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:
ErrnoRestorer()26   explicit ErrnoRestorer() : saved_errno_(errno) {
27   }
28 
~ErrnoRestorer()29   ~ErrnoRestorer() {
30     errno = saved_errno_;
31   }
32 
override(int new_errno)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