llvm/llvm/include/llvm/Support/LockFileManager.h

//===--- LockFileManager.h - File-level locking utility ---------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_SUPPORT_LOCKFILEMANAGER_H
#define LLVM_SUPPORT_LOCKFILEMANAGER_H

#include "llvm/ADT/SmallString.h"
#include <optional>
#include <system_error>
#include <utility> // for std::pair

namespace llvm {
class StringRef;

/// Class that manages the creation of a lock file to aid
/// implicit coordination between different processes.
///
/// The implicit coordination works by creating a ".lock" file alongside
/// the file that we're coordinating for, using the atomicity of the file
/// system to ensure that only a single process can create that ".lock" file.
/// When the lock file is removed, the owning process has finished the
/// operation.
class LockFileManager { … };

} // end namespace llvm

#endif // LLVM_SUPPORT_LOCKFILEMANAGER_H