GME  13
FlagJanitor.c
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00001 /*
00002  * Licensed to the Apache Software Foundation (ASF) under one or more
00003  * contributor license agreements.  See the NOTICE file distributed with
00004  * this work for additional information regarding copyright ownership.
00005  * The ASF licenses this file to You under the Apache License, Version 2.0
00006  * (the "License"); you may not use this file except in compliance with
00007  * the License.  You may obtain a copy of the License at
00008  * 
00009  *      http://www.apache.org/licenses/LICENSE-2.0
00010  * 
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 
00018 /*
00019  * $Id: FlagJanitor.c 471747 2006-11-06 14:31:56Z amassari $
00020  */
00021 
00022 
00023 // ---------------------------------------------------------------------------
00024 //  Includes
00025 // ---------------------------------------------------------------------------
00026 #if defined(XERCES_TMPLSINC)
00027 #include <xercesc/util/FlagJanitor.hpp>
00028 #endif
00029 
00030 XERCES_CPP_NAMESPACE_BEGIN
00031 
00032 // ---------------------------------------------------------------------------
00033 //  Constructors and Destructor
00034 // ---------------------------------------------------------------------------
00035 template <class T> FlagJanitor<T>::FlagJanitor(T* const valPtr, const T newVal)
00036 :   fValPtr(valPtr)
00037 {
00038     // Store the pointer, save the org value, and store the new value    
00039     if (fValPtr)
00040     {
00041         fOldVal = *fValPtr;
00042         *fValPtr = newVal;
00043     }
00044 }
00045 
00046 template <class T> FlagJanitor<T>::~FlagJanitor()
00047 {
00048     // Restore the old value
00049     if (fValPtr)
00050         *fValPtr = fOldVal;
00051 }
00052 
00053 
00054 // ---------------------------------------------------------------------------
00055 //  Value management methods
00056 // ---------------------------------------------------------------------------
00057 template <class T> void FlagJanitor<T>::release()
00058 {
00059     fValPtr = 0;
00060 }
00061 
00062 XERCES_CPP_NAMESPACE_END