lock token

platform/util/src/com/intellij/util/concurrency/LockToken.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.util.concurrency;
+
+import com.intellij.openapi.application.AccessToken;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.concurrent.locks.Lock;
+
+/**
+ * Intended to use within try-with-resources.
+ */
+public class LockToken extends AccessToken {
+
+  private final Lock myLock;
+
+  private LockToken(Lock lock) {
+    myLock = lock;
+  }
+
+  @Override
+  public void finish() {
+    myLock.unlock();
+  }
+
+  @NotNull
+  public static LockToken acquireLock(@NotNull Lock lock) {
+    lock.lock();
+    return new LockToken(lock);
+  }
+}