/usr/include/boost/histogram/detail
Edit: /usr/include/boost/histogram/detail/mutex_base.hpp (1228B)
// Copyright 2019 Hans Dembinski
//
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt
// or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef BOOST_HISTOGRAM_DETAIL_NOOP_MUTEX_HPP
#define BOOST_HISTOGRAM_DETAIL_NOOP_MUTEX_HPP
#include
#include
#include // mp_if
#include
namespace boost {
namespace histogram {
namespace detail {
struct null_mutex {
bool try_lock() noexcept { return true; }
void lock() noexcept {}
void unlock() noexcept {}
};
template ::value),
std::mutex, detail::null_mutex>>
struct mutex_base : empty_value {
mutex_base() = default;
// do not copy or move mutex
mutex_base(const mutex_base&) : empty_value() {}
// do not copy or move mutex
mutex_base& operator=(const mutex_base&) { return *this; }
};
} // namespace detail
} // namespace histogram
} // namespace boost
#endif