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 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