mirror of
https://github.com/rn10950/RetroZilla.git
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156 lines
9.3 KiB
C
156 lines
9.3 KiB
C
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsAgg_h___
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#define nsAgg_h___
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#include "nsISupports.h"
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////////////////////////////////////////////////////////////////////////////////
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// Put this in your class's declaration:
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#define NS_DECL_AGGREGATED \
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NS_DECL_ISUPPORTS \
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\
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public: \
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\
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/* You must implement this operation instead of the nsISupports */ \
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/* methods if you inherit from nsAggregated. */ \
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NS_IMETHOD \
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AggregatedQueryInterface(const nsIID& aIID, void** aInstancePtr); \
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\
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protected: \
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\
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class Internal : public nsISupports { \
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public: \
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\
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Internal() {} \
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\
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NS_IMETHOD QueryInterface(const nsIID& aIID, \
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void** aInstancePtr); \
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NS_IMETHOD_(nsrefcnt) AddRef(void); \
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NS_IMETHOD_(nsrefcnt) Release(void); \
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\
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}; \
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\
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friend class Internal; \
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\
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nsISupports* fOuter; \
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Internal fAggregated; \
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\
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nsISupports* GetInner(void) { return &fAggregated; } \
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\
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public: \
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// Put this in your class's constructor:
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#define NS_INIT_AGGREGATED(outer) \
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PR_BEGIN_MACRO \
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fOuter = outer ? outer : &fAggregated; \
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PR_END_MACRO
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// Put this in your class's implementation file:
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#define NS_IMPL_AGGREGATED(_class) \
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NS_IMETHODIMP \
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_class::QueryInterface(const nsIID& aIID, void** aInstancePtr) \
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{ \
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return fOuter->QueryInterface(aIID, aInstancePtr); \
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} \
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\
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NS_IMETHODIMP_(nsrefcnt) \
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_class::AddRef(void) \
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{ \
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return fOuter->AddRef(); \
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} \
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\
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NS_IMETHODIMP_(nsrefcnt) \
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_class::Release(void) \
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{ \
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return fOuter->Release(); \
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} \
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\
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NS_IMETHODIMP \
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_class::Internal::QueryInterface(const nsIID& aIID, void** aInstancePtr) \
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{ \
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_class* agg = (_class*)((char*)(this) - offsetof(_class, fAggregated)); \
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return agg->AggregatedQueryInterface(aIID, aInstancePtr); \
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} \
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\
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NS_IMETHODIMP_(nsrefcnt) \
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_class::Internal::AddRef(void) \
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{ \
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_class* agg = (_class*)((char*)(this) - offsetof(_class, fAggregated)); \
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NS_PRECONDITION(PRInt32(agg->mRefCnt) >= 0, "illegal refcnt"); \
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++agg->mRefCnt; \
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NS_LOG_ADDREF(this, agg->mRefCnt, #_class, sizeof(*this)); \
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return agg->mRefCnt; \
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} \
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\
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NS_IMETHODIMP_(nsrefcnt) \
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_class::Internal::Release(void) \
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{ \
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_class* agg = (_class*)((char*)(this) - offsetof(_class, fAggregated)); \
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NS_PRECONDITION(0 != agg->mRefCnt, "dup release"); \
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--agg->mRefCnt; \
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NS_LOG_RELEASE(this, agg->mRefCnt, #_class); \
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if (agg->mRefCnt == 0) { \
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agg->mRefCnt = 1; /* stabilize */ \
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NS_DELETEXPCOM(agg); \
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return 0; \
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} \
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return agg->mRefCnt; \
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} \
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// for use with QI macros in nsISupportsUtils.h:
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#define NS_INTERFACE_MAP_BEGIN_AGGREGATED(_class) \
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NS_IMPL_AGGREGATED_QUERY_HEAD(_class)
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#define NS_IMPL_AGGREGATED_QUERY_HEAD(_class) \
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NS_IMETHODIMP \
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_class::AggregatedQueryInterface(REFNSIID aIID, void** aInstancePtr) \
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{ \
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NS_ASSERTION(aInstancePtr, \
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"AggregatedQueryInterface requires a non-NULL result ptr!"); \
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if ( !aInstancePtr ) \
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return NS_ERROR_NULL_POINTER; \
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nsISupports* foundInterface;
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#endif /* nsAgg_h___ */
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