Add new Dart API call Dart_MakeIsolateRunnable(). This would allow an

runtime/vm/dart_api_impl_test.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 "include/dart_api.h"
 #include "platform/assert.h"
 #include "platform/json.h"
 #include "platform/utils.h"
 #include "vm/class_finalizer.h"
 #include "vm/dart_api_impl.h"
@@ skipping 6225 matching lines @@
   EXPECT_SUBSTRING("Exception: 321\n", Dart_GetError(result));
 
   Dart_ExitScope();
 
   // Delete the native ports.
   EXPECT(Dart_CloseNativePort(port_id1));
   EXPECT(Dart_CloseNativePort(port_id2));
 }
 
 
-static bool RunLoopTestCallback(const char* script_name,
-                                const char* main,
-                                void* data,
-                                char** error) {
+static Dart_Isolate RunLoopTestCallback(const char* script_name,
+                                        const char* main,
+                                        void* data,
+                                        char** error) {
   const char* kScriptChars =
       "import 'builtin';\n"
       "import 'dart:isolate';\n"
       "void entry() {\n"
       "  port.receive((message, replyTo) {\n"
       "    if (message) {\n"
       "      throw new Exception('MakeChildExit');\n"
       "    } else {\n"
       "      replyTo.call('hello');\n"
       "      port.close();\n"
@@ skipping 15 matching lines @@
   Dart_Isolate isolate = TestCase::CreateTestIsolate();
   ASSERT(isolate != NULL);
   Dart_EnterScope();
   Dart_Handle url = NewString(TestCase::url());
   Dart_Handle source = NewString(kScriptChars);
   Dart_Handle result = Dart_SetLibraryTagHandler(TestCase::library_handler);
   EXPECT_VALID(result);
   Dart_Handle lib = Dart_LoadScript(url, source, 0, 0);
   EXPECT_VALID(lib);
   Dart_ExitScope();
-  return true;
+  Dart_ExitIsolate();
+  bool retval = Dart_IsolateMakeRunnable(isolate);
+  EXPECT(retval);
+  return isolate;
 }
 
 
 // The error string from the last unhandled exception. This value is only
 // valid until the next Dart_ExitScope().
 static char* last_exception = NULL;
 
 
 static void RunLoopUnhandledExceptionCallback(Dart_Handle exception) {
   Dart_Handle error_string = Dart_ToString(exception);
   EXPECT_VALID(error_string);
   const char* error_text;
   Dart_Handle result = Dart_StringToCString(error_string, &error_text);
   // Duplicate the string since error text is freed when callback is finished.
   last_exception = strdup(error_text);
   EXPECT_VALID(result);
 }
 
 
 // Common code for RunLoop_Success/RunLoop_Failure.
 static void RunLoopTest(bool throw_exception_child,
                         bool throw_exception_parent) {
   Dart_IsolateCreateCallback saved = Isolate::CreateCallback();
   Isolate::SetCreateCallback(RunLoopTestCallback);
   Isolate::SetUnhandledExceptionCallback(RunLoopUnhandledExceptionCallback);
-  RunLoopTestCallback(NULL, NULL, NULL, NULL);
+  Dart_Isolate isolate = RunLoopTestCallback(NULL, NULL, NULL, NULL);
 
+  Dart_EnterIsolate(isolate);
   Dart_EnterScope();
   Dart_Handle lib = Dart_LookupLibrary(NewString(TestCase::url()));
   EXPECT_VALID(lib);
 
   Dart_Handle result;
   Dart_Handle args[2];
   args[0] = (throw_exception_child ? Dart_True() : Dart_False());
   args[1] = (throw_exception_parent ? Dart_True() : Dart_False());
   result = Dart_Invoke(lib, NewString("main"), 2, args);
   EXPECT_VALID(result);
@@ skipping 1216 matching lines @@
                                    NULL);
   int64_t value = 0;
   result = Dart_IntegerToInt64(result, &value);
   EXPECT_VALID(result);
   EXPECT_EQ(260, value);
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart