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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_FILE_DESCRIPTOR_HPP_
#define BOOST_PROCESS_DETAIL_WINDOWS_FILE_DESCRIPTOR_HPP_
#include <boost/winapi/basic_types.hpp>
#include <boost/winapi/handles.hpp>
#include <boost/winapi/file_management.hpp>
#include <string>
#include <boost/filesystem/path.hpp>
#include <boost/core/exchange.hpp>
namespace boost { namespace process { namespace detail { namespace windows {
struct file_descriptor
{
enum mode_t
{
read = 1,
write = 2,
read_write = 3
};
static ::boost::winapi::DWORD_ desired_access(mode_t mode)
{
switch(mode)
{
case read:
return ::boost::winapi::GENERIC_READ_;
case write:
return ::boost::winapi::GENERIC_WRITE_;
case read_write:
return ::boost::winapi::GENERIC_READ_
| ::boost::winapi::GENERIC_WRITE_;
default:
return 0u;
}
}
file_descriptor() = default;
file_descriptor(const boost::filesystem::path& p, mode_t mode = read_write)
: file_descriptor(p.native(), mode)
{
}
file_descriptor(const std::string & path , mode_t mode = read_write)
#if defined(BOOST_NO_ANSI_APIS)
: file_descriptor(::boost::process::detail::convert(path), mode)
#else
: file_descriptor(path.c_str(), mode)
#endif
{}
file_descriptor(const std::wstring & path, mode_t mode = read_write)
: file_descriptor(path.c_str(), mode) {}
file_descriptor(const char* path, mode_t mode = read_write)
#if defined(BOOST_NO_ANSI_APIS)
: file_descriptor(std::string(path), mode)
#else
: _handle(
::boost::winapi::create_file(
path,
desired_access(mode),
::boost::winapi::FILE_SHARE_READ_ |
::boost::winapi::FILE_SHARE_WRITE_,
nullptr,
::boost::winapi::OPEN_ALWAYS_,
::boost::winapi::FILE_ATTRIBUTE_NORMAL_,
nullptr
))
#endif
{
}
file_descriptor(const wchar_t * path, mode_t mode = read_write)
: _handle(
::boost::winapi::create_file(
path,
desired_access(mode),
::boost::winapi::FILE_SHARE_READ_ |
::boost::winapi::FILE_SHARE_WRITE_,
nullptr,
::boost::winapi::OPEN_ALWAYS_,
::boost::winapi::FILE_ATTRIBUTE_NORMAL_,
nullptr
))
{
}
file_descriptor(const file_descriptor & ) = delete;
file_descriptor(file_descriptor &&other)
: _handle( boost::exchange(other._handle, ::boost::winapi::INVALID_HANDLE_VALUE_) )
{
}
file_descriptor& operator=(const file_descriptor & ) = delete;
file_descriptor& operator=(file_descriptor &&other)
{
if (_handle != ::boost::winapi::INVALID_HANDLE_VALUE_)
::boost::winapi::CloseHandle(_handle);
_handle = boost::exchange(other._handle, ::boost::winapi::INVALID_HANDLE_VALUE_);
}
~file_descriptor()
{
if (_handle != ::boost::winapi::INVALID_HANDLE_VALUE_)
::boost::winapi::CloseHandle(_handle);
}
::boost::winapi::HANDLE_ handle() const { return _handle;}
private:
::boost::winapi::HANDLE_ _handle = ::boost::winapi::INVALID_HANDLE_VALUE_;
};
}}}}
#endif /* BOOST_PROCESS_DETAIL_WINDOWS_FILE_DESCRIPTOR_HPP_ */
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