Thread question

[fiefie.niles@gmail.com]

I am using a thread. Inside the thread there is a sub ThreadMain. I am
calling the thread from the main program MainForm.
Inside the thread, if I am calling a sub (say doProcess) from the
MainForm, does it mean that doProcess is processed inside or outside
the thread ?

Code from MainForm:
Public Class MainForm
Private Session As ClientSession = Nothing
Private WorkerThread As Threading.Threa d = Nothing

Public Sub ConnectMenu_Cli ck
:
' Create a new instance of the ClientSession object and a
worker
' thread that will handle the socket I/O
Session = New ClientSession
WorkerThread = New Threading.Threa d(AddressOf
Session.ThreadM ain)

Session.ClientF orm = Me

' Initialize the worker thread and start its execution
WorkerThread.Na me = "WorkerThre ad"
WorkerThread.St art()

Code from the thread:
Public Class ClientSession
Public ClientForm As MainForm = Nothing

Public Sub ThreadMain()
:
ClientForm.doPr ocess(strBuffer ) --->will this be executed inside or
outside the thread ?????
:

Thanks.

[Robin Mark Tucker]

Re: Thread question

If you call a method from a thread, that process is executed on that thread,
same for your process. So in your example, the thread will execute the
method on the form, from within the thread - not a good idea.

What you can do is to marshal the call onto the form thread, by using the
Invoke, or BeginInvoke function. Here is a simple page I found that
explains the basics:

http://abstractvb.com/code.asp?A=1027

<fiefie.niles@g mail.com> wrote in message
news:1149261322 .510095.76070@g 10g2000cwb.goog legroups.com...[color=blue]
>I am using a thread. Inside the thread there is a sub ThreadMain. I am
> calling the thread from the main program MainForm.
> Inside the thread, if I am calling a sub (say doProcess) from the
> MainForm, does it mean that doProcess is processed inside or outside
> the thread ?
>
> Code from MainForm:
> Public Class MainForm
> Private Session As ClientSession = Nothing
> Private WorkerThread As Threading.Threa d = Nothing
>
> Public Sub ConnectMenu_Cli ck
> :
> ' Create a new instance of the ClientSession object and a
> worker
> ' thread that will handle the socket I/O
> Session = New ClientSession
> WorkerThread = New Threading.Threa d(AddressOf
> Session.ThreadM ain)
>
> Session.ClientF orm = Me
>
> ' Initialize the worker thread and start its execution
> WorkerThread.Na me = "WorkerThre ad"
> WorkerThread.St art()
>
> Code from the thread:
> Public Class ClientSession
> Public ClientForm As MainForm = Nothing
>
> Public Sub ThreadMain()
> :
> ClientForm.doPr ocess(strBuffer ) --->will this be executed inside or
> outside the thread ?????
> :
>
> Thanks.
>[/color]

[fniles]

Re: Thread question

Thanks.
Isn't Invoke only for changing a control in the form thread ?
Inside ClientForm.doPr ocess, I do call Invoke when changing a textbox value
from the form thread.
Do I also have to call doProcess using the invoke method ?

Thanks.

"Robin Mark Tucker" <robintuckerhom e@removehotmail .comremove> wrote in
message news:e5pojp$djj $1$8302bc10@new s.demon.co.uk.. .[color=blue]
> If you call a method from a thread, that process is executed on that
> thread, same for your process. So in your example, the thread will
> execute the method on the form, from within the thread - not a good idea.
>
> What you can do is to marshal the call onto the form thread, by using the
> Invoke, or BeginInvoke function. Here is a simple page I found that
> explains the basics:
>
> http://abstractvb.com/code.asp?A=1027
>
>
>
>
> <fiefie.niles@g mail.com> wrote in message
> news:1149261322 .510095.76070@g 10g2000cwb.goog legroups.com...[color=green]
>>I am using a thread. Inside the thread there is a sub ThreadMain. I am
>> calling the thread from the main program MainForm.
>> Inside the thread, if I am calling a sub (say doProcess) from the
>> MainForm, does it mean that doProcess is processed inside or outside
>> the thread ?
>>
>> Code from MainForm:
>> Public Class MainForm
>> Private Session As ClientSession = Nothing
>> Private WorkerThread As Threading.Threa d = Nothing
>>
>> Public Sub ConnectMenu_Cli ck
>> :
>> ' Create a new instance of the ClientSession object and a
>> worker
>> ' thread that will handle the socket I/O
>> Session = New ClientSession
>> WorkerThread = New Threading.Threa d(AddressOf
>> Session.ThreadM ain)
>>
>> Session.ClientF orm = Me
>>
>> ' Initialize the worker thread and start its execution
>> WorkerThread.Na me = "WorkerThre ad"
>> WorkerThread.St art()
>>
>> Code from the thread:
>> Public Class ClientSession
>> Public ClientForm As MainForm = Nothing
>>
>> Public Sub ThreadMain()
>> :
>> ClientForm.doPr ocess(strBuffer ) --->will this be executed inside or
>> outside the thread ?????
>> :
>>
>> Thanks.
>>[/color]
>
>[/color]

[fniles]

Re: Thread question

The following code is what I do. Pls let me know if it looks ok to you.
If I do like the following, will sub PQ be executed on the MainForm or the
Class GT Thread ?
Thank you.

Public Class MainForm
Private GSession As GT = Nothing
Private GWorkerThread As Threading.Threa d = Nothing

Public Sub ConnectMenu_Cli ck
:
' Create a new instance of the ClientSession object and a worker
' thread that will handle the socket I/O
GSession = New GSession
GWorkerThread = New Threading.Threa d(AddressOf GSession.Thread Main)


GSession.Client Form = Me
GSession.cb = AddressOf ProcessQuote

' Initialize the worker thread and start its execution
GWorkerThread.N ame = "WorkerThre ad"
GWorkerThread.S tart()
:
end sub

Sub PQ(ByVal Packet As String, ByVal sCaller As String)

Inside the Class Thread:
Public Class GT
Public ClientForm As MainForm = Nothing
Public Delegate Sub PQCallBack(ByVa l Packet As String, ByVal sCaller As
String)
Public cb As PQCallBack

Public Sub ThreadMain()
Dim d As PQCallBack

d = cb
d(strBuffer, "CMC")

"Robin Mark Tucker" <robintuckerhom e@removehotmail .comremove> wrote in
message news:e5pojp$djj $1$8302bc10@new s.demon.co.uk.. .[color=blue]
> If you call a method from a thread, that process is executed on that
> thread, same for your process. So in your example, the thread will
> execute the method on the form, from within the thread - not a good idea.
>
> What you can do is to marshal the call onto the form thread, by using the
> Invoke, or BeginInvoke function. Here is a simple page I found that
> explains the basics:
>
> http://abstractvb.com/code.asp?A=1027
>
>
>
>
> <fiefie.niles@g mail.com> wrote in message
> news:1149261322 .510095.76070@g 10g2000cwb.goog legroups.com...[color=green]
>>I am using a thread. Inside the thread there is a sub ThreadMain. I am
>> calling the thread from the main program MainForm.
>> Inside the thread, if I am calling a sub (say doProcess) from the
>> MainForm, does it mean that doProcess is processed inside or outside
>> the thread ?
>>
>> Code from MainForm:
>> Public Class MainForm
>> Private Session As ClientSession = Nothing
>> Private WorkerThread As Threading.Threa d = Nothing
>>
>> Public Sub ConnectMenu_Cli ck
>> :
>> ' Create a new instance of the ClientSession object and a
>> worker
>> ' thread that will handle the socket I/O
>> Session = New ClientSession
>> WorkerThread = New Threading.Threa d(AddressOf
>> Session.ThreadM ain)
>>
>> Session.ClientF orm = Me
>>
>> ' Initialize the worker thread and start its execution
>> WorkerThread.Na me = "WorkerThre ad"
>> WorkerThread.St art()
>>
>> Code from the thread:
>> Public Class ClientSession
>> Public ClientForm As MainForm = Nothing
>>
>> Public Sub ThreadMain()
>> :
>> ClientForm.doPr ocess(strBuffer ) --->will this be executed inside or
>> outside the thread ?????
>> :
>>
>> Thanks.
>>[/color]
>
>[/color]