1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef nsInterfaceRequestorAgg_h__ 8 #define nsInterfaceRequestorAgg_h__ 9 10 #include "nsError.h" 11 12 class nsIEventTarget; 13 class nsIInterfaceRequestor; 14 15 /** 16 * This function returns an instance of nsIInterfaceRequestor that aggregates 17 * two nsIInterfaceRequestor instances. Its GetInterface method queries 18 * aFirst for the requested interface and will query aSecond only if aFirst 19 * failed to supply the requested interface. Both aFirst and aSecond may 20 * be null, and will be released on the main thread when the aggregator is 21 * destroyed. 22 */ 23 extern nsresult NS_NewInterfaceRequestorAggregation( 24 nsIInterfaceRequestor* aFirst, nsIInterfaceRequestor* aSecond, 25 nsIInterfaceRequestor** aResult); 26 27 /** 28 * Like the previous method, but aFirst and aSecond will be released on the 29 * provided target thread. 30 */ 31 extern nsresult NS_NewInterfaceRequestorAggregation( 32 nsIInterfaceRequestor* aFirst, nsIInterfaceRequestor* aSecond, 33 nsIEventTarget* aTarget, nsIInterfaceRequestor** aResult); 34 35 #endif // !defined( nsInterfaceRequestorAgg_h__ ) 36