Hi Phil,

Replying to a message of Phil Crown to All:

 PC> ULONG  someFn()
 PC> {

 PC>   request.MutexSem();

 PC>   ULONG rc = 0;

Note rc is a stack variable, not static.

 PC>   rc = something;

 PC>   str = somethingtoo;  // this also needs protecting because str is
 PC>                        // used in another function that is also
 PC>                        // called by two or more threads.

 PC>   release.MutexSem();

 PC>   return rc;  // A calling thread is pre-empted here before returning
 PC> rc.

 PC>               // A second threads comes along and completes the
 PC>               // function before the first thread has finished,
 PC>               // thus causing rc to contain invalid data.
 PC>               // Is this possible?
 PC> }

No, because they're using different copies of rc.  It is possible though,
that str is changed, since the declaration of str isn't shown here, I
assume it's not an auto variable.

Thanks,
Mike

--- FleetStreet 1.17+