First draft. Compiles. Untested.

BasicSolver/3D-mpi-io/src/comm.h

@@ -40,18 +40,7 @@ extern void commExchange(Comm*, double*);
 extern void commShift(Comm* c, double* f, double* g, double* h);
 extern void commReduction(double* v, int op);
 extern int commIsBoundary(Comm* c, Direction direction);
-extern void commCollectResult(Comm* c,
-    double* ug,
-    double* vg,
-    double* wg,
-    double* pg,
-    double* u,
-    double* v,
-    double* w,
-    double* p,
-    int kmax,
-    int jmax,
-    int imax);
+extern void commGetOffsets(Comm* c, int offsets[], int kmax, int jmax, int imax);
 
 static inline int commIsMaster(Comm* c) { return c->rank == 0; }
 #endif // __COMM_H_