123 lines
3.7 KiB
C++
123 lines
3.7 KiB
C++
// Copyright (c) 2016 Klemens D. Morgenstern
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#ifndef BOOST_PROCESS_DETAIL_WINDOWS_FILE_DESCRIPTOR_HPP_
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#define BOOST_PROCESS_DETAIL_WINDOWS_FILE_DESCRIPTOR_HPP_
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#include <boost/winapi/basic_types.hpp>
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#include <boost/winapi/handles.hpp>
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#include <boost/winapi/file_management.hpp>
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#include <string>
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#include <boost/process/filesystem.hpp>
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#include <boost/core/exchange.hpp>
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namespace boost { namespace process { namespace detail { namespace windows {
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struct file_descriptor
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{
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enum mode_t
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{
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read = 1,
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write = 2,
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read_write = 3
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};
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static ::boost::winapi::DWORD_ desired_access(mode_t mode)
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{
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switch(mode)
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{
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case read:
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return ::boost::winapi::GENERIC_READ_;
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case write:
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return ::boost::winapi::GENERIC_WRITE_;
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case read_write:
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return ::boost::winapi::GENERIC_READ_
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| ::boost::winapi::GENERIC_WRITE_;
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default:
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return 0u;
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}
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}
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file_descriptor() = default;
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file_descriptor(const boost::process::filesystem::path& p, mode_t mode = read_write)
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: file_descriptor(p.native(), mode)
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{
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}
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file_descriptor(const std::string & path , mode_t mode = read_write)
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#if defined(BOOST_NO_ANSI_APIS)
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: file_descriptor(::boost::process::detail::convert(path), mode)
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#else
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: file_descriptor(path.c_str(), mode)
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#endif
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{}
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file_descriptor(const std::wstring & path, mode_t mode = read_write)
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: file_descriptor(path.c_str(), mode) {}
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file_descriptor(const char* path, mode_t mode = read_write)
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#if defined(BOOST_NO_ANSI_APIS)
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: file_descriptor(std::string(path), mode)
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#else
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: _handle(
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::boost::winapi::create_file(
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path,
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desired_access(mode),
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::boost::winapi::FILE_SHARE_READ_ |
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::boost::winapi::FILE_SHARE_WRITE_,
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nullptr,
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::boost::winapi::OPEN_ALWAYS_,
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::boost::winapi::FILE_ATTRIBUTE_NORMAL_,
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nullptr
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))
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#endif
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{
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}
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file_descriptor(const wchar_t * path, mode_t mode = read_write)
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: _handle(
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::boost::winapi::create_file(
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path,
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desired_access(mode),
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::boost::winapi::FILE_SHARE_READ_ |
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::boost::winapi::FILE_SHARE_WRITE_,
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nullptr,
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::boost::winapi::OPEN_ALWAYS_,
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::boost::winapi::FILE_ATTRIBUTE_NORMAL_,
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nullptr
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))
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{
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}
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file_descriptor(const file_descriptor & ) = delete;
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file_descriptor(file_descriptor &&other)
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: _handle( boost::exchange(other._handle, ::boost::winapi::INVALID_HANDLE_VALUE_) )
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{
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}
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file_descriptor& operator=(const file_descriptor & ) = delete;
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file_descriptor& operator=(file_descriptor &&other)
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{
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if (_handle != ::boost::winapi::INVALID_HANDLE_VALUE_)
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::boost::winapi::CloseHandle(_handle);
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_handle = boost::exchange(other._handle, ::boost::winapi::INVALID_HANDLE_VALUE_);
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return *this;
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}
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~file_descriptor()
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{
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if (_handle != ::boost::winapi::INVALID_HANDLE_VALUE_)
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::boost::winapi::CloseHandle(_handle);
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}
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::boost::winapi::HANDLE_ handle() const { return _handle;}
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private:
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::boost::winapi::HANDLE_ _handle = ::boost::winapi::INVALID_HANDLE_VALUE_;
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};
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}}}}
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#endif /* BOOST_PROCESS_DETAIL_WINDOWS_FILE_DESCRIPTOR_HPP_ */
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