1 /*
2  * Copyright (C) 2016 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 package android.annotation;
17 
18 import static java.lang.annotation.ElementType.CONSTRUCTOR;
19 import static java.lang.annotation.ElementType.METHOD;
20 import static java.lang.annotation.ElementType.PARAMETER;
21 import static java.lang.annotation.ElementType.TYPE;
22 import static java.lang.annotation.RetentionPolicy.SOURCE;
23 
24 import java.lang.annotation.Retention;
25 import java.lang.annotation.Target;
26 
27 /**
28  * Denotes that the annotated method can be called from any thread (e.g. it is
29  * "thread safe".) If the annotated element is a class, then all methods in the
30  * class can be called from any thread.
31  * <p>
32  * The main purpose of this method is to indicate that you believe a method can
33  * be called from any thread; static tools can then check that nothing you call
34  * from within this method or class have more strict threading requirements.
35  * <p>
36  * Example:
37  *
38  * <pre>
39  * <code>
40  *  &#64;AnyThread
41  *  public void deliverResult(D data) { ... }
42  * </code>
43  * </pre>
44  *
45  * @memberDoc This method is safe to call from any thread.
46  * @hide
47  */
48 @Retention(SOURCE)
49 @Target({METHOD,CONSTRUCTOR,TYPE,PARAMETER})
50 public @interface AnyThread {
51 }
52