1ba9a049bSBarry Smith 2ba9a049bSBarry Smith #include <petsc-private/fortranimpl.h> 3ba9a049bSBarry Smith 4519f805aSKarl Rupp #if defined(PETSC_HAVE_FORTRAN_CAPS) 5ba9a049bSBarry Smith #define petscinitializefortran_ PETSCINITIALIZEFORTRAN 6ba9a049bSBarry Smith #define petscsetcommonblock_ PETSCSETCOMMONBLOCK 7ba9a049bSBarry Smith #define petscsetfortranbasepointers_ PETSCSETFORTRANBASEPOINTERS 8ba9a049bSBarry Smith #define petsc_null_function_ PETSC_NULL_FUNCTION 9ba9a049bSBarry Smith #elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE) 10ba9a049bSBarry Smith #define petscinitializefortran_ petscinitializefortran 11ba9a049bSBarry Smith #define petscsetcommonblock_ petscsetcommonblock 12ba9a049bSBarry Smith #define petscsetfortranbasepointers_ petscsetfortranbasepointers 13ba9a049bSBarry Smith #define petsc_null_function_ petsc_null_function 14ba9a049bSBarry Smith #endif 15ba9a049bSBarry Smith 16ba9a049bSBarry Smith #if defined(PETSC_HAVE_FORTRAN_UNDERSCORE_UNDERSCORE) 17ba9a049bSBarry Smith #define petsc_null_function_ petsc_null_function__ 18ba9a049bSBarry Smith #endif 19ba9a049bSBarry Smith 2051674068SBarry Smith PETSC_EXTERN void PETSC_STDCALL petscsetcommonblock_(MPI_Fint*,MPI_Fint*); 2151674068SBarry Smith PETSC_EXTERN void PETSC_STDCALL petscsetcommonblockmpi_(MPI_Fint*,MPI_Fint*,MPI_Fint*); 22*639f5a5bSBarry Smith PETSC_EXTERN void PETSC_STDCALL petscsetcommonblocknumeric_(PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*); 23ba9a049bSBarry Smith 24ba9a049bSBarry Smith /*@C 25ba9a049bSBarry Smith PetscInitializeFortran - Routine that should be called soon AFTER 26ba9a049bSBarry Smith the call to PetscInitialize() if one is using a C main program 27ba9a049bSBarry Smith that calls Fortran routines that in turn call PETSc routines. 28ba9a049bSBarry Smith 29ba9a049bSBarry Smith Collective on PETSC_COMM_WORLD 30ba9a049bSBarry Smith 31ba9a049bSBarry Smith Level: beginner 32ba9a049bSBarry Smith 33ba9a049bSBarry Smith Notes: 34ba9a049bSBarry Smith PetscInitializeFortran() initializes some of the default viewers, 35ba9a049bSBarry Smith communicators, etc. for use in the Fortran if a user's main program is 36ba9a049bSBarry Smith written in C. PetscInitializeFortran() is NOT needed if a user's main 37ba9a049bSBarry Smith program is written in Fortran; in this case, just calling 38ba9a049bSBarry Smith PetscInitialize() in the main (Fortran) program is sufficient. 39ba9a049bSBarry Smith 40ba9a049bSBarry Smith .seealso: PetscInitialize() 41ba9a049bSBarry Smith 42ba9a049bSBarry Smith .keywords: Mixing C and Fortran, passing PETSc objects to Fortran 43ba9a049bSBarry Smith @*/ 44ba9a049bSBarry Smith PetscErrorCode PetscInitializeFortran(void) 45ba9a049bSBarry Smith { 4651674068SBarry Smith MPI_Fint c1=0,c2=0; 47ba9a049bSBarry Smith 48a297a907SKarl Rupp if (PETSC_COMM_WORLD) c1 = MPI_Comm_c2f(PETSC_COMM_WORLD); 49ba9a049bSBarry Smith c2 = MPI_Comm_c2f(PETSC_COMM_SELF); 50ba9a049bSBarry Smith petscsetcommonblock_(&c1,&c2); 5151674068SBarry Smith 52122e1178SBarry Smith #if defined(PETSC_USE_REAL___FLOAT128) 5351674068SBarry Smith { 5451674068SBarry Smith MPI_Fint freal,fscalar,fsum; 55122e1178SBarry Smith freal = MPI_Type_c2f(MPIU_REAL); 56122e1178SBarry Smith fscalar = MPI_Type_c2f(MPIU_SCALAR); 57122e1178SBarry Smith fsum = MPI_Op_c2f(MPIU_SUM); 58122e1178SBarry Smith petscsetcommonblockmpi_(&freal,&fscalar,&fsum); 5951674068SBarry Smith } 6051674068SBarry Smith #endif 61*639f5a5bSBarry Smith 62*639f5a5bSBarry Smith { 63*639f5a5bSBarry Smith PetscReal pi = PETSC_PI; 64*639f5a5bSBarry Smith PetscReal maxreal = PETSC_MAX_REAL; 65*639f5a5bSBarry Smith PetscReal minreal = PETSC_MIN_REAL; 66*639f5a5bSBarry Smith PetscReal eps = PETSC_MACHINE_EPSILON; 67*639f5a5bSBarry Smith PetscReal seps = PETSC_SQRT_MACHINE_EPSILON; 68*639f5a5bSBarry Smith PetscReal small = PETSC_SMALL; 69*639f5a5bSBarry Smith PetscReal pinf = PETSC_INFINITY; 70*639f5a5bSBarry Smith PetscReal pninf = PETSC_NINFINITY; 71*639f5a5bSBarry Smith petscsetcommonblocknumeric_(&pi,&maxreal,&minreal,&eps,&seps,&small,&pinf,&pninf); 72*639f5a5bSBarry Smith } 73ba9a049bSBarry Smith return 0; 74ba9a049bSBarry Smith } 75ba9a049bSBarry Smith 768cc058d9SJed Brown PETSC_EXTERN void PETSC_STDCALL petscinitializefortran_(int *ierr) 77ba9a049bSBarry Smith { 78ba9a049bSBarry Smith *ierr = PetscInitializeFortran(); 79ba9a049bSBarry Smith } 80ba9a049bSBarry Smith 818cc058d9SJed Brown PETSC_EXTERN void PETSC_STDCALL petscsetfortranbasepointers_(char *fnull_character PETSC_MIXED_LEN(len), 820298fd71SBarry Smith void *fnull_integer,void *fnull_scalar,void * fnull_double, 83ba9a049bSBarry Smith void *fnull_real,void *fnull_object, 84ba9a049bSBarry Smith void* fnull_truth,void (*fnull_function)(void) PETSC_END_LEN(len)) 85ba9a049bSBarry Smith { 86ba9a049bSBarry Smith PETSC_NULL_CHARACTER_Fortran = fnull_character; 87ba9a049bSBarry Smith PETSC_NULL_INTEGER_Fortran = fnull_integer; 88ba9a049bSBarry Smith PETSC_NULL_SCALAR_Fortran = fnull_scalar; 89ba9a049bSBarry Smith PETSC_NULL_DOUBLE_Fortran = fnull_double; 90ba9a049bSBarry Smith PETSC_NULL_REAL_Fortran = fnull_real; 91ba9a049bSBarry Smith PETSC_NULL_OBJECT_Fortran = fnull_object; 92ba9a049bSBarry Smith PETSC_NULL_BOOL_Fortran = fnull_truth; 93ba9a049bSBarry Smith PETSC_NULL_FUNCTION_Fortran = fnull_function; 94ba9a049bSBarry Smith } 95ba9a049bSBarry Smith 96ba9a049bSBarry Smith /* 97ba9a049bSBarry Smith A valid address for the fortran variable PETSC_NULL_FUNCTION 98ba9a049bSBarry Smith */ 998cc058d9SJed Brown PETSC_EXTERN void petsc_null_function_(void) 100ba9a049bSBarry Smith { 101ba9a049bSBarry Smith return; 102ba9a049bSBarry Smith } 103ba9a049bSBarry Smith 104ba9a049bSBarry Smith 105