Function preadv64
pub unsafe extern "C" fn preadv64(fd: c_int, iov: *const iovec, iovcnt: c_int, offset: off64_t) -> ssize_tpreadv64pub unsafe extern "C" fn preadv64(fd: c_int, iov: *const iovec, iovcnt: c_int, offset: off64_t) -> ssize_t