Method

ALSACtlCardlock_elem

Declaration [src]

gboolean
alsactl_card_lock_elem (
  ALSACtlCard* self,
  const ALSACtlElemId* elem_id,
  gboolean lock,
  GError** error
)

Description [src]

Lock/Unlock indicated element not to be written by the other processes.

The call of function executes ioctl(2) system call with SNDRV_CTL_IOCTL_ELEM_LOCK and SNDRV_CTL_IOCTL_ELEM_UNLOCK commands for ALSA control character device.

Parameters

`elem_id`	`ALSACtlElemId`
	A `ALSACtlElemId`.
	The data is owned by the caller of the function.
`lock`	`gboolean`
	Whether to lock or unlock the element.
`error`	`GError **`
	The return location for a `GError*`, or `NULL`.

Return value

Returns:	`gboolean`
	`TRUE` when the overall operation finishes successfully, else `FALSE`.