mp_send_r Subroutine

      SUBROUTINE mp_send_r (msg, dest, tag, gid)
      !! Send one datum to another process
      !!
      !! MPI mapping
      !! mpi_send

         REAL(kind=real_4)                                :: msg
         !! Scalar to send
         INTEGER                                  :: dest, tag
         !! Destination process
         !! Transfer identifier
         TYPE(mp_comm_type), INTENT(IN)           :: gid
         !! Message passing environment identifier

         CHARACTER(LEN=*), PARAMETER :: routineN = 'mp_send_r'

         INTEGER                                  :: handle, ierr, msglen

         ierr = 0
         CALL timeset(routineN, handle)

         msglen = 1
#if defined(__parallel)
         CALL mpi_send(msg, msglen, MPI_REAL, dest, tag, gid%handle, ierr)
         IF (ierr /= 0) CALL mp_stop(ierr, "mpi_send @ "//routineN)
         CALL add_perf(perf_id=13, msg_size=msglen*real_4_size)
#else
         MARK_USED(msg)
         MARK_USED(dest)
         MARK_USED(tag)
         MARK_USED(gid)
         ! only defined in parallel
         DBCSR_ABORT("not in parallel mode")
#endif
         CALL timestop(handle)
      END SUBROUTINE mp_send_r