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 9*d5410ed8SSatish Balay #define petscsetcommonblocknumeric_ PETSCSETCOMMONBLOCKNUMERIC 10ba9a049bSBarry Smith #elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE) 11ba9a049bSBarry Smith #define petscinitializefortran_ petscinitializefortran 12ba9a049bSBarry Smith #define petscsetcommonblock_ petscsetcommonblock 13ba9a049bSBarry Smith #define petscsetfortranbasepointers_ petscsetfortranbasepointers 14ba9a049bSBarry Smith #define petsc_null_function_ petsc_null_function 15*d5410ed8SSatish Balay #define petscsetcommonblocknumeric_ petscsetcommonblocknumeric 16ba9a049bSBarry Smith #endif 17ba9a049bSBarry Smith 18ba9a049bSBarry Smith #if defined(PETSC_HAVE_FORTRAN_UNDERSCORE_UNDERSCORE) 19ba9a049bSBarry Smith #define petsc_null_function_ petsc_null_function__ 20ba9a049bSBarry Smith #endif 21ba9a049bSBarry Smith 2251674068SBarry Smith PETSC_EXTERN void PETSC_STDCALL petscsetcommonblock_(MPI_Fint*,MPI_Fint*); 2351674068SBarry Smith PETSC_EXTERN void PETSC_STDCALL petscsetcommonblockmpi_(MPI_Fint*,MPI_Fint*,MPI_Fint*); 24639f5a5bSBarry Smith PETSC_EXTERN void PETSC_STDCALL petscsetcommonblocknumeric_(PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*); 25ba9a049bSBarry Smith 26ba9a049bSBarry Smith /*@C 27ba9a049bSBarry Smith PetscInitializeFortran - Routine that should be called soon AFTER 28ba9a049bSBarry Smith the call to PetscInitialize() if one is using a C main program 29ba9a049bSBarry Smith that calls Fortran routines that in turn call PETSc routines. 30ba9a049bSBarry Smith 31ba9a049bSBarry Smith Collective on PETSC_COMM_WORLD 32ba9a049bSBarry Smith 33ba9a049bSBarry Smith Level: beginner 34ba9a049bSBarry Smith 35ba9a049bSBarry Smith Notes: 36ba9a049bSBarry Smith PetscInitializeFortran() initializes some of the default viewers, 37ba9a049bSBarry Smith communicators, etc. for use in the Fortran if a user's main program is 38ba9a049bSBarry Smith written in C. PetscInitializeFortran() is NOT needed if a user's main 39ba9a049bSBarry Smith program is written in Fortran; in this case, just calling 40ba9a049bSBarry Smith PetscInitialize() in the main (Fortran) program is sufficient. 41ba9a049bSBarry Smith 42ba9a049bSBarry Smith .seealso: PetscInitialize() 43ba9a049bSBarry Smith 44ba9a049bSBarry Smith .keywords: Mixing C and Fortran, passing PETSc objects to Fortran 45ba9a049bSBarry Smith @*/ 46ba9a049bSBarry Smith PetscErrorCode PetscInitializeFortran(void) 47ba9a049bSBarry Smith { 4851674068SBarry Smith MPI_Fint c1=0,c2=0; 49ba9a049bSBarry Smith 50a297a907SKarl Rupp if (PETSC_COMM_WORLD) c1 = MPI_Comm_c2f(PETSC_COMM_WORLD); 51ba9a049bSBarry Smith c2 = MPI_Comm_c2f(PETSC_COMM_SELF); 52ba9a049bSBarry Smith petscsetcommonblock_(&c1,&c2); 5351674068SBarry Smith 54122e1178SBarry Smith #if defined(PETSC_USE_REAL___FLOAT128) 5551674068SBarry Smith { 5651674068SBarry Smith MPI_Fint freal,fscalar,fsum; 57122e1178SBarry Smith freal = MPI_Type_c2f(MPIU_REAL); 58122e1178SBarry Smith fscalar = MPI_Type_c2f(MPIU_SCALAR); 59122e1178SBarry Smith fsum = MPI_Op_c2f(MPIU_SUM); 60122e1178SBarry Smith petscsetcommonblockmpi_(&freal,&fscalar,&fsum); 6151674068SBarry Smith } 6251674068SBarry Smith #endif 63639f5a5bSBarry Smith 64639f5a5bSBarry Smith { 65639f5a5bSBarry Smith PetscReal pi = PETSC_PI; 66639f5a5bSBarry Smith PetscReal maxreal = PETSC_MAX_REAL; 67639f5a5bSBarry Smith PetscReal minreal = PETSC_MIN_REAL; 68639f5a5bSBarry Smith PetscReal eps = PETSC_MACHINE_EPSILON; 69639f5a5bSBarry Smith PetscReal seps = PETSC_SQRT_MACHINE_EPSILON; 70639f5a5bSBarry Smith PetscReal small = PETSC_SMALL; 71639f5a5bSBarry Smith PetscReal pinf = PETSC_INFINITY; 72639f5a5bSBarry Smith PetscReal pninf = PETSC_NINFINITY; 73639f5a5bSBarry Smith petscsetcommonblocknumeric_(&pi,&maxreal,&minreal,&eps,&seps,&small,&pinf,&pninf); 74639f5a5bSBarry Smith } 75ba9a049bSBarry Smith return 0; 76ba9a049bSBarry Smith } 77ba9a049bSBarry Smith 788cc058d9SJed Brown PETSC_EXTERN void PETSC_STDCALL petscinitializefortran_(int *ierr) 79ba9a049bSBarry Smith { 80ba9a049bSBarry Smith *ierr = PetscInitializeFortran(); 81ba9a049bSBarry Smith } 82ba9a049bSBarry Smith 838cc058d9SJed Brown PETSC_EXTERN void PETSC_STDCALL petscsetfortranbasepointers_(char *fnull_character PETSC_MIXED_LEN(len), 840298fd71SBarry Smith void *fnull_integer,void *fnull_scalar,void * fnull_double, 85ba9a049bSBarry Smith void *fnull_real,void *fnull_object, 86ba9a049bSBarry Smith void* fnull_truth,void (*fnull_function)(void) PETSC_END_LEN(len)) 87ba9a049bSBarry Smith { 88ba9a049bSBarry Smith PETSC_NULL_CHARACTER_Fortran = fnull_character; 89ba9a049bSBarry Smith PETSC_NULL_INTEGER_Fortran = fnull_integer; 90ba9a049bSBarry Smith PETSC_NULL_SCALAR_Fortran = fnull_scalar; 91ba9a049bSBarry Smith PETSC_NULL_DOUBLE_Fortran = fnull_double; 92ba9a049bSBarry Smith PETSC_NULL_REAL_Fortran = fnull_real; 93ba9a049bSBarry Smith PETSC_NULL_OBJECT_Fortran = fnull_object; 94ba9a049bSBarry Smith PETSC_NULL_BOOL_Fortran = fnull_truth; 95ba9a049bSBarry Smith PETSC_NULL_FUNCTION_Fortran = fnull_function; 96ba9a049bSBarry Smith } 97ba9a049bSBarry Smith 98ba9a049bSBarry Smith /* 99ba9a049bSBarry Smith A valid address for the fortran variable PETSC_NULL_FUNCTION 100ba9a049bSBarry Smith */ 1018cc058d9SJed Brown PETSC_EXTERN void petsc_null_function_(void) 102ba9a049bSBarry Smith { 103ba9a049bSBarry Smith return; 104ba9a049bSBarry Smith } 105ba9a049bSBarry Smith 106ba9a049bSBarry Smith 107