nearby: snapshot as of cl/296436629

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: I2cf5bf225b76f4c1541954651f3a7544a14e0cec

cpp/platform/api/single_thread_executor.h

@@ -0,0 +1,23 @@
+#ifndef PLATFORM_API_SINGLE_THREAD_EXECUTOR_H_
+#define PLATFORM_API_SINGLE_THREAD_EXECUTOR_H_
+
+#include "platform/api/submittable_executor.h"
+
+namespace location {
+namespace nearby {
+
+// An Executor that uses a single worker thread operating off an unbounded
+// queue.
+//
+// https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executors.html#newSingleThreadExecutor--
+template <typename ConcreteSubmittableExecutor>
+class SingleThreadExecutor :
+    public SubmittableExecutor<ConcreteSubmittableExecutor> {
+ public:
+  ~SingleThreadExecutor() override {}
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_API_SINGLE_THREAD_EXECUTOR_H_