V8 Microtask Queue & API

src/runtime.cc

Index: src/runtime.cc
diff --git a/src/runtime.cc b/src/runtime.cc
index 333a2dc4b4346bc479b5e335e14bb1bdb3d96199..c2c4ced09071120221f0e580d827ffca95d862b6 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -14600,6 +14600,19 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_RunMicrotasks) {
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_RunExternalMicrotask) {
+  SealHandleScope shs(isolate);
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_CHECKED(Object, handler, 0);
+  v8::MicrotaskCallback callback = v8::ToCData<v8::MicrotaskCallback>(handler);
+  {
+    VMState<EXTERNAL> state(isolate);
+    callback();
+  }
+  return isolate->heap()->undefined_value();
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_GetObservationState) {
   SealHandleScope shs(isolate);
   ASSERT(args.length() == 0);