williamr@2: #ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED
williamr@2: #define BOOST_SCOPED_ARRAY_HPP_INCLUDED
williamr@2: 
williamr@2: //  (C) Copyright Greg Colvin and Beman Dawes 1998, 1999.
williamr@2: //  Copyright (c) 2001, 2002 Peter Dimov
williamr@2: //
williamr@2: //  Distributed under the Boost Software License, Version 1.0. (See
williamr@2: //  accompanying file LICENSE_1_0.txt or copy at
williamr@2: //  http://www.boost.org/LICENSE_1_0.txt)
williamr@2: //
williamr@2: //  http://www.boost.org/libs/smart_ptr/scoped_array.htm
williamr@2: //
williamr@2: 
williamr@2: #include <boost/assert.hpp>
williamr@2: #include <boost/checked_delete.hpp>
williamr@2: #include <boost/config.hpp>   // in case ptrdiff_t not in std
williamr@2: 
williamr@2: #include <boost/detail/workaround.hpp>
williamr@2: 
williamr@2: #include <cstddef>            // for std::ptrdiff_t
williamr@2: 
williamr@2: namespace boost
williamr@2: {
williamr@2: 
williamr@2: // Debug hooks
williamr@2: 
williamr@2: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
williamr@2: 
williamr@2: void sp_array_constructor_hook(void * p);
williamr@2: void sp_array_destructor_hook(void * p);
williamr@2: 
williamr@2: #endif
williamr@2: 
williamr@2: //  scoped_array extends scoped_ptr to arrays. Deletion of the array pointed to
williamr@2: //  is guaranteed, either on destruction of the scoped_array or via an explicit
williamr@2: //  reset(). Use shared_array or std::vector if your needs are more complex.
williamr@2: 
williamr@2: template<class T> class scoped_array // noncopyable
williamr@2: {
williamr@2: private:
williamr@2: 
williamr@2:     T * ptr;
williamr@2: 
williamr@2:     scoped_array(scoped_array const &);
williamr@2:     scoped_array & operator=(scoped_array const &);
williamr@2: 
williamr@2:     typedef scoped_array<T> this_type;
williamr@2: 
williamr@2: public:
williamr@2: 
williamr@2:     typedef T element_type;
williamr@2: 
williamr@2:     explicit scoped_array(T * p = 0) : ptr(p) // never throws
williamr@2:     {
williamr@2: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
williamr@2:         boost::sp_array_constructor_hook(ptr);
williamr@2: #endif
williamr@2:     }
williamr@2: 
williamr@2:     ~scoped_array() // never throws
williamr@2:     {
williamr@2: #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
williamr@2:         boost::sp_array_destructor_hook(ptr);
williamr@2: #endif
williamr@2:         boost::checked_array_delete(ptr);
williamr@2:     }
williamr@2: 
williamr@2:     void reset(T * p = 0) // never throws
williamr@2:     {
williamr@2:         BOOST_ASSERT(p == 0 || p != ptr); // catch self-reset errors
williamr@2:         this_type(p).swap(*this);
williamr@2:     }
williamr@2: 
williamr@2:     T & operator[](std::ptrdiff_t i) const // never throws
williamr@2:     {
williamr@2:         BOOST_ASSERT(ptr != 0);
williamr@2:         BOOST_ASSERT(i >= 0);
williamr@2:         return ptr[i];
williamr@2:     }
williamr@2: 
williamr@2:     T * get() const // never throws
williamr@2:     {
williamr@2:         return ptr;
williamr@2:     }
williamr@2: 
williamr@2:     // implicit conversion to "bool"
williamr@2: 
williamr@2: #if defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x530)
williamr@2: 
williamr@2:     operator bool () const
williamr@2:     {
williamr@2:         return ptr != 0;
williamr@2:     }
williamr@2: 
williamr@2: #elif defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, BOOST_TESTED_AT(0x3003))
williamr@2:     typedef T * (this_type::*unspecified_bool_type)() const;
williamr@2:     
williamr@2:     operator unspecified_bool_type() const // never throws
williamr@2:     {
williamr@2:         return ptr == 0? 0: &this_type::get;
williamr@2:     }
williamr@2: 
williamr@2: #else 
williamr@2: 
williamr@2:     typedef T * this_type::*unspecified_bool_type;
williamr@2: 
williamr@2:     operator unspecified_bool_type() const // never throws
williamr@2:     {
williamr@2:         return ptr == 0? 0: &this_type::ptr;
williamr@2:     }
williamr@2: 
williamr@2: #endif
williamr@2: 
williamr@2:     bool operator! () const // never throws
williamr@2:     {
williamr@2:         return ptr == 0;
williamr@2:     }
williamr@2: 
williamr@2:     void swap(scoped_array & b) // never throws
williamr@2:     {
williamr@2:         T * tmp = b.ptr;
williamr@2:         b.ptr = ptr;
williamr@2:         ptr = tmp;
williamr@2:     }
williamr@2: 
williamr@2: };
williamr@2: 
williamr@2: template<class T> inline void swap(scoped_array<T> & a, scoped_array<T> & b) // never throws
williamr@2: {
williamr@2:     a.swap(b);
williamr@2: }
williamr@2: 
williamr@2: } // namespace boost
williamr@2: 
williamr@2: #endif  // #ifndef BOOST_SCOPED_ARRAY_HPP_INCLUDED