1 /* 2 * Copyright (C) 2015 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 UNIQUE_FD_H 18 #define UNIQUE_FD_H 19 20 #include <stdio.h> 21 22 #include <memory> 23 24 class unique_fd { 25 public: 26 unique_fd(int fd) : fd_(fd) { } 27 28 unique_fd(unique_fd&& uf) { 29 fd_ = uf.fd_; 30 uf.fd_ = -1; 31 } 32 33 ~unique_fd() { 34 if (fd_ != -1) { 35 close(fd_); 36 } 37 } 38 39 int get() { 40 return fd_; 41 } 42 43 // Movable. 44 unique_fd& operator=(unique_fd&& uf) { 45 fd_ = uf.fd_; 46 uf.fd_ = -1; 47 return *this; 48 } 49 50 explicit operator bool() const { 51 return fd_ != -1; 52 } 53 54 private: 55 int fd_; 56 57 // Non-copyable. 58 unique_fd(const unique_fd&) = delete; 59 unique_fd& operator=(const unique_fd&) = delete; 60 }; 61 62 #endif // UNIQUE_FD_H 63
