Re: CVS commit: src/common/lib/libc/atomic

[Nick Hudson <nick.hudson%gmx.co.uk@localhost>]

On 14/05/2022 06:35, Nick Hudson wrote:
> Module Name:	src
> Committed By:	skrll
> Date:		Sat May 14 05:35:55 UTC 2022
>
> Modified Files:
> 	src/common/lib/libc/atomic: atomic_c11_compare_exchange_cas_16.c
> 	    atomic_c11_compare_exchange_cas_32.c
> 	    atomic_c11_compare_exchange_cas_8.c

Commit message should have been

lib/56832: __atomic_compare_exchange[_n] is wrong on non-mainstream
platforms

Make the implementation match the documentation wrt 'expected'

This built-in function implements an atomic compare and exchange
operation.This compares the contents of *ptr with the contents of
*expected. If equal, the operation is a read-modify-write operation that
writes desired into *ptr. If they are not equal, the operation is a read
and the current contents of *ptr are written into *expected.