PMDK C++ bindings  1.5.2
This is the C++ bindings documentation for PMDK's libpmemobj.
make_atomic_impl.hpp
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32 
38 #ifndef LIBPMEMOBJ_CPP_MAKE_ATOMIC_IMPL_HPP
39 #define LIBPMEMOBJ_CPP_MAKE_ATOMIC_IMPL_HPP
40 
41 #include <new>
42 #include <stddef.h>
43 
47 
48 namespace pmem
49 {
50 
51 namespace detail
52 {
53 
54 /*
55  * Calls the objects constructor.
56  *
57  * Unpacks the tuple to get constructor's parameters.
58  */
59 template <typename T, size_t... Indices, typename... Args>
60 void
61 create_object(void *ptr, index_sequence<Indices...>, std::tuple<Args...> &tuple)
62 {
63  new (ptr) T(std::get<Indices>(tuple)...);
64 }
65 
66 /*
67  * C-style function called by the allocator.
68  *
69  * The arg is a tuple containing constructor parameters.
70  */
71 template <typename T, typename... Args>
72 int
73 obj_constructor(PMEMobjpool *pop, void *ptr, void *arg)
74 {
75  auto *arg_pack = static_cast<std::tuple<Args &...> *>(arg);
76 
77  typedef typename make_index_sequence<Args...>::type index;
78  try {
79  create_object<T>(ptr, index(), *arg_pack);
80  } catch (...) {
81  return -1;
82  }
83 
84  pmemobj_persist(pop, ptr, sizeof(T));
85 
86  return 0;
87 }
88 
89 /*
90  * Constructor used for atomic array allocations.
91  *
92  * Returns -1 if an exception was thrown during T's construction,
93  * 0 otherwise.
94  */
95 template <typename T>
96 int
97 array_constructor(PMEMobjpool *pop, void *ptr, void *arg)
98 {
99  std::size_t N = *static_cast<std::size_t *>(arg);
100 
101  T *tptr = static_cast<T *>(ptr);
102  try {
103  for (std::size_t i = 0; i < N; ++i)
104  detail::create<T>(tptr + i);
105  } catch (...) {
106  return -1;
107  }
108 
109  pmemobj_persist(pop, ptr, sizeof(T) * N);
110 
111  return 0;
112 }
113 
114 } /* namespace detail */
115 
116 } /* namespace pmem */
117 
118 #endif /* LIBPMEMOBJ_CPP_MAKE_ATOMIC_IMPL_HPP */
integer_sequence.hpp
Create c++14 style index sequence.
array_traits.hpp
Common array traits.
life.hpp
Functions for destroying arrays.