50b66767f6
whether a physical sensor needed to be active or not was managed by a simpe reference counter; unfortunatelly nothing prevented it to get out of sync if a sensor was disabled more than once. sensorservice already maintainted a list of all the "clients" connected to a physical sensor; we now use that list to determine if a sensor should be enabled. This can never be "out-of-sync" since this is the only data structure linking a sensor to a user of that sensor. also removed the isEnabled() method, which was never used and implemented wrongly (since it didn't take into account that a sensor could be disabled for a client but not of another). Change-Id: I789affb877728ca957e99f7ba749def37c4db1c7
83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <math.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <hardware/sensors.h>
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#include "LinearAccelerationSensor.h"
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namespace android {
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// ---------------------------------------------------------------------------
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LinearAccelerationSensor::LinearAccelerationSensor(sensor_t const* list, size_t count)
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: mSensorDevice(SensorDevice::getInstance()),
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mGravitySensor(list, count)
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{
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mData[0] = mData[1] = mData[2] = 0;
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}
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bool LinearAccelerationSensor::process(sensors_event_t* outEvent,
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const sensors_event_t& event)
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{
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bool result = mGravitySensor.process(outEvent, event);
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if (result) {
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if (event.type == SENSOR_TYPE_ACCELEROMETER) {
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mData[0] = event.acceleration.x;
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mData[1] = event.acceleration.y;
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mData[2] = event.acceleration.z;
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}
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outEvent->data[0] = mData[0] - outEvent->data[0];
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outEvent->data[1] = mData[1] - outEvent->data[1];
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outEvent->data[2] = mData[2] - outEvent->data[2];
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outEvent->sensor = '_lin';
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outEvent->type = SENSOR_TYPE_LINEAR_ACCELERATION;
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}
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return result;
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}
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status_t LinearAccelerationSensor::activate(void* ident, bool enabled) {
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return mGravitySensor.activate(ident, enabled);
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}
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status_t LinearAccelerationSensor::setDelay(void* ident, int handle, int64_t ns) {
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return mGravitySensor.setDelay(ident, handle, ns);
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}
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Sensor LinearAccelerationSensor::getSensor() const {
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Sensor gsensor(mGravitySensor.getSensor());
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sensor_t hwSensor;
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hwSensor.name = "Linear Acceleration Sensor";
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hwSensor.vendor = "Google Inc.";
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hwSensor.version = 1;
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hwSensor.handle = '_lin';
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hwSensor.type = SENSOR_TYPE_LINEAR_ACCELERATION;
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hwSensor.maxRange = gsensor.getMaxValue();
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hwSensor.resolution = gsensor.getResolution();
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hwSensor.power = gsensor.getPowerUsage();
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hwSensor.minDelay = gsensor.getMinDelay();
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Sensor sensor(&hwSensor);
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return sensor;
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}
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// ---------------------------------------------------------------------------
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}; // namespace android
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