Class AsyncResource

nan.h:585–668

// === AsyncResource ===========================================================

class AsyncResource {
 public:
  AsyncResource(
      v8::Local<v8::String> name
    , v8::Local<v8::Object> resource = New<v8::Object>()) {
#if NODE_MODULE_VERSION >= NODE_9_0_MODULE_VERSION
    v8::Isolate* isolate = v8::Isolate::GetCurrent();

    if (resource.IsEmpty()) {
      resource = New<v8::Object>();
    }

    context = node::EmitAsyncInit(isolate, resource, name);
#endif
  }

  AsyncResource(
      const char* name
    , v8::Local<v8::Object> resource = New<v8::Object>()) {
#if NODE_MODULE_VERSION >= NODE_9_0_MODULE_VERSION
    v8::Isolate* isolate = v8::Isolate::GetCurrent();

    if (resource.IsEmpty()) {
      resource = New<v8::Object>();
    }

    v8::Local<v8::String> name_string =
        New<v8::String>(name).ToLocalChecked();
    context = node::EmitAsyncInit(isolate, resource, name_string);
#endif
  }

  ~AsyncResource() {
#if NODE_MODULE_VERSION >= NODE_9_0_MODULE_VERSION
    v8::Isolate* isolate = v8::Isolate::GetCurrent();
    node::EmitAsyncDestroy(isolate, context);
#endif
  }

  inline MaybeLocal<v8::Value> runInAsyncScope(
      v8::Local<v8::Object> target
    , v8::Local<v8::Function> func
    , int argc
    , v8::Local<v8::Value>* argv) {
#if NODE_MODULE_VERSION < NODE_9_0_MODULE_VERSION
    return MakeCallback(target, func, argc, argv);
#else
    return node::MakeCallback(
        v8::Isolate::GetCurrent(), target, func, argc, argv, context);
#endif
  }

  inline MaybeLocal<v8::Value> runInAsyncScope(
      v8::Local<v8::Object> target
    , v8::Local<v8::String> symbol
    , int argc
    , v8::Local<v8::Value>* argv) {
#if NODE_MODULE_VERSION < NODE_9_0_MODULE_VERSION