Update third_party/lang-items to support OpenSK.

third_party/lang-items/src/util.rs

@@ -0,0 +1,46 @@
+use libtock_drivers::led;
+use libtock_drivers::timer::{self, Duration};
+
+// Signal a panic using the LowLevelDebug capsule (if available).
+pub fn signal_panic() {
+    let _ = libtock_core::syscalls::command1_insecure(8, 1, 1);
+}
+
+// Signal an out-of-memory error using the LowLevelDebug capsule (if available).
+pub fn signal_oom() {
+    let _ = libtock_core::syscalls::command1_insecure(8, 2, 1);
+}
+
+pub fn flash_all_leds() -> ! {
+    // Flash all LEDs (if available). All errors from syscalls are ignored: we are already inside a
+    // panic handler so there is nothing much to do if simple drivers (timer, LEDs) don't work.
+    loop {
+        if let Ok(leds) = led::all() {
+            for led in leds {
+                let _ = led.on();
+            }
+        }
+        let _ = timer::sleep(Duration::from_ms(100));
+        if let Ok(leds) = led::all() {
+            for led in leds {
+                let _ = led.off();
+            }
+        }
+        let _ = timer::sleep(Duration::from_ms(100));
+    }
+}
+
+pub fn cycle_leds() -> ! {
+    // Cycle though all LEDs (if available). All errors from syscalls are ignored: we are already
+    // inside an error handler so there is nothing much to do if simple drivers (timer, LEDs) don't
+    // work.
+    loop {
+        if let Ok(leds) = led::all() {
+            for led in leds {
+                let _ = led.on();
+                let _ = timer::sleep(Duration::from_ms(100));
+                let _ = led.off();
+            }
+        }
+    }
+}