[PATCH 05/12] kern_tc.c: Replace atomic functions required by PPS API

[Sebastian Huber]

On 07/04/2022 10:36, Gabriel Moyano wrote:
> ---
>   cpukit/include/sys/timepps.h | 4 ++++
>   cpukit/score/src/kern_tc.c   | 7 +++++++
>   2 files changed, 11 insertions(+)
> 
> diff --git a/cpukit/include/sys/timepps.h b/cpukit/include/sys/timepps.h
> index 621afb08ec..5703381ffa 100644
> --- a/cpukit/include/sys/timepps.h
> +++ b/cpukit/include/sys/timepps.h
> @@ -32,7 +32,11 @@
>   
>   typedef int pps_handle_t;	
>   
> +#ifndef __rtems__
>   typedef unsigned pps_seq_t;
> +#else /* __rtems__ */
> +typedef Atomic_Uint	pps_seq_t;
> +#endif /* __rtems__ */
>   
>   typedef struct ntp_fp {
>   	unsigned int	integral;
> diff --git a/cpukit/score/src/kern_tc.c b/cpukit/score/src/kern_tc.c
> index e57da2c0ca..77f7a9212c 100644
> --- a/cpukit/score/src/kern_tc.c
> +++ b/cpukit/score/src/kern_tc.c
> @@ -1932,10 +1932,17 @@ pps_fetch(struct pps_fetch_args *fapi, struct pps_state *pps)
>   			tv.tv_usec = fapi->timeout.tv_nsec / 1000;
>   			timo = tvtohz(&tv);
>   		}
> +#ifndef __rtems__
>   		aseq = atomic_load_int(&pps->ppsinfo.assert_sequence);
>   		cseq = atomic_load_int(&pps->ppsinfo.clear_sequence);
>   		while (aseq == atomic_load_int(&pps->ppsinfo.assert_sequence) &&
>   		    cseq == atomic_load_int(&pps->ppsinfo.clear_sequence)) {
> +#else /* __rtems__ */
> +		aseq = atomic_load_acq_int(&pps->ppsinfo.assert_sequence);
> +		cseq = atomic_load_acq_int(&pps->ppsinfo.clear_sequence);
> +		while (aseq == atomic_load_acq_int(&pps->ppsinfo.assert_sequence) &&
> +		    cseq == atomic_load_acq_int(&pps->ppsinfo.clear_sequence)) {
> +#endif /* __rtems__ */
>   			if (abi_aware(pps, 1) && pps->driver_mtx != NULL) {
>   				if (pps->flags & PPSFLAG_MTX_SPIN) {
>   					err = msleep_spin(pps, pps->driver_mtx,

Why do you need this change?

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