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// This file is part of linux-support. It is subject to the license terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT. No part of linux-support, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2020 The developers of linux-support. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/linux-support/master/COPYRIGHT.
/// Error submitting I/O requests.
#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub enum SubmitError
{
/// The kernel was unable to allocate memory for the request, or otherwise ran out of resources to handle it.
///
/// The application should wait for some completions and try again.
TryAgain,
/// The application is attempting to overcommit the number of requests it can have pending.
///
/// The application should wait for some completions and try again.
///
/// May occur if the application tries to queue more requests than there is room for in the Completion Queue (CQ) ring.
Busy,
}
impl Display for SubmitError
{
#[inline(always)]
fn fmt(&self, f: &mut Formatter) -> fmt::Result
{
Debug::fmt(self, f)
}
}
impl error::Error for SubmitError
{
#[inline(always)]
fn source(&self) -> Option<&(dyn error::Error + 'static)>
{
use self::SubmitError::*;
match self
{
&TryAgain => None,
&Busy => None,
}
}
}