libtock-sync: alarm: Support empty delays

If libtocksync_alarm_delay_ms() is provided a delay of 0ms we currenty schedule an alarm which is a high overhead for a empty delay. Instead let's just call a yield_no_wait() and return success if we don't actually need to delay. Signed-off-by: Alistair Francis <[email protected]>
tock · Jul 7, 2024 · c2379b0 · c2379b0
1 parent 30f4ee9
commit c2379b0
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/libtock-sync/services/alarm.c b/libtock-sync/services/alarm.c
@@ -17,6 +17,11 @@ int libtocksync_alarm_delay_ms(uint32_t ms) {
   libtock_alarm_t alarm;
   int rc;
 
+  if (ms == 0) {
+    yield_no_wait();
+    return RETURNCODE_SUCCESS;
+  }
+
   if ((rc = libtock_alarm_in_ms(ms, delay_cb, NULL, &alarm)) != RETURNCODE_SUCCESS) {
     return rc;
   }