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use nix::poll::{PollFlags, poll, PollFd};
use nix::unistd::{write, pipe, close};
#[test]
fn test_poll() {
let (r, w) = pipe().unwrap();
let mut fds = [PollFd::new(r, PollFlags::POLLIN)];
// Poll an idle pipe. Should timeout
let nfds = poll(&mut fds, 100).unwrap();
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, 100).unwrap();
assert_eq!(nfds, 1);
assert!(fds[0].revents().unwrap().contains(PollFlags::POLLIN));
}
#[test]
fn test_poll_debug() {
assert_eq!(format!("{:?}", PollFd::new(0, PollFlags::empty())),
"PollFd { fd: 0, events: (empty), revents: (empty) }");
assert_eq!(format!("{:?}", PollFd::new(1, PollFlags::POLLIN)),
"PollFd { fd: 1, events: POLLIN, revents: (empty) }");
// Testing revents requires doing some I/O
let (r, w) = pipe().unwrap();
let mut fds = [PollFd::new(r, PollFlags::POLLIN)];
write(w, b" ").unwrap();
close(w).unwrap();
poll(&mut fds, -1).unwrap();
assert_eq!(format!("{:?}", fds[0]),
format!("PollFd {{ fd: {}, events: POLLIN, revents: POLLIN | POLLHUP }}", r));
close(r).unwrap();
}
// 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(target_os = "android",
target_os = "dragonfly",
target_os = "freebsd",
target_os = "linux"))]
#[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, PollFlags::POLLIN)];
// Poll an idle pipe. Should timeout
let nfds = ppoll(&mut fds, timeout, SigSet::empty()).unwrap();
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, timeout, SigSet::empty()).unwrap();
assert_eq!(nfds, 1);
assert!(fds[0].revents().unwrap().contains(PollFlags::POLLIN));
}
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