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/* This program is free software; you can redistribute it and/or modify
* it under the terms of version 3 or later of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*
* cache.h
*
* by Gary Wong, 1997-2000
* $Id: cache.h,v 1.12 2007/12/18 21:48:07 Superfly_Jon Exp $
*/
#ifndef _CACHE_H_
#define _CACHE_H_
#include <stdlib.h>
#define CACHE_STATS 1 /* Calculate simple cache stats */
typedef struct _cacheNode {
unsigned char auchKey[10];
int nEvalContext;
float ar[7 /*NUM_ROLLOUT_OUTPUTS*/];
} cacheNode;
/* name used in eval.c */
typedef cacheNode evalcache;
typedef struct _cache
{
cacheNode* m;
int *locks;
unsigned int size;
unsigned long hashMask;
#if CACHE_STATS
unsigned int nAdds;
unsigned int cLookup;
unsigned int cHit;
#endif
} evalCache;
/* Cache size will be adjusted to a power of 2 */
int CacheCreate(evalCache* pc, unsigned int size);
int CacheResize(evalCache *pc, unsigned int cNew);
#define CACHEHIT ((unsigned int)-1)
/* returns a value which is passed to CacheAdd (if a miss) */
unsigned int CacheLookup(evalCache* pc, const cacheNode* e, float *arOut, float *arCubeful);
void CacheAdd(evalCache* pc, const cacheNode* e, unsigned long l);
void CacheAddNoKey(evalCache* pc, const cacheNode* e);
void CacheFlush(const evalCache* pc);
void CacheDestroy(const evalCache* pc);
void CacheStats(const evalCache* pc, unsigned int* pcLookup, unsigned int* pcHit, unsigned int* pcUsed);
#endif
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