int MPI_Win_create (
    void *base, MPI_Aint size, int disp_unit,
    MPI_Info info, MPI_Comm comm, MPI_Win *win);
int MPI_Win_create_c (
    void *base, MPI_Aint size, MPI_Aint disp_unit,
    MPI_Info info, MPI_Comm comm, MPI_Win *win);

int MPI_Win_allocate (
    MPI_Aint size, int disp_unit,
    MPI_Info info, MPI_Comm comm, void *baseptr, MPI_Win *win);
int MPI_Win_allocate_c (
    MPI_Aint size, MPI_Aint disp_unit,
    MPI_Info info, MPI_Comm comm, void *baseptr, MPI_Win *win);

int MPI_Win_allocate_shared (
    MPI_Aint size, int disp_unit,
    MPI_Info info, MPI_Comm comm, void *baseptr, MPI_Win *win);
int MPI_Win_allocate_shared_c (
    MPI_Aint size, MPI_Aint disp_unit,
    MPI_Info info, MPI_Comm comm, void *baseptr, MPI_Win *win);

int MPI_Win_create_dynamic (MPI_Info info, MPI_Comm comm, MPI_Win *win);
int MPI_Win_attach (MPI_Win win, void *base, MPI_Aint size);
int MPI_Win_detach (MPI_Win win, const void *base);

int MPI_Win_free (MPI_Win *win);