yusukes@chromium.org | 34da366 | 2013-05-03 08:06:26 +0900 | [diff] [blame] | 1 | // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #ifndef BASE_SCOPED_CLEAR_ERRNO_H_ |
| 6 | #define BASE_SCOPED_CLEAR_ERRNO_H_ |
| 7 | |
| 8 | #include <errno.h> |
| 9 | |
avi | a6a6a68 | 2015-12-27 07:15:14 +0900 | [diff] [blame] | 10 | #include "base/macros.h" |
yusukes@chromium.org | 34da366 | 2013-05-03 08:06:26 +0900 | [diff] [blame] | 11 | |
| 12 | namespace base { |
| 13 | |
| 14 | // Simple scoper that saves the current value of errno, resets it to 0, and on |
| 15 | // destruction puts the old value back. |
| 16 | class ScopedClearErrno { |
| 17 | public: |
| 18 | ScopedClearErrno() : old_errno_(errno) { |
| 19 | errno = 0; |
| 20 | } |
| 21 | ~ScopedClearErrno() { |
| 22 | if (errno == 0) |
| 23 | errno = old_errno_; |
| 24 | } |
| 25 | |
| 26 | private: |
| 27 | const int old_errno_; |
| 28 | |
| 29 | DISALLOW_COPY_AND_ASSIGN(ScopedClearErrno); |
| 30 | }; |
| 31 | |
| 32 | } // namespace base |
| 33 | |
| 34 | #endif // BASE_SCOPED_CLEAR_ERRNO_H_ |