1 /* 2 * Copyright (C) 2014 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 _SCOPE_GUARD_H 18 #define _SCOPE_GUARD_H 19 20 #include "private/bionic_macros.h" 21 22 // TODO: include explicit std::move when it becomes available 23 template<typename F> 24 class ScopeGuard { 25 public: 26 ScopeGuard(F f) : f_(f), active_(true) {} 27 28 ScopeGuard(ScopeGuard&& that) : f_(that.f_), active_(that.active_) { 29 that.active_ = false; 30 } 31 32 ~ScopeGuard() { 33 if (active_) { 34 f_(); 35 } 36 } 37 38 void disable() { 39 active_ = false; 40 } 41 private: 42 F f_; 43 bool active_; 44 45 DISALLOW_IMPLICIT_CONSTRUCTORS(ScopeGuard); 46 }; 47 48 template<typename T> 49 ScopeGuard<T> make_scope_guard(T f) { 50 return ScopeGuard<T>(f); 51 } 52 53 #endif // _SCOPE_GUARD_H 54
