Use of Thread::Cancel

[Matt Scifo]

Hello

I am having some problems understanding exactly how to cancel a thread.

I want to be able to issue a cancel request to a thread from another
thread (not a parent) and have it cancel only if it has not reached  a
certain execution point.  If that point has been reached, then the
cancel shouldn't be performed until a set point.

The docs talk about using cancelDeferred and setting a cancellation
point "such as yield".  I'm not quite sure how to set a specific
cancellation point.

Here is some exmaple code that shows what I am trying to do...

while(!stop_running)
{
    if (!_module_queue->empty())
    {
        void *target;
        // _module_queue is a class derived from Buffer.
        // This call blocks until something has been posted
        // to the queue.
        //
        // Do not cancel beyond this point until cancellation
        // point has been reached!
        _module_queue->wait(&target);

        while(start_important_operations_with_target)
        {
            // do not process a cancel() request until this
            // block finishes.
        }

        // set cancellation point here.
        // cancel() can now take affect.
    }
}


Can anyone offer any insight?

I am using RH9, g++ 2.9.6, and commoncpp2 v1.0.13.

Thanks

Matt Scifo