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 10 namespace base { 11 12 // Simple scoper that saves the current value of errno, resets it to 0, and on 13 // destruction puts the old value back. 14 class ScopedClearErrno { 15 public: ScopedClearErrno()16 ScopedClearErrno() : old_errno_(errno) { errno = 0; } ~ScopedClearErrno()17 ~ScopedClearErrno() { 18 if (errno == 0) 19 errno = old_errno_; 20 } 21 22 private: 23 const int old_errno_; 24 25 ScopedClearErrno(const ScopedClearErrno&) = delete; 26 ScopedClearErrno& operator=(const ScopedClearErrno&) = delete; 27 }; 28 29 } // namespace base 30 31 #endif // BASE_SCOPED_CLEAR_ERRNO_H_ 32