1 //! Windows system calls in the `io` module.
2
3 use super::super::c;
4 use super::super::conv::{borrowed_fd, ret, ret_c_int};
5 use super::super::fd::LibcFd;
6 use crate::fd::{BorrowedFd, RawFd};
7 use crate::io;
8 use crate::io::PollFd;
9 use core::convert::TryInto;
10 use core::mem::MaybeUninit;
11
close(raw_fd: RawFd)12 pub(crate) unsafe fn close(raw_fd: RawFd) {
13 let _ = c::close(raw_fd as LibcFd);
14 }
15
ioctl_fionread(fd: BorrowedFd<'_>) -> io::Result<u64>16 pub(crate) fn ioctl_fionread(fd: BorrowedFd<'_>) -> io::Result<u64> {
17 let mut nread = MaybeUninit::<c::c_ulong>::uninit();
18 unsafe {
19 ret(c::ioctl(borrowed_fd(fd), c::FIONREAD, nread.as_mut_ptr()))?;
20 Ok(u64::from(nread.assume_init()))
21 }
22 }
23
ioctl_fionbio(fd: BorrowedFd<'_>, value: bool) -> io::Result<()>24 pub(crate) fn ioctl_fionbio(fd: BorrowedFd<'_>, value: bool) -> io::Result<()> {
25 unsafe {
26 let mut data = value as c::c_uint;
27 ret(c::ioctl(borrowed_fd(fd), c::FIONBIO, &mut data))
28 }
29 }
30
poll(fds: &mut [PollFd<'_>], timeout: c::c_int) -> io::Result<usize>31 pub(crate) fn poll(fds: &mut [PollFd<'_>], timeout: c::c_int) -> io::Result<usize> {
32 let nfds = fds
33 .len()
34 .try_into()
35 .map_err(|_convert_err| io::Errno::INVAL)?;
36
37 ret_c_int(unsafe { c::poll(fds.as_mut_ptr().cast(), nfds, timeout) })
38 .map(|nready| nready as usize)
39 }
40