1 files changed, 26 insertions, 0 deletions
diff --git a/core/fxcrt/autorestorer.h b/core/fxcrt/autorestorer.h
new file mode 100644
index 0000000000..745a56fff2
--- /dev/null
+++ b/core/fxcrt/autorestorer.h
@@ -0,0 +1,26 @@
+// Copyright 2017 PDFium 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 CORE_FXCRT_AUTORESTORER_H_
+#define CORE_FXCRT_AUTORESTORER_H_
+
+namespace fxcrt {
+
+template <typename T>
+class AutoRestorer {
+ public:
+  explicit AutoRestorer(T* location)
+      : m_Location(location), m_OldValue(*location) {}
+  ~AutoRestorer() { *m_Location = m_OldValue; }
+
+ private:
+  T* const m_Location;
+  const T m_OldValue;
+};
+
+}  // namespace fxcrt
+
+using fxcrt::AutoRestorer;
+
+#endif  // CORE_FXCRT_AUTORESTORER_H_