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![]() Since Python 3.3, the C signal handler writes the signal number into the wakeup file descriptor and then schedules the Python call using Py_AddPendingCall(). asyncio uses the wakeup file descriptor to wake up the event loop, and relies on Py_AddPendingCall() to schedule the final callback with call_soon(). If the C signal handler is called in a thread different than the thread of the event loop, the loop is awaken but Py_AddPendingCall() was not called yet. In this case, the event loop has nothing to do and go to sleep again. Py_AddPendingCall() is called while the event loop is sleeping again and so the final callback is not scheduled immediatly. This patch changes how asyncio handles signals. Instead of relying on Py_AddPendingCall() and the wakeup file descriptor, asyncio now only relies on the wakeup file descriptor. asyncio reads signal numbers from the wakeup file descriptor to call its signal handler. |
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.. | ||
__init__.py | ||
base_events.py | ||
base_subprocess.py | ||
constants.py | ||
coroutines.py | ||
events.py | ||
futures.py | ||
locks.py | ||
log.py | ||
proactor_events.py | ||
protocols.py | ||
queues.py | ||
selector_events.py | ||
streams.py | ||
subprocess.py | ||
tasks.py | ||
test_utils.py | ||
transports.py | ||
unix_events.py | ||
windows_events.py | ||
windows_utils.py |