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

00001 #ifndef _posix_AtomicCount_h
00002 #define _posix_AtomicCount_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/detail/atomic_count.hpp>
00023 #include "ScopedIncrement.h"
00024 
00025 namespace qpid {
00026 namespace sys {
00027 
00031 class AtomicCount : boost::noncopyable {
00032   public:
00033     typedef ScopedDecrement<AtomicCount> ScopedDecrement;
00034     typedef ScopedIncrement<AtomicCount> ScopedIncrement;
00035 
00036     AtomicCount(long value = 0) : count(value) {}
00037     
00038     void operator++() { ++count ; }
00039     
00040     long operator--() { return --count; }
00041     
00042     operator long() const { return count; }
00043 
00044     
00045   private:
00046     boost::detail::atomic_count  count;
00047 };
00048 
00049 
00050 }}
00051 
00052 
00053 #endif // _posix_AtomicCount_h

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