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1 | // DEPRECATED in favor of adl_postconstruct and adl_predestruct with |
2 | // deconstruct<T>(). | |
3 | // A factory function for creating a shared_ptr that enhances the plain | |
4 | // shared_ptr constructors by adding support for postconstructors | |
5 | // and predestructors through the boost::signals2::postconstructible and | |
6 | // boost::signals2::predestructible base classes. | |
7 | // | |
8 | // Copyright Frank Mori Hess 2007-2008. | |
9 | // | |
10 | // Use, modification and | |
11 | // distribution is subject to the Boost Software License, Version | |
12 | // 1.0. (See accompanying file LICENSE_1_0.txt or copy at | |
13 | // http://www.boost.org/LICENSE_1_0.txt) | |
14 | ||
15 | #ifndef BOOST_SIGNALS2_DECONSTRUCT_PTR_HPP | |
16 | #define BOOST_SIGNALS2_DECONSTRUCT_PTR_HPP | |
17 | ||
18 | #include <boost/assert.hpp> | |
19 | #include <boost/checked_delete.hpp> | |
b32b8144 | 20 | #include <boost/core/no_exceptions_support.hpp> |
7c673cae FG |
21 | #include <boost/signals2/postconstructible.hpp> |
22 | #include <boost/signals2/predestructible.hpp> | |
23 | #include <boost/shared_ptr.hpp> | |
24 | ||
25 | namespace boost | |
26 | { | |
27 | namespace signals2 | |
28 | { | |
29 | namespace detail | |
30 | { | |
31 | inline void do_postconstruct(const postconstructible *ptr) | |
32 | { | |
33 | postconstructible *nonconst_ptr = const_cast<postconstructible*>(ptr); | |
34 | nonconst_ptr->postconstruct(); | |
35 | } | |
36 | inline void do_postconstruct(...) | |
37 | { | |
38 | } | |
39 | inline void do_predestruct(...) | |
40 | { | |
41 | } | |
42 | inline void do_predestruct(const predestructible *ptr) | |
43 | { | |
b32b8144 | 44 | BOOST_TRY |
7c673cae FG |
45 | { |
46 | predestructible *nonconst_ptr = const_cast<predestructible*>(ptr); | |
47 | nonconst_ptr->predestruct(); | |
48 | } | |
b32b8144 | 49 | BOOST_CATCH(...) |
7c673cae FG |
50 | { |
51 | BOOST_ASSERT(false); | |
52 | } | |
b32b8144 | 53 | BOOST_CATCH_END |
7c673cae FG |
54 | } |
55 | } | |
56 | ||
57 | template<typename T> class predestructing_deleter | |
58 | { | |
59 | public: | |
60 | void operator()(const T *ptr) const | |
61 | { | |
62 | detail::do_predestruct(ptr); | |
63 | checked_delete(ptr); | |
64 | } | |
65 | }; | |
66 | ||
67 | template<typename T> | |
68 | shared_ptr<T> deconstruct_ptr(T *ptr) | |
69 | { | |
70 | if(ptr == 0) return shared_ptr<T>(ptr); | |
71 | shared_ptr<T> shared(ptr, boost::signals2::predestructing_deleter<T>()); | |
72 | detail::do_postconstruct(ptr); | |
73 | return shared; | |
74 | } | |
75 | template<typename T, typename D> | |
76 | shared_ptr<T> deconstruct_ptr(T *ptr, D deleter) | |
77 | { | |
78 | shared_ptr<T> shared(ptr, deleter); | |
79 | if(ptr == 0) return shared; | |
80 | detail::do_postconstruct(ptr); | |
81 | return shared; | |
82 | } | |
83 | } | |
84 | } | |
85 | ||
86 | #endif // BOOST_SIGNALS2_DECONSTRUCT_PTR_HPP |