1 files changed, 23 insertions, 0 deletions
diff --git a/src/main/kotlin/moe/nea/firmament/util/Timer.kt b/src/main/kotlin/moe/nea/firmament/util/Timer.kt
new file mode 100644
index 0000000..bfdc9d1
--- /dev/null
+++ b/src/main/kotlin/moe/nea/firmament/util/Timer.kt
@@ -0,0 +1,23 @@
+package moe.nea.firmament.util
+
+import kotlin.time.Duration
+import kotlin.time.ExperimentalTime
+import kotlin.time.TimeSource
+
+@OptIn(ExperimentalTime::class)
+class Timer {
+    private var mark: TimeSource.Monotonic.ValueTimeMark? = null
+
+    fun timePassed(): Duration {
+        return mark?.elapsedNow() ?: Duration.INFINITE
+    }
+
+    fun markNow() {
+        mark = TimeSource.Monotonic.markNow()
+    }
+
+    fun markFarPast() {
+        mark = null
+    }
+
+}