snd_cards()

Count the sound cards

Synopsis:

#include <sys/asoundlib.h>

int snd_cards ( void );

Library:

libasound.so

Use the -l asound option to qcc to link against this library.

Description:

The snd_cards() function returns the instantaneous number of sound cards that have running drivers. There's no guarantee that the sound cards have contiguous card numbers, and cards may be unmounted at any time.

This function is mainly provided for historical reasons. You should use snd_cards_list() instead.

Returns:

The number of sound cards.

Classification:

QNX Neutrino

Safety:
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Yes