[Tinyos-devel] Will safe protect this kind of code?

[Eric Decker]

In particular, current_thread comes from either remove or dequeue.  I've
seen situations when we were messing with early thread code where
current_thread actual got NULL and it wreck havoc.

Will safe and deputy detect current_thread becoming NULL?

Alternatively, I could do something like:

if (!current_thread)
    panic(...);
else
    current_thread->state = TOSTHREAD_STATE_ACTIVE;

but that is ugly.

eric


  void scheduleNextThread() {
    if(tos_thread->state == TOSTHREAD_STATE_READY)
      current_thread = call ThreadQueue.remove(&ready_queue, tos_thread);
    else
      current_thread = call ThreadQueue.dequeue(&ready_queue);

    current_thread->state = TOSTHREAD_STATE_ACTIVE;
  }


-- 
Eric B. Decker
Senior (over 50 :-) Researcher
Autonomous Systems Lab
Jack Baskin School of Engineering
UCSC
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.millennium.berkeley.edu/pipermail/tinyos-devel/attachments/20080813/59700893/attachment.htm