ome-common  5.2.0
memory.h
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3  * OME-COMPAT C++ library for C++ compatibility/portability
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38 
48 #ifndef OME_COMPAT_MEMORY_H
49 # define OME_COMPAT_MEMORY_H
50 
51 # include <ome/common/config.h>
52 
53 # ifdef OME_HAVE_MEMORY
54 # include <memory>
55 # elif OME_HAVE_BOOST_SHARED_PTR
56 # include <boost/enable_shared_from_this.hpp>
57 # include <boost/make_shared.hpp>
58 # include <boost/shared_ptr.hpp>
59 # ifdef OME_HAVE_BOOST_OWNER_LESS
60 # include <boost/smart_ptr/owner_less.hpp>
61 # else
62 # include <functional>
63 // From Boost 1.56 <boost/smart_ptr/owner_less.hpp> for older boost
64 // versions; owner_before replaced with direct operator< usage which
65 // older shared_ptr/weak_ptr implementations do not provide. shared
66 // and weak are not directly comparable, so convert to weak for these
67 // comparisons.
68 namespace boost
69 {
70  template<typename T> class shared_ptr;
71  template<typename T> class weak_ptr;
72 
73  namespace detail
74  {
75  template<typename T, typename U>
76  struct generic_owner_less : public std::binary_function<T, T, bool>
77  {
78  bool operator()(const T &lhs, const T &rhs) const
79  {
80  return lhs < rhs;
81  }
82  bool operator()(const T &lhs, const U &rhs) const
83  {
84  return weak_ptr<typename T::element_type>(lhs) < weak_ptr<typename T::element_type>(rhs);
85  }
86  bool operator()(const U &lhs, const T &rhs) const
87  {
88  return weak_ptr<typename T::element_type>(lhs) < weak_ptr<typename T::element_type>(rhs);
89  }
90  };
91  } // namespace detail
92 
93  template<typename T> struct owner_less;
94 
95  template<typename T>
96  struct owner_less<shared_ptr<T> >:
97  public detail::generic_owner_less<shared_ptr<T>, weak_ptr<T> >
98  {};
99 
100  template<typename T>
101  struct owner_less<weak_ptr<T> >:
102  public detail::generic_owner_less<weak_ptr<T>, shared_ptr<T> >
103  {};
104 
105 } // namespace boost
106 # endif
107 namespace ome
108 {
109  namespace compat
110  {
111  using boost::shared_ptr;
112  using boost::weak_ptr;
113  using boost::static_pointer_cast;
114  using boost::const_pointer_cast;
115  using boost::dynamic_pointer_cast;
116  using boost::enable_shared_from_this;
117  using boost::make_shared;
118  using boost::owner_less;
119  }
120 }
121 # else
122 # error A shared_ptr implementation is not available
123 # endif
124 
125 #endif // OME_COMPAT_MEMORY_H
126 
127 /*
128  * Local Variables:
129  * mode:C++
130  * End:
131  */
Definition: length.h:576
Definition: boolean.h:48