Author: Armin Rigo <[email protected]> Branch: Changeset: r3006:3d609382a4b8 Date: 2017-08-31 17:44 +0200 http://bitbucket.org/cffi/cffi/changeset/3d609382a4b8/
Log: Write down an explicit example of what not to do diff --git a/doc/source/ref.rst b/doc/source/ref.rst --- a/doc/source/ref.rst +++ b/doc/source/ref.rst @@ -51,6 +51,9 @@ data can be used as long as this object is kept alive, but must not be used for a longer time. Be careful about that when copying the pointer to the memory somewhere else, e.g. into another structure. +Also, this means that a line like ``x = ffi.new(...)[0]`` is *always +wrong:* the newly allocated object goes out of scope instantly, and so +is freed immediately, and ``x`` is garbage. The returned memory is initially cleared (filled with zeroes), before the optional initializer is applied. For performance, see _______________________________________________ pypy-commit mailing list [email protected] https://mail.python.org/mailman/listinfo/pypy-commit
