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# Copyright (c) Microsoft Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import os
from typing import Tuple
import greenlet
def _greenlet_trace_callback(
event: str, args: Tuple[greenlet.greenlet, greenlet.greenlet]
) -> None:
if event in ("switch", "throw"):
origin, target = args
print(f"Transfer from {origin} to {target} with {event}")
if os.environ.get("INTERNAL_PW_GREENLET_DEBUG"):
greenlet.settrace(_greenlet_trace_callback)
class MainGreenlet(greenlet.greenlet):
def __str__(self) -> str:
return "<MainGreenlet>"
class RouteGreenlet(greenlet.greenlet):
def __str__(self) -> str:
return "<RouteGreenlet>"
class LocatorHandlerGreenlet(greenlet.greenlet):
def __str__(self) -> str:
return "<LocatorHandlerGreenlet>"
class EventGreenlet(greenlet.greenlet):
def __str__(self) -> str:
return "<EventGreenlet>"
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