From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Martijn Muijsers <martijnmuijsers@live.nl>
Date: Sun, 5 Feb 2023 19:11:39 +0100
Subject: [PATCH] CheckableLock utility

License: AGPL-3.0 (https://www.gnu.org/licenses/agpl-3.0.html)
Gale - https://galemc.org

diff --git a/src/main/java/org/galemc/gale/concurrent/CheckableLock.java b/src/main/java/org/galemc/gale/concurrent/CheckableLock.java
new file mode 100644
index 0000000000000000000000000000000000000000..749d8d8e2038554a21c2d879349d5189d86a8481
--- /dev/null
+++ b/src/main/java/org/galemc/gale/concurrent/CheckableLock.java
@@ -0,0 +1,28 @@
+// Gale - CheckableLock utility
+
+package org.galemc.gale.concurrent;
+
+import org.galemc.gale.executor.annotation.YieldFree;
+
+import java.util.concurrent.locks.Lock;
+
+/**
+ * A {@link Lock} that also provides an {@link #isLocked()} method.
+ *
+ * @author Martijn Muijsers under AGPL-3.0
+ */
+public interface CheckableLock extends Lock {
+
+    /**
+     * @return Whether this lock is currently held.
+     */
+    @YieldFree
+    boolean isLocked();
+
+    /**
+     * @return Whether this lock is currently held by the {@link Thread#currentThread}.
+     */
+    @YieldFree
+    boolean isHeldByCurrentThread();
+
+}