cpp/platform/impl/windows/atomic_boolean.h

// Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef PLATFORM_IMPL_WINDOWS_ATOMIC_BOOLEAN_H_
#define PLATFORM_IMPL_WINDOWS_ATOMIC_BOOLEAN_H_

#include <atomic>

#include "platform/api/atomic_boolean.h"

namespace location {
namespace nearby {
namespace windows {

// A boolean value that may be updated atomically.
class AtomicBoolean : public api::AtomicBoolean {
 public:
  ~AtomicBoolean() override = default;

  // Atomically read and return current value.
  bool Get() const override { return atomic_boolean_; };

  // Atomically exchange original value with a new one. Return previous value.
  bool Set(bool value) override { return atomic_boolean_.exchange(value); };

 private:
  std::atomic_bool atomic_boolean_;
};

}  // namespace windows
}  // namespace nearby
}  // namespace location

#endif  // PLATFORM_IMPL_WINDOWS_ATOMIC_BOOLEAN_H_