| 1 | /* |
| 2 | * The MIT License (MIT) |
| 3 | * |
| 4 | * Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 7 | * of this software and associated documentation files (the "Software"), to deal |
| 8 | * in the Software without restriction, including without limitation the rights |
| 9 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 10 | * copies of the Software, and to permit persons to whom the Software is |
| 11 | * furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in |
| 14 | * all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 19 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 21 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 22 | * THE SOFTWARE. |
| 23 | */ |
| 24 | |
| 25 | #include "logging/comp-logging.h" |
| 26 | |
| 27 | |
| 28 | /* |
| 29 | * Useful Python objects. |
| 30 | */ |
| 31 | |
| 32 | static PyObject *py_mod_bt2 = NULL; |
| 33 | static PyObject *py_mod_bt2_exc_error_type = NULL; |
| 34 | static PyObject *py_mod_bt2_exc_memory_error = NULL; |
| 35 | static PyObject *py_mod_bt2_exc_try_again_type = NULL; |
| 36 | static PyObject *py_mod_bt2_exc_stop_type = NULL; |
| 37 | static PyObject *py_mod_bt2_exc_unknown_object_type = NULL; |
| 38 | |
| 39 | static |
| 40 | void bt_bt2_init_from_bt2(void) |
| 41 | { |
| 42 | /* |
| 43 | * This is called once the bt2 package is loaded. |
| 44 | * |
| 45 | * Those modules and functions are needed while the package is |
| 46 | * used. Loading them here is safe because we know the bt2 |
| 47 | * package is imported, and we know that the user cannot use the |
| 48 | * code here without importing bt2 first. |
| 49 | */ |
| 50 | py_mod_bt2 = PyImport_ImportModule("bt2"); |
| 51 | BT_ASSERT(py_mod_bt2); |
| 52 | py_mod_bt2_exc_error_type = |
| 53 | PyObject_GetAttrString(py_mod_bt2, "_Error"); |
| 54 | BT_ASSERT(py_mod_bt2_exc_error_type); |
| 55 | py_mod_bt2_exc_memory_error = |
| 56 | PyObject_GetAttrString(py_mod_bt2, "_MemoryError"); |
| 57 | BT_ASSERT(py_mod_bt2_exc_memory_error); |
| 58 | py_mod_bt2_exc_try_again_type = |
| 59 | PyObject_GetAttrString(py_mod_bt2, "TryAgain"); |
| 60 | BT_ASSERT(py_mod_bt2_exc_try_again_type); |
| 61 | py_mod_bt2_exc_stop_type = |
| 62 | PyObject_GetAttrString(py_mod_bt2, "Stop"); |
| 63 | BT_ASSERT(py_mod_bt2_exc_stop_type); |
| 64 | py_mod_bt2_exc_unknown_object_type = |
| 65 | PyObject_GetAttrString(py_mod_bt2, "UnknownObject"); |
| 66 | BT_ASSERT(py_mod_bt2_exc_unknown_object_type); |
| 67 | } |
| 68 | |
| 69 | static |
| 70 | void bt_bt2_exit_handler(void) |
| 71 | { |
| 72 | /* |
| 73 | * This is an exit handler (set by the bt2 package). |
| 74 | * |
| 75 | * We only give back the references that we took in |
| 76 | * bt_bt2_init_from_bt2() here. The global variables continue |
| 77 | * to exist for the code of this file, but they are now borrowed |
| 78 | * references. If this code is executed, it means that somehow |
| 79 | * the modules are still loaded, so it should be safe to use |
| 80 | * them even without a strong reference. |
| 81 | * |
| 82 | * We cannot do this in the library's destructor because it |
| 83 | * gets executed once Python is already finalized. |
| 84 | */ |
| 85 | Py_XDECREF(py_mod_bt2); |
| 86 | Py_XDECREF(py_mod_bt2_exc_error_type); |
| 87 | Py_XDECREF(py_mod_bt2_exc_try_again_type); |
| 88 | Py_XDECREF(py_mod_bt2_exc_stop_type); |
| 89 | Py_XDECREF(py_mod_bt2_exc_unknown_object_type); |
| 90 | } |