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fifo8: introduce fifo8_peek() function

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This allows uses to peek the byte at the current head of the FIFO.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Octavian Purdila <tavip@google.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-ID: <20240828122258.928947-9-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 13:22:57 +01:00 • committed by Philippe Mathieu-Daudé
parent 28fbf33b3f
commit 570bf14394
2 changed files with 17 additions and 0 deletions
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11
include/qemu/fifo8.h
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@ -62,6 +62,17 @@ void fifo8_push_all(Fifo8 *fifo, const uint8_t *data, uint32_t num);
*/
uint8_t fifo8_pop(Fifo8 *fifo);
/**
* fifo8_peek:
* @fifo: fifo to peek from
*
* Peek the data byte at the current head of the FIFO. Clients are responsible
* for checking for emptyness using fifo8_is_empty().
*
* Returns: The peeked data byte.
*/
uint8_t fifo8_peek(Fifo8 *fifo);
/**
* fifo8_pop_buf:
* @fifo: FIFO to pop from