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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_PIPE_HPP
#define BOOST_PROCESS_DETAIL_WINDOWS_PIPE_HPP
#include <boost/detail/winapi/basic_types.hpp>
#include <boost/detail/winapi/error_codes.hpp>
#include <boost/detail/winapi/pipes.hpp>
#include <boost/detail/winapi/handles.hpp>
#include <boost/detail/winapi/file_management.hpp>
#include <boost/detail/winapi/get_last_error.hpp>
#include <boost/detail/winapi/access_rights.hpp>
#include <boost/detail/winapi/process.hpp>
#include <boost/process/detail/windows/compare_handles.hpp>
#include <system_error>
#include <string>
namespace boost { namespace process { namespace detail { namespace windows {
template<class CharT, class Traits = std::char_traits<CharT>>
class basic_pipe
{
::boost::detail::winapi::HANDLE_ _source = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
::boost::detail::winapi::HANDLE_ _sink = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
public:
typedef CharT char_type ;
typedef Traits traits_type;
typedef typename Traits::int_type int_type ;
typedef typename Traits::pos_type pos_type ;
typedef typename Traits::off_type off_type ;
typedef ::boost::detail::winapi::HANDLE_ native_handle_type;
explicit basic_pipe(::boost::detail::winapi::HANDLE_ source, ::boost::detail::winapi::HANDLE_ sink)
: _source(source), _sink(sink) {}
inline explicit basic_pipe(const std::string & name);
inline basic_pipe(const basic_pipe& p);
basic_pipe(basic_pipe&& lhs) : _source(lhs._source), _sink(lhs._sink)
{
lhs._source = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
lhs._sink = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
}
inline basic_pipe& operator=(const basic_pipe& p);
inline basic_pipe& operator=(basic_pipe&& lhs);
~basic_pipe()
{
if (_sink != ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
::boost::detail::winapi::CloseHandle(_sink);
if (_source != ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
::boost::detail::winapi::CloseHandle(_source);
}
native_handle_type native_source() const {return _source;}
native_handle_type native_sink () const {return _sink;}
void assign_source(native_handle_type h) { _source = h;}
void assign_sink (native_handle_type h) { _sink = h;}
basic_pipe()
{
if (!::boost::detail::winapi::CreatePipe(&_source, &_sink, nullptr, 0))
throw_last_error("CreatePipe() failed");
}
int_type write(const char_type * data, int_type count)
{
::boost::detail::winapi::DWORD_ write_len;
if (!::boost::detail::winapi::WriteFile(
_sink, data, count * sizeof(char_type), &write_len, nullptr
))
{
auto ec = ::boost::process::detail::get_last_error();
if ((ec.value() == ::boost::detail::winapi::ERROR_BROKEN_PIPE_) ||
(ec.value() == ::boost::detail::winapi::ERROR_NO_DATA_))
return 0;
else
throw process_error(ec, "WriteFile failed");
}
return static_cast<int_type>(write_len);
}
int_type read(char_type * data, int_type count)
{
::boost::detail::winapi::DWORD_ read_len;
if (!::boost::detail::winapi::ReadFile(
_source, data, count * sizeof(char_type), &read_len, nullptr
))
{
auto ec = ::boost::process::detail::get_last_error();
if ((ec.value() == ::boost::detail::winapi::ERROR_BROKEN_PIPE_) ||
(ec.value() == ::boost::detail::winapi::ERROR_NO_DATA_))
return 0;
else
throw process_error(ec, "ReadFile failed");
}
return static_cast<int_type>(read_len);
}
bool is_open()
{
return (_source != ::boost::detail::winapi::INVALID_HANDLE_VALUE_) ||
(_sink != ::boost::detail::winapi::INVALID_HANDLE_VALUE_);
}
void close()
{
::boost::detail::winapi::CloseHandle(_source);
::boost::detail::winapi::CloseHandle(_sink);
_source = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
_sink = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
}
};
template<class Char, class Traits>
basic_pipe<Char, Traits>::basic_pipe(const basic_pipe & p)
{
auto proc = ::boost::detail::winapi::GetCurrentProcess();
if (p._source == ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
_source = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
else if (!::boost::detail::winapi::DuplicateHandle(
proc, p._source, proc, &_source, 0,
static_cast<::boost::detail::winapi::BOOL_>(true),
::boost::detail::winapi::DUPLICATE_SAME_ACCESS_))
throw_last_error("Duplicate Pipe Failed");
if (p._sink == ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
_sink = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
else if (!::boost::detail::winapi::DuplicateHandle(
proc, p._sink, proc, &_sink, 0,
static_cast<::boost::detail::winapi::BOOL_>(true),
::boost::detail::winapi::DUPLICATE_SAME_ACCESS_))
throw_last_error("Duplicate Pipe Failed");
}
template<class Char, class Traits>
basic_pipe<Char, Traits>::basic_pipe(const std::string & name)
{
static constexpr int OPEN_EXISTING_ = 3; //temporary.
static constexpr int FILE_FLAG_OVERLAPPED_ = 0x40000000; //temporary
//static constexpr int FILE_ATTRIBUTE_NORMAL_ = 0x00000080; //temporary
::boost::detail::winapi::HANDLE_ source = ::boost::detail::winapi::create_named_pipe(
name.c_str(),
::boost::detail::winapi::PIPE_ACCESS_INBOUND_
| FILE_FLAG_OVERLAPPED_, //write flag
0, 1, 8192, 8192, 0, nullptr);
if (source == boost::detail::winapi::INVALID_HANDLE_VALUE_)
::boost::process::detail::throw_last_error("create_named_pipe() failed");
::boost::detail::winapi::HANDLE_ sink = boost::detail::winapi::create_file(
name.c_str(),
::boost::detail::winapi::GENERIC_WRITE_, 0, nullptr,
OPEN_EXISTING_,
FILE_FLAG_OVERLAPPED_, //to allow read
nullptr);
if (sink == ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
::boost::process::detail::throw_last_error("create_file() failed");
_source = source;
_sink = sink;
}
template<class Char, class Traits>
basic_pipe<Char, Traits>& basic_pipe<Char, Traits>::operator=(const basic_pipe & p)
{
auto proc = ::boost::detail::winapi::GetCurrentProcess();
if (p._source == ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
_source = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
else if (!::boost::detail::winapi::DuplicateHandle(
proc, p._source, proc, &_source, 0,
static_cast<::boost::detail::winapi::BOOL_>(true),
::boost::detail::winapi::DUPLICATE_SAME_ACCESS_))
throw_last_error("Duplicate Pipe Failed");
if (p._sink == ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
_sink = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
else if (!::boost::detail::winapi::DuplicateHandle(
proc, p._sink, proc, &_sink, 0,
static_cast<::boost::detail::winapi::BOOL_>(true),
::boost::detail::winapi::DUPLICATE_SAME_ACCESS_))
throw_last_error("Duplicate Pipe Failed");
return *this;
}
template<class Char, class Traits>
basic_pipe<Char, Traits>& basic_pipe<Char, Traits>::operator=(basic_pipe && lhs)
{
if (_source != ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
::boost::detail::winapi::CloseHandle(_source);
if (_sink != ::boost::detail::winapi::INVALID_HANDLE_VALUE_)
::boost::detail::winapi::CloseHandle(_sink);
_source = lhs._source;
_sink = lhs._sink;
lhs._source = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
lhs._sink = ::boost::detail::winapi::INVALID_HANDLE_VALUE_;
return *this;
}
template<class Char, class Traits>
inline bool operator==(const basic_pipe<Char, Traits> & lhs, const basic_pipe<Char, Traits> & rhs)
{
return compare_handles(lhs.native_source(), rhs.native_source()) &&
compare_handles(lhs.native_sink(), rhs.native_sink());
}
template<class Char, class Traits>
inline bool operator!=(const basic_pipe<Char, Traits> & lhs, const basic_pipe<Char, Traits> & rhs)
{
return !compare_handles(lhs.native_source(), rhs.native_source()) ||
!compare_handles(lhs.native_sink(), rhs.native_sink());
}
}}}}
#endif
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