1 //
2 //  Copyright 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 #pragma once
18 
19 #include <mutex>
20 #include <string>
21 
22 #include <base/macros.h>
23 
24 namespace util {
25 
26 // A simple atomic container class for std::string.
27 class AtomicString final {
28  public:
29   explicit AtomicString(const std::string& str);
30   ~AtomicString() = default;
31 
32   std::string Get() const;
33   void Set(const std::string& str);
34 
35  private:
36   std::mutex lock_;
37   std::string str_;
38 
39   DISALLOW_COPY_AND_ASSIGN(AtomicString);
40 };
41 
42 }  // namespace util
43