Commit | Line | Data |
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612a9870 | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
612a9870 PP |
3 | * |
4 | * Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> | |
612a9870 PP |
5 | */ |
6 | ||
7 | #include "logging/comp-logging.h" | |
8 | ||
9 | ||
10 | /* | |
11 | * Useful Python objects. | |
12 | */ | |
13 | ||
14 | static PyObject *py_mod_bt2 = NULL; | |
15 | static PyObject *py_mod_bt2_exc_error_type = NULL; | |
16 | static PyObject *py_mod_bt2_exc_memory_error = NULL; | |
17 | static PyObject *py_mod_bt2_exc_try_again_type = NULL; | |
18 | static PyObject *py_mod_bt2_exc_stop_type = NULL; | |
19 | static PyObject *py_mod_bt2_exc_unknown_object_type = NULL; | |
20 | ||
21 | static | |
22 | void bt_bt2_init_from_bt2(void) | |
23 | { | |
24 | /* | |
25 | * This is called once the bt2 package is loaded. | |
26 | * | |
27 | * Those modules and functions are needed while the package is | |
28 | * used. Loading them here is safe because we know the bt2 | |
29 | * package is imported, and we know that the user cannot use the | |
30 | * code here without importing bt2 first. | |
31 | */ | |
32 | py_mod_bt2 = PyImport_ImportModule("bt2"); | |
33 | BT_ASSERT(py_mod_bt2); | |
34 | py_mod_bt2_exc_error_type = | |
35 | PyObject_GetAttrString(py_mod_bt2, "_Error"); | |
36 | BT_ASSERT(py_mod_bt2_exc_error_type); | |
37 | py_mod_bt2_exc_memory_error = | |
38 | PyObject_GetAttrString(py_mod_bt2, "_MemoryError"); | |
39 | BT_ASSERT(py_mod_bt2_exc_memory_error); | |
40 | py_mod_bt2_exc_try_again_type = | |
41 | PyObject_GetAttrString(py_mod_bt2, "TryAgain"); | |
42 | BT_ASSERT(py_mod_bt2_exc_try_again_type); | |
43 | py_mod_bt2_exc_stop_type = | |
44 | PyObject_GetAttrString(py_mod_bt2, "Stop"); | |
45 | BT_ASSERT(py_mod_bt2_exc_stop_type); | |
46 | py_mod_bt2_exc_unknown_object_type = | |
47 | PyObject_GetAttrString(py_mod_bt2, "UnknownObject"); | |
48 | BT_ASSERT(py_mod_bt2_exc_unknown_object_type); | |
49 | } | |
50 | ||
51 | static | |
52 | void bt_bt2_exit_handler(void) | |
53 | { | |
54 | /* | |
55 | * This is an exit handler (set by the bt2 package). | |
56 | * | |
57 | * We only give back the references that we took in | |
58 | * bt_bt2_init_from_bt2() here. The global variables continue | |
59 | * to exist for the code of this file, but they are now borrowed | |
60 | * references. If this code is executed, it means that somehow | |
61 | * the modules are still loaded, so it should be safe to use | |
62 | * them even without a strong reference. | |
63 | * | |
64 | * We cannot do this in the library's destructor because it | |
65 | * gets executed once Python is already finalized. | |
66 | */ | |
67 | Py_XDECREF(py_mod_bt2); | |
68 | Py_XDECREF(py_mod_bt2_exc_error_type); | |
69 | Py_XDECREF(py_mod_bt2_exc_try_again_type); | |
70 | Py_XDECREF(py_mod_bt2_exc_stop_type); | |
71 | Py_XDECREF(py_mod_bt2_exc_unknown_object_type); | |
72 | } |