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      1 /*
      2  * Copyright (C) 2013 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef ERRNO_RESTORER_H
     18 #define ERRNO_RESTORER_H
     19 
     20 #include <errno.h>
     21 
     22 #include "bionic_macros.h"
     23 
     24 class ErrnoRestorer {
     25  public:
     26   explicit ErrnoRestorer() : saved_errno_(errno) {
     27   }
     28 
     29   ~ErrnoRestorer() {
     30     errno = saved_errno_;
     31   }
     32 
     33   void override(int new_errno) {
     34     saved_errno_ = new_errno;
     35   }
     36 
     37  private:
     38   int saved_errno_;
     39 
     40   DISALLOW_COPY_AND_ASSIGN(ErrnoRestorer);
     41 };
     42 
     43 #endif // ERRNO_RESTORER_H
     44