Release based on cl/313536507.

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I83ec7dee1a7ef6f4bdfd47482c94d03910525b7e

cpp/platform/impl/shared/atomic_boolean_impl.h

@@ -0,0 +1,47 @@
+// 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_SHARED_ATOMIC_BOOLEAN_IMPL_H_
+#define PLATFORM_IMPL_SHARED_ATOMIC_BOOLEAN_IMPL_H_
+
+#include <atomic>
+
+#include "platform/api/atomic_boolean.h"
+
+namespace location {
+namespace nearby {
+
+class AtomicBooleanImpl : public AtomicBoolean {
+ public:
+  explicit AtomicBooleanImpl(bool initial_value) : value_(initial_value) {}
+  ~AtomicBooleanImpl() override = default;
+
+  // AtomicBoolean:
+  bool get() override {
+    return value_.load();
+  }
+
+  // AtomicBoolean:
+  void set(bool value) override {
+    value_.store(value);
+  }
+
+ private:
+  std::atomic_bool value_;
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_IMPL_SHARED_ATOMIC_BOOLEAN_IMPL_H_