blob: 60a1f4809eae5ad8e6045ffb063536bb745b1c22 [file] [log] [blame]
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <map>
#include <memory>
#include <mutex>
#include <string>
#include <unordered_set>
#include <vector>
class Err;
class ParseNode;
class Scope;
class SourceFile;
// Provides a cache of the results of importing scopes so the results can
// be re-used rather than running the imported files multiple times.
class ImportManager {
// Does an import of the given file into the given scope. On error, sets the
// error and returns false.
bool DoImport(const SourceFile& file,
const ParseNode* node_for_err,
Scope* scope,
Err* err);
std::vector<SourceFile> GetImportedFiles() const;
struct ImportInfo;
// Protects access to imports_ and imports_in_progress_. Do not hold when
// actually executing imports.
std::mutex imports_lock_;
// Owning pointers to the scopes.
using ImportMap = std::map<SourceFile, std::unique_ptr<ImportInfo>>;
ImportMap imports_;
std::unordered_set<std::string> imports_in_progress_;
ImportManager(const ImportManager&) = delete;
ImportManager& operator=(const ImportManager&) = delete;