Actual source code: ex16.c


  2: static char help[] = "Tests calling PetscOptionsSetValue() before PetscInitialize()\n\n";

  4: #include <petscsys.h>
  5: int main(int argc,char **argv)
  6: {
  8:   PetscMPIInt    rank,size;

 10:   /*
 11:     Every PETSc routine should begin with the PetscInitialize() routine.
 12:     argc, argv - These command line arguments are taken to extract the options
 13:                  supplied to PETSc and options supplied to MPI.
 14:     help       - When PETSc executable is invoked with the option -help,
 15:                  it prints the various options that can be applied at
 16:                  runtime.  The user can use the "help" variable place
 17:                  additional help messages in this printout.

 19:     Since when PetscInitialize() returns with an error the PETSc data structures
 20:     may not be set up hence we cannot call PetscCall() hence directly return the error code.

 22:     Since PetscOptionsSetValue() is called before the PetscInitialize() we cannot call
 23:     PetscCall() on the error code and just return it directly.
 24:   */
 25:   PetscOptionsSetValue(NULL,"-no_signal_handler","true");if (ierr) return ierr;
 26:   PetscInitialize(&argc,&argv,(char*)0,help);
 27:   MPI_Comm_size(PETSC_COMM_WORLD,&size);
 28:   MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
 29:   PetscPrintf(PETSC_COMM_WORLD,"Number of processors = %d, rank = %d\n",size,rank);
 30:   PetscFinalize();
 31:   return 0;
 32: }

 34: /*TEST

 36:    test:
 37:       requires: defined(PETSC_USE_LOG)
 38:       nsize: 2
 39:       args: -options_view -get_total_flops
 40:       filter: egrep -v "(cuda_initialize|malloc|display|nox|Total flops|saws_port_auto_select|vecscatter_mpi1|options_left|error_output_stdout|check_pointer_intensity|use_gpu_aware_mpi|checkstack)"

 42: TEST*/