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Merged revisions 65654 via svnmerge from

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........
  r65654 | martin.v.loewis | 2008-08-12 16:49:50 +0200 (Tue, 12 Aug 2008) | 6 lines

  Issue #3139: Make buffer-interface thread-safe wrt. PyArg_ParseTuple,
  by denying s# to parse objects that have a releasebuffer procedure,
  and introducing s*.

  More module might need to get converted to use s*.
........
This commit is contained in:
Martin v. Löwis 2008-08-13 15:53:07 +00:00
parent 688356f59f
commit 423be95dcf
32 changed files with 721 additions and 390 deletions
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42
Objects/abstract.c
View file

@ -349,16 +349,6 @@ PyObject_GetBuffer(PyObject *obj, Py_buffer *view, int flags)
return (*(obj->ob_type->tp_as_buffer->bf_getbuffer))(obj, view, flags);
}
void
PyObject_ReleaseBuffer(PyObject *obj, Py_buffer *view)
{
if (obj->ob_type->tp_as_buffer != NULL &&
obj->ob_type->tp_as_buffer->bf_releasebuffer != NULL) {
(*(obj->ob_type->tp_as_buffer->bf_releasebuffer))(obj, view);
}
}
static int
_IsFortranContiguous(Py_buffer *view)
{
@ -590,15 +580,15 @@ int PyObject_CopyData(PyObject *dest, PyObject *src)
if (PyObject_GetBuffer(dest, &view_dest, PyBUF_FULL) != 0) return -1;
if (PyObject_GetBuffer(src, &view_src, PyBUF_FULL_RO) != 0) {
PyObject_ReleaseBuffer(dest, &view_dest);
PyBuffer_Release(&view_dest);
return -1;
}
if (view_dest.len < view_src.len) {
PyErr_SetString(PyExc_BufferError,
"destination is too small to receive data from source");
PyObject_ReleaseBuffer(dest, &view_dest);
PyObject_ReleaseBuffer(src, &view_src);
PyBuffer_Release(&view_dest);
PyBuffer_Release(&view_src);
return -1;
}
@ -608,8 +598,8 @@ int PyObject_CopyData(PyObject *dest, PyObject *src)
PyBuffer_IsContiguous(&view_src, 'F'))) {
/* simplest copy is all that is needed */
memcpy(view_dest.buf, view_src.buf, view_src.len);
PyObject_ReleaseBuffer(dest, &view_dest);
PyObject_ReleaseBuffer(src, &view_src);
PyBuffer_Release(&view_dest);
PyBuffer_Release(&view_src);
return 0;
}
@ -619,8 +609,8 @@ int PyObject_CopyData(PyObject *dest, PyObject *src)
indices = (Py_ssize_t *)PyMem_Malloc(sizeof(Py_ssize_t)*view_src.ndim);
if (indices == NULL) {
PyErr_NoMemory();
PyObject_ReleaseBuffer(dest, &view_dest);
PyObject_ReleaseBuffer(src, &view_src);
PyBuffer_Release(&view_dest);
PyBuffer_Release(&view_src);
return -1;
}
for (k=0; k<view_src.ndim;k++) {
@ -638,8 +628,8 @@ int PyObject_CopyData(PyObject *dest, PyObject *src)
memcpy(dptr, sptr, view_src.itemsize);
}
PyMem_Free(indices);
PyObject_ReleaseBuffer(dest, &view_dest);
PyObject_ReleaseBuffer(src, &view_src);
PyBuffer_Release(&view_dest);
PyBuffer_Release(&view_src);
return 0;
}
@ -668,7 +658,7 @@ PyBuffer_FillContiguousStrides(int nd, Py_ssize_t *shape,
}
int
PyBuffer_FillInfo(Py_buffer *view, void *buf, Py_ssize_t len,
PyBuffer_FillInfo(Py_buffer *view, PyObject *obj, void *buf, Py_ssize_t len,
int readonly, int flags)
{
if (view == NULL) return 0;
@ -679,6 +669,7 @@ PyBuffer_FillInfo(Py_buffer *view, void *buf, Py_ssize_t len,
return -1;
}
view->obj = obj;
view->buf = buf;
view->len = len;
view->readonly = readonly;
@ -698,6 +689,17 @@ PyBuffer_FillInfo(Py_buffer *view, void *buf, Py_ssize_t len,
return 0;
}
void
PyBuffer_Release(Py_buffer *view)
{
PyObject *obj = view->obj;
if (!obj || !Py_TYPE(obj)->tp_as_buffer || !Py_TYPE(obj)->tp_as_buffer->bf_releasebuffer)
/* Unmanaged buffer */
return;
Py_TYPE(obj)->tp_as_buffer->bf_releasebuffer(obj, view);
}
PyObject *
PyObject_Format(PyObject *obj, PyObject *format_spec)
{