Function mpi::ffi::PMPI_Issend

pub unsafe extern fn PMPI_Issend(buf: *const c_void,
                                 count: c_int,
                                 datatype: MPI_Datatype,
                                 dest: c_int,
                                 tag: c_int,
                                 comm: MPI_Comm,
                                 request: *mut MPI_Request)
                                 -> c_int