1 /*
2  * Copyright (C) 2009 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 SCOPED_FD_H_included
18 #define SCOPED_FD_H_included
19 
20 #include <unistd.h>
21 
22 // A smart pointer that closes the given fd on going out of scope.
23 // Use this when the fd is incidental to the purpose of your function,
24 // but needs to be cleaned up on exit.
25 class ScopedFd {
26 public:
ScopedFd(int fd)27     explicit ScopedFd(int fd) : fd(fd) {
28     }
29 
~ScopedFd()30     ~ScopedFd() {
31         close(fd);
32     }
33 
get()34     int get() const {
35         return fd;
36     }
37 
38 private:
39     int fd;
40 
41     // Disallow copy and assignment.
42     ScopedFd(const ScopedFd&);
43     void operator=(const ScopedFd&);
44 };
45 
46 #endif  // SCOPED_FD_H_included
47