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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.
/// Access pattern advice.
///
/// Default is `Normal`.
#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[repr(i32)]
pub enum Advice
{
/// Indicates that the application has no advice to give about its access pattern for the specified data.
///
/// If no advice is given for an open file, this is the default assumption.
Normal = POSIX_FADV_NORMAL,
/// The application expects to access the specified data sequentially (with lower offsets read before higher ones).
Sequential = POSIX_FADV_SEQUENTIAL,
/// The specified data will be accessed in random order.
Random = POSIX_FADV_RANDOM,
/// The specified data will be accessed only once.
NoReuse = POSIX_FADV_NOREUSE,
/// The specified data will be accessed in the near future.
WillNeed = POSIX_FADV_WILLNEED,
/// The specified data will not be accessed in the near future.
WillNotNeed = POSIX_FADV_DONTNEED,
}
impl Default for Advice
{
#[inline(always)]
fn default() -> Self
{
Advice::Normal
}
}