Enables clean VM shutdown.

runtime/vm/native_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_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/dart_api_message.h"
 #include "vm/dart_api_state.h"
 #include "vm/message.h"
 #include "vm/native_message_handler.h"
 #include "vm/port.h"
 #include "vm/precompiler.h"
 
 namespace dart {
 
 // --- Message sending/receiving from native code ---
 
 static uint8_t* allocator(uint8_t* ptr, intptr_t old_size, intptr_t new_size) {
   void* new_ptr = realloc(reinterpret_cast<void*>(ptr), new_size);
   return reinterpret_cast<uint8_t*>(new_ptr);
 }
 
 
-DART_EXPORT bool Dart_PostCObject(Dart_Port port_id, Dart_CObject* message) {
+static bool PostCObject(Dart_Port port_id,
+                        Dart_CObject* message,
+                        Message::Priority priority) {
   uint8_t* buffer = NULL;
   ApiMessageWriter writer(&buffer, allocator);
   bool success = writer.WriteCMessage(message);
 
   if (!success) return success;
 
   // Post the message at the given port.
   return PortMap::PostMessage(new Message(
-      port_id, buffer, writer.BytesWritten(), Message::kNormalPriority));
+      port_id, buffer, writer.BytesWritten(), priority));
 }
 
 
+DART_EXPORT bool Dart_PostCObject(Dart_Port port_id, Dart_CObject* message) {
+  return PostCObject(port_id, message, Message::kNormalPriority);
+}
+
+
+DART_EXPORT bool Dart_PostOOBCObject(Dart_Port port_id, Dart_CObject* message) {
+  return PostCObject(port_id, message, Message::kOOBPriority);
+}
+
+
 DART_EXPORT Dart_Port Dart_NewNativePort(const char* name,
                                          Dart_NativeMessageHandler handler,
                                          bool handle_concurrently) {
   if (name == NULL) {
     name = "<UnnamedNativePort>";
   }
   if (handler == NULL) {
     OS::PrintErr("%s expects argument 'handler' to be non-null.\n",
                  CURRENT_FUNC);
     return ILLEGAL_PORT;
@@ skipping 61 matching lines @@
   Dart_Handle result = Api::CheckAndFinalizePendingClasses(isolate);
   if (::Dart_IsError(result)) {
     return result;
   }
   CHECK_CALLBACK_STATE(isolate);
   Precompile(isolate, &result);
   return result;
 }
 
 }  // namespace dart