private void UpdateBuffer()
{
using (var temp = new UnmanagedBlock(Marshal.SizeOf(mType)))
{
Marshal.StructureToPtr(mData, temp, true);
mBuffer.Write(temp, 0, temp.Size);
}
}
public void Write(IntPtr source, int writeOffset, long bytesToWrite)
{
if (!mWritable)
{
throw new AccessViolationException("The underlying memory block does not allow writing.");
}
UnmanagedBlock.Copy(source, Pointer, 0, writeOffset, bytesToWrite);
}
public void Read(IntPtr target, int readOffset, long bytesToRead)
{
if (!mReadable)
{
throw new AccessViolationException("The underlying memory block does not allow reading.");
}
UnmanagedBlock.Copy(Pointer, target, readOffset, 0, bytesToRead);
}
public override unsafe void Write(byte[] buffer, int offset, int count)
{
fixed(void *pBuffer = buffer)
{
var bufferPointer = new IntPtr(pBuffer);
var targetPointer = mMemory.GetPointer();
var length = Math.Min(count, mMemory.Size - mCurrentOffset);
UnmanagedBlock.Copy(bufferPointer, targetPointer, offset, (int)mCurrentOffset, length);
mCurrentOffset += length;
}
}
public override unsafe int Read(byte[] buffer, int offset, int count)
{
fixed(void *pBuffer = buffer)
{
var bufferPointer = new IntPtr(pBuffer);
var sourcePointer = mMemory.GetPointer();
var length = Math.Min(count, mMemory.Size - mCurrentOffset);
UnmanagedBlock.Copy(sourcePointer, bufferPointer, (int)mCurrentOffset, offset, length);
mCurrentOffset += length;
return((int)length);
}
}
public void Write(IntPtr source, int writeOffset, long bytesToWrite)
{
var buffer = GetBuffer();
DataBox mappedResource = null;
try
{
mappedResource = Device.ImmediateContext.MapSubresource(buffer, MapMode.WriteDiscard, MapFlags.None);
UnmanagedBlock.Copy(source, mappedResource.Data.DataPointer, 0, writeOffset, bytesToWrite);
}
finally
{
if (mappedResource != null)
{
Device.ImmediateContext.UnmapSubresource(buffer, 0);
}
}
}
public static void CopyTo <T>(this IReadableMemory memory, [NotNull] T[] targetArray) where T : struct
{
if (targetArray == null)
{
throw new ArgumentNullException(nameof(targetArray));
}
var targetArrayHandle = default(GCHandle);
try
{
targetArrayHandle = GCHandle.Alloc(targetArray, GCHandleType.Pinned);
UnmanagedBlock.Copy(memory.GetPointer(), targetArrayHandle.AddrOfPinnedObject(), 0, 0, memory.Size);
}
finally
{
if (targetArrayHandle.IsAllocated)
{
targetArrayHandle.Free();
}
}
}
public static void FromArray <T>(this IWritableMemory memory, [NotNull] T[] sourceArray) where T : struct
{
if (sourceArray == null)
{
throw new ArgumentNullException(nameof(sourceArray));
}
var sourceArrayHandle = default(GCHandle);
try
{
sourceArrayHandle = GCHandle.Alloc(sourceArray, GCHandleType.Pinned);
UnmanagedBlock.Copy(sourceArrayHandle.AddrOfPinnedObject(), memory.GetPointer(), 0, 0, memory.Size);
}
finally
{
if (sourceArrayHandle.IsAllocated)
{
sourceArrayHandle.Free();
}
}
}
public void Read(IntPtr target, int readOffset, long bytesToRead) => UnmanagedBlock.Copy(Pointer, target, readOffset, 0, bytesToRead);
public void Write(IntPtr source, int writeOffset, long bytesToWrite) => UnmanagedBlock.Copy(source, Pointer, 0, writeOffset, bytesToWrite);
