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1 //===--- FSProvider.h - VFS provider for ClangdServer ------------*- C++-*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #ifndef LLVM_CLANG_TOOLS_EXTRA_CLANGD_SUPPORT_FSPROVIDER_H
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10 #define LLVM_CLANG_TOOLS_EXTRA_CLANGD_SUPPORT_FSPROVIDER_H
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11
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12 #include "llvm/ADT/IntrusiveRefCntPtr.h"
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13 #include "llvm/Support/VirtualFileSystem.h"
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14
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15 namespace clang {
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16 namespace clangd {
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17
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18 // Wrapper for vfs::FileSystem for use in multithreaded programs like clangd.
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19 // As FileSystem is not threadsafe, concurrent threads must each obtain one.
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20 class FileSystemProvider {
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21 public:
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22 virtual ~FileSystemProvider() = default;
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23 /// Called by ClangdServer to obtain a vfs::FileSystem to be used for parsing.
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24 /// Context::current() will be the context passed to the clang entrypoint,
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25 /// such as addDocument(), and will also be propagated to result callbacks.
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26 /// Embedders may use this to isolate filesystem accesses.
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27 virtual llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>
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28 getFileSystem() const = 0;
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29 };
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30
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31 class RealFileSystemProvider : public FileSystemProvider {
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32 public:
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33 llvm::IntrusiveRefCntPtr<llvm::vfs::FileSystem>
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34 getFileSystem() const override;
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35 };
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36
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37 } // namespace clangd
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38 } // namespace clang
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39
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40 #endif
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