!

!  (C) 2008 by Argonne National Laboratory.

!      See COPYRIGHT in top-level directory.

!

        program main

! This is a simple test to check that both the MPI and PMPI versions of the

! timers are available, and that they return double precision values.

! If this code links, there are no problems.

!

          use mpi_f08

          implicit none

          integer err

          double precision time1

          call mpi_init(err)

          time1 = mpi_wtime()

          time1 = time1 + mpi_wtick()

          time1 = time1 + pmpi_wtime()

          time1 = time1 + pmpi_wtick()

! Add a test on time1 to ensure that the compiler does not remove the calls

! (The compiler should call them anyway because they aren't pure, but

! including these operations ensures that a buggy compiler doesn't

! pass this test by mistake).

          if (time1 .lt. 0.0d0) then

             print *, ' Negative time result'

          else

                print *, ' No Errors'

          endif

        end