First step towards asynchronous loading of sources

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 26 matching lines @@
 #include "vm/version.h"
 
 namespace dart {
 
 DECLARE_FLAG(bool, print_class_table);
 DECLARE_FLAG(bool, verify_handles);
 DEFINE_FLAG(bool, check_function_fingerprints, false,
             "Check function fingerprints");
 DEFINE_FLAG(bool, trace_api, false,
             "Trace invocation of API calls (debug mode only)");
+DEFINE_FLAG(bool, load_async, true, "load source code asynchronously");
 
 ThreadLocalKey Api::api_native_key_ = Thread::kUnsetThreadLocalKey;
 Dart_Handle Api::true_handle_ = NULL;
 Dart_Handle Api::false_handle_ = NULL;
 Dart_Handle Api::null_handle_ = NULL;
 
 
 const char* CanonicalFunction(const char* func) {
   if (strncmp(func, "dart::", 6) == 0) {
     return func + 6;
@@ skipping 1129 matching lines @@
   return true;
 }
 
 
 DART_EXPORT bool Dart_SetVMFlags(int argc, const char** argv) {
   return Flags::ProcessCommandLineFlags(argc, argv);
 }
 
 
 DART_EXPORT bool Dart_IsVMFlagSet(const char* flag_name) {
-  if (Flags::Lookup(flag_name) != NULL) {
-    return true;
-  }
-  return false;
+  return Flags::IsSet(flag_name);
 }
 
 
 // --- Isolates ---
 
 static char* BuildIsolateName(const char* script_uri,
                               const char* main) {
   if (script_uri == NULL) {
     // Just use the main as the name.
     if (main == NULL) {
@@ skipping 3841 matching lines @@
 
 
 DART_EXPORT void Dart_RegisterRootServiceRequestCallback(
     const char* name,
     Dart_ServiceRequestCallback callback,
     void* user_data) {
   Service::RegisterRootEmbedderCallback(name, callback, user_data);
 }
 
 }  // namespace dart