public unsafe int NativeArrayOut(out int[] arr, int len)
{
var data = stackalloc int[3];
if (len <= 0)
{
throw new ArgumentOutOfRangeException(nameof(len));
}
var arrBuf = NativeUtils.ArrayToIntSpan(null, len);
fixed(int *pinned = arrBuf)
{
data[0] = NativeUtils.IntPointerToInt(pinned);
data[1] = NativeUtils.IntPointerToInt(data + 2);
data[2] = len;
var result = Interop.FastNativeInvoke(new IntPtr(9999), "A[*1]d", data);
arr = NativeUtils.IntSpanToArray <int>(null, arrBuf);
return(result);
}
}
public Span <int> CastArray(int[] a)
{
var spn = NativeUtils.ArrayToIntSpan(a, a.Length);
return(spn);
}