Add missing files from previous commit

runtime/bin/native_service.h

+// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#ifndef BIN_NATIVE_SERVICE_H_
+#define BIN_NATIVE_SERVICE_H_
+
+#include "include/dart_api.h"
+#include "platform/globals.h"
+#include "platform/thread.h"
+
+// Utility class to set up a native service and allocate Dart native
+// ports to interact with it from Dart code. The number of native ports
+// allocated for each service is limited.
+class NativeService {
+ public:
+  // Create a native service with the given name and handler. Allow
+  // the creation of [number_of_ports] native ports for the service.
+  // If GetServicePort is called more than [number_of_ports] times
+  // one of the already allocated native ports will be reused.
+  NativeService(const char* name,
+                Dart_NativeMessageHandler handler,
+                int number_of_ports);
+
+  ~NativeService();
+
+  // Get a Dart native port for this native service.
+  Dart_Port GetServicePort();
+
+ private:
+  // Name and handler for the native service.
+  const char* name_;
+  Dart_NativeMessageHandler handler_;
+
+  // Allocated native ports for the service. Mutex protected since
+  // the service can be used from multiple isolates.
+  dart::Mutex mutex_;
+  int service_ports_size_;
+  Dart_Port* service_ports_;
+  int service_ports_index_;
+
+  DISALLOW_IMPLICIT_CONSTRUCTORS(NativeService);
+};
+
+#endif  // BIN_NATIVE_SERVICE_H_