1 files changed, 46 insertions, 0 deletions
diff --git a/dom/clients/api/ClientDOMUtil.h b/dom/clients/api/ClientDOMUtil.h
new file mode 100644
index 0000000000..a1ad6a49ed
--- /dev/null
+++ b/dom/clients/api/ClientDOMUtil.h
@@ -0,0 +1,46 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#ifndef _mozilla_dom_ClientDOMUtil_h
+#define _mozilla_dom_ClientDOMUtil_h
+
+#include "mozilla/dom/ClientIPCTypes.h"
+#include "mozilla/dom/ClientOpPromise.h"
+#include "mozilla/dom/DOMMozPromiseRequestHolder.h"
+#include "mozilla/dom/WorkerPrivate.h"
+
+class nsIGlobalObject;
+
+namespace mozilla::dom {
+
+// Utility method to properly execute a ClientManager operation.  It
+// will properly hold a worker thread alive and avoid executing callbacks
+// if the thread is shutting down.
+template <typename Func, typename Arg, typename Resolve, typename Reject>
+void StartClientManagerOp(Func aFunc, const Arg& aArg, nsIGlobalObject* aGlobal,
+                          Resolve aResolve, Reject aReject) {
+  MOZ_DIAGNOSTIC_ASSERT(aGlobal);
+
+  nsCOMPtr<nsISerialEventTarget> target = aGlobal->SerialEventTarget();
+  auto holder =
+      MakeRefPtr<DOMMozPromiseRequestHolder<ClientOpPromise>>(aGlobal);
+
+  aFunc(aArg, target)
+      ->Then(
+          target, __func__,
+          [aResolve, holder](const ClientOpResult& aResult) {
+            holder->Complete();
+            aResolve(aResult);
+          },
+          [aReject, holder](const CopyableErrorResult& aResult) {
+            holder->Complete();
+            aReject(aResult);
+          })
+      ->Track(*holder);
+}
+
+}  // namespace mozilla::dom
+
+#endif  // _mozilla_dom_ClientDOMUtil_h