atomic_object.h

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// Copyright 2013 The Flutter 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 FLUTTER_FML_SYNCHRONIZATION_ATOMIC_OBJECT_H_
#define FLUTTER_FML_SYNCHRONIZATION_ATOMIC_OBJECT_H_
 
#include <mutex>
 
namespace fml {
 
// A wrapper for an object instance that can be read or written atomically.
template <typename T>
class AtomicObject {
 public:
  AtomicObject() = default;
  explicit AtomicObject(T object) : object_(object) {}
 
  T Load() const {
    std::scoped_lock lock(mutex_);
    return object_;
  }
 
  void Store(const T& object) {
    std::scoped_lock lock(mutex_);
    object_ = object;
  }
 
 private:
  mutable std::mutex mutex_;
  T object_;
};
 
}  // namespace fml
 
#endif  // FLUTTER_FML_SYNCHRONIZATION_ATOMIC_OBJECT_H_