1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
use nix::{
errno::Errno,
poll::{poll, PollFd, PollFlags, PollTimeout},
unistd::{pipe, write},
};
use std::os::unix::io::{AsFd, BorrowedFd};
macro_rules! loop_while_eintr {
($poll_expr: expr) => {
loop {
match $poll_expr {
Ok(nfds) => break nfds,
Err(Errno::EINTR) => (),
Err(e) => panic!("{}", e),
}
}
};
}
#[test]
fn test_poll() {
let (r, w) = pipe().unwrap();
let mut fds = [PollFd::new(r.as_fd(), PollFlags::POLLIN)];
// Poll an idle pipe. Should timeout
let nfds = loop_while_eintr!(poll(&mut fds, PollTimeout::from(100u8)));
assert_eq!(nfds, 0);
assert!(!fds[0].revents().unwrap().contains(PollFlags::POLLIN));
write(&w, b".").unwrap();
// Poll a readable pipe. Should return an event.
let nfds = poll(&mut fds, PollTimeout::from(100u8)).unwrap();
assert_eq!(nfds, 1);
assert!(fds[0].revents().unwrap().contains(PollFlags::POLLIN));
}
// ppoll(2) is the same as poll except for how it handles timeouts and signals.
// Repeating the test for poll(2) should be sufficient to check that our
// bindings are correct.
#[cfg(any(linux_android, freebsdlike))]
#[test]
fn test_ppoll() {
use nix::poll::ppoll;
use nix::sys::signal::SigSet;
use nix::sys::time::{TimeSpec, TimeValLike};
let timeout = TimeSpec::milliseconds(1);
let (r, w) = pipe().unwrap();
let mut fds = [PollFd::new(r.as_fd(), PollFlags::POLLIN)];
// Poll an idle pipe. Should timeout
let sigset = SigSet::empty();
let nfds = loop_while_eintr!(ppoll(&mut fds, Some(timeout), Some(sigset)));
assert_eq!(nfds, 0);
assert!(!fds[0].revents().unwrap().contains(PollFlags::POLLIN));
write(&w, b".").unwrap();
// Poll a readable pipe. Should return an event.
let nfds = ppoll(&mut fds, Some(timeout), None).unwrap();
assert_eq!(nfds, 1);
assert!(fds[0].revents().unwrap().contains(PollFlags::POLLIN));
}
#[test]
fn test_pollfd_events() {
let fd_zero = unsafe { BorrowedFd::borrow_raw(0) };
let mut pfd = PollFd::new(fd_zero.as_fd(), PollFlags::POLLIN);
assert_eq!(pfd.events(), PollFlags::POLLIN);
pfd.set_events(PollFlags::POLLOUT);
assert_eq!(pfd.events(), PollFlags::POLLOUT);
}
|
