void snd_seq_cell_free(struct snd_seq_event_cell * cell)
{
unsigned long flags;
struct snd_seq_pool *pool;
if (snd_BUG_ON(!cell))
return;
pool = cell->pool;
if (snd_BUG_ON(!pool))
return;
spin_lock_irqsave(&pool->lock, flags);
free_cell(pool, cell);
if (snd_seq_ev_is_variable(&cell->event)) {
if (cell->event.data.ext.len & SNDRV_SEQ_EXT_CHAINED) {
struct snd_seq_event_cell *curp, *nextptr;
curp = cell->event.data.ext.ptr;
for (; curp; curp = nextptr) {
nextptr = curp->next;
curp->next = pool->free;
free_cell(pool, curp);
}
}
}
if (waitqueue_active(&pool->output_sleep)) {
if (snd_seq_output_ok(pool))
wake_up(&pool->output_sleep);
}
spin_unlock_irqrestore(&pool->lock, flags);
}
void snd_seq_cell_free(snd_seq_event_cell_t * cell)
{
unsigned long flags;
pool_t *pool;
snd_assert(cell != NULL, return);
pool = cell->pool;
snd_assert(pool != NULL, return);
spin_lock_irqsave(&pool->lock, flags);
free_cell(pool, cell);
if (snd_seq_ev_is_variable(&cell->event)) {
if (cell->event.data.ext.len & SNDRV_SEQ_EXT_CHAINED) {
snd_seq_event_cell_t *curp, *nextptr;
curp = cell->event.data.ext.ptr;
for (; curp; curp = nextptr) {
nextptr = curp->next;
curp->next = pool->free;
free_cell(pool, curp);
}
}
}
if (waitqueue_active(&pool->output_sleep)) {
/* has enough space now? */
if (snd_seq_output_ok(pool))
wake_up(&pool->output_sleep);
}
spin_unlock_irqrestore(&pool->lock, flags);
}
/*
* duplicate the event to a cell.
* if the event has external data, the data is decomposed to additional
* cells.
*/
int snd_seq_event_dup(struct snd_seq_pool *pool, struct snd_seq_event *event,
struct snd_seq_event_cell **cellp, int nonblock,
struct file *file)
{
int ncells, err;
unsigned int extlen;
struct snd_seq_event_cell *cell;
*cellp = NULL;
ncells = 0;
extlen = 0;
if (snd_seq_ev_is_variable(event)) {
extlen = event->data.ext.len & ~SNDRV_SEQ_EXT_MASK;
ncells = (extlen + sizeof(struct snd_seq_event) - 1) / sizeof(struct snd_seq_event);
}
if (ncells >= pool->total_elements)
return -ENOMEM;
err = snd_seq_cell_alloc(pool, &cell, nonblock, file);
if (err < 0)
return err;
/* copy the event */
cell->event = *event;
/* decompose */
if (snd_seq_ev_is_variable(event)) {
int len = extlen;
int is_chained = event->data.ext.len & SNDRV_SEQ_EXT_CHAINED;
int is_usrptr = event->data.ext.len & SNDRV_SEQ_EXT_USRPTR;
struct snd_seq_event_cell *src, *tmp, *tail;
char *b
/*
* duplicate the event to a cell.
* if the event has external data, the data is decomposed to additional
* cells.
*/
int snd_seq_event_dup(pool_t *pool, snd_seq_event_t *event, snd_seq_event_cell_t **cellp, int nonblock, struct file *file)
{
int ncells, err;
unsigned int extlen;
snd_seq_event_cell_t *cell;
*cellp = NULL;
ncells = 0;
extlen = 0;
if (snd_seq_ev_is_variable(event)) {
extlen = event->data.ext.len & ~SNDRV_SEQ_EXT_MASK;
ncells = (extlen + sizeof(snd_seq_event_t) - 1) / sizeof(snd_seq_event_t);
}
if (ncells >= pool->total_elements)
return -ENOMEM;
err = snd_seq_cell_alloc(pool, &cell, nonblock, file);
if (err < 0)
return err;
/* copy the event */
cell->event = *event;
/* decompose */
if (snd_seq_ev_is_variable(event)) {
int len = extlen;
int is_chained = event->data.ext.len & SNDRV_SEQ_EXT_CHAINED;
int is_usrptr = event->data.ext.len & SNDRV_SEQ_EXT_USRPTR;
snd_seq_event_cell_t *src, *tmp, *tail;
char *buf;
cell->event.data.ext.len = extlen | SNDRV_SEQ_EXT_CHAINED;
cell->event.data.ext.ptr = NULL;
src = (snd_seq_event_cell_t*)event->data.ext.ptr;
buf = (char *)event->data.ext.ptr;
tail = NULL;
while (ncells-- > 0) {
int size = sizeof(snd_seq_event_t);
if (len < size)
size = len;
err = snd_seq_cell_alloc(pool, &tmp, nonblock, file);
if (err < 0)
goto __error;
if (cell->event.data.ext.ptr == NULL)
cell->event.data.ext.ptr = tmp;
if (tail)
tail->next = tmp;
tail = tmp;
/* copy chunk */
if (is_chained && src) {
tmp->event = src->event;
src = src->next;
} else if (is_usrptr) {
if (copy_from_user(&tmp->event, buf, size)) {
err = -EFAULT;
goto __error;
}
} else {
memcpy(&tmp->event, buf, size);
}
buf += size;
len -= size;
}
}
*cellp = cell;
return 0;
__error:
snd_seq_cell_free(cell);
return err;
}
