Replace time with std::time

Cargo.toml

@@ -21,6 +21,5 @@ gcc = "^0.3"
 
 [dependencies]
 libc = "^0.2"
-time = "^0.1"
 rand = "^0.3"
 rustc-serialize = "^0.3"

src/fortuna.rs

@@ -46,8 +46,8 @@
 
 use cryptoutil::copy_memory;
 
+use std::time::{Duration, Instant};
 use rand::{Rng, SeedableRng};
-use time::precise_time_s;
 
 use aessafe::AesSafe256Encryptor;
 use cryptoutil::read_u32_le;
@@ -180,7 +180,7 @@ pub struct Fortuna {
     pool: [Pool; NUM_POOLS],
     generator: FortunaGenerator,
     reseed_count: u32,
-    last_reseed_time: f64
+    last_reseed_time: Option<Instant>
 }
 
 impl Fortuna {
@@ -190,7 +190,7 @@ impl Fortuna {
             pool: [Pool::new(); NUM_POOLS],
             generator: FortunaGenerator::new(),
             reseed_count: 0,
-            last_reseed_time: 0.0
+            last_reseed_time: None,
         }
     }
 
@@ -216,11 +216,15 @@ impl Rng for Fortuna {
     /// pool, this function will fail the task.
     fn fill_bytes(&mut self, dest: &mut [u8]) {
         // Reseed if necessary
-        let now = precise_time_s();
         if self.pool[0].count >= MIN_POOL_SIZE &&
-           now - self.last_reseed_time > 0.1 {
+            if let Some(last_reseed_time) = self.last_reseed_time {
+                last_reseed_time.elapsed() > Duration::from_millis(100)
+            } else {
+                true
+            }
+        {
             self.reseed_count += 1;
-            self.last_reseed_time = now;
+            self.last_reseed_time = Some(Instant::now());
             // Compute key as Sha256d( key || s )
             let mut hash = [0; (32 * NUM_POOLS)];
             let mut n_pools = 0;
@@ -259,14 +263,14 @@ impl<'a> SeedableRng<&'a [u8]> for Fortuna {
 
     fn reseed(&mut self, seed: &'a [u8]) {
         self.reseed_count += 1;
-        self.last_reseed_time = precise_time_s();
+        self.last_reseed_time = Some(Instant::now());
         self.generator.reseed(seed);
     }
 }
 
 #[cfg(test)]
 fn test_force_reseed(f: &mut Fortuna) {
-    f.last_reseed_time -= 0.2;
+    f.last_reseed_time = Some(Instant::now() - Duration::from_millis(200));
 }
 
 #[cfg(test)]

src/lib.rs

@@ -8,7 +8,6 @@
 
 extern crate rand;
 extern crate rustc_serialize as serialize;
-extern crate time;
 extern crate libc;
 
 #[cfg(all(test, feature = "with-bench"))]