Source code for pypdevs.realtime.threadingGameLoop
# Copyright 2014 Modelling, Simulation and Design Lab (MSDL) at
# McGill University and the University of Antwerp (http://msdl.cs.mcgill.ca/)
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import pypdevs.accurate_time as time
from threading import Lock
_GLLOCK = Lock()
[docs]class ThreadingGameLoop(object):
"""
Game loop subsystem for realtime simulation. Time will only progress when a *step* call is made.
"""
[docs] def __init__(self):
"""
Constructor
"""
self.next_event = float('inf')
[docs] def step(self):
"""
Perform a step in the simulation. Actual processing is done in a seperate thread.
"""
with _GLLOCK: # Thread-safety
if time.time() >= self.next_event:
self.next_event = float('inf')
getattr(self, "func")()
[docs] def wait(self, delay, func):
"""
Wait for the specified time, or faster if interrupted
:param time: time to wait
:param func: the function to call
"""
self.func = func
self.next_event = time.time() + delay
[docs] def interrupt(self):
"""
Interrupt the waiting thread
"""
self.next_event = 0