Scoped recovery module for sql/

sql/scoped_attach.h

+// 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.
+
+#ifndef SQL_SCOPED_ATTACH_H_
+#define SQL_SCOPED_ATTACH_H_
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "sql/sql_export.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace sql {
+
+// Helper to automatically detach attached database when things go out
+// of scope.
+
+class Connection;
+
+// TODO(shess): Make the attach/detach code part of sql::Connection,
+// and the scoper simply calls that.
+// TODO(shess): Break transactions on detach?
+class SQL_EXPORT ScopedAttach {
+ public:
+  explicit ScopedAttach(Connection* connection);
+  ~ScopedAttach();
+
+  bool Attach(const base::FilePath& other_db_path,
+              const char* attach_as);
+  void Detach();
+
+ private:
+  Connection* db_;
+  std::string attached_as_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScopedAttach);
+};
+
+}  // namespace sql
+
+#endif  // SQL_SCOPED_ATTACH_H_