executor.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/windows/child.hpp>
#include <boost/fusion/algorithm/iteration/for_each.hpp>
#include <Windows.h>
 
namespace boost::process::windows
{
 
    struct executor
    {
        executor() : exe(0), cmd_line(0), proc_attrs(0), thread_attrs(0),
            inherit_handles(FALSE),
#if (_WIN32_WINNT >= 0x0600)
            creation_flags(EXTENDED_STARTUPINFO_PRESENT),
#else
            creation_flags(0),
#endif
            env(0), work_dir(0)
#if (_WIN32_WINNT >= 0x0600)
            , startup_info(startup_info_ex.StartupInfo)
#endif
        {
#if (_WIN32_WINNT >= 0x0600)
            ZeroMemory(&startup_info_ex, sizeof(STARTUPINFOEX));
            startup_info.cb = sizeof(STARTUPINFOEX);
#else
            ZeroMemory(&startup_info, sizeof(STARTUPINFO));
            startup_info.cb = sizeof(STARTUPINFO);
#endif
            startup_info.hStdInput = INVALID_HANDLE_VALUE;
            startup_info.hStdOutput = INVALID_HANDLE_VALUE;
            startup_info.hStdError = INVALID_HANDLE_VALUE;
        }
 
        struct call_on_CreateProcess_setup
        {
            executor& e_;
 
            call_on_CreateProcess_setup(executor& e) : e_(e) {}
 
            template <class Arg>
            void operator()(Arg& arg) const
            {
                arg.on_CreateProcess_setup(e_);
            }
        };
 
        struct call_on_CreateProcess_error
        {
            executor& e_;
 
            call_on_CreateProcess_error(executor& e) : e_(e) {}
 
            template <class Arg>
            void operator()(Arg& arg) const
            {
                arg.on_CreateProcess_error(e_);
            }
        };
 
        struct call_on_CreateProcess_success
        {
            executor& e_;
 
            call_on_CreateProcess_success(executor& e) : e_(e) {}
 
            template <class Arg>
            void operator()(Arg& arg) const
            {
                arg.on_CreateProcess_success(e_);
            }
        };
 
        template <class InitializerSequence>
        child operator()(const InitializerSequence& seq)
        {
            boost::fusion::for_each(seq, call_on_CreateProcess_setup(*this));
 
            if (!::CreateProcess(
                    exe,
                    cmd_line,
                    proc_attrs,
                    thread_attrs,
                    inherit_handles,
                    creation_flags,
                    env,
                    work_dir,
                    &startup_info,
                    &proc_info))
            {
                boost::fusion::for_each(seq, call_on_CreateProcess_error(*this));
            }
            else
            {
                boost::fusion::for_each(seq, call_on_CreateProcess_success(*this));
            }
 
            return child(proc_info);
        }
 
        LPCTSTR exe;
        LPTSTR cmd_line;
        LPSECURITY_ATTRIBUTES proc_attrs;
        LPSECURITY_ATTRIBUTES thread_attrs;
        BOOL inherit_handles;
        DWORD creation_flags;
        LPVOID env;
        LPCTSTR work_dir;
#if (_WIN32_WINNT >= 0x0600)
        STARTUPINFOEX startup_info_ex;
        STARTUPINFO& startup_info;
#else
        STARTUPINFO startup_info;
#endif
        PROCESS_INFORMATION proc_info;
    };
 
}