bufcache.h

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#ifndef __SYS_BUFCACHE_H__
#define __SYS_BUFCACHE_H__
 
#include <sys/queue.h>
 
typedef struct BufCacheEntry {
    Disk                                *disk;
    uint64_t                            diskOffset;
    uint64_t                            refCount;
    void                                *buffer;
    TAILQ_ENTRY(BufCacheEntry)          htEntry;
    TAILQ_ENTRY(BufCacheEntry)          lruEntry;
} BufCacheEntry;
 
void BufCache_Init();
int BufCache_Alloc(Disk *disk, uint64_t diskOffset, BufCacheEntry **entry);
void BufCache_Release(BufCacheEntry *entry);
int BufCache_Read(Disk *disk, uint64_t diskOffset, BufCacheEntry **entry);
int BufCache_Write(BufCacheEntry *entry);
 
#endif /* __SYS_BUFCACHE_H__ */