Hi Artem,
Please refer to comments below, thanks!
Artem.Kachitchkin at Sun.COM <mailto:Artem.Kachitchkin at Sun.COM> wrote:
>> 4.2.5. Register CPU idle notification callback
>> int cpu_idle_register_callback(uint_t priority,
>> cpu_idle_callback_t *callbackp, void *arg, void **hdlpp);
>> This interface registers a callback to be called when CPU idle state
>> changes. All registered callbacks will be called in priority order
>> from high to low when CPU enters idle state and will be called in
>> reverse order when CPU exits idle state.
>> Argument priority is used to determine the calling order of
>> registered callbacks. Argument arg will be passed back to
>> registered callback and how to use it is determined by callback.
>
> What are possible return values and their meaning?
The return value is zero on success or error number on failure.
>
> On architectures that do not implement this functionality (sparc?),
> will these functions exist, i.e. will consumers be #ifdef free, and
> if so, what's the behavior: fail callback registration, or succeed
> but never callback.
On platform which doesn't support such a mechanism, the registration will
succeed but the registered callbacks won't be called.
>
> -Artem
Liu Jiang (Gerry)
OpenSolaris, OTC, SSG, Intel
