1 /* Python interface to inferior thread event registries.
3 Copyright (C) 2009-2017 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"
25 events_object gdb_py_events
;
27 extern PyTypeObject eventregistry_object_type
28 CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("eventregistry_object");
30 /* Implementation of EventRegistry.connect () -> NULL.
31 Add FUNCTION to the list of listeners. */
34 evregpy_connect (PyObject
*self
, PyObject
*function
)
37 PyObject
*callback_list
= (((eventregistry_object
*) self
)->callbacks
);
39 if (!PyArg_ParseTuple (function
, "O", &func
))
42 if (!PyCallable_Check (func
))
44 PyErr_SetString (PyExc_RuntimeError
, "Function is not callable");
48 if (PyList_Append (callback_list
, func
) < 0)
54 /* Implementation of EventRegistry.disconnect () -> NULL.
55 Remove FUNCTION from the list of listeners. */
58 evregpy_disconnect (PyObject
*self
, PyObject
*function
)
62 PyObject
*callback_list
= (((eventregistry_object
*) self
)->callbacks
);
64 if (!PyArg_ParseTuple (function
, "O", &func
))
67 index
= PySequence_Index (callback_list
, func
);
71 if (PySequence_DelItem (callback_list
, index
) < 0)
77 /* Create a new event registry. This function uses PyObject_New
78 and therefore returns a new reference that callers must handle. */
80 eventregistry_object
*
81 create_eventregistry_object (void)
83 gdbpy_ref
<eventregistry_object
>
84 eventregistry_obj (PyObject_New (eventregistry_object
,
85 &eventregistry_object_type
));
87 if (eventregistry_obj
== NULL
)
90 eventregistry_obj
->callbacks
= PyList_New (0);
91 if (!eventregistry_obj
->callbacks
)
94 return eventregistry_obj
.release ();
98 evregpy_dealloc (PyObject
*self
)
100 Py_XDECREF (((eventregistry_object
*) self
)->callbacks
);
101 Py_TYPE (self
)->tp_free (self
);
104 /* Initialize the Python event registry code. */
107 gdbpy_initialize_eventregistry (void)
109 if (PyType_Ready (&eventregistry_object_type
) < 0)
112 return gdb_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 PyTypeObject eventregistry_object_type
=
134 PyVarObject_HEAD_INIT (NULL
, 0)
135 "gdb.EventRegistry", /* tp_name */
136 sizeof (eventregistry_object
), /* tp_basicsize */
138 evregpy_dealloc
, /* tp_dealloc */
144 0, /* tp_as_number */
145 0, /* tp_as_sequence */
146 0, /* tp_as_mapping */
152 0, /* tp_as_buffer */
153 Py_TPFLAGS_DEFAULT
, /* tp_flags */
154 "GDB event registry object", /* tp_doc */
157 0, /* tp_richcompare */
158 0, /* tp_weaklistoffset */
161 eventregistry_object_methods
, /* tp_methods */
166 0, /* tp_descr_get */
167 0, /* tp_descr_set */
168 0, /* tp_dictoffset */