Alexander Belopolsky <[email protected]> added the comment:
Another "+1" on the patch if it is needed. Posix module consistently releases
the GIL while making system calls and this is a good idea independent of this
particular issue.
Looking at the patch made me wonder whether existing
Py_BEGIN_ALLOW_THREADS
ep = readdir(dirp);
Py_END_ALLOW_THREADS
is safe. Apparently it is safe as was explained in
http://mail.python.org/pipermail/python-dev/2006-April/063808.html
because "The pointer returned by readdir() points to data which may be
overwritten by another call to readdir() on the same directory stream. This
data is not overwritten by another call to readdir() on a different directory
stream."
It may be appropriate to add a comment near the readdir() explaining why it is
safe in this context. Clearly I am not the only one who found this non-obvious.
----------
nosy: +Alexander.Belopolsky
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<http://bugs.python.org/issue7736>
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