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Diffstat (limited to 'src/libs/xpcom18a4/xpcom/base/nsAgg.h')
| -rw-r--r-- | src/libs/xpcom18a4/xpcom/base/nsAgg.h | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/base/nsAgg.h b/src/libs/xpcom18a4/xpcom/base/nsAgg.h new file mode 100644 index 00000000..c818639e --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/base/nsAgg.h @@ -0,0 +1,155 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* ***** BEGIN LICENSE BLOCK ***** + * Version: MPL 1.1/GPL 2.0/LGPL 2.1 + * + * The contents of this file are subject to the Mozilla Public License Version + * 1.1 (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the License is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License + * for the specific language governing rights and limitations under the + * License. + * + * The Original Code is mozilla.org code. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either of the GNU General Public License Version 2 or later (the "GPL"), + * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * ***** END LICENSE BLOCK ***** */ + +#ifndef nsAgg_h___ +#define nsAgg_h___ + +#include "nsISupports.h" + + +//////////////////////////////////////////////////////////////////////////////// + +// Put this in your class's declaration: +#define NS_DECL_AGGREGATED \ + NS_DECL_ISUPPORTS \ + \ +public: \ + \ + /* You must implement this operation instead of the nsISupports */ \ + /* methods if you inherit from nsAggregated. */ \ + NS_IMETHOD \ + AggregatedQueryInterface(const nsIID& aIID, void** aInstancePtr); \ + \ +protected: \ + \ + class Internal : public nsISupports { \ + public: \ + \ + Internal() {} \ + \ + NS_IMETHOD QueryInterface(const nsIID& aIID, \ + void** aInstancePtr); \ + NS_IMETHOD_(nsrefcnt) AddRef(void); \ + NS_IMETHOD_(nsrefcnt) Release(void); \ + \ + }; \ + \ + friend class Internal; \ + \ + nsISupports* fOuter; \ + Internal fAggregated; \ + \ + nsISupports* GetInner(void) { return &fAggregated; } \ + \ +public: \ + + +// Put this in your class's constructor: +#define NS_INIT_AGGREGATED(outer) \ + PR_BEGIN_MACRO \ + fOuter = outer ? outer : &fAggregated; \ + PR_END_MACRO + + +// Put this in your class's implementation file: +#define NS_IMPL_AGGREGATED(_class) \ +NS_IMETHODIMP \ +_class::QueryInterface(const nsIID& aIID, void** aInstancePtr) \ +{ \ + return fOuter->QueryInterface(aIID, aInstancePtr); \ +} \ + \ +NS_IMETHODIMP_(nsrefcnt) \ +_class::AddRef(void) \ +{ \ + return fOuter->AddRef(); \ +} \ + \ +NS_IMETHODIMP_(nsrefcnt) \ +_class::Release(void) \ +{ \ + return fOuter->Release(); \ +} \ + \ +NS_IMETHODIMP \ +_class::Internal::QueryInterface(const nsIID& aIID, void** aInstancePtr) \ +{ \ + _class* agg = (_class*)((char*)(this) - offsetof(_class, fAggregated)); \ + return agg->AggregatedQueryInterface(aIID, aInstancePtr); \ +} \ + \ +NS_IMETHODIMP_(nsrefcnt) \ +_class::Internal::AddRef(void) \ +{ \ + _class* agg = (_class*)((char*)(this) - offsetof(_class, fAggregated)); \ + NS_PRECONDITION(PRInt32(agg->mRefCnt) >= 0, "illegal refcnt"); \ + ++agg->mRefCnt; \ + NS_LOG_ADDREF(this, agg->mRefCnt, #_class, sizeof(*this)); \ + return agg->mRefCnt; \ +} \ + \ +NS_IMETHODIMP_(nsrefcnt) \ +_class::Internal::Release(void) \ +{ \ + _class* agg = (_class*)((char*)(this) - offsetof(_class, fAggregated)); \ + NS_PRECONDITION(0 != agg->mRefCnt, "dup release"); \ + --agg->mRefCnt; \ + NS_LOG_RELEASE(this, agg->mRefCnt, #_class); \ + if (agg->mRefCnt == 0) { \ + agg->mRefCnt = 1; /* stabilize */ \ + NS_DELETEXPCOM(agg); \ + return 0; \ + } \ + return agg->mRefCnt; \ +} \ + +// for use with QI macros in nsISupportsUtils.h: + +#define NS_INTERFACE_MAP_BEGIN_AGGREGATED(_class) \ + NS_IMPL_AGGREGATED_QUERY_HEAD(_class) + +#define NS_IMPL_AGGREGATED_QUERY_HEAD(_class) \ +NS_IMETHODIMP \ +_class::AggregatedQueryInterface(REFNSIID aIID, void** aInstancePtr) \ +{ \ + NS_ASSERTION(aInstancePtr, \ + "AggregatedQueryInterface requires a non-NULL result ptr!"); \ + if ( !aInstancePtr ) \ + return NS_ERROR_NULL_POINTER; \ + nsISupports* foundInterface; + +#endif /* nsAgg_h___ */ |