Experimental Physics and Industrial Control System
Hi Michael,
On 2012-06-11 Michael Davidsaver wrote:
> A better thing to do might be
>
> #if defined(vxWorks) || defined(__rtems__)
> typedef void* epicsSpinId
> #else
> typedef epicsMutexID* epicsSpinId
> #endif
Can we design the default implementation to use atomic variables instead of
mutexes, unless there really is no alternative? On a workstation OS the act
of taking or releasing a mutex always requires a context switch, whereas an
atomic operation does not. Spin-lock operations are supposed to be lighter
than a mutex ones on SMP, and that aspect of your suggestion is bothering me.
- Andrew
--
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-- Napoleon Bonaparte
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