PMDK C++ bindings  1.9
This is the C++ bindings documentation for PMDK's libpmemobj.
pool_data.hpp
Go to the documentation of this file.
1 /*
2  * Copyright 2019, 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 
39 #ifndef LIBPMEMOBJ_CPP_POOL_DATA_HPP
40 #define LIBPMEMOBJ_CPP_POOL_DATA_HPP
41 
42 #include <atomic>
43 #include <functional>
44 
45 namespace pmem
46 {
47 
48 namespace detail
49 {
50 
51 struct pool_data {
52  pool_data()
53  {
54  initialized = false;
55  }
56 
57  /* Set cleanup function if not already set */
58  void
59  set_cleanup(std::function<void()> cleanup)
60  {
61  bool expected = false;
62 
63  /* this is only to protect from concurrent initializations,
64  * there will be no concurrent reads */
65  if (initialized.compare_exchange_strong(
66  expected, true, std::memory_order_release,
67  std::memory_order_relaxed)) {
68  this->cleanup = cleanup;
69  }
70  }
71 
72  std::atomic<bool> initialized;
73  std::function<void()> cleanup;
74 };
75 
76 } /* namespace detail */
77 
78 } /* namespace pmem */
79 
80 #endif /* LIBPMEMOBJ_CPP_POOL_DATA_HPP */
pmem
Persistent memory namespace.
Definition: allocation_flag.hpp:44