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 20*51674068SBarry Smith PETSC_EXTERN void PETSC_STDCALL petscsetcommonblock_(MPI_Fint*,MPI_Fint*); 21*51674068SBarry Smith PETSC_EXTERN void PETSC_STDCALL petscsetcommonblockmpi_(MPI_Fint*,MPI_Fint*,MPI_Fint*); 22ba9a049bSBarry Smith 23ba9a049bSBarry Smith /*@C 24ba9a049bSBarry Smith PetscInitializeFortran - Routine that should be called soon AFTER 25ba9a049bSBarry Smith the call to PetscInitialize() if one is using a C main program 26ba9a049bSBarry Smith that calls Fortran routines that in turn call PETSc routines. 27ba9a049bSBarry Smith 28ba9a049bSBarry Smith Collective on PETSC_COMM_WORLD 29ba9a049bSBarry Smith 30ba9a049bSBarry Smith Level: beginner 31ba9a049bSBarry Smith 32ba9a049bSBarry Smith Notes: 33ba9a049bSBarry Smith PetscInitializeFortran() initializes some of the default viewers, 34ba9a049bSBarry Smith communicators, etc. for use in the Fortran if a user's main program is 35ba9a049bSBarry Smith written in C. PetscInitializeFortran() is NOT needed if a user's main 36ba9a049bSBarry Smith program is written in Fortran; in this case, just calling 37ba9a049bSBarry Smith PetscInitialize() in the main (Fortran) program is sufficient. 38ba9a049bSBarry Smith 39ba9a049bSBarry Smith .seealso: PetscInitialize() 40ba9a049bSBarry Smith 41ba9a049bSBarry Smith .keywords: Mixing C and Fortran, passing PETSc objects to Fortran 42ba9a049bSBarry Smith @*/ 43ba9a049bSBarry Smith PetscErrorCode PetscInitializeFortran(void) 44ba9a049bSBarry Smith { 45*51674068SBarry Smith MPI_Fint c1=0,c2=0; 46ba9a049bSBarry Smith 47a297a907SKarl Rupp if (PETSC_COMM_WORLD) c1 = MPI_Comm_c2f(PETSC_COMM_WORLD); 48ba9a049bSBarry Smith c2 = MPI_Comm_c2f(PETSC_COMM_SELF); 49ba9a049bSBarry Smith petscsetcommonblock_(&c1,&c2); 50*51674068SBarry Smith 51*51674068SBarry Smith #if defined(PETSC_USE___FLOAT128) 52*51674068SBarry Smith { 53*51674068SBarry Smith MPI_Fint freal,fscalar,fsum; 54*51674068SBarry Smith ierr = MPI_Type_c2f(MPIU_REAL,&freal);CHKERRQ(ierr); 55*51674068SBarry Smith ierr = MPI_Type_c2f(MPIU_COMPLEX,&fcomplex);CHKERRQ(ierr); 56*51674068SBarry Smith ierr = MPI_Op_c2f(MPIU_SUM,&fsum);CHKERRQ(ierr); 57*51674068SBarry Smith petscsetcommonblockmpi_(&freal,&fcomplex,&fsum); 58*51674068SBarry Smith } 59*51674068SBarry Smith #endif 60ba9a049bSBarry Smith return 0; 61ba9a049bSBarry Smith } 62ba9a049bSBarry Smith 638cc058d9SJed Brown PETSC_EXTERN void PETSC_STDCALL petscinitializefortran_(int *ierr) 64ba9a049bSBarry Smith { 65ba9a049bSBarry Smith *ierr = PetscInitializeFortran(); 66ba9a049bSBarry Smith } 67ba9a049bSBarry Smith 688cc058d9SJed Brown PETSC_EXTERN void PETSC_STDCALL petscsetfortranbasepointers_(char *fnull_character PETSC_MIXED_LEN(len), 690298fd71SBarry Smith void *fnull_integer,void *fnull_scalar,void * fnull_double, 70ba9a049bSBarry Smith void *fnull_real,void *fnull_object, 71ba9a049bSBarry Smith void* fnull_truth,void (*fnull_function)(void) PETSC_END_LEN(len)) 72ba9a049bSBarry Smith { 73ba9a049bSBarry Smith PETSC_NULL_CHARACTER_Fortran = fnull_character; 74ba9a049bSBarry Smith PETSC_NULL_INTEGER_Fortran = fnull_integer; 75ba9a049bSBarry Smith PETSC_NULL_SCALAR_Fortran = fnull_scalar; 76ba9a049bSBarry Smith PETSC_NULL_DOUBLE_Fortran = fnull_double; 77ba9a049bSBarry Smith PETSC_NULL_REAL_Fortran = fnull_real; 78ba9a049bSBarry Smith PETSC_NULL_OBJECT_Fortran = fnull_object; 79ba9a049bSBarry Smith PETSC_NULL_BOOL_Fortran = fnull_truth; 80ba9a049bSBarry Smith PETSC_NULL_FUNCTION_Fortran = fnull_function; 81ba9a049bSBarry Smith } 82ba9a049bSBarry Smith 83ba9a049bSBarry Smith /* 84ba9a049bSBarry Smith A valid address for the fortran variable PETSC_NULL_FUNCTION 85ba9a049bSBarry Smith */ 868cc058d9SJed Brown PETSC_EXTERN void petsc_null_function_(void) 87ba9a049bSBarry Smith { 88ba9a049bSBarry Smith return; 89ba9a049bSBarry Smith } 90ba9a049bSBarry Smith 91ba9a049bSBarry Smith 92