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// Copyright (c) 2016 Klemens D. Morgenstern
//
// 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_PROCESS_DETAIL_WINDOWS_COMPARE_HANDLES_HPP_
#define BOOST_PROCESS_DETAIL_WINDOWS_COMPARE_HANDLES_HPP_
#include <boost/detail/winapi/handles.hpp>
#include <boost/detail/winapi/file_management.hpp>
#include <boost/process/detail/config.hpp>
namespace boost { namespace process { namespace detail { namespace windows {
inline bool compare_handles(boost::detail::winapi::HANDLE_ lhs, boost::detail::winapi::HANDLE_ rhs)
{
if ( (lhs == ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
|| (rhs == ::boost::detail::winapi::INVALID_HANDLE_VALUE_))
return false;
if (lhs == rhs)
return true;
::boost::detail::winapi::BY_HANDLE_FILE_INFORMATION_ lhs_info{0,{0,0},{0,0},{0,0},0,0,0,0,0,0};
::boost::detail::winapi::BY_HANDLE_FILE_INFORMATION_ rhs_info{0,{0,0},{0,0},{0,0},0,0,0,0,0,0};
if (!::boost::detail::winapi::GetFileInformationByHandle(lhs, &lhs_info))
::boost::process::detail::throw_last_error("GetFileInformationByHandle");
if (!::boost::detail::winapi::GetFileInformationByHandle(rhs, &rhs_info))
::boost::process::detail::throw_last_error("GetFileInformationByHandle");
return (lhs_info.nFileIndexHigh == rhs_info.nFileIndexHigh)
&& (lhs_info.nFileIndexLow == rhs_info.nFileIndexLow);
}
}}}}
#endif /* BOOST_PROCESS_DETAIL_WINDOWS_COMPARE_HANDLES_HPP_ */
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