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fifo8: add fifo8_peek_buf() function

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This is a wrapper function around fifo8_peekpop_buf() that allows the
caller to peek into the FIFO, including handling the case where there
is a wraparound of 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: <20240828122258.928947-8-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 13:22:56 +01:00 • committed by Philippe Mathieu-Daudé
parent cfc65db19b
commit 28fbf33b3f
2 changed files with 19 additions and 0 deletions
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5
util/fifo8.c
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@ -140,6 +140,11 @@ uint32_t fifo8_pop_buf(Fifo8 *fifo, uint8_t *dest, uint32_t destlen)
return fifo8_peekpop_buf(fifo, dest, destlen, true);
}
uint32_t fifo8_peek_buf(Fifo8 *fifo, uint8_t *dest, uint32_t destlen)
{
return fifo8_peekpop_buf(fifo, dest, destlen, false);
}
void fifo8_drop(Fifo8 *fifo, uint32_t len)
{
len -= fifo8_pop_buf(fifo, NULL, len);