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#ifndef _posix_AtomicCount_h
#define _posix_AtomicCount_h
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#include <boost/detail/atomic_count.hpp>
#include <boost/noncopyable.hpp>
namespace qpid {
namespace sys {
/**
* Atomic counter.
*/
class AtomicCount : boost::noncopyable {
public:
class ScopedDecrement : boost::noncopyable {
public:
/** Decrement counter in constructor and increment in destructor. */
ScopedDecrement(AtomicCount& c) : count(c) { value = --count; }
~ScopedDecrement() { ++count; }
/** Return the value returned by the decrement. */
operator long() { return value; }
private:
AtomicCount& count;
long value;
};
class ScopedIncrement : boost::noncopyable {
public:
/** Increment counter in constructor and increment in destructor. */
ScopedIncrement(AtomicCount& c) : count(c) { ++count; }
~ScopedIncrement() { --count; }
private:
AtomicCount& count;
};
AtomicCount(long value = 0) : count(value) {}
void operator++() { ++count ; }
long operator--() { return --count; }
operator long() const { return count; }
private:
boost::detail::atomic_count count;
};
}}
#endif // _posix_AtomicCount_h
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