On Alpha and Integrity server systems, reserves a persona ID
    in the server's persona table to be filled in by the $PERSONA_
    DELEGATE system service.

    Format

      SYS$PERSONA_RESERVE  clientPID ,persona

    C Prototype

      int sys$persona_reserve  (unsigned int *clientPID, unsigned int

                               *persona);

  Additional Information (explode) :

• Arguments