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[RFC][2/5] Event and event registry
- From: Oguz Kayral <oguzkayral at gmail dot com>
- To: archer at sourceware dot org
- Date: Sun, 23 Aug 2009 18:35:32 +0300
- Subject: [RFC][2/5] Event and event registry
These two new files adds event registries and events to Python scripting.
An event registry contains a list of callbacks to be fired when an event occurs.
python-eventregistry.c:
evregpy_connect(): New function for adding a callable python object to
the callback list of an event.
evregpy_disconnect(): New function for deleting a callable python
object from the callback list of an event.
/* Python interface to inferior thread event registries.
Copyright (C) 2009 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 "python-internal.h"
static PyTypeObject eventregistry_object_type;
/* Implementation of EventRegistry.connect () -> NULL */
static PyObject *
evregpy_connect (PyObject *self, PyObject *function)
{
PyObject *func;
PyObject *callback_list = (PyObject *) (((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;
}
Py_INCREF (func);
PyList_Append (callback_list, func);
Py_RETURN_NONE;
}
/* Implementation of EventRegistry.disconnect () -> NULL */
static PyObject *
evregpy_disconnect (PyObject *self, PyObject *function)
{
PyObject *func;
PyObject *callback_list = (PyObject *) (((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;
}
Py_INCREF (func);
PySequence_DelItem (callback_list, PySequence_Index (callback_list, func));
Py_RETURN_NONE;
}
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 = (PyListObject *) PyList_New (0);
return eventregistry_obj;
}
static void
evregpy_dealloc (PyObject *self)
{
Py_DECREF (((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);
}
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 */
};
--------
An event object contains the details of an occured event (exit code,
breakpoint number, stop reason etc.)
/* Python interface to inferior events.
Copyright (C) 2009 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 "python-internal.h"
#include "inferior.h"
event_object *
create_event_object (const char *event_type)
{
event_object *event_obj;
event_obj = PyObject_New (event_object, &event_object_type);
if (!event_obj)
return NULL;
event_obj->inferior_thread = find_thread_object (inferior_ptid);
Py_INCREF (event_obj->inferior_thread);
event_obj->event_type = (PyStringObject *) PyString_FromString (event_type);
return event_obj;
}
static void
evpy_dealloc (PyObject *self)
{
Py_DECREF (((event_object *) self)->inferior_thread);
self->ob_type->tp_free (self);
}
/* Python function to get the event's thread. */
static PyObject *
evpy_get_inferior_thread (PyObject *self, void *closure)
{
event_object *event_obj = (event_object *) self;
Py_INCREF (event_obj->inferior_thread);
return (PyObject *) (event_obj->inferior_thread);
}
/* Python function to get the event's type. */
static PyObject *
evpy_get_event_type (PyObject *self, void *closure)
{
event_object *event_obj = (event_object *) self;
Py_INCREF (event_obj->event_type);
return (PyObject *) (event_obj->event_type);
}
/* Initialize the Python event code. */
void
gdbpy_initialize_event (void)
{
if (PyType_Ready (&event_object_type) < 0)
return;
Py_INCREF (&event_object_type);
PyModule_AddObject (gdb_module, "Event", (PyObject *) &event_object_type);
}
static PyGetSetDef event_object_getset[] =
{
{ "inferior_thread", evpy_get_inferior_thread, NULL, "Inferior
thread.", NULL },
{ "event_type", evpy_get_event_type, NULL, "Event type.", NULL },
{ NULL } /* Sentinel. */
};
PyTypeObject event_object_type =
{
PyObject_HEAD_INIT (NULL)
0, /* ob_size */
"gdb.Event", /* tp_name */
sizeof (event_object), /* tp_basicsize */
0, /* tp_itemsize */
evpy_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 | Py_TPFLAGS_BASETYPE, /* tp_flags */
"GDB event object", /* 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 */
event_object_getset, /* 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 */
};