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using System;
using System.Runtime.InteropServices;
namespace Ryujinx.HLE
{
class DeviceMemory : IDisposable
{
public const long RamSize = 4L * 1024 * 1024 * 1024;
public IntPtr RamPointer { get; private set; }
private unsafe byte* _ramPtr;
public unsafe DeviceMemory()
{
RamPointer = Marshal.AllocHGlobal(new IntPtr(RamSize));
_ramPtr = (byte*)RamPointer;
}
public sbyte ReadSByte(long position)
{
return (sbyte)ReadByte(position);
}
public short ReadInt16(long position)
{
return (short)ReadUInt16(position);
}
public int ReadInt32(long position)
{
return (int)ReadUInt32(position);
}
public long ReadInt64(long position)
{
return (long)ReadUInt64(position);
}
public unsafe byte ReadByte(long position)
{
return *(_ramPtr + position);
}
public unsafe ushort ReadUInt16(long position)
{
return *((ushort*)(_ramPtr + position));
}
public unsafe uint ReadUInt32(long position)
{
return *((uint*)(_ramPtr + position));
}
public unsafe ulong ReadUInt64(long position)
{
return *((ulong*)(_ramPtr + position));
}
public void WriteSByte(long position, sbyte value)
{
WriteByte(position, (byte)value);
}
public void WriteInt16(long position, short value)
{
WriteUInt16(position, (ushort)value);
}
public void WriteInt32(long position, int value)
{
WriteUInt32(position, (uint)value);
}
public void WriteInt64(long position, long value)
{
WriteUInt64(position, (ulong)value);
}
public unsafe void WriteByte(long position, byte value)
{
*(_ramPtr + position) = value;
}
public unsafe void WriteUInt16(long position, ushort value)
{
*((ushort*)(_ramPtr + position)) = value;
}
public unsafe void WriteUInt32(long position, uint value)
{
*((uint*)(_ramPtr + position)) = value;
}
public unsafe void WriteUInt64(long position, ulong value)
{
*((ulong*)(_ramPtr + position)) = value;
}
public void FillWithZeros(long position, int size)
{
int size8 = size & ~(8 - 1);
for (int offs = 0; offs < size8; offs += 8)
{
WriteInt64(position + offs, 0);
}
for (int offs = size8; offs < (size - size8); offs++)
{
WriteByte(position + offs, 0);
}
}
public void Dispose()
{
Dispose(true);
}
protected virtual void Dispose(bool disposing)
{
Marshal.FreeHGlobal(RamPointer);
}
}
}
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