void Readable::resume() {
auto& state = _readableState;
if (!state.flowing) {
state.flowing = true;
if (!state.resumeScheduled) {
state.resumeScheduled = true;
process.nextTick([this]() {
resume_(_readableState);
});
}
}
}
void
nest::SimulationManager::simulate( Time const& t )
{
assert( kernel().is_initialized() );
t_real_ = 0;
t_slice_begin_ = timeval();
t_slice_end_ = timeval();
if ( t == Time::ms( 0.0 ) )
return;
if ( t < Time::step( 1 ) )
{
LOG( M_ERROR,
"SimulationManager::simulate",
String::compose( "Simulation time must be >= %1 ms (one time step).",
Time::get_resolution().get_ms() ) );
throw KernelException();
}
if ( t.is_finite() )
{
Time time1 = clock_ + t;
if ( !time1.is_finite() )
{
std::string msg = String::compose(
"A clock overflow will occur after %1 of %2 ms. Please reset network "
"clock first!",
( Time::max() - clock_ ).get_ms(),
t.get_ms() );
LOG( M_ERROR, "SimulationManager::simulate", msg );
throw KernelException();
}
}
else
{
std::string msg = String::compose(
"The requested simulation time exceeds the largest time NEST can handle "
"(T_max = %1 ms). Please use a shorter time!",
Time::max().get_ms() );
LOG( M_ERROR, "SimulationManager::simulate", msg );
throw KernelException();
}
to_do_ += t.get_steps();
to_do_total_ = to_do_;
const size_t num_active_nodes = prepare_simulation_();
// from_step_ is not touched here. If we are at the beginning
// of a simulation, it has been reset properly elsewhere. If
// a simulation was ended and is now continued, from_step_ will
// have the proper value. to_step_ is set as in advance_time().
delay end_sim = from_step_ + to_do_;
if ( kernel().connection_manager.get_min_delay() < end_sim )
to_step_ =
kernel()
.connection_manager.get_min_delay(); // update to end of time slice
else
to_step_ = end_sim; // update to end of simulation time
// Warn about possible inconsistencies, see #504.
// This test cannot come any earlier, because we first need to compute
// min_delay_
// above.
if ( t.get_steps() % kernel().connection_manager.get_min_delay() != 0 )
LOG( M_WARNING,
"SimulationManager::simulate",
"The requested simulation time is not an integer multiple of the minimal "
"delay in the network. This may result in inconsistent results under the "
"following conditions: (i) A network contains more than one source of "
"randomness, e.g., two different poisson_generators, and (ii) Simulate "
"is called repeatedly with simulation times that are not multiples of "
"the minimal delay." );
resume_( num_active_nodes );
finalize_simulation_();
}