53 lines
1.7 KiB
Python
53 lines
1.7 KiB
Python
import structio
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import random
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async def waiter(ch: structio.ChannelReader):
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print("[waiter] Waiter is alive!")
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while True:
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print("[waiter] Awaiting events")
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try:
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evt: structio.Event = await ch.receive()
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except structio.ResourceClosed:
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break
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print("[waiter] Received event, waiting to be triggered")
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t = structio.clock()
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await evt.wait()
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print(f"[waiter] Event triggered after {structio.clock() - t:.2f} seconds")
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print("[waiter] Done!")
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async def sender(ch: structio.Channel, n: int):
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print("[sender] Sender is alive!")
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async with ch:
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# Channel is automatically closed when exiting
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# the async with block
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for _ in range(n):
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print("[sender] Sending event")
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ev = structio.Event()
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await ch.send(ev)
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t = random.random()
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print(f"[sender] Sent event, sleeping {t:.2f} seconds")
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await structio.sleep(t)
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print("[sender] Setting the event")
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ev.set()
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print("[sender] Done!")
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async def main(n: int):
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print("[main] Parent is alive")
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channel = structio.MemoryChannel(1)
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async with structio.create_pool() as pool:
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# Each end of the channel can be used independently,
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# and closing one does not also close the other (which
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# is why we pass the full channel object to our sender
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# so it can close both ends and cause the reader to catch
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# the closing exception and exit cleanly)
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pool.spawn(waiter, channel.reader)
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pool.spawn(sender, channel, n)
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print("[main] Children spawned")
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print("[main] Done!")
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structio.run(main, 3)
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