Description

   This routine changes the object name in the thread-specific
   data key object specified by the key argument to the value
   specified by the name argument. To set a new thread-specific data
   key object's object name, call this routine immediately after
   initializing the key object.

   The object name is a C language string and provides an identifier
   that is meaningful to a person debugging a multithreaded
   application. The maximum number of characters in the object name
   is 31.