projects / babeltrace.git / blame
| Commit | Line | Data |
|---|---|---|
| 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 | } |