1 2 #include <petsc-private/fortranimpl.h> 3 4 #if defined(PETSC_HAVE_FORTRAN_CAPS) 5 #define petscinitializefortran_ PETSCINITIALIZEFORTRAN 6 #define petscsetcommonblock_ PETSCSETCOMMONBLOCK 7 #define petscsetfortranbasepointers_ PETSCSETFORTRANBASEPOINTERS 8 #define petsc_null_function_ PETSC_NULL_FUNCTION 9 #elif !defined(PETSC_HAVE_FORTRAN_UNDERSCORE) 10 #define petscinitializefortran_ petscinitializefortran 11 #define petscsetcommonblock_ petscsetcommonblock 12 #define petscsetfortranbasepointers_ petscsetfortranbasepointers 13 #define petsc_null_function_ petsc_null_function 14 #endif 15 16 #if defined(PETSC_HAVE_FORTRAN_UNDERSCORE_UNDERSCORE) 17 #define petsc_null_function_ petsc_null_function__ 18 #endif 19 20 PETSC_EXTERN void PETSC_STDCALL petscsetcommonblock_(MPI_Fint*,MPI_Fint*); 21 PETSC_EXTERN void PETSC_STDCALL petscsetcommonblockmpi_(MPI_Fint*,MPI_Fint*,MPI_Fint*); 22 PETSC_EXTERN void PETSC_STDCALL petscsetcommonblocknumeric_(PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*,PetscReal*); 23 24 /*@C 25 PetscInitializeFortran - Routine that should be called soon AFTER 26 the call to PetscInitialize() if one is using a C main program 27 that calls Fortran routines that in turn call PETSc routines. 28 29 Collective on PETSC_COMM_WORLD 30 31 Level: beginner 32 33 Notes: 34 PetscInitializeFortran() initializes some of the default viewers, 35 communicators, etc. for use in the Fortran if a user's main program is 36 written in C. PetscInitializeFortran() is NOT needed if a user's main 37 program is written in Fortran; in this case, just calling 38 PetscInitialize() in the main (Fortran) program is sufficient. 39 40 .seealso: PetscInitialize() 41 42 .keywords: Mixing C and Fortran, passing PETSc objects to Fortran 43 @*/ 44 PetscErrorCode PetscInitializeFortran(void) 45 { 46 MPI_Fint c1=0,c2=0; 47 48 if (PETSC_COMM_WORLD) c1 = MPI_Comm_c2f(PETSC_COMM_WORLD); 49 c2 = MPI_Comm_c2f(PETSC_COMM_SELF); 50 petscsetcommonblock_(&c1,&c2); 51 52 #if defined(PETSC_USE_REAL___FLOAT128) 53 { 54 MPI_Fint freal,fscalar,fsum; 55 freal = MPI_Type_c2f(MPIU_REAL); 56 fscalar = MPI_Type_c2f(MPIU_SCALAR); 57 fsum = MPI_Op_c2f(MPIU_SUM); 58 petscsetcommonblockmpi_(&freal,&fscalar,&fsum); 59 } 60 #endif 61 62 { 63 PetscReal pi = PETSC_PI; 64 PetscReal maxreal = PETSC_MAX_REAL; 65 PetscReal minreal = PETSC_MIN_REAL; 66 PetscReal eps = PETSC_MACHINE_EPSILON; 67 PetscReal seps = PETSC_SQRT_MACHINE_EPSILON; 68 PetscReal small = PETSC_SMALL; 69 PetscReal pinf = PETSC_INFINITY; 70 PetscReal pninf = PETSC_NINFINITY; 71 petscsetcommonblocknumeric_(&pi,&maxreal,&minreal,&eps,&seps,&small,&pinf,&pninf); 72 } 73 return 0; 74 } 75 76 PETSC_EXTERN void PETSC_STDCALL petscinitializefortran_(int *ierr) 77 { 78 *ierr = PetscInitializeFortran(); 79 } 80 81 PETSC_EXTERN void PETSC_STDCALL petscsetfortranbasepointers_(char *fnull_character PETSC_MIXED_LEN(len), 82 void *fnull_integer,void *fnull_scalar,void * fnull_double, 83 void *fnull_real,void *fnull_object, 84 void* fnull_truth,void (*fnull_function)(void) PETSC_END_LEN(len)) 85 { 86 PETSC_NULL_CHARACTER_Fortran = fnull_character; 87 PETSC_NULL_INTEGER_Fortran = fnull_integer; 88 PETSC_NULL_SCALAR_Fortran = fnull_scalar; 89 PETSC_NULL_DOUBLE_Fortran = fnull_double; 90 PETSC_NULL_REAL_Fortran = fnull_real; 91 PETSC_NULL_OBJECT_Fortran = fnull_object; 92 PETSC_NULL_BOOL_Fortran = fnull_truth; 93 PETSC_NULL_FUNCTION_Fortran = fnull_function; 94 } 95 96 /* 97 A valid address for the fortran variable PETSC_NULL_FUNCTION 98 */ 99 PETSC_EXTERN void petsc_null_function_(void) 100 { 101 return; 102 } 103 104 105