gecko-dev/xpcom/base/nsInterfaceRequestorAgg.cpp

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/* ***** 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.
*
* The Initial Developer of the Original Code is IBM Corporation.
* Portions created by IBM Corporation are Copyright (C) 2004
* IBM Corporation. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@meer.net>
*
* Alternatively, the contents of this file may be used under the terms of
* either 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 ***** */
#include "nsInterfaceRequestorAgg.h"
#include "nsCOMPtr.h"
class nsInterfaceRequestorAgg : public nsIInterfaceRequestor
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIINTERFACEREQUESTOR
nsInterfaceRequestorAgg(nsIInterfaceRequestor *aFirst,
nsIInterfaceRequestor *aSecond)
: mFirst(aFirst)
, mSecond(aSecond) {}
nsCOMPtr<nsIInterfaceRequestor> mFirst, mSecond;
};
// XXX This needs to support threadsafe refcounting until we fix bug 243591.
NS_IMPL_THREADSAFE_ISUPPORTS1(nsInterfaceRequestorAgg, nsIInterfaceRequestor)
NS_IMETHODIMP
nsInterfaceRequestorAgg::GetInterface(const nsIID &aIID, void **aResult)
{
nsresult rv = NS_ERROR_NO_INTERFACE;
if (mFirst)
rv = mFirst->GetInterface(aIID, aResult);
if (mSecond && NS_FAILED(rv))
rv = mSecond->GetInterface(aIID, aResult);
return rv;
}
nsresult
NS_NewInterfaceRequestorAggregation(nsIInterfaceRequestor *aFirst,
nsIInterfaceRequestor *aSecond,
nsIInterfaceRequestor **aResult)
{
*aResult = new nsInterfaceRequestorAgg(aFirst, aSecond);
if (!aResult)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(*aResult);
return NS_OK;
}