TargetPtrHolder.h (1495B)
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 #ifndef DOM_QUOTA_TARGETPTRHOLDER_H_ 8 #define DOM_QUOTA_TARGETPTRHOLDER_H_ 9 10 #include "mozilla/RefPtr.h" 11 #include "nsCOMPtr.h" 12 #include "nsProxyRelease.h" 13 #include "nsThreadUtils.h" 14 15 namespace mozilla::dom::quota { 16 17 // TODO: Remove this ad hoc class when bug 1805830 is fixed. 18 template <typename T> 19 class TargetPtrHolder { 20 public: 21 MOZ_IMPLICIT TargetPtrHolder(T* aRawPtr) 22 : mTarget(GetCurrentSerialEventTarget()), mPtr(aRawPtr) { 23 MOZ_ASSERT(mPtr); 24 } 25 26 TargetPtrHolder(const TargetPtrHolder&) = default; 27 28 TargetPtrHolder& operator=(const TargetPtrHolder&) = default; 29 30 TargetPtrHolder(TargetPtrHolder&&) = default; 31 32 TargetPtrHolder& operator=(TargetPtrHolder&&) = default; 33 34 ~TargetPtrHolder() { 35 if (!mPtr) { 36 return; 37 } 38 39 NS_ProxyRelease("TargetPtrHolder::mPtr", mTarget, mPtr.forget()); 40 } 41 42 T* get() const { 43 MOZ_ASSERT(mPtr); 44 45 return mPtr.get(); 46 } 47 48 T* operator->() const MOZ_NO_ADDREF_RELEASE_ON_RETURN { return get(); } 49 50 bool operator!() { return !mPtr.get(); } 51 52 private: 53 nsCOMPtr<nsISerialEventTarget> mTarget; 54 RefPtr<T> mPtr; 55 }; 56 57 } // namespace mozilla::dom::quota 58 59 #endif // DOM_QUOTA_TARGETPTRHOLDER_H_