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// This file is part of dpdk. 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/dpdk/master/COPYRIGHT. No part of predicator, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.
// Copyright © 2017 The developers of dpdk. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/lemonrock/dpdk/master/COPYRIGHT.


/// Transparent Huge Page (THP) defragmentation choice.
#[derive(Debug, Copy, Clone, Ord, PartialOrd, Eq, PartialEq, Hash)]
pub enum TransparentHugePageDefragmentationChoice
{
	/// Never defragment.
	Never,
	
	/// Defer defragmentation until allocation requires it.
	Defer,
	
	/// Only for pages so specified by the `madvise()` (or `fadvise()`) syscall with the `MADV_HUGEPAGE` flag.
	Advise,
	
	/// Like `Defer` and `MAdvise`.
	///
	/// Only for pages so specified by the `madvise()` (or `fadvise()`) syscall with the `MADV_HUGEPAGE` flag.
	DeferAndAdvise,
}

impl TransparentHugePageDefragmentationChoice
{
	#[inline(always)]
	pub(crate) fn to_value(self) -> &'static str
	{
		use self::TransparentHugePageDefragmentationChoice::*;
		
		match self
		{
			Never => "never",
			Defer => "defer",
			Advise => "madvise",
			DeferAndAdvise => "defer+madvise",
		}
	}
	
	#[inline(always)]
	pub(crate) fn defrag_value(self) -> &'static str
	{
		use self::TransparentHugePageDefragmentationChoice::*;
		
		match self
		{
			Never => "0",
			_ => "1",
		}
	}
}