1 files changed, 36 insertions, 0 deletions
diff --git a/jimfs/src/main/java/com/google/common/jimfs/GuardedBy.java b/jimfs/src/main/java/com/google/common/jimfs/GuardedBy.java
new file mode 100644
index 0000000..a653736
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+++ b/jimfs/src/main/java/com/google/common/jimfs/GuardedBy.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2017 The Error Prone Authors.
+ *
+ * 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.google.common.jimfs;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.RetentionPolicy.CLASS;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+// TODO(cpovirk): Delete this in favor of the copy in Error Prone once that has a module name.
+/** Indicates that the annotated element should be used only while holding the specified lock. */
+@Target({FIELD, METHOD})
+@Retention(CLASS)
+@interface GuardedBy {
+  /**
+   * The lock that should be held, specified in the format <a
+   * href="http://jcip.net/annotations/doc/net/jcip/annotations/GuardedBy.html">given in Java
+   * Concurrency in Practice</a>.
+   */
+  String value();
+}