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:
AutoRestorer(T * location)13   explicit AutoRestorer(T* location)
14       : m_Location(location), m_OldValue(*location) {}
~AutoRestorer()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