xercesc/util/FlagJanitor.c

0001 /*
0002  * Licensed to the Apache Software Foundation (ASF) under one or more
0003  * contributor license agreements.  See the NOTICE file distributed with
0004  * this work for additional information regarding copyright ownership.
0005  * The ASF licenses this file to You under the Apache License, Version 2.0
0006  * (the "License"); you may not use this file except in compliance with
0007  * the License.  You may obtain a copy of the License at
0008  *
0009  *      http://www.apache.org/licenses/LICENSE-2.0
0010  *
0011  * Unless required by applicable law or agreed to in writing, software
0012  * distributed under the License is distributed on an "AS IS" BASIS,
0013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0014  * See the License for the specific language governing permissions and
0015  * limitations under the License.
0016  */
0017
0018 /*
0019  * $Id$
0020  */
0021
0022
0023 // ---------------------------------------------------------------------------
0024 //  Includes
0025 // ---------------------------------------------------------------------------
0026 #if defined(XERCES_TMPLSINC)
0027 #include <xercesc/util/FlagJanitor.hpp>
0028 #endif
0029
0030 XERCES_CPP_NAMESPACE_BEGIN
0031
0032 // ---------------------------------------------------------------------------
0033 //  Constructors and Destructor
0034 // ---------------------------------------------------------------------------
0035 template <class T> FlagJanitor<T>::FlagJanitor(T* const valPtr, const T newVal)
0036 :   fValPtr(valPtr)
0037 {
0038     // Store the pointer, save the org value, and store the new value
0039     if (fValPtr)
0040     {
0041         fOldVal = *fValPtr;
0042         *fValPtr = newVal;
0043     }
0044 }
0045
0046 template <class T> FlagJanitor<T>::~FlagJanitor()
0047 {
0048     // Restore the old value
0049     if (fValPtr)
0050         *fValPtr = fOldVal;
0051 }
0052
0053
0054 // ---------------------------------------------------------------------------
0055 //  Value management methods
0056 // ---------------------------------------------------------------------------
0057 template <class T> void FlagJanitor<T>::release()
0058 {
0059     fValPtr = 0;
0060 }
0061
0062 XERCES_CPP_NAMESPACE_END