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      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:
     27     explicit ScopedFd(int fd) : fd(fd) {
     28     }
     29 
     30     ~ScopedFd() {
     31         close(fd);
     32     }
     33 
     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