Struct nix::sys::select::FdSet

#[repr(transparent)]
pub struct FdSet(_);

Available on crate feature poll only.

Contains a set of file descriptors used by select

Implementations

impl FdSet

pub fn new() -> FdSet

Create an empty FdSet

pub fn insert(&mut self, fd: RawFd)

Add a file descriptor to an FdSet

pub fn remove(&mut self, fd: RawFd)

Remove a file descriptor from an FdSet

pub fn contains(&self, fd: RawFd) -> bool

Test an FdSet for the presence of a certain file descriptor.

pub fn clear(&mut self)

Remove all file descriptors from this FdSet.

pub fn highest(&self) -> Option<RawFd>

Finds the highest file descriptor in the set.

Returns None if the set is empty.

This can be used to calculate the nfds parameter of the select function.

Example

let mut set = FdSet::new();
set.insert(4);
set.insert(9);
assert_eq!(set.highest(), Some(9));

pub fn fds(&self, highest: Option<RawFd>) -> Fds<'_>

Returns an iterator over the file descriptors in the set.

For performance, it takes an optional higher bound: the iterator will not return any elements of the set greater than the given file descriptor.

Examples

let mut set = FdSet::new();
set.insert(4);
set.insert(9);
let fds: Vec<RawFd> = set.fds(None).collect();
assert_eq!(fds, vec![4, 9]);

Trait Implementations

impl Clone for FdSet

fn clone(&self) -> FdSet

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FdSet

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for FdSet

fn default() -> Self

Returns the “default value” for a type.

impl Hash for FdSet

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where
    H: Hasher,
    Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<FdSet> for FdSet

fn eq(&self, other: &FdSet) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for FdSet

impl Eq for FdSet

impl StructuralEq for FdSet

impl StructuralPartialEq for FdSet