AW: Specific Linux syscalls for glibc API

[Szabolcs Nagy]

On 18/11/15 12:57, Warlich, Christof wrote:
> On 11/17/2015 05:34 PM, Joseph Myers wrote
>> * gettid, pthread_gettid_np (bug 6399).
>
> I'm not sure w.r.t. the added value of a gettid wrapper though: Assuming the
> availability of pthread_gettid_np(), pthread_gettid_np(pthread_self()) would
> (apart from some locking to prevent thread termination in the meantime) just
> do what gettid() is supposed to do.
>

i don't see why would you lock there.
(this api should be as-safe)

pthread_gettid_np is problematic api because of the
issue Florian raised (tid is lost after a thread
exited but not yet joined and that should not be
visible to the caller, so this api is only possible
to implement if tid handling is redesigned).