The Tor Browser: dom/xslt/xpath/txResultRecycler.h@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

     2 /* This Source Code Form is subject to the terms of the Mozilla Public

     3  * License, v. 2.0. If a copy of the MPL was not distributed with this

     4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     6 #ifndef txResultRecycler_h__

     7 #define txResultRecycler_h__

     9 #include "nsCOMPtr.h"

    10 #include "txStack.h"

    12 class txAExprResult;

    13 class StringResult;

    14 class txNodeSet;

    15 class txXPathNode;

    16 class NumberResult;

    17 class BooleanResult;

    19 class txResultRecycler

    20 {

    21 public:

    22     txResultRecycler();

    23     ~txResultRecycler();

    24     nsresult init();

    26     void AddRef()

    27     {

    28         ++mRefCnt;

    29         NS_LOG_ADDREF(this, mRefCnt, "txResultRecycler", sizeof(*this));

    30     }

    31     void Release()

    32     {

    33         --mRefCnt;

    34         NS_LOG_RELEASE(this, mRefCnt, "txResultRecycler");

    35         if (mRefCnt == 0) {

    36             mRefCnt = 1; //stabilize

    37             delete this;

    38         }

    39     }

    41     /**

    42      * Returns an txAExprResult to this recycler for reuse.

    43      * @param aResult  result to recycle

    44      */

    45     void recycle(txAExprResult* aResult);

    47     /**

    48      * Functions to return results that will be fully used by the caller.

    49      * Returns nullptr on out-of-memory and an inited result otherwise.

    50      */

    51     nsresult getStringResult(StringResult** aResult);

    52     nsresult getStringResult(const nsAString& aValue, txAExprResult** aResult);

    53     nsresult getNodeSet(txNodeSet** aResult);

    54     nsresult getNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);

    55     nsresult getNodeSet(const txXPathNode& aNode, txAExprResult** aResult);

    56     nsresult getNumberResult(double aValue, txAExprResult** aResult);

    58     /**

    59      * Functions to return a txAExprResult that is shared across several

    60      * clients and must not be modified. Never returns nullptr.

    61      */

    62     void getEmptyStringResult(txAExprResult** aResult);

    63     void getBoolResult(bool aValue, txAExprResult** aResult);

    65     /**

    66      * Functions that return non-shared resultsobjects

    67      */

    68     nsresult getNonSharedNodeSet(txNodeSet* aNodeSet, txNodeSet** aResult);

    70 private:

    71     nsAutoRefCnt mRefCnt;

    72     txStack mStringResults;

    73     txStack mNodeSetResults;

    74     txStack mNumberResults;

    75     StringResult* mEmptyStringResult;

    76     BooleanResult* mTrueResult;

    77     BooleanResult* mFalseResult;

    78 };

    80 #endif //txResultRecycler_h__

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