PMDK C++ bindings 1.2.0
This is the C++ bindings documentation for PMDK's libpmemobj.
make_atomic_impl.hpp
Go to the documentation of this file.
1/*
2 * Copyright 2016-2017, Intel Corporation
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * * Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
14 * distribution.
15 *
16 * * Neither the name of the copyright holder nor the names of its
17 * contributors may be used to endorse or promote products derived
18 * from this software without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
38#ifndef LIBPMEMOBJ_MAKE_ATOMIC_IMPL_HPP
39#define LIBPMEMOBJ_MAKE_ATOMIC_IMPL_HPP
40
41#include <new>
42#include <stddef.h>
43
47
48namespace pmem
49{
50
51namespace detail
52{
53
54/*
55 * Calls the objects constructor.
56 *
57 * Unpacks the tuple to get constructor's parameters.
58 */
59template <typename T, size_t... Indices, typename... Args>
60void
61create_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 */
71template <typename T, typename... Args>
72int
73obj_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 */
95template <typename T>
96int
97array_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_MAKE_ATOMIC_IMPL_HPP */
Common array traits.
Create c++14 style index sequence.
Functions for destroying arrays.