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54 lines
1.4 KiB
C
54 lines
1.4 KiB
C
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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef TOOLS_GN_IMPORT_MANAGER_H_
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#define TOOLS_GN_IMPORT_MANAGER_H_
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#include <map>
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#include <memory>
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#include <unordered_set>
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#include <vector>
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#include "base/macros.h"
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#include "base/synchronization/lock.h"
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class Err;
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class ParseNode;
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class Scope;
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class SourceFile;
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// Provides a cache of the results of importing scopes so the results can
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// be re-used rather than running the imported files multiple times.
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class ImportManager {
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public:
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ImportManager();
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~ImportManager();
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// Does an import of the given file into the given scope. On error, sets the
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// error and returns false.
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bool DoImport(const SourceFile& file,
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const ParseNode* node_for_err,
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Scope* scope,
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Err* err);
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std::vector<SourceFile> GetImportedFiles() const;
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private:
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struct ImportInfo;
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// Protects access to imports_ and imports_in_progress_. Do not hold when
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// actually executing imports.
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base::Lock imports_lock_;
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// Owning pointers to the scopes.
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typedef std::map<SourceFile, std::unique_ptr<ImportInfo>> ImportMap;
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ImportMap imports_;
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std::unordered_set<std::string> imports_in_progress_;
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DISALLOW_COPY_AND_ASSIGN(ImportManager);
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};
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#endif // TOOLS_GN_IMPORT_MANAGER_H_
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