141 lines
3.7 KiB
C++
141 lines
3.7 KiB
C++
//
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// detail/impl/io_uring_file_service.ipp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2023 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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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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//
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#ifndef ASIO_DETAIL_IMPL_IO_URING_FILE_SERVICE_IPP
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#define ASIO_DETAIL_IMPL_IO_URING_FILE_SERVICE_IPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if defined(ASIO_HAS_FILE) \
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&& defined(ASIO_HAS_IO_URING)
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#include <cstring>
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#include <sys/stat.h>
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#include "asio/detail/io_uring_file_service.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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io_uring_file_service::io_uring_file_service(
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execution_context& context)
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: execution_context_service_base<io_uring_file_service>(context),
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descriptor_service_(context)
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{
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}
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void io_uring_file_service::shutdown()
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{
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descriptor_service_.shutdown();
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}
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asio::error_code io_uring_file_service::open(
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io_uring_file_service::implementation_type& impl,
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const char* path, file_base::flags open_flags,
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asio::error_code& ec)
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{
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if (is_open(impl))
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{
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ec = asio::error::already_open;
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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descriptor_ops::state_type state = 0;
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int fd = descriptor_ops::open(path, static_cast<int>(open_flags), 0777, ec);
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if (fd < 0)
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{
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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// We're done. Take ownership of the serial port descriptor.
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if (descriptor_service_.assign(impl, fd, ec))
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{
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asio::error_code ignored_ec;
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descriptor_ops::close(fd, state, ignored_ec);
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}
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(void)::posix_fadvise(native_handle(impl), 0, 0,
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impl.is_stream_ ? POSIX_FADV_SEQUENTIAL : POSIX_FADV_RANDOM);
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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uint64_t io_uring_file_service::size(
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const io_uring_file_service::implementation_type& impl,
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asio::error_code& ec) const
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{
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struct stat s;
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int result = ::fstat(native_handle(impl), &s);
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descriptor_ops::get_last_error(ec, result != 0);
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ASIO_ERROR_LOCATION(ec);
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return !ec ? s.st_size : 0;
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}
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asio::error_code io_uring_file_service::resize(
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io_uring_file_service::implementation_type& impl,
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uint64_t n, asio::error_code& ec)
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{
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int result = ::ftruncate(native_handle(impl), n);
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descriptor_ops::get_last_error(ec, result != 0);
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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asio::error_code io_uring_file_service::sync_all(
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io_uring_file_service::implementation_type& impl,
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asio::error_code& ec)
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{
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int result = ::fsync(native_handle(impl));
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descriptor_ops::get_last_error(ec, result != 0);
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return ec;
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}
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asio::error_code io_uring_file_service::sync_data(
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io_uring_file_service::implementation_type& impl,
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asio::error_code& ec)
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{
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#if defined(_POSIX_SYNCHRONIZED_IO)
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int result = ::fdatasync(native_handle(impl));
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#else // defined(_POSIX_SYNCHRONIZED_IO)
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int result = ::fsync(native_handle(impl));
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#endif // defined(_POSIX_SYNCHRONIZED_IO)
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descriptor_ops::get_last_error(ec, result != 0);
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ASIO_ERROR_LOCATION(ec);
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return ec;
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}
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uint64_t io_uring_file_service::seek(
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io_uring_file_service::implementation_type& impl, int64_t offset,
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file_base::seek_basis whence, asio::error_code& ec)
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{
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int64_t result = ::lseek(native_handle(impl), offset, whence);
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descriptor_ops::get_last_error(ec, result < 0);
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ASIO_ERROR_LOCATION(ec);
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return !ec ? static_cast<uint64_t>(result) : 0;
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}
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} // namespace detail
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // defined(ASIO_HAS_FILE)
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// && defined(ASIO_HAS_IO_URING)
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#endif // ASIO_DETAIL_IMPL_IO_URING_FILE_SERVICE_IPP
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