = *minpos;
		866
		867	k = minpos - heap;
		868	}
		869
		870	ev_active (ANHE_w (he)) = k;
		871	heap [k] = he;
		872	}
		873
		874	#else // 4HEAP
		875
		876	#define HEAP0 1
		877
		878	/* towards the root */
		879	void inline_speed
		880	upheap (ANHE *heap, int k)
		881	{
		882	ANHE he = heap [k];
		883
		884	for (;;)
		885	{
		886	int p = k >> 1;
		887
		888	/* maybe we could use a dummy element at heap [0]? */
		889	if (!p \|\| ANHE_at (heap [p]) <= ANHE_at (he))
		890	break;
		891
670	heap [k] = heap [j];	892	heap [k] = heap [p];
671	((W)heap [k])->active = k + 1;	893	ev_active (ANHE_w (heap [k])) = k;
672	k = j;	894	k = p;
673	}	895	}
674		896
675	heap [k] = w;	897	heap [k] = he;
676	((W)heap [k])->active = k + 1;	898	ev_active (ANHE_w (heap [k])) = k;
677	}	899	}
		900
		901	/* away from the root */
		902	void inline_speed
		903	downheap (ANHE *heap, int N, int k)
		904	{
		905	ANHE he = heap [k];
		906
		907	for (;;)
		908	{
		909	int c = k << 1;
		910
		911	if (c > N)
		912	break;
		913
		914	c += c + 1 < N && ANHE_at (heap [c]) > ANHE_at (heap [c + 1])
		915	? 1 : 0;
		916
		917	if (ANHE_at (he) <= ANHE_at (heap [c]))
		918	break;
		919
		920	heap [k] = heap [c];
		921	ev_active (ANHE_w (heap [k])) = k;
		922
		923	k = c;
		924	}
		925
		926	heap [k] = he;
		927	ev_active (ANHE_w (he)) = k;
		928	}
		929	#endif
678		930
679	void inline_size	931	void inline_size
680	adjustheap (WT *heap, int N, int k)	932	adjustheap (ANHE *heap, int N, int k)
681	{	933	{
682	upheap (heap, k);	934	upheap (heap, k);
683	downheap (heap, N, k);	935	downheap (heap, N, k);
684	}	936	}
685		937
686	/*****************************************************************************/	938	/*****************************************************************************/
687		939
688	typedef struct	940	typedef struct
689	{	941	{
690	WL head;	942	WL head;
691	sig_atomic_t volatile gotsig;	943	EV_ATOMIC_T gotsig;
692	} ANSIG;	944	} ANSIG;
693		945
694	static ANSIG *signals;	946	static ANSIG *signals;
695	static int signalmax;	947	static int signalmax;
696		948
697	static int sigpipe [2];	949	static EV_ATOMIC_T gotsig;
698	static sig_atomic_t volatile gotsig;
699	static ev_io sigev;
700		950
701	void inline_size	951	void inline_size
702	signals_init (ANSIG *base, int count)	952	signals_init (ANSIG *base, int count)
703	{	953	{
704	while (count--)	954	while (count--)
…		…
708		958
709	++base;	959	++base;
710	}	960	}
711	}	961	}
712		962
713	static void	963	/*****************************************************************************/
714	sighandler (int signum)
715	{
716	#if _WIN32
717	signal (signum, sighandler);
718	#endif
719
720	signals [signum - 1].gotsig = 1;
721
722	if (!gotsig)
723	{
724	int old_errno = errno;
725	gotsig = 1;
726	write (sigpipe [1], &signum, 1);
727	errno = old_errno;
728	}
729	}
730
731	void noinline
732	ev_feed_signal_event (EV_P_ int signum)
733	{
734	WL w;
735
736	#if EV_MULTIPLICITY
737	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
738	#endif
739
740	--signum;
741
742	if (signum < 0 \|\| signum >= signalmax)
743	return;
744
745	signals [signum].gotsig = 0;
746
747	for (w = signals [signum].head; w; w = w->next)
748	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
749	}
750
751	static void
752	sigcb (EV_P_ ev_io *iow, int revents)
753	{
754	int signum;
755
756	read (sigpipe [0], &revents, 1);
757	gotsig = 0;
758
759	for (signum = signalmax; signum--; )
760	if (signals [signum].gotsig)
761	ev_feed_signal_event (EV_A_ signum + 1);
762	}
763		964
764	void inline_speed	965	void inline_speed
765	fd_intern (int fd)	966	fd_intern (int fd)
766	{	967	{
767	#ifdef _WIN32	968	#ifdef _WIN32
…		…
772	fcntl (fd, F_SETFL, O_NONBLOCK);	973	fcntl (fd, F_SETFL, O_NONBLOCK);
773	#endif	974	#endif
774	}	975	}
775		976
776	static void noinline	977	static void noinline
777	siginit (EV_P)	978	evpipe_init (EV_P)
778	{	979	{
		980	if (!ev_is_active (&pipeev))
		981	{
		982	#if EV_USE_EVENTFD
		983	if ((evfd = eventfd (0, 0)) >= 0)
		984	{
		985	evpipe [0] = -1;
		986	fd_intern (evfd);
		987	ev_io_set (&pipeev, evfd, EV_READ);
		988	}
		989	else
		990	#endif
		991	{
		992	while (pipe (evpipe))
		993	syserr ("(libev) error creating signal/async pipe");
		994
779	fd_intern (sigpipe [0]);	995	fd_intern (evpipe [0]);
780	fd_intern (sigpipe [1]);	996	fd_intern (evpipe [1]);
		997	ev_io_set (&pipeev, evpipe [0], EV_READ);
		998	}
781		999
782	ev_io_set (&sigev, sigpipe [0], EV_READ);
783	ev_io_start (EV_A_ &sigev);	1000	ev_io_start (EV_A_ &pipeev);
784	ev_unref (EV_A); /* child watcher should not keep loop alive */	1001	ev_unref (EV_A); /* watcher should not keep loop alive */
		1002	}
		1003	}
		1004
		1005	void inline_size
		1006	evpipe_write (EV_P_ EV_ATOMIC_T *flag)
		1007	{
		1008	if (!*flag)
		1009	{
		1010	int old_errno = errno; /* save errno because write might clobber it */
		1011
		1012	*flag = 1;
		1013
		1014	#if EV_USE_EVENTFD
		1015	if (evfd >= 0)
		1016	{
		1017	uint64_t counter = 1;
		1018	write (evfd, &counter, sizeof (uint64_t));
		1019	}
		1020	else
		1021	#endif
		1022	write (evpipe [1], &old_errno, 1);
		1023
		1024	errno = old_errno;
		1025	}
		1026	}
		1027
		1028	static void
		1029	pipecb (EV_P_ ev_io *iow, int revents)
		1030	{
		1031	#if EV_USE_EVENTFD
		1032	if (evfd >= 0)
		1033	{
		1034	uint64_t counter;
		1035	read (evfd, &counter, sizeof (uint64_t));
		1036	}
		1037	else
		1038	#endif
		1039	{
		1040	char dummy;
		1041	read (evpipe [0], &dummy, 1);
		1042	}
		1043
		1044	if (gotsig && ev_is_default_loop (EV_A))
		1045	{
		1046	int signum;
		1047	gotsig = 0;
		1048
		1049	for (signum = signalmax; signum--; )
		1050	if (signals [signum].gotsig)
		1051	ev_feed_signal_event (EV_A_ signum + 1);
		1052	}
		1053
		1054	#if EV_ASYNC_ENABLE
		1055	if (gotasync)
		1056	{
		1057	int i;
		1058	gotasync = 0;
		1059
		1060	for (i = asynccnt; i--; )
		1061	if (asyncs [i]->sent)
		1062	{
		1063	asyncs [i]->sent = 0;
		1064	ev_feed_event (EV_A_ asyncs [i], EV_ASYNC);
		1065	}
		1066	}
		1067	#endif
785	}	1068	}
786		1069
787	/*****************************************************************************/	1070	/*****************************************************************************/
788		1071
		1072	static void
		1073	ev_sighandler (int signum)
		1074	{
		1075	#if EV_MULTIPLICITY
		1076	struct ev_loop *loop = &default_loop_struct;
		1077	#endif
		1078
		1079	#if _WIN32
		1080	signal (signum, ev_sighandler);
		1081	#endif
		1082
		1083	signals [signum - 1].gotsig = 1;
		1084	evpipe_write (EV_A_ &gotsig);
		1085	}
		1086
		1087	void noinline
		1088	ev_feed_signal_event (EV_P_ int signum)
		1089	{
		1090	WL w;
		1091
		1092	#if EV_MULTIPLICITY
		1093	assert (("feeding signal events is only supported in the default loop", loop == ev_default_loop_ptr));
		1094	#endif
		1095
		1096	--signum;
		1097
		1098	if (signum < 0 \|\| signum >= signalmax)
		1099	return;
		1100
		1101	signals [signum].gotsig = 0;
		1102
		1103	for (w = signals [signum].head; w; w = w->next)
		1104	ev_feed_event (EV_A_ (W)w, EV_SIGNAL);
		1105	}
		1106
		1107	/*****************************************************************************/
		1108
789	static ev_child *childs [EV_PID_HASHSIZE];	1109	static WL childs [EV_PID_HASHSIZE];
790		1110
791	#ifndef _WIN32	1111	#ifndef _WIN32
792		1112
793	static ev_signal childev;	1113	static ev_signal childev;
794		1114
		1115	#ifndef WIFCONTINUED
		1116	# define WIFCONTINUED(status) 0
		1117	#endif
		1118
795	void inline_speed	1119	void inline_speed
796	child_reap (EV_P_ ev_signal *sw, int chain, int pid, int status)	1120	child_reap (EV_P_ int chain, int pid, int status)
797	{	1121	{
798	ev_child *w;	1122	ev_child *w;
		1123	int traced = WIFSTOPPED (status) \|\| WIFCONTINUED (status);
799		1124
800	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)	1125	for (w = (ev_child )childs [chain & (EV_PID_HASHSIZE - 1)]; w; w = (ev_child )((WL)w)->next)
		1126	{
801	if (w->pid == pid \|\| !w->pid)	1127	if ((w->pid == pid \|\| !w->pid)
		1128	&& (!traced \|\| (w->flags & 1)))
802	{	1129	{
803	ev_set_priority (w, ev_priority (sw)); /* need to do it now */	1130	ev_set_priority (w, EV_MAXPRI); /* need to do it now, this must be the same prio as the signal watcher itself */
804	w->rpid = pid;	1131	w->rpid = pid;
805	w->rstatus = status;	1132	w->rstatus = status;
806	ev_feed_event (EV_A_ (W)w, EV_CHILD);	1133	ev_feed_event (EV_A_ (W)w, EV_CHILD);
807	}	1134	}
		1135	}
808	}	1136	}
809		1137
810	#ifndef WCONTINUED	1138	#ifndef WCONTINUED
811	# define WCONTINUED 0	1139	# define WCONTINUED 0
812	#endif	1140	#endif
…		…
821	if (!WCONTINUED	1149	if (!WCONTINUED
822	\|\| errno != EINVAL	1150	\|\| errno != EINVAL
823	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))	1151	\|\| 0 >= (pid = waitpid (-1, &status, WNOHANG \| WUNTRACED)))
824	return;	1152	return;
825		1153
826	/* make sure we are called again until all childs have been reaped */	1154	/* make sure we are called again until all children have been reaped */
827	/* we need to do it this way so that the callback gets called before we continue */	1155	/* we need to do it this way so that the callback gets called before we continue */
828	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);	1156	ev_feed_event (EV_A_ (W)sw, EV_SIGNAL);
829		1157
830	child_reap (EV_A_ sw, pid, pid, status);	1158	child_reap (EV_A_ pid, pid, status);
831	if (EV_PID_HASHSIZE > 1)	1159	if (EV_PID_HASHSIZE > 1)
832	child_reap (EV_A_ sw, 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */	1160	child_reap (EV_A_ 0, pid, status); /* this might trigger a watcher twice, but feed_event catches that */
833	}	1161	}
834		1162
835	#endif	1163	#endif
836		1164
837	/*****************************************************************************/	1165	/*****************************************************************************/
…		…
909	}	1237	}
910		1238
911	unsigned int	1239	unsigned int
912	ev_embeddable_backends (void)	1240	ev_embeddable_backends (void)
913	{	1241	{
914	return EVBACKEND_EPOLL	1242	int flags = EVBACKEND_EPOLL \| EVBACKEND_KQUEUE \| EVBACKEND_PORT;
915	\| EVBACKEND_KQUEUE	1243
916	\| EVBACKEND_PORT;	1244	/* epoll embeddability broken on all linux versions up to at least 2.6.23 */
		1245	/* please fix it and tell me how to detect the fix */
		1246	flags &= ~EVBACKEND_EPOLL;
		1247
		1248	return flags;
917	}	1249	}
918		1250
919	unsigned int	1251	unsigned int
920	ev_backend (EV_P)	1252	ev_backend (EV_P)
921	{	1253	{
…		…
924		1256
925	unsigned int	1257	unsigned int
926	ev_loop_count (EV_P)	1258	ev_loop_count (EV_P)
927	{	1259	{
928	return loop_count;	1260	return loop_count;
		1261	}
		1262
		1263	void
		1264	ev_set_io_collect_interval (EV_P_ ev_tstamp interval)
		1265	{
		1266	io_blocktime = interval;
		1267	}
		1268
		1269	void
		1270	ev_set_timeout_collect_interval (EV_P_ ev_tstamp interval)
		1271	{
		1272	timeout_blocktime = interval;
929	}	1273	}
930		1274
931	static void noinline	1275	static void noinline
932	loop_init (EV_P_ unsigned int flags)	1276	loop_init (EV_P_ unsigned int flags)
933	{	1277	{
…		…
939	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	1283	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
940	have_monotonic = 1;	1284	have_monotonic = 1;
941	}	1285	}
942	#endif	1286	#endif
943		1287
944	ev_rt_now = ev_time ();	1288	ev_rt_now = ev_time ();
945	mn_now = get_clock ();	1289	mn_now = get_clock ();
946	now_floor = mn_now;	1290	now_floor = mn_now;
947	rtmn_diff = ev_rt_now - mn_now;	1291	rtmn_diff = ev_rt_now - mn_now;
		1292
		1293	io_blocktime = 0.;
		1294	timeout_blocktime = 0.;
		1295	backend = 0;
		1296	backend_fd = -1;
		1297	gotasync = 0;
		1298	#if EV_USE_INOTIFY
		1299	fs_fd = -2;
		1300	#endif
948		1301
949	/* pid check not overridable via env */	1302	/* pid check not overridable via env */
950	#ifndef _WIN32	1303	#ifndef _WIN32
951	if (flags & EVFLAG_FORKCHECK)	1304	if (flags & EVFLAG_FORKCHECK)
952	curpid = getpid ();	1305	curpid = getpid ();
…		…
955	if (!(flags & EVFLAG_NOENV)	1308	if (!(flags & EVFLAG_NOENV)
956	&& !enable_secure ()	1309	&& !enable_secure ()
957	&& getenv ("LIBEV_FLAGS"))	1310	&& getenv ("LIBEV_FLAGS"))
958	flags = atoi (getenv ("LIBEV_FLAGS"));	1311	flags = atoi (getenv ("LIBEV_FLAGS"));
959		1312
960	if (!(flags & 0x0000ffffUL))	1313	if (!(flags & 0x0000ffffU))
961	flags \|= ev_recommended_backends ();	1314	flags \|= ev_recommended_backends ();
962
963	backend = 0;
964	backend_fd = -1;
965	#if EV_USE_INOTIFY
966	fs_fd = -2;
967	#endif
968		1315
969	#if EV_USE_PORT	1316	#if EV_USE_PORT
970	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);	1317	if (!backend && (flags & EVBACKEND_PORT )) backend = port_init (EV_A_ flags);
971	#endif	1318	#endif
972	#if EV_USE_KQUEUE	1319	#if EV_USE_KQUEUE
…		…
980	#endif	1327	#endif
981	#if EV_USE_SELECT	1328	#if EV_USE_SELECT
982	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);	1329	if (!backend && (flags & EVBACKEND_SELECT)) backend = select_init (EV_A_ flags);
983	#endif	1330	#endif
984		1331
985	ev_init (&sigev, sigcb);	1332	ev_init (&pipeev, pipecb);
986	ev_set_priority (&sigev, EV_MAXPRI);	1333	ev_set_priority (&pipeev, EV_MAXPRI);
987	}	1334	}
988	}	1335	}
989		1336
990	static void noinline	1337	static void noinline
991	loop_destroy (EV_P)	1338	loop_destroy (EV_P)
992	{	1339	{
993	int i;	1340	int i;
		1341
		1342	if (ev_is_active (&pipeev))
		1343	{
		1344	ev_ref (EV_A); /* signal watcher */
		1345	ev_io_stop (EV_A_ &pipeev);
		1346
		1347	#if EV_USE_EVENTFD
		1348	if (evfd >= 0)
		1349	close (evfd);
		1350	#endif
		1351
		1352	if (evpipe [0] >= 0)
		1353	{
		1354	close (evpipe [0]);
		1355	close (evpipe [1]);
		1356	}
		1357	}
994		1358
995	#if EV_USE_INOTIFY	1359	#if EV_USE_INOTIFY
996	if (fs_fd >= 0)	1360	if (fs_fd >= 0)
997	close (fs_fd);	1361	close (fs_fd);
998	#endif	1362	#endif
…		…
1021	array_free (pending, [i]);	1385	array_free (pending, [i]);
1022	#if EV_IDLE_ENABLE	1386	#if EV_IDLE_ENABLE
1023	array_free (idle, [i]);	1387	array_free (idle, [i]);
1024	#endif	1388	#endif
1025	}	1389	}
		1390
		1391	ev_free (anfds); anfdmax = 0;
1026		1392
1027	/* have to use the microsoft-never-gets-it-right macro */	1393	/* have to use the microsoft-never-gets-it-right macro */
1028	array_free (fdchange, EMPTY);	1394	array_free (fdchange, EMPTY);
1029	array_free (timer, EMPTY);	1395	array_free (timer, EMPTY);
1030	#if EV_PERIODIC_ENABLE	1396	#if EV_PERIODIC_ENABLE
1031	array_free (periodic, EMPTY);	1397	array_free (periodic, EMPTY);
1032	#endif	1398	#endif
		1399	#if EV_FORK_ENABLE
		1400	array_free (fork, EMPTY);
		1401	#endif
1033	array_free (prepare, EMPTY);	1402	array_free (prepare, EMPTY);
1034	array_free (check, EMPTY);	1403	array_free (check, EMPTY);
		1404	#if EV_ASYNC_ENABLE
		1405	array_free (async, EMPTY);
		1406	#endif
1035		1407
1036	backend = 0;	1408	backend = 0;
1037	}	1409	}
1038		1410
		1411	#if EV_USE_INOTIFY
1039	void inline_size infy_fork (EV_P);	1412	void inline_size infy_fork (EV_P);
		1413	#endif
1040		1414
1041	void inline_size	1415	void inline_size
1042	loop_fork (EV_P)	1416	loop_fork (EV_P)
1043	{	1417	{
1044	#if EV_USE_PORT	1418	#if EV_USE_PORT
…		…
1052	#endif	1426	#endif
1053	#if EV_USE_INOTIFY	1427	#if EV_USE_INOTIFY
1054	infy_fork (EV_A);	1428	infy_fork (EV_A);
1055	#endif	1429	#endif
1056		1430
1057	if (ev_is_active (&sigev))	1431	if (ev_is_active (&pipeev))
1058	{	1432	{
1059	/* default loop */	1433	/* this "locks" the handlers against writing to the pipe */
		1434	/* while we modify the fd vars */
		1435	gotsig = 1;
		1436	#if EV_ASYNC_ENABLE
		1437	gotasync = 1;
		1438	#endif
1060		1439
1061	ev_ref (EV_A);	1440	ev_ref (EV_A);
1062	ev_io_stop (EV_A_ &sigev);	1441	ev_io_stop (EV_A_ &pipeev);
		1442
		1443	#if EV_USE_EVENTFD
		1444	if (evfd >= 0)
		1445	close (evfd);
		1446	#endif
		1447
		1448	if (evpipe [0] >= 0)
		1449	{
1063	close (sigpipe [0]);	1450	close (evpipe [0]);
1064	close (sigpipe [1]);	1451	close (evpipe [1]);
		1452	}
1065		1453
1066	while (pipe (sigpipe))
1067	syserr ("(libev) error creating pipe");
1068
1069	siginit (EV_A);	1454	evpipe_init (EV_A);
		1455	/* now iterate over everything, in case we missed something */
		1456	pipecb (EV_A_ &pipeev, EV_READ);
1070	}	1457	}
1071		1458
1072	postfork = 0;	1459	postfork = 0;
1073	}	1460	}
1074		1461
…		…
1096	}	1483	}
1097		1484
1098	void	1485	void
1099	ev_loop_fork (EV_P)	1486	ev_loop_fork (EV_P)
1100	{	1487	{
1101	postfork = 1;	1488	postfork = 1; /* must be in line with ev_default_fork */
1102	}	1489	}
1103
1104	#endif	1490	#endif
1105		1491
1106	#if EV_MULTIPLICITY	1492	#if EV_MULTIPLICITY
1107	struct ev_loop *	1493	struct ev_loop *
1108	ev_default_loop_init (unsigned int flags)	1494	ev_default_loop_init (unsigned int flags)
1109	#else	1495	#else
1110	int	1496	int
1111	ev_default_loop (unsigned int flags)	1497	ev_default_loop (unsigned int flags)
1112	#endif	1498	#endif
1113	{	1499	{
1114	if (sigpipe [0] == sigpipe [1])
1115	if (pipe (sigpipe))
1116	return 0;
1117
1118	if (!ev_default_loop_ptr)	1500	if (!ev_default_loop_ptr)
1119	{	1501	{
1120	#if EV_MULTIPLICITY	1502	#if EV_MULTIPLICITY
1121	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;	1503	struct ev_loop *loop = ev_default_loop_ptr = &default_loop_struct;
1122	#else	1504	#else
…		…
1125		1507
1126	loop_init (EV_A_ flags);	1508	loop_init (EV_A_ flags);
1127		1509
1128	if (ev_backend (EV_A))	1510	if (ev_backend (EV_A))
1129	{	1511	{
1130	siginit (EV_A);
1131
1132	#ifndef _WIN32	1512	#ifndef _WIN32
1133	ev_signal_init (&childev, childcb, SIGCHLD);	1513	ev_signal_init (&childev, childcb, SIGCHLD);
1134	ev_set_priority (&childev, EV_MAXPRI);	1514	ev_set_priority (&childev, EV_MAXPRI);
1135	ev_signal_start (EV_A_ &childev);	1515	ev_signal_start (EV_A_ &childev);
1136	ev_unref (EV_A); /* child watcher should not keep loop alive */	1516	ev_unref (EV_A); /* child watcher should not keep loop alive */
…		…
1153	#ifndef _WIN32	1533	#ifndef _WIN32
1154	ev_ref (EV_A); /* child watcher */	1534	ev_ref (EV_A); /* child watcher */
1155	ev_signal_stop (EV_A_ &childev);	1535	ev_signal_stop (EV_A_ &childev);
1156	#endif	1536	#endif
1157		1537
1158	ev_ref (EV_A); /* signal watcher */
1159	ev_io_stop (EV_A_ &sigev);
1160
1161	close (sigpipe [0]); sigpipe [0] = 0;
1162	close (sigpipe [1]); sigpipe [1] = 0;
1163
1164	loop_destroy (EV_A);	1538	loop_destroy (EV_A);
1165	}	1539	}
1166		1540
1167	void	1541	void
1168	ev_default_fork (void)	1542	ev_default_fork (void)
…		…
1170	#if EV_MULTIPLICITY	1544	#if EV_MULTIPLICITY
1171	struct ev_loop *loop = ev_default_loop_ptr;	1545	struct ev_loop *loop = ev_default_loop_ptr;
1172	#endif	1546	#endif
1173		1547
1174	if (backend)	1548	if (backend)
1175	postfork = 1;	1549	postfork = 1; /* must be in line with ev_loop_fork */
1176	}	1550	}
1177		1551
1178	/*****************************************************************************/	1552	/*****************************************************************************/
1179		1553
1180	void	1554	void
…		…
1200	p->w->pending = 0;	1574	p->w->pending = 0;
1201	EV_CB_INVOKE (p->w, p->events);	1575	EV_CB_INVOKE (p->w, p->events);
1202	}	1576	}
1203	}	1577	}
1204	}	1578	}
1205
1206	void inline_size
1207	timers_reify (EV_P)
1208	{
1209	while (timercnt && ((WT)timers [0])->at <= mn_now)
1210	{
1211	ev_timer *w = timers [0];
1212
1213	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
1214
1215	/* first reschedule or stop timer */
1216	if (w->repeat)
1217	{
1218	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
1219
1220	((WT)w)->at += w->repeat;
1221	if (((WT)w)->at < mn_now)
1222	((WT)w)->at = mn_now;
1223
1224	downheap ((WT *)timers, timercnt, 0);
1225	}
1226	else
1227	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
1228
1229	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
1230	}
1231	}
1232
1233	#if EV_PERIODIC_ENABLE
1234	void inline_size
1235	periodics_reify (EV_P)
1236	{
1237	while (periodiccnt && ((WT)periodics [0])->at <= ev_rt_now)
1238	{
1239	ev_periodic *w = periodics [0];
1240
1241	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
1242
1243	/* first reschedule or stop timer */
1244	if (w->reschedule_cb)
1245	{
1246	((WT)w)->at = w->reschedule_cb (w, ev_rt_now + TIME_EPSILON);
1247	assert (("ev_periodic reschedule callback returned time in the past", ((WT)w)->at > ev_rt_now));
1248	downheap ((WT *)periodics, periodiccnt, 0);
1249	}
1250	else if (w->interval)
1251	{
1252	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1253	if (((WT)w)->at - ev_rt_now <= TIME_EPSILON) ((WT)w)->at += w->interval;
1254	assert (("ev_periodic timeout in the past detected while processing timers, negative interval?", ((WT)w)->at > ev_rt_now));
1255	downheap ((WT *)periodics, periodiccnt, 0);
1256	}
1257	else
1258	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
1259
1260	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
1261	}
1262	}
1263
1264	static void noinline
1265	periodics_reschedule (EV_P)
1266	{
1267	int i;
1268
1269	/* adjust periodics after time jump */
1270	for (i = 0; i < periodiccnt; ++i)
1271	{
1272	ev_periodic *w = periodics [i];
1273
1274	if (w->reschedule_cb)
1275	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);
1276	else if (w->interval)
1277	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1278	}
1279
1280	/* now rebuild the heap */
1281	for (i = periodiccnt >> 1; i--; )
1282	downheap ((WT *)periodics, periodiccnt, i);
1283	}
1284	#endif
1285		1579
1286	#if EV_IDLE_ENABLE	1580	#if EV_IDLE_ENABLE
1287	void inline_size	1581	void inline_size
1288	idle_reify (EV_P)	1582	idle_reify (EV_P)
1289	{	1583	{
…		…
1304	}	1598	}
1305	}	1599	}
1306	}	1600	}
1307	#endif	1601	#endif
1308		1602
1309	int inline_size	1603	void inline_size
1310	time_update_monotonic (EV_P)	1604	timers_reify (EV_P)
1311	{	1605	{
		1606	while (timercnt && ANHE_at (timers [HEAP0]) < mn_now)
		1607	{
		1608	ev_timer w = (ev_timer )ANHE_w (timers [HEAP0]);
		1609
		1610	/assert (("inactive timer on timer heap detected", ev_is_active (w)));/
		1611
		1612	/* first reschedule or stop timer */
		1613	if (w->repeat)
		1614	{
		1615	ev_at (w) += w->repeat;
		1616	if (ev_at (w) < mn_now)
		1617	ev_at (w) = mn_now;
		1618
		1619	assert (("negative ev_timer repeat value found while processing timers", w->repeat > 0.));
		1620
		1621	ANHE_at_set (timers [HEAP0]);
		1622	downheap (timers, timercnt, HEAP0);
		1623	}
		1624	else
		1625	ev_timer_stop (EV_A_ w); /* nonrepeating: stop timer */
		1626
		1627	ev_feed_event (EV_A_ (W)w, EV_TIMEOUT);
		1628	}
		1629	}
		1630
		1631	#if EV_PERIODIC_ENABLE
		1632	void inline_size
		1633	periodics_reify (EV_P)
		1634	{
		1635	while (periodiccnt && ANHE_at (periodics [HEAP0]) < ev_rt_now)
		1636	{
		1637	ev_periodic w = (ev_periodic )ANHE_w (periodics [HEAP0]);
		1638
		1639	/assert (("inactive timer on periodic heap detected", ev_is_active (w)));/
		1640
		1641	/* first reschedule or stop timer */
		1642	if (w->reschedule_cb)
		1643	{
		1644	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1645
		1646	assert (("ev_periodic reschedule callback returned time in the past", ev_at (w) >= ev_rt_now));
		1647
		1648	ANHE_at_set (periodics [HEAP0]);
		1649	downheap (periodics, periodiccnt, HEAP0);
		1650	}
		1651	else if (w->interval)
		1652	{
		1653	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1654	/* if next trigger time is not sufficiently in the future, put it there */
		1655	/* this might happen because of floating point inexactness */
		1656	if (ev_at (w) - ev_rt_now < TIME_EPSILON)
		1657	{
		1658	ev_at (w) += w->interval;
		1659
		1660	/* if interval is unreasonably low we might still have a time in the past */
		1661	/* so correct this. this will make the periodic very inexact, but the user */
		1662	/* has effectively asked to get triggered more often than possible */
		1663	if (ev_at (w) < ev_rt_now)
		1664	ev_at (w) = ev_rt_now;
		1665	}
		1666
		1667	ANHE_at_set (periodics [HEAP0]);
		1668	downheap (periodics, periodiccnt, HEAP0);
		1669	}
		1670	else
		1671	ev_periodic_stop (EV_A_ w); /* nonrepeating: stop timer */
		1672
		1673	ev_feed_event (EV_A_ (W)w, EV_PERIODIC);
		1674	}
		1675	}
		1676
		1677	static void noinline
		1678	periodics_reschedule (EV_P)
		1679	{
		1680	int i;
		1681
		1682	/* adjust periodics after time jump */
		1683	for (i = HEAP0; i < periodiccnt + HEAP0; ++i)
		1684	{
		1685	ev_periodic w = (ev_periodic )ANHE_w (periodics [i]);
		1686
		1687	if (w->reschedule_cb)
		1688	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
		1689	else if (w->interval)
		1690	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
		1691
		1692	ANHE_at_set (periodics [i]);
		1693	}
		1694
		1695	/* we don't use floyds algorithm, uphead is simpler and is more cache-efficient */
		1696	/* also, this is easy and corretc for both 2-heaps and 4-heaps */
		1697	for (i = 0; i < periodiccnt; ++i)
		1698	upheap (periodics, i + HEAP0);
		1699	}
		1700	#endif
		1701
		1702	void inline_speed
		1703	time_update (EV_P_ ev_tstamp max_block)
		1704	{
		1705	int i;
		1706
		1707	#if EV_USE_MONOTONIC
		1708	if (expect_true (have_monotonic))
		1709	{
		1710	ev_tstamp odiff = rtmn_diff;
		1711
1312	mn_now = get_clock ();	1712	mn_now = get_clock ();
1313		1713
		1714	/* only fetch the realtime clock every 0.5MIN_TIMEJUMP seconds /
		1715	/* interpolate in the meantime */
1314	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))	1716	if (expect_true (mn_now - now_floor < MIN_TIMEJUMP * .5))
1315	{	1717	{
1316	ev_rt_now = rtmn_diff + mn_now;	1718	ev_rt_now = rtmn_diff + mn_now;
1317	return 0;	1719	return;
1318	}	1720	}
1319	else	1721
1320	{
1321	now_floor = mn_now;	1722	now_floor = mn_now;
1322	ev_rt_now = ev_time ();	1723	ev_rt_now = ev_time ();
1323	return 1;
1324	}
1325	}
1326		1724
1327	void inline_size	1725	/* loop a few times, before making important decisions.
1328	time_update (EV_P)	1726	* on the choice of "4": one iteration isn't enough,
1329	{	1727	* in case we get preempted during the calls to
1330	int i;	1728	* ev_time and get_clock. a second call is almost guaranteed
1331		1729	* to succeed in that case, though. and looping a few more times
1332	#if EV_USE_MONOTONIC	1730	* doesn't hurt either as we only do this on time-jumps or
1333	if (expect_true (have_monotonic))	1731	* in the unlikely event of having been preempted here.
1334	{	1732	*/
1335	if (time_update_monotonic (EV_A))	1733	for (i = 4; --i; )
1336	{	1734	{
1337	ev_tstamp odiff = rtmn_diff;
1338
1339	/* loop a few times, before making important decisions.
1340	* on the choice of "4": one iteration isn't enough,
1341	* in case we get preempted during the calls to
1342	* ev_time and get_clock. a second call is almost guaranteed
1343	* to succeed in that case, though. and looping a few more times
1344	* doesn't hurt either as we only do this on time-jumps or
1345	* in the unlikely event of having been preempted here.
1346	*/
1347	for (i = 4; --i; )
1348	{
1349	rtmn_diff = ev_rt_now - mn_now;	1735	rtmn_diff = ev_rt_now - mn_now;
1350		1736
1351	if (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP)	1737	if (expect_true (fabs (odiff - rtmn_diff) < MIN_TIMEJUMP))
1352	return; /* all is well */	1738	return; /* all is well */
1353		1739
1354	ev_rt_now = ev_time ();	1740	ev_rt_now = ev_time ();
1355	mn_now = get_clock ();	1741	mn_now = get_clock ();
1356	now_floor = mn_now;	1742	now_floor = mn_now;
1357	}	1743	}
1358		1744
1359	# if EV_PERIODIC_ENABLE	1745	# if EV_PERIODIC_ENABLE
1360	periodics_reschedule (EV_A);	1746	periodics_reschedule (EV_A);
1361	# endif	1747	# endif
1362	/* no timer adjustment, as the monotonic clock doesn't jump */	1748	/* no timer adjustment, as the monotonic clock doesn't jump */
1363	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */	1749	/* timers_reschedule (EV_A_ rtmn_diff - odiff) */
1364	}
1365	}	1750	}
1366	else	1751	else
1367	#endif	1752	#endif
1368	{	1753	{
1369	ev_rt_now = ev_time ();	1754	ev_rt_now = ev_time ();
1370		1755
1371	if (expect_false (mn_now > ev_rt_now \|\| mn_now < ev_rt_now - MAX_BLOCKTIME - MIN_TIMEJUMP))	1756	if (expect_false (mn_now > ev_rt_now \|\| ev_rt_now > mn_now + max_block + MIN_TIMEJUMP))
1372	{	1757	{
1373	#if EV_PERIODIC_ENABLE	1758	#if EV_PERIODIC_ENABLE
1374	periodics_reschedule (EV_A);	1759	periodics_reschedule (EV_A);
1375	#endif	1760	#endif
1376	/* adjust timers. this is easy, as the offset is the same for all of them */	1761	/* adjust timers. this is easy, as the offset is the same for all of them */
1377	for (i = 0; i < timercnt; ++i)	1762	for (i = 0; i < timercnt; ++i)
		1763	{
		1764	ANHE *he = timers + i + HEAP0;
1378	((WT)timers [i])->at += ev_rt_now - mn_now;	1765	ANHE_w (*he)->at += ev_rt_now - mn_now;
		1766	ANHE_at_set (*he);
		1767	}
1379	}	1768	}
1380		1769
1381	mn_now = ev_rt_now;	1770	mn_now = ev_rt_now;
1382	}	1771	}
1383	}	1772	}
…		…
1397	static int loop_done;	1786	static int loop_done;
1398		1787
1399	void	1788	void
1400	ev_loop (EV_P_ int flags)	1789	ev_loop (EV_P_ int flags)
1401	{	1790	{
1402	loop_done = flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK)	1791	loop_done = EVUNLOOP_CANCEL;
1403	? EVUNLOOP_ONE
1404	: EVUNLOOP_CANCEL;
1405		1792
1406	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */	1793	call_pending (EV_A); /* in case we recurse, ensure ordering stays nice and clean */
1407		1794
1408	do	1795	do
1409	{	1796	{
…		…
1443	/* update fd-related kernel structures */	1830	/* update fd-related kernel structures */
1444	fd_reify (EV_A);	1831	fd_reify (EV_A);
1445		1832
1446	/* calculate blocking time */	1833	/* calculate blocking time */
1447	{	1834	{
1448	ev_tstamp block;	1835	ev_tstamp waittime = 0.;
		1836	ev_tstamp sleeptime = 0.;
1449		1837
1450	if (expect_false (flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt))	1838	if (expect_true (!(flags & EVLOOP_NONBLOCK \|\| idleall \|\| !activecnt)))
1451	block = 0.; /* do not block at all */
1452	else
1453	{	1839	{
1454	/* update time to cancel out callback processing overhead */	1840	/* update time to cancel out callback processing overhead */
1455	#if EV_USE_MONOTONIC
1456	if (expect_true (have_monotonic))
1457	time_update_monotonic (EV_A);	1841	time_update (EV_A_ 1e100);
1458	else
1459	#endif
1460	{
1461	ev_rt_now = ev_time ();
1462	mn_now = ev_rt_now;
1463	}
1464		1842
1465	block = MAX_BLOCKTIME;	1843	waittime = MAX_BLOCKTIME;
1466		1844
1467	if (timercnt)	1845	if (timercnt)
1468	{	1846	{
1469	ev_tstamp to = ((WT)timers [0])->at - mn_now + backend_fudge;	1847	ev_tstamp to = ANHE_at (timers [HEAP0]) - mn_now + backend_fudge;
1470	if (block > to) block = to;	1848	if (waittime > to) waittime = to;
1471	}	1849	}
1472		1850
1473	#if EV_PERIODIC_ENABLE	1851	#if EV_PERIODIC_ENABLE
1474	if (periodiccnt)	1852	if (periodiccnt)
1475	{	1853	{
1476	ev_tstamp to = ((WT)periodics [0])->at - ev_rt_now + backend_fudge;	1854	ev_tstamp to = ANHE_at (periodics [HEAP0]) - ev_rt_now + backend_fudge;
1477	if (block > to) block = to;	1855	if (waittime > to) waittime = to;
1478	}	1856	}
1479	#endif	1857	#endif
1480		1858
1481	if (expect_false (block < 0.)) block = 0.;	1859	if (expect_false (waittime < timeout_blocktime))
		1860	waittime = timeout_blocktime;
		1861
		1862	sleeptime = waittime - backend_fudge;
		1863
		1864	if (expect_true (sleeptime > io_blocktime))
		1865	sleeptime = io_blocktime;
		1866
		1867	if (sleeptime)
		1868	{
		1869	ev_sleep (sleeptime);
		1870	waittime -= sleeptime;
		1871	}
1482	}	1872	}
1483		1873
1484	++loop_count;	1874	++loop_count;
1485	backend_poll (EV_A_ block);	1875	backend_poll (EV_A_ waittime);
		1876
		1877	/* update ev_rt_now, do magic */
		1878	time_update (EV_A_ waittime + sleeptime);
1486	}	1879	}
1487
1488	/* update ev_rt_now, do magic */
1489	time_update (EV_A);
1490		1880
1491	/* queue pending timers and reschedule them */	1881	/* queue pending timers and reschedule them */
1492	timers_reify (EV_A); /* relative timers called last */	1882	timers_reify (EV_A); /* relative timers called last */
1493	#if EV_PERIODIC_ENABLE	1883	#if EV_PERIODIC_ENABLE
1494	periodics_reify (EV_A); /* absolute timers called first */	1884	periodics_reify (EV_A); /* absolute timers called first */
…		…
1502	/* queue check watchers, to be executed first */	1892	/* queue check watchers, to be executed first */
1503	if (expect_false (checkcnt))	1893	if (expect_false (checkcnt))
1504	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);	1894	queue_events (EV_A_ (W *)checks, checkcnt, EV_CHECK);
1505		1895
1506	call_pending (EV_A);	1896	call_pending (EV_A);
1507
1508	}	1897	}
1509	while (expect_true (activecnt && !loop_done));	1898	while (expect_true (
		1899	activecnt
		1900	&& !loop_done
		1901	&& !(flags & (EVLOOP_ONESHOT \| EVLOOP_NONBLOCK))
		1902	));
1510		1903
1511	if (loop_done == EVUNLOOP_ONE)	1904	if (loop_done == EVUNLOOP_ONE)
1512	loop_done = EVUNLOOP_CANCEL;	1905	loop_done = EVUNLOOP_CANCEL;
1513	}	1906	}
1514		1907
…		…
1605		1998
1606	assert (("ev_io_start called with negative fd", fd >= 0));	1999	assert (("ev_io_start called with negative fd", fd >= 0));
1607		2000
1608	ev_start (EV_A_ (W)w, 1);	2001	ev_start (EV_A_ (W)w, 1);
1609	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);	2002	array_needsize (ANFD, anfds, anfdmax, fd + 1, anfds_init);
1610	wlist_add ((WL *)&anfds[fd].head, (WL)w);	2003	wlist_add (&anfds[fd].head, (WL)w);
1611		2004
1612	fd_change (EV_A_ fd);	2005	fd_change (EV_A_ fd, w->events & EV_IOFDSET \| 1);
		2006	w->events &= ~EV_IOFDSET;
1613	}	2007	}
1614		2008
1615	void noinline	2009	void noinline
1616	ev_io_stop (EV_P_ ev_io *w)	2010	ev_io_stop (EV_P_ ev_io *w)
1617	{	2011	{
1618	clear_pending (EV_A_ (W)w);	2012	clear_pending (EV_A_ (W)w);
1619	if (expect_false (!ev_is_active (w)))	2013	if (expect_false (!ev_is_active (w)))
1620	return;	2014	return;
1621		2015
1622	assert (("ev_io_start called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));	2016	assert (("ev_io_stop called with illegal fd (must stay constant after start!)", w->fd >= 0 && w->fd < anfdmax));
1623		2017
1624	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);	2018	wlist_del (&anfds[w->fd].head, (WL)w);
1625	ev_stop (EV_A_ (W)w);	2019	ev_stop (EV_A_ (W)w);
1626		2020
1627	fd_change (EV_A_ w->fd);	2021	fd_change (EV_A_ w->fd, 1);
1628	}	2022	}
1629		2023
1630	void noinline	2024	void noinline
1631	ev_timer_start (EV_P_ ev_timer *w)	2025	ev_timer_start (EV_P_ ev_timer *w)
1632	{	2026	{
1633	if (expect_false (ev_is_active (w)))	2027	if (expect_false (ev_is_active (w)))
1634	return;	2028	return;
1635		2029
1636	((WT)w)->at += mn_now;	2030	ev_at (w) += mn_now;
1637		2031
1638	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));	2032	assert (("ev_timer_start called with negative timer repeat value", w->repeat >= 0.));
1639		2033
1640	ev_start (EV_A_ (W)w, ++timercnt);	2034	ev_start (EV_A_ (W)w, ++timercnt + HEAP0 - 1);
1641	array_needsize (ev_timer *, timers, timermax, timercnt, EMPTY2);	2035	array_needsize (ANHE, timers, timermax, ev_active (w) + 1, EMPTY2);
1642	timers [timercnt - 1] = w;	2036	ANHE_w (timers [ev_active (w)]) = (WT)w;
1643	upheap ((WT *)timers, timercnt - 1);	2037	ANHE_at_set (timers [ev_active (w)]);
		2038	upheap (timers, ev_active (w));
1644		2039
1645	/assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));/	2040	/assert (("internal timer heap corruption", timers [ev_active (w)] == (WT)w));/
1646	}	2041	}
1647		2042
1648	void noinline	2043	void noinline
1649	ev_timer_stop (EV_P_ ev_timer *w)	2044	ev_timer_stop (EV_P_ ev_timer *w)
1650	{	2045	{
1651	clear_pending (EV_A_ (W)w);	2046	clear_pending (EV_A_ (W)w);
1652	if (expect_false (!ev_is_active (w)))	2047	if (expect_false (!ev_is_active (w)))
1653	return;	2048	return;
1654		2049
1655	assert (("internal timer heap corruption", timers [((W)w)->active - 1] == w));
1656
1657	{	2050	{
1658	int active = ((W)w)->active;	2051	int active = ev_active (w);
1659		2052
		2053	assert (("internal timer heap corruption", ANHE_w (timers [active]) == (WT)w));
		2054
1660	if (expect_true (--active < --timercnt))	2055	if (expect_true (active < timercnt + HEAP0 - 1))
1661	{	2056	{
1662	timers [active] = timers [timercnt];	2057	timers [active] = timers [timercnt + HEAP0 - 1];
1663	adjustheap ((WT *)timers, timercnt, active);	2058	adjustheap (timers, timercnt, active);
1664	}	2059	}
		2060
		2061	--timercnt;
1665	}	2062	}
1666		2063
1667	((WT)w)->at -= mn_now;	2064	ev_at (w) -= mn_now;
1668		2065
1669	ev_stop (EV_A_ (W)w);	2066	ev_stop (EV_A_ (W)w);
1670	}	2067	}
1671		2068
1672	void noinline	2069	void noinline
…		…
1674	{	2071	{
1675	if (ev_is_active (w))	2072	if (ev_is_active (w))
1676	{	2073	{
1677	if (w->repeat)	2074	if (w->repeat)
1678	{	2075	{
1679	((WT)w)->at = mn_now + w->repeat;	2076	ev_at (w) = mn_now + w->repeat;
		2077	ANHE_at_set (timers [ev_active (w)]);
1680	adjustheap ((WT *)timers, timercnt, ((W)w)->active - 1);	2078	adjustheap (timers, timercnt, ev_active (w));
1681	}	2079	}
1682	else	2080	else
1683	ev_timer_stop (EV_A_ w);	2081	ev_timer_stop (EV_A_ w);
1684	}	2082	}
1685	else if (w->repeat)	2083	else if (w->repeat)
1686	{	2084	{
1687	w->at = w->repeat;	2085	ev_at (w) = w->repeat;
1688	ev_timer_start (EV_A_ w);	2086	ev_timer_start (EV_A_ w);
1689	}	2087	}
1690	}	2088	}
1691		2089
1692	#if EV_PERIODIC_ENABLE	2090	#if EV_PERIODIC_ENABLE
…		…
1695	{	2093	{
1696	if (expect_false (ev_is_active (w)))	2094	if (expect_false (ev_is_active (w)))
1697	return;	2095	return;
1698		2096
1699	if (w->reschedule_cb)	2097	if (w->reschedule_cb)
1700	((WT)w)->at = w->reschedule_cb (w, ev_rt_now);	2098	ev_at (w) = w->reschedule_cb (w, ev_rt_now);
1701	else if (w->interval)	2099	else if (w->interval)
1702	{	2100	{
1703	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));	2101	assert (("ev_periodic_start called with negative interval value", w->interval >= 0.));
1704	/* this formula differs from the one in periodic_reify because we do not always round up */	2102	/* this formula differs from the one in periodic_reify because we do not always round up */
1705	((WT)w)->at = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;	2103	ev_at (w) = w->offset + ceil ((ev_rt_now - w->offset) / w->interval) * w->interval;
1706	}	2104	}
1707	else	2105	else
1708	((WT)w)->at = w->offset;	2106	ev_at (w) = w->offset;
1709		2107
1710	ev_start (EV_A_ (W)w, ++periodiccnt);	2108	ev_start (EV_A_ (W)w, ++periodiccnt + HEAP0 - 1);
1711	array_needsize (ev_periodic *, periodics, periodicmax, periodiccnt, EMPTY2);	2109	array_needsize (ANHE, periodics, periodicmax, ev_active (w) + 1, EMPTY2);
1712	periodics [periodiccnt - 1] = w;	2110	ANHE_w (periodics [ev_active (w)]) = (WT)w;
1713	upheap ((WT *)periodics, periodiccnt - 1);	2111	ANHE_at_set (periodics [ev_active (w)]);
		2112	upheap (periodics, ev_active (w));
1714		2113
1715	/assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));/	2114	/assert (("internal periodic heap corruption", ANHE_w (periodics [ev_active (w)]) == (WT)w));/
1716	}	2115	}
1717		2116
1718	void noinline	2117	void noinline
1719	ev_periodic_stop (EV_P_ ev_periodic *w)	2118	ev_periodic_stop (EV_P_ ev_periodic *w)
1720	{	2119	{
1721	clear_pending (EV_A_ (W)w);	2120	clear_pending (EV_A_ (W)w);
1722	if (expect_false (!ev_is_active (w)))	2121	if (expect_false (!ev_is_active (w)))
1723	return;	2122	return;
1724		2123
1725	assert (("internal periodic heap corruption", periodics [((W)w)->active - 1] == w));
1726
1727	{	2124	{
1728	int active = ((W)w)->active;	2125	int active = ev_active (w);
1729		2126
		2127	assert (("internal periodic heap corruption", ANHE_w (periodics [active]) == (WT)w));
		2128
1730	if (expect_true (--active < --periodiccnt))	2129	if (expect_true (active < periodiccnt + HEAP0 - 1))
1731	{	2130	{
1732	periodics [active] = periodics [periodiccnt];	2131	periodics [active] = periodics [periodiccnt + HEAP0 - 1];
1733	adjustheap ((WT *)periodics, periodiccnt, active);	2132	adjustheap (periodics, periodiccnt, active);
1734	}	2133	}
		2134
		2135	--periodiccnt;
1735	}	2136	}
1736		2137
1737	ev_stop (EV_A_ (W)w);	2138	ev_stop (EV_A_ (W)w);
1738	}	2139	}
1739		2140
…		…
1759	if (expect_false (ev_is_active (w)))	2160	if (expect_false (ev_is_active (w)))
1760	return;	2161	return;
1761		2162
1762	assert (("ev_signal_start called with illegal signal number", w->signum > 0));	2163	assert (("ev_signal_start called with illegal signal number", w->signum > 0));
1763		2164
		2165	evpipe_init (EV_A);
		2166
		2167	{
		2168	#ifndef _WIN32
		2169	sigset_t full, prev;
		2170	sigfillset (&full);
		2171	sigprocmask (SIG_SETMASK, &full, &prev);
		2172	#endif
		2173
		2174	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
		2175
		2176	#ifndef _WIN32
		2177	sigprocmask (SIG_SETMASK, &prev, 0);
		2178	#endif
		2179	}
		2180
1764	ev_start (EV_A_ (W)w, 1);	2181	ev_start (EV_A_ (W)w, 1);
1765	array_needsize (ANSIG, signals, signalmax, w->signum, signals_init);
1766	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);	2182	wlist_add (&signals [w->signum - 1].head, (WL)w);
1767		2183
1768	if (!((WL)w)->next)	2184	if (!((WL)w)->next)
1769	{	2185	{
1770	#if _WIN32	2186	#if _WIN32
1771	signal (w->signum, sighandler);	2187	signal (w->signum, ev_sighandler);
1772	#else	2188	#else
1773	struct sigaction sa;	2189	struct sigaction sa;
1774	sa.sa_handler = sighandler;	2190	sa.sa_handler = ev_sighandler;
1775	sigfillset (&sa.sa_mask);	2191	sigfillset (&sa.sa_mask);
1776	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */	2192	sa.sa_flags = SA_RESTART; /* if restarting works we save one iteration */
1777	sigaction (w->signum, &sa, 0);	2193	sigaction (w->signum, &sa, 0);
1778	#endif	2194	#endif
1779	}	2195	}
…		…
1784	{	2200	{
1785	clear_pending (EV_A_ (W)w);	2201	clear_pending (EV_A_ (W)w);
1786	if (expect_false (!ev_is_active (w)))	2202	if (expect_false (!ev_is_active (w)))
1787	return;	2203	return;
1788		2204
1789	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);	2205	wlist_del (&signals [w->signum - 1].head, (WL)w);
1790	ev_stop (EV_A_ (W)w);	2206	ev_stop (EV_A_ (W)w);
1791		2207
1792	if (!signals [w->signum - 1].head)	2208	if (!signals [w->signum - 1].head)
1793	signal (w->signum, SIG_DFL);	2209	signal (w->signum, SIG_DFL);
1794	}	2210	}
…		…
1801	#endif	2217	#endif
1802	if (expect_false (ev_is_active (w)))	2218	if (expect_false (ev_is_active (w)))
1803	return;	2219	return;
1804		2220
1805	ev_start (EV_A_ (W)w, 1);	2221	ev_start (EV_A_ (W)w, 1);
1806	wlist_add ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2222	wlist_add (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1807	}	2223	}
1808		2224
1809	void	2225	void
1810	ev_child_stop (EV_P_ ev_child *w)	2226	ev_child_stop (EV_P_ ev_child *w)
1811	{	2227	{
1812	clear_pending (EV_A_ (W)w);	2228	clear_pending (EV_A_ (W)w);
1813	if (expect_false (!ev_is_active (w)))	2229	if (expect_false (!ev_is_active (w)))
1814	return;	2230	return;
1815		2231
1816	wlist_del ((WL *)&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);	2232	wlist_del (&childs [w->pid & (EV_PID_HASHSIZE - 1)], (WL)w);
1817	ev_stop (EV_A_ (W)w);	2233	ev_stop (EV_A_ (W)w);
1818	}	2234	}
1819		2235
1820	#if EV_STAT_ENABLE	2236	#if EV_STAT_ENABLE
1821		2237
…		…
1840	if (w->wd < 0)	2256	if (w->wd < 0)
1841	{	2257	{
1842	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */	2258	ev_timer_start (EV_A_ &w->timer); /* this is not race-free, so we still need to recheck periodically */
1843		2259
1844	/* monitor some parent directory for speedup hints */	2260	/* monitor some parent directory for speedup hints */
		2261	/* note that exceeding the hardcoded limit is not a correctness issue, */
		2262	/* but an efficiency issue only */
1845	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)	2263	if ((errno == ENOENT \|\| errno == EACCES) && strlen (w->path) < 4096)
1846	{	2264	{
1847	char path [4096];	2265	char path [4096];
1848	strcpy (path, w->path);	2266	strcpy (path, w->path);
1849		2267
…		…
2094	clear_pending (EV_A_ (W)w);	2512	clear_pending (EV_A_ (W)w);
2095	if (expect_false (!ev_is_active (w)))	2513	if (expect_false (!ev_is_active (w)))
2096	return;	2514	return;
2097		2515
2098	{	2516	{
2099	int active = ((W)w)->active;	2517	int active = ev_active (w);
2100		2518
2101	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];	2519	idles [ABSPRI (w)][active - 1] = idles [ABSPRI (w)][--idlecnt [ABSPRI (w)]];
2102	((W)idles [ABSPRI (w)][active - 1])->active = active;	2520	ev_active (idles [ABSPRI (w)][active - 1]) = active;
2103		2521
2104	ev_stop (EV_A_ (W)w);	2522	ev_stop (EV_A_ (W)w);
2105	--idleall;	2523	--idleall;
2106	}	2524	}
2107	}	2525	}
…		…
2124	clear_pending (EV_A_ (W)w);	2542	clear_pending (EV_A_ (W)w);
2125	if (expect_false (!ev_is_active (w)))	2543	if (expect_false (!ev_is_active (w)))
2126	return;	2544	return;
2127		2545
2128	{	2546	{
2129	int active = ((W)w)->active;	2547	int active = ev_active (w);
		2548
2130	prepares [active - 1] = prepares [--preparecnt];	2549	prepares [active - 1] = prepares [--preparecnt];
2131	((W)prepares [active - 1])->active = active;	2550	ev_active (prepares [active - 1]) = active;
2132	}	2551	}
2133		2552
2134	ev_stop (EV_A_ (W)w);	2553	ev_stop (EV_A_ (W)w);
2135	}	2554	}
2136		2555
…		…
2151	clear_pending (EV_A_ (W)w);	2570	clear_pending (EV_A_ (W)w);
2152	if (expect_false (!ev_is_active (w)))	2571	if (expect_false (!ev_is_active (w)))
2153	return;	2572	return;
2154		2573
2155	{	2574	{
2156	int active = ((W)w)->active;	2575	int active = ev_active (w);
		2576
2157	checks [active - 1] = checks [--checkcnt];	2577	checks [active - 1] = checks [--checkcnt];
2158	((W)checks [active - 1])->active = active;	2578	ev_active (checks [active - 1]) = active;
2159	}	2579	}
2160		2580
2161	ev_stop (EV_A_ (W)w);	2581	ev_stop (EV_A_ (W)w);
2162	}	2582	}
2163		2583
2164	#if EV_EMBED_ENABLE	2584	#if EV_EMBED_ENABLE
2165	void noinline	2585	void noinline
2166	ev_embed_sweep (EV_P_ ev_embed *w)	2586	ev_embed_sweep (EV_P_ ev_embed *w)
2167	{	2587	{
2168	ev_loop (w->loop, EVLOOP_NONBLOCK);	2588	ev_loop (w->other, EVLOOP_NONBLOCK);
2169	}	2589	}
2170		2590
2171	static void	2591	static void
2172	embed_cb (EV_P_ ev_io *io, int revents)	2592	embed_io_cb (EV_P_ ev_io *io, int revents)
2173	{	2593	{
2174	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));	2594	ev_embed w = (ev_embed )(((char *)io) - offsetof (ev_embed, io));
2175		2595
2176	if (ev_cb (w))	2596	if (ev_cb (w))
2177	ev_feed_event (EV_A_ (W)w, EV_EMBED);	2597	ev_feed_event (EV_A_ (W)w, EV_EMBED);
2178	else	2598	else
2179	ev_embed_sweep (loop, w);	2599	ev_loop (w->other, EVLOOP_NONBLOCK);
2180	}	2600	}
		2601
		2602	static void
		2603	embed_prepare_cb (EV_P_ ev_prepare *prepare, int revents)
		2604	{
		2605	ev_embed w = (ev_embed )(((char *)prepare) - offsetof (ev_embed, prepare));
		2606
		2607	{
		2608	struct ev_loop *loop = w->other;
		2609
		2610	while (fdchangecnt)
		2611	{
		2612	fd_reify (EV_A);
		2613	ev_loop (EV_A_ EVLOOP_NONBLOCK);
		2614	}
		2615	}
		2616	}
		2617
		2618	#if 0
		2619	static void
		2620	embed_idle_cb (EV_P_ ev_idle *idle, int revents)
		2621	{
		2622	ev_idle_stop (EV_A_ idle);
		2623	}
		2624	#endif
2181		2625
2182	void	2626	void
2183	ev_embed_start (EV_P_ ev_embed *w)	2627	ev_embed_start (EV_P_ ev_embed *w)
2184	{	2628	{
2185	if (expect_false (ev_is_active (w)))	2629	if (expect_false (ev_is_active (w)))
2186	return;	2630	return;
2187		2631
2188	{	2632	{
2189	struct ev_loop *loop = w->loop;	2633	struct ev_loop *loop = w->other;
2190	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));	2634	assert (("loop to be embedded is not embeddable", backend & ev_embeddable_backends ()));
2191	ev_io_init (&w->io, embed_cb, backend_fd, EV_READ);	2635	ev_io_init (&w->io, embed_io_cb, backend_fd, EV_READ);
2192	}	2636	}
2193		2637
2194	ev_set_priority (&w->io, ev_priority (w));	2638	ev_set_priority (&w->io, ev_priority (w));
2195	ev_io_start (EV_A_ &w->io);	2639	ev_io_start (EV_A_ &w->io);
		2640
		2641	ev_prepare_init (&w->prepare, embed_prepare_cb);
		2642	ev_set_priority (&w->prepare, EV_MINPRI);
		2643	ev_prepare_start (EV_A_ &w->prepare);
		2644
		2645	/ev_idle_init (&w->idle, e,bed_idle_cb);/
2196		2646
2197	ev_start (EV_A_ (W)w, 1);	2647	ev_start (EV_A_ (W)w, 1);
2198	}	2648	}
2199		2649
2200	void	2650	void
…		…
2203	clear_pending (EV_A_ (W)w);	2653	clear_pending (EV_A_ (W)w);
2204	if (expect_false (!ev_is_active (w)))	2654	if (expect_false (!ev_is_active (w)))
2205	return;	2655	return;
2206		2656
2207	ev_io_stop (EV_A_ &w->io);	2657	ev_io_stop (EV_A_ &w->io);
		2658	ev_prepare_stop (EV_A_ &w->prepare);
2208		2659
2209	ev_stop (EV_A_ (W)w);	2660	ev_stop (EV_A_ (W)w);
2210	}	2661	}
2211	#endif	2662	#endif
2212		2663
…		…
2228	clear_pending (EV_A_ (W)w);	2679	clear_pending (EV_A_ (W)w);
2229	if (expect_false (!ev_is_active (w)))	2680	if (expect_false (!ev_is_active (w)))
2230	return;	2681	return;
2231		2682
2232	{	2683	{
2233	int active = ((W)w)->active;	2684	int active = ev_active (w);
		2685
2234	forks [active - 1] = forks [--forkcnt];	2686	forks [active - 1] = forks [--forkcnt];
2235	((W)forks [active - 1])->active = active;	2687	ev_active (forks [active - 1]) = active;
2236	}	2688	}
2237		2689
2238	ev_stop (EV_A_ (W)w);	2690	ev_stop (EV_A_ (W)w);
		2691	}
		2692	#endif
		2693
		2694	#if EV_ASYNC_ENABLE
		2695	void
		2696	ev_async_start (EV_P_ ev_async *w)
		2697	{
		2698	if (expect_false (ev_is_active (w)))
		2699	return;
		2700
		2701	evpipe_init (EV_A);
		2702
		2703	ev_start (EV_A_ (W)w, ++asynccnt);
		2704	array_needsize (ev_async *, asyncs, asyncmax, asynccnt, EMPTY2);
		2705	asyncs [asynccnt - 1] = w;
		2706	}
		2707
		2708	void
		2709	ev_async_stop (EV_P_ ev_async *w)
		2710	{
		2711	clear_pending (EV_A_ (W)w);
		2712	if (expect_false (!ev_is_active (w)))
		2713	return;
		2714
		2715	{
		2716	int active = ev_active (w);
		2717
		2718	asyncs [active - 1] = asyncs [--asynccnt];
		2719	ev_active (asyncs [active - 1]) = active;
		2720	}
		2721
		2722	ev_stop (EV_A_ (W)w);
		2723	}
		2724
		2725	void
		2726	ev_async_send (EV_P_ ev_async *w)
		2727	{
		2728	w->sent = 1;
		2729	evpipe_write (EV_A_ &gotasync);
2239	}	2730	}
2240	#endif	2731	#endif
2241		2732
2242	/*****************************************************************************/	2733	/*****************************************************************************/
2243		2734
…		…
2301	ev_timer_set (&once->to, timeout, 0.);	2792	ev_timer_set (&once->to, timeout, 0.);
2302	ev_timer_start (EV_A_ &once->to);	2793	ev_timer_start (EV_A_ &once->to);
2303	}	2794	}
2304	}	2795	}
2305		2796
		2797	#if EV_MULTIPLICITY
		2798	#include "ev_wrap.h"
		2799	#endif
		2800
2306	#ifdef __cplusplus	2801	#ifdef __cplusplus
2307	}	2802	}
2308	#endif	2803	#endif
2309		2804

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Comparing libev/ev.c (file contents): Revision 1.177 by root, Tue Dec 11 15:06:50 2007 UTC vs. Revision 1.246 by root, Wed May 21 12:51:38 2008 UTC

Diff Legend

Comparing libev/ev.c (file contents):
Revision 1.177 by root, Tue Dec 11 15:06:50 2007 UTC vs.
Revision 1.246 by root, Wed May 21 12:51:38 2008 UTC