---
name: "snd_pcm_hw_constraint_mask64"
section: "9"
platform: "linux"
package: "linux-manual-4.9"
version: "4.9.228-1"
release: "Debian 9 (Stretch)"
platforms: ["linux"]
url: "https://new.carta.tech/snd_pcm_hw_constraint_mask64"
---

# snd\_pcm\_hw\_constraint\_mask64(9)

apply the given bitmap mask constraint

## NAME

snd\_pcm\_hw\_constraint\_mask64 - apply the given bitmap mask constraint

## SYNOPSIS

**int snd\_pcm\_hw\_constraint\_mask64(struct snd\_pcm\_runtime \*** *runtime***, snd\_pcm\_hw\_param\_t** *var***, u\_int64\_t** *mask***);**

## ARGUMENTS

*runtime*

PCM runtime instance

*var*

hw\_params variable to apply the mask

*mask*

the 64bit bitmap mask

## DESCRIPTION

Apply the constraint of the given bitmap mask to a 64-bit mask parameter.

## RETURN

Zero if successful, or a negative error code on failure.

## COPYRIGHT