nearby sdk refactor

PiperOrigin-RevId: 425434260

internal/platform/implementation/executor.h

@@ -0,0 +1,44 @@
+// 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_API_EXECUTOR_H_
+#define PLATFORM_API_EXECUTOR_H_
+
+#include "internal/platform/runnable.h"
+
+namespace location {
+namespace nearby {
+namespace api {
+
+int GetCurrentTid();
+
+// This abstract class is the superclass of all classes representing an
+// Executor.
+class Executor {
+ public:
+  // Before returning from destructor, executor must wait for all pending
+  // jobs to finish.
+  virtual ~Executor() = default;
+  // https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executor.html#execute-java.lang.Runnable-
+  virtual void Execute(Runnable&& runnable) = 0;
+
+  // https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ExecutorService.html#shutdown--
+  virtual void Shutdown() = 0;
+};
+
+}  // namespace api
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_API_EXECUTOR_H_