/usr/include/asio/detail/null_mutex.hpp is in libasio-dev 1.4.1-3ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | //
// null_mutex.hpp
// ~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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 ASIO_DETAIL_NULL_MUTEX_HPP
#define ASIO_DETAIL_NULL_MUTEX_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/push_options.hpp"
#include "asio/detail/push_options.hpp"
#include <boost/config.hpp>
#include "asio/detail/pop_options.hpp"
#if !defined(BOOST_HAS_THREADS)
#include "asio/detail/noncopyable.hpp"
#include "asio/detail/scoped_lock.hpp"
namespace asio {
namespace detail {
class null_mutex
: private noncopyable
{
public:
typedef asio::detail::scoped_lock<null_mutex> scoped_lock;
// Constructor.
null_mutex()
{
}
// Destructor.
~null_mutex()
{
}
// Lock the mutex.
void lock()
{
}
// Unlock the mutex.
void unlock()
{
}
};
} // namespace detail
} // namespace asio
#endif // !defined(BOOST_HAS_THREADS)
#include "asio/detail/pop_options.hpp"
#endif // ASIO_DETAIL_NULL_MUTEX_HPP
|