uv_fs_fdatasync   739 src/unix/fs.c  int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
uv_fs_fdatasync  1819 src/win/fs.c   int uv_fs_fdatasync(uv_loop_t* loop, uv_fs_t* req, uv_file fd, uv_fs_cb cb) {