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 // Copyright (c) 2013 The Chromium Authors. All rights reserved.

 // Use of this source code is governed by a BSD-style license that can be

 // found in the LICENSE file.

 #ifndef BASE_SCOPED_CLEAR_ERRNO_H_

 #define BASE_SCOPED_CLEAR_ERRNO_H_

 #include <errno.h>

 #include "base/basictypes.h"

 namespace base {

 // Simple scoper that saves the current value of errno, resets it to 0, and on

 // destruction puts the old value back.

 class ScopedClearErrno {

  public:

   ScopedClearErrno() : old_errno_(errno) {

     errno = 0;

   }

   ~ScopedClearErrno() {

     if (errno == 0)

       errno = old_errno_;

   }

  private:

   const int old_errno_;

   DISALLOW_COPY_AND_ASSIGN(ScopedClearErrno);

 };

 }  // namespace base

 #endif  // BASE_SCOPED_CLEAR_ERRNO_H_