]>
Commit | Line | Data |
---|---|---|
7c673cae FG |
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> | |
20 | #include <boost/signals2/postconstructible.hpp> | |
21 | #include <boost/signals2/predestructible.hpp> | |
22 | #include <boost/shared_ptr.hpp> | |
23 | ||
24 | namespace boost | |
25 | { | |
26 | namespace signals2 | |
27 | { | |
28 | namespace detail | |
29 | { | |
30 | inline void do_postconstruct(const postconstructible *ptr) | |
31 | { | |
32 | postconstructible *nonconst_ptr = const_cast<postconstructible*>(ptr); | |
33 | nonconst_ptr->postconstruct(); | |
34 | } | |
35 | inline void do_postconstruct(...) | |
36 | { | |
37 | } | |
38 | inline void do_predestruct(...) | |
39 | { | |
40 | } | |
41 | inline void do_predestruct(const predestructible *ptr) | |
42 | { | |
43 | try | |
44 | { | |
45 | predestructible *nonconst_ptr = const_cast<predestructible*>(ptr); | |
46 | nonconst_ptr->predestruct(); | |
47 | } | |
48 | catch(...) | |
49 | { | |
50 | BOOST_ASSERT(false); | |
51 | } | |
52 | } | |
53 | } | |
54 | ||
55 | template<typename T> class predestructing_deleter | |
56 | { | |
57 | public: | |
58 | void operator()(const T *ptr) const | |
59 | { | |
60 | detail::do_predestruct(ptr); | |
61 | checked_delete(ptr); | |
62 | } | |
63 | }; | |
64 | ||
65 | template<typename T> | |
66 | shared_ptr<T> deconstruct_ptr(T *ptr) | |
67 | { | |
68 | if(ptr == 0) return shared_ptr<T>(ptr); | |
69 | shared_ptr<T> shared(ptr, boost::signals2::predestructing_deleter<T>()); | |
70 | detail::do_postconstruct(ptr); | |
71 | return shared; | |
72 | } | |
73 | template<typename T, typename D> | |
74 | shared_ptr<T> deconstruct_ptr(T *ptr, D deleter) | |
75 | { | |
76 | shared_ptr<T> shared(ptr, deleter); | |
77 | if(ptr == 0) return shared; | |
78 | detail::do_postconstruct(ptr); | |
79 | return shared; | |
80 | } | |
81 | } | |
82 | } | |
83 | ||
84 | #endif // BOOST_SIGNALS2_DECONSTRUCT_PTR_HPP |