1 /* Python interface to inferior thread event registries.
3 Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "py-events.h"
24 events_object gdb_py_events;
26 static PyTypeObject eventregistry_object_type;
28 /* Implementation of EventRegistry.connect () -> NULL.
29 Add FUNCTION to the list of listeners. */
32 evregpy_connect (PyObject *self, PyObject *function)
35 PyObject *callback_list = (((eventregistry_object *) self)->callbacks);
37 if (!PyArg_ParseTuple (function, "O", &func))
40 if (!PyCallable_Check (func))
42 PyErr_SetString (PyExc_RuntimeError, "Function is not callable");
46 if (PyList_Append (callback_list, func) < 0)
52 /* Implementation of EventRegistry.disconnect () -> NULL.
53 Remove FUNCTION from the list of listeners. */
56 evregpy_disconnect (PyObject *self, PyObject *function)
60 PyObject *callback_list = (((eventregistry_object *) self)->callbacks);
62 if (!PyArg_ParseTuple (function, "O", &func))
65 index = PySequence_Index (callback_list, func);
69 if (PySequence_DelItem (callback_list, index) < 0)
75 /* Create a new event registry. This function uses PyObject_New
76 and therefore returns a new reference that callers must handle. */
78 eventregistry_object *
79 create_eventregistry_object (void)
81 eventregistry_object *eventregistry_obj;
83 eventregistry_obj = PyObject_New (eventregistry_object,
84 &eventregistry_object_type);
86 if (!eventregistry_obj)
89 eventregistry_obj->callbacks = PyList_New (0);
90 if (!eventregistry_obj->callbacks)
93 return eventregistry_obj;
97 evregpy_dealloc (PyObject *self)
99 Py_XDECREF (((eventregistry_object *) self)->callbacks);
100 self->ob_type->tp_free (self);
103 /* Initialize the Python event registry code. */
106 gdbpy_initialize_eventregistry (void)
108 if (PyType_Ready (&eventregistry_object_type) < 0)
111 Py_INCREF (&eventregistry_object_type);
112 PyModule_AddObject (gdb_module, "EventRegistry",
113 (PyObject *) &eventregistry_object_type);
116 /* Retern the number of listeners currently connected to this
120 evregpy_no_listeners_p (eventregistry_object *registry)
122 return PyList_Size (registry->callbacks) == 0;
125 static PyMethodDef eventregistry_object_methods[] =
127 { "connect", evregpy_connect, METH_VARARGS, "Add function" },
128 { "disconnect", evregpy_disconnect, METH_VARARGS, "Remove function" },
129 { NULL } /* Sentinel. */
132 static PyTypeObject eventregistry_object_type =
134 PyObject_HEAD_INIT (NULL)
136 "gdb.EventRegistry", /* tp_name */
137 sizeof (eventregistry_object), /* tp_basicsize */
139 evregpy_dealloc, /* tp_dealloc */
145 0, /* tp_as_number */
146 0, /* tp_as_sequence */
147 0, /* tp_as_mapping */
153 0, /* tp_as_buffer */
154 Py_TPFLAGS_DEFAULT, /* tp_flags */
155 "GDB event registry object", /* tp_doc */
158 0, /* tp_richcompare */
159 0, /* tp_weaklistoffset */
162 eventregistry_object_methods, /* tp_methods */
167 0, /* tp_descr_get */
168 0, /* tp_descr_set */
169 0, /* tp_dictoffset */