1 /******************************************************************************
2 *
3 * Copyright (C) 2014 Google, Inc.
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 *
17 ******************************************************************************/
18
19 #define LOG_TAG "bt_osi_data_dispatcher"
20
21 #include "osi/include/data_dispatcher.h"
22
23 #include <assert.h>
24
25 #include "osi/include/allocator.h"
26 #include "osi/include/hash_functions.h"
27 #include "osi/include/hash_map.h"
28 #include "osi/include/osi.h"
29 #include "osi/include/log.h"
30
31 #define DEFAULT_TABLE_BUCKETS 10
32
33 struct data_dispatcher_t {
34 char *name;
35 hash_map_t *dispatch_table;
36 fixed_queue_t *default_queue; // We don't own this queue
37 };
38
data_dispatcher_new(const char * name)39 data_dispatcher_t *data_dispatcher_new(const char *name) {
40 assert(name != NULL);
41
42 data_dispatcher_t *ret = osi_calloc(sizeof(data_dispatcher_t));
43
44 ret->dispatch_table = hash_map_new(DEFAULT_TABLE_BUCKETS, hash_function_naive, NULL, NULL, NULL);
45 if (!ret->dispatch_table) {
46 LOG_ERROR(LOG_TAG, "%s unable to create dispatch table.", __func__);
47 goto error;
48 }
49
50 ret->name = osi_strdup(name);
51 if (!ret->name) {
52 LOG_ERROR(LOG_TAG, "%s unable to duplicate provided name.", __func__);
53 goto error;
54 }
55
56 return ret;
57
58 error:;
59 data_dispatcher_free(ret);
60 return NULL;
61 }
62
data_dispatcher_free(data_dispatcher_t * dispatcher)63 void data_dispatcher_free(data_dispatcher_t *dispatcher) {
64 if (!dispatcher)
65 return;
66
67 hash_map_free(dispatcher->dispatch_table);
68 osi_free(dispatcher->name);
69 osi_free(dispatcher);
70 }
71
data_dispatcher_register(data_dispatcher_t * dispatcher,data_dispatcher_type_t type,fixed_queue_t * queue)72 void data_dispatcher_register(data_dispatcher_t *dispatcher, data_dispatcher_type_t type, fixed_queue_t *queue) {
73 assert(dispatcher != NULL);
74
75 hash_map_erase(dispatcher->dispatch_table, (void *)type);
76 if (queue)
77 hash_map_set(dispatcher->dispatch_table, (void *)type, queue);
78 }
79
data_dispatcher_register_default(data_dispatcher_t * dispatcher,fixed_queue_t * queue)80 void data_dispatcher_register_default(data_dispatcher_t *dispatcher, fixed_queue_t *queue) {
81 assert(dispatcher != NULL);
82
83 dispatcher->default_queue = queue;
84 }
85
data_dispatcher_dispatch(data_dispatcher_t * dispatcher,data_dispatcher_type_t type,void * data)86 bool data_dispatcher_dispatch(data_dispatcher_t *dispatcher, data_dispatcher_type_t type, void *data) {
87 assert(dispatcher != NULL);
88 assert(data != NULL);
89
90 fixed_queue_t *queue = hash_map_get(dispatcher->dispatch_table, (void *)type);
91 if (!queue)
92 queue = dispatcher->default_queue;
93
94 if (queue)
95 fixed_queue_enqueue(queue, data);
96 else
97 LOG_WARN(LOG_TAG, "%s has no handler for type (%zd) in data dispatcher named: %s", __func__, type, dispatcher->name);
98
99 return queue != NULL;
100 }
101