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Article View: borland.public.csharpbuilder.language.csharp
Article #579

Re: Object locking using ReaderWriterLock

#579
From: Sunil.P.Thomas
Date: Thu, 12 Aug 2004 13:10
37 lines
2146 bytes
Hi Marc ,
    What will happen  if
             string sess = _loggedUsers[usn];
            &
            _loggedUsers.Remove(usn)  will be called simultaneously (Which
is a part of RemoveUser() method).
    Regards
        Sunil


"Marc Rohloff [TeamB]" <"on request"> wrote in message
news:1ggdzdtzuzi58$.dlg@marcrohloff.40tude.net...
> On Thu, 12 Aug 2004 10:27:59 +0530, Sunil.P.Thomas wrote:
>
> The first thing is this code has at least 3 syntax errors and doesn't
> compile. Please post compilable code as it makes it a lot easier for
> us. Also your code has no namespace directive, it is highly
> recommended that you add one.
>
> > I want to know , is there any pitfalls in the above class  ?
> No. It looks fine to me.
>
> > How we can avoid them ?
> I would have done the following which works without a lock and then
> used a simple critical section instead of a ReaderWriterLock
> (a CS is a lot more efficient than a RWLock)
>
>  public static bool CanContinue(int usn , string  sessionId  )
>  {
>     string sess = _loggedUsers[usn];
>     return (sess != nil) && (sess==sessionId);
>  }
>
>
> --
> Marc Rohloff [TeamB]
> marc rohloff at myrealbox dot com
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Subject: Re: Object locking using ReaderWriterLock
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