unix-internal anybody?

[Jeppe Sommer]

This should be perfect as QNX 4 has setitimer but no
ITIMER_VIRTUAL. QNX 4 does not define SIGVTALRM either.

/Jeppe


Godmar Back writes:
 > > 
 > > Jeppe Sommer writes:
 > > 
 > > QNX 4 doesn't support ITIMER_VIRTUAL timers, and consequently cannot
 > > use jthreads as is. Would it be possible to let jthreads default to
 > > non-preemptive scheduling when ITIMER_VIRTUAL is not defined? In that
 > > case QNX 4 could use jthreads. 
 > > 
 > 
 > Currently, jthreads assumes that ITIMER_VIRTUAL works if HAVE_SETITIMER
 > is defined.  See the #if defined(HAVE_SETITIMER) surrounding the
 > activate_time_slicing/deactivate_time_slicing definitions.
 > 
 > It's already defaulting to non-preemptive scheduling if setitimer isn't 
 > there.  We can certainly add a && defined(ITIMER_VIRTUAL) is that will
 > do.  Plus, we may want to exclude the call to catchSignal(SIGVTALRM) too.
 > 
 > 	- Godmar
 > 
 > > 
 > >  > 
 > >  >  Is anybody still relying on the old, non-preemptive internal threading
 > >  > system (i.e. you configure with --with-threads=unix-internal)?
 > >  > 
 > >  > This would be the case for systems that do not provide support for
 > >  > asynchronous/non-blocking I/O.
 > >  > 
 > >  > It will be nuked soon from the CVS repository.  However, if people depend
 > >  > on the ability to use kaffe on systems that do not provide support for
 > >  > asynchronous I/O, we could integrate this ability in the unix-jthreads code.
 > >  > 
 > >  > 	- Godmar
 > >  > 
 > > 
 > > 
 > 
 >