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//
// detail/null_thread.hpp
// ~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2018 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_THREAD_HPP
#define ASIO_DETAIL_NULL_THREAD_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#if !defined(ASIO_HAS_THREADS)
#include "asio/detail/noncopyable.hpp"
#include "asio/detail/throw_error.hpp"
#include "asio/error.hpp"
#include "asio/detail/push_options.hpp"
namespace asio {
namespace detail {
class null_thread
: private noncopyable
{
public:
// Constructor.
template <typename Function>
null_thread(Function, unsigned int = 0)
{
asio::detail::throw_error(
asio::error::operation_not_supported, "thread");
}
// Destructor.
~null_thread()
{
}
// Wait for the thread to exit.
void join()
{
}
// Get number of CPUs.
static std::size_t hardware_concurrency()
{
return 1;
}
};
} // namespace detail
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // !defined(ASIO_HAS_THREADS)
#endif // ASIO_DETAIL_NULL_THREAD_HPP
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