//! The [`is_read_write`] function.

#[cfg(all(feature = "fs", feature = "net"))]
use crate::{backend, io};
#[cfg(all(feature = "fs", feature = "net"))]
use backend::fd::AsFd;

/// Returns a pair of booleans indicating whether the file descriptor is
/// readable and/or writable, respectively.
///
/// Unlike [`is_file_read_write`], this correctly detects whether sockets
/// have been shutdown, partially or completely.
///
/// [`is_file_read_write`]: crate::fs::is_file_read_write
#[inline]
#[cfg(all(feature = "fs", feature = "net"))]
#[cfg_attr(doc_cfg, doc(cfg(all(feature = "fs", feature = "net"))))]
pub fn is_read_write<Fd: AsFd>(fd: Fd) -> io::Result<(bool, bool)> {
    backend::io::syscalls::is_read_write(fd.as_fd())
}
