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# Test Event class
try:
import asyncio
except ImportError:
print("SKIP")
raise SystemExit
import micropython
try:
micropython.schedule
except AttributeError:
print("SKIP")
raise SystemExit
try:
# Unix port can't select/poll on user-defined types.
import select
poller = select.poll()
poller.register(asyncio.ThreadSafeFlag())
except TypeError:
print("SKIP")
raise SystemExit
async def task(id, flag):
print("task", id)
await flag.wait()
print("task", id, "done")
def set_from_schedule(flag):
print("schedule")
flag.set()
print("schedule done")
async def main():
flag = asyncio.ThreadSafeFlag()
# Set the flag from within the loop.
t = asyncio.create_task(task(1, flag))
print("yield")
await asyncio.sleep(0)
print("set event")
flag.set()
print("yield")
await asyncio.sleep(0)
print("wait task")
await t
# Set the flag from scheduler context.
print("----")
t = asyncio.create_task(task(2, flag))
print("yield")
await asyncio.sleep(0)
print("set event")
micropython.schedule(set_from_schedule, flag)
print("yield")
await asyncio.sleep(0)
print("wait task")
await t
# Flag already set.
print("----")
print("set event")
flag.set()
t = asyncio.create_task(task(3, flag))
print("yield")
await asyncio.sleep(0)
print("wait task")
await t
# Flag set, cleared, and set again.
print("----")
print("set event")
flag.set()
print("yield")
await asyncio.sleep(0)
print("clear event")
flag.clear()
print("yield")
await asyncio.sleep(0)
t = asyncio.create_task(task(4, flag))
print("yield")
await asyncio.sleep(0)
print("set event")
flag.set()
print("yield")
await asyncio.sleep(0)
print("wait task")
await t
asyncio.run(main())
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