gecko-dev/xpcom/threads/nsEventQueueUtils.h

/* ***** 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
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Darin Fisher <darin@netscape.com>
 *
 * 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
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#ifndef nsEventQueueUtils_h__
#define nsEventQueueUtils_h__

#include "nsIEventQueueService.h"
#include "nsIServiceManager.h"
#include "nsCOMPtr.h"

inline nsresult
NS_GetEventQueueService(nsIEventQueueService **result)
{
  static NS_DEFINE_CID(kEventQueueServiceCID, NS_EVENTQUEUESERVICE_CID);
  return CallGetService(kEventQueueServiceCID, result);
}

inline nsresult
NS_GetCurrentEventQ(nsIEventQueue **result,
                    nsIEventQueueService *serv = nsnull)
{
  nsCOMPtr<nsIEventQueueService> eqs;
  if (!serv) {
    nsresult rv = NS_GetEventQueueService(getter_AddRefs(eqs));
    if (NS_FAILED(rv)) return rv;
    serv = eqs;
  }
  return serv->GetThreadEventQueue(NS_CURRENT_THREAD, result);
}

inline nsresult
NS_GetMainEventQ(nsIEventQueue **result,
                 nsIEventQueueService *serv = nsnull)
{
  nsCOMPtr<nsIEventQueueService> eqs;
  if (!serv) {
    nsresult rv = NS_GetEventQueueService(getter_AddRefs(eqs));
    if (NS_FAILED(rv)) return rv;
    serv = eqs;
  }
  return serv->GetThreadEventQueue(NS_UI_THREAD, result);
}

#endif // !nsEventQueueUtils_h__