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
26namespace art {
27
28template<typename T>
29class ScopedLocalRef {
30 public:
31  ScopedLocalRef(JNIEnv* env, T localRef) : mEnv(env), mLocalRef(localRef) {
32  }
33
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
47  T release() WARN_UNUSED {
48    T localRef = mLocalRef;
49    mLocalRef = nullptr;
50    return localRef;
51  }
52
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