Struct kernel::file::FileDescriptorReservation

source · [−]

pub struct FileDescriptorReservation { /* private fields */ }

Expand description

A file descriptor reservation.

This allows the creation of a file descriptor in two steps: first, we reserve a slot for it, then we commit or drop the reservation. The first step may fail (e.g., the current process ran out of available slots), but commit and drop never fail (and are mutually exclusive).

Implementations

impl FileDescriptorReservation

pub fn new(flags: u32) -> Result<Self>

Creates a new file descriptor reservation.

pub fn reserved_fd(&self) -> u32

Returns the file descriptor number that was reserved.

pub fn commit(self, file: ARef<File>)

Commits the reservation.

The previously reserved file descriptor is bound to file.

Trait Implementations

impl Drop for FileDescriptorReservation

fn drop(&mut self)

Executes the destructor for this type. Read more

Auto Trait Implementations

impl RefUnwindSafe for FileDescriptorReservation

impl Send for FileDescriptorReservation

impl Sync for FileDescriptorReservation

impl Unpin for FileDescriptorReservation

impl UnwindSafe for FileDescriptorReservation

Blanket Implementations

impl<T> Any for T where
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for T where
U: From<T>,

const: unstable · source

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T, U> TryFrom<U> for T where
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

const: unstable · source

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.