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81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef txResultRecycler_h__
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#define txResultRecycler_h__
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "txStack.h"
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class txAExprResult;
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class StringResult;
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class txNodeSet;
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class txXPathNode;
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class NumberResult;
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class BooleanResult;
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class txResultRecycler
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{
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public:
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txResultRecycler();
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~txResultRecycler();
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void AddRef()
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{
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++mRefCnt;
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NS_LOG_ADDREF(this, mRefCnt, "txResultRecycler", sizeof(*this));
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}
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void Release()
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{
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--mRefCnt;
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NS_LOG_RELEASE(this, mRefCnt, "txResultRecycler");
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if (mRefCnt == 0) {
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mRefCnt = 1; //stabilize
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delete this;
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}
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}
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/**
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* Returns an txAExprResult to this recycler for reuse.
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* @param aResult result to recycle
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*/
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void recycle(txAExprResult* aResult);
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/**
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* Functions to return results that will be fully used by the caller.
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* Returns nullptr on out-of-memory and an inited result otherwise.
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*/
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nsresult getStringResult(StringResult** aResult);
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nsresult getStringResult(const nsAString& aValue, txAExprResult** aResult);
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nsresult getNodeSet(txNodeSet** aResult);
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nsresult getNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);
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nsresult getNodeSet(const txXPathNode& aNode, txAExprResult** aResult);
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nsresult getNumberResult(double aValue, txAExprResult** aResult);
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/**
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* Functions to return a txAExprResult that is shared across several
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* clients and must not be modified. Never returns nullptr.
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*/
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void getEmptyStringResult(txAExprResult** aResult);
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void getBoolResult(bool aValue, txAExprResult** aResult);
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/**
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* Functions that return non-shared resultsobjects
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*/
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nsresult getNonSharedNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);
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private:
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nsAutoRefCnt mRefCnt;
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txStack mStringResults;
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txStack mNodeSetResults;
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txStack mNumberResults;
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nsRefPtr<StringResult> mEmptyStringResult;
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nsRefPtr<BooleanResult> mTrueResult;
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nsRefPtr<BooleanResult> mFalseResult;
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};
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#endif //txResultRecycler_h__
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