memory_order.hpp
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1 #ifndef BOOST_MEMORY_ORDER_HPP_INCLUDED
2 #define BOOST_MEMORY_ORDER_HPP_INCLUDED
3 
4 // MS compatible compilers support #pragma once
5 
6 #if defined(_MSC_VER) && (_MSC_VER >= 1020)
7 # pragma once
8 #endif
9 
10 // boost/memory_order.hpp
11 //
12 // Defines enum boost::memory_order per the C++0x working draft
13 //
14 // Copyright (c) 2008, 2009 Peter Dimov
15 //
16 // Distributed under the Boost Software License, Version 1.0.
17 // See accompanying file LICENSE_1_0.txt or copy at
18 // http://www.boost.org/LICENSE_1_0.txt)
19 
20 
21 namespace boost
22 {
23 
24 //
25 // Enum values are chosen so that code that needs to insert
26 // a trailing fence for acquire semantics can use a single
27 // test such as:
28 //
29 // if( mo & memory_order_acquire ) { ...fence... }
30 //
31 // For leading fences one can use:
32 //
33 // if( mo & memory_order_release ) { ...fence... }
34 //
35 // Architectures such as Alpha that need a fence on consume
36 // can use:
37 //
38 // if( mo & ( memory_order_acquire | memory_order_consume ) ) { ...fence... }
39 //
40 
42 {
46  memory_order_acq_rel = 3, // acquire | release
47  memory_order_seq_cst = 7, // acq_rel | 4
49 };
50 
51 } // namespace boost
52 
53 #endif // #ifndef BOOST_MEMORY_ORDER_HPP_INCLUDED
Definition: base.hpp:116


rosatomic
Author(s): Josh Faust
autogenerated on Mon Jun 10 2019 14:44:41