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Added ctl_elem_lock and unlock code...

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This commit is contained in:
Jaroslav Kysela 2001-04-19 13:53:39 +00:00
parent 192d3c9226
commit 12a47782cb
4 changed files with 74 additions and 0 deletions
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30
src/control/control_shm.c
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@ -207,6 +207,34 @@ static int snd_ctl_shm_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *control)
return err;
}
static int snd_ctl_shm_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
{
snd_ctl_shm_t *shm = ctl->private_data;
volatile snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
int err;
ctrl->u.element_lock = *id;
ctrl->cmd = SNDRV_CTL_IOCTL_ELEM_LOCK;
err = snd_ctl_shm_action(ctl);
if (err < 0)
return err;
*id = ctrl->u.element_lock;
return err;
}
static int snd_ctl_shm_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
{
snd_ctl_shm_t *shm = ctl->private_data;
volatile snd_ctl_shm_ctrl_t *ctrl = shm->ctrl;
int err;
ctrl->u.element_unlock = *id;
ctrl->cmd = SNDRV_CTL_IOCTL_ELEM_UNLOCK;
err = snd_ctl_shm_action(ctl);
if (err < 0)
return err;
*id = ctrl->u.element_unlock;
return err;
}
static int snd_ctl_shm_hwdep_next_device(snd_ctl_t *ctl, int * device)
{
snd_ctl_shm_t *shm = ctl->private_data;
@ -362,6 +390,8 @@ snd_ctl_ops_t snd_ctl_shm_ops = {
element_info: snd_ctl_shm_elem_info,
element_read: snd_ctl_shm_elem_read,
element_write: snd_ctl_shm_elem_write,
element_lock: snd_ctl_shm_elem_lock,
element_unlock: snd_ctl_shm_elem_unlock,
hwdep_next_device: snd_ctl_shm_hwdep_next_device,
hwdep_info: snd_ctl_shm_hwdep_info,
pcm_next_device: snd_ctl_shm_pcm_next_device,