Informs a garbage collector that the characters in the memory block defined by a base address pointer and block size contains no traceable pointers.
Address of first character that no longer contains traceable pointers.
Size of block that starts at _Ptr that contains no traceable pointers.
The function informs any garbage collector that the range of addresses [_Ptr, _Ptr + _Size) no longer contain traceable pointers. (Any pointers to allocated storage must not be dereferenced unless made reachable.)