pythonnet/src/runtime/Native/NativeTypeSpec.cs at master · generalloki/pythonnet · GitHub

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using System;

using System.Runtime.InteropServices;

using System.Text;

namespace Python.Runtime.Native

{

[StructLayout(LayoutKind.Sequential)]

struct NativeTypeSpec : IDisposable

{

public readonly StrPtr Name;

public readonly int BasicSize;

public readonly int ItemSize;

public readonly int Flags;

public IntPtr Slots;

public NativeTypeSpec(TypeSpec spec)

{

if (spec is null) throw new ArgumentNullException(nameof(spec));

this.Name = new StrPtr(spec.Name);

this.BasicSize = spec.BasicSize;

this.ItemSize = spec.ItemSize;

this.Flags = (int)spec.Flags;

unsafe

{

int slotsBytes = checked((spec.Slots.Count + 1) * Marshal.SizeOf<TypeSpec.Slot>());

var slots = (TypeSpec.Slot*)Marshal.AllocHGlobal(slotsBytes);

for (int slotIndex = 0; slotIndex < spec.Slots.Count; slotIndex++)

slots[slotIndex] = spec.Slots[slotIndex];

slots[spec.Slots.Count] = default;

this.Slots = (IntPtr)slots;

}

public void Dispose()

{

// we have to leak the name

// this.Name.Dispose();

Marshal.FreeHGlobal(this.Slots);

this.Slots = IntPtr.Zero;

}