xercesc/util/FlagJanitor.hpp

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 #if !defined(XERCESC_INCLUDE_GUARD_FLAGJANITOR_HPP)
0023 #define XERCESC_INCLUDE_GUARD_FLAGJANITOR_HPP
0024
0025 #include <xercesc/util/XercesDefs.hpp>
0026
0027 XERCES_CPP_NAMESPACE_BEGIN
0028
0029 template <class T> class FlagJanitor
0030 {
0031 public :
0032     // -----------------------------------------------------------------------
0033     //  Constructors and Destructor
0034     // -----------------------------------------------------------------------
0035     FlagJanitor(T* const valPtr, const T newVal);
0036     ~FlagJanitor();
0037
0038
0039     // -----------------------------------------------------------------------
0040     //  Value management methods
0041     // -----------------------------------------------------------------------
0042     void release();
0043
0044
0045 private :
0046     // -----------------------------------------------------------------------
0047     //  Unimplemented constructors and operators
0048     // -----------------------------------------------------------------------
0049     FlagJanitor();
0050     FlagJanitor(const FlagJanitor<T>&);
0051     FlagJanitor<T>& operator=(const FlagJanitor<T>&);
0052
0053
0054     // -----------------------------------------------------------------------
0055     //  Private data members
0056     //
0057     //  fOldVal
0058     //      The old value that was in the flag when we were constructed.
0059     //
0060     //  fValPtr
0061     //      A pointer to the flag that we are to restore the value of
0062     // -----------------------------------------------------------------------
0063     T   fOldVal;
0064     T*  fValPtr;
0065 };
0066
0067 XERCES_CPP_NAMESPACE_END
0068
0069 #if !defined(XERCES_TMPLSINC)
0070 #include <xercesc/util/FlagJanitor.c>
0071 #endif
0072
0073 #endif