port timer patch

patches/libtock-rs/03-timer.patch

 diff --git a/src/timer.rs b/src/timer.rs
-index ae60b07..2e7d544 100644
+index 946c6e5..90d44c9 100644
 --- a/src/timer.rs
 +++ b/src/timer.rs
-@@ -178,7 +178,7 @@ impl<'a> Timer<'a> {
+@@ -136,7 +136,7 @@ impl<'a> Timer<'a> {
      }
  }
-
+ 
 -#[derive(Copy, Clone, Debug)]
 +#[derive(Copy, Clone, Debug, PartialEq)]
  pub struct ClockFrequency {
      hz: usize,
  }
-@@ -196,21 +196,53 @@ pub struct ClockValue {
+@@ -154,21 +154,53 @@ pub struct ClockValue {
  }
-
+ 
  impl ClockValue {
 +    pub const fn new(num_ticks: isize, clock_hz: usize) -> ClockValue {
 +        ClockValue {
@@ -22,10 +22,10 @@ index ae60b07..2e7d544 100644
 +        }
 +    }
 +
-     pub fn num_ticks(&self) -> isize {
+     pub fn num_ticks(self) -> isize {
          self.num_ticks
      }
-
+ 
 +    // Computes (value * factor) / divisor, even when value * factor >= isize::MAX.
 +    fn scale_int(value: isize, factor: isize, divisor: isize) -> isize {
 +        // As long as isize is not i64, this should be fine. If not, this is an alternative:
@@ -33,7 +33,7 @@ index ae60b07..2e7d544 100644
 +        ((value as i64 * factor as i64) / divisor as i64) as isize
 +    }
 +
-     pub fn ms(&self) -> isize {
+     pub fn ms(self) -> isize {
 -        if self.num_ticks.abs() < isize::MAX / 1000 {
 -            (1000 * self.num_ticks) / self.clock_frequency.hz() as isize
 -        } else {
@@ -41,8 +41,8 @@ index ae60b07..2e7d544 100644
 -        }
 +        ClockValue::scale_int(self.num_ticks, 1000, self.clock_frequency.hz() as isize)
      }
-
-     pub fn ms_f64(&self) -> f64 {
+ 
+     pub fn ms_f64(self) -> f64 {
          1000.0 * (self.num_ticks as f64) / (self.clock_frequency.hz() as f64)
      }
 +
@@ -68,5 +68,5 @@ index ae60b07..2e7d544 100644
 +        }
 +    }
  }
-
+ 
  pub struct Alarm {