Merge pull request Smithay#38 from ids1024/as-fd

Implement `AsFd` for `Socket`

Cargo.toml

@@ -11,6 +11,7 @@ keywords = ["udev", "hardware", "bindings", "sysfs"]
 readme = "README.md"
 
 [dependencies]
+io-lifetimes = "1.0.3"
 libudev-sys = "0.1.4"
 libc = "0.2"
 mio06 = { package = "mio", version = "^0.6.21", optional = true }

src/lib.rs

@@ -4,6 +4,7 @@
 
 #![warn(missing_docs)]
 
+extern crate io_lifetimes;
 extern crate libc;
 pub extern crate libudev_sys as ffi;
 #[cfg(feature = "mio06")]

src/monitor.rs

@@ -6,6 +6,7 @@ use std::io::Result;
 use std::ops::Deref;
 use std::os::unix::io::{AsRawFd, RawFd};
 
+use io_lifetimes::{AsFd, BorrowedFd};
 #[cfg(feature = "mio06")]
 use mio06::{event::Evented, unix::EventedFd, Poll, PollOpt, Ready, Token};
 #[cfg(feature = "mio07")]
@@ -161,6 +162,14 @@ impl AsRawFd for Socket {
     }
 }
 
+/// Provides raw access to the monitor's socket.
+impl AsFd for Socket {
+    /// Returns the file descriptor of the monitor's socket.
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        unsafe { BorrowedFd::borrow_raw(self.as_raw_fd()) }
+    }
+}
+
 pub struct SocketIter {
     udev: Udev,
     monitor: *mut ffi::udev_monitor,