/* -*- Mode: C; c-basic-offset: 4 -*- * pygtk- Python bindings for the GTK toolkit. * Copyright (C) 1998-2003 James Henstridge * * pygpointer.c: wrapper for GPointer * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 * USA */ #ifdef HAVE_CONFIG_H # include #endif #include #include "pygobject-private.h" #include "pygpointer.h" #include "pygi-external.h" GQuark pygpointer_class_key; PYGLIB_DEFINE_TYPE("gobject.GPointer", PyGPointer_Type, PyGPointer); static void pyg_pointer_dealloc(PyGPointer *self) { Py_TYPE(self)->tp_free((PyObject *)self); } static int pyg_pointer_compare(PyGPointer *self, PyGPointer *v) { if (self->pointer == v->pointer) return 0; if (self->pointer > v->pointer) return -1; return 1; } static long pyg_pointer_hash(PyGPointer *self) { return (long)self->pointer; } static PyObject * pyg_pointer_repr(PyGPointer *self) { gchar buf[128]; g_snprintf(buf, sizeof(buf), "<%s at 0x%lx>", g_type_name(self->gtype), (long)self->pointer); return _PyUnicode_FromString(buf); } static int pyg_pointer_init(PyGPointer *self, PyObject *args, PyObject *kwargs) { gchar buf[512]; if (!PyArg_ParseTuple(args, ":GPointer.__init__")) return -1; self->pointer = NULL; self->gtype = 0; g_snprintf(buf, sizeof(buf), "%s can not be constructed", Py_TYPE(self)->tp_name); PyErr_SetString(PyExc_NotImplementedError, buf); return -1; } static void pyg_pointer_free(PyObject *op) { PyObject_FREE(op); } /** * pyg_register_pointer: * @dict: the module dictionary to store the wrapper class. * @class_name: the Python name for the wrapper class. * @pointer_type: the GType of the pointer type being wrapped. * @type: the wrapper class. * * Registers a wrapper for a pointer type. The wrapper class will be * a subclass of gobject.GPointer, and a reference to the wrapper * class will be stored in the provided module dictionary. */ void pyg_register_pointer(PyObject *dict, const gchar *class_name, GType pointer_type, PyTypeObject *type) { PyObject *o; g_return_if_fail(dict != NULL); g_return_if_fail(class_name != NULL); g_return_if_fail(pointer_type != 0); if (!type->tp_dealloc) type->tp_dealloc = (destructor)pyg_pointer_dealloc; Py_TYPE(type) = &PyType_Type; type->tp_base = &PyGPointer_Type; if (PyType_Ready(type) < 0) { g_warning("could not get type `%s' ready", type->tp_name); return; } PyDict_SetItemString(type->tp_dict, "__gtype__", o=pyg_type_wrapper_new(pointer_type)); Py_DECREF(o); g_type_set_qdata(pointer_type, pygpointer_class_key, type); PyDict_SetItemString(dict, (char *)class_name, (PyObject *)type); } /** * pyg_pointer_new: * @pointer_type: the GType of the pointer value. * @pointer: the pointer value. * * Creates a wrapper for a pointer value. Since G_TYPE_POINTER types * don't register any information about how to copy/free them, there * is no guarantee that the pointer will remain valid, and there is * nothing registered to release the pointer when the pointer goes out * of scope. This is why we don't recommend people use these types. * * Returns: the boxed wrapper. */ PyObject * pyg_pointer_new(GType pointer_type, gpointer pointer) { PyGILState_STATE state; PyGPointer *self; PyTypeObject *tp; g_return_val_if_fail(pointer_type != 0, NULL); state = pyglib_gil_state_ensure(); if (!pointer) { Py_INCREF(Py_None); pyglib_gil_state_release(state); return Py_None; } tp = g_type_get_qdata(pointer_type, pygpointer_class_key); if (!tp) tp = (PyTypeObject *)pygi_type_import_by_g_type(pointer_type); if (!tp) tp = (PyTypeObject *)&PyGPointer_Type; /* fallback */ self = PyObject_NEW(PyGPointer, tp); pyglib_gil_state_release(state); if (self == NULL) return NULL; self->pointer = pointer; self->gtype = pointer_type; return (PyObject *)self; } void pygobject_pointer_register_types(PyObject *d) { pygpointer_class_key = g_quark_from_static_string("PyGPointer::class"); PyGPointer_Type.tp_dealloc = (destructor)pyg_pointer_dealloc; PyGPointer_Type.tp_compare = (cmpfunc)pyg_pointer_compare; PyGPointer_Type.tp_repr = (reprfunc)pyg_pointer_repr; PyGPointer_Type.tp_hash = (hashfunc)pyg_pointer_hash; PyGPointer_Type.tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE; PyGPointer_Type.tp_init = (initproc)pyg_pointer_init; PyGPointer_Type.tp_free = (freefunc)pyg_pointer_free; PYGOBJECT_REGISTER_GTYPE(d, PyGPointer_Type, "GPointer", G_TYPE_POINTER); }