/home/aconway/svn/qpid/cpp/src/qpid/sys/ScopedIncrement.h

00001 #ifndef _posix_ScopedIncrement_h
00002 #define _posix_ScopedIncrement_h
00003 
00004 /*
00005  *
00006  * Copyright (c) 2006 The Apache Software Foundation
00007  *
00008  * Licensed under the Apache License, Version 2.0 (the "License");
00009  * you may not use this file except in compliance with the License.
00010  * You may obtain a copy of the License at
00011  *
00012  *    http://www.apache.org/licenses/LICENSE-2.0
00013  *
00014  * Unless required by applicable law or agreed to in writing, software
00015  * distributed under the License is distributed on an "AS IS" BASIS,
00016  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00017  * See the License for the specific language governing permissions and
00018  * limitations under the License.
00019  *
00020  */
00021 
00022 #include <boost/noncopyable.hpp>
00023 
00024 namespace qpid {
00025 namespace sys {
00026 
00028 template <class T>
00029 class ScopedIncrement : boost::noncopyable
00030 {
00031   public:
00032     ScopedIncrement(T& c) : count(c) { ++count; }
00033     ~ScopedIncrement() { --count; }
00034   private:
00035     T& count;
00036 };
00037 
00038 
00040 template <class T>
00041 class ScopedDecrement : boost::noncopyable
00042 {
00043   public:
00044     ScopedDecrement(T& c) : count(c) { value = --count; }
00045     ~ScopedDecrement() { ++count; }
00046 
00048     operator long() { return value; }
00049 
00050   private:
00051     T& count;
00052     long value;
00053 };
00054 
00055 
00056 }}
00057 
00058 
00059 #endif // _posix_ScopedIncrement_h

Generated on Tue Apr 17 14:22:03 2007 for Qpid by  doxygen 1.4.7