Re: cmpxchgl on x86?
Re: cmpxchgl on x86?
- Subject: Re: cmpxchgl on x86?
- From: David Leimbach <email@hidden>
- Date: Fri, 24 Jun 2005 08:09:03 -0700
On 6/24/05, David Leimbach <email@hidden> wrote:
> On 6/24/05, Jonas Maebe <email@hidden> wrote:
> >
> > On 24 jun 2005, at 16:40, David Leimbach wrote:
> >
> > >> Also, there are compare-and-swap routines already in libSystem:
> > >>
> > >> <libkern/OSAtomic.h>
> > >>
> > >> /* Compare and swap. They return true if the swap occured.
> > >> */
> > >> bool OSAtomicCompareAndSwap32( int32_t oldValue, int32_t newValue,
> > >> int32_t *theValue );
> > >> bool OSAtomicCompareAndSwap32Barrier( int32_t oldValue, int32_t
> > >> newValue, int32_t *theValue );
> > >
> > > Seems a shame to have to include an entire other framework just for a
> > > single assembly instruction :). It'd be really cool if apple had a
> > > lighter weight wrapper around such lock code :).
> >
> > libSystem = libc
>
> Note he wants me to use libkern. Which is it? :)
>
It seems tiger's libSystem differs here from Panther's too.
When in doubt, stick it in libSystem? :)
I guess that's better than the 20 libraries I need to link in all the
support I need for virtually any application that does networking on
Solaris :).
Dave
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