ip stack mutual exclusion

[Joel Sherrill]

Jennifer Averritt wrote:
> 
> On Wed, 19 Jan 2000 Fermi at aol.com wrote:
> 
> > I am adding a security association database to the
> > RTEMS IP-stack to support IPSEC.
> >
> > I would like to run RTEMS with a
> > thread time slice, but a thread that is acessing the database when its
> time quantum expires might leave
> > it in an unstable state.
> 
> Try:
> 
> rtems_task_mode( RTEMS_NO_PREEMPT, RTEMS_PREEMPT_MASK, &pmode);
> rtems_task_mode( RTEMS_PREEMPT, RTEMS_PREEMPT_MASK, &pmode);
> 
> To protect against an isr you can use:
> 
> rtems_interrupt_disable( level );
> rtems_interrupt_enable( level );

In general, this is correct.  But in this case, the network stack is 
already protected by a binary semaphore.
 
> Jennifer

-- 
Joel Sherrill, Ph.D.             Director of Research & Development
joel at OARcorp.com                 On-Line Applications Research
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