def _makeWaiters(arglist):
waiters = []
ids = set()
cosim = None
for arg in arglist:
if isinstance(arg, GeneratorType):
waiters.append(_inferWaiter(arg))
elif isinstance(arg, _Instantiator):
waiters.append(arg.waiter)
elif isinstance(arg, Cosimulation):
if cosim is not None:
raise SimulationError(_error.MultipleCosim)
cosim = arg
waiters.append(_SignalTupleWaiter(cosim._waiter()))
elif isinstance(arg, _Waiter):
waiters.append(arg)
elif arg == True:
pass
else:
raise SimulationError(_error.ArgType, str(type(arg)))
if id(arg) in ids:
raise SimulationError(_error.DuplicatedArg)
ids.add(id(arg))
# add waiters for shadow signals
for sig in _signals:
if hasattr(sig, '_waiter'):
waiters.append(sig._waiter)
return waiters, cosim
def __init__(self, *args):
""" Construct a simulation object.
*args -- list of arguments. Each argument is a generator or
a nested sequence of generators.
"""
_simulator._time = 0
arglist = _flatten(*args)
self._waiters, self._cosims = _makeWaiters(arglist)
if Simulation._no_of_instances > 0:
raise SimulationError(_error.MultipleSim)
Simulation._no_of_instances += 1
self._finished = False
del _futureEvents[:]
del _siglist[:]