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