ReadCore()

unsafe int System.IO.UnmanagedMemoryStream.ReadCore ( Span< byte > buffer )

inlinepackageinherited

Definition at line 311 of file UnmanagedMemoryStream.cs.

    {
        EnsureNotClosed();
        EnsureReadable();
        long num = Interlocked.Read(ref _position);
        long num2 = Interlocked.Read(ref _length);
        long num3 = Math.Min(num2 - num, buffer.Length);
        if (num3 <= 0)
        {
            return 0;
        }
        int num4 = (int)num3;
        if (num4 < 0)
        {
            return 0;
        }
        if (_buffer != null)
        {
            byte* pointer = null;
            try
            {
                _buffer.AcquirePointer(ref pointer);
                Buffer.Memmove(ref MemoryMarshal.GetReference(buffer), ref (pointer + num)[_offset], (nuint)num4);
            }
            finally
            {
                if (pointer != null)
                {
                    _buffer.ReleasePointer();
                }
            }
        }
        else
        {
            Buffer.Memmove(ref MemoryMarshal.GetReference(buffer), ref _mem[num], (nuint)num4);
        }
        Interlocked.Exchange(ref _position, num + num3);
        return num4;
    }

References System.IO.UnmanagedMemoryStream._buffer, System.IO.UnmanagedMemoryStream._length, System.IO.UnmanagedMemoryStream._mem, System.IO.UnmanagedMemoryStream._offset, System.IO.UnmanagedMemoryStream._position, System.Runtime.InteropServices.SafeBuffer.AcquirePointer(), System.buffer, System.IO.UnmanagedMemoryStream.EnsureNotClosed(), System.IO.UnmanagedMemoryStream.EnsureReadable(), System.Threading.Interlocked.Exchange(), System.Buffer.Memmove(), System.Math.Min(), System.pointer, System.Threading.Interlocked.Read(), and System.Runtime.InteropServices.SafeBuffer.ReleasePointer().

Referenced by System.IO.UnmanagedMemoryStream.Read(), System.IO.PinnedBufferMemoryStream.Read(), and System.IO.UnmanagedMemoryStream.Read().