Deregisters the calling thread from use with the runtime. If this routine is called for a thread which is not registered, the result is undefined.

NOTE: This routine does not run thread-local static destructors when called. If full functionality as a D thread is desired, the following function must be called before thread_detachThis, particularly if the thread is being detached at some indeterminate time before program termination:

extern(C) void rt_moduleTlsDtor();