split libsensor our of libgui
Test: compile & run
Bug: treble cleanup
Change-Id: I5b2c2a14f7d3b364d25695cf0901c5b08cfb0fc9
diff --git a/libs/sensor/SensorEventQueue.cpp b/libs/sensor/SensorEventQueue.cpp
new file mode 100644
index 0000000..8ba3ebe
--- /dev/null
+++ b/libs/sensor/SensorEventQueue.cpp
@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "Sensors"
+
+#include <sensor/SensorEventQueue.h>
+
+#include <algorithm>
+#include <sys/socket.h>
+
+#include <utils/RefBase.h>
+#include <utils/Looper.h>
+
+#include <sensor/Sensor.h>
+#include <sensor/BitTube.h>
+#include <sensor/ISensorEventConnection.h>
+
+#include <android/sensor.h>
+
+using std::min;
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+SensorEventQueue::SensorEventQueue(const sp<ISensorEventConnection>& connection)
+ : mSensorEventConnection(connection), mRecBuffer(NULL), mAvailable(0), mConsumed(0),
+ mNumAcksToSend(0) {
+ mRecBuffer = new ASensorEvent[MAX_RECEIVE_BUFFER_EVENT_COUNT];
+}
+
+SensorEventQueue::~SensorEventQueue() {
+ delete [] mRecBuffer;
+}
+
+void SensorEventQueue::onFirstRef()
+{
+ mSensorChannel = mSensorEventConnection->getSensorChannel();
+}
+
+int SensorEventQueue::getFd() const
+{
+ return mSensorChannel->getFd();
+}
+
+
+ssize_t SensorEventQueue::write(const sp<BitTube>& tube,
+ ASensorEvent const* events, size_t numEvents) {
+ return BitTube::sendObjects(tube, events, numEvents);
+}
+
+ssize_t SensorEventQueue::read(ASensorEvent* events, size_t numEvents) {
+ if (mAvailable == 0) {
+ ssize_t err = BitTube::recvObjects(mSensorChannel,
+ mRecBuffer, MAX_RECEIVE_BUFFER_EVENT_COUNT);
+ if (err < 0) {
+ return err;
+ }
+ mAvailable = static_cast<size_t>(err);
+ mConsumed = 0;
+ }
+ size_t count = min(numEvents, mAvailable);
+ memcpy(events, mRecBuffer + mConsumed, count * sizeof(ASensorEvent));
+ mAvailable -= count;
+ mConsumed += count;
+ return static_cast<ssize_t>(count);
+}
+
+sp<Looper> SensorEventQueue::getLooper() const
+{
+ Mutex::Autolock _l(mLock);
+ if (mLooper == 0) {
+ mLooper = new Looper(true);
+ mLooper->addFd(getFd(), getFd(), ALOOPER_EVENT_INPUT, NULL, NULL);
+ }
+ return mLooper;
+}
+
+status_t SensorEventQueue::waitForEvent() const
+{
+ const int fd = getFd();
+ sp<Looper> looper(getLooper());
+
+ int events;
+ int32_t result;
+ do {
+ result = looper->pollOnce(-1, NULL, &events, NULL);
+ if (result == ALOOPER_POLL_ERROR) {
+ ALOGE("SensorEventQueue::waitForEvent error (errno=%d)", errno);
+ result = -EPIPE; // unknown error, so we make up one
+ break;
+ }
+ if (events & ALOOPER_EVENT_HANGUP) {
+ // the other-side has died
+ ALOGE("SensorEventQueue::waitForEvent error HANGUP");
+ result = -EPIPE; // unknown error, so we make up one
+ break;
+ }
+ } while (result != fd);
+
+ return (result == fd) ? status_t(NO_ERROR) : result;
+}
+
+status_t SensorEventQueue::wake() const
+{
+ sp<Looper> looper(getLooper());
+ looper->wake();
+ return NO_ERROR;
+}
+
+status_t SensorEventQueue::enableSensor(Sensor const* sensor) const {
+ return enableSensor(sensor, SENSOR_DELAY_NORMAL);
+}
+
+status_t SensorEventQueue::enableSensor(Sensor const* sensor, int32_t samplingPeriodUs) const {
+ return mSensorEventConnection->enableDisable(sensor->getHandle(), true,
+ us2ns(samplingPeriodUs), 0, 0);
+}
+
+status_t SensorEventQueue::disableSensor(Sensor const* sensor) const {
+ return mSensorEventConnection->enableDisable(sensor->getHandle(), false, 0, 0, 0);
+}
+
+status_t SensorEventQueue::enableSensor(int32_t handle, int32_t samplingPeriodUs,
+ int maxBatchReportLatencyUs, int reservedFlags) const {
+ return mSensorEventConnection->enableDisable(handle, true, us2ns(samplingPeriodUs),
+ us2ns(maxBatchReportLatencyUs), reservedFlags);
+}
+
+status_t SensorEventQueue::flush() const {
+ return mSensorEventConnection->flush();
+}
+
+status_t SensorEventQueue::disableSensor(int32_t handle) const {
+ return mSensorEventConnection->enableDisable(handle, false, 0, 0, false);
+}
+
+status_t SensorEventQueue::setEventRate(Sensor const* sensor, nsecs_t ns) const {
+ return mSensorEventConnection->setEventRate(sensor->getHandle(), ns);
+}
+
+status_t SensorEventQueue::injectSensorEvent(const ASensorEvent& event) {
+ do {
+ // Blocking call.
+ ssize_t size = ::send(mSensorChannel->getFd(), &event, sizeof(event), MSG_NOSIGNAL);
+ if (size >= 0) {
+ return NO_ERROR;
+ } else if (size < 0 && errno == EAGAIN) {
+ // If send is returning a "Try again" error, sleep for 100ms and try again. In all
+ // other cases log a failure and exit.
+ usleep(100000);
+ } else {
+ ALOGE("injectSensorEvent failure %s %zd", strerror(errno), size);
+ return INVALID_OPERATION;
+ }
+ } while (true);
+}
+
+void SensorEventQueue::sendAck(const ASensorEvent* events, int count) {
+ for (int i = 0; i < count; ++i) {
+ if (events[i].flags & WAKE_UP_SENSOR_EVENT_NEEDS_ACK) {
+ ++mNumAcksToSend;
+ }
+ }
+ // Send mNumAcksToSend to acknowledge for the wake up sensor events received.
+ if (mNumAcksToSend > 0) {
+ ssize_t size = ::send(mSensorChannel->getFd(), &mNumAcksToSend, sizeof(mNumAcksToSend),
+ MSG_DONTWAIT | MSG_NOSIGNAL);
+ if (size < 0) {
+ ALOGE("sendAck failure %zd %d", size, mNumAcksToSend);
+ } else {
+ mNumAcksToSend = 0;
+ }
+ }
+ return;
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+