mirror of https://gitlab.com/bashrc2/epicyon
99 lines
2.7 KiB
Python
99 lines
2.7 KiB
Python
__filename__ = "threads.py"
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__author__ = "Bob Mottram"
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__license__ = "AGPL3+"
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__version__ = "1.0.0"
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__maintainer__ = "Bob Mottram"
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__email__ = "bob@freedombone.net"
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__status__ = "Production"
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import threading
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import sys
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import trace
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import time
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class threadWithTrace(threading.Thread):
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def __init__(self, *args, **keywords):
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tries=0
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while tries<3:
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try:
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self._args, self._keywords = args, keywords
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threading.Thread.__init__(self, *self._args, **self._keywords)
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self.killed = False
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break
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except Exception as e:
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print('ERROR: threads.py/__init__ failed - '+str(e))
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time.sleep(1)
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tries+=1
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def start(self):
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tries=0
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while tries<3:
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try:
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self.__run_backup = self.run
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self.run = self.__run
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threading.Thread.start(self)
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break
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except Exception as e:
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print('ERROR: threads.py/start failed - '+str(e))
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time.sleep(1)
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tries+=1
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def __run(self):
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tries=0
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while tries<3:
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try:
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sys.settrace(self.globaltrace)
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self.__run_backup()
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self.run = self.__run_backup
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break
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except Exception as e:
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print('ERROR: threads.py/__run failed - '+str(e))
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time.sleep(1)
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tries+=1
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def globaltrace(self, frame, event, arg):
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if event == 'call':
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return self.localtrace
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else:
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return None
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def localtrace(self, frame, event, arg):
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if self.killed:
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if event == 'line':
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raise SystemExit()
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return self.localtrace
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def kill(self):
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self.killed = True
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def clone(self,fn):
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return threadWithTrace(target=fn, \
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args=self._args, \
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daemon=True)
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def removeDormantThreads(threadsList: [],debug: bool) -> None:
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"""Removes threads whose execution has completed
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"""
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if len(threadsList)==0:
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return
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dormantThreads=[]
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# which threads are dormant?
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noOfActiveThreads=0
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for th in threadsList:
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if not th.is_alive():
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dormantThreads.append(th)
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else:
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noOfActiveThreads+=1
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if debug:
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print('DEBUG: '+str(noOfActiveThreads) + ' active threads out of '+str(len(threadsList)))
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# remove the dormant threads
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dormantCtr=0
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for th in dormantThreads:
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if debug:
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print('DEBUG: Removing dormant thread '+str(dormantCtr))
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dormantCtr+=1
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threadsList.remove(th)
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