williamr@2: //
williamr@2: // Boost.Pointer Container
williamr@2: //
williamr@2: //  Copyright Thorsten Ottosen 2003-2005. Use, modification and
williamr@2: //  distribution is subject to the Boost Software License, Version
williamr@2: //  1.0. (See accompanying file LICENSE_1_0.txt or copy at
williamr@2: //  http://www.boost.org/LICENSE_1_0.txt)
williamr@2: //
williamr@2: // For more information, see http://www.boost.org/libs/ptr_container/
williamr@2: //
williamr@2: 
williamr@2: #ifndef BOOST_PTR_CONTAINER_SCOPED_DELETER_HPP
williamr@2: #define BOOST_PTR_CONTAINER_SCOPED_DELETER_HPP
williamr@2: 
williamr@2: #if defined(_MSC_VER) && (_MSC_VER >= 1200)
williamr@2: # pragma once
williamr@2: #endif
williamr@2: 
williamr@2: #include <iterator>
williamr@2: #include <cstddef>
williamr@2: #include <boost/scoped_array.hpp>
williamr@2: 
williamr@2: namespace boost
williamr@2: {
williamr@2: 
williamr@2:     namespace ptr_container_detail
williamr@2:     {
williamr@2:         template< class T, class CloneAllocator >
williamr@2:         class scoped_deleter
williamr@2:         {
williamr@2:             typedef std::size_t size_type;
williamr@2:             scoped_array<T*>  ptrs_;
williamr@2:             size_type         stored_; 
williamr@2:             bool              released_;
williamr@2:             
williamr@2:         public:
williamr@2:             scoped_deleter( size_type size ) : 
williamr@2:                 ptrs_( new T*[size] ), stored_( 0 ), 
williamr@2:                 released_( false )
williamr@2:             {
williamr@2:                 BOOST_ASSERT( size > 0 );
williamr@2:             }
williamr@2: 
williamr@2: 
williamr@2:             
williamr@2:             scoped_deleter( size_type n, const T& x ) // strong
williamr@2:                 : ptrs_( new T*[n] ), stored_(0),
williamr@2:                   released_( false )
williamr@2:             {
williamr@2:                 for( size_type i = 0; i != n; i++ )
williamr@2:                     add( CloneAllocator::allocate_clone( &x ) );
williamr@2:                 BOOST_ASSERT( stored_ > 0 );
williamr@2:             }
williamr@2: 
williamr@2: 
williamr@2:             
williamr@2:             template< class InputIterator >
williamr@2:             scoped_deleter ( InputIterator first, InputIterator last  ) // strong
williamr@2:                 : ptrs_( new T*[ std::distance(first,last) ] ),
williamr@2:                   stored_(0),
williamr@2:                   released_( false )
williamr@2:             {
williamr@2:                 for( ; first != last; ++first )
williamr@2:                     add( CloneAllocator::allocate_clone_from_iterator( first ) );
williamr@2:                 BOOST_ASSERT( stored_ > 0 );
williamr@2:             }
williamr@2: 
williamr@2:             
williamr@2:             
williamr@2:             ~scoped_deleter()
williamr@2:             {
williamr@2:                 if ( !released_ )
williamr@2:                 {
williamr@2:                     for( size_type i = 0u; i != stored_; ++i )
williamr@2:                         CloneAllocator::deallocate_clone( ptrs_[i] ); 
williamr@2:                 }
williamr@2:             }
williamr@2:             
williamr@2:             
williamr@2:             
williamr@2:             void add( T* t )
williamr@2:             {
williamr@2:                 BOOST_ASSERT( ptrs_.get() != 0 );
williamr@2:                 ptrs_[stored_] = t;
williamr@2:                 ++stored_;
williamr@2:             }
williamr@2:             
williamr@2:             
williamr@2:             
williamr@2:             void release()
williamr@2:             {
williamr@2:                 released_ = true;
williamr@2:             }
williamr@2:             
williamr@2:             
williamr@2:             
williamr@2:             T** begin()
williamr@2:             {
williamr@2:                 BOOST_ASSERT( ptrs_.get() != 0 );
williamr@2:                 return &ptrs_[0];
williamr@2:             }
williamr@2:             
williamr@2:             
williamr@2:             
williamr@2:             T** end()
williamr@2:             {
williamr@2:                 BOOST_ASSERT( ptrs_.get() != 0 );
williamr@2:                 return &ptrs_[stored_];
williamr@2:             }
williamr@2:             
williamr@2:         }; // class 'scoped_deleter'
williamr@2:     }
williamr@2: }
williamr@2: 
williamr@2: #endif