1 //
2 //  Copyright (C) 2015 Google, Inc.
3 //
4 //  Licensed under the Apache License, Version 2.0 (the "License");
5 //  you may not use this file except in compliance with the License.
6 //  You may obtain a copy of the License at:
7 //
8 //  http://www.apache.org/licenses/LICENSE-2.0
9 //
10 //  Unless required by applicable law or agreed to in writing, software
11 //  distributed under the License is distributed on an "AS IS" BASIS,
12 //  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 //  See the License for the specific language governing permissions and
14 //  limitations under the License.
15 //
16 
17 #include <mutex>
18 #include <string>
19 
20 #include <base/macros.h>
21 
22 namespace util {
23 
24 // A simple atomic container class for std::string.
25 class AtomicString final {
26  public:
27   explicit AtomicString(const std::string& str);
28   ~AtomicString() = default;
29 
30   std::string Get() const;
31   void Set(const std::string& str);
32 
33  private:
34   std::mutex lock_;
35   std::string str_;
36 
37   DISALLOW_COPY_AND_ASSIGN(AtomicString);
38 };
39 
40 }  // namespace util
41