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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.
/// A copy of a file descriptor that when dropped does not close the file descriptor.
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[repr(transparent)]
pub struct FileDescriptorCopy<FD: FileDescriptor>(ManuallyDrop<FD>);
impl<FD: FileDescriptor> Clone for FileDescriptorCopy<FD>
{
#[inline(always)]
fn clone(&self) -> Self
{
FileDescriptorCopy::new(unsafe { transmute_copy(&self.0) })
}
}
impl<FD: FileDescriptor> Into<FileDescriptorCopy<FD>> for RawFd
{
#[inline(always)]
fn into(self) -> FileDescriptorCopy<FD>
{
FileDescriptorCopy::new(self)
}
}
impl<FD: FileDescriptor> Deref for FileDescriptorCopy<FD>
{
type Target = FD;
#[inline(always)]
fn deref(&self) -> &Self::Target
{
self.0.deref()
}
}
impl<FD: FileDescriptor> DerefMut for FileDescriptorCopy<FD>
{
#[inline(always)]
fn deref_mut(&mut self) -> &mut Self::Target
{
self.0.deref_mut()
}
}
impl<FD: FileDescriptor> FileDescriptorCopy<FD>
{
#[inline(always)]
pub(crate) fn new(raw_fd: RawFd) -> Self
{
Self(ManuallyDrop::new(unsafe { FD::from_raw_fd(raw_fd) }))
}
}