wait_for_exit.hpp

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// Copyright (c) 2006, 2007 Julio M. Merino Vidal
// Copyright (c) 2008 Ilya Sokolov, Boris Schaeling
// Copyright (c) 2009 Boris Schaeling
// Copyright (c) 2010 Felipe Tanus, Boris Schaeling
// Copyright (c) 2011, 2012 Jeff Flinn, Boris Schaeling
//
// 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)
 
#pragma once
 
#include <boost/process/config.hpp>
#include <boost/system/error_code.hpp>
 
#include <Windows.h>
 
namespace boost::process::windows
{
 
    template <class Process>
    inline DWORD
    wait_for_exit(const Process& p)
    {
        if (::WaitForSingleObject(p.process_handle(), INFINITE) == WAIT_FAILED)
        {
            BOOST_PROCESS_THROW_LAST_SYSTEM_ERROR("WaitForSingleObject() failed");
        }
 
        DWORD exit_code;
        if (!::GetExitCodeProcess(p.process_handle(), &exit_code))
        {
            BOOST_PROCESS_THROW_LAST_SYSTEM_ERROR("GetExitCodeProcess() failed");
        }
 
        return exit_code;
    }
 
    template <class Process>
    inline DWORD
    wait_for_exit(const Process& p, boost::system::error_code& ec)
    {
        DWORD exit_code = 1;
 
        if (::WaitForSingleObject(p.process_handle(), INFINITE) == WAIT_FAILED)
        {
            BOOST_PROCESS_RETURN_LAST_SYSTEM_ERROR(ec);
        }
        else if (!::GetExitCodeProcess(p.process_handle(), &exit_code))
        {
            BOOST_PROCESS_RETURN_LAST_SYSTEM_ERROR(ec);
        }
        else
        {
            ec.clear();
        }
 
        return exit_code;
    }
 
} // namespace boost::process::windows