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util/fifo8: Introduce fifo8_drop() 

Add the fifo8_drop() helper for clarity.
It is a simple wrapper over fifo8_pop_buf().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>
Reviewed-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20240722160745.67904-8-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2024-07-22 13:37:48 +02:00
parent 23ad571173
commit e4e9db2562
3 changed files with 16 additions and 1 deletions
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2
hw/scsi/esp.c
View File

@ -351,7 +351,7 @@ static void do_message_phase(ESPState *s)
/* Ignore extended messages for now */
if (s->cmdfifo_cdb_offset) {
int len = MIN(s->cmdfifo_cdb_offset, fifo8_num_used(&s->cmdfifo));
fifo8_pop_buf(&s->cmdfifo, NULL, len);
fifo8_drop(&s->cmdfifo, len);
s->cmdfifo_cdb_offset = 0;
}
}

9
include/qemu/fifo8.h
View File

@ -131,6 +131,15 @@ const uint8_t *fifo8_pop_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numptr);
*/
const uint8_t *fifo8_peek_bufptr(Fifo8 *fifo, uint32_t max, uint32_t *numptr);
/**
* fifo8_drop:
* @fifo: FIFO to drop bytes
* @len: number of bytes to drop
*
* Drop (consume) bytes from a FIFO.
*/
void fifo8_drop(Fifo8 *fifo, uint32_t len);
/**
* fifo8_reset:
* @fifo: FIFO to reset

6
util/fifo8.c
View File

@ -131,6 +131,12 @@ uint32_t fifo8_pop_buf(Fifo8 *fifo, uint8_t *dest, uint32_t destlen)
return n1 + n2;
}
void fifo8_drop(Fifo8 *fifo, uint32_t len)
{
len -= fifo8_pop_buf(fifo, NULL, len);
assert(len == 0);
}
bool fifo8_is_empty(Fifo8 *fifo)
{
return (fifo->num == 0);