1 files changed, 57 insertions, 0 deletions
diff --git a/ctr-std/src/sys/wasm/time.rs b/ctr-std/src/sys/wasm/time.rs
new file mode 100644
index 0000000..e52435e
--- /dev/null
+++ b/ctr-std/src/sys/wasm/time.rs
@@ -0,0 +1,57 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use time::Duration;
+use sys::{TimeSysCall, TimeClock};
+
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+pub struct Instant(Duration);
+
+#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
+pub struct SystemTime(Duration);
+
+pub const UNIX_EPOCH: SystemTime = SystemTime(Duration::from_secs(0));
+
+impl Instant {
+    pub fn now() -> Instant {
+        Instant(TimeSysCall::perform(TimeClock::Monotonic))
+    }
+
+    pub fn sub_instant(&self, other: &Instant) -> Duration {
+        self.0 - other.0
+    }
+
+    pub fn add_duration(&self, other: &Duration) -> Instant {
+        Instant(self.0 + *other)
+    }
+
+    pub fn sub_duration(&self, other: &Duration) -> Instant {
+        Instant(self.0 - *other)
+    }
+}
+
+impl SystemTime {
+    pub fn now() -> SystemTime {
+        SystemTime(TimeSysCall::perform(TimeClock::System))
+    }
+
+    pub fn sub_time(&self, other: &SystemTime)
+                    -> Result<Duration, Duration> {
+        self.0.checked_sub(other.0).ok_or_else(|| other.0 - self.0)
+    }
+
+    pub fn add_duration(&self, other: &Duration) -> SystemTime {
+        SystemTime(self.0 + *other)
+    }
+
+    pub fn sub_duration(&self, other: &Duration) -> SystemTime {
+        SystemTime(self.0 - *other)
+    }
+}