[dpdk-dev] [PATCH] eal/windows: fix pthreads macros return values

[Dmitry Kozlyuk]

2021-04-12 07:59 (UTC+0000), Tal Shnaiderman:
> > Subject: Re: [PATCH] eal/windows: fix pthreads macros return values
> > 
> > External email: Use caution opening links or attachments
> > 
> > 
> > Hi Tal,
> > 
> > Getting warnings from x86_64-w64-mingw32-gcc (GCC) 9.3.0:
> > 
> > ../../../lib/librte_eal/common/eal_common_thread.c: In function
> > ‘ctrl_params_free’:
> > ../../../lib/librte_eal/windows/include/pthread.h:42:2: warning: value
> > computed is not used [-Wunused-value]
> >    42 |  !DeleteSynchronizationBarrier(barrier)
> > 
> > Probably applies to other functions and may fire in combination with future
> > backported patches. Hopefully since 21.05 there will be new threading API.  
> 
> Thanks Dmitry, it's odd that the compiler complains only now, I'd expect to see this warning even before the change.

These functions don't have "nodiscard"-like attributes,
so a call without using result was OK, now it's an expression.

> Do we know if the new threading API will be in 21.05? API changes close in 3 days and I didn't see it get reviewed/acked.
> I can change only pthread_barrier_init for now, since currently without this change Windows runtime is broken, what do you think? 

(You probably mean pthread_barrier_destroy(), from which the warning comes.)
Yes, this is worth merging as soon as warnings are fixed.
Not sure new threading API will make it into 21.05.