On Thu, Dec 13, 2012 at 05:40:02PM +0100, Jean-Christophe PLAGNIOL-VILLARD
wrote:
> This will allow to implement a dmesg mecanism in barebox
>
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <[email protected]>
> ---
> include/kfifo.h | 2 ++
> lib/kfifo.c | 21 +++++++++++++++++++++
> 2 files changed, 23 insertions(+)
>
> diff --git a/include/kfifo.h b/include/kfifo.h
> index 25880f4..9dbbe0d 100644
> --- a/include/kfifo.h
> +++ b/include/kfifo.h
> @@ -74,5 +74,7 @@ static inline unsigned int kfifo_len(struct kfifo *fifo)
> void kfifo_putc(struct kfifo *fifo, unsigned char c);
> unsigned int kfifo_getc(struct kfifo *fifo, unsigned char *c);
>
> +void kfifo_dump_str(struct kfifo *fifo, void (*dump)(unsigned char c));
> +
> #endif
>
> diff --git a/lib/kfifo.c b/lib/kfifo.c
> index afd3894..7892aed 100644
> --- a/lib/kfifo.c
> +++ b/lib/kfifo.c
> @@ -154,3 +154,24 @@ unsigned int kfifo_getc(struct kfifo *fifo, unsigned
> char *c)
> return 0;
> }
>
> +void kfifo_dump_str(struct kfifo *fifo, void (*dump)(unsigned char c))
> +{
> + int i;
> + unsigned char *c;
> + unsigned int l;
> + unsigned int len;
> +
> + len = fifo->in - fifo->out;
> +
> + /* first get the data from fifo->out until the end of the buffer */
> + l = min(len, fifo->size - (fifo->out & (fifo->size - 1)));
> + c = fifo->buffer + (fifo->out & (fifo->size - 1));
> + for (i = 0; i < l; i++)
> + dump(c[i]);
> +
> + /* then get the rest (if any) from the beginning of the buffer */
> + c = fifo->buffer;
> + l = len - l;
> + for (i = 0; i < l; i++)
> + dump(c[i]);
> +}
This function works in the innards of the fifo implementation and
replaces these two lines of code:
while (kfifo_getc(console_output_fifo, &ch) == 0)
console_putc(CONSOLE_STDOUT, ch);
You do not provide a reason why we should do this, so: no.
Sascha
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