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/******************************************************************************
*
* Copyright (C) 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: bt_utils.cc
*
* Description: Miscellaneous helper functions
*
*
******************************************************************************/
#define LOG_TAG "bt_utils"
#include "bt_utils.h"
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/resource.h>
#include <unistd.h>
#include <mutex>
#define A2DP_RT_PRIORITY 1
#ifndef OS_GENERIC
#include <processgroup/sched_policy.h>
#endif
#include "bt_types.h"
#include "btcore/include/module.h"
#include "osi/include/compat.h"
#include "osi/include/log.h"
#include "osi/include/properties.h"
#define IOT_INFO_REPORT_ENABLE_PROPERTY "persist.vendor.service.bt.iotinfo.report.enable"
/*******************************************************************************
* Type definitions for callback functions
******************************************************************************/
static pthread_once_t g_DoSchedulingGroupOnce[TASK_HIGH_MAX];
static bool g_DoSchedulingGroup[TASK_HIGH_MAX];
static std::mutex gIdxLock;
static int g_TaskIdx;
static int g_TaskIDs[TASK_HIGH_MAX];
#define INVALID_TASK_ID (-1)
static bool iot_info_report_enabled;
static future_t* init(void) {
int i;
char value[PROPERTY_VALUE_MAX] = {0};
for (i = 0; i < TASK_HIGH_MAX; i++) {
g_DoSchedulingGroupOnce[i] = PTHREAD_ONCE_INIT;
g_DoSchedulingGroup[i] = true;
g_TaskIDs[i] = INVALID_TASK_ID;
}
osi_property_get(IOT_INFO_REPORT_ENABLE_PROPERTY, value, "true");
iot_info_report_enabled = strncmp(value, "true", 4) == 0;
return NULL;
}
static future_t* clean_up(void) {
return NULL;
}
EXPORT_SYMBOL extern const module_t bt_utils_module = {.name = BT_UTILS_MODULE,
.init = init,
.start_up = NULL,
.shut_down = NULL,
.clean_up = clean_up,
.dependencies = {NULL}};
/*****************************************************************************
*
* Function check_do_scheduling_group
*
* Description check if it is ok to change schedule group
*
* Returns void
*
******************************************************************************/
static void check_do_scheduling_group(void) {
char buf[PROPERTY_VALUE_MAX];
int len = osi_property_get("debug.sys.noschedgroups", buf, "");
if (len > 0) {
int temp;
if (sscanf(buf, "%d", &temp) == 1) {
g_DoSchedulingGroup[g_TaskIdx] = temp == 0;
}
}
}
/*****************************************************************************
*
* Function raise_priority_a2dp
*
* Description Raise task priority for A2DP streaming
*
* Returns void
*
******************************************************************************/
void raise_priority_a2dp(tHIGH_PRIORITY_TASK high_task) {
int rc = 0;
int tid = gettid();
{
std::lock_guard<std::mutex> lock(gIdxLock);
g_TaskIdx = high_task;
// TODO(armansito): Remove this conditional check once we find a solution
// for system/core on non-Android platforms.
#if defined(OS_GENERIC)
rc = -1;
#else // !defined(OS_GENERIC)
pthread_once(&g_DoSchedulingGroupOnce[g_TaskIdx],
check_do_scheduling_group);
if (g_TaskIdx < TASK_HIGH_MAX && g_DoSchedulingGroup[g_TaskIdx]) {
// set_sched_policy does not support tid == 0
rc = set_sched_policy(tid, SP_AUDIO_SYS);
}
#endif // defined(OS_GENERIC)
g_TaskIDs[high_task] = tid;
}
if (rc) {
LOG_WARN(LOG_TAG, "failed to change sched policy, tid %d, err: %d", tid,
errno);
}
// make A2DP threads use RT scheduling policy since they are part of the
// audio pipeline
{
struct sched_param rt_params;
rt_params.sched_priority = A2DP_RT_PRIORITY;
const int rc = sched_setscheduler(tid, SCHED_FIFO, &rt_params);
if (rc != 0) {
LOG_ERROR(LOG_TAG,
"%s unable to set SCHED_FIFO priority %d for tid %d, error %s",
__func__, A2DP_RT_PRIORITY, tid, strerror(errno));
}
}
}
/*****************************************************************************
**
** Function bt_devclass_to_uint
**
** Description This function is used to get cod in unit from COD array.
**
** Returns cod.
**
*******************************************************************************/
uint32_t bt_devclass_to_uint(DEV_CLASS dev_class) {
uint32_t cod = 0;
if (dev_class != NULL) {
/* if COD is 0, irrespective of the device type set it to Unclassified
* device */
cod = (dev_class[2]) | (dev_class[1] << 8) | (dev_class[0] << 16);
}
return cod;
}
/*****************************************************************************
*
* Function is_iot_info_report_enabled
*
* Description check if iot info report is enabled.
*
* Returns bool
*
******************************************************************************/
bool is_iot_info_report_enabled() {
return iot_info_report_enabled;
}
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