How to pool on socket ?

**Tom Shelton** · Jul 21 '05, 04:02 PM

Re: How to pool on socket ?

In article <dcaOc.118392$R f.22568@edtnps8 4>, User wrote:[color=blue]
> Hi,
>
> How do I pool my socket to see if there is any message pending?
>
> I don't want to use timers because they are multithreaded and it break
> the linearity of my messages. (incoming message are numbered and it is
> important to keep the order)
>
> Can I add a handler to the socket? So it could react by itself when
> there is pending data? Something like that the winsock (in VB6) was doing.
>
> Thank you.[/color]

The absolute best way to do this would most likely be to use the asnyc
methods of the socket class (BeginXXXX). The socket will then fire a
callback when data is received.

You could also use the Poll method on the socket to determine if there
is data. You can also use Socket.Select along with Receive with the
Peek flag to determine the socket state...

There are a number of ways that you can accomplish what you're asking,
but the Asnyc methods are usually the most efficient.
--
Tom Shelton [MVP]

**User** · Jul 21 '05, 04:02 PM

Re: How to pool on socket ?

Thank you Tom,

I have another question. I haven't use this async socket yet, but I'll
read on it. Right now, I am using a timer control to pool over the
socket.pending to see if there is new data to process. The timer is
running all day long.

Does the async socket, once started, will pool the socket as long as it
is not stopped? I mean, I start it once and will run as the same way I
am using the timer control right now?

Thank you.

Tom Shelton wrote:[color=blue]
> In article <dcaOc.118392$R f.22568@edtnps8 4>, User wrote:
>[color=green]
>>Hi,
>>
>>How do I pool my socket to see if there is any message pending?
>>
>>I don't want to use timers because they are multithreaded and it break
>>the linearity of my messages. (incoming message are numbered and it is
>>important to keep the order)
>>
>>Can I add a handler to the socket? So it could react by itself when
>>there is pending data? Something like that the winsock (in VB6) was doing.
>>
>>Thank you.[/color]
>
>
> The absolute best way to do this would most likely be to use the asnyc
> methods of the socket class (BeginXXXX). The socket will then fire a
> callback when data is received.
>
> You could also use the Poll method on the socket to determine if there
> is data. You can also use Socket.Select along with Receive with the
> Peek flag to determine the socket state...
>
> There are a number of ways that you can accomplish what you're asking,
> but the Asnyc methods are usually the most efficient.[/color]

**Tom Shelton** · Jul 21 '05, 04:03 PM

Re: How to pool on socket ?

On Fri, 30 Jul 2004 12:36:13 GMT, User wrote:
[color=blue]
> Thank you Tom,
>
> I have another question. I haven't use this async socket yet, but I'll
> read on it. Right now, I am using a timer control to pool over the
> socket.pending to see if there is new data to process. The timer is
> running all day long.
>
> Does the async socket, once started, will pool the socket as long as it
> is not stopped? I mean, I start it once and will run as the same way I
> am using the timer control right now?
>
> Thank you.[/color]

Basically, once you begin the async operation, it will continue until the
socket is closed - or the call back is fired. Once it is fired, you need
to call the async method again... So just for a quick psuedo code example:

begin serverfunc
socket.bind
socket.listen
while (running)
manualreseteven t.reset
socket.beginacc ept
manualreseteven t.waitone
wend
end serverfunc

begin acceptfunc
' get socket object
client = get_from_async_ object

' signal server thread to continue
manualreseteven t.set

client.beginrea d
end acceptfunc

begin readfunc
' do read stuff

' send a reply
client.beginsen d
end readfunc

begin sendfunc
if sent client.beginrea d
end sendfunc

etc, etc...

There are some good articles on msdn (this should get you in the correct
location):

http://msdn.microsoft.com/library/de...rverSocket.asp

There is a little more code involved in using the async methods, but they
are the most scalable and efficient.

--
Tom Shelton [MVP]

**User** · Jul 21 '05, 04:05 PM

Re: How to pool on socket ?

That is very interesting Tom, I red the article on MSDN, I got to use it.

Thank you very much.

Tom Shelton wrote:[color=blue]
> On Fri, 30 Jul 2004 12:36:13 GMT, User wrote:
>
>[color=green]
>>Thank you Tom,
>>
>>I have another question. I haven't use this async socket yet, but I'll
>>read on it. Right now, I am using a timer control to pool over the
>>socket.pendin g to see if there is new data to process. The timer is
>>running all day long.
>>
>>Does the async socket, once started, will pool the socket as long as it
>>is not stopped? I mean, I start it once and will run as the same way I
>>am using the timer control right now?
>>
>>Thank you.[/color]
>
>
> Basically, once you begin the async operation, it will continue until the
> socket is closed - or the call back is fired. Once it is fired, you need
> to call the async method again... So just for a quick psuedo code example:
>
> begin serverfunc
> socket.bind
> socket.listen
> while (running)
> manualreseteven t.reset
> socket.beginacc ept
> manualreseteven t.waitone
> wend
> end serverfunc
>
>
> begin acceptfunc
> ' get socket object
> client = get_from_async_ object
>
> ' signal server thread to continue
> manualreseteven t.set
>
> client.beginrea d
> end acceptfunc
>
> begin readfunc
> ' do read stuff
>
> ' send a reply
> client.beginsen d
> end readfunc
>
> begin sendfunc
> if sent client.beginrea d
> end sendfunc
>
> etc, etc...
>
> There are some good articles on msdn (this should get you in the correct
> location):
>
> http://msdn.microsoft.com/library/de...rverSocket.asp
>
> There is a little more code involved in using the async methods, but they
> are the most scalable and efficient.
>[/color]

How to pool on socket ?

How to pool on socket ?

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