Struct std::os::wasi::io::BorrowedFd
#[repr(transparent)]pub struct BorrowedFd<'fd> { /* fields omitted */ }
A borrowed file descriptor.
This has a lifetime parameter to tie it to the lifetime of something that owns the file descriptor.
This uses repr(transparent) and has the representation of a host file descriptor, so it can be used in FFI in places where a file descriptor is passed as an argument, it is not captured or consumed, and it never has the value -1.
Implementations
impl BorrowedFd<'_>
pub unsafe fn borrow_raw_fd(fd: RawFd) -> Self
Return a BorrowedFd holding the given raw file descriptor.
Safety
The resource pointed to by fd must remain open for the duration of the returned BorrowedFd, and it must not have the value -1.
Trait Implementations
impl AsFd for BorrowedFd<'_>
fn as_fd(&self) -> BorrowedFd<'_>
Borrows the file descriptor. Read more
impl AsRawFd for BorrowedFd<'_>
fn as_raw_fd(&self) -> RawFd
Extracts the raw file descriptor. Read more
impl<'fd> Clone for BorrowedFd<'fd>
fn clone(&self) -> BorrowedFd<'fd>
Returns a copy of the value. Read more
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from source. Read more
impl Debug for BorrowedFd<'_>
fn fmt(&self, f: &mut Formatter<'_>) -> Result
Formats the value using the given formatter. Read more
impl<'fd> Copy for BorrowedFd<'fd>
Auto Trait Implementations
impl<'fd> RefUnwindSafe for BorrowedFd<'fd>
impl<'fd> Send for BorrowedFd<'fd>
impl<'fd> Sync for BorrowedFd<'fd>
impl<'fd> Unpin for BorrowedFd<'fd>
impl<'fd> UnwindSafe for BorrowedFd<'fd>
Blanket Implementations
impl<T> From<T> for T
pub fn from(t: T) -> T
Performs the conversion.
pub fn into(self) -> U
Performs the conversion.
type Owned = T
The resulting type after obtaining ownership.
pub fn to_owned(&self) -> T
Creates owned data from borrowed data, usually by cloning. Read more
pub fn clone_into(&self, target: &mut T)
toowned_clone_into #41263)recently added
Uses borrowed data to replace owned data, usually by cloning. Read more
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
Performs the conversion.
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
Performs the conversion.
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.
https://doc.rust-lang.org/std/os/wasi/io/struct.BorrowedFd.html