// Find and transmit any scheduled steps prior to the given 'move_clock'
public int flush(ulong move_clock)
{
// Flush each stepcompress to the specified move_clock
int i;
for (i = 0; i < sc_list.Count; i++)
{
var sc = sc_list[i];
int ret = sc.flush(move_clock);
if (ret != 0)
{
return(ret);
}
}
// Order commands by the reqclock of each pending command
List <SerialQueue.RawMessage> msgs = new List <SerialQueue.RawMessage>();
while (true)
{
// Find message with lowest reqclock
ulong req_clock = SerialQueue.MAX_CLOCK;
var qm = new SerialQueue.RawMessage();
var scFound = default(stepcompress);
bool found = false;
for (i = 0; i < sc_list.Count; i++)
{
stepcompress sc = sc_list[i];
if (sc.msg_queue.Count != 0)
{
var m = sc.msg_queue.Peek();
if (m.req_clock < req_clock)
{
found = true;
scFound = sc;
qm = m;
req_clock = m.req_clock;
}
}
}
if (!found || (qm.min_clock != 0 && req_clock > move_clock))
{
break;
}
ulong next_avail = move_clocks[0];
if (qm.min_clock != 0)
{
// The qm.min_clock field is overloaded to indicate that
// the command uses the 'move queue' and to store the time
// that move queue item becomes available.
heap_replace(qm.min_clock);
}
// Reset the min_clock to its normal meaning (minimum transmit time)
qm.min_clock = next_avail;
qm = scFound.msg_queue.Dequeue();
// Batch this command
msgs.Add(qm);
}
// Transmit commands
if (msgs.Count != 0)
{
sq.send_batch(cq, msgs.ToArray());
}
return(0);
}