pre-0.0.3 #46
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package scientifik.kmath.sequential
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import kotlinx.atomicfu.atomic
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.GlobalScope
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import kotlinx.coroutines.channels.*
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import kotlinx.coroutines.isActive
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import kotlinx.coroutines.launch
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import scientifik.kmath.structures.Buffer
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import scientifik.kmath.structures.asBuffer
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import scientifik.kmath.structures.asSequence
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fun <T> Buffer<T>.asChannel(scope: CoroutineScope): ReceiveChannel<T> = scope.produce {
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for (i in (0 until size)) {
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send(get(i))
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}
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}
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interface BufferProducer<T> : Producer<T> {
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suspend fun receiveBuffer(): Buffer<T>
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}
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interface BufferConsumer<T> : Consumer<T> {
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suspend fun sendBuffer(buffer: Buffer<T>)
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}
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abstract class AbstractBufferProducer<T>(scope: CoroutineScope) : AbstractProducer<T>(scope), BufferProducer<T> {
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override fun connectOutput(consumer: Consumer<T>) {
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if (consumer is BufferConsumer) {
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launch {
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while (this.isActive) {
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consumer.sendBuffer(receiveBuffer())
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}
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}
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} else {
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super.connectOutput(consumer)
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}
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}
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}
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abstract class AbstractBufferConsumer<T>(scope: CoroutineScope) : AbstractConsumer<T>(scope), BufferConsumer<T> {
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override fun connectInput(producer: Producer<T>) {
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if (producer is BufferProducer) {
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launch {
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while (isActive) {
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sendBuffer(producer.receiveBuffer())
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}
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}
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} else {
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super.connectInput(producer)
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}
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}
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}
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abstract class AbstractBufferProcessor<T, R>(scope: CoroutineScope) :
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AbstractProcessor<T, R>(scope),
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BufferProducer<R>,
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BufferConsumer<T> {
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override fun connectOutput(consumer: Consumer<R>) {
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if (consumer is BufferConsumer) {
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launch {
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while (this.isActive) {
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consumer.sendBuffer(receiveBuffer())
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}
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}
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} else {
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super.connectOutput(consumer)
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}
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}
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override fun connectInput(producer: Producer<T>) {
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if (producer is BufferProducer) {
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launch {
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while (isActive) {
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sendBuffer(producer.receiveBuffer())
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}
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}
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} else {
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super.connectInput(producer)
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}
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}
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}
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/**
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* The basic generic buffer producer supporting both arrays and element-by-element simultaneously
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*/
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class BasicBufferProducer<T>(
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scope: CoroutineScope,
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capacity: Int = Channel.UNLIMITED,
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block: suspend ProducerScope<Buffer<T>>.() -> Unit
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) : AbstractBufferProducer<T>(scope) {
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private val currentArray = atomic<ReceiveChannel<T>?>(null)
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private val channel: ReceiveChannel<Buffer<T>> by lazy { produce(capacity = capacity, block = block) }
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private val cachingChannel by lazy {
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channel.map {
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it.also { buffer -> currentArray.lazySet(buffer.asChannel(this)) }
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}
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}
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private fun DoubleArray.asChannel() = produce {
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for (value in this@asChannel) {
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send(value)
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}
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}
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override suspend fun receiveBuffer(): Buffer<T> = cachingChannel.receive()
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override suspend fun receive(): T = (currentArray.value ?: cachingChannel.receive().asChannel(this)).receive()
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}
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class BufferReducer<T, S>(
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scope: CoroutineScope,
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initialState: S,
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val fold: suspend (S, Buffer<T>) -> S
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) : AbstractBufferConsumer<T>(scope) {
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var state: S = initialState
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private set
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override suspend fun sendBuffer(buffer: Buffer<T>) {
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state = fold(state, buffer)
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}
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override suspend fun send(value: T) = sendBuffer(arrayOf(value).asBuffer())
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}
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/**
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* Convert a [Buffer] to single element producer, splitting it in chunks if necessary
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*/
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fun <T> Buffer<T>.produce(scope: CoroutineScope = GlobalScope, chunkSize: Int = Int.MAX_VALUE) =
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if (size < chunkSize) {
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BasicBufferProducer<T>(scope) { send(this@produce) }
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} else {
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BasicBufferProducer<T>(scope) {
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//TODO optimize this!
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asSequence().chunked(chunkSize).forEach {
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send(it.asBuffer())
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}
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}
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}
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/**
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* A buffer processor that works with buffers but could accumulate at lest [accumulate] elements from single input before processing.
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*
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* This class combines functions from [ChunkProcessor] and single buffer processor
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*/
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class AccumulatingBufferProcessor<T, R>(
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scope: CoroutineScope,
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val accumulate: Int,
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val process: suspend (Buffer<T>) -> Buffer<R>
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) :
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AbstractBufferProcessor<T, R>(scope) {
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private val inputChannel = Channel<Buffer<T>>()
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private val outputChannel = inputChannel.map { process(it) }
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override suspend fun receive(): R {
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TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
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}
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override suspend fun send(value: T) {
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TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
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}
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override suspend fun receiveBuffer(): Buffer<R> = outputChannel.receive()
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override suspend fun sendBuffer(buffer: Buffer<T>) {
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inputChannel.send(buffer)
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}
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}
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@ -1,7 +0,0 @@
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package scientifik.kmath.sequential
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import kotlinx.coroutines.CoroutineScope
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//class FFTProcessor(scope: CoroutineScope): AbstractDoubleProcessor(scope){
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//
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//}
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@ -1,144 +0,0 @@
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package scientifik.kmath.sequential
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import kotlinx.atomicfu.atomic
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import kotlinx.coroutines.CoroutineScope
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import kotlinx.coroutines.GlobalScope
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import kotlinx.coroutines.channels.*
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import kotlinx.coroutines.isActive
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import kotlinx.coroutines.launch
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import kotlinx.coroutines.sync.Mutex
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import scientifik.kmath.structures.Buffer
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import scientifik.kmath.structures.asBuffer
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import scientifik.kmath.structures.asSequence
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fun <T> Buffer<T>.asChannel(scope: CoroutineScope): ReceiveChannel<T> = scope.produce {
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for (i in (0 until size)) {
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send(get(i))
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}
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}
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interface DoubleProducer : Producer<Double> {
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suspend fun receiveArray(): Buffer<Double>
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}
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interface DoubleConsumer : Consumer<Double> {
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suspend fun sendArray(array: Buffer<Double>)
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}
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abstract class AbstractDoubleProducer(scope: CoroutineScope) : AbstractProducer<Double>(scope), DoubleProducer {
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override fun connectOutput(consumer: Consumer<Double>) {
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if (consumer is DoubleConsumer) {
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launch {
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while (this.isActive) {
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consumer.sendArray(receiveArray())
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}
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}
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} else {
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super.connectOutput(consumer)
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}
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}
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}
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abstract class AbstractDoubleConsumer(scope: CoroutineScope) : AbstractConsumer<Double>(scope), DoubleConsumer {
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override fun connectInput(producer: Producer<Double>) {
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if (producer is DoubleProducer) {
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launch {
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while (isActive) {
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sendArray(producer.receiveArray())
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}
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}
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} else {
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super.connectInput(producer)
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}
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}
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}
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abstract class AbstractDoubleProcessor(scope: CoroutineScope) : AbstractProcessor<Double, Double>(scope),
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DoubleProducer, DoubleConsumer {
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override fun connectOutput(consumer: Consumer<Double>) {
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if (consumer is DoubleConsumer) {
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launch {
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while (this.isActive) {
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consumer.sendArray(receiveArray())
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}
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}
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} else {
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super.connectOutput(consumer)
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}
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}
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override fun connectInput(producer: Producer<Double>) {
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if (producer is DoubleProducer) {
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launch {
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while (isActive) {
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sendArray(producer.receiveArray())
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}
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}
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} else {
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super.connectInput(producer)
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}
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}
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}
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/**
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* The basic [Double] producer supporting both arrays and element-by-element simultaneously
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*/
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class BasicDoubleProducer(
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scope: CoroutineScope,
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capacity: Int = Channel.UNLIMITED,
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block: suspend ProducerScope<Buffer<Double>>.() -> Unit
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) : AbstractDoubleProducer(scope) {
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private val currentArray = atomic<ReceiveChannel<Double>?>(null)
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private val channel: ReceiveChannel<Buffer<Double>> by lazy { produce(capacity = capacity, block = block) }
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private val cachingChannel by lazy {
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channel.map {
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it.also { doubles -> currentArray.lazySet(doubles.asChannel(this)) }
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}
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}
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private fun DoubleArray.asChannel() = produce {
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for (value in this@asChannel) {
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send(value)
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}
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}
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override suspend fun receiveArray(): Buffer<Double> = cachingChannel.receive()
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override suspend fun receive(): Double = (currentArray.value ?: cachingChannel.receive().asChannel(this)).receive()
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}
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class DoubleReducer<S>(
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scope: CoroutineScope,
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initialState: S,
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val fold: suspend (S, Buffer<Double>) -> S
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) : AbstractDoubleConsumer(scope) {
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var state: S = initialState
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private set
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override suspend fun sendArray(array: Buffer<Double>) {
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state = fold(state, array)
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}
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override suspend fun send(value: Double) = sendArray(doubleArrayOf(value).asBuffer())
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}
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/**
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* Convert an array to single element producer, splitting it in chunks if necessary
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*/
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fun Buffer<Double>.produce(scope: CoroutineScope = GlobalScope, chunkSize: Int = Int.MAX_VALUE) =
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if (size < chunkSize) {
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BasicDoubleProducer(scope) { send(this@produce) }
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} else {
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BasicDoubleProducer(scope) {
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//TODO optimize this!
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asSequence().chunked(chunkSize).forEach {
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send(it.asBuffer())
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}
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}
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}
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Block a user