[857] | 1 | // (C) Copyright Jonathan Turkanis 2004-2005.
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| 2 | // Distributed under the Boost Software License, Version 1.0. (See accompanying
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| 3 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
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| 4 |
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| 5 | // Contains the definition of move_ptrs::default_deleter, the default
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| 6 | // Deleter template argument to move_ptr. Uses a technique of Daniel
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| 7 | // Wallin to capture the type of a pointer at the time the deleter
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| 8 | // is constructed, so that move_ptrs can delete objects of incomplete
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| 9 | // type by default.
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| 10 |
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| 11 | #ifndef BOOST_MOVE_PTR_DEFAULT_DELETER_HPP_INCLUDED
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| 12 | #define BOOST_MOVE_PTR_DEFAULT_DELETER_HPP_INCLUDED
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| 13 |
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| 14 | #include <boost/checked_delete.hpp>
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| 15 | #include <boost/mpl/if.hpp>
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| 16 | #include <boost/type_traits/is_array.hpp>
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| 17 | #include <boost/type_traits/remove_bounds.hpp>
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| 18 |
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| 19 | namespace boost { namespace ptr_container_detail { namespace move_ptrs {
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| 20 |
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| 21 | namespace ptr_container_detail {
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| 22 |
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| 23 | template<typename T>
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| 24 | struct deleter_base {
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| 25 | typedef void (*deleter)(T*);
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| 26 | deleter_base(deleter d) { delete_ = d; }
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| 27 | void operator() (T* t) const { delete_(t); }
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| 28 | static deleter delete_;
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| 29 | };
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| 30 |
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| 31 | template<class T>
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| 32 | typename deleter_base<T>::deleter
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| 33 | deleter_base<T>::delete_;
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| 34 |
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| 35 | template<typename T>
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| 36 | struct scalar_deleter : deleter_base<T> {
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| 37 | typedef deleter_base<T> base;
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| 38 | scalar_deleter() : base(do_delete) { }
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| 39 | static void do_delete(T* t) { checked_delete(t); }
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| 40 | };
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| 41 |
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| 42 | template<typename T>
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| 43 | struct array_deleter
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| 44 | : deleter_base<typename remove_bounds<T>::type>
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| 45 | {
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| 46 | typedef typename remove_bounds<T>::type element_type;
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| 47 | typedef deleter_base<element_type> base;
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| 48 | array_deleter() : base(do_delete) { }
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| 49 | static void do_delete(element_type* t) { checked_array_delete(t); }
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| 50 | };
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| 51 |
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| 52 | } // End namespace ptr_container_detail.
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| 53 |
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| 54 | template<typename T>
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| 55 | struct default_deleter
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| 56 | : mpl::if_<
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| 57 | is_array<T>,
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| 58 | ptr_container_detail::array_deleter<T>,
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| 59 | ptr_container_detail::scalar_deleter<T>
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| 60 | >::type
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| 61 | {
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| 62 | default_deleter() { }
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| 63 | template<typename TT>
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| 64 | default_deleter(default_deleter<TT> tt) { }
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| 65 | };
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| 66 |
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| 67 | } } } // End namespaces ptr_container_detail, move_ptrs, boost.
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| 68 |
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| 69 | #endif // #ifndef BOOST_MOVE_PTR_DEFAULT_DELETER_HPP_INCLUDED
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