[issue19965] Non-atomic generation of Include/Python-ast.h and Python/Python-ast.c

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

> Since the patch doesn't use O_EXCL for the temporary file, it suffers
> from the exact same race condition as the current code.

This does not make race condition. Only one thread writes .tmp files.

The problem is that other threads can read *-ast.[ch] files while they are written.

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<http://bugs.python.org/issue19965>
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