public AlignedArray(byte[] buffer, int alignment, params int[] lengths)
{
_buffer = buffer;
_alignment = alignment;
_length = Utils.GetTotalSize(lengths);
_lengths = lengths;
if (_length > buffer.Length / Marshal.SizeOf <T>())
{
throw new ArgumentException($"Buffer is to small to hold array of size {nameof(lengths)}", nameof(buffer));
}
_pin = PinnedGCHandle.Pin(buffer);
long value = _pin.Pointer.ToInt64();
int offset = alignment - (int)(value % alignment);
_alignedPtr = new IntPtr(value + offset);
int maxLength = (_buffer.Length - offset) / Marshal.SizeOf <T>();
if (_length > maxLength)
{
_pin.Free();
throw new ArgumentException($"Buffer is to small to hold array of size {nameof(lengths)}", nameof(buffer));
}
}
public PinnedArray(Array array)
{
if (array.GetType().GetElementType() != typeof(T))
{
throw new ArgumentException($"Must have elements of type {typeof(T).FullName}.", nameof(array));
}
_buffer = array;
_pin = PinnedGCHandle.Pin(_buffer);
}