1 // Copyright 2017 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef CORE_FXCRT_AUTORESTORER_H_ 6 #define CORE_FXCRT_AUTORESTORER_H_ 7 8 namespace fxcrt { 9 10 template <typename T> 11 class AutoRestorer { 12 public: 13 explicit AutoRestorer(T* location) 14 : m_Location(location), m_OldValue(*location) {} 15 ~AutoRestorer() { *m_Location = m_OldValue; } 16 17 private: 18 T* const m_Location; 19 const T m_OldValue; 20 }; 21 22 } // namespace fxcrt 23 24 using fxcrt::AutoRestorer; 25 26 #endif // CORE_FXCRT_AUTORESTORER_H_ 27
