1/*
2 * Copyright (C) 2014 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 ANDROID_BASE_SCOPEGUARD_H
18#define ANDROID_BASE_SCOPEGUARD_H
19
20#include <utility>  // for std::move
21
22namespace android {
23namespace base {
24
25template <typename F>
26class ScopeGuard {
27 public:
28  ScopeGuard(F f) : f_(f), active_(true) {}
29
30  ScopeGuard(ScopeGuard&& that) : f_(std::move(that.f_)), active_(that.active_) {
31    that.active_ = false;
32  }
33
34  ~ScopeGuard() {
35    if (active_) f_();
36  }
37
38  ScopeGuard() = delete;
39  ScopeGuard(const ScopeGuard&) = delete;
40  void operator=(const ScopeGuard&) = delete;
41  void operator=(ScopeGuard&& that) = delete;
42
43  void Disable() { active_ = false; }
44
45  bool active() const { return active_; }
46
47 private:
48  F f_;
49  bool active_;
50};
51
52template <typename T>
53ScopeGuard<T> make_scope_guard(T f) {
54  return ScopeGuard<T>(f);
55}
56
57}  // namespace base
58}  // namespace android
59
60#endif  // ANDROID_BASE_SCOPEGUARD_H
61