llvm/clang-tools-extra/clangd/support/ThreadsafeFS.h

//===--- ThreadsafeFS.h ------------------------------------------*- 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_CLANG_TOOLS_EXTRA_CLANGD_SUPPORT_THREADSAFEFS_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_SUPPORT_THREADSAFEFS_H

#include "Path.h"
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/Support/VirtualFileSystem.h"
#include <memory>

namespace clang {
namespace clangd {

/// Wrapper for vfs::FileSystem for use in multithreaded programs like clangd.
/// As FileSystem is not threadsafe, concurrent threads must each obtain one.
/// Implementations may choose to depend on Context::current() e.g. to implement
/// snapshot semantics. clangd will not create vfs::FileSystems for use in
/// different contexts, so either ThreadsafeFS::view or the returned FS may
/// contain this logic.
class ThreadsafeFS { … };

class RealThreadsafeFS : public ThreadsafeFS { … };

} // namespace clangd
} // namespace clang

#endif