Date: 2022-08-02T03:13:29+00:00

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*/