Roll forward to cl/338482889

Signed-off-by: Alexey Polyudov <apolyudov@google.com>
Change-Id: Ic2bdb234e89f3c5860d1b483dd4bce689f13d057

cpp/platform/api/executor.h

@@ -15,25 +15,31 @@
 #ifndef PLATFORM_API_EXECUTOR_H_
 #define PLATFORM_API_EXECUTOR_H_
 
-#include "platform/ptr.h"
-#include "platform/runnable.h"
+#include "platform/base/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:
-  virtual ~Executor() {}
+  // 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;
+  virtual void Shutdown() = 0;
 
-  // https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Executor.html#execute-java.lang.Runnable-
-  virtual void execute(Ptr<Runnable> runnable) = 0;
+  virtual int GetTid(int index) const = 0;
 };
 
+}  // namespace api
 }  // namespace nearby
 }  // namespace location