1 use super::File;
2 
3 use futures::{Future, Poll};
4 
5 use std::fs::OpenOptions as StdOpenOptions;
6 use std::io;
7 use std::path::Path;
8 
9 /// Future returned by `File::open` and resolves to a `File` instance.
10 #[derive(Debug)]
11 pub struct OpenFuture<P> {
12     options: StdOpenOptions,
13     path: P,
14 }
15 
16 impl<P> OpenFuture<P>
17 where
18     P: AsRef<Path> + Send + 'static,
19 {
new(options: StdOpenOptions, path: P) -> Self20     pub(crate) fn new(options: StdOpenOptions, path: P) -> Self {
21         OpenFuture { options, path }
22     }
23 }
24 
25 impl<P> Future for OpenFuture<P>
26 where
27     P: AsRef<Path> + Send + 'static,
28 {
29     type Item = File;
30     type Error = io::Error;
31 
poll(&mut self) -> Poll<Self::Item, Self::Error>32     fn poll(&mut self) -> Poll<Self::Item, Self::Error> {
33         let std = try_ready!(::blocking_io(|| self.options.open(&self.path)));
34 
35         let file = File::from_std(std);
36         Ok(file.into())
37     }
38 }
39