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include/boost/process/v1/detail/windows/async_out.hpp Normal file
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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)
#ifndef BOOST_PROCESS_WINDOWS_INITIALIZERS_ASYNC_OUT_HPP
#define BOOST_PROCESS_WINDOWS_INITIALIZERS_ASYNC_OUT_HPP
#include <boost/winapi/process.hpp>
#include <boost/winapi/handles.hpp>
#include <boost/winapi/handle_info.hpp>
#include <boost/winapi/error_codes.hpp>
#include <boost/asio/read.hpp>
#include <boost/process/v1/detail/handler_base.hpp>
#include <boost/process/v1/detail/used_handles.hpp>
#include <boost/process/v1/detail/windows/asio_fwd.hpp>
#include <istream>
#include <memory>
#include <exception>
#include <future>
namespace boost { namespace process { BOOST_PROCESS_V1_INLINE namespace v1 { namespace detail { namespace windows {
template <typename Executor>
inline void apply_out_handles(Executor &e, void* handle, std::integral_constant<int, 1>, std::integral_constant<int, -1>)
{
boost::winapi::SetHandleInformation(handle,
boost::winapi::HANDLE_FLAG_INHERIT_,
boost::winapi::HANDLE_FLAG_INHERIT_);
e.startup_info.hStdOutput = handle;
e.startup_info.dwFlags |= ::boost::winapi::STARTF_USESTDHANDLES_;
e.inherit_handles = true;
}
template <typename Executor>
inline void apply_out_handles(Executor &e, void* handle, std::integral_constant<int, 2>, std::integral_constant<int, -1>)
{
boost::winapi::SetHandleInformation(handle,
boost::winapi::HANDLE_FLAG_INHERIT_,
boost::winapi::HANDLE_FLAG_INHERIT_);
e.startup_info.hStdError = handle;
e.startup_info.dwFlags |= ::boost::winapi::STARTF_USESTDHANDLES_;
e.inherit_handles = true;
}
template <typename Executor>
inline void apply_out_handles(Executor &e, void* handle, std::integral_constant<int, 1>, std::integral_constant<int, 2>)
{
boost::winapi::SetHandleInformation(handle,
boost::winapi::HANDLE_FLAG_INHERIT_,
boost::winapi::HANDLE_FLAG_INHERIT_);
e.startup_info.hStdOutput = handle;
e.startup_info.hStdError = handle;
e.startup_info.dwFlags |= ::boost::winapi::STARTF_USESTDHANDLES_;
e.inherit_handles = true;
}
template<int p1, int p2, typename Buffer>
struct async_out_buffer : ::boost::process::v1::detail::windows::handler_base_ext,
::boost::process::v1::detail::windows::require_io_context
{
Buffer & buf;
std::shared_ptr<boost::process::v1::async_pipe> pipe;
async_out_buffer(Buffer & buf) : buf(buf)
{
}
template <typename Executor>
inline void on_success(Executor&)
{
auto pipe_ = this->pipe;
boost::asio::async_read(*pipe_, buf,
[pipe_](const boost::system::error_code&, std::size_t){});
std::move(*pipe_).sink().close();
this->pipe = nullptr;
}
template<typename Executor>
void on_error(Executor &, const std::error_code &) const
{
std::move(*pipe).sink().close();
}
template <typename WindowsExecutor>
void on_setup(WindowsExecutor &exec)
{
if (!pipe)
pipe = std::make_shared<boost::process::v1::async_pipe>(get_io_context(exec.seq));
apply_out_handles(exec, std::move(*pipe).sink().native_handle(),
std::integral_constant<int, p1>(), std::integral_constant<int, p2>());
}
};
template<int p1, int p2, typename Type>
struct async_out_future : ::boost::process::v1::detail::windows::handler_base_ext,
::boost::process::v1::detail::windows::require_io_context,
::boost::process::v1::detail::uses_handles
{
std::shared_ptr<boost::process::v1::async_pipe> pipe;
std::shared_ptr<std::promise<Type>> promise = std::make_shared<std::promise<Type>>();
std::shared_ptr<boost::asio::streambuf> buffer = std::make_shared<boost::asio::streambuf>();
::boost::winapi::HANDLE_ get_used_handles() const
{
return std::move(*pipe).sink().native_handle();
}
async_out_future(std::future<Type> & fut)
{
fut = promise->get_future();
}
template <typename Executor>
inline void on_success(Executor&)
{
auto pipe_ = this->pipe;
auto buffer_ = this->buffer;
auto promise_ = this->promise;
std::move(*pipe_).sink().close();
boost::asio::async_read(*pipe_, *buffer_,
[pipe_, buffer_, promise_](const boost::system::error_code& ec, std::size_t)
{
if (ec && (ec.value() != ::boost::winapi::ERROR_BROKEN_PIPE_))
{
std::error_code e(ec.value(), std::system_category());
promise_->set_exception(std::make_exception_ptr(process_error(e)));
}
else
{
std::istream is (buffer_.get());
Type arg;
if (buffer_->size() > 0)
{
arg.resize(buffer_->size());
is.read(&*arg.begin(), buffer_->size());
}
promise_->set_value(std::move(arg));
}
});
this->pipe = nullptr;
this->buffer = nullptr;
this->promise = nullptr;
}
template<typename Executor>
void on_error(Executor &, const std::error_code &) const
{
std::move(*pipe).sink().close();
}
template <typename WindowsExecutor>
void on_setup(WindowsExecutor &exec)
{
if (!pipe)
pipe = std::make_shared<boost::process::v1::async_pipe>(get_io_context(exec.seq));
apply_out_handles(exec, std::move(*pipe).sink().native_handle(),
std::integral_constant<int, p1>(), std::integral_constant<int, p2>());
}
};
}}}}}
#endif