summaryrefslogtreecommitdiffstats
path: root/security/sandbox/chromium/base/scoped_clear_errno.h
blob: 585f6f768f1fa92d9d89534fb24082f6ef463c43 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_SCOPED_CLEAR_ERRNO_H_
#define BASE_SCOPED_CLEAR_ERRNO_H_

#include <errno.h>

#include "base/macros.h"

namespace base {

// Simple scoper that saves the current value of errno, resets it to 0, and on
// destruction puts the old value back.
class ScopedClearErrno {
 public:
  ScopedClearErrno() : old_errno_(errno) {
    errno = 0;
  }
  ~ScopedClearErrno() {
    if (errno == 0)
      errno = old_errno_;
  }

 private:
  const int old_errno_;

  DISALLOW_COPY_AND_ASSIGN(ScopedClearErrno);
};

}  // namespace base

#endif  // BASE_SCOPED_CLEAR_ERRNO_H_