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/* Python interface to inferior events.
Copyright (C) 2009-2013 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 "py-event.h"
void
evpy_dealloc (PyObject *self)
{
Py_XDECREF (((event_object *) self)->dict);
Py_TYPE (self)->tp_free (self);
}
PyObject *
create_event_object (PyTypeObject *py_type)
{
event_object *event_obj;
event_obj = PyObject_New (event_object, py_type);
if (!event_obj)
goto fail;
event_obj->dict = PyDict_New ();
if (!event_obj->dict)
goto fail;
return (PyObject*) event_obj;
fail:
Py_XDECREF (event_obj);
return NULL;
}
/* Add the attribute ATTR to the event object EVENT. In
python this attribute will be accessible by the name NAME.
returns 0 if the operation succeeds and -1 otherwise. This
function acquires a new reference to ATTR. */
int
evpy_add_attribute (PyObject *event, char *name, PyObject *attr)
{
return PyObject_SetAttrString (event, name, attr);
}
/* Initialize the Python event code. */
int
gdbpy_initialize_event (void)
{
return gdbpy_initialize_event_generic (&event_object_type,
"Event");
}
/* Initialize the given event type. If BASE is not NULL it will
be set as the types base.
Returns 0 if initialization was successful -1 otherwise. */
int
gdbpy_initialize_event_generic (PyTypeObject *type,
char *name)
{
if (PyType_Ready (type) < 0)
return -1;
Py_INCREF (type);
if (PyModule_AddObject (gdb_module, name, (PyObject *) type) < 0)
goto fail;
return 0;
fail:
Py_XDECREF (type);
return -1;
}
/* Notify the list of listens that the given EVENT has occurred.
returns 0 if emit is successful -1 otherwise. */
int
evpy_emit_event (PyObject *event,
eventregistry_object *registry)
{
PyObject *callback_list_copy = NULL;
Py_ssize_t i;
/* Create a copy of call back list and use that for
notifying listeners to avoid skipping callbacks
in the case of a callback being disconnected during
a notification. */
callback_list_copy = PySequence_List (registry->callbacks);
if (!callback_list_copy)
goto fail;
for (i = 0; i < PyList_Size (callback_list_copy); i++)
{
PyObject *func = PyList_GetItem (callback_list_copy, i);
PyObject *func_result;
if (func == NULL)
goto fail;
func_result = PyObject_CallFunctionObjArgs (func, event, NULL);
if (func_result == NULL)
{
/* Print the trace here, but keep going -- we want to try to
call all of the callbacks even if one is broken. */
gdbpy_print_stack ();
}
else
{
Py_DECREF (func_result);
}
}
Py_XDECREF (callback_list_copy);
Py_XDECREF (event);
return 0;
fail:
gdbpy_print_stack ();
Py_XDECREF (callback_list_copy);
Py_XDECREF (event);
return -1;
}
static PyGetSetDef event_object_getset[] =
{
{ "__dict__", gdb_py_generic_dict, NULL,
"The __dict__ for this event.", &event_object_type },
{ NULL }
};
PyTypeObject event_object_type =
{
PyVarObject_HEAD_INIT (NULL, 0)
"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 */
offsetof (event_object, dict), /* tp_dictoffset */
0, /* tp_init */
0 /* tp_alloc */
};
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