Linux, fcntl, F_SETLEASE and signals
cmg at dok.org
Mon Jul 26 18:40:17 CEST 2004
Jeff Epler <jepler at unpythonic.net> writes:
> What I don't see here is any handling of threads.
You're right. I'm ignorant of the thread<->signal interaction in
> The SIGIO handler might be called at the same time as Python code is
> running in another thread. That means the call to getPending can see a
> partially modified queue, or that the queue can be modified by a signal
> while getPending is running.
If I put a thread-safe mutex around the queue, that should be good
enough? Everything that I've seen has
read from queue
interrupt while reading via signal
read from modified queue
Is this where you were recommending Py_AddPendingCall? Add the
pending increment when no other fields are taking place?
Are C extensions only accessed by a single thread unless they
Chris Green <cmg at dok.org>
Warning: time of day goes back, taking countermeasures.
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