void SWNUI::update()
{
if(mode == M_CONTINUOUS)
mode_continuous();
else
mode_gesture();
}
/**
* locking_reserve - reserve a slot in the buffer for an event.
* @rchan: the channel
* @slot_len: the length of the slot to reserve
* @ts: variable that will receive the time the slot was reserved
* @tsc: the timestamp counter associated with time
* @err: receives the result flags
* @interrupting: if this write is interrupting another, set to non-zero
*
* Returns pointer to the beginning of the reserved slot, NULL if error.
*
* The err value contains the result flags and is an ORed combination
* of the following:
*
* RELAY_BUFFER_SWITCH_NONE - no buffer switch occurred
* RELAY_EVENT_DISCARD_NONE - event should not be discarded
* RELAY_BUFFER_SWITCH - buffer switch occurred
* RELAY_EVENT_DISCARD - event should be discarded (all buffers are full)
* RELAY_EVENT_TOO_LONG - event won't fit into even an empty buffer
*/
inline char *
locking_reserve(struct rchan *rchan,
u32 slot_len,
struct timeval *ts,
u32 *tsc,
int *err,
int *interrupting)
{
u32 buffers_ready;
int bytes_written;
*err = RELAY_BUFFER_SWITCH_NONE;
if (slot_len >= rchan->buf_size) {
*err = RELAY_WRITE_DISCARD | RELAY_WRITE_TOO_LONG;
return NULL;
}
if (rchan->initialized == 0) {
rchan->initialized = 1;
get_timestamp(&rchan->buf_start_time,
&rchan->buf_start_tsc, rchan);
rchan->unused_bytes[0] = 0;
bytes_written = rchan->callbacks->buffer_start(
rchan->id, cur_write_pos(rchan),
rchan->buf_id, rchan->buf_start_time,
rchan->buf_start_tsc, using_tsc(rchan));
cur_write_pos(rchan) += bytes_written;
*tsc = get_time_delta(ts, rchan);
return cur_write_pos(rchan);
}
*tsc = get_time_delta(ts, rchan);
if (in_progress_event_size(rchan)) {
interrupted_pos(rchan) = cur_write_pos(rchan);
cur_write_pos(rchan) = in_progress_event_pos(rchan)
+ in_progress_event_size(rchan)
+ interrupting_size(rchan);
*interrupting = 1;
} else {
in_progress_event_pos(rchan) = cur_write_pos(rchan);
in_progress_event_size(rchan) = slot_len;
interrupting_size(rchan) = 0;
}
if (cur_write_pos(rchan) + slot_len > write_limit(rchan)) {
if (atomic_read(&rchan->suspended) == 1) {
in_progress_event_pos(rchan) = NULL;
in_progress_event_size(rchan) = 0;
interrupting_size(rchan) = 0;
*err = RELAY_WRITE_DISCARD;
return NULL;
}
buffers_ready = rchan->bufs_produced - rchan->bufs_consumed;
if (buffers_ready == rchan->n_bufs - 1) {
if (!mode_continuous(rchan)) {
atomic_set(&rchan->suspended, 1);
in_progress_event_pos(rchan) = NULL;
in_progress_event_size(rchan) = 0;
interrupting_size(rchan) = 0;
get_timestamp(ts, tsc, rchan);
switch_buffers(*ts, *tsc, rchan, 0, 0, 1);
recalc_time_delta(ts, tsc, rchan);
rchan->half_switch = 1;
cur_write_pos(rchan) = write_buf_end(rchan) - 1;
*err = RELAY_BUFFER_SWITCH | RELAY_WRITE_DISCARD;
return NULL;
}
}
get_timestamp(ts, tsc, rchan);
switch_buffers(*ts, *tsc, rchan, 0, 0, 0);
recalc_time_delta(ts, tsc, rchan);
*err = RELAY_BUFFER_SWITCH;
}
return cur_write_pos(rchan);
}