Re: cmpxchgl on x86?
Re: cmpxchgl on x86?
- Subject: Re: cmpxchgl on x86?
- From: Jonas Maebe <email@hidden>
- Date: Fri, 24 Jun 2005 16:45:08 +0200
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
Jonas
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