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bpo-33176: Add a toreadonly() method to memoryviews. (GH-6466)

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Antoine Pitrou 2018-04-14 19:49:21 +02:00 • committed by GitHub
parent b1dc07509f
commit 480ab05d5f
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5 changed files with 72 additions and 15 deletions
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19
Objects/memoryobject.c
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@ -1398,6 +1398,20 @@ memory_cast(PyMemoryViewObject *self, PyObject *args, PyObject *kwds)
return NULL;
}
static PyObject *
memory_toreadonly(PyMemoryViewObject *self, PyObject *noargs)
{
CHECK_RELEASED(self);
/* Even if self is already readonly, we still need to create a new
* object for .release() to work correctly.
*/
self = (PyMemoryViewObject *) mbuf_add_view(self->mbuf, &self->view);
if (self != NULL) {
self->view.readonly = 1;
};
return (PyObject *) self;
}
/**************************************************************************/
/* getbuffer */
@ -3061,6 +3075,10 @@ PyDoc_STRVAR(memory_cast_doc,
"cast($self, /, format, *, shape)\n--\n\
\n\
Cast a memoryview to a new format or shape.");
PyDoc_STRVAR(memory_toreadonly_doc,
"toreadonly($self, /)\n--\n\
\n\
Return a readonly version of the memoryview.");
static PyMethodDef memory_methods[] = {
{"release", (PyCFunction)memory_release, METH_NOARGS, memory_release_doc},
@ -3068,6 +3086,7 @@ static PyMethodDef memory_methods[] = {
{"hex", (PyCFunction)memory_hex, METH_NOARGS, memory_hex_doc},
{"tolist", (PyCFunction)memory_tolist, METH_NOARGS, memory_tolist_doc},
{"cast", (PyCFunction)memory_cast, METH_VARARGS|METH_KEYWORDS, memory_cast_doc},
{"toreadonly", (PyCFunction)memory_toreadonly, METH_NOARGS, memory_toreadonly_doc},
{"__enter__", memory_enter, METH_NOARGS, NULL},
{"__exit__", memory_exit, METH_VARARGS, NULL},
{NULL, NULL}