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 class ErrnoRestorer { 23 public: 24 explicit ErrnoRestorer() : saved_errno_(errno) { 25 } 26 27 ~ErrnoRestorer() { 28 errno = saved_errno_; 29 } 30 31 void override(int new_errno) { 32 saved_errno_ = new_errno; 33 } 34 35 private: 36 int saved_errno_; 37 38 // Disallow copy and assignment. 39 ErrnoRestorer(const ErrnoRestorer&); 40 void operator=(const ErrnoRestorer&); 41 }; 42 43 #endif // ERRNO_RESTORER_H 44
