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 2800 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 clazz) {
+  Isolate* isolate = Isolate::Current();
+  DARTSCOPE(isolate);
+  CHECK_CALLBACK_STATE(isolate);
+  Object& result = Object::Handle(isolate);

[siva, 2013/06/18 00:52:14]

result doesn't seem to be used at all.

+
+  // Get the class to instantiate.
+  Class& cls =
+      Class::Handle(isolate, Api::UnwrapClassHandle(isolate, clazz).raw());

[siva, 2013/06/18 00:52:14]

const Class& cls = Api::UnwrapClassHandle(isolate, clazz);

+  if (cls.IsNull()) {
+    RETURN_TYPE_ERROR(isolate, clazz, Class);
+  }
+
+  return Api::NewHandle(isolate, Instance::New(cls));
+}

[siva, 2013/06/18 00:52:14]

We would also need a test for this in dart_api_impl_test.cc

[vsm, 2013/06/19 14:55:12]

I rewrote this code to also accept Types, and I added a test.

On 2013/06/18 00:52:14, siva wrote:

+
+
 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 1012 matching lines @@
   }
   {
     NoGCScope no_gc;
     RawObject* raw_obj = obj.raw();
     isolate->heap()->SetPeer(raw_obj, peer);
   }
   return Api::Success();
 }
 
 }  // namespace dart