View difference between Paste ID: iRsxt4cu and

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+/*
 The cache needs to be able to provide the following operating modes:
 - read sector(s) to an already allocated buffer
   NOTE: we can provide an hint to cache whether the sectors should be cached or not if it's not already in the cache
 - write sectors(s) from an already filled buffer
   NOTE: same remark
 - read a sector and lock a buffer to it
 - flag a locked sector as dirty
 - clean a locked sector (write it back if needed)
 - unlock a sector (maybe with a flag if it should be cleaned or not)
 */
 
 struct sectorcache_entry
 {
     bool valid;
     bool free;
     int locks;
     bool exclusive;
     bool dirty;
     unsigned long sector;
 };
 
 struct sectorcache_entry[SECTORCACHE_SIZE];
 unsigned char sectorcache_buffer[SECTORCACHE_SIZE][SECTOR_SIZE];
 
 void sectorcache_init(void);
 int sectorcache_readthrough(IF_MD2(int drive,) unsigned long start, int count, void* buf, bool keepincache);
 int sectorcache_writethrough(IF_MD2(int drive,) unsigned long start, int count, const void* buf, bool keepincache);
 int sectorcache_lock(IF_MD2(int drive,) unsigned long sector, struct sectorcache_entry** handle, bool exclusive);
 int sectorcache_unlock(struct sectorcache_entry** handle, bool clean, bool keepincache);
 int sectorcache_markdirty(struct sectorcache_entry* handle);
 int sectorcache_clean(struct sectorcache_entry* handle);
 int sectorcache_clean_all(void);