nearby sdk refactor

PiperOrigin-RevId: 425434260

internal/platform/implementation/g3/scheduled_executor.h

@@ -0,0 +1,54 @@
+// 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_G3_SCHEDULED_EXECUTOR_H_
+#define PLATFORM_IMPL_G3_SCHEDULED_EXECUTOR_H_
+
+#include <atomic>
+#include <memory>
+
+#include "absl/time/clock.h"
+#include "internal/platform/implementation/cancelable.h"
+#include "internal/platform/implementation/scheduled_executor.h"
+#include "internal/platform/runnable.h"
+#include "internal/platform/implementation/g3/single_thread_executor.h"
+#include "nisaba/port/thread_pool.h"
+
+namespace location {
+namespace nearby {
+namespace g3 {
+
+// An Executor that reuses a fixed number of threads operating off a shared
+// unbounded queue.
+class ScheduledExecutor final : public api::ScheduledExecutor {
+ public:
+  ScheduledExecutor() = default;
+  ~ScheduledExecutor() override { executor_.Shutdown(); }
+
+  void Execute(Runnable&& runnable) override {
+    executor_.Execute(std::move(runnable));
+  }
+  std::shared_ptr<api::Cancelable> Schedule(Runnable&& runnable,
+                                            absl::Duration delay) override;
+  void Shutdown() override { executor_.Shutdown(); }
+
+ private:
+  SingleThreadExecutor executor_;
+};
+
+}  // namespace g3
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_IMPL_G3_SCHEDULED_EXECUTOR_H_