Re: Socket Send and Receive Thread Safety

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From: Ivar (ivx_at_lumisoft.ee)
Date: 02/22/05 

Date: Tue, 22 Feb 2005 12:17:42 +0200

> Is this okay or not?
Yes, then no problem.

"Nizar" <Nizar@discussions.microsoft.com> wrote in message
news:FB1871A0-F98A-43C7-99D9-613566AC8CCC@microsoft.com...
> I'm not concerned about simultaneous sends or receives. Let me see if I
> can
> explain it better:
>
> Is it okay to be sending data over a Socket at the same time as data is
> being received on it? For example, have one thread that only sends data
> and
> another thread that only reads data without synchronizing access to the
> shared Socket. So, one thread calls Socket.Receive at the same time as
> another thread calls Socket.Send. Is this okay or not?
>
> "Ivar" wrote:
>
>>
>> Hi,
>>
>> Just think about it:
>> You can do it, it's not leagal but how you gurantee that data is sent to
>> socket in right order ?
>>
>> For example:
>>
>> you need to send:
>> aaaaaa
>> bbbbb
>>
>> You call aaaaaa from 1 thread and bbbbbb on another:
>> what may happen:
>> aaaaaa
>> bbbbb
>> ----- all as you excpect
>>
>> bbbbb
>> aaaaa
>> This may happen if bbbbb thread finishes first.
>>
>> For recieve, you never can be sure what is recieved by one thread and
>> another.
>> may happen following situation:
>> aaaaabbb
>> bbbb
>>
>>
>> "Nizar" <Nizar@discussions.microsoft.com> wrote in message
>> news:E365972C-6186-4705-A734-E285B073FE30@microsoft.com...
>> > Is it safe for one thread to call Socket.Receive and another to call
>> > Socket.Send on the same Socket at the same time?
>> >
>> > The documentation says that instance members are not guaranteed to be
>> > thread
>> > safe, but I'm not sure whether this combination is or not.
>> >
>> > I've also heard that the send and receive buffers are disparate and can
>> > be
>> > accessed simultaneously.
>>
>>
>>

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