33 lines
1.3 KiB
Python
33 lines
1.3 KiB
Python
import structio
|
|
|
|
|
|
async def main(n):
|
|
print(f"[main] Starting sliding timer with timeout {n}")
|
|
i = structio.clock()
|
|
with structio.skip_after(1.5) as scope:
|
|
while n:
|
|
# This looks weird, but it allows us to
|
|
# handle floating point values (basically
|
|
# if n equals say, 7.5, then this loop will
|
|
# sleep 7.5 seconds instead of 8), which would
|
|
# otherwise cause this loop to run forever and
|
|
# the deadline to shift indefinitely into the
|
|
# future (because n would never reach zero, getting
|
|
# immediately negative instead)
|
|
shift = min(n, 1)
|
|
print(f"[main] Waiting {shift:.2f} second{'' if shift == 1 else 's'}")
|
|
await structio.sleep(shift)
|
|
print(f"[main] Shifting deadline")
|
|
# Updating the scope's timeout causes
|
|
# its deadline to shift accordingly!
|
|
scope.timeout += shift
|
|
n -= shift
|
|
print("[main] Deadline shifting complete")
|
|
# Should take about n seconds to run, because we shift
|
|
# the deadline of the cancellation n times and wait at most
|
|
# 1 second after every shift
|
|
print(f"[main] Exited in {structio.clock() - i:.2f} seconds")
|
|
|
|
|
|
structio.run(main, 7.5)
|