Chris@16: #ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED
Chris@16: #define BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED
Chris@16: 
Chris@16: //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
Chris@16: //  Copyright (c) 2001, 2002 Peter Dimov
Chris@16: //
Chris@16: //  Distributed under the Boost Software License, Version 1.0. (See
Chris@16: //  accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt)
Chris@16: //
Chris@16: //  http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
Chris@16: //
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: #include <boost/assert.hpp>
Chris@16: #include <boost/checked_delete.hpp>
Chris@16: #include <boost/smart_ptr/detail/sp_nullptr_t.hpp>
Chris@16: #include <boost/detail/workaround.hpp>
Chris@16: 
Chris@16: #ifndef BOOST_NO_AUTO_PTR
Chris@16: # include <memory>          // for std::auto_ptr
Chris@16: #endif
Chris@16: 
Chris@16: namespace boost
Chris@16: {
Chris@16: 
Chris@16: // Debug hooks
Chris@16: 
Chris@16: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
Chris@16: 
Chris@16: void sp_scalar_constructor_hook(void * p);
Chris@16: void sp_scalar_destructor_hook(void * p);
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: //  scoped_ptr mimics a built-in pointer except that it guarantees deletion
Chris@16: //  of the object pointed to, either on destruction of the scoped_ptr or via
Chris@16: //  an explicit reset(). scoped_ptr is a simple solution for simple needs;
Chris@16: //  use shared_ptr or std::auto_ptr if your needs are more complex.
Chris@16: 
Chris@16: template<class T> class scoped_ptr // noncopyable
Chris@16: {
Chris@16: private:
Chris@16: 
Chris@16:     T * px;
Chris@16: 
Chris@16:     scoped_ptr(scoped_ptr const &);
Chris@16:     scoped_ptr & operator=(scoped_ptr const &);
Chris@16: 
Chris@16:     typedef scoped_ptr<T> this_type;
Chris@16: 
Chris@16:     void operator==( scoped_ptr const& ) const;
Chris@16:     void operator!=( scoped_ptr const& ) const;
Chris@16: 
Chris@16: public:
Chris@16: 
Chris@16:     typedef T element_type;
Chris@16: 
Chris@16:     explicit scoped_ptr( T * p = 0 ): px( p ) // never throws
Chris@16:     {
Chris@16: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
Chris@16:         boost::sp_scalar_constructor_hook( px );
Chris@16: #endif
Chris@16:     }
Chris@16: 
Chris@16: #ifndef BOOST_NO_AUTO_PTR
Chris@16: 
Chris@16:     explicit scoped_ptr( std::auto_ptr<T> p ) BOOST_NOEXCEPT : px( p.release() )
Chris@16:     {
Chris@16: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
Chris@16:         boost::sp_scalar_constructor_hook( px );
Chris@16: #endif
Chris@16:     }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16:     ~scoped_ptr() // never throws
Chris@16:     {
Chris@16: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
Chris@16:         boost::sp_scalar_destructor_hook( px );
Chris@16: #endif
Chris@16:         boost::checked_delete( px );
Chris@16:     }
Chris@16: 
Chris@16:     void reset(T * p = 0) // never throws
Chris@16:     {
Chris@16:         BOOST_ASSERT( p == 0 || p != px ); // catch self-reset errors
Chris@16:         this_type(p).swap(*this);
Chris@16:     }
Chris@16: 
Chris@16:     T & operator*() const // never throws
Chris@16:     {
Chris@16:         BOOST_ASSERT( px != 0 );
Chris@16:         return *px;
Chris@16:     }
Chris@16: 
Chris@16:     T * operator->() const // never throws
Chris@16:     {
Chris@16:         BOOST_ASSERT( px != 0 );
Chris@16:         return px;
Chris@16:     }
Chris@16: 
Chris@16:     T * get() const BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         return px;
Chris@16:     }
Chris@16: 
Chris@16: // implicit conversion to "bool"
Chris@16: #include <boost/smart_ptr/detail/operator_bool.hpp>
Chris@16: 
Chris@16:     void swap(scoped_ptr & b) BOOST_NOEXCEPT
Chris@16:     {
Chris@16:         T * tmp = b.px;
Chris@16:         b.px = px;
Chris@16:         px = tmp;
Chris@16:     }
Chris@16: };
Chris@16: 
Chris@16: #if !defined( BOOST_NO_CXX11_NULLPTR )
Chris@16: 
Chris@16: template<class T> inline bool operator==( scoped_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get() == 0;
Chris@16: }
Chris@16: 
Chris@16: template<class T> inline bool operator==( boost::detail::sp_nullptr_t, scoped_ptr<T> const & p ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get() == 0;
Chris@16: }
Chris@16: 
Chris@16: template<class T> inline bool operator!=( scoped_ptr<T> const & p, boost::detail::sp_nullptr_t ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get() != 0;
Chris@16: }
Chris@16: 
Chris@16: template<class T> inline bool operator!=( boost::detail::sp_nullptr_t, scoped_ptr<T> const & p ) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get() != 0;
Chris@16: }
Chris@16: 
Chris@16: #endif
Chris@16: 
Chris@16: template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     a.swap(b);
Chris@16: }
Chris@16: 
Chris@16: // get_pointer(p) is a generic way to say p.get()
Chris@16: 
Chris@16: template<class T> inline T * get_pointer(scoped_ptr<T> const & p) BOOST_NOEXCEPT
Chris@16: {
Chris@16:     return p.get();
Chris@16: }
Chris@16: 
Chris@16: } // namespace boost
Chris@16: 
Chris@16: #endif // #ifndef BOOST_SMART_PTR_SCOPED_PTR_HPP_INCLUDED