linux-support 0.0.25

Comprehensive Linux support for namespaces, cgroups, processes, scheduling, parsing /proc, parsing /sys, signals, hyper threads, CPUS, NUMA nodes, unusual file descriptors, PCI devices and much, much more
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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.


/// Advisory whole-file lock types.
///
/// Converting a lock (shared to exclusive, or vice versa) is not guaranteed to be atomic: the existing lock is first removed, and then a new lock is established.
/// Between these two steps, a pending lock request by another process may be granted, with the result that the conversion either blocks, or fails if using a non-blocking variant.
///
/// These *MAY NOT WORK* on files on NFS shares and non-local file systems; Linux kernel support is inconsistent and difficult to deduce.
#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
#[repr(i32)]
#[deprecated]
pub enum AdvisoryWholeFileLock
{
	/// Shared.
	///
	/// More than one process may hold a shared lock for a given file descriptor and its duplicates at a given time.
	///
	/// Also known as a read lock.
	#[deprecated]
	Shared = LOCK_SH,

	/// Exclusive.
	///
	/// Only one process may hold an exclusive lock for a given file descriptor and its duplicates at a given time.
	///
	/// Also known as a write lock.
	#[deprecated]
	Exclusive = LOCK_EX,
}