/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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* The Original Code is Mozilla Communicator client code.
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* The Initial Developer of the Original Code is
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* Portions created by the Initial Developer are Copyright (C) 1998
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*
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#ifndef nsPIEventQueueChain_h__
#define nsPIEventQueueChain_h__
#include "nsISupports.h"
// {8f310040-82a7-11d3-95bc-0060083a0bcf}
#define NS_IEVENTQUEUECHAIN_IID \
{ 0x8f310040, 0x82a7, 0x11d3, { 0x95, 0xbc, 0x0, 0x60, 0x8, 0x3a, 0xb, 0xcf } }
{
/**
* Add the given queue as the new youngest member of our chain.
* It will not be addrefed.
* @param aQueue the queue. must not be null.
* @return error indication
*/
/**
* Remove this element from the chain.
* @return NS_OK
*/
NS_IMETHOD Unlink() = 0;
/**
* Fetch (and addref) the youngest member of the chain.
* @param *aQueue the youngest queue. aQueue must not be null.
* @return error indication
*/
/**
* Fetch (and addref) the youngest member of the chain which is
* still accepting events, or at least still contains events in need
* of processing.
* @param *aQueue the youngest such queue. aQueue must not be null.
* *aQueue will be returned null, if no such queue is found.
* @return error indication -- can be NS_OK even if *aQueue is 0
*/
};
#endif /* nsPIEventQueueChain_h___ */