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_(int*,int*); 21 22 /*@C 23 PetscInitializeFortran - Routine that should be called soon AFTER 24 the call to PetscInitialize() if one is using a C main program 25 that calls Fortran routines that in turn call PETSc routines. 26 27 Collective on PETSC_COMM_WORLD 28 29 Level: beginner 30 31 Notes: 32 PetscInitializeFortran() initializes some of the default viewers, 33 communicators, etc. for use in the Fortran if a user's main program is 34 written in C. PetscInitializeFortran() is NOT needed if a user's main 35 program is written in Fortran; in this case, just calling 36 PetscInitialize() in the main (Fortran) program is sufficient. 37 38 .seealso: PetscInitialize() 39 40 .keywords: Mixing C and Fortran, passing PETSc objects to Fortran 41 @*/ 42 PetscErrorCode PetscInitializeFortran(void) 43 { 44 PetscMPIInt c1=0,c2=0; 45 46 if (PETSC_COMM_WORLD) c1 = MPI_Comm_c2f(PETSC_COMM_WORLD); 47 /* PETSC_COMM_SELF is defined as MPI_COMM_SELF */ 48 c2 = MPI_Comm_c2f(PETSC_COMM_SELF); 49 petscsetcommonblock_(&c1,&c2); 50 return 0; 51 } 52 53 PETSC_EXTERN void PETSC_STDCALL petscinitializefortran_(int *ierr) 54 { 55 *ierr = PetscInitializeFortran(); 56 } 57 58 PETSC_EXTERN void PETSC_STDCALL petscsetfortranbasepointers_(char *fnull_character PETSC_MIXED_LEN(len), 59 void *fnull_integer,void *fnull_scalar,void * fnull_double, 60 void *fnull_real,void *fnull_object, 61 void* fnull_truth,void (*fnull_function)(void) PETSC_END_LEN(len)) 62 { 63 PETSC_NULL_CHARACTER_Fortran = fnull_character; 64 PETSC_NULL_INTEGER_Fortran = fnull_integer; 65 PETSC_NULL_SCALAR_Fortran = fnull_scalar; 66 PETSC_NULL_DOUBLE_Fortran = fnull_double; 67 PETSC_NULL_REAL_Fortran = fnull_real; 68 PETSC_NULL_OBJECT_Fortran = fnull_object; 69 PETSC_NULL_BOOL_Fortran = fnull_truth; 70 PETSC_NULL_FUNCTION_Fortran = fnull_function; 71 } 72 73 /* 74 A valid address for the fortran variable PETSC_NULL_FUNCTION 75 */ 76 PETSC_EXTERN void petsc_null_function_(void) 77 { 78 return; 79 } 80 81 82