ExternalMemoryBlockProvider.cs

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using System.IO;
 
namespace System.Reflection.Internal;
 
internal sealed class ExternalMemoryBlockProvider : MemoryBlockProvider
{
    private unsafe byte* _memory;
 
    private int _size;
 
    public override int Size => _size;
 
    public unsafe byte* Pointer => _memory;
 
    public unsafe ExternalMemoryBlockProvider(byte* memory, int size)
    {
        _memory = memory;
        _size = size;
    }
 
    protected unsafe override AbstractMemoryBlock GetMemoryBlockImpl(int start, int size)
    {
        return new ExternalMemoryBlock(this, _memory + start, size);
    }
 
    public unsafe override Stream GetStream(out StreamConstraints constraints)
    {
        constraints = new StreamConstraints(null, 0L, _size);
        return new ReadOnlyUnmanagedMemoryStream(_memory, _size);
    }
 
    protected unsafe override void Dispose(bool disposing)
    {
        _memory = null;
        _size = 0;
    }
}