snd_pcm_close()

Updated: May 06, 2022

Close a PCM handle and free its resources

Synopsis:

#include <sys/asoundlib.h>

int snd_pcm_close( snd_pcm_t *handle );

Arguments:

handle
The handle for the PCM device, which you must have opened by calling snd_pcm_open_name(), snd_pcm_open(), or snd_pcm_open_preferred().

Library:

libasound.so

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

Description:

The snd_pcm_close() function frees all resources allocated with the audio handle and closes the connection to the PCM interface.

Returns:

EOK on success, a negative errno upon failure. The errno values are available in the errno.h file.

Errors:

-EINTR
The close() call was interrupted by a signal.
-EINVAL
The state of handle is invalid or an invalid state change occurred. You can call snd_pcm_channel_status() to check if the state change was invalid.
-EIO
An I/O error occurred while updating the directory information.
-ENOSPC
A previous buffered write call has failed.

Classification:

QNX Neutrino

Safety:  
Cancellation point No
Interrupt handler No
Signal handler Yes
Thread Read the Caveats

Caveats:

This function is not thread safe if handle (snd_pcm_t) is used across multiple threads.