1 files changed, 34 insertions, 0 deletions
diff --git a/toolkit/components/bitsdownload/Bits.cpp b/toolkit/components/bitsdownload/Bits.cpp
new file mode 100644
index 0000000000..da16e40497
--- /dev/null
+++ b/toolkit/components/bitsdownload/Bits.cpp
@@ -0,0 +1,34 @@
+/* -*- 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 "mozilla/ClearOnShutdown.h"
+#include "mozilla/StaticPtr.h"
+#include "nsCOMPtr.h"
+#include "Bits.h"
+
+// This anonymous namespace prevents outside C++ code from improperly accessing
+// these implementation details.
+namespace {
+extern "C" {
+// Implemented in Rust.
+void new_bits_service(nsIBits** result);
+}
+
+static mozilla::StaticRefPtr<nsIBits> sBitsService;
+}  // namespace
+
+already_AddRefed<nsIBits> GetBitsService() {
+  nsCOMPtr<nsIBits> bitsService;
+
+  if (sBitsService) {
+    bitsService = sBitsService;
+  } else {
+    new_bits_service(getter_AddRefs(bitsService));
+    sBitsService = bitsService;
+    mozilla::ClearOnShutdown(&sBitsService);
+  }
+
+  return bitsService.forget();
+}