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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
// LOG_TAG defined via build flag.
#ifndef LOG_TAG
#define LOG_TAG "HidlSensorManager"
#endif
#include <android-base/logging.h>
#include "SensorManager.h"
#include <sched.h>
#include "EventQueue.h"
#include "DirectReportChannel.h"
#include "utils.h"
#include <hwbinder/IPCThreadState.h>
#include <utils/String8.h>
namespace android {
namespace frameworks {
namespace sensorservice {
namespace V1_0 {
namespace implementation {
using ::android::hardware::sensors::V1_0::SensorInfo;
using ::android::hardware::sensors::V1_0::SensorsEventFormatOffset;
using ::android::hardware::hidl_vec;
using ::android::hardware::Void;
static const char* POLL_THREAD_NAME = "hidl_ssvc_poll";
SensorManager::SensorManager(JavaVM* vm)
: mLooper(new Looper(false /*allowNonCallbacks*/)), mStopThread(true), mJavaVm(vm) {
}
SensorManager::~SensorManager() {
// Stops pollAll inside the thread.
std::lock_guard<std::mutex> lock(mThreadMutex);
mStopThread = true;
if (mLooper != nullptr) {
mLooper->wake();
}
if (mPollThread.joinable()) {
mPollThread.join();
}
}
// Methods from ::android::frameworks::sensorservice::V1_0::ISensorManager follow.
Return<void> SensorManager::getSensorList(getSensorList_cb _hidl_cb) {
::android::Sensor const* const* list;
ssize_t count = getInternalManager().getSensorList(&list);
if (count < 0 || !list) {
LOG(ERROR) << "::android::SensorManager::getSensorList encounters " << count;
_hidl_cb({}, Result::UNKNOWN_ERROR);
return Void();
}
hidl_vec<SensorInfo> ret;
ret.resize(static_cast<size_t>(count));
for (ssize_t i = 0; i < count; ++i) {
ret[i] = convertSensor(*list[i]);
}
_hidl_cb(ret, Result::OK);
return Void();
}
Return<void> SensorManager::getDefaultSensor(SensorType type, getDefaultSensor_cb _hidl_cb) {
::android::Sensor const* sensor = getInternalManager().getDefaultSensor(static_cast<int>(type));
if (!sensor) {
_hidl_cb({}, Result::NOT_EXIST);
return Void();
}
_hidl_cb(convertSensor(*sensor), Result::OK);
return Void();
}
template<typename Callback>
void createDirectChannel(::android::SensorManager& manager, size_t size, int type,
const native_handle_t* handle, const Callback& _hidl_cb) {
int channelId = manager.createDirectChannel(
size, type, handle);
if (channelId < 0) {
_hidl_cb(nullptr, convertResult(channelId));
return;
}
if (channelId == 0) {
_hidl_cb(nullptr, Result::UNKNOWN_ERROR);
return;
}
_hidl_cb(sp<IDirectReportChannel>(new DirectReportChannel(manager, channelId)),
Result::OK);
}
Return<void> SensorManager::createAshmemDirectChannel(
const hidl_memory& mem, uint64_t size,
createAshmemDirectChannel_cb _hidl_cb) {
if (size > mem.size() || size < (uint64_t)SensorsEventFormatOffset::TOTAL_LENGTH) {
_hidl_cb(nullptr, Result::BAD_VALUE);
return Void();
}
createDirectChannel(getInternalManager(), size, SENSOR_DIRECT_MEM_TYPE_ASHMEM,
mem.handle(), _hidl_cb);
return Void();
}
Return<void> SensorManager::createGrallocDirectChannel(
const hidl_handle& buffer, uint64_t size,
createGrallocDirectChannel_cb _hidl_cb) {
createDirectChannel(getInternalManager(), size, SENSOR_DIRECT_MEM_TYPE_GRALLOC,
buffer.getNativeHandle(), _hidl_cb);
return Void();
}
/* One global looper for all event queues created from this SensorManager. */
sp<Looper> SensorManager::getLooper() {
std::lock_guard<std::mutex> lock(mThreadMutex);
if (!mPollThread.joinable()) {
// if thread not initialized, start thread
mStopThread = false;
std::thread pollThread{[&stopThread = mStopThread, looper = mLooper, javaVm = mJavaVm] {
struct sched_param p = {0};
p.sched_priority = 10;
if (sched_setscheduler(0 /* current thread*/, SCHED_FIFO, &p) != 0) {
LOG(WARNING) << "Could not use SCHED_FIFO for looper thread: "
<< strerror(errno);
}
// set looper
Looper::setForThread(looper);
// Attach the thread to JavaVM so that pollAll do not crash if the thread
// eventually calls into Java.
JavaVMAttachArgs args{
.version = JNI_VERSION_1_2,
.name = POLL_THREAD_NAME,
.group = nullptr
};
JNIEnv* env;
if (javaVm->AttachCurrentThread(&env, &args) != JNI_OK) {
LOG(FATAL) << "Cannot attach SensorManager looper thread to Java VM.";
}
LOG(INFO) << POLL_THREAD_NAME << " started.";
for (;;) {
int pollResult = looper->pollAll(-1 /* timeout */);
if (pollResult == Looper::POLL_WAKE) {
if (stopThread == true) {
LOG(INFO) << POLL_THREAD_NAME << ": requested to stop";
break;
} else {
LOG(INFO) << POLL_THREAD_NAME << ": spurious wake up, back to work";
}
} else {
LOG(ERROR) << POLL_THREAD_NAME << ": Looper::pollAll returns unexpected "
<< pollResult;
break;
}
}
if (javaVm->DetachCurrentThread() != JNI_OK) {
LOG(ERROR) << "Cannot detach SensorManager looper thread from Java VM.";
}
LOG(INFO) << POLL_THREAD_NAME << " is terminated.";
}};
mPollThread = std::move(pollThread);
}
return mLooper;
}
::android::SensorManager& SensorManager::getInternalManager() {
std::lock_guard<std::mutex> lock(mInternalManagerMutex);
if (mInternalManager == nullptr) {
mInternalManager = &::android::SensorManager::getInstanceForPackage(
String16(ISensorManager::descriptor));
}
return *mInternalManager;
}
Return<void> SensorManager::createEventQueue(
const sp<IEventQueueCallback> &callback, createEventQueue_cb _hidl_cb) {
if (callback == nullptr) {
_hidl_cb(nullptr, Result::BAD_VALUE);
return Void();
}
sp<::android::Looper> looper = getLooper();
if (looper == nullptr) {
LOG(ERROR) << "::android::SensorManager::createEventQueue cannot initialize looper";
_hidl_cb(nullptr, Result::UNKNOWN_ERROR);
return Void();
}
String8 package(String8::format("hidl_client_pid_%d",
android::hardware::IPCThreadState::self()->getCallingPid()));
sp<::android::SensorEventQueue> internalQueue = getInternalManager().createEventQueue(package);
if (internalQueue == nullptr) {
LOG(WARNING) << "::android::SensorManager::createEventQueue returns nullptr.";
_hidl_cb(nullptr, Result::UNKNOWN_ERROR);
return Void();
}
sp<IEventQueue> queue = new EventQueue(callback, looper, internalQueue);
_hidl_cb(queue, Result::OK);
return Void();
}
} // namespace implementation
} // namespace V1_0
} // namespace sensorservice
} // namespace frameworks
} // namespace android
|
