1 files changed, 38 insertions, 0 deletions
diff --git a/xpcom/components/GenericFactory.h b/xpcom/components/GenericFactory.h
new file mode 100644
index 0000000000..3fb2186e12
--- /dev/null
+++ b/xpcom/components/GenericFactory.h
@@ -0,0 +1,38 @@
+/* -*- 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_GenericFactory_h
+#define mozilla_GenericFactory_h
+
+#include "nsIFactory.h"
+
+namespace mozilla {
+
+/**
+ * A generic factory which uses a constructor function to create instances.
+ * This class is intended for use by the component manager and the generic
+ * module.
+ */
+class GenericFactory final : public nsIFactory {
+  ~GenericFactory() = default;
+
+ public:
+  typedef nsresult (*ConstructorProcPtr)(const nsIID& aIID, void** aResult);
+
+  NS_DECL_THREADSAFE_ISUPPORTS
+  NS_DECL_NSIFACTORY
+
+  explicit GenericFactory(ConstructorProcPtr aCtor) : mCtor(aCtor) {
+    NS_ASSERTION(mCtor, "GenericFactory with no constructor");
+  }
+
+ private:
+  ConstructorProcPtr mCtor;
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_GenericFactory_h