When the program starts, it checks for the amount of threads the user wants to use to download files with. The threads are then created. When the user chooses a file to download, the threads begin grabbing the file until it's fully downloaded.
The problem is, some threads stall right from the start, & just sit there doing nothing.
The global work variable is Sync-Locked, then quickly released by each instance, & to my eyes, there is nothing wrong.
They are all instances of the same class, & do the exact same thing, so why is it that some run, & others don't?
VB.NET is the programming language. They are looping Background workers.
I would really like to know why some run, & others don't.
btw... they have quick non-blocking sleeps, as well as blocking sleeps to allow others the chance to run (proprietary non-blocking DLL).
So all i'm left to think on is that Microsoft's process queuing has some type of bug going on in there someplace.
Can anyone verify this?
...or is there a way to do multiple looping threads where they're guaranteed to run?
Any help will be awesomely appreciated.
2  1647 
Did you debug the working-method, if this method is called at all?
Can you provide some code?
Is the amount of running (well working) threads always the same or does it differ when you cloae your program and start it again?
-
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
-
-
Process.GetCurrentProcess.PriorityClass = ProcessPriorityClass.Idle
-
-
Try
-
sServer = GetSetting("Program's Name", "Server Settings", "Server").Trim
-
Catch ex As Exception
-
sServer = ""
-
End Try
-
Try
-
iPort = CInt(Val(GetSetting("Program's Name", "Server Settings", "Port").Trim))
-
If iPort = 0 Then
-
iPort = 119
-
End If
-
Catch ex As Exception
-
iPort = 119
-
End Try
-
Try
-
bIsSSL = GetSetting("Program's Name", "Server Settings", "SSL").Trim
-
Catch ex As Exception
-
bIsSSL = False
-
End Try
-
Try
-
UserConnections = CInt(Val(GetSetting("Program's Name", "Server Settings", "Connections").Trim))
-
If UserConnections = 0 Then
-
UserConnections = 2
-
End If
-
Catch ex As Exception
-
UserConnections = 2
-
End Try
-
Try
-
sUsername = _Decrypt(GetSetting("Program's Name", "Server Settings", "UserName").Trim, GenerateSysKey())
-
Catch ex As Exception
-
sUsername = ""
-
End Try
-
Try
-
sPassword = _Decrypt(GetSetting("Program's Name", "Server Settings", "Password").Trim, GenerateSysKey())
-
Catch ex As Exception
-
sPassword = ""
-
End Try
-
If sServer IsNot "" And sServer IsNot Nothing And UserConnections <> 0 Then
-
_BTCount = UserConnections
-
xBGThread = New Thread(AddressOf ThreadBeginThreads)
-
xBGThread.SetApartmentState(ApartmentState.STA)
-
xBGThread.Priority = ThreadPriority.Lowest
-
xBGThread.IsBackground = True
-
xBGThread.Start()
-
bReadyToConnect = True
-
GoTo 1
-
Else
-
If frmSettings.ShowDialog() = DialogResult.OK Then
-
If sServer IsNot "" And sServer IsNot Nothing Then
-
If iPort <> 0 Then
-
bReadyToConnect = True
-
End If
-
End If
-
End If
-
End If
-
If bReadyToConnect = True Then
-
_BTCount = UserConnections
-
xBGThread = New Thread(AddressOf ThreadBeginThreads)
-
xBGThread.SetApartmentState(ApartmentState.STA)
-
xBGThread.Priority = ThreadPriority.Lowest
-
xBGThread.IsBackground = True
-
xBGThread.Start()
-
End If
-
1:
-
Dim EXfileName As String = Nothing
-
Try
-
If Command() Is Nothing Or Command() = "" Then
-
'No Commandline passed in
-
Else
-
'Deal with Commandline params
-
End If
-
Catch ex As Exception
-
MsgBox(ex.Message & vbCrLf & vbCrLf & Command().Trim)
-
End Try
-
End Sub
-
This is an example of the threads being created: -
Public Sub ThreadBeginThreads()
-
Dim _Count As Integer = _BTCount
-
DLThreads.Clear() ' Global list(Of Integer)
-
For i As Integer = 0 To (_Count - 1)
-
DLThreads.Add(0)
-
Select Case i
-
Case 0
-
BG_Work0.RunWorkerAsync()
-
Case 1
-
BG_Work1.RunWorkerAsync()
-
Case 2
-
BG_Work2.RunWorkerAsync()
-
Case 3
-
BG_Work3.RunWorkerAsync()
-
Case 4
-
BG_Work4.RunWorkerAsync()
-
Case 5
-
BG_Work5.RunWorkerAsync()
-
Case 6
-
BG_Work6.RunWorkerAsync()
-
Case 7 ' And so on...
-
BG_Work7.RunWorkerAsync()
-
End Select
-
Next
-
DLThreads.Add(0)
-
End Sub
-
This is an example of the BG_Work0: -
Public WithEvents _Son0 As TheClassThatDoesTheWork 'Declaration in Form1
-
' And so on...
-
-
Private Sub BG_Work0_DoWork(ByVal sender As Object, ByVal e As System.ComponentModel.DoWorkEventArgs) Handles BG_Work0.DoWork
-
_Son0 = New TheClassThatDoesTheWork(0)
-
End Sub
-
This is an example of _Son0 getting fired events from the instance of TheClassThatDoesTheWork(0): -
Private Sub _Son0_WorkerParent_OnTransfer(ByVal ID As Integer, ByVal _SegFileName As String, ByVal _SegPartNumber As Integer, ByVal _MaxSegParts As Integer, ByVal e As _TransferEventArgs) Handles _Son0.WorkerParent_OnTransfer
-
Try
-
' Deal with the event
-
Catch ex As Exception
-
' Deal with Error
-
End Try
-
End Sub
-
This is an example of TheClassThatDoesTheWork(0): -
'Imports required
-
-
Public Class TheClassThatDoesTheWork
-
-
'All the declarations required
-
'All the events
-
-
-
Public Property Terminate_ThreadWorker As Boolean
-
Get
-
Return xTerminateThread
-
End Get
-
Set(ByVal value As Boolean)
-
xTerminateThread = value
-
End Set
-
End Property
-
-
Public Sub New(ByVal xID As Integer)
-
_ID = xID
-
_Worker.Timeout = 30
-
_Worker.NewsServer = sServer
-
_Worker.NewsPort = iPort
-
_Worker.User = sUsername
-
_Worker.Password = sPassword
-
Select Case bIsSSL
-
Case True
-
_Worker.SSLStartMode = sslImplicit
-
Case False
-
_Worker.SSLStartMode = sslNone
-
End Select
-
xThread = New Thread(AddressOf DEngine)
-
xThread.SetApartmentState(ApartmentState.STA)
-
xThread.Priority = ThreadPriority.Lowest
-
xThread.IsBackground = True
-
xThread.Start()
-
End Sub
-
-
Private Sub DEngine()
-
Nap = New TakeNap ' Non-Blocking sleep
-
Do Until _IsClosing = True Or xTerminateThread = True
-
Nap.Sleep(50) ' or Thread.Sleep(50)
-
If SomeVariable > 0 And SomeOtherVariable = False Then
-
Try
-
'Get the file
-
Catch ex As Exception
-
'Report error to user, then...
-
GoTo 1
-
End Try
-
BusyNow = False
-
If CurrentFile = "" Then GoTo 1
-
GC.Collect()
-
ElseIf SomeOtherVariable = True Then
-
Do Until SomeOtherVariable = False
-
Nap.Sleep(50) ' or Thread.Sleep(50)
-
Loop
-
ElseIf SomeVariable < 1 And SomeOtherVariable = True Then
-
' do stuff
-
End If
-
1:
-
If PAUSED_STOPPED = True Then
-
BusyNow = False
-
End If
-
If _Worker.Connected = False Then
-
BusyNow = False
-
-
Try
-
_Worker.Connect()
-
Catch ex As Exception
-
' Fire an event
-
End Try
-
End If
-
Loop
-
End Sub
-
-
'All required Subs, & Functions
-
-
Protected Overrides Sub Finalize()
-
MyBase.Finalize()
-
End Sub
-
End Class
-
This was posted to C# instead of VB.NET, but it's basically the same theory, at least that's what other C-Sharpers have told me.
Sorry for the mistake though.
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