1 files changed, 32 insertions, 0 deletions
diff --git a/xpcom/base/EnumeratedArrayCycleCollection.h b/xpcom/base/EnumeratedArrayCycleCollection.h
new file mode 100644
index 0000000000..465d4cf38a
--- /dev/null
+++ b/xpcom/base/EnumeratedArrayCycleCollection.h
@@ -0,0 +1,32 @@
+/* -*- 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 EnumeratedArrayCycleCollection_h_
+#define EnumeratedArrayCycleCollection_h_
+
+#include "mozilla/EnumeratedArray.h"
+#include "nsCycleCollectionTraversalCallback.h"
+
+template <typename IndexType, IndexType SizeAsEnumValue, typename ValueType>
+inline void ImplCycleCollectionUnlink(
+    mozilla::EnumeratedArray<IndexType, SizeAsEnumValue, ValueType>& aField) {
+  for (size_t i = 0; i < size_t(SizeAsEnumValue); ++i) {
+    aField[IndexType(i)] = nullptr;
+  }
+}
+
+template <typename IndexType, IndexType SizeAsEnumValue, typename ValueType>
+inline void ImplCycleCollectionTraverse(
+    nsCycleCollectionTraversalCallback& aCallback,
+    mozilla::EnumeratedArray<IndexType, SizeAsEnumValue, ValueType>& aField,
+    const char* aName, uint32_t aFlags = 0) {
+  aFlags |= CycleCollectionEdgeNameArrayFlag;
+  for (size_t i = 0; i < size_t(SizeAsEnumValue); ++i) {
+    ImplCycleCollectionTraverse(aCallback, aField[IndexType(i)], aName, aFlags);
+  }
+}
+
+#endif  // EnumeratedArrayCycleCollection_h_