Rotating spheres sample

runtime/bin/main.cc

Index: runtime/bin/main.cc
diff --git a/runtime/bin/main.cc b/runtime/bin/main.cc
index c464a43b21e6952e256c4861e189b8de2654f467..2aa8c440aec535d7b8bcdf7d1231b78bb966585d 100644
--- a/runtime/bin/main.cc
+++ b/runtime/bin/main.cc
@@ -548,8 +548,8 @@ static void ShutdownIsolate(void* callback_data) {
   delete isolate_data;
 }
 
-
-int main(int argc, char** argv) {
+DART_EXPORT
+int Dart_SO_Start(int argc, char** argv, Dart_Isolate* pmain_isolate) {
   char* executable_name;
   char* script_name;
   CommandLineOptions vm_options(argc);
@@ -559,6 +559,7 @@ int main(int argc, char** argv) {
   // Perform platform specific initialization.
   if (!Platform::Initialize()) {
     fprintf(stderr, "Initialization failed\n");
+    return kErrorExitCode;
   }
 
   // Parse command line arguments.
@@ -607,6 +608,7 @@ int main(int argc, char** argv) {
 
   Dart_Isolate isolate = Dart_CurrentIsolate();
   ASSERT(isolate != NULL);
+  *pmain_isolate = isolate;
   Dart_Handle result;
 
   Dart_EnterScope();
@@ -646,8 +648,25 @@ int main(int argc, char** argv) {
     DebuggerConnectionHandler::StartHandler(debug_ip, debug_port);
   }
 
+  Dart_ExitScope();
+  Dart_ExitIsolate();
+
+  return 0;
+}
+
+DART_EXPORT
+int Dart_SO_MainLoop(Dart_Isolate isolate) {
+  Dart_EnterIsolate(isolate);
+  Dart_EnterScope();
+
+  // Lookup the library of the root script.
+  Dart_Handle library = Dart_RootLibrary();
+  if (Dart_IsNull(library)) {
+    return ErrorExit("Unable to find root library\n");
+  }
+
   // Lookup and invoke the top level main function.
-  result = Dart_Invoke(library, Dart_NewString("main"), 0, NULL);
+  Dart_Handle result = Dart_Invoke(library, Dart_NewString("main"), 0, NULL);
   if (Dart_IsError(result)) {
     return ErrorExit("%s\n", Dart_GetError(result));
   }
@@ -658,6 +677,13 @@ int main(int argc, char** argv) {
   }
 
   Dart_ExitScope();
+  Dart_ExitIsolate();
+  return 0;
+}
+
+DART_EXPORT
+int Dart_SO_Finish(Dart_Isolate isolate) {
+  Dart_EnterIsolate(isolate);
   // Dump symbol information for the profiler.
   DumpPprofSymbolInfo();
   // Shutdown the isolate.
@@ -667,3 +693,19 @@ int main(int argc, char** argv) {
 
   return 0;
 }
+
+int main(int argc, char** argv) {
+  Dart_Isolate main_isolate;
+  int result = Dart_SO_Start(argc, argv, &main_isolate);
+  if (result != 0) {
+    return result;
+  }
+
+  result = Dart_SO_MainLoop(main_isolate);
+  if (result != 0) {
+    return result;
+  }
+
+  result = Dart_SO_Finish(main_isolate);
+  return result;
+}