sl@0: #ifndef BOOST_SCOPED_PTR_HPP_INCLUDED
sl@0: #define BOOST_SCOPED_PTR_HPP_INCLUDED
sl@0: 
sl@0: //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
sl@0: //  Copyright (c) 2001, 2002 Peter Dimov
sl@0: //
sl@0: //  Distributed under the Boost Software License, Version 1.0. (See
sl@0: //  accompanying file LICENSE_1_0.txt or copy at
sl@0: //  http://www.boost.org/LICENSE_1_0.txt)
sl@0: //
sl@0: //  http://www.boost.org/libs/smart_ptr/scoped_ptr.htm
sl@0: //
sl@0: 
sl@0: #include <boost/assert.hpp>
sl@0: #include <boost/checked_delete.hpp>
sl@0: #include <boost/detail/workaround.hpp>
sl@0: 
sl@0: #ifndef BOOST_NO_AUTO_PTR
sl@0: # include <memory>          // for std::auto_ptr
sl@0: #endif
sl@0: 
sl@0: namespace boost
sl@0: {
sl@0: 
sl@0: // Debug hooks
sl@0: 
sl@0: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
sl@0: 
sl@0: void sp_scalar_constructor_hook(void * p);
sl@0: void sp_scalar_destructor_hook(void * p);
sl@0: 
sl@0: #endif
sl@0: 
sl@0: //  scoped_ptr mimics a built-in pointer except that it guarantees deletion
sl@0: //  of the object pointed to, either on destruction of the scoped_ptr or via
sl@0: //  an explicit reset(). scoped_ptr is a simple solution for simple needs;
sl@0: //  use shared_ptr or std::auto_ptr if your needs are more complex.
sl@0: 
sl@0: template<class T> class scoped_ptr // noncopyable
sl@0: {
sl@0: private:
sl@0: 
sl@0:     T * ptr;
sl@0: 
sl@0:     scoped_ptr(scoped_ptr const &);
sl@0:     scoped_ptr & operator=(scoped_ptr const &);
sl@0: 
sl@0:     typedef scoped_ptr<T> this_type;
sl@0: 
sl@0: public:
sl@0: 
sl@0:     typedef T element_type;
sl@0: 
sl@0:     explicit scoped_ptr(T * p = 0): ptr(p) // never throws
sl@0:     {
sl@0: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
sl@0:         boost::sp_scalar_constructor_hook(ptr);
sl@0: #endif
sl@0:     }
sl@0: 
sl@0: #ifndef BOOST_NO_AUTO_PTR
sl@0: 
sl@0:     explicit scoped_ptr(std::auto_ptr<T> p): ptr(p.release()) // never throws
sl@0:     {
sl@0: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
sl@0:         boost::sp_scalar_constructor_hook(ptr);
sl@0: #endif
sl@0:     }
sl@0: 
sl@0: #endif
sl@0: 
sl@0:     ~scoped_ptr() // never throws
sl@0:     {
sl@0: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
sl@0:         boost::sp_scalar_destructor_hook(ptr);
sl@0: #endif
sl@0:         boost::checked_delete(ptr);
sl@0:     }
sl@0: 
sl@0:     void reset(T * p = 0) // never throws
sl@0:     {
sl@0:         BOOST_ASSERT(p == 0 || p != ptr); // catch self-reset errors
sl@0:         this_type(p).swap(*this);
sl@0:     }
sl@0: 
sl@0:     T & operator*() const // never throws
sl@0:     {
sl@0:         BOOST_ASSERT(ptr != 0);
sl@0:         return *ptr;
sl@0:     }
sl@0: 
sl@0:     T * operator->() const // never throws
sl@0:     {
sl@0:         BOOST_ASSERT(ptr != 0);
sl@0:         return ptr;
sl@0:     }
sl@0: 
sl@0:     T * get() const // never throws
sl@0:     {
sl@0:         return ptr;
sl@0:     }
sl@0: 
sl@0:     // implicit conversion to "bool"
sl@0: 
sl@0: #if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)
sl@0: 
sl@0:     operator bool () const
sl@0:     {
sl@0:         return ptr != 0;
sl@0:     }
sl@0: 
sl@0: #elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
sl@0:     typedef T * (this_type::*unspecified_bool_type)() const;
sl@0:     
sl@0:     operator unspecified_bool_type() const // never throws
sl@0:     {
sl@0:         return ptr == 0? 0: &this_type::get;
sl@0:     }
sl@0: 
sl@0: #else 
sl@0:     typedef T * this_type::*unspecified_bool_type;
sl@0: 
sl@0:     operator unspecified_bool_type() const // never throws
sl@0:     {
sl@0:         return ptr == 0? 0: &this_type::ptr;
sl@0:     }
sl@0: 
sl@0: #endif
sl@0: 
sl@0:     bool operator! () const // never throws
sl@0:     {
sl@0:         return ptr == 0;
sl@0:     }
sl@0: 
sl@0:     void swap(scoped_ptr & b) // never throws
sl@0:     {
sl@0:         T * tmp = b.ptr;
sl@0:         b.ptr = ptr;
sl@0:         ptr = tmp;
sl@0:     }
sl@0: };
sl@0: 
sl@0: template<class T> inline void swap(scoped_ptr<T> & a, scoped_ptr<T> & b) // never throws
sl@0: {
sl@0:     a.swap(b);
sl@0: }
sl@0: 
sl@0: // get_pointer(p) is a generic way to say p.get()
sl@0: 
sl@0: template<class T> inline T * get_pointer(scoped_ptr<T> const & p)
sl@0: {
sl@0:     return p.get();
sl@0: }
sl@0: 
sl@0: } // namespace boost
sl@0: 
sl@0: #endif // #ifndef BOOST_SCOPED_PTR_HPP_INCLUDED