Use proper error handling instead of lurking panics everywhere

src/utils.rs

@@ -1,6 +1,14 @@
+use nix::errno::Errno;
 use nix::time::{clock_gettime, ClockId};
+use thiserror::Error;
 
-pub(crate) struct Utils {}
+#[derive(Debug, Error)]
+pub enum UtilError {
+    #[error("libc error")]
+    Libc(#[from] Errno),
+}
+
+pub struct Utils {}
 
 impl Utils {
     pub(crate) fn a_else_b(a: f64, b: f64) -> f64 {
@@ -9,9 +17,9 @@ impl Utils {
     pub(crate) fn ewma_factor(tick: f64, dur: f64) -> f64 {
         ((0.5_f64).ln() / (dur / tick)).exp()
     }
-    pub(crate) fn get_current_time() -> (f64, f64) {
-        let time = clock_gettime(ClockId::CLOCK_MONOTONIC).unwrap();
-        (time.tv_sec() as f64, time.tv_nsec() as f64)
+    pub(crate) fn get_current_time() -> Result<(f64, f64), UtilError> {
+        let time = clock_gettime(ClockId::CLOCK_MONOTONIC)?;
+        Ok((time.tv_sec() as f64, time.tv_nsec() as f64))
     }
 
     #[cfg(target_endian = "big")]