pub fn poll(reqs: &mut [PollRequest<'_>], timeout: int) -> Result<int>Expand description
poll wraps the Linux system call of the same name, or at least one
with a similar name, passing all of the given requests to the kernel.
Warning: This abstraction doesn’t really work because the lifetime
bounds on PollRequest make the File objects unusable once the are
used here with a mutable borrow. We’ll hopefully fix this in a future
release.
The kernel will modify the request objects in-place with updated event
flags, which you can then retrieve using PollRequest::response.
The successful return value is the number of entries in reqs that now
have at least one response flag set.
The kernel may have an upper limit on the number of entries in reqs that
is smaller than the maximum value of usize. If the given slice is too
long then this function will return the EINVAL error code.