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File: compare_handles.hpp
// 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/winapi/handles.hpp> #include <boost/winapi/file_management.hpp> #include <boost/process/detail/config.hpp> namespace boost { namespace process { namespace detail { namespace windows { inline bool compare_handles(boost::winapi::HANDLE_ lhs, boost::winapi::HANDLE_ rhs) { if ( (lhs == ::boost::winapi::INVALID_HANDLE_VALUE_) || (rhs == ::boost::winapi::INVALID_HANDLE_VALUE_)) return false; if (lhs == rhs) return true; ::boost::winapi::BY_HANDLE_FILE_INFORMATION_ lhs_info{0,{0,0},{0,0},{0,0},0,0,0,0,0,0}; ::boost::winapi::BY_HANDLE_FILE_INFORMATION_ rhs_info{0,{0,0},{0,0},{0,0},0,0,0,0,0,0}; if (!::boost::winapi::GetFileInformationByHandle(lhs, &lhs_info)) ::boost::process::detail::throw_last_error("GetFileInformationByHandle"); if (!::boost::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_ */