| Message ID | 20240828122258.928947-4-mark.cave-ayland@ilande.co.uk (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | fifo8: add fifo8_peek(), fifo8_peek_buf() and tests | expand |
On Wed, Aug 28, 2024 at 10:24 PM Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> wrote: > > The skip parameter specifies the number of bytes to be skipped from the current > FIFO head before the peek or pop operation. > > Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Alistair > --- > util/fifo8.c | 12 +++++++----- > 1 file changed, 7 insertions(+), 5 deletions(-) > > diff --git a/util/fifo8.c b/util/fifo8.c > index 5faa814a6e..62d6430b05 100644 > --- a/util/fifo8.c > +++ b/util/fifo8.c > @@ -72,18 +72,20 @@ uint8_t fifo8_pop(Fifo8 *fifo) > } > > static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo, uint32_t max, > - uint32_t *numptr, bool do_pop) > + uint32_t skip, uint32_t *numptr, > + bool do_pop) > { > uint8_t *ret; > uint32_t num, head; > > assert(max > 0 && max <= fifo->num); > - head = fifo->head; > + assert(skip <= fifo->num); > + head = (fifo->head + skip) % fifo->capacity; > num = MIN(fifo->capacity - head, max); > ret = &fifo->data[head]; > > if (do_pop) { > - fifo->head += num; > + fifo->head = head + num; > fifo->head %= fifo->capacity; > fifo->num -= num; > } > @@ -95,12 +97,12 @@ static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo, uint32_t max, > > const uint8_t *fifo8_peek_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numptr) > { > - return fifo8_peekpop_bufptr(fifo, max, numptr, false); > + return fifo8_peekpop_bufptr(fifo, max, 0, numptr, false); > } > > const uint8_t *fifo8_pop_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numptr) > { > - return fifo8_peekpop_bufptr(fifo, max, numptr, true); > + return fifo8_peekpop_bufptr(fifo, max, 0, numptr, true); > } > > uint32_t fifo8_pop_buf(Fifo8 *fifo, uint8_t *dest, uint32_t destlen) > -- > 2.39.2 > >
On Wed, Aug 28, 2024 at 5:23 AM Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> wrote: > > The skip parameter specifies the number of bytes to be skipped from the current > FIFO head before the peek or pop operation. > > Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> Reviewed-by: Octavian Purdila <tavip@google.com> > --- > util/fifo8.c | 12 +++++++----- > 1 file changed, 7 insertions(+), 5 deletions(-) > > diff --git a/util/fifo8.c b/util/fifo8.c > index 5faa814a6e..62d6430b05 100644 > --- a/util/fifo8.c > +++ b/util/fifo8.c > @@ -72,18 +72,20 @@ uint8_t fifo8_pop(Fifo8 *fifo) > } > > static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo, uint32_t max, > - uint32_t *numptr, bool do_pop) > + uint32_t skip, uint32_t *numptr, > + bool do_pop) > { > uint8_t *ret; > uint32_t num, head; > > assert(max > 0 && max <= fifo->num); > - head = fifo->head; > + assert(skip <= fifo->num); > + head = (fifo->head + skip) % fifo->capacity; > num = MIN(fifo->capacity - head, max); > ret = &fifo->data[head]; > > if (do_pop) { > - fifo->head += num; > + fifo->head = head + num; > fifo->head %= fifo->capacity; > fifo->num -= num; > } > @@ -95,12 +97,12 @@ static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo, uint32_t max, > > const uint8_t *fifo8_peek_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numptr) > { > - return fifo8_peekpop_bufptr(fifo, max, numptr, false); > + return fifo8_peekpop_bufptr(fifo, max, 0, numptr, false); > } > > const uint8_t *fifo8_pop_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numptr) > { > - return fifo8_peekpop_bufptr(fifo, max, numptr, true); > + return fifo8_peekpop_bufptr(fifo, max, 0, numptr, true); > } > > uint32_t fifo8_pop_buf(Fifo8 *fifo, uint8_t *dest, uint32_t destlen) > -- > 2.39.2 >
diff --git a/util/fifo8.c b/util/fifo8.c index 5faa814a6e..62d6430b05 100644 --- a/util/fifo8.c +++ b/util/fifo8.c @@ -72,18 +72,20 @@ uint8_t fifo8_pop(Fifo8 *fifo) } static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo, uint32_t max, - uint32_t *numptr, bool do_pop) + uint32_t skip, uint32_t *numptr, + bool do_pop) { uint8_t *ret; uint32_t num, head; assert(max > 0 && max <= fifo->num); - head = fifo->head; + assert(skip <= fifo->num); + head = (fifo->head + skip) % fifo->capacity; num = MIN(fifo->capacity - head, max); ret = &fifo->data[head]; if (do_pop) { - fifo->head += num; + fifo->head = head + num; fifo->head %= fifo->capacity; fifo->num -= num; } @@ -95,12 +97,12 @@ static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo, uint32_t max, const uint8_t *fifo8_peek_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numptr) { - return fifo8_peekpop_bufptr(fifo, max, numptr, false); + return fifo8_peekpop_bufptr(fifo, max, 0, numptr, false); } const uint8_t *fifo8_pop_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numptr) { - return fifo8_peekpop_bufptr(fifo, max, numptr, true); + return fifo8_peekpop_bufptr(fifo, max, 0, numptr, true); } uint32_t fifo8_pop_buf(Fifo8 *fifo, uint8_t *dest, uint32_t destlen)
The skip parameter specifies the number of bytes to be skipped from the current FIFO head before the peek or pop operation. Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> --- util/fifo8.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-)