mp_isync Subroutine

   SUBROUTINE mp_isync(group, request)
      !! synchronizes with a barrier a given group of mpi tasks

      INTEGER, INTENT(IN)                                :: group
         !! mpi communicator
      INTEGER, INTENT(OUT)                               :: request

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

      INTEGER                                            :: handle, ierr

      ierr = 0
      CALL timeset(routineN, handle)

#if defined(__parallel)
      CALL mpi_ibarrier(group, request, ierr)
      IF (ierr /= 0) CALL mp_stop(ierr, "mpi_ibarrier @ "//routineN)
#else
      MARK_USED(group)
      request = mp_request_null
#endif
      CALL timestop(handle)

   END SUBROUTINE mp_isync