1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 /* Smart pointer which leaks its owning refcounted object by default. */ 8 9 #ifndef LeakRefPtr_h 10 #define LeakRefPtr_h 11 12 #include "mozilla/AlreadyAddRefed.h" 13 14 namespace mozilla { 15 16 /** 17 * Instance of this class behaves like a raw pointer which leaks the 18 * resource it's owning if not explicitly released. 19 */ 20 template<class T> 21 class LeakRefPtr 22 { 23 public: LeakRefPtr(already_AddRefed<T> && aPtr)24 explicit LeakRefPtr(already_AddRefed<T>&& aPtr) 25 : mRawPtr(aPtr.take()) { } 26 27 explicit operator bool() const { return !!mRawPtr; } 28 29 LeakRefPtr<T>& operator=(already_AddRefed<T>&& aPtr) 30 { 31 mRawPtr = aPtr.take(); 32 return *this; 33 } 34 get()35 T* get() const { return mRawPtr; } 36 take()37 already_AddRefed<T> take() 38 { 39 T* rawPtr = mRawPtr; 40 mRawPtr = nullptr; 41 return already_AddRefed<T>(rawPtr); 42 } 43 release()44 void release() { NS_RELEASE(mRawPtr); } 45 46 private: 47 T* MOZ_OWNING_REF mRawPtr; 48 }; 49 50 } // namespace mozilla 51 52 #endif // LeakRefPtr_h 53