Actual source code: ex16f.F90

      1: ! Tests calling PetscOptionsSetValue() before PetscInitialize(): Fortran Example

      3: program main
      4: #include <petsc/finclude/petscsys.h>
      5:       use petscmpi  ! or mpi or mpi_f08
      6:       use petscsys

      8:       implicit none
      9:       PetscErrorCode :: ierr
     10:       PetscMPIInt  ::  rank,size
     11:       character(len=80) :: outputString

     13:       ! Every PETSc routine should begin with the PetscInitialize() routine.

     15:       PetscCallA(PetscOptionsSetValue(PETSC_NULL_OPTIONS,'-no_signal_handler','true',ierr))
     16:       PetscCallA(PetscInitialize(ierr))

     18:       ! We can now change the communicator universe for PETSc

     20:       PetscCallMPIA(MPI_Comm_size(MPI_COMM_WORLD,size,ierr))
     21:       PetscCallMPIA(MPI_Comm_rank(MPI_COMM_WORLD,rank,ierr))
     22:       write(outputString,*) 'Number of processors =',size,'rank =',rank,'\n'
     23:       PetscCallA(PetscPrintf(PETSC_COMM_WORLD,outputString,ierr))
     24:       PetscCallA(PetscFinalize(ierr))
     25: end program main

     27: !/*TEST
     28: !
     29: !   test:
     30: !      requires: defined(PETSC_USE_LOG)
     31: !      nsize: 2
     32: !      args: -options_view -get_total_flops
     33: !      filter: grep -E -v "(Total flops)"
     34: !
     35: !TEST*/