2 * SPDX-License-Identifier: MIT
4 * Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
7 #ifndef BABELTRACE_BINDINGS_PYTHON_BT2_BT2_NATIVE_BT_BT2_OBJECTS_H
8 #define BABELTRACE_BINDINGS_PYTHON_BT2_BT2_NATIVE_BT_BT2_OBJECTS_H
10 #include "logging/comp-logging.h"
13 * Useful Python objects.
16 static PyObject
*py_mod_bt2
= NULL
;
17 static PyObject
*py_mod_bt2_exc_error_type
= NULL
;
18 static PyObject
*py_mod_bt2_exc_memory_error
= NULL
;
19 static PyObject
*py_mod_bt2_exc_try_again_type
= NULL
;
20 static PyObject
*py_mod_bt2_exc_stop_type
= NULL
;
21 static PyObject
*py_mod_bt2_exc_unknown_object_type
= NULL
;
24 void bt_bt2_init_from_bt2(void)
27 * This is called once the bt2 package is loaded.
29 * Those modules and functions are needed while the package is
30 * used. Loading them here is safe because we know the bt2
31 * package is imported, and we know that the user cannot use the
32 * code here without importing bt2 first.
34 py_mod_bt2
= PyImport_ImportModule("bt2");
35 BT_ASSERT(py_mod_bt2
);
36 py_mod_bt2_exc_error_type
=
37 PyObject_GetAttrString(py_mod_bt2
, "_Error");
38 BT_ASSERT(py_mod_bt2_exc_error_type
);
39 py_mod_bt2_exc_memory_error
=
40 PyObject_GetAttrString(py_mod_bt2
, "_MemoryError");
41 BT_ASSERT(py_mod_bt2_exc_memory_error
);
42 py_mod_bt2_exc_try_again_type
=
43 PyObject_GetAttrString(py_mod_bt2
, "TryAgain");
44 BT_ASSERT(py_mod_bt2_exc_try_again_type
);
45 py_mod_bt2_exc_stop_type
=
46 PyObject_GetAttrString(py_mod_bt2
, "Stop");
47 BT_ASSERT(py_mod_bt2_exc_stop_type
);
48 py_mod_bt2_exc_unknown_object_type
=
49 PyObject_GetAttrString(py_mod_bt2
, "UnknownObject");
50 BT_ASSERT(py_mod_bt2_exc_unknown_object_type
);
54 void bt_bt2_exit_handler(void)
57 * This is an exit handler (set by the bt2 package).
59 * We only give back the references that we took in
60 * bt_bt2_init_from_bt2() here. The global variables continue
61 * to exist for the code of this file, but they are now borrowed
62 * references. If this code is executed, it means that somehow
63 * the modules are still loaded, so it should be safe to use
64 * them even without a strong reference.
66 * We cannot do this in the library's destructor because it
67 * gets executed once Python is already finalized.
69 Py_XDECREF(py_mod_bt2
);
70 Py_XDECREF(py_mod_bt2_exc_error_type
);
71 Py_XDECREF(py_mod_bt2_exc_try_again_type
);
72 Py_XDECREF(py_mod_bt2_exc_stop_type
);
73 Py_XDECREF(py_mod_bt2_exc_unknown_object_type
);
76 #endif /* BABELTRACE_BINDINGS_PYTHON_BT2_BT2_NATIVE_BT_BT2_OBJECTS_H */