enderalse/source/fs.dll/common/IFIFO.h

28 lines
857 B
C
Raw Normal View History

2021-10-06 00:45:46 +00:00
#pragma once
class IFIFO
{
public:
IFIFO(UInt32 length = 0);
virtual ~IFIFO();
virtual bool Push(UInt8 * buf, UInt32 length);
virtual bool Pop(UInt8 * buf, UInt32 length);
virtual bool Peek(UInt8 * buf, UInt32 length);
virtual void Clear(void);
UInt32 GetBufferSize(void) { return fifoBufSize; }
UInt32 GetBufferRemain(void) { return fifoBufSize - fifoDataLength; }
UInt32 GetDataLength(void) { return fifoDataLength; }
private:
UInt32 ToRawOffset(UInt32 in) { return in % fifoBufSize; }
UInt32 ToDataOffset(UInt32 in) { return ToRawOffset(fifoBase + in); }
UInt32 GetWriteOffset(void) { return ToDataOffset(fifoDataLength); }
UInt8 * fifoBuf;
UInt32 fifoBufSize; // size of the buffer (in bytes)
UInt32 fifoBase; // pointer to the beginning of the data block
UInt32 fifoDataLength; // size of the data block
};