45e0acb41a
The ALooper API now uses an explicit "identifier" for the integer that is returned rather than implicitly using the fd. This allows the APIs that had the fd to be a little more sane. Change-Id: I8507f535ad484c0bdc4a1bd016d87bb09acd7ff0
136 lines
3.8 KiB
C++
136 lines
3.8 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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#define LOG_TAG "Sensors"
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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#include <utils/RefBase.h>
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#include <utils/PollLoop.h>
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#include <gui/Sensor.h>
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#include <gui/SensorChannel.h>
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#include <gui/SensorEventQueue.h>
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#include <gui/ISensorEventConnection.h>
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#include <android/sensor.h>
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// ----------------------------------------------------------------------------
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namespace android {
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// ----------------------------------------------------------------------------
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SensorEventQueue::SensorEventQueue(const sp<ISensorEventConnection>& connection)
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: mSensorEventConnection(connection)
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{
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}
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SensorEventQueue::~SensorEventQueue()
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{
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}
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void SensorEventQueue::onFirstRef()
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{
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mSensorChannel = mSensorEventConnection->getSensorChannel();
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}
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int SensorEventQueue::getFd() const
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{
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return mSensorChannel->getFd();
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}
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ssize_t SensorEventQueue::write(ASensorEvent const* events, size_t numEvents)
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{
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ssize_t size = mSensorChannel->write(events, numEvents * sizeof(events[0]));
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if (size >= 0) {
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if (size % sizeof(events[0])) {
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// partial write!!! should never happen.
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return -EINVAL;
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}
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// returns number of events written
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size /= sizeof(events[0]);
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}
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return size;
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}
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ssize_t SensorEventQueue::read(ASensorEvent* events, size_t numEvents)
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{
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ssize_t size = mSensorChannel->read(events, numEvents*sizeof(events[0]));
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if (size >= 0) {
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if (size % sizeof(events[0])) {
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// partial read!!! should never happen.
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return -EINVAL;
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}
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// returns number of events read
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size /= sizeof(events[0]);
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}
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return size;
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}
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sp<PollLoop> SensorEventQueue::getPollLoop() const
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{
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Mutex::Autolock _l(mLock);
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if (mPollLoop == 0) {
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mPollLoop = new PollLoop(true);
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mPollLoop->setCallback(getFd(), getFd(), POLLIN, NULL, NULL);
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}
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return mPollLoop;
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}
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status_t SensorEventQueue::waitForEvent() const
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{
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const int fd = getFd();
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sp<PollLoop> pollLoop(getPollLoop());
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int32_t result = pollLoop->pollOnce(-1, NULL, NULL);
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return (result == fd) ? NO_ERROR : -1;
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}
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status_t SensorEventQueue::wake() const
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{
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sp<PollLoop> pollLoop(getPollLoop());
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pollLoop->wake();
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return NO_ERROR;
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}
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status_t SensorEventQueue::enableSensor(Sensor const* sensor) const {
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return mSensorEventConnection->enableDisable(sensor->getHandle(), true);
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}
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status_t SensorEventQueue::disableSensor(Sensor const* sensor) const {
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return mSensorEventConnection->enableDisable(sensor->getHandle(), false);
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}
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status_t SensorEventQueue::enableSensor(int32_t handle, int32_t us) const {
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status_t err = mSensorEventConnection->enableDisable(handle, true);
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if (err == NO_ERROR) {
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mSensorEventConnection->setEventRate(handle, us2ns(us));
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}
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return err;
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}
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status_t SensorEventQueue::disableSensor(int32_t handle) const {
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return mSensorEventConnection->enableDisable(handle, false);
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}
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status_t SensorEventQueue::setEventRate(Sensor const* sensor, nsecs_t ns) const {
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return mSensorEventConnection->setEventRate(sensor->getHandle(), ns);
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}
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// ----------------------------------------------------------------------------
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}; // namespace android
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