diff options
Diffstat (limited to 'sources/pyside2/libpyside/pysideweakref.cpp')
| -rw-r--r-- | sources/pyside2/libpyside/pysideweakref.cpp | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/sources/pyside2/libpyside/pysideweakref.cpp b/sources/pyside2/libpyside/pysideweakref.cpp new file mode 100644 index 000000000..dfbf9e90c --- /dev/null +++ b/sources/pyside2/libpyside/pysideweakref.cpp @@ -0,0 +1,141 @@ +/**************************************************************************** +** +** Copyright (C) 2016 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of PySide2. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "pysideweakref.h" + +#include <sbkpython.h> + +typedef struct { + PyObject_HEAD + /* Type-specific fields go here. */ + PySideWeakRefFunction weakref_func; + void* user_data; +} PySideCallableObject; + +static PyObject* CallableObject_call(PyObject* callable_object, PyObject* args, PyObject* kw); + +static PyTypeObject PySideCallableObjectType = { + PyVarObject_HEAD_INIT(0, 0) + const_cast<char*>("PySide.Callable"), + sizeof(PySideCallableObject), /*tp_basicsize*/ + 0, /*tp_itemsize*/ + 0, /*tp_dealloc*/ + 0, /*tp_print*/ + 0, /*tp_getattr*/ + 0, /*tp_setattr*/ + 0, /*tp_compare*/ + 0, /*tp_repr*/ + 0, /*tp_as_number*/ + 0, /*tp_as_sequence*/ + 0, /*tp_as_mapping*/ + 0, /*tp_hash */ + CallableObject_call, /*tp_call*/ + 0, /*tp_str*/ + 0, /*tp_getattro*/ + 0, /*tp_setattro*/ + 0, /*tp_as_buffer*/ + Py_TPFLAGS_DEFAULT, /*tp_flags*/ + 0, /* tp_doc */ + 0, /* tp_traverse */ + 0, /* tp_clear */ + 0, /* tp_richcompare */ + 0, /* tp_weaklistoffset */ + 0, /* tp_iter */ + 0, /* tp_iternext */ + 0, /* tp_methods */ + 0, /* tp_members */ + 0, /* tp_getset */ + 0, /* tp_base */ + 0, /* tp_dict */ + 0, /* tp_descr_get */ + 0, /* tp_descr_set */ + 0, /* tp_dictoffset */ + 0, /* tp_init */ + 0, /* tp_alloc */ + 0, /* tp_new */ + 0, /* tp_free */ + 0, /* tp_is_gc */ + 0, /* tp_bases */ + 0, /* tp_mro */ + 0, /* tp_cache */ + 0, /* tp_subclasses */ + 0, /* tp_weaklist */ + 0, /* tp_del */ + 0 /* tp_version_tag */ +}; + +static PyObject *CallableObject_call(PyObject *callable_object, PyObject *args, PyObject * /* kw */) +{ + PySideCallableObject* obj = reinterpret_cast<PySideCallableObject *>(callable_object); + obj->weakref_func(obj->user_data); + + Py_XDECREF(PyTuple_GET_ITEM(args, 0)); //kill weak ref object + Py_RETURN_NONE; +} + +namespace PySide { namespace WeakRef { + +PyObject* create(PyObject* obj, PySideWeakRefFunction func, void* userData) +{ + if (obj == Py_None) + return 0; + + if (Py_TYPE(&PySideCallableObjectType) == 0) + { + Py_TYPE(&PySideCallableObjectType) = &PyType_Type; + PyType_Ready(&PySideCallableObjectType); + } + + PySideCallableObject* callable = PyObject_New(PySideCallableObject, &PySideCallableObjectType); + if (!callable || PyErr_Occurred()) + return 0; + + PyObject* weak = PyWeakref_NewRef(obj, reinterpret_cast<PyObject *>(callable)); + if (!weak || PyErr_Occurred()) + return 0; + + callable->weakref_func = func; + callable->user_data = userData; + Py_DECREF(callable); // PYSIDE-79: after decref the callable is undefined (theoretically) + + return reinterpret_cast<PyObject *>(weak); +} + +} } //namespace + |