- Add a minimal implementation of Capability.

runtime/vm/object.h

 // Copyright (c) 2012, 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 VM_OBJECT_H_
 #define VM_OBJECT_H_
 
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/utils.h"
@@ skipping 6451 matching lines @@
   }
   static intptr_t NextFieldOffset() {
     // Indicates this class cannot be extended by dart code.
     return -kWordSize;
   }
 
   friend class Class;
 };
 
 
+class Capability : public Instance {
+ public:
+  uint64_t Id() const { return raw_ptr()->id_; }
+
+  static intptr_t InstanceSize() {
+    return RoundedAllocationSize(sizeof(RawCapability));
+  }
+  static RawCapability* New(uint64_t id, Heap::Space space = Heap::kNew);
+
+ private:
+  FINAL_HEAP_OBJECT_IMPLEMENTATION(Capability, Instance);
+  friend class Class;
+};
+
+
+class ReceivePort : public Instance {
+ public:
+  RawSendPort* send_port() const { return raw_ptr()->send_port_; }
+  Dart_Port Id() const { return send_port()->ptr()->id_; }
+
+  RawInstance* handler() const { return raw_ptr()->handler_; }
+  void set_handler(const Instance& value) const;
+
+  static intptr_t InstanceSize() {
+    return RoundedAllocationSize(sizeof(RawReceivePort));
+  }
+  static RawReceivePort* New(Dart_Port id, Heap::Space space = Heap::kNew);
+
+ private:
+  FINAL_HEAP_OBJECT_IMPLEMENTATION(ReceivePort, Instance);
+  friend class Class;
+};
+
+
+class SendPort : public Instance {
+ public:
+  Dart_Port Id() const { return raw_ptr()->id_; }
+
+  static intptr_t InstanceSize() {
+    return RoundedAllocationSize(sizeof(RawSendPort));
+  }
+  static RawSendPort* New(Dart_Port id, Heap::Space space = Heap::kNew);
+
+ private:
+  FINAL_HEAP_OBJECT_IMPLEMENTATION(SendPort, Instance);
+  friend class Class;
+};
+
+
 // Internal stacktrace object used in exceptions for printing stack traces.
 class Stacktrace : public Instance {
  public:
   static const int kPreallocatedStackdepth = 10;
 
   intptr_t Length() const;
 
   RawFunction* FunctionAtFrame(intptr_t frame_index) const;
 
   RawCode* CodeAtFrame(intptr_t frame_index) const;
@@ skipping 353 matching lines @@
 
 
 RawObject* MegamorphicCache::GetTargetFunction(const Array& array,
                                                intptr_t index) {
   return array.At((index * kEntryLength) + kTargetFunctionIndex);
 }
 
 }  // namespace dart
 
 #endif  // VM_OBJECT_H_