#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/assert.hpp> | |
#include <boost/checked_delete.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 ): px( p.release() ) // never throws | |
{ | |
#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 // never throws | |
{ | |
return px; | |
} | |
// implicit conversion to "bool" | |
#include <boost/smart_ptr/detail/operator_bool.hpp> | |
void swap(scoped_ptr & b) // never throws | |
{ | |
T * tmp = b.px; | |
b.px = px; | |
px = tmp; | |
} | |
}; | |
template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) // never throws | |
{ | |
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) | |
{ | |
return p.get(); | |
} | |
} // namespace boost | |
#endif // #ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED |