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Re: Thread Safety of "this" pointer

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From	Sergei Organov <osv@javad.com>
Newsgroups	comp.programming.threads
Subject	Re: Thread Safety of "this" pointer
Date	Mon, 05 Sep 2011 21:46:38 +0400
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ittium <ittium@gmail.com> writes:

> Group,
> There is a base class B and Two derived class D1 and D2. b is
> **shared** base class pointer. While d1 and d2 are derived class
> pointer
>
> thread 1
> --------
> *b=d1;
> b->execute();
>
> thread 2
> --------
> *b=d2;
>
> Should I protect (using mutex) the above code. Since this pointer will
> change during the processing
> thanks
> Ittium

Yes, you should implement protection to the above code, but no, 'this'
pointer won't be changed during processing. It's contents of the
variable to which 'b' points that will be changed, and it's that
contents you need to protect (using mutex).

-- Sergei.

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Thread

Thread Safety of "this" pointer ittium <ittium@gmail.com> - 2011-09-04 22:52 +0530
  Re: Thread Safety of "this" pointer David Schwartz <davids@webmaster.com> - 2011-09-04 15:31 -0700
    Re: Thread Safety of "this" pointer itt ium <ittium@gmail.com> - 2011-09-05 01:43 -0700
      Re: Thread Safety of "this" pointer ycwang <wangyongcong@gmail.com> - 2011-09-05 03:21 -0700
  Re: Thread Safety of "this" pointer Sergei Organov <osv@javad.com> - 2011-09-05 21:46 +0400

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