53 lines
1.4 KiB
Python
53 lines
1.4 KiB
Python
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import asyncio
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import sys
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from asyncio import sleep as asyncio_sleep
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from time import monotonic, perf_counter
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WINDOWS = sys.platform == "win32"
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if WINDOWS:
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time = perf_counter
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else:
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time = monotonic
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if WINDOWS:
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# sleep on windows as a resolution of 15ms
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# Python3.11 is somewhat better, but this home-grown version beats it
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# Deduced from practical experiments
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from textual._win_sleep import sleep as win_sleep
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async def sleep(secs: float) -> None:
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"""Sleep for a given number of seconds.
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Args:
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secs: Number of seconds to sleep for.
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"""
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await asyncio.create_task(win_sleep(secs))
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else:
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async def sleep(secs: float) -> None:
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"""Sleep for a given number of seconds.
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Args:
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secs: Number of seconds to sleep for.
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"""
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# From practical experiments, asyncio.sleep sleeps for at least half a millisecond too much
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# Presumably there is overhead asyncio itself which accounts for this
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# We will reduce the sleep to compensate, and also don't sleep at all for less than half a millisecond
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sleep_for = secs - 0.0005
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if sleep_for > 0:
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await asyncio_sleep(sleep_for)
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get_time = time
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"""Get the current wall clock (monotonic) time.
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Returns:
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The value (in fractional seconds) of a monotonic clock,
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i.e. a clock that cannot go backwards.
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"""
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