pthread_join

                  PTHREAD_JOIN32(),  PTHREAD_JOIN64()

      The pthread_join32() and pthread_join64() forms are only
      valid in 64-bit pointer environments for OpenVMS Alpha.
      Ensure that your compiler provides 64-bit support before you
      use pthread_join64().

   Causes the calling thread to wait for the termination of a
   specified thread.
 

Additional information available:

C_Binding       Arguments       Description     Return_Values
Associated_Routines