package org.jacorb.util;
/*
* JacORB - a free Java ORB
*
* Copyright (C) 2012 Gerald Brose / The JacORB Team.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Library General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option) any
* later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more
* details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/**
* Defines a single thread with a queue enabling notification of timer
* expiration. The priniciple is to have a time ordered list of notification
* objects. The thread waits until the next closest expiration time in the
* queue. The thread is interrupted whenever a new entry is queued. Whenever
* awaken, either by interruption or expiration, the thread notifies all expired
* waiters, removing them from the queue. The timer queue entries consist of an
* absolute expiry time, and an action object typically the action will be to
* wake another thread, but it could do something more specialized. The
* specialized action should not be blocking or it may adversely affect the
* performance of the timer queue.
*
* This is a passthru to the SelectorManager instance and should probably
* go away
*
* @author Phil Mesnier {@literal <mesnier_p@ociweb.com>}
*/
public class TimerQueue
{
SelectorManager impl;
public TimerQueue (SelectorManager sm)
{
impl = sm;
}
public void halt ()
{
impl.halt();
}
public void add (TimerQueueAction a)
{
impl.add (a);
}
public void remove (TimerQueueAction a)
{
impl.remove (a);
}
public int depth ()
{
return impl.poolSize(SelectorRequest.Type.TIMER);
}
}