private T[] GetArrayHelper <T>(GetArrayDelegate pDelegate, Action <IntPtr, T[]> copyFunc)
where T : struct
{
UInt32 size = 0;
IntPtr values = IntPtr.Zero;
PInvokeUtils.ThrowIfResult(pDelegate(this.Interface, ref size, ref values));
T[] retValues = new T[size];
copyFunc(values, retValues);
Marshal.FreeCoTaskMem(values);
return(retValues);
}
internal static IntPtr[] GetPtrArray(GetArrayDelegate pInvokeAction)
{
IntPtr values = IntPtr.Zero;
UInt32 size = 0;
int result = pInvokeAction(ref size, ref values);
ThrowIfResult(result);
IntPtr[] retValues = new IntPtr[size];
if (size > 0)
{
Marshal.Copy(values, retValues, 0, retValues.Length);
}
if (values != IntPtr.Zero)
{
Marshal.FreeCoTaskMem(values);
}
return(retValues);
}
private static T[] GetIntfArray <T>(GetArrayDelegate f) where T : class
{
f(out var h, out var cnt);
return(cnt == 0 ? new T[0] : h.ToEnumerable <IntPtr>((int)cnt).Select(p => (T)Marshal.GetObjectForIUnknown(p)).ToArray());
}
