1 /******************************************************************************
3 * Copyright (C) 2009-2012 Broadcom Corporation
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:
9 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 ******************************************************************************/
19 /*******************************************************************************
21 * Filename: btif_profile_queue.c
23 * Description: Bluetooth remote device connection queuing implementation.
25 ******************************************************************************/
29 #include <hardware/bluetooth.h>
32 #define LOG_TAG "bt_btif_queue"
33 #include "btif_common.h"
34 #include "btif_profile_queue.h"
36 #include "osi/include/list.h"
37 #include "osi/include/allocator.h"
38 #include "stack_manager.h"
40 /*******************************************************************************
41 ** Local type definitions
42 *******************************************************************************/
45 BTIF_QUEUE_CONNECT_EVT,
46 BTIF_QUEUE_ADVANCE_EVT,
53 btif_connect_cb_t connect_cb;
56 /*******************************************************************************
58 *******************************************************************************/
60 static list_t *connect_queue;
62 static const size_t MAX_REASONABLE_REQUESTS = 10;
64 /*******************************************************************************
65 ** Queue helper functions
66 *******************************************************************************/
68 static void queue_int_add(connect_node_t *p_param) {
70 connect_queue = list_new(osi_free);
71 assert(connect_queue != NULL);
74 // Sanity check to make sure we're not leaking connection requests
75 assert(list_length(connect_queue) < MAX_REASONABLE_REQUESTS);
77 for (const list_node_t *node = list_begin(connect_queue); node != list_end(connect_queue); node = list_next(node)) {
78 if (((connect_node_t *)list_node(node))->uuid == p_param->uuid) {
79 LOG_INFO("%s dropping duplicate connect request for uuid: %04x", __func__, p_param->uuid);
84 connect_node_t *p_node = osi_malloc(sizeof(connect_node_t));
85 assert(p_node != NULL);
86 memcpy(p_node, p_param, sizeof(connect_node_t));
87 list_append(connect_queue, p_node);
90 static void queue_int_advance() {
91 if (connect_queue && !list_is_empty(connect_queue))
92 list_remove(connect_queue, list_front(connect_queue));
95 static void queue_int_handle_evt(UINT16 event, char *p_param) {
97 case BTIF_QUEUE_CONNECT_EVT:
98 queue_int_add((connect_node_t *)p_param);
101 case BTIF_QUEUE_ADVANCE_EVT:
106 if (stack_manager_get_interface()->get_stack_is_running())
107 btif_queue_connect_next();
110 /*******************************************************************************
112 ** Function btif_queue_connect
114 ** Description Add a new connection to the queue and trigger the next
115 ** scheduled connection.
117 ** Returns BT_STATUS_SUCCESS if successful
119 *******************************************************************************/
120 bt_status_t btif_queue_connect(uint16_t uuid, const bt_bdaddr_t *bda, btif_connect_cb_t connect_cb) {
122 memset(&node, 0, sizeof(connect_node_t));
123 memcpy(&node.bda, bda, sizeof(bt_bdaddr_t));
125 node.connect_cb = connect_cb;
127 return btif_transfer_context(queue_int_handle_evt, BTIF_QUEUE_CONNECT_EVT,
128 (char *)&node, sizeof(connect_node_t), NULL);
131 /*******************************************************************************
133 ** Function btif_queue_advance
135 ** Description Clear the queue's busy status and advance to the next
136 ** scheduled connection.
140 *******************************************************************************/
141 void btif_queue_advance() {
142 btif_transfer_context(queue_int_handle_evt, BTIF_QUEUE_ADVANCE_EVT,
146 // This function dispatches the next pending connect request. It is called from
147 // stack_manager when the stack comes up.
148 bt_status_t btif_queue_connect_next(void) {
149 if (!connect_queue || list_is_empty(connect_queue))
150 return BT_STATUS_FAIL;
152 connect_node_t *p_head = list_front(connect_queue);
154 // If the queue is currently busy, we return success anyway,
155 // since the connection has been queued...
157 return BT_STATUS_SUCCESS;
160 return p_head->connect_cb(&p_head->bda, p_head->uuid);
164 /*******************************************************************************
166 ** Function btif_queue_release
168 ** Description Free up all the queue nodes and set the queue head to NULL
172 *******************************************************************************/
173 void btif_queue_release() {
174 list_free(connect_queue);
175 connect_queue = NULL;