// Called from AIStateMachine::mainloop, but put here because we don't want to include llurlrequest.h there of course.
void print_statemachine_diagnostics(U64 total_clocks, U64 max_delta, AIEngine::queued_type::const_reference slowest_element)
{
AIStateMachine const& slowest_state_machine = slowest_element.statemachine();
LLURLRequest const* request = dynamic_cast<LLURLRequest const*>(&slowest_state_machine);
F64 const tfactor = 1000 / calc_clock_frequency();
std::ostringstream msg;
if (total_clocks > max_delta)
{
msg << "AIStateMachine::mainloop did run for " << (total_clocks * tfactor) << " ms. The slowest ";
}
else
{
msg << "AIStateMachine::mainloop: A ";
}
msg << "state machine ";
if (request)
{
msg << "(" << request->getResponderName() << ") ";
}
msg << "ran for " << (max_delta * tfactor) << " ms";
if (slowest_state_machine.getRuntime() > max_delta)
{
msg << " (" << (slowest_state_machine.getRuntime() * tfactor) << " ms in total now)";
}
msg << ".";
llwarns << msg.str() << llendl;
}
// Called from AIStateMachine::mainloop
void print_statemachine_diagnostics(U64 total_clocks, AIStateMachine::StateTimerBase::TimeData& slowest_timer, AIEngine::queued_type::const_reference slowest_element)
{
AIStateMachine const& slowest_state_machine = slowest_element.statemachine();
F64 const tfactor = 1000 / calc_clock_frequency();
std::ostringstream msg;
U64 max_delta = slowest_timer.GetDuration();
if (total_clocks > max_delta)
{
msg << "AIStateMachine::mainloop did run for " << (total_clocks * tfactor) << " ms. The slowest ";
}
else
{
msg << "AIStateMachine::mainloop: A ";
}
msg << "state machine " << "(" << slowest_state_machine.getName() << ") " << "ran for " << (max_delta * tfactor) << " ms";
if (slowest_state_machine.getRuntime() > max_delta)
{
msg << " (" << (slowest_state_machine.getRuntime() * tfactor) << " ms in total now)";
}
msg << ".\n";
AIStateMachine::StateTimerBase::DumpTimers(msg);
llwarns << msg.str() << llendl;
}
void AIStateMachine::yield_ms(unsigned int ms)
{
DoutEntering(dc::statemachine(mSMDebug), "AIStateMachine::yield_ms(" << ms << ") [" << (void*)this << "]");
mSleep = get_clock_count() + calc_clock_frequency() * ms / 1000;
// Sleeping is always done from the main thread.
yield(&gMainThreadEngine);
}
void AIStateMachine::StateTimer::TimeData::DumpTimer(std::ostringstream& msg, std::string prefix)
{
F64 const tfactor = 1000 / calc_clock_frequency();
msg << prefix << mName << " " << (mEnd - mStart)*tfactor << "ms" << std::endl;
prefix.push_back(' ');
std::vector<TimeData>::iterator it;
for (it = mChildren.begin(); it != mChildren.end(); ++it)
{
it->DumpTimer(msg, prefix);
}
}
// static
void AIStateMachine::setMaxCount(F32 StateMachineMaxTime)
{
llassert(is_main_thread());
Dout(dc::statemachine, "(Re)calculating AIStateMachine::sMaxCount");
sMaxCount = calc_clock_frequency() * StateMachineMaxTime / 1000;
}
// static
void AIStateMachine::dowork(void)
{
llassert(!active_statemachines.empty());
// Run one or more state machines.
U64 total_clocks = 0;
for (active_statemachines_type::iterator iter = active_statemachines.begin(); iter != active_statemachines.end(); ++iter)
{
AIStateMachine& statemachine(iter->statemachine());
if (!statemachine.mIdle)
{
U64 start = get_clock_count();
// This might call idle() and then pass the statemachine to another thread who then may call cont().
// Hence, after this isn't not sure what mIdle is, and it can change from true to false at any moment,
// if it is true after this function returns.
statemachine.multiplex(start);
U64 delta = get_clock_count() - start;
iter->add(delta);
total_clocks += delta;
if (total_clocks >= sMaxCount)
{
#ifndef LL_RELEASE_FOR_DOWNLOAD
llwarns << "AIStateMachine::mainloop did run for " << (total_clocks * 1000 / calc_clock_frequency()) << " ms." << llendl;
#endif
std::sort(active_statemachines.begin(), active_statemachines.end(), QueueElementComp());
break;
}
}
}
// Remove idle state machines from the loop.
active_statemachines_type::iterator iter = active_statemachines.begin();
while (iter != active_statemachines.end())
{
AIStateMachine& statemachine(iter->statemachine());
// Atomic test mIdle and change mActive.
bool locked = statemachine.mIdleActive.tryLock();
// If the lock failed, then another thread is in the middle of calling cont(),
// thus mIdle will end up false. So, there is no reason to block here; just
// treat mIdle as false already.
if (locked && statemachine.mIdle)
{
// Without the lock, it would be possible that another thread called cont() right here,
// changing mIdle to false again but NOT adding the statemachine to continued_statemachines,
// thinking it is in active_statemachines (and it is), while immediately below it is
// erased from active_statemachines.
statemachine.mActive = as_idle;
// Now, calling cont() is ok -- as that will cause the statemachine to be added to
// continued_statemachines, so it's fine in that case-- even necessary-- to remove it from
// active_statemachines regardless, and we can release the lock here.
statemachine.mIdleActive.unlock();
Dout(dc::statemachine, "Erasing " << (void*)&statemachine << " from active_statemachines");
iter = active_statemachines.erase(iter);
if (statemachine.mState == bs_killed)
{
Dout(dc::statemachine, "Deleting " << (void*)&statemachine);
delete &statemachine;
}
}
else
{
if (locked)
{
statemachine.mIdleActive.unlock();
}
llassert(statemachine.mActive == as_active); // It should not be possible that another thread called cont() and changed this when we are we are not idle.
llassert(statemachine.mState == bs_run || statemachine.mState == bs_initialize);
++iter;
}
}
if (active_statemachines.empty())
{
// If this was the last state machine, remove mainloop from the IdleCallbacks.
AIReadAccess<csme_type> csme_r(sContinuedStateMachinesAndMainloopEnabled, true);
if (csme_r->continued_statemachines.empty() && csme_r->mainloop_enabled)
{
Dout(dc::statemachine, "Deactivating AIStateMachine::mainloop: no active state machines left.");
AIWriteAccess<csme_type>(csme_r)->mainloop_enabled = false;
}
}
}
