Re: pthreads

[Neal H. Walfield]

> The critical piece of the thread implementation (any one) is cancellation. 
> This will work differently in pthreads then it works right now in
> cthreads.

Well sure it will work differently, but it is essentially, a
substitution.  Right now we use, for instance, hurd_condition_wait:

  if (hurd_condition_wait (&cond, &mutex))
    {
      mutex_unlock (&mutex);
      return EINTR;
    }

in pthreads we will do:

  pthread_cleanup_push (pthread_mutex_unlock, (void *) &mutex);
  pthread_condition_wait (&cond, &mutex);
  pthread_cleanup_pop (1);

Or are you trying to say something else that I am just missing?

Thanks.