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 EXTERN_C_BEGIN 21 extern void PETSC_STDCALL petscsetcommonblock_(int*,int*); 22 EXTERN_C_END 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 PetscMPIInt c1=0,c2=0; 47 48 if (PETSC_COMM_WORLD) c1 = MPI_Comm_c2f(PETSC_COMM_WORLD); 49 /* PETSC_COMM_SELF is defined as MPI_COMM_SELF */ 50 c2 = MPI_Comm_c2f(PETSC_COMM_SELF); 51 petscsetcommonblock_(&c1,&c2); 52 return 0; 53 } 54 55 EXTERN_C_BEGIN 56 57 void PETSC_STDCALL petscinitializefortran_(int *ierr) 58 { 59 *ierr = PetscInitializeFortran(); 60 } 61 62 void PETSC_STDCALL petscsetfortranbasepointers_(char *fnull_character PETSC_MIXED_LEN(len), 63 void *fnull_integer,void *fnull_scalar,void * fnull_double, 64 void *fnull_real,void *fnull_object, 65 void* fnull_truth,void (*fnull_function)(void) PETSC_END_LEN(len)) 66 { 67 PETSC_NULL_CHARACTER_Fortran = fnull_character; 68 PETSC_NULL_INTEGER_Fortran = fnull_integer; 69 PETSC_NULL_SCALAR_Fortran = fnull_scalar; 70 PETSC_NULL_DOUBLE_Fortran = fnull_double; 71 PETSC_NULL_REAL_Fortran = fnull_real; 72 PETSC_NULL_OBJECT_Fortran = fnull_object; 73 PETSC_NULL_BOOL_Fortran = fnull_truth; 74 PETSC_NULL_FUNCTION_Fortran = fnull_function; 75 } 76 77 /* 78 A valid address for the fortran variable PETSC_NULL_FUNCTION 79 */ 80 void petsc_null_function_(void) 81 { 82 return; 83 } 84 85 EXTERN_C_END 86 87