1/*
2 * Copyright (C) 2011 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_RUNTIME_SIRT_REF_H_
18#define ART_RUNTIME_SIRT_REF_H_
19
20#include "base/logging.h"
21#include "base/macros.h"
22#include "thread.h"
23
24namespace art {
25
26template<class T>
27class SirtRef {
28 public:
29  SirtRef(Thread* self, T* object) : self_(self), sirt_(object) {
30    self_->PushSirt(&sirt_);
31  }
32  ~SirtRef() {
33    CHECK(self_->PopSirt() == &sirt_);
34  }
35
36  T& operator*() const { return *get(); }
37  T* operator->() const { return get(); }
38  T* get() const {
39    return down_cast<T*>(sirt_.GetReference(0));
40  }
41
42  void reset(T* object = NULL) {
43    sirt_.SetReference(0, object);
44  }
45
46 private:
47  Thread* const self_;
48  StackIndirectReferenceTable sirt_;
49
50  DISALLOW_COPY_AND_ASSIGN(SirtRef);
51};
52
53}  // namespace art
54
55#endif  // ART_RUNTIME_SIRT_REF_H_
56