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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.
/// An array that would be a slice if the element size was constant!
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct ArrayOfElementsWhoseSizeVariesByLinuxVersion
{
pointer: NonNull<u8>,
number_of_elements: usize,
element_size_for_this_version_of_linux: usize,
}
impl ArrayOfElementsWhoseSizeVariesByLinuxVersion
{
/// Length.
#[inline(always)]
pub fn len(&self) -> usize
{
self.number_of_elements
}
/// Is it compatible with the layout of the struct `V`?
#[inline(always)]
pub fn is_compatible_with<V: Sized>(&self) -> bool
{
self.element_size_for_this_version_of_linux <= size_of::<V>()
}
/// Get, unchecked.
#[inline(always)]
pub unsafe fn get_unchecked_safe(&self, index: usize) -> &[u8]
{
debug_assert!(index < self.number_of_elements);
from_raw_parts(self.pointer.as_ptr().add(index * self.element_size_for_this_version_of_linux), self.element_size_for_this_version_of_linux)
}
}