MySQL 8.0.32
Source Code Documentation
poll.h
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1/*
2 Copyright (c) 2019, 2022, Oracle and/or its affiliates.
3
4 This program is free software; you can redistribute it and/or modify
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6 as published by the Free Software Foundation.
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9 but not limited to OpenSSL) that is licensed under separate terms,
10 as designated in a particular file or component or in included license
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13 separately licensed software that they have included with MySQL.
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16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
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22 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23*/
24
25#ifndef MYSQL_HARNESS_NET_TS_IMPL_POLL_H_
26#define MYSQL_HARNESS_NET_TS_IMPL_POLL_H_
27
28#include <array>
29#include <chrono>
30#include <system_error>
31
32#ifdef _WIN32
33#include <WinSock2.h>
34#include <Windows.h>
35#else
36#include <poll.h> // poll
37#endif
38
41
42namespace net {
43namespace impl {
44namespace poll {
45
46#ifdef _WIN32
47using poll_fd = WSAPOLLFD;
48#else
50#endif
51
53 poll_fd *fds, size_t num_fds, std::chrono::milliseconds timeout) {
54#ifdef _WIN32
55 constexpr const auto err_res{SOCKET_ERROR};
56 auto res = ::WSAPoll(fds, num_fds, timeout.count());
57#else
58 constexpr const auto err_res{-1};
59 auto res = ::poll(fds, num_fds, timeout.count());
60#endif
61
62 if (res == err_res) {
64 }
65 if (0 == res) {
66 return stdx::make_unexpected(make_error_code(std::errc::timed_out));
67 }
68
69 return res;
70}
71} // namespace poll
72} // namespace impl
73} // namespace net
74
75#endif
Definition: authentication.cc:35
static bool timeout(bool(*wait_condition)())
Timeout function.
Definition: log0meb.cc:495
pollfd poll_fd
Definition: poll.h:49
stdx::expected< size_t, std::error_code > poll(poll_fd *fds, size_t num_fds, std::chrono::milliseconds timeout)
Definition: poll.h:52
std::error_code last_error_code()
get last std::error_code for socket-errors.
Definition: socket_error.h:106
Definition: buffer.h:43
std::error_code make_error_code(net::stream_errc e) noexcept
Definition: buffer.h:101
constexpr auto make_unexpected(E &&e) -> unexpected< std::decay_t< E > >
Definition: expected.h:124
struct pollfd pollfd
Definition: task_os.h:113
#define SOCKET_ERROR
Definition: x_platform.h:283