public static MemoryBuffer <T, ArrayView2D <T, Stride2DDenseX> > Allocate2DPitchedX <T>(
this Accelerator a,
DimTuple2 extent)
where T : unmanaged
{
// Limitation: Since the underlying storage for our custom ArrayViews is well-typed, can only add padding
// in increments of sizeof(T) bytes. This limitation could be lifted within this sketch with some unsafe
// code that always used a backing store of type <byte> and casted pointers on every access.
long unpitchedBytes;
unsafe
{
if (sizeof(T) > 128 || 128 % sizeof(T) != 0)
{
throw new ArgumentException($"Cannot perform pitched allocation for {nameof(T)}");
}
unpitchedBytes = extent.X * sizeof(T);
}
var pitchedBytes = ((unpitchedBytes - 1) / 128 + 1) * 128;
var pitchedExtentX = pitchedBytes / 128;
var storage = a.Allocate <T>(pitchedExtentX * extent.Y);
var rootView = new ArrayView2D <T, Stride2DDenseX>(storage, extent, new Stride2DDenseX(pitchedExtentX));
return(new MemoryBuffer <T, ArrayView2D <T, Stride2DDenseX> >(storage, rootView));
}
public static MemoryBuffer <T, ArrayView2D <T, Stride2DDenseY> > Allocate2DDenseY <T>(
this Accelerator a,
DimTuple2 extent)
where T : unmanaged
{
var storage = a.Allocate <T>(extent.X * extent.Y);
var rootView = new ArrayView2D <T, Stride2DDenseY>(storage, extent, new Stride2DDenseY(extent.X));
return(new MemoryBuffer <T, ArrayView2D <T, Stride2DDenseY> >(storage, rootView));
}