1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/dom/xslt/xpath/txResultRecycler.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,80 @@
1.4 +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef txResultRecycler_h__
1.10 +#define txResultRecycler_h__
1.11 +
1.12 +#include "nsCOMPtr.h"
1.13 +#include "txStack.h"
1.14 +
1.15 +class txAExprResult;
1.16 +class StringResult;
1.17 +class txNodeSet;
1.18 +class txXPathNode;
1.19 +class NumberResult;
1.20 +class BooleanResult;
1.21 +
1.22 +class txResultRecycler
1.23 +{
1.24 +public:
1.25 + txResultRecycler();
1.26 + ~txResultRecycler();
1.27 + nsresult init();
1.28 +
1.29 + void AddRef()
1.30 + {
1.31 + ++mRefCnt;
1.32 + NS_LOG_ADDREF(this, mRefCnt, "txResultRecycler", sizeof(*this));
1.33 + }
1.34 + void Release()
1.35 + {
1.36 + --mRefCnt;
1.37 + NS_LOG_RELEASE(this, mRefCnt, "txResultRecycler");
1.38 + if (mRefCnt == 0) {
1.39 + mRefCnt = 1; //stabilize
1.40 + delete this;
1.41 + }
1.42 + }
1.43 +
1.44 + /**
1.45 + * Returns an txAExprResult to this recycler for reuse.
1.46 + * @param aResult result to recycle
1.47 + */
1.48 + void recycle(txAExprResult* aResult);
1.49 +
1.50 + /**
1.51 + * Functions to return results that will be fully used by the caller.
1.52 + * Returns nullptr on out-of-memory and an inited result otherwise.
1.53 + */
1.54 + nsresult getStringResult(StringResult** aResult);
1.55 + nsresult getStringResult(const nsAString& aValue, txAExprResult** aResult);
1.56 + nsresult getNodeSet(txNodeSet** aResult);
1.57 + nsresult getNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);
1.58 + nsresult getNodeSet(const txXPathNode& aNode, txAExprResult** aResult);
1.59 + nsresult getNumberResult(double aValue, txAExprResult** aResult);
1.60 +
1.61 + /**
1.62 + * Functions to return a txAExprResult that is shared across several
1.63 + * clients and must not be modified. Never returns nullptr.
1.64 + */
1.65 + void getEmptyStringResult(txAExprResult** aResult);
1.66 + void getBoolResult(bool aValue, txAExprResult** aResult);
1.67 +
1.68 + /**
1.69 + * Functions that return non-shared resultsobjects
1.70 + */
1.71 + nsresult getNonSharedNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);
1.72 +
1.73 +private:
1.74 + nsAutoRefCnt mRefCnt;
1.75 + txStack mStringResults;
1.76 + txStack mNodeSetResults;
1.77 + txStack mNumberResults;
1.78 + StringResult* mEmptyStringResult;
1.79 + BooleanResult* mTrueResult;
1.80 + BooleanResult* mFalseResult;
1.81 +};
1.82 +
1.83 +#endif //txResultRecycler_h__
