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c17a9e46 HZ |
1 | /* Python interface to inferior events. |
2 | ||
3 | Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
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. | |
11 | ||
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. | |
16 | ||
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/>. */ | |
19 | ||
20 | #include "py-event.h" | |
21 | ||
22 | void | |
23 | evpy_dealloc (PyObject *self) | |
24 | { | |
25 | Py_XDECREF (((event_object *) self)->dict); | |
26 | self->ob_type->tp_free (self); | |
27 | } | |
28 | ||
29 | PyObject * | |
30 | create_event_object (PyTypeObject *py_type) | |
31 | { | |
32 | event_object *event_obj; | |
33 | ||
34 | event_obj = PyObject_New (event_object, py_type); | |
35 | if (!event_obj) | |
36 | goto fail; | |
37 | ||
38 | event_obj->dict = PyDict_New (); | |
39 | if (!event_obj->dict) | |
40 | goto fail; | |
41 | ||
42 | return (PyObject*) event_obj; | |
43 | ||
44 | fail: | |
45 | Py_XDECREF (event_obj); | |
46 | return NULL; | |
47 | } | |
48 | ||
49 | /* Add the attribute ATTR to the event object EVENT. In | |
50 | python this attribute will be accessible by the name NAME. | |
51 | returns 0 if the operation succeeds and -1 otherwise. */ | |
52 | ||
53 | int | |
54 | evpy_add_attribute (PyObject *event, char *name, PyObject *attr) | |
55 | { | |
56 | return PyObject_SetAttrString (event, name, attr); | |
57 | } | |
58 | ||
59 | /* Initialize the Python event code. */ | |
60 | ||
61 | void | |
62 | gdbpy_initialize_event (void) | |
63 | { | |
64 | gdbpy_initialize_event_generic (&event_object_type, | |
65 | "Event"); | |
66 | } | |
67 | ||
68 | /* Initialize the given event type. If BASE is not NULL it will | |
69 | be set as the types base. | |
70 | Returns 0 if initialization was successful -1 otherwise. */ | |
71 | ||
72 | int | |
73 | gdbpy_initialize_event_generic (PyTypeObject *type, | |
74 | char *name) | |
75 | { | |
76 | if (PyType_Ready (type) < 0) | |
77 | goto fail; | |
78 | ||
79 | Py_INCREF (type); | |
80 | if (PyModule_AddObject (gdb_module, name, (PyObject *) type) < 0) | |
81 | goto fail; | |
82 | ||
83 | return 0; | |
84 | ||
85 | fail: | |
86 | Py_XDECREF (type); | |
87 | return -1; | |
88 | } | |
89 | ||
90 | ||
91 | /* Notify the list of listens that the given EVENT has occurred. | |
92 | returns 0 if emit is successful -1 otherwise. */ | |
93 | ||
94 | int | |
95 | evpy_emit_event (PyObject *event, | |
96 | eventregistry_object *registry) | |
97 | { | |
98 | PyObject *callback_list_copy = NULL; | |
99 | Py_ssize_t i; | |
100 | ||
101 | /* Create a copy of call back list and use that for | |
102 | notifying listeners to avoid skipping callbacks | |
103 | in the case of a callback being disconnected during | |
104 | a notification. */ | |
105 | callback_list_copy = PySequence_List (registry->callbacks); | |
106 | if (!callback_list_copy) | |
107 | goto fail; | |
108 | ||
109 | for (i = 0; i < PyList_Size (callback_list_copy); i++) | |
110 | { | |
111 | PyObject *func = PyList_GetItem (callback_list_copy, i); | |
112 | ||
113 | if (func == NULL) | |
114 | goto fail; | |
115 | ||
116 | if (!PyObject_CallFunctionObjArgs (func, event, NULL)) | |
117 | { | |
118 | /* Print the trace here, but keep going -- we want to try to | |
119 | call all of the callbacks even if one is broken. */ | |
120 | gdbpy_print_stack (); | |
121 | } | |
122 | } | |
123 | ||
124 | Py_XDECREF (callback_list_copy); | |
125 | Py_XDECREF (event); | |
126 | return 0; | |
127 | ||
128 | fail: | |
129 | gdbpy_print_stack (); | |
130 | Py_XDECREF (callback_list_copy); | |
131 | Py_XDECREF (event); | |
132 | return -1; | |
133 | } | |
134 | ||
135 | PyTypeObject event_object_type = | |
136 | { | |
137 | PyObject_HEAD_INIT (NULL) | |
138 | 0, /* ob_size */ | |
139 | "gdb.Event", /* tp_name */ | |
140 | sizeof (event_object), /* tp_basicsize */ | |
141 | 0, /* tp_itemsize */ | |
142 | evpy_dealloc, /* tp_dealloc */ | |
143 | 0, /* tp_print */ | |
144 | 0, /* tp_getattr */ | |
145 | 0, /* tp_setattr */ | |
146 | 0, /* tp_compare */ | |
147 | 0, /* tp_repr */ | |
148 | 0, /* tp_as_number */ | |
149 | 0, /* tp_as_sequence */ | |
150 | 0, /* tp_as_mapping */ | |
151 | 0, /* tp_hash */ | |
152 | 0, /* tp_call */ | |
153 | 0, /* tp_str */ | |
154 | 0, /* tp_getattro */ | |
155 | 0, /* tp_setattro */ | |
156 | 0, /* tp_as_buffer */ | |
157 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ | |
158 | "GDB event object", /* tp_doc */ | |
159 | 0, /* tp_traverse */ | |
160 | 0, /* tp_clear */ | |
161 | 0, /* tp_richcompare */ | |
162 | 0, /* tp_weaklistoffset */ | |
163 | 0, /* tp_iter */ | |
164 | 0, /* tp_iternext */ | |
165 | 0, /* tp_methods */ | |
166 | 0, /* tp_members */ | |
167 | 0, /* tp_getset */ | |
168 | 0, /* tp_base */ | |
169 | 0, /* tp_dict */ | |
170 | 0, /* tp_descr_get */ | |
171 | 0, /* tp_descr_set */ | |
172 | offsetof (event_object, dict), /* tp_dictoffset */ | |
173 | 0, /* tp_init */ | |
174 | 0 /* tp_alloc */ | |
175 | }; |