| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include <qpid/dispatch/python_embedded.h> |
| #include <qpid/dispatch/threading.h> |
| #include <qpid/dispatch/ctools.h> |
| #include <structmember.h> |
| #include "entity_cache.h" |
| #include "entity.h" |
| #include "dispatch_private.h" |
| #include "router_private.h" |
| |
| #include <stdbool.h> |
| #include <pthread.h> |
| |
| |
| typedef enum { REMOVE=0, ADD=1 } action_t; |
| |
| typedef struct entity_event_t { |
| DEQ_LINKS(struct entity_event_t); |
| action_t action; |
| const char *type; |
| void *object; |
| } entity_event_t; |
| |
| DEQ_DECLARE(entity_event_t, entity_event_list_t); |
| |
| static entity_event_t *entity_event(action_t action, const char *type, void *object) { |
| entity_event_t *event = NEW(entity_event_t); |
| DEQ_ITEM_INIT(event); |
| event->action = action; |
| event->type = type; |
| event->object = object; |
| return event; |
| } |
| |
| static sys_mutex_t *event_lock = 0; |
| static entity_event_list_t event_list; |
| |
| void qd_entity_cache_initialize(void) { |
| event_lock = sys_mutex(); |
| DEQ_INIT(event_list); |
| } |
| |
| static void push_event(action_t action, const char *type, void *object) { |
| if (!event_lock) return; /* Unit tests don't call qd_entity_cache_initialize */ |
| sys_mutex_lock(event_lock); |
| entity_event_t *event = entity_event(action, type, object); |
| DEQ_INSERT_TAIL(event_list, event); |
| sys_mutex_unlock(event_lock); |
| } |
| |
| void qd_entity_cache_add(const char *type, void *object) { push_event(ADD, type, object); } |
| |
| void qd_entity_cache_remove(const char *type, void *object) { push_event(REMOVE, type, object); } |
| |
| // Get events in the add/remove cache into a python list of (action, type, pointer) |
| // Locks the entity cache so entities can be updated safely (prevent entities from being deleted.) |
| // Do not processs any entities if return error code != 0 |
| // Must call qd_entity_refresh_end when done, regardless of error code. |
| qd_error_t qd_entity_refresh_begin(PyObject *list) { |
| if (!event_lock) return QD_ERROR_NONE; /* Unit tests don't call qd_entity_cache_initialize */ |
| qd_error_clear(); |
| sys_mutex_lock(event_lock); |
| entity_event_t *event = DEQ_HEAD(event_list); |
| while (event) { |
| PyObject *tuple = Py_BuildValue("(isl)", (int)event->action, event->type, (long)event->object); |
| if (!tuple) { qd_error_py(); break; } |
| int err = PyList_Append(list, tuple); |
| Py_DECREF(tuple); |
| if (err) { qd_error_py(); break; } |
| DEQ_REMOVE_HEAD(event_list); |
| free(event); |
| event = DEQ_HEAD(event_list); |
| } |
| return qd_error_code(); |
| } |
| |
| void qd_entity_refresh_end() { |
| sys_mutex_unlock(event_lock); |
| } |