diff options
Diffstat (limited to 'gdb/python/py-evtregistry.c')
| -rw-r--r-- | gdb/python/py-evtregistry.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/gdb/python/py-evtregistry.c b/gdb/python/py-evtregistry.c new file mode 100644 index 0000000..e1b4346 --- /dev/null +++ b/gdb/python/py-evtregistry.c @@ -0,0 +1,170 @@ +/* Python interface to inferior thread event registries. + + Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include "defs.h" +#include "command.h" +#include "py-events.h" + +static PyTypeObject eventregistry_object_type; + +/* Implementation of EventRegistry.connect () -> NULL. + Add FUNCTION to the list of listeners. */ + +static PyObject * +evregpy_connect (PyObject *self, PyObject *function) +{ + PyObject *func; + PyObject *callback_list = (((eventregistry_object *) self)->callbacks); + + if (!PyArg_ParseTuple (function, "O", &func)) + return NULL; + + if (!PyCallable_Check (func)) + { + PyErr_SetString (PyExc_RuntimeError, "Function is not callable"); + return NULL; + } + + if (PyList_Append (callback_list, func) < 0) + return NULL; + + Py_RETURN_NONE; +} + +/* Implementation of EventRegistry.disconnect () -> NULL. + Remove FUNCTION from the list of listeners. */ + +static PyObject * +evregpy_disconnect (PyObject *self, PyObject *function) +{ + PyObject *func; + int index; + PyObject *callback_list = (((eventregistry_object *) self)->callbacks); + + if (!PyArg_ParseTuple (function, "O", &func)) + return NULL; + + index = PySequence_Index (callback_list, func); + if (index < 0) + Py_RETURN_NONE; + + if (PySequence_DelItem (callback_list, index) < 0) + return NULL; + + Py_RETURN_NONE; +} + +/* Create a new event registry. This function uses PyObject_New + and therefore returns a new reference that callers must handle. */ + +eventregistry_object * +create_eventregistry_object (void) +{ + eventregistry_object *eventregistry_obj; + + eventregistry_obj = PyObject_New (eventregistry_object, + &eventregistry_object_type); + + if (!eventregistry_obj) + return NULL; + + eventregistry_obj->callbacks = PyList_New (0); + if (!eventregistry_obj->callbacks) + return NULL; + + return eventregistry_obj; +} + +static void +evregpy_dealloc (PyObject *self) +{ + Py_XDECREF (((eventregistry_object *) self)->callbacks); + self->ob_type->tp_free (self); +} + +/* Initialize the Python event registry code. */ + +void +gdbpy_initialize_eventregistry (void) +{ + if (PyType_Ready (&eventregistry_object_type) < 0) + return; + + Py_INCREF (&eventregistry_object_type); + PyModule_AddObject (gdb_module, "EventRegistry", + (PyObject *) &eventregistry_object_type); +} + +/* Retern the number of listeners currently connected to this + registry. */ + +int +evregpy_no_listeners_p (eventregistry_object *registry) +{ + return PyList_Size (registry->callbacks) == 0; +} + +static PyMethodDef eventregistry_object_methods[] = +{ + { "connect", evregpy_connect, METH_VARARGS, "Add function" }, + { "disconnect", evregpy_disconnect, METH_VARARGS, "Remove function" }, + { NULL } /* Sentinel. */ +}; + +static PyTypeObject eventregistry_object_type = +{ + PyObject_HEAD_INIT (NULL) + 0, /* ob_size */ + "gdb.EventRegistry", /* tp_name */ + sizeof (eventregistry_object), /* tp_basicsize */ + 0, /* tp_itemsize */ + evregpy_dealloc, /* 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 */ + 0, /* tp_call */ + 0, /* tp_str */ + 0, /* tp_getattro */ + 0, /* tp_setattro */ + 0, /* tp_as_buffer */ + Py_TPFLAGS_DEFAULT, /* tp_flags */ + "GDB event registry object", /* tp_doc */ + 0, /* tp_traverse */ + 0, /* tp_clear */ + 0, /* tp_richcompare */ + 0, /* tp_weaklistoffset */ + 0, /* tp_iter */ + 0, /* tp_iternext */ + eventregistry_object_methods, /* 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 */ +}; |