sensor.cpp revision b957b9d63c88efd3a961759424987b99219adeed 
1/*
2 * Copyright (C) 2009 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#define LOG_TAG "sensor"
18#include <utils/Log.h>
19
20#include <android/looper.h>
21#include <android/sensor.h>
22
23#include <utils/RefBase.h>
24#include <utils/PollLoop.h>
25#include <utils/Timers.h>
26
27#include <gui/Sensor.h>
28#include <gui/SensorManager.h>
29#include <gui/SensorEventQueue.h>
30
31#include <poll.h>
32
33using android::sp;
34using android::Sensor;
35using android::SensorManager;
36using android::SensorEventQueue;
37using android::String8;
38
39/*****************************************************************************/
40
41ASensorManager* ASensorManager_getInstance()
42{
43    return &SensorManager::getInstance();
44}
45
46int ASensorManager_getSensorList(ASensorManager* manager, ASensor** list)
47{
48    Sensor* l;
49    int c = static_cast<SensorManager*>(manager)->getSensorList(&l);
50    if (list) {
51        *list = l;
52    }
53    return c;
54}
55
56ASensor* ASensorManager_getDefaultSensor(ASensorManager* manager, int type)
57{
58    return static_cast<SensorManager*>(manager)->getDefaultSensor(type);
59}
60
61ASensorEventQueue* ASensorManager_createEventQueue(ASensorManager* manager,
62        ALooper* looper, ALooper_callbackFunc* callback, void* data)
63{
64    sp<SensorEventQueue> queue =
65            static_cast<SensorManager*>(manager)->createEventQueue();
66    if (queue != 0) {
67        ALooper_addFd(looper, queue->getFd(), POLLIN, callback, data);
68        queue->looper = looper;
69        queue->incStrong(manager);
70    }
71    return static_cast<ASensorEventQueue*>(queue.get());
72}
73
74int ASensorManager_destroyEventQueue(ASensorManager* manager,
75        ASensorEventQueue* inQueue)
76{
77    sp<SensorEventQueue> queue = static_cast<SensorEventQueue*>(inQueue);
78    ALooper_removeFd(queue->looper, queue->getFd());
79    queue->decStrong(manager);
80    return 0;
81}
82
83/*****************************************************************************/
84
85int ASensorEventQueue_enableSensor(ASensorEventQueue* queue, ASensor* sensor)
86{
87    return static_cast<SensorEventQueue*>(queue)->enableSensor(
88            static_cast<Sensor*>(sensor));
89}
90
91int ASensorEventQueue_disableSensor(ASensorEventQueue* queue, ASensor* sensor)
92{
93    return static_cast<SensorEventQueue*>(queue)->disableSensor(
94            static_cast<Sensor*>(sensor));
95}
96
97int ASensorEventQueue_setEventRate(ASensorEventQueue* queue, ASensor* sensor,
98        int32_t usec)
99{
100    return static_cast<SensorEventQueue*>(queue)->setEventRate(
101            static_cast<Sensor*>(sensor), us2ns(usec));
102}
103
104int ASensorEventQueue_hasEvents(ASensorEventQueue* queue)
105{
106    struct pollfd pfd;
107    pfd.fd = static_cast<SensorEventQueue*>(queue)->getFd();
108    pfd.events = POLLIN;
109    pfd.revents = 0;
110
111    int nfd = poll(&pfd, 1, 0);
112
113    if (nfd < 0)
114        return -errno;
115
116    if (pfd.revents != POLLIN)
117        return -1;
118
119    return (nfd == 0) ? 0 : 1;
120}
121
122ssize_t ASensorEventQueue_getEvents(ASensorEventQueue* queue,
123                ASensorEvent* events, size_t count)
124{
125    return static_cast<SensorEventQueue*>(queue)->read(events, count);
126}
127
128
129/*****************************************************************************/
130
131const char* ASensor_getName(ASensor* sensor)
132{
133    return static_cast<Sensor*>(sensor)->getName().string();
134}
135
136const char* ASensor_getVendor(ASensor* sensor)
137{
138    return static_cast<Sensor*>(sensor)->getVendor().string();
139}
140
141int ASensor_getType(ASensor* sensor)
142{
143    return static_cast<Sensor*>(sensor)->getType();
144}
145
146float ASensor_getResolution(ASensor* sensor)
147{
148    return static_cast<Sensor*>(sensor)->getResolution();
149}
150
151