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/*
* Copyright (c) 2011 Samsung Electronics Co., Ltd All Rights Reserved
*
* Licensed 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.
*/
/*
* @file scoped_resource.h
* @author Piotr Marcinkiewicz (p.marcinkiew@samsung.com)
* @version 1.0
* @brief This file is the implementation file of scoped resource pattern
*/
#ifndef CCHECKER_SCOPED_RESOURCE_H
#define CCHECKER_SCOPED_RESOURCE_H
#include <cchecker/dpl/noncopyable.h>
namespace CCHECKER {
template<typename ClassPolicy>
class ScopedResource :
private Noncopyable {
public:
typedef typename ClassPolicy::Type ValueType;
typedef ScopedResource<ClassPolicy> ThisType;
protected:
ValueType m_value;
public:
explicit ScopedResource(ValueType value) : m_value(value) { }
~ScopedResource()
{
ClassPolicy::Destroy(m_value);
}
ValueType Get() const
{
return m_value;
}
void Reset(ValueType value = ClassPolicy::NullValue())
{
ClassPolicy::Destroy(m_value);
m_value = value;
}
ValueType Release()
{
ValueType value = m_value;
m_value = ClassPolicy::NullValue();
return value;
}
typedef ValueType ThisType::*UnknownBoolType;
operator UnknownBoolType() const
{
return m_value == ClassPolicy::NullValue() ?
0 : //0 is valid here because it converts to false
&ThisType::m_value; //it converts to true
}
bool operator !() const
{
return m_value == ClassPolicy::NullValue();
}
};
} // namespace CCHECKER
#endif // CCHECKER_SCOPED_RESOURCE_H
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