F5/unison
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

implement a non-realtime version of RunOneEvent for realtime simulator and allow Run, Stop, Run

Browse Source
This commit is contained in:
Craig Dowell
2008-10-14 23:13:12 -07:00
parent 8b6dc98d14
commit 2ca2b4e6bf
1 changed files with 43 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
src/simulator/realtime-simulator-impl.cc
View File

@@ -432,9 +432,11 @@ void
RealtimeSimulatorImpl::Run (void)
{
NS_LOG_FUNCTION_NOARGS ();
NS_ASSERT_MSG (m_running == false,
"RealtimeSimulatorImpl::Run(): Simulator already running");
m_running = true;
NS_ASSERT_MSG (m_currentTs == 0,
"RealtimeSimulatorImpl::Run(): The beginning of time is not zero");
m_synchronizer->SetOrigin (m_currentTs);
for (;;)
@@ -501,11 +503,48 @@ RealtimeSimulatorImpl::Realtime (void) const
return m_synchronizer->Realtime ();
}
//
// This will run the first event on the queue without considering any realtime
// synchronization. It's mainly implemented to allow simulations requiring
// the multithreaded ScheduleRealtimeNow() functions the possibility of driving
// the simulation from their own event loop.
//
// It is expected that if there are any realtime requirements, the responsibility
// for synchronizing with real time in an external event loop will be picked up
// by that loop. For example, they may call Simulator::Next() to find the
// execution time of the next event and wait for that time somehow -- then call
// RunOneEvent to fire the event.
//
void
RealtimeSimulatorImpl::RunOneEvent (void)
{
NS_LOG_FUNCTION_NOARGS ();
NS_FATAL_ERROR ("DefaultSimulatorImpl::RunOneEvent(): Not allowed in realtime simulations");
NS_ASSERT_MSG (m_running == false,
"RealtimeSimulatorImpl::RunOneEvent(): An internal simulator event loop is running");
EventId next;
EventImpl *event = 0;
//
// Run this in a critical section in case there's another thread around that
// may be inserting things onto the event list.
//
{
CriticalSection cs (m_mutex);
next = m_events->RemoveNext ();
NS_ASSERT (next.GetTs () >= m_currentTs);
--m_unscheduledEvents;
NS_LOG_LOGIC ("handle " << next.GetTs ());
m_currentTs = next.GetTs ();
m_currentUid = next.GetUid ();
event = next.PeekEventImpl ();
}
event->Invoke ();
}
void
@@ -530,6 +569,7 @@ RealtimeSimulatorImpl::Stop (Time const &time)
NS_ASSERT (tAbsolute.IsPositive ());
NS_ASSERT (tAbsolute >= TimeStep (m_currentTs));
m_stopAt = tAbsolute.GetTimeStep ();
//
// For the realtime case, we need a real event sitting out at the end of time
// to keep the simulator running (sleeping) while there are no other events