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/******************************************************************************
*
* Copyright (C) 2009-2012 Broadcom Corporation
*
* Licensed 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.
*
******************************************************************************/
/*******************************************************************************
*
* Filename: btif_profile_queue.c
*
* Description: Bluetooth remote device connection queuing implementation.
*
******************************************************************************/
#include <hardware/bluetooth.h>
#define LOG_TAG "BTIF_QUEUE"
#include "btif_common.h"
#include "btif_profile_queue.h"
#include "gki.h"
/*******************************************************************************
** Local type definitions
*******************************************************************************/
typedef enum {
BTIF_QUEUE_CONNECT_EVT,
BTIF_QUEUE_ADVANCE_EVT
} btif_queue_event_t;
typedef struct connect_node_tag
{
bt_bdaddr_t bda;
uint16_t uuid;
uint16_t busy;
void *p_cb;
struct connect_node_tag *p_next;
} __attribute__((packed))connect_node_t;
/*******************************************************************************
** Static variables
*******************************************************************************/
static connect_node_t *connect_queue;
/*******************************************************************************
** Queue helper functions
*******************************************************************************/
static void queue_int_add(connect_node_t *p_param)
{
connect_node_t *p_list = connect_queue;
connect_node_t *p_node = GKI_getbuf(sizeof(connect_node_t));
ASSERTC(p_node != NULL, "Failed to allocate new list node", 0);
memcpy(p_node, p_param, sizeof(connect_node_t));
if (connect_queue == NULL)
{
connect_queue = p_node;
return;
}
while (p_list->p_next)
p_list = p_list->p_next;
p_list->p_next = p_node;
}
static void queue_int_advance()
{
connect_node_t *p_head = connect_queue;
if (connect_queue == NULL)
return;
connect_queue = connect_queue->p_next;
GKI_freebuf(p_head);
}
static bt_status_t queue_int_connect_next()
{
connect_node_t* p_head = connect_queue;
if (p_head == NULL)
return BT_STATUS_FAIL;
/* If the queue is currently busy, we return success anyway,
* since the connection has been queued... */
if (p_head->busy != FALSE)
return BT_STATUS_SUCCESS;
p_head->busy = TRUE;
return (*(btif_connect_cb_t*)p_head->p_cb)(&p_head->bda);
}
static void queue_int_handle_evt(UINT16 event, char *p_param)
{
switch(event)
{
case BTIF_QUEUE_CONNECT_EVT:
queue_int_add((connect_node_t*)p_param);
break;
case BTIF_QUEUE_ADVANCE_EVT:
queue_int_advance();
break;
}
queue_int_connect_next();
}
/*******************************************************************************
**
** Function btif_queue_connect
**
** Description Add a new connection to the queue and trigger the next
** scheduled connection.
**
** Returns BT_STATUS_SUCCESS if successful
**
*******************************************************************************/
bt_status_t btif_queue_connect(uint16_t uuid, const bt_bdaddr_t *bda,
btif_connect_cb_t *connect_cb)
{
connect_node_t node;
memset(&node, 0, sizeof(connect_node_t));
memcpy(&(node.bda), bda, sizeof(bt_bdaddr_t));
node.uuid = uuid;
node.p_cb = connect_cb;
return btif_transfer_context(queue_int_handle_evt, BTIF_QUEUE_CONNECT_EVT,
(char*)&node, sizeof(connect_node_t), NULL);
}
/*******************************************************************************
**
** Function btif_queue_advance
**
** Description Clear the queue's busy status and advance to the next
** scheduled connection.
**
** Returns void
**
*******************************************************************************/
void btif_queue_advance()
{
btif_transfer_context(queue_int_handle_evt, BTIF_QUEUE_ADVANCE_EVT,
NULL, 0, NULL);
}
/*******************************************************************************
**
** Function btif_queue_release
**
** Description Free up all the queue nodes and set the queue head to NULL
**
** Returns void
**
*******************************************************************************/
void btif_queue_release()
{
connect_node_t *current = connect_queue;
while (current != NULL)
{
connect_node_t *next = current->p_next;
GKI_freebuf(current);
current = next;
}
connect_queue = NULL;
}
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