//void trigger(int trigid, const attotime &after = attotime::zero);
//-------------------------------------------------
// boost_interleave - temporarily boosts the
// interleave factor
//-------------------------------------------------
public void boost_interleave(attotime timeslice_time, attotime boost_duration)
{
// ignore timeslices > 1 second
if (timeslice_time.seconds() > 0)
{
return;
}
add_scheduling_quantum(timeslice_time, boost_duration);
}
//-------------------------------------------------
// add_scheduling_quantum - add a scheduling
// quantum; the smallest active one is the one
// that is in use
//-------------------------------------------------
void add_scheduling_quantum(attotime quantum, attotime duration)
{
assert(quantum.seconds() == 0);
attotime curtime = time();
attotime expire = curtime + duration;
attoseconds_t quantum_attos = quantum.attoseconds();
// figure out where to insert ourselves, expiring any quanta that are out-of-date
quantum_slot insert_after = null;
quantum_slot next;
for (quantum_slot quant = m_quantum_list.first(); quant != null; quant = next)
{
// if this quantum is expired, nuke it
next = quant.next();
if (curtime >= quant.expire())
{
m_quantum_allocator.reclaim(m_quantum_list.detach(quant));
}
// if this quantum is shorter than us, we need to be inserted afterwards
else if (quant.requested() <= quantum_attos)
{
insert_after = quant;
}
}
// if we found an exact match, just take the maximum expiry time
if (insert_after != null && insert_after.requested() == quantum_attos)
{
insert_after.expire_set(attotime.Max(insert_after.expire(), expire));
}
// otherwise, allocate a new quantum and insert it after the one we picked
else
{
quantum_slot quant = m_quantum_allocator.alloc();
quant.requested_set(quantum_attos);
quant.actual_set(Math.Max(quantum_attos, m_quantum_minimum));
quant.expire_set(expire);
m_quantum_list.insert_after(quant, insert_after);
}
}
// execution
//-------------------------------------------------
// timeslice - execute all devices for a single
// timeslice
//-------------------------------------------------
public void timeslice()
{
bool call_debugger = (machine().debug_flags_get & machine_global.DEBUG_FLAG_ENABLED) != 0;
// build the execution list if we don't have one yet
//if (UNEXPECTED(m_execute_list == null))
if (m_execute_list == null)
{
rebuild_execute_list();
}
// if the current quantum has expired, find a new one
while (m_basetime >= m_quantum_list.first().expire())
{
m_quantum_allocator.reclaim(m_quantum_list.detach_head());
}
// loop until we hit the next timer
while (m_basetime < m_timer_list.expire())
{
// by default, assume our target is the end of the next quantum
attotime target = m_basetime + new attotime(0, m_quantum_list.first().actual());
// however, if the next timer is going to fire before then, override
if (m_timer_list.expire() < target)
{
target = m_timer_list.expire();
}
if (machine().video().frame_update_count() % 1000 == 0)
{
//LOG(("------------------\n"));
LOG("device_scheduler.timeslice() - cpu_timeslice: target = {0}, m_timer_list.expire: {1}\n", target.as_string(), m_timer_list.expire().as_string());
}
// do we have pending suspension changes?
if (m_suspend_changes_pending)
{
apply_suspend_changes();
}
// loop over all CPUs
for (device_execute_interface exec = m_execute_list; exec != null; exec = exec.nextexec)
{
// only process if this CPU is executing or truly halted (not yielding)
// and if our target is later than the CPU's current time (coarse check)
//if (EXPECTED((exec.m_suspend == 0 || exec.m_eatcycles) && target.seconds >= exec.m_localtime.seconds))
if ((exec.suspend_ == 0 || exec.eatcycles > 0) && target.seconds() >= exec.localtime.seconds())
{
// compute how many attoseconds to execute this CPU
attoseconds_t delta = target.attoseconds() - exec.localtime.attoseconds();
if (delta < 0 && target.seconds() > exec.localtime.seconds())
{
delta += attotime.ATTOSECONDS_PER_SECOND;
}
assert(delta == (target - exec.localtime).as_attoseconds());
if (exec.attoseconds_per_cycle == 0)
{
exec.localtime = target;
}
// if we have enough for at least 1 cycle, do the math
else if (delta >= exec.attoseconds_per_cycle)
{
// compute how many cycles we want to execute
int ran = exec.cycles_running = (int)divu_64x32((UInt64)delta >> exec.divshift, (UInt32)exec.divisor);
if (machine().video().frame_update_count() % 1000 == 0)
{
LOG("device_scheduler.timeslice() - cpu '{0}': {1} ({2} cycles)\n", exec.device().tag(), delta, exec.cycles_running);
}
// if we're not suspended, actually execute
if (exec.suspend_ == 0)
{
profiler_global.g_profiler.start(exec.profiler);
// note that this global variable cycles_stolen can be modified
// via the call to cpu_execute
exec.cycles_stolen = 0;
m_executing_device = exec;
exec.icount_set(exec.cycles_running); // *exec->m_icountptr = exec->m_cycles_running;
if (!call_debugger)
{
exec.run();
}
else
{
exec.debugger_start_cpu_hook(target);
exec.run();
exec.debugger_stop_cpu_hook();
}
// adjust for any cycles we took back
/*assert(ran >= *exec->m_icountptr);*/
ran -= exec.icountptrRef.i;
/*assert(ran >= exec->m_cycles_stolen);*/
ran -= exec.cycles_stolen;
profiler_global.g_profiler.stop();
}
// account for these cycles
exec.totalcycles += (UInt64)ran;
// update the local time for this CPU
attotime deltatime;
if (ran < exec.cycles_per_second)
{
deltatime = new attotime(0, exec.attoseconds_per_cycle * ran);
}
else
{
UInt32 remainder;
int secs = (int)divu_64x32_rem((UInt64)ran, exec.cycles_per_second, out remainder);
deltatime = new attotime(secs, remainder * exec.attoseconds_per_cycle);
}
assert(deltatime >= attotime.zero);
exec.localtime += deltatime;
if (machine().video().frame_update_count() % 100 == 0)
{
LOG("device_scheduler.timeslice() - {0} ran, {1} total, time = {2}\n", ran, exec.totalcycles, exec.localtime.as_string());
}
// if the new local CPU time is less than our target, move the target up, but not before the base
if (exec.localtime < target)
{
target = attotime.Max(exec.localtime, m_basetime);
if (machine().video().frame_update_count() % 1000 == 0)
{
LOG("device_scheduler.timeslice() - (new target)\n");
}
}
}
}
}
m_executing_device = null;
// update the base time
m_basetime = target;
}
// execute timers
execute_timers();
}