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/*
* async_handler.hpp
*
* Created on: 12.06.2016
* Author: Klemens
*/
#ifndef BOOST_PROCESS_DETAIL_ASYNC_HANDLER_HPP_
#define BOOST_PROCESS_DETAIL_ASYNC_HANDLER_HPP_
#include <type_traits>
#if defined(BOOST_POSIX_API)
#include <boost/process/posix.hpp>
#include <boost/process/detail/posix/async_handler.hpp>
#include <boost/process/detail/posix/asio_fwd.hpp>
#else
#include <boost/process/detail/windows/async_handler.hpp>
#include <boost/process/detail/windows/asio_fwd.hpp>
#endif
namespace boost {
namespace process {
namespace detail {
#if defined(BOOST_POSIX_API)
using ::boost::process::detail::posix::is_async_handler;
using ::boost::process::detail::posix::does_require_io_context;
#else
using ::boost::process::detail::windows::is_async_handler;
using ::boost::process::detail::windows::does_require_io_context;
#endif
template<typename ...Args>
struct has_io_context;
template<typename T, typename ...Args>
struct has_io_context<T, Args...>
{
typedef typename has_io_context<Args...>::type next;
typedef typename std::is_same<
typename std::remove_reference<T>::type,
boost::asio::io_context>::type is_ios;
typedef typename std::conditional<is_ios::value,
std::true_type,
next>::type type;
};
template<typename T>
struct has_io_context<T>
{
typedef typename std::is_same<
typename std::remove_reference<T>::type,
boost::asio::io_context>::type type;
};
template<typename ...Args>
using has_io_context_t = typename has_io_context<Args...>::type;
template<typename ...Args>
struct has_async_handler;
template<typename T, typename ...Args>
struct has_async_handler<T, Args...>
{
typedef typename has_async_handler<Args...>::type next;
typedef typename is_async_handler<T>::type is_ios;
typedef typename std::conditional<is_ios::value,
std::true_type,
next>::type type;
};
template<typename T>
struct has_async_handler<T>
{
typedef typename is_async_handler<T>::type type;
};
template<typename ...Args>
struct needs_io_context;
template<typename T, typename ...Args>
struct needs_io_context<T, Args...>
{
typedef typename needs_io_context<Args...>::type next;
typedef typename does_require_io_context<T>::type is_ios;
typedef typename std::conditional<is_ios::value,
std::true_type,
next>::type type;
};
template<typename T>
struct needs_io_context<T>
{
typedef typename does_require_io_context<T>::type type;
};
template<typename ...Args>
boost::asio::io_context &get_io_context_var(boost::asio::io_context & f, Args&...)
{
return f;
}
template<typename First, typename ...Args>
boost::asio::io_context &get_io_context_var(First&, Args&...args)
{
return get_io_context_var(args...);
}
}
}
}
#endif /* BOOST_PROCESS_DETAIL_ASYNC_HANDLER_HPP_ */
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