boost/asio/detail/impl/io_uring_file_service.ipp
//
// detail/impl/io_uring_file_service.ipp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2024 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// 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_ASIO_DETAIL_IMPL_IO_URING_FILE_SERVICE_IPP
#define BOOST_ASIO_DETAIL_IMPL_IO_URING_FILE_SERVICE_IPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#if defined(BOOST_ASIO_HAS_FILE) \
&& defined(BOOST_ASIO_HAS_IO_URING)
#include <cstring>
#include <sys/stat.h>
#include <boost/asio/detail/io_uring_file_service.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
io_uring_file_service::io_uring_file_service(
execution_context& context)
: execution_context_service_base<io_uring_file_service>(context),
descriptor_service_(context)
{
}
void io_uring_file_service::shutdown()
{
descriptor_service_.shutdown();
}
boost::system::error_code io_uring_file_service::open(
io_uring_file_service::implementation_type& impl,
const char* path, file_base::flags open_flags,
boost::system::error_code& ec)
{
if (is_open(impl))
{
ec = boost::asio::error::already_open;
BOOST_ASIO_ERROR_LOCATION(ec);
return ec;
}
descriptor_ops::state_type state = 0;
int fd = descriptor_ops::open(path, static_cast<int>(open_flags), 0777, ec);
if (fd < 0)
{
BOOST_ASIO_ERROR_LOCATION(ec);
return ec;
}
// We're done. Take ownership of the serial port descriptor.
if (descriptor_service_.assign(impl, fd, ec))
{
boost::system::error_code ignored_ec;
descriptor_ops::close(fd, state, ignored_ec);
}
(void)::posix_fadvise(native_handle(impl), 0, 0,
impl.is_stream_ ? POSIX_FADV_SEQUENTIAL : POSIX_FADV_RANDOM);
BOOST_ASIO_ERROR_LOCATION(ec);
return ec;
}
uint64_t io_uring_file_service::size(
const io_uring_file_service::implementation_type& impl,
boost::system::error_code& ec) const
{
struct stat s;
int result = ::fstat(native_handle(impl), &s);
descriptor_ops::get_last_error(ec, result != 0);
BOOST_ASIO_ERROR_LOCATION(ec);
return !ec ? s.st_size : 0;
}
boost::system::error_code io_uring_file_service::resize(
io_uring_file_service::implementation_type& impl,
uint64_t n, boost::system::error_code& ec)
{
int result = ::ftruncate(native_handle(impl), n);
descriptor_ops::get_last_error(ec, result != 0);
BOOST_ASIO_ERROR_LOCATION(ec);
return ec;
}
boost::system::error_code io_uring_file_service::sync_all(
io_uring_file_service::implementation_type& impl,
boost::system::error_code& ec)
{
int result = ::fsync(native_handle(impl));
descriptor_ops::get_last_error(ec, result != 0);
return ec;
}
boost::system::error_code io_uring_file_service::sync_data(
io_uring_file_service::implementation_type& impl,
boost::system::error_code& ec)
{
#if defined(_POSIX_SYNCHRONIZED_IO)
int result = ::fdatasync(native_handle(impl));
#else // defined(_POSIX_SYNCHRONIZED_IO)
int result = ::fsync(native_handle(impl));
#endif // defined(_POSIX_SYNCHRONIZED_IO)
descriptor_ops::get_last_error(ec, result != 0);
BOOST_ASIO_ERROR_LOCATION(ec);
return ec;
}
uint64_t io_uring_file_service::seek(
io_uring_file_service::implementation_type& impl, int64_t offset,
file_base::seek_basis whence, boost::system::error_code& ec)
{
int64_t result = ::lseek(native_handle(impl), offset, whence);
descriptor_ops::get_last_error(ec, result < 0);
BOOST_ASIO_ERROR_LOCATION(ec);
return !ec ? static_cast<uint64_t>(result) : 0;
}
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // defined(BOOST_ASIO_HAS_FILE)
// && defined(BOOST_ASIO_HAS_IO_URING)
#endif // BOOST_ASIO_DETAIL_IMPL_IO_URING_FILE_SERVICE_IPP