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# test that basic scheduling of tasks, and uasyncio.sleep_ms, does not use the heap
import micropython
# strict stackless builds can't call functions without allocating a frame on the heap
try:
f = lambda: 0
micropython.heap_lock()
f()
micropython.heap_unlock()
except RuntimeError:
print("SKIP")
raise SystemExit
try:
import uasyncio as asyncio
except ImportError:
try:
import asyncio
except ImportError:
print("SKIP")
raise SystemExit
async def task(id, n, t):
for i in range(n):
print(id, i)
await asyncio.sleep_ms(t)
async def main():
t1 = asyncio.create_task(task(1, 4, 20))
t2 = asyncio.create_task(task(2, 2, 50))
micropython.heap_lock()
print("start")
await asyncio.sleep_ms(1)
print("sleep")
await asyncio.sleep_ms(70)
print("finish")
micropython.heap_unlock()
asyncio.run(main())
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