Add m-esr52 at 52.6.0

1 files changed, 80 insertions, 0 deletions

diff --git a/dom/xslt/xpath/txResultRecycler.h b/dom/xslt/xpath/txResultRecycler.h
new file mode 100644
index 000000000..eec7d75e8
--- /dev/null
+++ b/dom/xslt/xpath/txResultRecycler.h
@@ -0,0 +1,80 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 txResultRecycler_h__
+#define txResultRecycler_h__
+
+#include "nsCOMPtr.h"
+#include "nsAutoPtr.h"
+#include "txStack.h"
+
+class txAExprResult;
+class StringResult;
+class txNodeSet;
+class txXPathNode;
+class NumberResult;
+class BooleanResult;
+
+class txResultRecycler
+{
+public:
+    txResultRecycler();
+    ~txResultRecycler();
+
+    void AddRef()
+    {
+        ++mRefCnt;
+        NS_LOG_ADDREF(this, mRefCnt, "txResultRecycler", sizeof(*this));
+    }
+    void Release()
+    {
+        --mRefCnt;
+        NS_LOG_RELEASE(this, mRefCnt, "txResultRecycler");
+        if (mRefCnt == 0) {
+            mRefCnt = 1; //stabilize
+            delete this;
+        }
+    }
+
+    /**
+     * Returns an txAExprResult to this recycler for reuse.
+     * @param aResult  result to recycle
+     */
+    void recycle(txAExprResult* aResult);
+
+    /**
+     * Functions to return results that will be fully used by the caller.
+     * Returns nullptr on out-of-memory and an inited result otherwise.
+     */
+    nsresult getStringResult(StringResult** aResult);
+    nsresult getStringResult(const nsAString& aValue, txAExprResult** aResult);
+    nsresult getNodeSet(txNodeSet** aResult);
+    nsresult getNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);
+    nsresult getNodeSet(const txXPathNode& aNode, txAExprResult** aResult);
+    nsresult getNumberResult(double aValue, txAExprResult** aResult);
+
+    /**
+     * Functions to return a txAExprResult that is shared across several
+     * clients and must not be modified. Never returns nullptr.
+     */
+    void getEmptyStringResult(txAExprResult** aResult);
+    void getBoolResult(bool aValue, txAExprResult** aResult);
+
+    /**
+     * Functions that return non-shared resultsobjects
+     */
+    nsresult getNonSharedNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);
+
+private:
+    nsAutoRefCnt mRefCnt;
+    txStack mStringResults;
+    txStack mNodeSetResults;
+    txStack mNumberResults;
+    RefPtr<StringResult> mEmptyStringResult;
+    RefPtr<BooleanResult> mTrueResult;
+    RefPtr<BooleanResult> mFalseResult;
+};
+
+#endif //txResultRecycler_h__