1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include "SensorDeviceUtils.h"
18
19 #include <android/hardware/sensors/1.0/ISensors.h>
20 #include <utils/Log.h>
21
22 #include <chrono>
23 #include <thread>
24
25 using ::android::hardware::Void;
26 using namespace android::hardware::sensors::V1_0;
27
28 namespace android {
29 namespace SensorDeviceUtils {
30
HidlServiceRegistrationWaiter()31 HidlServiceRegistrationWaiter::HidlServiceRegistrationWaiter() {
32 }
33
onFirstRef()34 void HidlServiceRegistrationWaiter::onFirstRef() {
35 // Creating sp<...>(this) in the constructor should be avoided, hence
36 // registerForNotifications is called in onFirstRef callback.
37 mRegistered = ISensors::registerForNotifications("default", this);
38 }
39
onRegistration(const hidl_string & fqName,const hidl_string & name,bool preexisting)40 Return<void> HidlServiceRegistrationWaiter::onRegistration(
41 const hidl_string &fqName, const hidl_string &name, bool preexisting) {
42 ALOGV("onRegistration fqName %s, name %s, preexisting %d",
43 fqName.c_str(), name.c_str(), preexisting);
44
45 {
46 std::lock_guard<std::mutex> lk(mLock);
47 mRestartObserved = true;
48 }
49 mCondition.notify_all();
50 return Void();
51 }
52
reset()53 void HidlServiceRegistrationWaiter::reset() {
54 std::lock_guard<std::mutex> lk(mLock);
55 mRestartObserved = false;
56 }
57
wait()58 bool HidlServiceRegistrationWaiter::wait() {
59 constexpr int DEFAULT_WAIT_MS = 100;
60 constexpr int TIMEOUT_MS = 1000;
61
62 if (!mRegistered) {
63 ALOGW("Cannot register service notification, use default wait(%d ms)", DEFAULT_WAIT_MS);
64 std::this_thread::sleep_for(std::chrono::milliseconds(DEFAULT_WAIT_MS));
65 // not sure if service is actually restarted
66 return false;
67 }
68
69 std::unique_lock<std::mutex> lk(mLock);
70 return mCondition.wait_for(lk, std::chrono::milliseconds(TIMEOUT_MS),
71 [this]{return mRestartObserved;});
72 }
73
74 } // namespace SensorDeviceUtils
75 } // namespace android
76