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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_DETAIL_POSIX_ASYNC_OUT_HPP
#define BOOST_PROCESS_DETAIL_POSIX_ASYNC_OUT_HPP
#include <boost/process/detail/posix/handler.hpp>
#include <boost/asio/posix/stream_descriptor.hpp>
#include <boost/asio/read.hpp>
#include <boost/process/async_pipe.hpp>
#include <istream>
#include <memory>
#include <exception>
#include <future>
namespace boost { namespace process { namespace detail { namespace posix {
inline int apply_out_handles(int handle, std::integral_constant<int, 1>, std::integral_constant<int, -1>)
{
return ::dup2(handle, STDOUT_FILENO);
}
inline int apply_out_handles(int handle, std::integral_constant<int, 2>, std::integral_constant<int, -1>)
{
return ::dup2(handle, STDERR_FILENO);
}
inline int apply_out_handles(int handle, std::integral_constant<int, 1>, std::integral_constant<int, 2>)
{
if (::dup2(handle, STDOUT_FILENO) == -1)
return -1;
if (::dup2(handle, STDERR_FILENO) == -1)
return -1;
return 0;
}
template<int p1, int p2, typename Buffer>
struct async_out_buffer : ::boost::process::detail::posix::handler_base_ext,
::boost::process::detail::posix::require_io_service
{
Buffer & buf;
std::shared_ptr<boost::process::async_pipe> pipe;
async_out_buffer(Buffer & buf) : buf(buf)
{
}
template <typename Executor>
inline void on_success(Executor &exec)
{
auto pipe = this->pipe;
boost::asio::async_read(*pipe, buf,
[pipe](const boost::system::error_code&, std::size_t size){});
this->pipe = nullptr;
std::move(*pipe).sink().close();
}
template<typename Executor>
void on_error(Executor &, const std::error_code &) const
{
std::move(*pipe).sink().close();
}
template<typename Executor>
void on_setup(Executor & exec)
{
pipe = std::make_shared<boost::process::async_pipe>(get_io_service(exec.seq));
}
template <typename Executor>
void on_exec_setup(Executor &exec)
{
int res = apply_out_handles(pipe->native_sink(),
std::integral_constant<int, p1>(), std::integral_constant<int, p2>());
if (res == -1)
exec.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
::close(pipe->native_sink());
}
};
template<int p1, int p2, typename Type>
struct async_out_future : ::boost::process::detail::posix::handler_base_ext,
::boost::process::detail::posix::require_io_service
{
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>();
std::shared_ptr<boost::process::async_pipe> pipe;
async_out_future(std::future<Type> & fut)
{
fut = promise->get_future();
}
template <typename Executor>
inline void on_success(Executor &exec)
{
auto pipe = this->pipe;
auto buffer = this->buffer;
auto promise = this->promise;
boost::asio::async_read(*pipe, *buffer,
[pipe, buffer, promise](const boost::system::error_code& ec, std::size_t size)
{
if (ec && (ec.value() != ENOENT))
{
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;
arg.resize(buffer->size());
is.read(&*arg.begin(), buffer->size());
promise->set_value(std::move(arg));
}
});
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 Executor>
void on_setup(Executor & exec)
{
pipe = std::make_shared<boost::process::async_pipe>(get_io_service(exec.seq));
}
template <typename Executor>
void on_exec_setup(Executor &exec)
{
int res = apply_out_handles(pipe->native_sink(),
std::integral_constant<int, p1>(), std::integral_constant<int, p2>());
if (res == -1)
exec.set_error(::boost::process::detail::get_last_error(), "dup2() failed");
::close(pipe->native_sink());
}
};
}}}}
#endif
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