d88dfe8607
Replace cutils/log.h with log/log.h. Sort headers. Minimize conflicts. Add missing required headers. Test: compile Bug: 34250038 Change-Id: I5c0f231cbfed90b73e0538c9d32ad3226c7cc5e4
93 lines
2.5 KiB
C++
93 lines
2.5 KiB
C++
/*
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* Copyright (C) 2013 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 <pthread.h>
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#include <algorithm>
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#include <log/log.h>
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#include <hardware/sensors.h>
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#include "SensorEventQueue.h"
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SensorEventQueue::SensorEventQueue(int capacity) {
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mCapacity = capacity;
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mStart = 0;
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mSize = 0;
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mData = new sensors_event_t[mCapacity];
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pthread_cond_init(&mSpaceAvailableCondition, NULL);
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}
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SensorEventQueue::~SensorEventQueue() {
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delete[] mData;
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mData = NULL;
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pthread_cond_destroy(&mSpaceAvailableCondition);
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}
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int SensorEventQueue::getWritableRegion(int requestedLength, sensors_event_t** out) {
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if (mSize == mCapacity || requestedLength <= 0) {
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*out = NULL;
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return 0;
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}
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// Start writing after the last readable record.
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int firstWritable = (mStart + mSize) % mCapacity;
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int lastWritable = firstWritable + requestedLength - 1;
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// Don't go past the end of the data array.
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if (lastWritable > mCapacity - 1) {
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lastWritable = mCapacity - 1;
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}
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// Don't go into the readable region.
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if (firstWritable < mStart && lastWritable >= mStart) {
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lastWritable = mStart - 1;
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}
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*out = &mData[firstWritable];
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return lastWritable - firstWritable + 1;
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}
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void SensorEventQueue::markAsWritten(int count) {
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mSize += count;
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}
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int SensorEventQueue::getSize() {
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return mSize;
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}
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sensors_event_t* SensorEventQueue::peek() {
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if (mSize == 0) return NULL;
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return &mData[mStart];
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}
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void SensorEventQueue::dequeue() {
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if (mSize == 0) return;
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if (mSize == mCapacity) {
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pthread_cond_broadcast(&mSpaceAvailableCondition);
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}
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mSize--;
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mStart = (mStart + 1) % mCapacity;
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}
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// returns true if it waited, or false if it was a no-op.
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bool SensorEventQueue::waitForSpace(pthread_mutex_t* mutex) {
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bool waited = false;
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while (mSize == mCapacity) {
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waited = true;
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pthread_cond_wait(&mSpaceAvailableCondition, mutex);
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}
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return waited;
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}
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