/src/botan/build/include/botan/internal/atomic.h
Line | Count | Source (jump to first uncovered line) |
1 | | /* |
2 | | * Atomic |
3 | | * (C) 2016 Matthias Gierlings |
4 | | * |
5 | | * Botan is released under the Simplified BSD License (see license.txt) |
6 | | **/ |
7 | | |
8 | | #ifndef BOTAN_ATOMIC_H_ |
9 | | #define BOTAN_ATOMIC_H_ |
10 | | |
11 | | #include <botan/types.h> |
12 | | #include <atomic> |
13 | | #include <memory> |
14 | | |
15 | | namespace Botan { |
16 | | |
17 | | template <typename T> |
18 | | /** |
19 | | * Simple helper class to expand std::atomic with copy constructor and copy |
20 | | * assignment operator, i.e. for use as element in a container like |
21 | | * std::vector. The construction of instances of this wrapper is NOT atomic |
22 | | * and needs to be properly guarded. |
23 | | **/ |
24 | | class Atomic final |
25 | | { |
26 | | public: |
27 | | Atomic() = default; |
28 | | Atomic(const Atomic& data) : m_data(data.m_data.load()) {} |
29 | 0 | Atomic(const std::atomic<T>& data) : m_data(data.load()) {} |
30 | | ~Atomic() = default; |
31 | | |
32 | | Atomic& operator=(const Atomic& a) |
33 | | { |
34 | | m_data.store(a.m_data.load()); |
35 | | return *this; |
36 | | } |
37 | | |
38 | | Atomic& operator=(const std::atomic<T>& a) |
39 | | { |
40 | | m_data.store(a.load()); |
41 | | return *this; |
42 | | } |
43 | | |
44 | 0 | operator std::atomic<T>& () { return m_data; } |
45 | 0 | operator T() { return m_data.load(); } |
46 | | |
47 | | private: |
48 | | std::atomic<T> m_data; |
49 | | }; |
50 | | |
51 | | } |
52 | | |
53 | | #endif |