1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/******************************************************************************
*
* Copyright 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
#ifdef OS_ANDROID
#include <processgroup/sched_policy.h>
#endif
#include "btcore/include/module.h"
#include "osi/include/compat.h"
#include "osi/include/log.h"
#include "osi/include/properties.h"
/*******************************************************************************
* 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 future_t* init(void) {
int i;
for (i = 0; i < TASK_HIGH_MAX; i++) {
g_DoSchedulingGroupOnce[i] = PTHREAD_ONCE_INIT;
g_DoSchedulingGroup[i] = true;
g_TaskIDs[i] = INVALID_TASK_ID;
}
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}};
#ifdef OS_ANDROID
/*****************************************************************************
*
* 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;
}
}
}
#endif
/*****************************************************************************
*
* 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.
#ifndef OS_ANDROID
rc = -1;
#else // defined(OS_ANDROID)
pthread_once(&g_DoSchedulingGroupOnce[g_TaskIdx],
check_do_scheduling_group);
if (g_DoSchedulingGroup[g_TaskIdx]) {
// set_sched_policy does not support tid == 0
rc = set_sched_policy(tid, SP_AUDIO_SYS);
}
#endif // ifndef(OS_ANDROID)
g_TaskIDs[high_task] = tid;
}
if (rc) {
LOG_WARN("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("%s unable to set SCHED_FIFO priority %d for tid %d, error %s",
__func__, A2DP_RT_PRIORITY, tid, strerror(errno));
}
}
}
|
