- First step in refactoring ports with the goal of moving

runtime/vm/dart_entry.cc

 // Copyright (c) 2011, 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.
 
 #include "vm/dart_entry.h"
 
 #include "vm/class_finalizer.h"
 #include "vm/code_generator.h"
 #include "vm/compiler.h"
 #include "vm/debugger.h"
@@ skipping 475 matching lines @@
       String::Handle(isolate_lib.PrivateName(
           String::Handle(Field::GetterName(Symbols::_id()))));
   const Function& func = Function::Handle(cls.LookupDynamicFunction(func_name));
   ASSERT(!func.IsNull());
   const Array& args = Array::Handle(Array::New(1));
   args.SetAt(0, port);
   return DartEntry::InvokeFunction(func, args);
 }
 
 
-bool DartLibraryCalls::IsSendPort(const Instance& send_port) {
+bool DartLibraryCalls::IsSendPort(const Instance& obj) {
   // Get instance class.
-  const Class& cls = Class::Handle(send_port.clazz());
+  const Class& cls = Class::Handle(obj.clazz());
   // Get send port class from isolate library.
   const Library& isolate_lib = Library::Handle(Library::IsolateLibrary());
   const Class& send_port_cls = Class::Handle(
       isolate_lib.LookupClassAllowPrivate(Symbols::_SendPortImpl()));
   // Check for the same class id.
   ASSERT(!send_port_cls.IsNull());
   return cls.id() == send_port_cls.id();
 }
 
+
+bool DartLibraryCalls::IsReceivePort(const Instance& obj) {
+  // Get instance class.
+  const Class& cls = Class::Handle(obj.clazz());
+  // Get send port class from isolate library.
+  const Library& isolate_lib = Library::Handle(Library::IsolateLibrary());
+  const Class& recv_port_cls = Class::Handle(
+      isolate_lib.LookupClassAllowPrivate(Symbols::_RawReceivePortImpl()));
+  // Check for the same class id.
+  ASSERT(!recv_port_cls.IsNull());
+  return cls.id() == recv_port_cls.id();
+}
+
 }  // namespace dart