1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/sandbox/chromium/base/scoped_clear_errno.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,34 @@
1.4 +// Copyright (c) 2013 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#ifndef BASE_SCOPED_CLEAR_ERRNO_H_
1.9 +#define BASE_SCOPED_CLEAR_ERRNO_H_
1.10 +
1.11 +#include <errno.h>
1.12 +
1.13 +#include "base/basictypes.h"
1.14 +
1.15 +namespace base {
1.16 +
1.17 +// Simple scoper that saves the current value of errno, resets it to 0, and on
1.18 +// destruction puts the old value back.
1.19 +class ScopedClearErrno {
1.20 + public:
1.21 + ScopedClearErrno() : old_errno_(errno) {
1.22 + errno = 0;
1.23 + }
1.24 + ~ScopedClearErrno() {
1.25 + if (errno == 0)
1.26 + errno = old_errno_;
1.27 + }
1.28 +
1.29 + private:
1.30 + const int old_errno_;
1.31 +
1.32 + DISALLOW_COPY_AND_ASSIGN(ScopedClearErrno);
1.33 +};
1.34 +
1.35 +} // namespace base
1.36 +
1.37 +#endif // BASE_SCOPED_CLEAR_ERRNO_H_
