Add Dart_PostPriority function to dart_api, and use it in runAsync to schedule immediate events in …

runtime/bin/builtin_natives.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 <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 
 #include "include/dart_api.h"
 
@@ skipping 45 matching lines @@
   V(File_RenameLink, 2)                                                        \
   V(File_ResolveSymbolicLinks, 1)                                              \
   V(File_OpenStdio, 1)                                                         \
   V(File_GetStdioHandleType, 1)                                                \
   V(File_GetType, 2)                                                           \
   V(File_AreIdentical, 2)                                                      \
   V(FileSystemWatcher_IsSupported, 0)                                          \
   V(FileSystemWatcher_ReadEvents, 1)                                           \
   V(FileSystemWatcher_UnwatchPath, 1)                                          \
   V(FileSystemWatcher_WatchPath, 4)                                            \
+  V(DartAPI_SendPriority, 2)                                                   \
   V(Logger_PrintString, 1)
 
 BUILTIN_NATIVE_LIST(DECLARE_FUNCTION);
 
 static struct NativeEntries {
   const char* name_;
   Dart_NativeFunction function_;
   int argument_count_;
 } BuiltinEntries[] = {
   BUILTIN_NATIVE_LIST(REGISTER_FUNCTION)
@@ skipping 32 matching lines @@
     // TODO(turnidge): Consider propagating some errors here.  What if
     // an isolate gets interrupted by the embedder in the middle of
     // Dart_StringToUTF8?  We need to make sure not to swallow the
     // interrupt.
     Platform::PrintBlocking(stdout, "%s\n", Dart_GetError(result));
   } else {
     Platform::PrintBlocking(stdout, "%.*s\n", static_cast<int>(length), chars);
   }
 }
 
+
+void FUNCTION_NAME(DartAPI_SendPriority)(Dart_NativeArguments args) {
+  Dart_Handle port = Dart_GetNativeArgument(args, 0);
+  Dart_Handle msg = Dart_GetNativeArgument(args, 1);
+  Dart_Handle id = Dart_GetField(port, DartUtils::NewString("_id"));
+  Dart_Port port_id = DartUtils::GetIntegerValue(id);
+  Dart_PostPriority(port_id, msg);
+}
+
 }  // namespace bin
 }  // namespace dart