- Implement hashCode and == for Capability.

runtime/lib/isolate.cc

 // 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.
 
 #include "platform/assert.h"
 #include "vm/bootstrap_natives.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_entry.h"
@@ skipping 17 matching lines @@
 }
 
 
 DEFINE_NATIVE_ENTRY(CapabilityImpl_factory, 1) {
   ASSERT(TypeArguments::CheckedHandle(arguments->NativeArgAt(0)).IsNull());
   uint64_t id = isolate->random()->NextUInt64();
   return Capability::New(id);
 }
 
 
+DEFINE_NATIVE_ENTRY(CapabilityImpl_equals, 2) {
+  GET_NON_NULL_NATIVE_ARGUMENT(Capability, recv, arguments->NativeArgAt(0));
+  GET_NON_NULL_NATIVE_ARGUMENT(Capability, other, arguments->NativeArgAt(1));
+  return (recv.Id() == other.Id()) ? Bool::True().raw() : Bool::False().raw();
+}
+
+
+DEFINE_NATIVE_ENTRY(CapabilityImpl_get_hashcode, 1) {
+  GET_NON_NULL_NATIVE_ARGUMENT(Capability, cap, arguments->NativeArgAt(0));
+  int64_t id = cap.Id();
+  int32_t hi = static_cast<int32_t>(id >> 32);
+  int32_t lo = static_cast<int32_t>(id);
+  int32_t hash = (hi ^ lo) & kSmiMax;
+  return Smi::New(hash);
+}
+
+
 DEFINE_NATIVE_ENTRY(RawReceivePortImpl_factory, 1) {
   ASSERT(TypeArguments::CheckedHandle(arguments->NativeArgAt(0)).IsNull());
   Dart_Port port_id =
       PortMap::CreatePort(arguments->isolate()->message_handler());
   return ReceivePort::New(port_id, false /* not control port */);
 }
 
 
 DEFINE_NATIVE_ENTRY(RawReceivePortImpl_get_id, 1) {
   GET_NON_NULL_NATIVE_ARGUMENT(ReceivePort, port, arguments->NativeArgAt(0));
@@ skipping 213 matching lines @@
   MessageWriter writer(&data, &allocator);
   writer.WriteMessage(msg);
 
   PortMap::PostMessage(new Message(port.Id(),
                                    data, writer.BytesWritten(),
                                    Message::kOOBPriority));
   return Object::null();
 }
 
 }  // namespace dart