add clocks!

crates/wasi-c2/src/clocks.rs

@@ -0,0 +1,30 @@
+use cap_std::time::{Duration, Instant, MonotonicClock, SystemClock, SystemTime};
+use cap_time_ext::{MonotonicClockExt, SystemClockExt};
+
+pub trait WasiSystemClock {
+    fn resolution(&self) -> Duration;
+    fn now(&self, precision: Duration) -> SystemTime;
+}
+
+impl WasiSystemClock for SystemClock {
+    fn resolution(&self) -> Duration {
+        SystemClockExt::resolution(self)
+    }
+    fn now(&self, precision: Duration) -> SystemTime {
+        self.now_with(precision)
+    }
+}
+
+pub trait WasiMonotonicClock {
+    fn resolution(&self) -> Duration;
+    fn now(&self, precision: Duration) -> Instant;
+}
+
+impl WasiMonotonicClock for MonotonicClock {
+    fn resolution(&self) -> Duration {
+        MonotonicClockExt::resolution(self)
+    }
+    fn now(&self, precision: Duration) -> Instant {
+        self.now_with(precision)
+    }
+}