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: ScopedClearErrno()18 ScopedClearErrno() : old_errno_(errno) { errno = 0; } ~ScopedClearErrno()19 ~ScopedClearErrno() { 20 if (errno == 0) 21 errno = old_errno_; 22 } 23 24 private: 25 const int old_errno_; 26 27 DISALLOW_COPY_AND_ASSIGN(ScopedClearErrno); 28 }; 29 30 } // namespace base 31 32 #endif // BASE_SCOPED_CLEAR_ERRNO_H_ 33