replace

Description:

public static bool replace (ref Object? oldobj, Object? newobj)

Atomically modifies a pointer to point to a new object.

The reference count of oldobj is decreased and the reference count of newobj is increased.

Either newobj and the value pointed to by oldobj may be null.

Parameters:

oldobj

pointer to a place of a Object to replace
newobj

a new Object

Returns:

true if newobj was different from oldobj