Teile 10 bis 12.
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44
teil12/race_condition_asyncio.py
Normal file
44
teil12/race_condition_asyncio.py
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import asyncio
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import random
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import time
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gesamtwert = 0
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message = ''
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async def calculate_sum(lock, thread_nummer):
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global gesamtwert
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global message
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for i in range(100 + thread_nummer):
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async with lock:
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zwischen = gesamtwert
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#Zufällige Wartezeit zwischen 0,1s und 0,5s
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wartezeit = random.randint(1,5+thread_nummer)
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time.sleep(0.1 * wartezeit)
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zwischen += 1
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async with lock:
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gesamtwert = zwischen
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message = f'Thread {thread_nummer} fertig'
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print(f'Thread + {thread_nummer} abgearbeitet.')
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async def main():
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#async Lock erzeugen
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lock = asyncio.Lock()
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# drei Threads starten, um die Summe der Zahlen zu berechnen
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threads = [asyncio.create_task(calculate_sum(lock, _+1)) for _ in range(3)]
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#Warten auf alle Threads
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await asyncio.gather(*threads)
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print(f'gesamtwert={gesamtwert}')
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print(f'message={message}')
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if __name__ == '__main__':
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asyncio.run(main())
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