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 <assert.h>
22
23 #include "osi/include/allocator.h"
24 #include "osi/include/data_dispatcher.h"
25 #include "osi/include/hash_functions.h"
26 #include "osi/include/hash_map.h"
27 #include "osi/include/osi.h"
28 #include "osi/include/log.h"
29
30 #define DEFAULT_TABLE_BUCKETS 10
31
32 struct data_dispatcher_t {
33 char *name;
34 hash_map_t *dispatch_table;
35 fixed_queue_t *default_queue; // We don't own this queue
36 };
37
data_dispatcher_new(const char * name)38 data_dispatcher_t *data_dispatcher_new(const char *name) {
39 assert(name != NULL);
40
41 data_dispatcher_t *ret = osi_calloc(sizeof(data_dispatcher_t));
42 if (!ret) {
43 LOG_ERROR("%s unable to allocate memory for new data dispatcher.", __func__);
44 goto error;
45 }
46
47 ret->dispatch_table = hash_map_new(DEFAULT_TABLE_BUCKETS, hash_function_naive, NULL, NULL, NULL);
48 if (!ret->dispatch_table) {
49 LOG_ERROR("%s unable to create dispatch table.", __func__);
50 goto error;
51 }
52
53 ret->name = osi_strdup(name);
54 if (!ret->name) {
55 LOG_ERROR("%s unable to duplicate provided name.", __func__);
56 goto error;
57 }
58
59 return ret;
60
61 error:;
62 data_dispatcher_free(ret);
63 return NULL;
64 }
65
data_dispatcher_free(data_dispatcher_t * dispatcher)66 void data_dispatcher_free(data_dispatcher_t *dispatcher) {
67 if (!dispatcher)
68 return;
69
70 hash_map_free(dispatcher->dispatch_table);
71
72 if (dispatcher->name)
73 osi_free(dispatcher->name);
74
75 osi_free(dispatcher);
76 }
77
data_dispatcher_register(data_dispatcher_t * dispatcher,data_dispatcher_type_t type,fixed_queue_t * queue)78 void data_dispatcher_register(data_dispatcher_t *dispatcher, data_dispatcher_type_t type, fixed_queue_t *queue) {
79 assert(dispatcher != NULL);
80
81 hash_map_erase(dispatcher->dispatch_table, (void *)type);
82 if (queue)
83 hash_map_set(dispatcher->dispatch_table, (void *)type, queue);
84 }
85
data_dispatcher_register_default(data_dispatcher_t * dispatcher,fixed_queue_t * queue)86 void data_dispatcher_register_default(data_dispatcher_t *dispatcher, fixed_queue_t *queue) {
87 assert(dispatcher != NULL);
88
89 dispatcher->default_queue = queue;
90 }
91
data_dispatcher_dispatch(data_dispatcher_t * dispatcher,data_dispatcher_type_t type,void * data)92 bool data_dispatcher_dispatch(data_dispatcher_t *dispatcher, data_dispatcher_type_t type, void *data) {
93 assert(dispatcher != NULL);
94 assert(data != NULL);
95
96 fixed_queue_t *queue = hash_map_get(dispatcher->dispatch_table, (void *)type);
97 if (!queue)
98 queue = dispatcher->default_queue;
99
100 if (queue)
101 fixed_queue_enqueue(queue, data);
102 else
103 LOG_WARN("%s has no handler for type (%zd) in data dispatcher named: %s", __func__, type, dispatcher->name);
104
105 return queue != NULL;
106 }
107