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fifo8: introduce head variable for fifo8_peekpop_bufptr()

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Rather than operate on fifo->head directly, introduce a new head
variable which is set to the value of fifo->head and use it instead.
This is to allow future adjustment of the head position within the
internal FIFO buffer.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Octavian Purdila <tavip@google.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240828122258.928947-3-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
This commit is contained in:
Mark Cave-Ayland 2024-08-28 13:22:51 +01:00 • committed by Philippe Mathieu-Daudé
parent f9309d965a
commit 0b73afec0e
1 changed files with 4 additions and 3 deletions
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7
util/fifo8.c
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@ -75,11 +75,12 @@ static const uint8_t *fifo8_peekpop_bufptr(Fifo8 *fifo, uint32_t max,
uint32_t *numptr, bool do_pop) uint32_t *numptr, bool do_pop)
{ {
uint8_t *ret; uint8_t *ret;
uint32_t num; uint32_t num, head;
assert(max > 0 && max <= fifo->num); assert(max > 0 && max <= fifo->num);
num = MIN(fifo->capacity - fifo->head, max); head = fifo->head;
ret = &fifo->data[fifo->head]; num = MIN(fifo->capacity - head, max);
ret = &fifo->data[head];
if (do_pop) { if (do_pop) {
fifo->head += num; fifo->head += num;