75 lines
1.9 KiB
Rust
75 lines
1.9 KiB
Rust
//! The `Errno` type, which is a minimal wrapper around an error code.
|
|
//!
|
|
//! We define the error constants as individual `const`s instead of an enum
|
|
//! because we may not know about all of the host's error values and we don't
|
|
//! want unrecognized values to create undefined behavior.
|
|
|
|
use crate::backend;
|
|
#[cfg(all(not(feature = "std"), error_in_core))]
|
|
use core::error;
|
|
use core::{fmt, result};
|
|
#[cfg(feature = "std")]
|
|
use std::error;
|
|
|
|
/// A specialized [`Result`] type for `rustix` APIs.
|
|
pub type Result<T> = result::Result<T, Errno>;
|
|
|
|
pub use backend::io::errno::Errno;
|
|
|
|
impl Errno {
|
|
/// Shorthand for `std::io::Error::from(self).kind()`.
|
|
#[cfg(feature = "std")]
|
|
#[inline]
|
|
pub fn kind(self) -> std::io::ErrorKind {
|
|
std::io::Error::from(self).kind()
|
|
}
|
|
}
|
|
|
|
impl fmt::Display for Errno {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
#[cfg(feature = "std")]
|
|
{
|
|
std::io::Error::from(*self).fmt(f)
|
|
}
|
|
#[cfg(not(feature = "std"))]
|
|
{
|
|
write!(f, "os error {}", self.raw_os_error())
|
|
}
|
|
}
|
|
}
|
|
|
|
impl fmt::Debug for Errno {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
#[cfg(feature = "std")]
|
|
{
|
|
std::io::Error::from(*self).fmt(f)
|
|
}
|
|
#[cfg(not(feature = "std"))]
|
|
{
|
|
write!(f, "os error {}", self.raw_os_error())
|
|
}
|
|
}
|
|
}
|
|
|
|
#[cfg(any(feature = "std", error_in_core))]
|
|
impl error::Error for Errno {}
|
|
|
|
#[cfg(feature = "std")]
|
|
impl From<Errno> for std::io::Error {
|
|
#[inline]
|
|
fn from(err: Errno) -> Self {
|
|
Self::from_raw_os_error(err.raw_os_error() as _)
|
|
}
|
|
}
|
|
|
|
/// Call `f` until it either succeeds or fails other than [`Errno::INTR`].
|
|
#[inline]
|
|
pub fn retry_on_intr<T, F: FnMut() -> Result<T>>(mut f: F) -> Result<T> {
|
|
loop {
|
|
match f() {
|
|
Err(Errno::INTR) => (),
|
|
result => return result,
|
|
}
|
|
}
|
|
}
|