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This commit is contained in:
Andrew M. Kuchling 2008-08-27 00:45:02 +00:00
parent d207e230e1
commit c9b41106e8
1 changed files with 6 additions and 5 deletions
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Doc/whatsnew/2.6.rst
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@ -1053,8 +1053,7 @@ packages such as NumPy, which can expose the internal representation
of arrays so that callers can write data directly into an array instead
of going through a slower API. This PEP updates the buffer protocol in light of experience
from NumPy development, adding a number of new features
such as indicating the shape of an array,
locking memory .
such as indicating the shape of an array or locking a memory region.
The most important new C API function is
``PyObject_GetBuffer(PyObject *obj, Py_buffer *view, int flags)``, which
@ -1063,10 +1062,11 @@ takes an object and a set of flags, and fills in the
about the object's memory representation. Objects
can use this operation to lock memory in place
while an external caller could be modifying the contents,
so there's a corresponding
``PyBuffer_Release(Py_buffer *view)`` to
so there's a corresponding ``PyBuffer_Release(Py_buffer *view)`` to
indicate that the external caller is done.
.. XXX PyObject_GetBuffer not documented in c-api
The **flags** argument to :cfunc:`PyObject_GetBuffer` specifies
constraints upon the memory returned. Some examples are:
@ -1078,7 +1078,8 @@ constraints upon the memory returned. Some examples are:
requests a C-contiguous (last dimension varies the fastest) or
Fortran-contiguous (first dimension varies the fastest) layout.
.. XXX this feature is not in 2.6 docs yet
Two new argument codes for :cfunc:`PyArg_ParseTuple`,
``s*`` and ``z*``, return locked buffer objects for a parameter.
.. seealso::