From mboxrd@z Thu Jan  1 00:00:00 1970
From: Clemens Ladisch <clemens@ladisch.de>
Subject: Re: Question on wait_for_avail function
Date: Wed, 05 Jun 2013 11:17:23 +0200
Message-ID: <51AF0223.5020901@ladisch.de>
References: <1794d77072add642c43309c0a06bfadb.squirrel@www.codeaurora.org>
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To: gsantosh@codeaurora.org
Cc: tiwai@suse.de, alsa-devel@alsa-project.org, lgirdwood@gmail.com
List-Id: alsa-devel@alsa-project.org

gsantosh@codeaurora.org wrote:
> 2) HAL issues pause in parallel to the write

This is illegal.
<http://www.alsa-project.org/main/index.php/SMP_Design> says:
| The use of returned handles [such as snd_pcm_t*] must be serialized in
| the application using own locking scheme.

If you want to issue a pause while waiting for data to be written, use
non-blocking writes.


Regards,
Clemens