gecko/xpcom/base/nsInterfaceRequestorAgg.cpp

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2012-05-21 04:12:37 -07:00
/* 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/. */
#include "nsInterfaceRequestorAgg.h"
#include "nsCOMPtr.h"
#include "mozilla/Attributes.h"
class nsInterfaceRequestorAgg MOZ_FINAL : 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;
}