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 #include "base/macros.h" 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_ 35
