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/****************************************************************************
* Copyright (C) from 2009 to Present EPAM Systems.
*
* This file is part of Indigo toolkit.
*
* 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.
***************************************************************************/
#ifndef __auto_ptr__
#define __auto_ptr__
#include "base_cpp/exception.h"
namespace indigo
{
DECL_EXCEPTION(AutoPtrError);
template <typename T> class AutoPtr
{
public:
explicit AutoPtr(T* ptr = 0)
{
_ptr = ptr;
}
~AutoPtr()
{
delete _ptr;
}
T* get() const
{
return _ptr;
}
T& ref() const
{
if (_ptr == 0)
throw Error("no reference");
return *_ptr;
}
T* operator->() const
{
if (_ptr == 0)
throw Error("no reference");
return _ptr;
}
T* release()
{
if (_ptr == 0)
throw Error("nothing to release");
T* ptr = _ptr;
_ptr = 0;
return ptr;
}
void reset(T* ptr)
{
if (ptr != _ptr)
{
delete _ptr;
_ptr = ptr;
}
}
void free()
{
reset(0);
}
AutoPtr<T>& operator=(T* ptr)
{
reset(ptr);
return *this;
}
void create()
{
reset(new T());
}
template <typename A> void create(A& a)
{
reset(new T(a));
}
DECL_TPL_ERROR(AutoPtrError);
protected:
T* _ptr;
private:
AutoPtr(const AutoPtr&); // no implicit copy
AutoPtr<T>& operator=(const AutoPtr<T>& other);
};
} // namespace indigo
#endif
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