171 lines
5.7 KiB
C
171 lines
5.7 KiB
C
/* Python interface to inferior thread event registries.
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Copyright (C) 2009-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "command.h"
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#include "py-events.h"
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events_object gdb_py_events;
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extern PyTypeObject eventregistry_object_type
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CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("eventregistry_object");
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/* Implementation of EventRegistry.connect () -> NULL.
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Add FUNCTION to the list of listeners. */
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static PyObject *
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evregpy_connect (PyObject *self, PyObject *function)
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{
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PyObject *func;
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PyObject *callback_list = (((eventregistry_object *) self)->callbacks);
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if (!PyArg_ParseTuple (function, "O", &func))
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return NULL;
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if (!PyCallable_Check (func))
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{
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PyErr_SetString (PyExc_RuntimeError, "Function is not callable");
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return NULL;
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}
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if (PyList_Append (callback_list, func) < 0)
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return NULL;
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Py_RETURN_NONE;
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}
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/* Implementation of EventRegistry.disconnect () -> NULL.
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Remove FUNCTION from the list of listeners. */
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static PyObject *
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evregpy_disconnect (PyObject *self, PyObject *function)
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{
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PyObject *func;
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int index;
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PyObject *callback_list = (((eventregistry_object *) self)->callbacks);
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if (!PyArg_ParseTuple (function, "O", &func))
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return NULL;
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index = PySequence_Index (callback_list, func);
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if (index < 0)
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Py_RETURN_NONE;
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if (PySequence_DelItem (callback_list, index) < 0)
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return NULL;
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Py_RETURN_NONE;
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}
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/* Create a new event registry. This function uses PyObject_New
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and therefore returns a new reference that callers must handle. */
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eventregistry_object *
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create_eventregistry_object (void)
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{
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gdbpy_ref<eventregistry_object>
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eventregistry_obj (PyObject_New (eventregistry_object,
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&eventregistry_object_type));
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if (eventregistry_obj == NULL)
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return NULL;
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eventregistry_obj->callbacks = PyList_New (0);
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if (!eventregistry_obj->callbacks)
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return NULL;
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return eventregistry_obj.release ();
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}
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static void
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evregpy_dealloc (PyObject *self)
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{
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Py_XDECREF (((eventregistry_object *) self)->callbacks);
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Py_TYPE (self)->tp_free (self);
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}
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/* Initialize the Python event registry code. */
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int
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gdbpy_initialize_eventregistry (void)
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{
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if (PyType_Ready (&eventregistry_object_type) < 0)
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return -1;
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return gdb_pymodule_addobject (gdb_module, "EventRegistry",
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(PyObject *) &eventregistry_object_type);
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}
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/* Return the number of listeners currently connected to this
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registry. */
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int
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evregpy_no_listeners_p (eventregistry_object *registry)
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{
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return PyList_Size (registry->callbacks) == 0;
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}
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static PyMethodDef eventregistry_object_methods[] =
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{
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{ "connect", evregpy_connect, METH_VARARGS, "Add function" },
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{ "disconnect", evregpy_disconnect, METH_VARARGS, "Remove function" },
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{ NULL } /* Sentinel. */
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};
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PyTypeObject eventregistry_object_type =
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{
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PyVarObject_HEAD_INIT (NULL, 0)
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"gdb.EventRegistry", /* tp_name */
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sizeof (eventregistry_object), /* tp_basicsize */
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0, /* tp_itemsize */
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evregpy_dealloc, /* tp_dealloc */
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0, /* tp_print */
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0, /* tp_getattr */
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0, /* tp_setattr */
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0, /* tp_compare */
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0, /* tp_repr */
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0, /* tp_as_number */
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0, /* tp_as_sequence */
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0, /* tp_as_mapping */
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0, /* tp_hash */
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0, /* tp_call */
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0, /* tp_str */
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0, /* tp_getattro */
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0, /* tp_setattro */
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0, /* tp_as_buffer */
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Py_TPFLAGS_DEFAULT, /* tp_flags */
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"GDB event registry object", /* tp_doc */
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0, /* tp_traverse */
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0, /* tp_clear */
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0, /* tp_richcompare */
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0, /* tp_weaklistoffset */
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0, /* tp_iter */
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0, /* tp_iternext */
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eventregistry_object_methods, /* tp_methods */
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0, /* tp_members */
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0, /* tp_getset */
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0, /* tp_base */
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0, /* tp_dict */
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0, /* tp_descr_get */
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0, /* tp_descr_set */
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0, /* tp_dictoffset */
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0, /* tp_init */
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0 /* tp_alloc */
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};
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