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/* -*- 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 nsInterfaceRequestorAgg_h__
#define nsInterfaceRequestorAgg_h__
#include "nsError.h"
class nsIEventTarget;
class nsIInterfaceRequestor;
/**
* This function returns an instance of nsIInterfaceRequestor that aggregates
* two nsIInterfaceRequestor instances. Its GetInterface method queries
* aFirst for the requested interface and will query aSecond only if aFirst
* failed to supply the requested interface. Both aFirst and aSecond may
* be null, and will be released on the main thread when the aggregator is
* destroyed.
*/
extern nsresult NS_NewInterfaceRequestorAggregation(
nsIInterfaceRequestor* aFirst, nsIInterfaceRequestor* aSecond,
nsIInterfaceRequestor** aResult);
/**
* Like the previous method, but aFirst and aSecond will be released on the
* provided target thread.
*/
extern nsresult NS_NewInterfaceRequestorAggregation(
nsIInterfaceRequestor* aFirst, nsIInterfaceRequestor* aSecond,
nsIEventTarget* aTarget, nsIInterfaceRequestor** aResult);
#endif // !defined( nsInterfaceRequestorAgg_h__ )