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//===--- 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
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