1/****************************************************************************** 2 * 3 * Copyright (C) 2012 Broadcom Corporation 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/************************************************************************************ 20 * 21 * Filename: bt_utils.c 22 * 23 * Description: Miscellaneous helper functions 24 * 25 * 26 ***********************************************************************************/ 27 28#include <cutils/properties.h> 29#include <cutils/sched_policy.h> 30#include <errno.h> 31#include <pthread.h> 32#include <sys/resource.h> 33#include <stdio.h> 34#include <stdlib.h> 35#include <unistd.h> 36#include <utils/ThreadDefs.h> 37 38#define LOG_TAG "BT_UTILS" 39 40#include <utils/Log.h> 41 42#include "data_types.h" 43#include "bt_utils.h" 44 45 46/******************************************************************************* 47** Type definitions for callback functions 48********************************************************************************/ 49static pthread_once_t g_DoSchedulingGroupOnce[TASK_HIGH_MAX]; 50static BOOLEAN g_DoSchedulingGroup[TASK_HIGH_MAX]; 51static pthread_mutex_t gIdxLock; 52static int g_TaskIdx; 53 54/***************************************************************************** 55** 56** Function bt_utils_init 57** 58** Description Initialize bluedroid util 59** 60** Returns void 61** 62*******************************************************************************/ 63void bt_utils_init() { 64 int i; 65 pthread_mutexattr_t lock_attr; 66 67 for(i = 0; i < TASK_HIGH_MAX; i++) { 68 g_DoSchedulingGroupOnce[i] = PTHREAD_ONCE_INIT; 69 g_DoSchedulingGroup[i] = TRUE; 70 } 71 pthread_mutexattr_init(&lock_attr); 72 pthread_mutex_init(&gIdxLock, &lock_attr); 73} 74 75/***************************************************************************** 76** 77** Function bt_utils_cleanup 78** 79** Description Clean up bluedroid util 80** 81** Returns void 82** 83*******************************************************************************/ 84void bt_utils_cleanup() { 85 pthread_mutex_destroy(&gIdxLock); 86} 87 88/***************************************************************************** 89** 90** Function check_do_scheduling_group 91** 92** Description check if it is ok to change schedule group 93** 94** Returns void 95** 96*******************************************************************************/ 97static void check_do_scheduling_group(void) { 98 char buf[PROPERTY_VALUE_MAX]; 99 int len = property_get("debug.sys.noschedgroups", buf, ""); 100 if (len > 0) { 101 int temp; 102 if (sscanf(buf, "%d", &temp) == 1) { 103 g_DoSchedulingGroup[g_TaskIdx] = temp == 0; 104 } 105 } 106} 107 108/***************************************************************************** 109** 110** Function raise_priority_a2dp 111** 112** Description Raise task priority for A2DP streaming 113** 114** Returns void 115** 116*******************************************************************************/ 117void raise_priority_a2dp(tHIGH_PRIORITY_TASK high_task) { 118 int rc = 0; 119 int tid = gettid(); 120 121 pthread_mutex_lock(&gIdxLock); 122 g_TaskIdx = high_task; 123 124 pthread_once(&g_DoSchedulingGroupOnce[g_TaskIdx], check_do_scheduling_group); 125 if (g_DoSchedulingGroup[g_TaskIdx]) { 126 // set_sched_policy does not support tid == 0 127 rc = set_sched_policy(tid, SP_FOREGROUND); 128 } 129 pthread_mutex_unlock(&gIdxLock); 130 131 if (rc) { 132 ALOGW("failed to change sched policy, tid %d, err: %d", tid, errno); 133 } 134 135 if (setpriority(PRIO_PROCESS, tid, ANDROID_PRIORITY_AUDIO) < 0) { 136 ALOGW("failed to change priority tid: %d to %d", tid, ANDROID_PRIORITY_AUDIO); 137 } 138} 139 140