mirror of https://github.com/python/cpython
57 lines
1.8 KiB
ReStructuredText
57 lines
1.8 KiB
ReStructuredText
.. highlightlang:: c
|
|
|
|
.. _cobjects:
|
|
|
|
CObjects
|
|
--------
|
|
|
|
.. index:: object: CObject
|
|
|
|
Refer to :ref:`using-cobjects` for more information on using these objects.
|
|
|
|
|
|
.. ctype:: PyCObject
|
|
|
|
This subtype of :ctype:`PyObject` represents an opaque value, useful for C
|
|
extension modules who need to pass an opaque value (as a :ctype:`void\*`
|
|
pointer) through Python code to other C code. It is often used to make a C
|
|
function pointer defined in one module available to other modules, so the
|
|
regular import mechanism can be used to access C APIs defined in dynamically
|
|
loaded modules.
|
|
|
|
|
|
.. cfunction:: int PyCObject_Check(PyObject *p)
|
|
|
|
Return true if its argument is a :ctype:`PyCObject`.
|
|
|
|
|
|
.. cfunction:: PyObject* PyCObject_FromVoidPtr(void* cobj, void (*destr)(void *))
|
|
|
|
Create a :ctype:`PyCObject` from the ``void *`` *cobj*. The *destr* function
|
|
will be called when the object is reclaimed, unless it is *NULL*.
|
|
|
|
|
|
.. cfunction:: PyObject* PyCObject_FromVoidPtrAndDesc(void* cobj, void* desc, void (*destr)(void *, void *))
|
|
|
|
Create a :ctype:`PyCObject` from the :ctype:`void \*` *cobj*. The *destr*
|
|
function will be called when the object is reclaimed. The *desc* argument can
|
|
be used to pass extra callback data for the destructor function.
|
|
|
|
|
|
.. cfunction:: void* PyCObject_AsVoidPtr(PyObject* self)
|
|
|
|
Return the object :ctype:`void \*` that the :ctype:`PyCObject` *self* was
|
|
created with.
|
|
|
|
|
|
.. cfunction:: void* PyCObject_GetDesc(PyObject* self)
|
|
|
|
Return the description :ctype:`void \*` that the :ctype:`PyCObject` *self* was
|
|
created with.
|
|
|
|
|
|
.. cfunction:: int PyCObject_SetVoidPtr(PyObject* self, void* cobj)
|
|
|
|
Set the void pointer inside *self* to *cobj*. The :ctype:`PyCObject` must not
|
|
have an associated destructor. Return true on success, false on failure.
|