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 SCOPE_GUARD_H
18#define SCOPE_GUARD_H
19
20// TODO: include explicit std::move when it becomes available
21template<typename F>
22class ScopeGuard {
23 public:
24  ScopeGuard(F f) : f_(f), active_(true) {}
25
26  ScopeGuard(ScopeGuard&& that) : f_(that.f_), active_(that.active_) {
27    that.active_ = false;
28  }
29
30  ~ScopeGuard() {
31    if (active_) {
32      f_();
33    }
34  }
35
36  void disable() {
37    active_ = false;
38  }
39 private:
40  F f_;
41  bool active_;
42
43  ScopeGuard() = delete;
44  ScopeGuard(const ScopeGuard&) = delete;
45  ScopeGuard& operator=(const ScopeGuard&) = delete;
46};
47
48template<typename T>
49ScopeGuard<T> create_scope_guard(T f) {
50  return ScopeGuard<T>(f);
51}
52
53#endif  // SCOPE_GUARD_H
54