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1 | |
2 | // Copyright Oliver Kowalke 2013. | |
3 | // Distributed under the Boost Software License, Version 1.0. | |
4 | // (See accompanying file LICENSE_1_0.txt or copy at | |
5 | // http://www.boost.org/LICENSE_1_0.txt) | |
6 | // | |
7 | // based on boost::interprocess::sync::interprocess_spin::mutex | |
8 | ||
9 | #ifndef BOOST_FIBERS_SPINLOCK_H | |
10 | #define BOOST_FIBERS_SPINLOCK_H | |
11 | ||
12 | #include <mutex> | |
13 | ||
14 | #include <boost/fiber/detail/config.hpp> | |
15 | ||
16 | namespace boost { | |
17 | namespace fibers { | |
18 | namespace detail { | |
19 | ||
20 | struct non_spinlock { | |
21 | constexpr non_spinlock() noexcept {} | |
22 | void lock() noexcept {} | |
23 | void unlock() noexcept {} | |
24 | }; | |
25 | ||
26 | struct non_lock { | |
27 | constexpr non_lock( non_spinlock) noexcept {} | |
28 | void lock() noexcept {} | |
29 | void unlock() noexcept {} | |
30 | }; | |
31 | ||
32 | #if ! defined(BOOST_FIBERS_NO_ATOMICS) | |
33 | typedef std::mutex spinlock; | |
34 | using spinlock_lock = std::unique_lock< spinlock >; | |
35 | #else | |
36 | typedef non_spinlock spinlock; | |
37 | using spinlock_lock = non_lock; | |
38 | #endif | |
39 | ||
40 | }}} | |
41 | ||
42 | #endif // BOOST_FIBERS_SPINLOCK_H |