[Python-Dev] Buffer interface and multiple threads

[Jack Jansen]

Hmm, something that just struck me: the buffer _interface_ (i.e. the C 
routines, not the buffer object stuff) is potentially thread-unsafe.

In the "old world", where "s#" only worked on string objects, you
could be sure that the C pointer returned remained valid as long as
you had a reference to the python string object in hand, as strings
are immutable.

In the "new world", where "s#" also works on, say, array objects, this 
doesn't hold anymore. So, potentially, while one thread is in a
write() system call writing the contents of the array to a file
another thread could come in and change the data.

Is this a problem?
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