move wasi-c2 into wasi-common

crates/wasi-common/src/clocks.rs

@@ -0,0 +1,22 @@
+use cap_std::time::{Duration, Instant, SystemTime};
+
+pub enum SystemTimeSpec {
+    SymbolicNow,
+    Absolute(SystemTime),
+}
+
+pub trait WasiSystemClock {
+    fn resolution(&self) -> Duration;
+    fn now(&self, precision: Duration) -> SystemTime;
+}
+
+pub trait WasiMonotonicClock {
+    fn resolution(&self) -> Duration;
+    fn now(&self, precision: Duration) -> Instant;
+}
+
+pub struct WasiClocks {
+    pub system: Box<dyn WasiSystemClock>,
+    pub monotonic: Box<dyn WasiMonotonicClock>,
+    pub creation_time: cap_std::time::Instant,
+}