nsIInterfaceRequestorUtils.h
上传用户:goldcmy89
上传日期:2017-12-03
资源大小:2246k
文件大小:3k
源码类别:
PlugIns编程
开发平台:
Visual C++
- /* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
- *
- * ***** 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 the Mozilla browser.
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications, Inc.
- * Portions created by the Initial Developer are Copyright (C) 1999
- * 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 __nsInterfaceRequestorUtils_h
- #define __nsInterfaceRequestorUtils_h
- #include "nsCOMPtr.h"
- // a type-safe shortcut for calling the |GetInterface()| member function
- // T must inherit from nsIInterfaceRequestor, but the cast may be ambiguous.
- template <class T, class DestinationType>
- inline
- nsresult
- CallGetInterface( T* aSource, DestinationType** aDestination )
- {
- NS_PRECONDITION(aSource, "null parameter");
- NS_PRECONDITION(aDestination, "null parameter");
- return aSource->GetInterface(NS_GET_IID(DestinationType),
- NS_REINTERPRET_CAST(void**, aDestination));
- }
- class NS_COM_GLUE nsGetInterface : public nsCOMPtr_helper
- {
- public:
- nsGetInterface( nsISupports* aSource, nsresult* error )
- : mSource(aSource),
- mErrorPtr(error)
- {
- // nothing else to do here
- }
- virtual nsresult NS_FASTCALL operator()( const nsIID&, void** ) const;
- private:
- nsISupports* mSource;
- nsresult* mErrorPtr;
- };
- inline
- const nsGetInterface
- do_GetInterface( nsISupports* aSource, nsresult* error = 0 )
- {
- return nsGetInterface(aSource, error);
- }
- #endif // __nsInterfaceRequestorUtils_h