Add Dart_Allocate to the C++ API

runtime/vm/dart_api_impl.cc

 // 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.
 
 #include "include/dart_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/bigint_operations.h"
@@ skipping 2807 matching lines @@
   if (constructor.IsConstructor()) {
     ASSERT(result.IsNull());
   } else {
     ASSERT(result.IsNull() || result.IsInstance());
     new_object ^= result.raw();
   }
   return Api::NewHandle(isolate, new_object.raw());
 }
 
 
+DART_EXPORT Dart_Handle Dart_Allocate(Dart_Handle type) {
+  Isolate* isolate = Isolate::Current();
+  DARTSCOPE(isolate);
+  CHECK_CALLBACK_STATE(isolate);
+  const Object& result = Object::Handle(isolate, Api::UnwrapHandle(type));
+
+  // Get the class to instantiate.
+  if (result.IsNull()) {
+    RETURN_TYPE_ERROR(isolate, type, Type);
+  }
+  Class& cls = Class::Handle(isolate);
+  if (result.IsType()) {
+    cls = Type::Cast(result).type_class();
+  } else if (result.IsClass()) {
+    // For backwards compatibility we allow class objects to be passed in
+    // for now. This needs to be removed once all code that uses class
+    // objects to invoke Dart_New is removed.

[siva, 2013/06/19 15:36:24]

invoke Dart_Allocate

+    cls ^= result.raw();
+  } else {
+    RETURN_TYPE_ERROR(isolate, type, Type);
+  }
+
+  // Allocate an object for the given class.
+  return Api::NewHandle(isolate, Instance::New(cls));
+}
+
+
 DART_EXPORT Dart_Handle Dart_Invoke(Dart_Handle target,
                                     Dart_Handle name,
                                     int number_of_arguments,
                                     Dart_Handle* arguments) {
   Isolate* isolate = Isolate::Current();
   DARTSCOPE(isolate);
   CHECK_CALLBACK_STATE(isolate);
 
   const String& function_name = Api::UnwrapStringHandle(isolate, name);
   if (function_name.IsNull()) {
@@ skipping 1085 matching lines @@
   }
   {
     NoGCScope no_gc;
     RawObject* raw_obj = obj.raw();
     isolate->heap()->SetPeer(raw_obj, peer);
   }
   return Api::Success();
 }
 
 }  // namespace dart