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// **********************************************************************
//
// Copyright (c) 2003-2010 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);
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);
}
}
public void queue(ThreadPoolWorkItem callback)
{
_m.Lock();
try
{
Debug.Assert(!_destroyed);
_queue.AddLast(callback);
_m.Notify();
}
finally
{
_m.Unlock();
}
}
public void destroy()
{
_m.Lock();
try
{
Debug.Assert(!_destroyed);
_destroyed = true;
_m.Notify();
}
finally
{
_m.Unlock();
}
}
public void joinWithThread()
{
if(_thread != null)
{
_thread.Join();
}
}
public void run()
{
LinkedList<ThreadPoolWorkItem> queue = new LinkedList<ThreadPoolWorkItem>();
while(true)
{
_m.Lock();
try
{
if(_destroyed && _queue.Count == 0)
{
break;
}
while(!_destroyed && _queue.Count == 0)
{
_m.Wait();
}
LinkedList<ThreadPoolWorkItem> tmp = queue;
queue = _queue;
_queue = tmp;
}
finally
{
_m.Unlock();
}
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();
}
}
private Instance _instance;
private bool _destroyed;
private LinkedList<ThreadPoolWorkItem> _queue = new LinkedList<ThreadPoolWorkItem>();
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 void Start(ThreadPriority priority)
{
_thread = new Thread(new ThreadStart(Run));
_thread.IsBackground = true;
_thread.Name = _name;
_thread.Priority = priority;
_thread.Start();
}
public void Run()
{
_asyncIOThread.run();
}
private AsyncIOThread _asyncIOThread;
private string _name;
private Thread _thread;
}
private HelperThread _thread;
private readonly IceUtilInternal.Monitor _m = new IceUtilInternal.Monitor();
}
}
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