Function mpi::ffi::MPI_Send_init

pub unsafe extern fn MPI_Send_init(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