Simulation_Thread.py

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#!/usr/bin/env python3
""" @brief  Simulation thread. """
 
#============================================================================#
# EVOLIFE  http://evolife.telecom-paris.fr             Jean-Louis Dessalles  #
# Telecom Paris  2022-04-11                                www.dessalles.fr  #
# -------------------------------------------------------------------------- #
# License:  Creative Commons BY-NC-SA                                        #
#============================================================================#
# Documentation: https://evolife.telecom-paris.fr/Classes                    #
#============================================================================#
 
 
 
 
 
 
from sys import excepthook, exc_info
from threading import Thread
from time import sleep
 
 
 
 
class Simulation(Thread):
    """ Thread triggered by the "Step" and "Run" buttons
        of the Evolife window system
    """
    def __init__(self, OneStep, funcmode, ReturnFromThread):
        Thread.__init__(self)
        self.Back = ReturnFromThread
        self.Continuous = funcmode
        self.Running = False
        self.BusyDisplay = False   # indicates that display needs time to update
        self.OneStep = OneStep    # function that runs one simulation step
 
    def stop(self):
        """ stops the thread """
        if self.Running:
            self.Running = False
        if self.BusyDisplay:
            while self.Back('Busy?'):
                sleep(0.1)
            # print "stopping the process"
            self.join()
 
    def run(self):
        """ launched by start() """
        self.Running = True
        while self.Running:
            try:
                ReturnFromDisplay = self.Back(self.OneStep())
                if ReturnFromDisplay < 0:
                    # We have to stop
                    self.running = False
                    break
                elif ReturnFromDisplay > 0:
                    # Display is jammed - We have to wait
                    self.BusyDisplay = True
                    while self.Back('Busy?'):
                        sleep(0.1)
                    self.BusyDisplay = False
            except:
                    self.running = False
                    excepthook(exc_info()[0],exc_info()[1],exc_info()[2])
                    break
            if not self.Continuous:
                break
 
 
 
 
 
if __name__ == "__main__":
    print(__doc__ + '\n')
    print(Simulation.__doc__ + '\n')
    raw_input('[Return]')
 
 
__author__ = 'Dessalles'