move wasi-c2 into wasi-common

crates/wasi-common/cap-std-sync/src/clocks.rs

@@ -0,0 +1,46 @@
+use cap_std::time::{Duration, Instant, SystemTime};
+use cap_time_ext::{MonotonicClockExt, SystemClockExt};
+use wasi_c2::clocks::{WasiClocks, WasiMonotonicClock, WasiSystemClock};
+
+pub struct SystemClock(cap_std::time::SystemClock);
+
+impl SystemClock {
+    pub unsafe fn new() -> Self {
+        SystemClock(cap_std::time::SystemClock::new())
+    }
+}
+impl WasiSystemClock for SystemClock {
+    fn resolution(&self) -> Duration {
+        self.0.resolution()
+    }
+    fn now(&self, precision: Duration) -> SystemTime {
+        self.0.now_with(precision)
+    }
+}
+
+pub struct MonotonicClock(cap_std::time::MonotonicClock);
+impl MonotonicClock {
+    pub unsafe fn new() -> Self {
+        MonotonicClock(cap_std::time::MonotonicClock::new())
+    }
+}
+impl WasiMonotonicClock for MonotonicClock {
+    fn resolution(&self) -> Duration {
+        self.0.resolution()
+    }
+    fn now(&self, precision: Duration) -> Instant {
+        self.0.now_with(precision)
+    }
+}
+
+pub fn clocks() -> WasiClocks {
+    let system = Box::new(unsafe { SystemClock::new() });
+    let monotonic = unsafe { cap_std::time::MonotonicClock::new() };
+    let creation_time = monotonic.now();
+    let monotonic = Box::new(MonotonicClock(monotonic));
+    WasiClocks {
+        system,
+        monotonic,
+        creation_time,
+    }
+}