1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/vm/Prefs.cpp b/js/src/vm/Prefs.cpp
new file mode 100644
index 0000000000..23ba45da80
--- /dev/null
+++ b/js/src/vm/Prefs.cpp
@@ -0,0 +1,23 @@
+/* -*- 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/. */
+
+#include "js/Prefs.h"
+
+#include "js/Initialization.h"
+#include "vm/Runtime.h"
+
+// Set all static JS::Prefs fields to the default pref values.
+JS_PREF_CLASS_FIELDS_INIT;
+
+#ifdef DEBUG
+// static
+void JS::Prefs::assertCanSetStartupPref() {
+  MOZ_ASSERT(detail::libraryInitState == detail::InitState::Uninitialized,
+             "startup prefs must be set before calling JS_Init");
+  MOZ_ASSERT(!JSRuntime::hasLiveRuntimes(),
+             "startup prefs must be set before creating a JSContext");
+}
+#endif