29 lines
846 B
Python
29 lines
846 B
Python
from uasyncio import core
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class Lock:
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def __init__(self):
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self.locked = False
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self.wlist = []
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def release(self):
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assert self.locked
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self.locked = False
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if self.wlist:
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#print(self.wlist)
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coro = self.wlist.pop(0)
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core.get_event_loop().call_soon(coro)
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def acquire(self):
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# As release() is not coro, assume we just released and going to acquire again
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# so, yield first to let someone else to acquire it first
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yield
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#print("acquire:", self.locked)
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while 1:
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if not self.locked:
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self.locked = True
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return True
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#print("putting", core.get_event_loop().cur_task, "on waiting list")
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self.wlist.append(core.get_event_loop().cur_task)
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yield False
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