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#ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED
#define BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED
// (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
// Copyright (c) 2001, 2002 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
// http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
//
#include <boost/config.hpp>
#include <boost/assert.hpp>
#include <boost/checked_delete.hpp>
#include <boost/smart_ptr/detail/sp_nullptr_t.hpp>
#include <boost/detail/workaround.hpp>
#ifndef BOOST_NO_AUTO_PTR
# include <memory> // for std::auto_ptr
#endif
namespace boost
{
// Debug hooks
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
void sp_scalar_constructor_hook(void * p);
void sp_scalar_destructor_hook(void * p);
#endif
// scoped_ptr mimics a built-in pointer except that it guarantees deletion
// of the object pointed to, either on destruction of the scoped_ptr or via
// an explicit reset(). scoped_ptr is a simple solution for simple needs;
// use shared_ptr or std::auto_ptr if your needs are more complex.
template<class T> class scoped_ptr // noncopyable
{
private:
T * px;
scoped_ptr(scoped_ptr const &);
scoped_ptr & operator=(scoped_ptr const &);
typedef scoped_ptr<T> this_type;
void operator==( scoped_ptr const& ) const;
void operator!=( scoped_ptr const& ) const;
public:
typedef T element_type;
explicit scoped_ptr( T * p = 0 ): px( p ) // never throws
{
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
boost::sp_scalar_constructor_hook( px );
#endif
}
#ifndef BOOST_NO_AUTO_PTR
explicit scoped_ptr( std::auto_ptr<T> p ) BOOST_NOEXCEPT : px( p.release() )
{
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
boost::sp_scalar_constructor_hook( px );
#endif
}
#endif
~scoped_ptr() // never throws
{
#if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
boost::sp_scalar_destructor_hook( px );
#endif
boost::checked_delete( px );
}
void reset(T * p = 0) // never throws
{
BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors
this_type(p).swap(*this);
}
T & operator*() const // never throws
{
BOOST_ASSERT( px != 0 );
return *px;
}
T * operator->() const // never throws
{
BOOST_ASSERT( px != 0 );
return px;
}
T * get() const BOOST_NOEXCEPT
{
return px;
}
// implicit conversion to "bool"
#include <boost/smart_ptr/detail/operator_bool.hpp>
void swap(scoped_ptr & b) BOOST_NOEXCEPT
{
T * tmp = b.px;
b.px = px;
px = tmp;
}
};
#if !defined( BOOST_NO_CXX11_NULLPTR )
template<class T> inline bool operator==( scoped_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
{
return p.get() == 0;
}
template<class T> inline bool operator==( boost::detail::sp_nullptr_t, scoped_ptr<T> const & p ) BOOST_NOEXCEPT
{
return p.get() == 0;
}
template<class T> inline bool operator!=( scoped_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
{
return p.get() != 0;
}
template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, scoped_ptr<T> const & p ) BOOST_NOEXCEPT
{
return p.get() != 0;
}
#endif
template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) BOOST_NOEXCEPT
{
a.swap(b);
}
// get_pointer(p) is a generic way to say p.get()
template<class T> inline T * get_pointer(scoped_ptr<T> const & p) BOOST_NOEXCEPT
{
return p.get();
}
} // namespace boost
#endif // #ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED
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