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cobject.rst.txt
.. highlightlang:: c .. _cobjects: CObjects -------- .. index:: object: CObject .. warning:: The CObject API is deprecated as of Python 2.7. Please switch to the new :ref:`capsules` API. .. c:type:: PyCObject This subtype of :c:type:`PyObject` represents an opaque value, useful for C extension modules who need to pass an opaque value (as a :c:type:`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. .. c:function:: int PyCObject_Check(PyObject *p) Return true if its argument is a :c:type:`PyCObject`. .. c:function:: PyObject* PyCObject_FromVoidPtr(void* cobj, void (*destr)(void *)) Create a :c:type:`PyCObject` from the ``void *`` *cobj*. The *destr* function will be called when the object is reclaimed, unless it is *NULL*. .. c:function:: PyObject* PyCObject_FromVoidPtrAndDesc(void* cobj, void* desc, void (*destr)(void *, void *)) Create a :c:type:`PyCObject` from the :c:type:`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. .. c:function:: void* PyCObject_AsVoidPtr(PyObject* self) Return the object :c:type:`void \*` that the :c:type:`PyCObject` *self* was created with. .. c:function:: void* PyCObject_GetDesc(PyObject* self) Return the description :c:type:`void \*` that the :c:type:`PyCObject` *self* was created with. .. c:function:: int PyCObject_SetVoidPtr(PyObject* self, void* cobj) Set the void pointer inside *self* to *cobj*. The :c:type:`PyCObject` must not have an associated destructor. Return true on success, false on failure.