SND_CTL_NOTIFY - Online Linux Manual PageSection : 9
Updated : June 2018
Source : Kernel Hackers Manual 2​.6​.
Note : Control/Mixer API

NAMEsnd_ctl_notify − Send notification to user−space for a control change

SYNOPSISvoid snd_ctl_notify(struct snd_card * card, unsigned int mask, struct snd_ctl_elem_id * id);

ARGUMENTScard the card to send notification mask the event mask, SNDRV_CTL_EVENT_* id the ctl element id to send notification

DESCRIPTIONThis function adds an event record with the given id and mask, appends to the list and wakes up the user−space for notification​. This can be called in the atomic context​.

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