mirror of https://github.com/nocturn9x/giambio.git
51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
"""
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Task synchronization primitives
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Copyright (C) 2020 nocturn9x
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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from giambio.traps import event_wait, event_set
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from giambio.exceptions import GiambioError
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class Event:
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"""
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A class designed similarly to threading.Event
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"""
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def __init__(self):
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"""
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Object constructor
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"""
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self.set = False
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self.waiters = set()
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async def trigger(self):
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"""
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Sets the event, waking up all tasks that called
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pause() on it
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"""
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if self.set:
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raise GiambioError("The event has already been set")
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await event_set(self)
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async def wait(self):
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"""
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Waits until the event is set
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"""
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await event_wait(self)
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