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 "EventQueue.h"
18 #include "utils.h"
19
20 #include <utils/Looper.h>
21
22 namespace android {
23 namespace frameworks {
24 namespace sensorservice {
25 namespace V1_0 {
26 namespace implementation {
27
28 class EventQueueLooperCallback : public ::android::LooperCallback {
29 public:
EventQueueLooperCallback(sp<::android::SensorEventQueue> queue,sp<IEventQueueCallback> callback)30 EventQueueLooperCallback(sp<::android::SensorEventQueue> queue,
31 sp<IEventQueueCallback> callback)
32 : mQueue(queue), mCallback(callback) {
33 }
34
handleEvent(__unused int fd,__unused int events,__unused void * data)35 int handleEvent(__unused int fd, __unused int events, __unused void* data) {
36
37 ASensorEvent event;
38 ssize_t actual;
39
40 auto internalQueue = mQueue.promote();
41 if (internalQueue == nullptr) {
42 return 1;
43 }
44
45 while ((actual = internalQueue->read(&event, 1 /* count */)) > 0) {
46 internalQueue->sendAck(&event, actual);
47 Return<void> ret = mCallback->onEvent(convertEvent(event));
48 (void)ret.isOk(); // ignored
49 }
50
51 return 1; // continue to receive callbacks
52 }
53
54 private:
55 wp<::android::SensorEventQueue> mQueue;
56 sp<IEventQueueCallback> mCallback;
57 };
58
EventQueue(sp<IEventQueueCallback> callback,sp<::android::Looper> looper,sp<::android::SensorEventQueue> internalQueue)59 EventQueue::EventQueue(
60 sp<IEventQueueCallback> callback,
61 sp<::android::Looper> looper,
62 sp<::android::SensorEventQueue> internalQueue)
63 : mLooper(looper),
64 mInternalQueue(internalQueue) {
65
66 mLooper->addFd(internalQueue->getFd(), ALOOPER_POLL_CALLBACK, ALOOPER_EVENT_INPUT,
67 new EventQueueLooperCallback(internalQueue, callback), nullptr /* data */);
68 }
69
onLastStrongRef(const void * id)70 void EventQueue::onLastStrongRef(const void *id) {
71 IEventQueue::onLastStrongRef(id);
72 mLooper->removeFd(mInternalQueue->getFd());
73 }
74
75 // Methods from ::android::frameworks::sensorservice::V1_0::IEventQueue follow.
enableSensor(int32_t sensorHandle,int32_t samplingPeriodUs,int64_t maxBatchReportLatencyUs)76 Return<Result> EventQueue::enableSensor(int32_t sensorHandle, int32_t samplingPeriodUs,
77 int64_t maxBatchReportLatencyUs) {
78 return convertResult(mInternalQueue->enableSensor(sensorHandle, samplingPeriodUs,
79 maxBatchReportLatencyUs, 0 /* reserved flags */));
80 }
81
disableSensor(int32_t sensorHandle)82 Return<Result> EventQueue::disableSensor(int32_t sensorHandle) {
83 return convertResult(mInternalQueue->disableSensor(sensorHandle));
84 }
85
86 } // namespace implementation
87 } // namespace V1_0
88 } // namespace sensorservice
89 } // namespace frameworks
90 } // namespace android
91