Merge #154

154: add Duration.as_cycles r=japaric a=japaric

cc @oni303

Co-authored-by: Jorge Aparicio <jorge@japaric.io>

src/lib.rs

@@ -215,6 +215,14 @@ impl PartialOrd for Instant {
 #[cfg(feature = "timer-queue")]
 pub struct Duration(u32);
 
+#[cfg(feature = "timer-queue")]
+impl Duration {
+    /// Returns the total number of clock cycles contained by this `Duration`
+    pub fn as_cycles(&self) -> u32 {
+        self.0
+    }
+}
+
 #[cfg(feature = "timer-queue")]
 impl ops::AddAssign for Duration {
     fn add_assign(&mut self, dur: Duration) {