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// **********************************************************************
//
// Copyright (c) 2003-2014 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
namespace IceInternal
{
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Net;
using System.Threading;
public class AsyncIOThread
{
internal AsyncIOThread(Instance instance)
{
_instance = instance;
_thread = new HelperThread(this);
updateObserver();
#if !SILVERLIGHT
if(instance.initializationData().properties.getProperty("Ice.ThreadPriority").Length > 0)
{
ThreadPriority priority = IceInternal.Util.stringToThreadPriority(
instance.initializationData().properties.getProperty("Ice.ThreadPriority"));
_thread.Start(priority);
}
else
{
_thread.Start(ThreadPriority.Normal);
}
#else
_thread.Start();
#endif
}
public void
updateObserver()
{
lock(this)
{
Ice.Instrumentation.CommunicatorObserver obsv = _instance.initializationData().observer;
if(obsv != null)
{
_observer = obsv.getThreadObserver("Communicator",
_thread.getName(),
Ice.Instrumentation.ThreadState.ThreadStateIdle,
_observer);
if(_observer != null)
{
_observer.attach();
}
}
}
}
public void queue(ThreadPoolWorkItem callback)
{
lock(this)
{
Debug.Assert(!_destroyed);
_queue.AddLast(callback);
System.Threading.Monitor.Pulse(this);
}
}
public void destroy()
{
lock(this)
{
Debug.Assert(!_destroyed);
_destroyed = true;
System.Threading.Monitor.Pulse(this);
}
}
public void joinWithThread()
{
if(_thread != null)
{
_thread.Join();
}
}
public void run()
{
LinkedList<ThreadPoolWorkItem> queue = new LinkedList<ThreadPoolWorkItem>();
bool inUse = false;
while(true)
{
lock(this)
{
if(_observer != null && inUse)
{
_observer.stateChanged(Ice.Instrumentation.ThreadState.ThreadStateInUseForIO,
Ice.Instrumentation.ThreadState.ThreadStateIdle);
inUse = false;
}
if(_destroyed && _queue.Count == 0)
{
break;
}
while(!_destroyed && _queue.Count == 0)
{
System.Threading.Monitor.Wait(this);
}
LinkedList<ThreadPoolWorkItem> tmp = queue;
queue = _queue;
_queue = tmp;
if(_observer != null)
{
_observer.stateChanged(Ice.Instrumentation.ThreadState.ThreadStateIdle,
Ice.Instrumentation.ThreadState.ThreadStateInUseForIO);
inUse = true;
}
}
foreach(ThreadPoolWorkItem cb in queue)
{
try
{
cb();
}
catch(Ice.LocalException ex)
{
string s = "exception in asynchronous IO thread:\n" + ex;
_instance.initializationData().logger.error(s);
}
catch(System.Exception ex)
{
string s = "unknown exception in asynchronous IO thread:\n" + ex;
_instance.initializationData().logger.error(s);
}
}
queue.Clear();
}
if(_observer != null)
{
_observer.detach();
}
}
private Instance _instance;
private bool _destroyed;
private LinkedList<ThreadPoolWorkItem> _queue = new LinkedList<ThreadPoolWorkItem>();
private Ice.Instrumentation.ThreadObserver _observer;
private sealed class HelperThread
{
internal HelperThread(AsyncIOThread asyncIOThread)
{
_asyncIOThread = asyncIOThread;
_name = _asyncIOThread._instance.initializationData().properties.getProperty("Ice.ProgramName");
if(_name.Length > 0)
{
_name += "-";
}
_name += "Ice.AsyncIOThread";
}
public void Join()
{
_thread.Join();
}
public string getName()
{
return _name;
}
#if !SILVERLIGHT
public void Start(ThreadPriority priority)
#else
public void Start()
#endif
{
_thread = new Thread(new ThreadStart(Run));
_thread.IsBackground = true;
_thread.Name = _name;
#if !SILVERLIGHT
_thread.Priority = priority;
#endif
_thread.Start();
}
public void Run()
{
_asyncIOThread.run();
}
private AsyncIOThread _asyncIOThread;
private string _name;
private Thread _thread;
}
private HelperThread _thread;
}
}
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