MySQL  8.0.22
Source Code Documentation
poll.h
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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 
42 namespace net {
43 namespace impl {
44 namespace poll {
45 
46 #ifdef _WIN32
47 using poll_fd = WSAPOLLFD;
48 #else
49 using poll_fd = pollfd;
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
std::error_code make_error_code(net::stream_errc e) noexcept
Definition: buffer.h:75
Definition: authentication.cc:36
#define SOCKET_ERROR
Definition: x_platform.h:283
struct pollfd pollfd
Definition: task_os.h:111
pollfd poll_fd
Definition: poll.h:49
Definition: buffer.h:39
stdx::expected< size_t, std::error_code > poll(poll_fd *fds, size_t num_fds, std::chrono::milliseconds timeout)
Definition: poll.h:52
Definition: expected.h:991
constexpr auto make_unexpected(E &&e) -> unexpected< std::decay_t< E >>
Definition: expected.h:99
std::error_code last_error_code()
get last std::error_code for socket-errors.
Definition: socket_error.h:106