teak-llvm/clang-tools-extra/clangd/FSProvider.h
Chandler Carruth 2946cd7010 Update the file headers across all of the LLVM projects in the monorepo
to reflect the new license.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351636
2019-01-19 08:50:56 +00:00

42 lines
1.5 KiB
C++

//===--- FSProvider.h - VFS provider for ClangdServer ------------*- 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_FSPROVIDER_H
#define LLVM_CLANG_TOOLS_EXTRA_CLANGD_FSPROVIDER_H
#include "llvm/ADT/IntrusiveRefCntPtr.h"
#include "llvm/Support/VirtualFileSystem.h"
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.
class FileSystemProvider {
public:
virtual ~FileSystemProvider() = default;
/// Called by ClangdServer to obtain a vfs::FileSystem to be used for parsing.
/// Context::current() will be the context passed to the clang entrypoint,
/// such as addDocument(), and will also be propagated to result callbacks.
/// Embedders may use this to isolate filesystem accesses.
virtual llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>
getFileSystem() const = 0;
};
class RealFileSystemProvider : public FileSystemProvider {
public:
// FIXME: returns the single real FS instance, which is not threadsafe.
llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>
getFileSystem() const override;
};
} // namespace clangd
} // namespace clang
#endif