Is Python/C api thread safety enough?

[Greg Ewing]

Donnie Leen wrote:

> If the long-running function comes from third-party library
> such as zlib.compress(), we don't know wether the function is
> safety for python thread, it may cause error, how could we
> avoid this if we have to use it?

A third-party library that knows nothing about Python
is unlikely to be making any Python/C API calls, so
you should be safe in that case.

If you pass a callback function to the library, and
your callback makes any Python/C API calls, it will
need to make sure it holds the GIL around those calls.

-- 
Greg Ewing, Computer Science Dept,
University of Canterbury,	
Christchurch, New Zealand
http://www.cosc.canterbury.ac.nz/~greg