Messages in this thread | | | Date | Thu, 7 Feb 2002 14:02:19 -0700 | From | yodaiken@fsmlabs ... | Subject | Re: [RFC] New locking primitive for 2.5 |
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On Thu, Feb 07, 2002 at 12:57:19PM -0800, Andrew Morton wrote: > yodaiken@fsmlabs.com wrote: > > > > llseek: > > atomic_enquee request > > if no room gotta sleep > > else if trylock mutex > > return > > else > > do work > > loop: > > process any pending requests > > release lock; > > if pending_requests && !(trylock mutex) goto loop > > This is how printk() works. It was a very powerful and satisfactory > solution to a nasty locking/atomicity problem. It'd be nice to have > a more generic way of expressing that solution.
note how I put in the goto so Ingo would be more happy with it -)
> > -
-- --------------------------------------------------------- Victor Yodaiken Finite State Machine Labs: The RTLinux Company. www.fsmlabs.com www.rtlinux.com
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