X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=src%2Fbindings%2Fpython%2Fbt2%2Fbt2%2Fnative_bt_component_class.i;h=06710faaef25dedf8ef01a8d1791da39fe7300e7;hb=43c59509042845f8d42c3e99ec74d45fa2dc0908;hp=0fe55f44bf2ec7cf4aae7552f8d510ce8bcd32ab;hpb=d6bb425cb358e7b0db1873209e40a7d3cd7b5905;p=babeltrace.git diff --git a/src/bindings/python/bt2/bt2/native_bt_component_class.i b/src/bindings/python/bt2/bt2/native_bt_component_class.i index 0fe55f44..06710faa 100644 --- a/src/bindings/python/bt2/bt2/native_bt_component_class.i +++ b/src/bindings/python/bt2/bt2/native_bt_component_class.i @@ -22,1157 +22,22 @@ * THE SOFTWARE. */ -%include -%include -%include -%include -%include -%include -%include -%include -%include -%include +%include +%include +%include %{ -/* - * This hash table associates a BT component class object address to a - * user-defined Python class (PyObject *). The keys and values are NOT - * owned by this hash table. The Python class objects are owned by the - * Python module, which should not be unloaded until it is not possible - * to create a user Python component anyway. - * - * This hash table is written to when a user-defined Python component - * class is created by one of the bt_py3_component_class_*_create() - * functions. - * - * This function is read from when a user calls bt_component_create() - * with a component class pointer created by one of the functions above. - * In this case, the original Python class needs to be found to - * instantiate it and associate the created Python component object with - * a BT component object instance. - */ - -static GHashTable *bt_cc_ptr_to_py_cls; - -static void register_cc_ptr_to_py_cls(struct bt_component_class *bt_cc, - PyObject *py_cls) -{ - if (!bt_cc_ptr_to_py_cls) { - /* - * Lazy-initializing this GHashTable because GLib - * might not be initialized yet and it needs to be - * before we call g_hash_table_new() - */ - BT_LOGD_STR("Creating native component class to Python component class hash table."); - bt_cc_ptr_to_py_cls = g_hash_table_new(g_direct_hash, g_direct_equal); - BT_ASSERT(bt_cc_ptr_to_py_cls); - } - - g_hash_table_insert(bt_cc_ptr_to_py_cls, (gpointer) bt_cc, - (gpointer) py_cls); -} - -static PyObject *lookup_cc_ptr_to_py_cls(const bt_component_class *bt_cc) -{ - if (!bt_cc_ptr_to_py_cls) { - BT_LOGW("Cannot look up Python component class because hash table is NULL: " - "comp-cls-addr=%p", bt_cc); - return NULL; - } - - return (PyObject *) g_hash_table_lookup(bt_cc_ptr_to_py_cls, - (gconstpointer) bt_cc); -} - - -/* - * Useful Python objects. - */ - -static PyObject *py_mod_bt2 = NULL; -static PyObject *py_mod_bt2_exc_error_type = NULL; -static PyObject *py_mod_bt2_exc_try_again_type = NULL; -static PyObject *py_mod_bt2_exc_stop_type = NULL; -static PyObject *py_mod_bt2_exc_msg_iter_canceled_type = NULL; -static PyObject *py_mod_bt2_exc_invalid_query_object_type = NULL; -static PyObject *py_mod_bt2_exc_invalid_query_params_type = NULL; - -static void bt_py3_cc_init_from_bt2(void) -{ - /* - * This is called once the bt2 package is loaded. - * - * Those modules and functions are needed while the package is - * used. Loading them here is safe because we know the bt2 - * package is imported, and we know that the user cannot use the - * code here without importing bt2 first. - */ - py_mod_bt2 = PyImport_ImportModule("bt2"); - BT_ASSERT(py_mod_bt2); - py_mod_bt2_exc_error_type = - PyObject_GetAttrString(py_mod_bt2, "Error"); - BT_ASSERT(py_mod_bt2_exc_error_type); - py_mod_bt2_exc_try_again_type = - PyObject_GetAttrString(py_mod_bt2, "TryAgain"); - BT_ASSERT(py_mod_bt2_exc_try_again_type); - py_mod_bt2_exc_stop_type = - PyObject_GetAttrString(py_mod_bt2, "Stop"); - BT_ASSERT(py_mod_bt2_exc_stop_type); - py_mod_bt2_exc_invalid_query_object_type = - PyObject_GetAttrString(py_mod_bt2, "InvalidQueryObject"); - BT_ASSERT(py_mod_bt2_exc_invalid_query_object_type); - py_mod_bt2_exc_invalid_query_params_type = - PyObject_GetAttrString(py_mod_bt2, "InvalidQueryParams"); - BT_ASSERT(py_mod_bt2_exc_invalid_query_params_type); -} - -static void bt_py3_cc_exit_handler(void) -{ - /* - * This is an exit handler (set by the bt2 package). - * - * We only give back the references that we took in - * bt_py3_cc_init_from_bt2() here. The global variables continue - * to exist for the code of this file, but they are now borrowed - * references. If this code is executed, it means that somehow - * the modules are still loaded, so it should be safe to use - * them even without a strong reference. - * - * We cannot do this in the library's destructor because it - * gets executed once Python is already finalized. - */ - Py_XDECREF(py_mod_bt2); - Py_XDECREF(py_mod_bt2_exc_error_type); - Py_XDECREF(py_mod_bt2_exc_try_again_type); - Py_XDECREF(py_mod_bt2_exc_stop_type); - Py_XDECREF(py_mod_bt2_exc_msg_iter_canceled_type); - Py_XDECREF(py_mod_bt2_exc_invalid_query_object_type); - Py_XDECREF(py_mod_bt2_exc_invalid_query_params_type); -} - - -/* Library destructor */ - -__attribute__((destructor)) -static void bt_py3_native_comp_class_dtor(void) { - /* Destroy component class association hash table */ - if (bt_cc_ptr_to_py_cls) { - BT_LOGD_STR("Destroying native component class to Python component class hash table."); - g_hash_table_destroy(bt_cc_ptr_to_py_cls); - } -} - - -// TODO: maybe we can wrap code in the Python methods (e.g. _query_from_native) -// in a try catch and print the error there instead, it would be simpler. -static -void bt2_py_loge_exception(void) -{ - PyObject *type = NULL; - PyObject *value = NULL; - PyObject *traceback = NULL; - PyObject *traceback_module = NULL; - PyObject *format_exception_func = NULL; - PyObject *exc_str_list = NULL; - GString *msg_buf = NULL; - Py_ssize_t i; - - BT_ASSERT(PyErr_Occurred() != NULL); - - PyErr_Fetch(&type, &value, &traceback); - - BT_ASSERT(type != NULL); - - /* - * traceback can be NULL, when we fail to call a Python function from the - * native code (there is no Python stack at that point). E.g.: - * - * TypeError: _query_from_native() takes 5 positional arguments but 8 were given - */ - - - /* Make sure `value` is what we expected - an instance of `type`. */ - PyErr_NormalizeException(&type, &value, &traceback); - - traceback_module = PyImport_ImportModule("traceback"); - if (!traceback_module) { - BT_LOGE_STR("Failed to log Python exception (could not import traceback module)."); - goto end; - } - - format_exception_func = PyObject_GetAttrString(traceback_module, - traceback ? "format_exception" : "format_exception_only"); - if (!format_exception_func) { - BT_LOGE_STR("Failed to log Python exception (could not find format_exception)."); - goto end; - } - - if (!PyCallable_Check(format_exception_func)) { - BT_LOGE_STR("Failed to log Python exception (format_exception is not callable)."); - goto end; - } - - exc_str_list = PyObject_CallFunctionObjArgs(format_exception_func, type, value, traceback, NULL); - if (!exc_str_list) { - PyErr_Print(); - BT_LOGE_STR("Failed to log Python exception (call to format_exception failed)."); - goto end; - } - - msg_buf = g_string_new(NULL); - - for (i = 0; i < PyList_Size(exc_str_list); i++) { - PyObject *exc_str = PyList_GetItem(exc_str_list, i); - const char *str = PyUnicode_AsUTF8(exc_str); - if (!str) { - BT_LOGE_STR("Failed to log Python exception (failed to convert exception to string)."); - goto end; - } - - g_string_append(msg_buf, str); - } - - BT_LOGE_STR(msg_buf->str); - -end: - if (msg_buf) { - g_string_free(msg_buf, TRUE); - } - Py_XDECREF(exc_str_list); - Py_XDECREF(format_exception_func); - Py_XDECREF(traceback_module); - - /* PyErr_Restore takes our references. */ - PyErr_Restore(type, value, traceback); -} - -static bt_self_component_status bt_py3_exc_to_self_component_status(void) -{ - bt_self_component_status status = BT_SELF_COMPONENT_STATUS_OK; - PyObject *exc = PyErr_Occurred(); - - if (!exc) { - goto end; - } - - if (PyErr_GivenExceptionMatches(exc, - py_mod_bt2_exc_try_again_type)) { - status = BT_SELF_COMPONENT_STATUS_AGAIN; - } else if (PyErr_GivenExceptionMatches(exc, - py_mod_bt2_exc_stop_type)) { - status = BT_SELF_COMPONENT_STATUS_END; - } else { - bt2_py_loge_exception(); - status = BT_SELF_COMPONENT_STATUS_ERROR; - } - -end: - PyErr_Clear(); - return status; -} - -/* Component class proxy methods (delegate to the attached Python object) */ - -static bt_self_message_iterator_status -bt_py3_exc_to_self_message_iterator_status(void) -{ - enum bt_self_message_iterator_status status = - BT_SELF_MESSAGE_ITERATOR_STATUS_OK; - PyObject *exc = PyErr_Occurred(); - - if (!exc) { - goto end; - } - - if (PyErr_GivenExceptionMatches(exc, py_mod_bt2_exc_stop_type)) { - status = BT_SELF_MESSAGE_ITERATOR_STATUS_END; - } else if (PyErr_GivenExceptionMatches(exc, py_mod_bt2_exc_try_again_type)) { - status = BT_SELF_MESSAGE_ITERATOR_STATUS_AGAIN; - } else { - bt2_py_loge_exception(); - status = BT_SELF_MESSAGE_ITERATOR_STATUS_ERROR; - } - -end: - PyErr_Clear(); - return status; -} - -static enum bt_query_status bt_py3_exc_to_query_status(void) -{ - enum bt_query_status status = BT_QUERY_STATUS_OK; - PyObject *exc = PyErr_Occurred(); - - if (!exc) { - goto end; - } - - if (PyErr_GivenExceptionMatches(exc, - py_mod_bt2_exc_invalid_query_object_type)) { - status = BT_QUERY_STATUS_INVALID_OBJECT; - } else if (PyErr_GivenExceptionMatches(exc, - py_mod_bt2_exc_invalid_query_params_type)) { - status = BT_QUERY_STATUS_INVALID_PARAMS; - } else if (PyErr_GivenExceptionMatches(exc, - py_mod_bt2_exc_try_again_type)) { - status = BT_QUERY_STATUS_AGAIN; - } else { - bt2_py_loge_exception(); - status = BT_QUERY_STATUS_ERROR; - } - -end: - PyErr_Clear(); - return status; -} - -static bt_self_component_status -bt_py3_component_class_init( - bt_self_component *self_component, - void *self_component_v, - swig_type_info *self_comp_cls_type_swig_type, - const bt_value *params, - void *init_method_data) -{ - const bt_component *component = bt_self_component_as_component(self_component); - const bt_component_class *component_class = bt_component_borrow_class_const(component); - bt_self_component_status status = BT_SELF_COMPONENT_STATUS_OK; - PyObject *py_cls = NULL; - PyObject *py_comp = NULL; - PyObject *py_params_ptr = NULL; - PyObject *py_comp_ptr = NULL; - - (void) init_method_data; - - BT_ASSERT(self_component); - BT_ASSERT(self_component_v); - BT_ASSERT(self_comp_cls_type_swig_type); - - /* - * Get the user-defined Python class which created this - * component's class in the first place (borrowed - * reference). - */ - py_cls = lookup_cc_ptr_to_py_cls(component_class); - if (!py_cls) { - BT_LOGE("Cannot find Python class associated to native component class: " - "comp-cls-addr=%p", component_class); - goto error; - } - - /* Parameters pointer -> SWIG pointer Python object */ - py_params_ptr = SWIG_NewPointerObj(SWIG_as_voidptr(params), - SWIGTYPE_p_bt_value, 0); - if (!py_params_ptr) { - BT_LOGE_STR("Failed to create a SWIG pointer object."); - goto error; - } - - py_comp_ptr = SWIG_NewPointerObj(SWIG_as_voidptr(self_component_v), - self_comp_cls_type_swig_type, 0); - if (!py_comp_ptr) { - BT_LOGE_STR("Failed to create a SWIG pointer object."); - goto error; - } - - /* - * Do the equivalent of this: - * - * py_comp = py_cls._init_from_native(py_comp_ptr, py_params_ptr) - * - * _UserComponentType._init_from_native() calls the Python - * component object's __init__() function. - */ - py_comp = PyObject_CallMethod(py_cls, - "_init_from_native", "(OO)", py_comp_ptr, py_params_ptr); - if (!py_comp) { - bt2_py_loge_exception(); - BT_LOGE("Failed to call Python class's _init_from_native() method: " - "py-cls-addr=%p", py_cls); - - goto error; - } - - /* - * Our user Python component object is now fully created and - * initialized by the user. Since we just created it, this - * native component is its only (persistent) owner. - */ - bt_self_component_set_data(self_component, py_comp); - py_comp = NULL; - goto end; - -error: - status = BT_SELF_COMPONENT_STATUS_ERROR; - - /* - * Clear any exception: we're returning a bad status anyway. If - * this call originated from Python (creation from a plugin's - * component class, for example), then the user gets an - * appropriate creation error. - */ - PyErr_Clear(); - -end: - Py_XDECREF(py_comp); - Py_XDECREF(py_params_ptr); - Py_XDECREF(py_comp_ptr); - return status; -} - -/* - * Method of bt_component_class_source to initialize a bt_self_component_source - * of that class. - */ - -static bt_self_component_status -bt_py3_component_class_source_init(bt_self_component_source *self_component_source, - const bt_value *params, void *init_method_data) -{ - bt_self_component *self_component = bt_self_component_source_as_self_component(self_component_source); - return bt_py3_component_class_init( - self_component, - self_component_source, - SWIGTYPE_p_bt_self_component_source, - params, init_method_data); -} - -static bt_self_component_status -bt_py3_component_class_filter_init(bt_self_component_filter *self_component_filter, - const bt_value *params, void *init_method_data) -{ - bt_self_component *self_component = bt_self_component_filter_as_self_component(self_component_filter); - return bt_py3_component_class_init( - self_component, - self_component_filter, - SWIGTYPE_p_bt_self_component_filter, - params, init_method_data); -} - -static bt_self_component_status -bt_py3_component_class_sink_init(bt_self_component_sink *self_component_sink, - const bt_value *params, void *init_method_data) -{ - bt_self_component *self_component = bt_self_component_sink_as_self_component(self_component_sink); - return bt_py3_component_class_init( - self_component, - self_component_sink, - SWIGTYPE_p_bt_self_component_sink, - params, init_method_data); -} - -static void bt_py3_component_class_finalize(bt_self_component *self_component) -{ - PyObject *py_comp = bt_self_component_get_data(self_component); - BT_ASSERT(py_comp); - - /* Call user's _finalize() method */ - PyObject *py_method_result = PyObject_CallMethod(py_comp, - "_finalize", NULL); - - if (PyErr_Occurred()) { - BT_LOGW("User's _finalize() method raised an exception: ignoring."); - } - - /* - * Ignore any exception raised by the _finalize() method because - * it won't change anything at this point: the component is - * being destroyed anyway. - */ - PyErr_Clear(); - Py_XDECREF(py_method_result); - Py_DECREF(py_comp); -} - -static void -bt_py3_component_class_source_finalize(bt_self_component_source *self_component_source) -{ - bt_self_component *self_component = bt_self_component_source_as_self_component(self_component_source); - bt_py3_component_class_finalize(self_component); -} - -static void -bt_py3_component_class_filter_finalize(bt_self_component_filter *self_component_filter) -{ - bt_self_component *self_component = bt_self_component_filter_as_self_component(self_component_filter); - bt_py3_component_class_finalize(self_component); -} - -static void -bt_py3_component_class_sink_finalize(bt_self_component_sink *self_component_sink) -{ - bt_self_component *self_component = bt_self_component_sink_as_self_component(self_component_sink); - bt_py3_component_class_finalize(self_component); -} - -static bt_self_component_status -bt_py3_component_class_port_connected( - bt_self_component *self_component, - void *self_component_port, - swig_type_info *self_component_port_swig_type, - bt_port_type self_component_port_type, - const void *other_port, - swig_type_info *other_port_swig_type) -{ - bt_self_component_status status; - PyObject *py_comp = NULL; - PyObject *py_self_port_ptr = NULL; - PyObject *py_other_port_ptr = NULL; - PyObject *py_method_result = NULL; - - py_comp = bt_self_component_get_data(self_component); - BT_ASSERT(py_comp); - - py_self_port_ptr = SWIG_NewPointerObj(SWIG_as_voidptr(self_component_port), - self_component_port_swig_type, 0); - if (!py_self_port_ptr) { - BT_LOGF_STR("Failed to create a SWIG pointer object."); - status = BT_SELF_COMPONENT_STATUS_NOMEM; - goto end; - } - - py_other_port_ptr = SWIG_NewPointerObj(SWIG_as_voidptr(other_port), - other_port_swig_type, 0); - if (!py_other_port_ptr) { - BT_LOGF_STR("Failed to create a SWIG pointer object."); - status = BT_SELF_COMPONENT_STATUS_NOMEM; - goto end; } - - py_method_result = PyObject_CallMethod(py_comp, - "_port_connected_from_native", "(OiO)", py_self_port_ptr, - self_component_port_type, py_other_port_ptr); - - BT_ASSERT(!py_method_result || py_method_result == Py_None); - - status = bt_py3_exc_to_self_component_status(); - -end: - Py_XDECREF(py_self_port_ptr); - Py_XDECREF(py_other_port_ptr); - Py_XDECREF(py_method_result); - - return status; -} - -static bt_self_component_status -bt_py3_component_class_source_output_port_connected( - bt_self_component_source *self_component_source, - bt_self_component_port_output *self_component_port_output, - const bt_port_input *other_port_input) -{ - bt_self_component *self_component = bt_self_component_source_as_self_component(self_component_source); - - return bt_py3_component_class_port_connected( - self_component, - self_component_port_output, - SWIGTYPE_p_bt_self_component_port_output, - BT_PORT_TYPE_OUTPUT, - other_port_input, - SWIGTYPE_p_bt_port_input); -} - -static bt_self_component_status -bt_py3_component_class_filter_input_port_connected( - bt_self_component_filter *self_component_filter, - bt_self_component_port_input *self_component_port_input, - const bt_port_output *other_port_output) -{ - bt_self_component *self_component = bt_self_component_filter_as_self_component(self_component_filter); - - return bt_py3_component_class_port_connected( - self_component, - self_component_port_input, - SWIGTYPE_p_bt_self_component_port_input, - BT_PORT_TYPE_INPUT, - other_port_output, - SWIGTYPE_p_bt_port_output); -} - -static bt_self_component_status -bt_py3_component_class_filter_output_port_connected( - bt_self_component_filter *self_component_filter, - bt_self_component_port_output *self_component_port_output, - const bt_port_input *other_port_input) -{ - bt_self_component *self_component = bt_self_component_filter_as_self_component(self_component_filter); - - return bt_py3_component_class_port_connected( - self_component, - self_component_port_output, - SWIGTYPE_p_bt_self_component_port_output, - BT_PORT_TYPE_OUTPUT, - other_port_input, - SWIGTYPE_p_bt_port_input); -} - -static bt_self_component_status -bt_py3_component_class_sink_input_port_connected( - bt_self_component_sink *self_component_sink, - bt_self_component_port_input *self_component_port_input, - const bt_port_output *other_port_output) -{ - bt_self_component *self_component = bt_self_component_sink_as_self_component(self_component_sink); - - return bt_py3_component_class_port_connected( - self_component, - self_component_port_input, - SWIGTYPE_p_bt_self_component_port_input, - BT_PORT_TYPE_INPUT, - other_port_output, - SWIGTYPE_p_bt_port_output); -} - -static bt_self_component_status -bt_py3_component_class_sink_graph_is_configured(bt_self_component_sink *self_component_sink) -{ - PyObject *py_comp = NULL; - PyObject *py_method_result = NULL; - bt_self_component_status status = BT_SELF_COMPONENT_STATUS_OK; - bt_self_component *self_component = bt_self_component_sink_as_self_component(self_component_sink); - - py_comp = bt_self_component_get_data(self_component); - py_method_result = PyObject_CallMethod(py_comp, - "_graph_is_configured_from_native", NULL); - - BT_ASSERT(!py_method_result || py_method_result == Py_None); - - status = bt_py3_exc_to_self_component_status(); - - Py_XDECREF(py_method_result); - - return status; -} - -static bt_query_status -bt_py3_component_class_query( - const bt_component_class *component_class, - const bt_query_executor *query_executor, - const char *object, const bt_value *params, - bt_logging_level log_level, - const bt_value **result) -{ - PyObject *py_cls = NULL; - PyObject *py_params_ptr = NULL; - PyObject *py_query_exec_ptr = NULL; - PyObject *py_query_func = NULL; - PyObject *py_object = NULL; - PyObject *py_results_addr = NULL; - bt_query_status status = BT_QUERY_STATUS_OK; - - py_cls = lookup_cc_ptr_to_py_cls(component_class); - if (!py_cls) { - BT_LOGE("Cannot find Python class associated to native component class: " - "comp-cls-addr=%p", component_class); - goto error; - } - - py_params_ptr = SWIG_NewPointerObj(SWIG_as_voidptr(params), - SWIGTYPE_p_bt_value, 0); - if (!py_params_ptr) { - BT_LOGE_STR("Failed to create a SWIG pointer object."); - goto error; - } - - py_query_exec_ptr = SWIG_NewPointerObj(SWIG_as_voidptr(query_executor), - SWIGTYPE_p_bt_query_executor, 0); - if (!py_query_exec_ptr) { - BT_LOGE_STR("Failed to create a SWIG pointer object."); - goto error; - } - - py_object = SWIG_FromCharPtr(object); - if (!py_object) { - BT_LOGE_STR("Failed to create a Python string."); - goto error; - } - - py_results_addr = PyObject_CallMethod(py_cls, - "_query_from_native", "(OOOi)", py_query_exec_ptr, - py_object, py_params_ptr, (int) log_level); - - if (!py_results_addr) { - BT_LOGE("Failed to call Python class's _query_from_native() method: " - "py-cls-addr=%p", py_cls); - status = bt_py3_exc_to_query_status(); - goto end; - } - - /* - * The returned object, on success, is an integer object - * (PyLong) containing the address of a BT value object (new - * reference). - */ - *result = PyLong_AsVoidPtr(py_results_addr); - BT_ASSERT(!PyErr_Occurred()); - BT_ASSERT(*result); - goto end; - -error: - PyErr_Clear(); - status = BT_QUERY_STATUS_ERROR; - -end: - Py_XDECREF(py_params_ptr); - Py_XDECREF(py_query_exec_ptr); - Py_XDECREF(py_query_func); - Py_XDECREF(py_object); - Py_XDECREF(py_results_addr); - return status; -} - -static bt_query_status -bt_py3_component_class_source_query( - bt_self_component_class_source *self_component_class_source, - const bt_query_executor *query_executor, - const char *object, const bt_value *params, - bt_logging_level log_level, - const bt_value **result) -{ - const bt_component_class_source *component_class_source = bt_self_component_class_source_as_component_class_source(self_component_class_source); - const bt_component_class *component_class = bt_component_class_source_as_component_class_const(component_class_source); - return bt_py3_component_class_query(component_class, query_executor, object, params, log_level, result); -} - -static bt_query_status -bt_py3_component_class_filter_query( - bt_self_component_class_filter *self_component_class_filter, - const bt_query_executor *query_executor, - const char *object, const bt_value *params, - bt_logging_level log_level, - const bt_value **result) -{ - const bt_component_class_filter *component_class_filter = bt_self_component_class_filter_as_component_class_filter(self_component_class_filter); - const bt_component_class *component_class = bt_component_class_filter_as_component_class_const(component_class_filter); - return bt_py3_component_class_query(component_class, query_executor, object, params, log_level, result); -} - -static bt_query_status -bt_py3_component_class_sink_query( - bt_self_component_class_sink *self_component_class_sink, - const bt_query_executor *query_executor, - const char *object, const bt_value *params, - bt_logging_level log_level, - const bt_value **result) -{ - const bt_component_class_sink *component_class_sink = bt_self_component_class_sink_as_component_class_sink(self_component_class_sink); - const bt_component_class *component_class = bt_component_class_sink_as_component_class_const(component_class_sink); - return bt_py3_component_class_query(component_class, query_executor, object, params, log_level, result); -} - -static bt_self_message_iterator_status -bt_py3_component_class_message_iterator_init( - bt_self_message_iterator *self_message_iterator, - bt_self_component *self_component, - bt_self_component_port_output *self_component_port_output) -{ - bt_self_message_iterator_status status = BT_SELF_MESSAGE_ITERATOR_STATUS_OK; - PyObject *py_comp_cls = NULL; - PyObject *py_iter_cls = NULL; - PyObject *py_iter_ptr = NULL; - PyObject *py_component_port_output_ptr = NULL; - PyObject *py_init_method_result = NULL; - PyObject *py_iter = NULL; - PyObject *py_comp; - - py_comp = bt_self_component_get_data(self_component); - - /* Find user's Python message iterator class */ - py_comp_cls = PyObject_GetAttrString(py_comp, "__class__"); - if (!py_comp_cls) { - BT_LOGE_STR("Cannot get Python object's `__class__` attribute."); - goto error; - } - - py_iter_cls = PyObject_GetAttrString(py_comp_cls, "_iter_cls"); - if (!py_iter_cls) { - BT_LOGE_STR("Cannot get Python class's `_iter_cls` attribute."); - goto error; - } - - py_iter_ptr = SWIG_NewPointerObj(SWIG_as_voidptr(self_message_iterator), - SWIGTYPE_p_bt_self_message_iterator, 0); - if (!py_iter_ptr) { - BT_LOGE_STR("Failed to create a SWIG pointer object."); - goto error; - } - - /* - * Create object with borrowed native message iterator - * reference: - * - * py_iter = py_iter_cls.__new__(py_iter_cls, py_iter_ptr) - */ - py_iter = PyObject_CallMethod(py_iter_cls, "__new__", - "(OO)", py_iter_cls, py_iter_ptr); - if (!py_iter) { - BT_LOGE("Failed to call Python class's __new__() method: " - "py-cls-addr=%p", py_iter_cls); - bt2_py_loge_exception(); - goto error; - } - - /* - * Initialize object: - * - * py_iter.__init__(self_output_port) - * - * through the _init_for_native helper static method. - * - * At this point, py_iter._ptr is set, so this initialization - * function has access to self._component (which gives it the - * user Python component object from which the iterator was - * created). - */ - py_component_port_output_ptr = SWIG_NewPointerObj(SWIG_as_voidptr(self_component_port_output), - SWIGTYPE_p_bt_self_component_port_output, 0); - if (!py_component_port_output_ptr) { - BT_LOGE_STR("Failed to create a SWIG pointer object."); - goto error; - } - - py_init_method_result = PyObject_CallMethod(py_iter, "_init_from_native", "O", py_component_port_output_ptr); - if (!py_init_method_result) { - BT_LOGE_STR("User's __init__() method failed."); - bt2_py_loge_exception(); - goto error; - } - - /* - * Since the Python code can never instantiate a user-defined - * message iterator class, the native message iterator - * object does NOT belong to a user Python message iterator - * object (borrowed reference). However this Python object is - * owned by this native message iterator object. - * - * In the Python world, the lifetime of the native message - * iterator is managed by a _GenericMessageIterator - * instance: - * - * _GenericMessageIterator instance: - * owns a native bt_message_iterator object (iter) - * owns a _UserMessageIterator instance (py_iter) - * self._ptr is a borrowed reference to the - * native bt_private_connection_private_message_iterator - * object (iter) - */ - bt_self_message_iterator_set_data(self_message_iterator, py_iter); - py_iter = NULL; - goto end; - -error: - status = bt_py3_exc_to_self_message_iterator_status(); - if (status == BT_SELF_MESSAGE_ITERATOR_STATUS_OK) { - /* - * Looks like there wasn't any exception from the Python - * side, but we're still in an error state here. - */ - status = BT_SELF_MESSAGE_ITERATOR_STATUS_ERROR; - } - - /* - * Clear any exception: we're returning a bad status anyway. If - * this call originated from Python, then the user gets an - * appropriate creation error. - */ - PyErr_Clear(); - -end: - Py_XDECREF(py_comp_cls); - Py_XDECREF(py_iter_cls); - Py_XDECREF(py_iter_ptr); - Py_XDECREF(py_component_port_output_ptr); - Py_XDECREF(py_init_method_result); - Py_XDECREF(py_iter); - return status; -} - -static bt_self_message_iterator_status -bt_py3_component_class_source_message_iterator_init( - bt_self_message_iterator *self_message_iterator, - bt_self_component_source *self_component_source, - bt_self_component_port_output *self_component_port_output) -{ - bt_self_component *self_component = bt_self_component_source_as_self_component(self_component_source); - return bt_py3_component_class_message_iterator_init(self_message_iterator, self_component, self_component_port_output); -} - -static bt_self_message_iterator_status -bt_py3_component_class_filter_message_iterator_init( - bt_self_message_iterator *self_message_iterator, - bt_self_component_filter *self_component_filter, - bt_self_component_port_output *self_component_port_output) -{ - bt_self_component *self_component = bt_self_component_filter_as_self_component(self_component_filter); - return bt_py3_component_class_message_iterator_init(self_message_iterator, self_component, self_component_port_output); -} - -static void -bt_py3_component_class_message_iterator_finalize( - bt_self_message_iterator *message_iterator) -{ - PyObject *py_message_iter = bt_self_message_iterator_get_data(message_iterator); - PyObject *py_method_result = NULL; - - BT_ASSERT(py_message_iter); - - /* Call user's _finalize() method */ - py_method_result = PyObject_CallMethod(py_message_iter, - "_finalize", NULL); - - if (PyErr_Occurred()) { - BT_LOGW("User's _finalize() method raised an exception: ignoring."); - } - - /* - * Ignore any exception raised by the _finalize() method because - * it won't change anything at this point: the component is - * being destroyed anyway. - */ - PyErr_Clear(); - Py_XDECREF(py_method_result); - Py_DECREF(py_message_iter); -} - -/* Valid for both sources and filters. */ - -static bt_self_message_iterator_status -bt_py3_component_class_message_iterator_next( - bt_self_message_iterator *message_iterator, - bt_message_array_const msgs, uint64_t capacity, - uint64_t *count) -{ - bt_self_message_iterator_status status = BT_SELF_MESSAGE_ITERATOR_STATUS_OK; - PyObject *py_message_iter = bt_self_message_iterator_get_data(message_iterator); - PyObject *py_method_result = NULL; - - BT_ASSERT(py_message_iter); - py_method_result = PyObject_CallMethod(py_message_iter, - "_next_from_native", NULL); - if (!py_method_result) { - status = bt_py3_exc_to_self_message_iterator_status(); - BT_ASSERT(status != BT_SELF_MESSAGE_ITERATOR_STATUS_OK); - goto end; - } - - /* - * The returned object, on success, is an integer object - * (PyLong) containing the address of a native message - * object (which is now ours). - */ - msgs[0] = PyLong_AsVoidPtr(py_method_result); - *count = 1; - - /* Clear potential overflow error; should never happen */ - BT_ASSERT(!PyErr_Occurred()); - goto end; - -end: - Py_XDECREF(py_method_result); - return status; -} - -static bt_self_component_status -bt_py3_component_class_sink_consume(bt_self_component_sink *self_component_sink) -{ - bt_self_component *self_component = bt_self_component_sink_as_self_component(self_component_sink); - PyObject *py_comp = bt_self_component_get_data(self_component); - PyObject *py_method_result = NULL; - bt_self_component_status status; - - BT_ASSERT(py_comp); - py_method_result = PyObject_CallMethod(py_comp, - "_consume", NULL); - - status = bt_py3_exc_to_self_component_status(); - if (!py_method_result && status == BT_SELF_COMPONENT_STATUS_OK) { - /* Pretty sure this should never happen, but just in case */ - BT_LOGE("User's _consume() method failed without raising an exception: " - "status=%d", status); - status = BT_SELF_COMPONENT_STATUS_ERROR; - } - - Py_XDECREF(py_method_result); - return status; -} - -static -int bt_py3_component_class_set_help_and_desc( - bt_component_class *component_class, - const char *description, const char *help) -{ - int ret; - - if (description) { - ret = bt_component_class_set_description(component_class, description); - if (ret) { - BT_LOGE("Cannot set component class's description: " - "comp-cls-addr=%p", component_class); - goto end; - } - } - - if (help) { - ret = bt_component_class_set_help(component_class, help); - if (ret) { - BT_LOGE("Cannot set component class's help text: " - "comp-cls-addr=%p", component_class); - goto end; - } - } - - ret = 0; - -end: - return ret; -} - -static -bt_component_class_source *bt_py3_component_class_source_create( - PyObject *py_cls, const char *name, const char *description, - const char *help) -{ - bt_component_class_source *component_class_source; - bt_component_class *component_class; - int ret; - - BT_ASSERT(py_cls); - - component_class_source = bt_component_class_source_create(name, - bt_py3_component_class_message_iterator_next); - if (!component_class_source) { - BT_LOGE_STR("Cannot create source component class."); - goto end; - } - - component_class = bt_component_class_source_as_component_class(component_class_source); - - if (bt_py3_component_class_set_help_and_desc(component_class, description, help)) { - goto end; - } - - ret = bt_component_class_source_set_init_method(component_class_source, bt_py3_component_class_source_init); - BT_ASSERT(ret == 0); - ret = bt_component_class_source_set_finalize_method (component_class_source, bt_py3_component_class_source_finalize); - BT_ASSERT(ret == 0); - ret = bt_component_class_source_set_output_port_connected_method(component_class_source, - bt_py3_component_class_source_output_port_connected); - BT_ASSERT(ret == 0); - ret = bt_component_class_source_set_query_method(component_class_source, bt_py3_component_class_source_query); - BT_ASSERT(ret == 0); - ret = bt_component_class_source_set_message_iterator_init_method( - component_class_source, bt_py3_component_class_source_message_iterator_init); - BT_ASSERT(ret == 0); - ret = bt_component_class_source_set_message_iterator_finalize_method( - component_class_source, bt_py3_component_class_message_iterator_finalize); - BT_ASSERT(ret == 0); - - register_cc_ptr_to_py_cls(component_class, py_cls); - -end: - return component_class_source; -} - -static -bt_component_class_filter *bt_py3_component_class_filter_create( - PyObject *py_cls, const char *name, const char *description, - const char *help) -{ - bt_component_class *component_class; - bt_component_class_filter *component_class_filter; - int ret; - - BT_ASSERT(py_cls); - - component_class_filter = bt_component_class_filter_create(name, - bt_py3_component_class_message_iterator_next); - if (!component_class_filter) { - BT_LOGE_STR("Cannot create filter component class."); - goto end; - } - - component_class = bt_component_class_filter_as_component_class(component_class_filter); - - if (bt_py3_component_class_set_help_and_desc(component_class, description, help)) { - goto end; - } - - ret = bt_component_class_filter_set_init_method(component_class_filter, bt_py3_component_class_filter_init); - BT_ASSERT(ret == 0); - ret = bt_component_class_filter_set_finalize_method (component_class_filter, bt_py3_component_class_filter_finalize); - BT_ASSERT(ret == 0); - ret = bt_component_class_filter_set_input_port_connected_method(component_class_filter, - bt_py3_component_class_filter_input_port_connected); - BT_ASSERT(ret == 0); - ret = bt_component_class_filter_set_output_port_connected_method(component_class_filter, - bt_py3_component_class_filter_output_port_connected); - BT_ASSERT(ret == 0); - ret = bt_component_class_filter_set_query_method(component_class_filter, bt_py3_component_class_filter_query); - BT_ASSERT(ret == 0); - ret = bt_component_class_filter_set_message_iterator_init_method( - component_class_filter, bt_py3_component_class_filter_message_iterator_init); - BT_ASSERT(ret == 0); - ret = bt_component_class_filter_set_message_iterator_finalize_method( - component_class_filter, bt_py3_component_class_message_iterator_finalize); - BT_ASSERT(ret == 0); - - register_cc_ptr_to_py_cls(component_class, py_cls); - -end: - return component_class_filter; -} - -static -bt_component_class_sink *bt_py3_component_class_sink_create( - PyObject *py_cls, const char *name, const char *description, - const char *help) -{ - bt_component_class_sink *component_class_sink; - bt_component_class *component_class; - int ret; - - BT_ASSERT(py_cls); - - component_class_sink = bt_component_class_sink_create(name, bt_py3_component_class_sink_consume); - - if (!component_class_sink) { - BT_LOGE_STR("Cannot create sink component class."); - goto end; - } - - component_class = bt_component_class_sink_as_component_class(component_class_sink); - - if (bt_py3_component_class_set_help_and_desc(component_class, description, help)) { - goto end; - } - - ret = bt_component_class_sink_set_init_method(component_class_sink, bt_py3_component_class_sink_init); - BT_ASSERT(ret == 0); - ret = bt_component_class_sink_set_finalize_method(component_class_sink, bt_py3_component_class_sink_finalize); - BT_ASSERT(ret == 0); - ret = bt_component_class_sink_set_input_port_connected_method(component_class_sink, - bt_py3_component_class_sink_input_port_connected); - BT_ASSERT(ret == 0); - ret = bt_component_class_sink_set_graph_is_configured_method(component_class_sink, - bt_py3_component_class_sink_graph_is_configured); - BT_ASSERT(ret == 0); - ret = bt_component_class_sink_set_query_method(component_class_sink, bt_py3_component_class_sink_query); - BT_ASSERT(ret == 0); - - register_cc_ptr_to_py_cls(component_class, py_cls); - -end: - return component_class_sink; -} +#include "native_bt_component_class.i.h" %} -struct bt_component_class_source *bt_py3_component_class_source_create( +struct bt_component_class_source *bt_bt2_component_class_source_create( PyObject *py_cls, const char *name, const char *description, const char *help); -struct bt_component_class_filter *bt_py3_component_class_filter_create( +struct bt_component_class_filter *bt_bt2_component_class_filter_create( PyObject *py_cls, const char *name, const char *description, const char *help); -struct bt_component_class_sink *bt_py3_component_class_sink_create( +struct bt_component_class_sink *bt_bt2_component_class_sink_create( PyObject *py_cls, const char *name, const char *description, const char *help); -void bt_py3_cc_init_from_bt2(void); -void bt_py3_cc_exit_handler(void); +void bt_bt2_unregister_cc_ptr_to_py_cls(const bt_component_class *comp_cls); +bool bt_bt2_is_python_component_class(const bt_component_class *comp_cls);