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From: jp2code on 6 Jun 2007 10:04
Ok. Between the two replies, it is obvious that setting a BOOL value is the
wrong way to go.

There is only the main thread and the worker thread (2 threads).

Now the question becomes:

* Should I use a mutex or something else?

I'm leaning towards a mutex after reading many of Joseph Newcomer's essays,
but it is a lot of information on those essays, and I may have missed the
big picture.


From: Scott McPhillips [MVP] on 6 Jun 2007 10:40
jp2code wrote:
> Ok. Between the two replies, it is obvious that setting a BOOL value is the
> wrong way to go.
>
> There is only the main thread and the worker thread (2 threads).
>
> Now the question becomes:
>
> * Should I use a mutex or something else?
>
> I'm leaning towards a mutex after reading many of Joseph Newcomer's essays,
> but it is a lot of information on those essays, and I may have missed the
> big picture.
>
>
You should use a CRITICAL_SECTION. Between threads of the same process
it provides the same functionality as a mutex but is a lot more
efficient. A mutex is required when synchronizing multiple programs, a
critical section when synchronizing multiple threads within the same
program.

You initialize the critical section, then each thread does the following:

EnterCriticalSection(&cs);
....access the shared resource
LeaveCriticalSection(&cs);

While thread A is between the calls, thread B is suspended if it calls
EnterCriticalSection. When A leaves, B resumes.
--
Scott McPhillips [MVP VC++]

From: Joseph M. Newcomer on 6 Jun 2007 10:57
You need a mutual exclusion mechanism. A mutex and a CRITICAL_SECTION would both work. If
you need a timeout, you will have to use a mutex, but if you would be waiting INFINITE,
then a CRITICAL_SECTION is a better choice. Also, a mutex would allow you to
WaitForMultipleObjects in case you want to implement a shutdown scenario.
joe

On Wed, 6 Jun 2007 09:04:21 -0500, "jp2code" <poojo.com/mail> wrote:

>Ok. Between the two replies, it is obvious that setting a BOOL value is the
>wrong way to go.
>
>There is only the main thread and the worker thread (2 threads).
>
>Now the question becomes:
>
>* Should I use a mutex or something else?
>
>I'm leaning towards a mutex after reading many of Joseph Newcomer's essays,
>but it is a lot of information on those essays, and I may have missed the
>big picture.
>
Joseph M. Newcomer [MVP]
email: newcomer(a)flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm
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