MICache

Definition

#include <nitro/mi.h>


typedef struct MICachePage
{
    struct MICachePage *next;
    u32                 offset;
    u8                 *buffer;
}
MICachePage;

typedef struct MICache
{
/* private: */
    u32             pagewidth;
    MICachePage    *valid;
    MICachePage    *invalid;
    MICachePage    *loading;
    int             valid_total;
    int             invalid_total;
    int             loading_total;
}
MICache;

Description

This structure is for implementing a memory cache for the MIDevice structure.

This feature is a utility that enables efficient read access to devices. The structure has the following features:

• This improves the processing efficiency of the device control codes that perform semi-local random access.
  Previously loaded data is stored in units of pages, so when repeatedly referencing a limited range of data, the device is only accessed once.
• It allows you to write flexible asynchronous code that is both environment- and device-independent.
  Access to the cache and the actual load process are provided in fairly simple formats so you can implement an unfettered wait-for-completion routine tailored to the operations of your application.

See Also

MI_InitCache, MI_ReadCache, MI_LoadCache, MI_IsCacheLoading
MIDevice

Revision History

2007/05/16 Initial version.

CONFIDENTIAL