1/*
2 * Copyright (C) 2013 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 ERRNO_RESTORER_H
18#define ERRNO_RESTORER_H
19
20#include <errno.h>
21
22class ErrnoRestorer {
23 public:
24  explicit ErrnoRestorer() : saved_errno_(errno) {
25  }
26
27  ~ErrnoRestorer() {
28    errno = saved_errno_;
29  }
30
31  void override(int new_errno) {
32    saved_errno_ = new_errno;
33  }
34
35 private:
36  int saved_errno_;
37
38  // Disallow copy and assignment.
39  ErrnoRestorer(const ErrnoRestorer&);
40  void operator=(const ErrnoRestorer&);
41};
42
43#endif // ERRNO_RESTORER_H
44