security/sandbox/chromium/base/scoped_clear_errno.h@97036ab72558 (annotated)
security/sandbox/chromium/base/scoped_clear_errno.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| michael@0 | 2 | // Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 3 | // found in the LICENSE file. |
| michael@0 | 4 | |
| michael@0 | 5 | #ifndef BASE_SCOPED_CLEAR_ERRNO_H_ |
| michael@0 | 6 | #define BASE_SCOPED_CLEAR_ERRNO_H_ |
| michael@0 | 7 | |
| michael@0 | 8 | #include <errno.h> |
| michael@0 | 9 | |
| michael@0 | 10 | #include "base/basictypes.h" |
| michael@0 | 11 | |
| michael@0 | 12 | namespace base { |
| michael@0 | 13 | |
| michael@0 | 14 | // Simple scoper that saves the current value of errno, resets it to 0, and on |
| michael@0 | 15 | // destruction puts the old value back. |
| michael@0 | 16 | class ScopedClearErrno { |
| michael@0 | 17 | public: |
| michael@0 | 18 | ScopedClearErrno() : old_errno_(errno) { |
| michael@0 | 19 | errno = 0; |
| michael@0 | 20 | } |
| michael@0 | 21 | ~ScopedClearErrno() { |
| michael@0 | 22 | if (errno == 0) |
| michael@0 | 23 | errno = old_errno_; |
| michael@0 | 24 | } |
| michael@0 | 25 | |
| michael@0 | 26 | private: |
| michael@0 | 27 | const int old_errno_; |
| michael@0 | 28 | |
| michael@0 | 29 | DISALLOW_COPY_AND_ASSIGN(ScopedClearErrno); |
| michael@0 | 30 | }; |
| michael@0 | 31 | |
| michael@0 | 32 | } // namespace base |
| michael@0 | 33 | |
| michael@0 | 34 | #endif // BASE_SCOPED_CLEAR_ERRNO_H_ |
