C -*- Mode: Fortran; -*- 

C

C  (C) 2003 by Argonne National Laboratory.

C      See COPYRIGHT in top-level directory.

C

      program main

      implicit none

C     Test support for MPI_STATUS_IGNORE and MPI_STATUSES_IGNORE

      include 'mpif.h'

      integer nreqs

      parameter (nreqs = 100)

      integer reqs(nreqs)

      integer ierr, rank, i

      integer errs

      ierr = -1

      errs = 0

      call mpi_init( ierr )

      if (ierr .ne. MPI_SUCCESS) then

         errs = errs + 1

         print *, 'Unexpected return from MPI_INIT', ierr 

      endif

      ierr = -1

      call mpi_comm_rank( MPI_COMM_WORLD, rank, ierr )

      if (ierr .ne. MPI_SUCCESS) then

         errs = errs + 1

         print *, 'Unexpected return from MPI_COMM_WORLD', ierr 

      endif

      do i=1, nreqs, 2

         ierr = -1

         call mpi_isend( MPI_BOTTOM, 0, MPI_BYTE, rank, i,

     $        MPI_COMM_WORLD, reqs(i), ierr )

         if (ierr .ne. MPI_SUCCESS) then

            errs = errs + 1

            print *, 'Unexpected return from MPI_ISEND', ierr 

         endif

         ierr = -1

         call mpi_irecv( MPI_BOTTOM, 0, MPI_BYTE, rank, i,

     $        MPI_COMM_WORLD, reqs(i+1), ierr )

         if (ierr .ne. MPI_SUCCESS) then

            errs = errs + 1

            print *, 'Unexpected return from MPI_IRECV', ierr 

         endif

      enddo

      ierr = -1

      call mpi_waitall( nreqs, reqs, MPI_STATUSES_IGNORE, ierr )

      if (ierr .ne. MPI_SUCCESS) then

         errs = errs + 1

         print *, 'Unexpected return from MPI_WAITALL', ierr 

      endif

      call mtest_finalize( errs )

      call mpi_finalize( ierr )

      end