[alsa-devel] pcm_oss: Can period_bytes - buffer_used be less than 0?

[Takashi Iwai]

At Wed, 04 Mar 2009 16:32:23 +0100,
Roel Kluin wrote:
> 
> vi sound/core/oss/pcm_oss.c +1572 (in linus' git tree) and note:
> 
> static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
> {
> 	...
> 	size_t size;
> 	... :1608
> 	size = runtime->oss.period_bytes - runtime->oss.period_ptr;
> 
> can this period_bytes - buffer_used become less than 0?

You mean "period_bytes - period_ptr"?
Then no, period_ptr is always smaller than period_bytes.


Takashi