libstdc++
atomic_lockfree_defines.h
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1 // -*- C++ -*- header.
2 
3 // Copyright (C) 2008-2021 Free Software Foundation, Inc.
4 //
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
9 // any later version.
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11 // This library is distributed in the hope that it will be useful,
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13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 
16 // Under Section 7 of GPL version 3, you are granted additional
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18 // 3.1, as published by the Free Software Foundation.
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24 
25 /** @file bits/atomic_lockfree_defines.h
26  * This is an internal header file, included by other library headers.
27  * Do not attempt to use it directly. @headername{atomic}
28  */
29 
30 #ifndef _GLIBCXX_ATOMIC_LOCK_FREE_H
31 #define _GLIBCXX_ATOMIC_LOCK_FREE_H 1
32 
33 #pragma GCC system_header
34 
35 /**
36  * @addtogroup atomics
37  * @{
38  */
39 
40 /**
41  * Lock-free property.
42  *
43  * 0 indicates that the types are never lock-free.
44  * 1 indicates that the types are sometimes lock-free.
45  * 2 indicates that the types are always lock-free.
46  */
47 
48 #if __cplusplus >= 201103L
49 #define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE
50 #define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE
51 #define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE
52 #ifdef _GLIBCXX_USE_CHAR8_T
53 #define ATOMIC_CHAR8_T_LOCK_FREE __GCC_ATOMIC_CHAR8_T_LOCK_FREE
54 #endif
55 #define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE
56 #define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE
57 #define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE
58 #define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE
59 #define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE
60 #define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE
61 #define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE
62 #endif
63 
64 /// @} group atomics
65 
66 #endif