Roll forward to cl/314747126

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: Ie19e006429b138b3768e97dae971a43fdc5ef8bf

cpp/platform_v2/public/atomic_boolean.h

@@ -0,0 +1,48 @@
+// 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_V2_PUBLIC_ATOMIC_BOOLEAN_H_
+#define PLATFORM_V2_PUBLIC_ATOMIC_BOOLEAN_H_
+
+#include <memory>
+
+#include "platform_v2/api/atomic_boolean.h"
+#include "platform_v2/api/platform.h"
+
+namespace location {
+namespace nearby {
+
+// A boolean value that may be updated atomically.
+// See documentation in
+// cpp/platform_v2/api/atomic_boolean.h
+class AtomicBoolean final  : public api::AtomicBoolean {
+ public:
+  using Platform = api::ImplementationPlatform;
+  explicit AtomicBoolean(bool value = false)
+      : impl_(Platform::CreateAtomicBoolean(value)) {}
+  ~AtomicBoolean() override = default;
+  AtomicBoolean(AtomicBoolean&&) = default;
+  AtomicBoolean& operator=(AtomicBoolean&&) = default;
+
+  bool Get() const override { return impl_->Get(); }
+  bool Set(bool value) override { return impl_->Set(value); }
+
+ private:
+  std::unique_ptr<api::AtomicBoolean> impl_;
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_V2_PUBLIC_ATOMIC_BOOLEAN_H_