1 use nix::{
2 errno::Errno,
3 poll::{PollFlags, poll, PollFd},
4 unistd::{write, pipe}
5 };
6
7 macro_rules! loop_while_eintr {
8 ($poll_expr: expr) => {
9 loop {
10 match $poll_expr {
11 Ok(nfds) => break nfds,
12 Err(Errno::EINTR) => (),
13 Err(e) => panic!("{}", e)
14 }
15 }
16 }
17 }
18
19 #[test]
test_poll()20 fn test_poll() {
21 let (r, w) = pipe().unwrap();
22 let mut fds = [PollFd::new(r, PollFlags::POLLIN)];
23
24 // Poll an idle pipe. Should timeout
25 let nfds = loop_while_eintr!(poll(&mut fds, 100));
26 assert_eq!(nfds, 0);
27 assert!(!fds[0].revents().unwrap().contains(PollFlags::POLLIN));
28
29 write(w, b".").unwrap();
30
31 // Poll a readable pipe. Should return an event.
32 let nfds = poll(&mut fds, 100).unwrap();
33 assert_eq!(nfds, 1);
34 assert!(fds[0].revents().unwrap().contains(PollFlags::POLLIN));
35 }
36
37 // ppoll(2) is the same as poll except for how it handles timeouts and signals.
38 // Repeating the test for poll(2) should be sufficient to check that our
39 // bindings are correct.
40 #[cfg(any(target_os = "android",
41 target_os = "dragonfly",
42 target_os = "freebsd",
43 target_os = "linux"))]
44 #[test]
test_ppoll()45 fn test_ppoll() {
46 use nix::poll::ppoll;
47 use nix::sys::signal::SigSet;
48 use nix::sys::time::{TimeSpec, TimeValLike};
49
50 let timeout = TimeSpec::milliseconds(1);
51 let (r, w) = pipe().unwrap();
52 let mut fds = [PollFd::new(r, PollFlags::POLLIN)];
53
54 // Poll an idle pipe. Should timeout
55 let sigset = SigSet::empty();
56 let nfds = loop_while_eintr!(ppoll(&mut fds, Some(timeout), sigset));
57 assert_eq!(nfds, 0);
58 assert!(!fds[0].revents().unwrap().contains(PollFlags::POLLIN));
59
60 write(w, b".").unwrap();
61
62 // Poll a readable pipe. Should return an event.
63 let nfds = ppoll(&mut fds, Some(timeout), SigSet::empty()).unwrap();
64 assert_eq!(nfds, 1);
65 assert!(fds[0].revents().unwrap().contains(PollFlags::POLLIN));
66 }
67
68 #[test]
test_pollfd_fd()69 fn test_pollfd_fd() {
70 use std::os::unix::io::AsRawFd;
71
72 let pfd = PollFd::new(0x1234, PollFlags::empty());
73 assert_eq!(pfd.as_raw_fd(), 0x1234);
74 }
75
76 #[test]
test_pollfd_events()77 fn test_pollfd_events() {
78 let mut pfd = PollFd::new(-1, PollFlags::POLLIN);
79 assert_eq!(pfd.events(), PollFlags::POLLIN);
80 pfd.set_events(PollFlags::POLLOUT);
81 assert_eq!(pfd.events(), PollFlags::POLLOUT);
82 }
83