/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef nsQueryObject_h #define nsQueryObject_h #include "mozilla/Attributes.h" #include "nsCOMPtr.h" #include "mozilla/RefPtr.h" /*****************************************************************************/ template<class T> class MOZ_STACK_CLASS nsQueryObject final : public nsCOMPtr_helper { public: explicit nsQueryObject(T* aRawPtr) : mRawPtr(aRawPtr) { } virtual nsresult NS_FASTCALL operator()(const nsIID& aIID, void** aResult) const { nsresult status = mRawPtr ? mRawPtr->QueryInterface(aIID, aResult) : NS_ERROR_NULL_POINTER; return status; } private: T* MOZ_NON_OWNING_REF mRawPtr; }; template<class T> class MOZ_STACK_CLASS nsQueryObjectWithError final : public nsCOMPtr_helper { public: nsQueryObjectWithError(T* aRawPtr, nsresult* aErrorPtr) : mRawPtr(aRawPtr), mErrorPtr(aErrorPtr) { } virtual nsresult NS_FASTCALL operator()(const nsIID& aIID, void** aResult) const { nsresult status = mRawPtr ? mRawPtr->QueryInterface(aIID, aResult) : NS_ERROR_NULL_POINTER; if (mErrorPtr) { *mErrorPtr = status; } return status; } private: T* MOZ_NON_OWNING_REF mRawPtr; nsresult* mErrorPtr; }; /*****************************************************************************/ /*****************************************************************************/ template<class T> inline nsQueryObject<T> do_QueryObject(T* aRawPtr) { return nsQueryObject<T>(aRawPtr); } template<class T> inline nsQueryObject<T> do_QueryObject(nsCOMPtr<T>& aRawPtr) { return nsQueryObject<T>(aRawPtr); } template<class T> inline nsQueryObject<T> do_QueryObject(RefPtr<T>& aRawPtr) { return nsQueryObject<T>(aRawPtr); } template<class T> inline nsQueryObjectWithError<T> do_QueryObject(T* aRawPtr, nsresult* aErrorPtr) { return nsQueryObjectWithError<T>(aRawPtr, aErrorPtr); } template<class T> inline nsQueryObjectWithError<T> do_QueryObject(nsCOMPtr<T>& aRawPtr, nsresult* aErrorPtr) { return nsQueryObjectWithError<T>(aRawPtr, aErrorPtr); } template<class T> inline nsQueryObjectWithError<T> do_QueryObject(RefPtr<T>& aRawPtr, nsresult* aErrorPtr) { return nsQueryObjectWithError<T>(aRawPtr, aErrorPtr); } /*****************************************************************************/ #endif // !defined(nsQueryObject_h)