Merge #1281

1281: Added clock_gettime, clock_getres, clock_settime, clock_getcpuclockid r=asomers a=xonatius

Picked up #1100 and added `clock_getcpuclockid` call as well. Credits to @kevinwern for the initial version.

https://www.man7.org/linux/man-pages/man2/clock_gettime.2.html
https://www.man7.org/linux/man-pages/man3/clock_getcpuclockid.3.html

Closes #1275 

Co-authored-by: Daniil Bondarev <xonatius@gmail.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/src/sys/time.rs b/src/sys/time.rs
index 973a3526..269b4253 100644
--- a/src/sys/time.rs
+++ b/src/sys/time.rs
@@ -1,4 +1,5 @@
 use std::{cmp, fmt, ops};
+use std::time::Duration;
 use std::convert::From;
 use libc::{c_long, timespec, timeval};
 pub use libc::{time_t, suseconds_t};
@@ -66,6 +67,21 @@ impl From<timespec> for TimeSpec {
     }
 }
 
+impl From<Duration> for TimeSpec {
+    fn from(duration: Duration) -> Self {
+        TimeSpec(timespec {
+            tv_sec: duration.as_secs() as time_t,
+            tv_nsec: duration.subsec_nanos() as c_long
+        })
+    }
+}
+
+impl From<TimeSpec> for Duration {
+    fn from(timespec: TimeSpec) -> Self {
+        Duration::new(timespec.0.tv_sec as u64, timespec.0.tv_nsec as u32)
+    }
+}
+
 impl AsRef<timespec> for TimeSpec {
     fn as_ref(&self) -> &timespec {
         &self.0
@@ -484,6 +500,7 @@ fn div_rem_64(this: i64, other: i64) -> (i64, i64) {
 #[cfg(test)]
 mod test {
     use super::{TimeSpec, TimeVal, TimeValLike};
+    use std::time::Duration;
 
     #[test]
     pub fn test_timespec() {
@@ -495,6 +512,15 @@ mod test {
     }
 
     #[test]
+    pub fn test_timespec_from() {
+        let duration = Duration::new(123, 123_456_789);
+        let timespec = TimeSpec::nanoseconds(123_123_456_789);
+
+        assert_eq!(TimeSpec::from(duration), timespec);
+        assert_eq!(Duration::from(timespec), duration);
+    }
+
+    #[test]
     pub fn test_timespec_neg() {
         let a = TimeSpec::seconds(1) + TimeSpec::nanoseconds(123);
         let b = TimeSpec::seconds(-1) + TimeSpec::nanoseconds(-123);