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1 /*
2  * Copyright (C) 2010 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 
17 #ifndef ART_TEST_TI_AGENT_SCOPED_LOCAL_REF_H_
18 #define ART_TEST_TI_AGENT_SCOPED_LOCAL_REF_H_
19 
20 #include "jni.h"
21 
22 #include <stddef.h>
23 
24 #include "android-base/macros.h"
25 
26 namespace art {
27 
28 template<typename T>
29 class ScopedLocalRef {
30  public:
ScopedLocalRef(JNIEnv * env,T localRef)31   ScopedLocalRef(JNIEnv* env, T localRef) : mEnv(env), mLocalRef(localRef) {
32   }
33 
~ScopedLocalRef()34   ~ScopedLocalRef() {
35     reset();
36   }
37 
38   void reset(T ptr = nullptr) {
39     if (ptr != mLocalRef) {
40       if (mLocalRef != nullptr) {
41         mEnv->DeleteLocalRef(mLocalRef);
42       }
43       mLocalRef = ptr;
44     }
45   }
46 
release()47   T release() WARN_UNUSED {
48     T localRef = mLocalRef;
49     mLocalRef = nullptr;
50     return localRef;
51   }
52 
get()53   T get() const {
54     return mLocalRef;
55   }
56 
57  private:
58   JNIEnv* const mEnv;
59   T mLocalRef;
60 
61   DISALLOW_COPY_AND_ASSIGN(ScopedLocalRef);
62 };
63 
64 }  // namespace art
65 
66 #endif  // ART_TEST_TI_AGENT_SCOPED_LOCAL_REF_H_
67