xref: /petsc/include/petsc/private/ftnimpl.h (revision 371d2eb7c12e2e633516fd846e18141c0cd1b5b5)
1 #pragma once
2 
3 #include <petsc/private/petscimpl.h>
4 PETSC_INTERN PetscErrorCode PETScParseFortranArgs_Private(int *, char ***);
5 PETSC_EXTERN PetscErrorCode PetscMPIFortranDatatypeToC(MPI_Fint, MPI_Datatype *);
6 
7 PETSC_EXTERN PetscErrorCode PetscScalarAddressToFortran(PetscObject, PetscInt, PetscScalar *, PetscScalar *, PetscInt, size_t *);
8 PETSC_EXTERN PetscErrorCode PetscScalarAddressFromFortran(PetscObject, PetscScalar *, size_t, PetscInt, PetscScalar **);
9 PETSC_EXTERN size_t         PetscIntAddressToFortran(const PetscInt *, const PetscInt *);
10 PETSC_EXTERN PetscInt      *PetscIntAddressFromFortran(const PetscInt *, size_t);
11 PETSC_EXTERN char          *PETSC_NULL_CHARACTER_Fortran;
12 PETSC_EXTERN void          *PETSC_NULL_INTEGER_Fortran;
13 PETSC_EXTERN void          *PETSC_NULL_SCALAR_Fortran;
14 PETSC_EXTERN void          *PETSC_NULL_DOUBLE_Fortran;
15 PETSC_EXTERN void          *PETSC_NULL_REAL_Fortran;
16 PETSC_EXTERN void          *PETSC_NULL_BOOL_Fortran;
17 PETSC_EXTERN void          *PETSC_NULL_ENUM_Fortran;
18 PETSC_EXTERN void          *PETSC_NULL_INTEGER_ARRAY_Fortran;
19 PETSC_EXTERN void          *PETSC_NULL_SCALAR_ARRAY_Fortran;
20 PETSC_EXTERN void          *PETSC_NULL_REAL_ARRAY_Fortran;
21 PETSC_EXTERN void          *PETSC_NULL_MPI_COMM_Fortran;
22 PETSC_EXTERN void          *PETSC_NULL_INTEGER_POINTER_Fortran;
23 PETSC_EXTERN void          *PETSC_NULL_SCALAR_POINTER_Fortran;
24 PETSC_EXTERN void          *PETSC_NULL_REAL_POINTER_Fortran;
25 PETSC_EXTERN void (*PETSC_NULL_FUNCTION_Fortran)(void);
26 
27 PETSC_INTERN PetscErrorCode PetscInitFortran_Private(const char *, PetscInt);
28 
29 /*  ----------------------------------------------------------------------*/
30 /*
31    PETSc object C pointers are stored directly as
32    Fortran integer*4 or *8 depending on the size of pointers.
33 */
34 
35 /* --------------------------------------------------------------------*/
36 /*
37     Since Fortran does not null terminate strings we need to insure the string is null terminated before passing it
38     to C. This may require a memory allocation which is then freed with FREECHAR().
39 */
40 #define FIXCHAR(a, n, b) \
41   do { \
42     if ((a) == PETSC_NULL_CHARACTER_Fortran) { \
43       (b) = PETSC_NULLPTR; \
44       (a) = PETSC_NULLPTR; \
45     } else { \
46       while (((n) > 0) && ((a)[(n) - 1] == ' ')) (n)--; \
47       *ierr = PetscMalloc1((n) + 1, &(b)); \
48       if (*ierr) return; \
49       *ierr  = PetscMemcpy((b), (a), (n)); \
50       (b)[n] = '\0'; \
51       if (*ierr) return; \
52     } \
53   } while (0)
54 #define FREECHAR(a, b) \
55   do { \
56     if (a != b) *ierr = PetscFree(b); \
57   } while (0)
58 
59 /*
60     Fortran expects any unneeded characters at the end of its strings to be filled with the blank character.
61 */
62 #define FIXRETURNCHAR(flg, a, n) \
63   do { \
64     if (flg) { \
65       PETSC_FORTRAN_CHARLEN_T __i; \
66       for (__i = 0; __i < n && a[__i] != 0; __i++) { }; \
67       for (; __i < n; __i++) a[__i] = ' '; \
68     } \
69   } while (0)
70 
71 /*
72     The cast through PETSC_UINTPTR_T is so that compilers that warn about casting to/from void * to void(*)(void)
73     will not complain about these comparisons. It is not know if this works for all compilers
74 */
75 #define FORTRANNULLINTEGERPOINTER(a) (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_INTEGER_POINTER_Fortran)
76 #define FORTRANNULLSCALARPOINTER(a)  (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_SCALAR_POINTER_Fortran)
77 #define FORTRANNULLREALPOINTER(a)    (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_REAL_POINTER_Fortran)
78 #define FORTRANNULLINTEGER(a)        (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_INTEGER_Fortran || ((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_INTEGER_ARRAY_Fortran)
79 #define FORTRANNULLSCALAR(a)         (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_SCALAR_Fortran || ((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_SCALAR_ARRAY_Fortran)
80 #define FORTRANNULLREAL(a)           (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_REAL_Fortran || ((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_REAL_ARRAY_Fortran)
81 #define FORTRANNULLDOUBLE(a)         (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_DOUBLE_Fortran)
82 #define FORTRANNULLBOOL(a)           (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_BOOL_Fortran)
83 #define FORTRANNULLENUM(a)           ((((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_ENUM_Fortran) || (((void *)(PETSC_UINTPTR_T)a) == (void *)-50))
84 #define FORTRANNULLCHARACTER(a)      (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_CHARACTER_Fortran)
85 #define FORTRANNULLFUNCTION(a)       (((void (*)(void))(PETSC_UINTPTR_T)a) == PETSC_NULL_FUNCTION_Fortran)
86 #define FORTRANNULLOBJECT(a)         (*(void **)(PETSC_UINTPTR_T)a == (void *)0)
87 #define FORTRANNULLMPICOMM(a)        (((void *)(PETSC_UINTPTR_T)a) == PETSC_NULL_MPI_COMM_Fortran)
88 
89 /*
90     A Fortran object with a value of (void*) 0 is indicated in Fortran by PETSC_NULL_XXXX, it is passed to routines to indicate the argument value is not requested or provided
91     similar to how NULL is used with PETSc objects in C
92 
93     A Fortran object with a value of (void*) PETSC_FORTRAN_TYPE_INITIALIZE (-2) is an object that was never created or was destroyed (see checkFortranTypeInitialize()).
94 
95     A Fortran object with a value of (void*) -3 happens when a PETSc routine returns in one of its arguments a NULL object
96     (it cannot return a value of (void*) 0 because if later the returned variable is passed to a creation routine, it would think one has passed in a PETSC_NULL_XXX and error).
97 
98     These three values are used because Fortran always uses pass by reference so one cannot pass a NULL address, only an address with special
99     values at the location.
100 */
101 
102 #define CHKFORTRANNULL(a) \
103   do { \
104     if (FORTRANNULLINTEGER(a) || FORTRANNULLENUM(a) || FORTRANNULLDOUBLE(a) || FORTRANNULLSCALAR(a) || FORTRANNULLREAL(a) || FORTRANNULLBOOL(a) || FORTRANNULLFUNCTION(a) || FORTRANNULLCHARACTER(a) || FORTRANNULLMPICOMM(a)) { a = PETSC_NULLPTR; } \
105   } while (0)
106 
107 #define CHKFORTRANNULLENUM(a) \
108   do { \
109     if (FORTRANNULLENUM(a)) { a = PETSC_NULLPTR; } \
110   } while (0)
111 
112 #define CHKFORTRANNULLINTEGER(a) \
113   do { \
114     if (FORTRANNULLINTEGER(a) || FORTRANNULLENUM(a)) { \
115       a = PETSC_NULLPTR; \
116     } else if (FORTRANNULLDOUBLE(a) || FORTRANNULLSCALAR(a) || FORTRANNULLREAL(a) || FORTRANNULLBOOL(a) || FORTRANNULLFUNCTION(a) || FORTRANNULLCHARACTER(a) || FORTRANNULLMPICOMM(a)) { \
117       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Use PETSC_NULL_INTEGER"); \
118       *ierr = PETSC_ERR_ARG_BADPTR; \
119       return; \
120     } \
121   } while (0)
122 
123 #define CHKFORTRANNULLSCALAR(a) \
124   do { \
125     if (FORTRANNULLSCALAR(a)) { \
126       a = PETSC_NULLPTR; \
127     } else if (FORTRANNULLINTEGER(a) || FORTRANNULLDOUBLE(a) || FORTRANNULLREAL(a) || FORTRANNULLBOOL(a) || FORTRANNULLFUNCTION(a) || FORTRANNULLCHARACTER(a) || FORTRANNULLMPICOMM(a)) { \
128       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Use PETSC_NULL_SCALAR"); \
129       *ierr = PETSC_ERR_ARG_BADPTR; \
130       return; \
131     } \
132   } while (0)
133 
134 #define CHKFORTRANNULLDOUBLE(a) \
135   do { \
136     if (FORTRANNULLDOUBLE(a)) { \
137       a = PETSC_NULLPTR; \
138     } else if (FORTRANNULLINTEGER(a) || FORTRANNULLSCALAR(a) || FORTRANNULLREAL(a) || FORTRANNULLBOOL(a) || FORTRANNULLFUNCTION(a) || FORTRANNULLCHARACTER(a) || FORTRANNULLMPICOMM(a)) { \
139       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Use PETSC_NULL_DOUBLE"); \
140       *ierr = PETSC_ERR_ARG_BADPTR; \
141       return; \
142     } \
143   } while (0)
144 
145 #define CHKFORTRANNULLREAL(a) \
146   do { \
147     if (FORTRANNULLREAL(a)) { \
148       a = PETSC_NULLPTR; \
149     } else if (FORTRANNULLINTEGER(a) || FORTRANNULLDOUBLE(a) || FORTRANNULLSCALAR(a) || FORTRANNULLBOOL(a) || FORTRANNULLFUNCTION(a) || FORTRANNULLCHARACTER(a) || FORTRANNULLMPICOMM(a)) { \
150       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Use PETSC_NULL_REAL"); \
151       *ierr = PETSC_ERR_ARG_BADPTR; \
152       return; \
153     } \
154   } while (0)
155 
156 #define CHKFORTRANNULLOBJECT(a) \
157   do { \
158     if (!(*(void **)a)) { \
159       a = PETSC_NULLPTR; \
160     } else if (FORTRANNULLINTEGER(a) || FORTRANNULLDOUBLE(a) || FORTRANNULLSCALAR(a) || FORTRANNULLREAL(a) || FORTRANNULLBOOL(a) || FORTRANNULLFUNCTION(a) || FORTRANNULLCHARACTER(a) || FORTRANNULLMPICOMM(a)) { \
161       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Use PETSC_NULL_XXX where XXX is the name of a particular object class"); \
162       *ierr = PETSC_ERR_ARG_BADPTR; \
163       return; \
164     } \
165   } while (0)
166 
167 #define CHKFORTRANNULLBOOL(a) \
168   do { \
169     if (FORTRANNULLBOOL(a)) { \
170       a = PETSC_NULLPTR; \
171     } else if (FORTRANNULLSCALAR(a) || FORTRANNULLINTEGER(a) || FORTRANNULLDOUBLE(a) || FORTRANNULLSCALAR(a) || FORTRANNULLREAL(a) || FORTRANNULLFUNCTION(a) || FORTRANNULLCHARACTER(a) || FORTRANNULLMPICOMM(a)) { \
172       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Use PETSC_NULL_BOOL"); \
173       *ierr = PETSC_ERR_ARG_BADPTR; \
174       return; \
175     } \
176   } while (0)
177 
178 #define CHKFORTRANNULLFUNCTION(a) \
179   do { \
180     if (FORTRANNULLFUNCTION(a)) { \
181       a = PETSC_NULLPTR; \
182     } else if (FORTRANNULLOBJECT(a) || FORTRANNULLSCALAR(a) || FORTRANNULLDOUBLE(a) || FORTRANNULLREAL(a) || FORTRANNULLINTEGER(a) || FORTRANNULLBOOL(a) || FORTRANNULLCHARACTER(a) || FORTRANNULLMPICOMM(a)) { \
183       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Use PETSC_NULL_FUNCTION"); \
184       *ierr = PETSC_ERR_ARG_BADPTR; \
185       return; \
186     } \
187   } while (0)
188 
189 #define CHKFORTRANNULLMPICOMM(a) \
190   do { \
191     if (FORTRANNULLMPICOMM(a)) { \
192       a = PETSC_NULLPTR; \
193     } else if (FORTRANNULLINTEGER(a) || FORTRANNULLDOUBLE(a) || FORTRANNULLSCALAR(a) || FORTRANNULLREAL(a) || FORTRANNULLBOOL(a) || FORTRANNULLFUNCTION(a) || FORTRANNULLCHARACTER(a)) { \
194       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Use PETSC_NULL_MPI_COMM"); \
195       *ierr = PETSC_ERR_ARG_BADPTR; \
196       return; \
197     } \
198   } while (0)
199 
200 /* In the beginning of Fortran XxxCreate() ensure object is not NULL or already created */
201 #define PETSC_FORTRAN_OBJECT_CREATE(a) \
202   do { \
203     if (!(*(void **)a)) { \
204       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Cannot create PETSC_NULL_XXX object"); \
205       *ierr = PETSC_ERR_ARG_WRONG; \
206       return; \
207     } else if (*((void **)(a)) != (void *)-2 && *((void **)(a)) != (void *)-3) { \
208       *ierr = PetscError(PETSC_COMM_SELF, __LINE__, PETSC_FUNCTION_NAME, __FILE__, PETSC_ERR_ARG_WRONG, PETSC_ERROR_INITIAL, "Cannot create already existing object"); \
209       *ierr = PETSC_ERR_ARG_WRONG; \
210       return; \
211     } \
212   } while (0)
213 
214 /*
215   In the beginning of Fortran XxxDestroy(a), if the input object was destroyed, change it to a PETSc C NULL object so that it won't crash C XxxDestory()
216   If it is PETSC_NULL_XXX just return since these objects cannot be destroyed
217 */
218 #define PETSC_FORTRAN_OBJECT_F_DESTROYED_TO_C_NULL(a) \
219   do { \
220     if (!*(void **)a || *((void **)(a)) == (void *)-2 || *((void **)(a)) == (void *)-3) { \
221       *ierr = PETSC_SUCCESS; \
222       return; \
223     } \
224   } while (0)
225 
226 /* After C XxxDestroy(a) is called, change a's state from NULL to destroyed, so that it can be used/destroyed again by Fortran.
227    E.g., in VecScatterCreateToAll(x,vscat,seq,ierr), if seq = PETSC_NULL_VEC, PETSc won't create seq. But if seq is a
228    destroyed object (e.g., as a result of a previous Fortran VecDestroy), PETSc will create seq.
229 */
230 #define PETSC_FORTRAN_OBJECT_C_NULL_TO_F_DESTROYED(a) \
231   do { \
232     *((void **)(a)) = (void *)-2; \
233   } while (0)
234 
235 /*
236     Variable type where we stash PETSc object pointers in Fortran.
237 */
238 typedef PETSC_UINTPTR_T PetscFortranAddr;
239 
240 /*
241     These are used to support the default viewers that are
242   created at run time, in C using the , trick.
243 
244     The numbers here must match the numbers in include/petsc/finclude/petscsys.h
245 */
246 #define PETSC_VIEWER_DRAW_WORLD_FORTRAN   4
247 #define PETSC_VIEWER_DRAW_SELF_FORTRAN    5
248 #define PETSC_VIEWER_SOCKET_WORLD_FORTRAN 6
249 #define PETSC_VIEWER_SOCKET_SELF_FORTRAN  7
250 #define PETSC_VIEWER_STDOUT_WORLD_FORTRAN 8
251 #define PETSC_VIEWER_STDOUT_SELF_FORTRAN  9
252 #define PETSC_VIEWER_STDERR_WORLD_FORTRAN 10
253 #define PETSC_VIEWER_STDERR_SELF_FORTRAN  11
254 #define PETSC_VIEWER_BINARY_WORLD_FORTRAN 12
255 #define PETSC_VIEWER_BINARY_SELF_FORTRAN  13
256 #define PETSC_VIEWER_MATLAB_WORLD_FORTRAN 14
257 #define PETSC_VIEWER_MATLAB_SELF_FORTRAN  15
258 
259 #include <petscviewer.h>
260 
261 static inline PetscViewer PetscPatchDefaultViewers(PetscViewer *v)
262 {
263   if (!v) return PETSC_NULLPTR;
264   if (!(*(void **)v)) return PETSC_NULLPTR;
265   switch (*(PetscFortranAddr *)v) {
266   case PETSC_VIEWER_DRAW_WORLD_FORTRAN:
267     return PETSC_VIEWER_DRAW_WORLD;
268   case PETSC_VIEWER_DRAW_SELF_FORTRAN:
269     return PETSC_VIEWER_DRAW_SELF;
270 
271   case PETSC_VIEWER_STDOUT_WORLD_FORTRAN:
272     return PETSC_VIEWER_STDOUT_WORLD;
273   case PETSC_VIEWER_STDOUT_SELF_FORTRAN:
274     return PETSC_VIEWER_STDOUT_SELF;
275 
276   case PETSC_VIEWER_STDERR_WORLD_FORTRAN:
277     return PETSC_VIEWER_STDERR_WORLD;
278   case PETSC_VIEWER_STDERR_SELF_FORTRAN:
279     return PETSC_VIEWER_STDERR_SELF;
280 
281   case PETSC_VIEWER_BINARY_WORLD_FORTRAN:
282     return PETSC_VIEWER_BINARY_WORLD;
283   case PETSC_VIEWER_BINARY_SELF_FORTRAN:
284     return PETSC_VIEWER_BINARY_SELF;
285 
286 #if defined(PETSC_HAVE_MATLAB)
287   case PETSC_VIEWER_MATLAB_SELF_FORTRAN:
288     return PETSC_VIEWER_MATLAB_SELF;
289   case PETSC_VIEWER_MATLAB_WORLD_FORTRAN:
290     return PETSC_VIEWER_MATLAB_WORLD;
291 #endif
292 
293 #if defined(PETSC_USE_SOCKET_VIEWER)
294   case PETSC_VIEWER_SOCKET_WORLD_FORTRAN:
295     return PETSC_VIEWER_SOCKET_WORLD;
296   case PETSC_VIEWER_SOCKET_SELF_FORTRAN:
297     return PETSC_VIEWER_SOCKET_SELF;
298 #endif
299 
300   default:
301     return *v;
302   }
303 }
304 
305 #if defined(PETSC_USE_SOCKET_VIEWER)
306   #define PetscPatchDefaultViewers_Fortran_Socket(vin, v) \
307     } \
308     else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_SOCKET_WORLD_FORTRAN) \
309     { \
310       v = PETSC_VIEWER_SOCKET_WORLD; \
311     } \
312     else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_SOCKET_SELF_FORTRAN) \
313     { \
314       v = PETSC_VIEWER_SOCKET_SELF
315 #else
316   #define PetscPatchDefaultViewers_Fortran_Socket(vin, v)
317 #endif
318 
319 #define PetscPatchDefaultViewers_Fortran(vin, v) \
320   do { \
321     if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_DRAW_WORLD_FORTRAN) { \
322       v = PETSC_VIEWER_DRAW_WORLD; \
323     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_DRAW_SELF_FORTRAN) { \
324       v = PETSC_VIEWER_DRAW_SELF; \
325     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_STDOUT_WORLD_FORTRAN) { \
326       v = PETSC_VIEWER_STDOUT_WORLD; \
327     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_STDOUT_SELF_FORTRAN) { \
328       v = PETSC_VIEWER_STDOUT_SELF; \
329     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_STDERR_WORLD_FORTRAN) { \
330       v = PETSC_VIEWER_STDERR_WORLD; \
331     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_STDERR_SELF_FORTRAN) { \
332       v = PETSC_VIEWER_STDERR_SELF; \
333     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_BINARY_WORLD_FORTRAN) { \
334       v = PETSC_VIEWER_BINARY_WORLD; \
335     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_BINARY_SELF_FORTRAN) { \
336       v = PETSC_VIEWER_BINARY_SELF; \
337     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_MATLAB_WORLD_FORTRAN) { \
338       v = PETSC_VIEWER_BINARY_WORLD; \
339     } else if ((*(PetscFortranAddr *)vin) == PETSC_VIEWER_MATLAB_SELF_FORTRAN) { \
340       v = PETSC_VIEWER_BINARY_SELF; \
341       PetscPatchDefaultViewers_Fortran_Socket(vin, v); \
342     } else { \
343       v = *vin; \
344     } \
345   } while (0)
346 
347 /*
348       Allocates enough space to store Fortran function pointers in PETSc object
349    that are needed by the Fortran interface.
350 */
351 #define PetscObjectAllocateFortranPointers(obj, N) \
352   do { \
353     if (!((PetscObject)(obj))->fortran_func_pointers) { \
354       *ierr = PetscCalloc((N) * sizeof(void (*)(void)), &((PetscObject)(obj))->fortran_func_pointers); \
355       if (*ierr) return; \
356       ((PetscObject)obj)->num_fortran_func_pointers = (N); \
357     } \
358   } while (0)
359 
360 #define PetscCallFortranVoidFunction(...) \
361   do { \
362     PetscErrorCode ierr = PETSC_SUCCESS; \
363     /* the function may or may not access ierr */ \
364     __VA_ARGS__; \
365     PetscCall(ierr); \
366   } while (0)
367 
368 /* Entire function body, _ctx is a "special" variable that can be passed along */
369 #define PetscObjectUseFortranCallback_Private(obj, cid, types, args, cbclass) \
370   do { \
371     void(*func) types, *_ctx; \
372     PetscFunctionBegin; \
373     PetscCall(PetscObjectGetFortranCallback((PetscObject)(obj), (cbclass), (cid), (PetscVoidFn **)&func, &_ctx)); \
374     if (func) PetscCallFortranVoidFunction((*func)args); \
375     PetscFunctionReturn(PETSC_SUCCESS); \
376   } while (0)
377 #define PetscObjectUseFortranCallback(obj, cid, types, args)        PetscObjectUseFortranCallback_Private(obj, cid, types, args, PETSC_FORTRAN_CALLBACK_CLASS)
378 #define PetscObjectUseFortranCallbackSubType(obj, cid, types, args) PetscObjectUseFortranCallback_Private(obj, cid, types, args, PETSC_FORTRAN_CALLBACK_SUBTYPE)
379 
380 /* Disable deprecation warnings while building Fortran wrappers */
381 #undef PETSC_DEPRECATED_OBJECT
382 #define PETSC_DEPRECATED_OBJECT(...)
383 #undef PETSC_DEPRECATED_FUNCTION
384 #define PETSC_DEPRECATED_FUNCTION(...)
385 #undef PETSC_DEPRECATED_ENUM
386 #define PETSC_DEPRECATED_ENUM(...)
387 #undef PETSC_DEPRECATED_TYPEDEF
388 #define PETSC_DEPRECATED_TYPEDEF(...)
389 #undef PETSC_DEPRECATED_MACRO
390 #define PETSC_DEPRECATED_MACRO(...)
391 
392 /* PGI compilers pass in f90 pointers as 2 arguments */
393 #if defined(PETSC_HAVE_F90_2PTR_ARG)
394   #define PETSC_F90_2PTR_PROTO_NOVAR , void *
395   #define PETSC_F90_2PTR_PROTO(ptr)  , void *ptr
396   #define PETSC_F90_2PTR_PARAM(ptr)  , ptr
397 #else
398   #define PETSC_F90_2PTR_PROTO_NOVAR
399   #define PETSC_F90_2PTR_PROTO(ptr)
400   #define PETSC_F90_2PTR_PARAM(ptr)
401 #endif
402 
403 typedef struct {
404   char dummy;
405 } F90Array1d;
406 typedef struct {
407   char dummy;
408 } F90Array2d;
409 typedef struct {
410   char dummy;
411 } F90Array3d;
412 typedef struct {
413   char dummy;
414 } F90Array4d;
415 
416 PETSC_EXTERN PetscErrorCode F90Array1dCreate(void *, MPI_Datatype, PetscInt, PetscInt, F90Array1d *PETSC_F90_2PTR_PROTO_NOVAR);
417 PETSC_EXTERN PetscErrorCode F90Array1dAccess(F90Array1d *, MPI_Datatype, void **PETSC_F90_2PTR_PROTO_NOVAR);
418 PETSC_EXTERN PetscErrorCode F90Array1dDestroy(F90Array1d *, MPI_Datatype PETSC_F90_2PTR_PROTO_NOVAR);
419 
420 PETSC_EXTERN PetscErrorCode F90Array2dCreate(void *, MPI_Datatype, PetscInt, PetscInt, PetscInt, PetscInt, F90Array2d *PETSC_F90_2PTR_PROTO_NOVAR);
421 PETSC_EXTERN PetscErrorCode F90Array2dAccess(F90Array2d *, MPI_Datatype, void **PETSC_F90_2PTR_PROTO_NOVAR);
422 PETSC_EXTERN PetscErrorCode F90Array2dDestroy(F90Array2d *, MPI_Datatype PETSC_F90_2PTR_PROTO_NOVAR);
423 
424 PETSC_EXTERN PetscErrorCode F90Array3dCreate(void *, MPI_Datatype, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, F90Array3d *PETSC_F90_2PTR_PROTO_NOVAR);
425 PETSC_EXTERN PetscErrorCode F90Array3dAccess(F90Array3d *, MPI_Datatype, void **PETSC_F90_2PTR_PROTO_NOVAR);
426 PETSC_EXTERN PetscErrorCode F90Array3dDestroy(F90Array3d *, MPI_Datatype PETSC_F90_2PTR_PROTO_NOVAR);
427 
428 PETSC_EXTERN PetscErrorCode F90Array4dCreate(void *, MPI_Datatype, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, PetscInt, F90Array4d *PETSC_F90_2PTR_PROTO_NOVAR);
429 PETSC_EXTERN PetscErrorCode F90Array4dAccess(F90Array4d *, MPI_Datatype, void **PETSC_F90_2PTR_PROTO_NOVAR);
430 PETSC_EXTERN PetscErrorCode F90Array4dDestroy(F90Array4d *, MPI_Datatype PETSC_F90_2PTR_PROTO_NOVAR);
431 
432 /*
433   F90Array1dCreate - Given a C pointer to a one dimensional
434   array and its length; this fills in the appropriate Fortran 90
435   pointer data structure.
436 
437   Input Parameters:
438 +   array - regular C pointer (address)
439 .   type  - DataType of the array
440 .   start - starting index of the array
441 -   len   - length of array (in items)
442 
443   Output Parameter:
444 .   ptr - Fortran 90 pointer
445 */
446