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' **********************************************************************
'
' Copyright (c) 2003-2015 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.
'
' **********************************************************************
Imports Demo
Imports System
Imports System.Collections
Imports System.Threading
Public Class WorkQueue
Private Class CallbackEntry
Public cb As AMD_Hello_sayHello
Public delay As Integer
End Class
Public Sub Join()
_thread.Join()
End Sub
Public Sub Start()
_thread = New Thread(New ThreadStart(AddressOf Me.Run))
_thread.Start()
End Sub
Public Sub Run()
SyncLock Me
While Not _done
If _callbacks.Count = 0 Then
Monitor.Wait(Me)
End If
If Not _callbacks.Count = 0 Then
Dim entry As CallbackEntry = _callbacks(0)
Monitor.Wait(Me, entry.delay)
If Not _done Then
_callbacks.RemoveAt(0)
Console.WriteLine("Belated Hello World!")
entry.cb.ice_response()
End If
End If
End While
Dim e As CallbackEntry
For Each e In _callbacks
e.cb.ice_exception(New RequestCanceledException())
Next
End SyncLock
End Sub
Public Sub Add(ByVal cb As AMD_Hello_sayHello, ByVal delay As Integer)
SyncLock Me
If Not _done Then
Dim entry As CallbackEntry = New CallbackEntry
entry.cb = cb
entry.delay = delay
If _callbacks.Count = 0 Then
Monitor.Pulse(Me)
End If
_callbacks.Add(entry)
Else
cb.ice_exception(New RequestCanceledException())
End If
End SyncLock
End Sub
Public Sub destroy()
SyncLock Me
_done = True
Monitor.Pulse(Me)
End SyncLock
End Sub
Private _thread As Thread
Private _done As Boolean
Private _callbacks As ArrayList = New ArrayList
End Class
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