commonMain.channels.ChannelCoroutine.kt Maven / Gradle / Ivy

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Coroutines support libraries for Kotlin

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/*
 * Copyright 2016-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
 */

package kotlinx.coroutines.channels

import kotlinx.coroutines.*
import kotlin.coroutines.*

@Suppress("DEPRECATION")
internal open class ChannelCoroutine(
    parentContext: CoroutineContext,
    protected val _channel: Channel,
    active: Boolean
) : AbstractCoroutine(parentContext, active), Channel by _channel {
    val channel: Channel get() = this

    override fun cancel() {
        cancelInternal(null)
    }

    @Deprecated(level = DeprecationLevel.HIDDEN, message = "Since 1.2.0, binary compatibility with versions <= 1.1.x")
    final override fun cancel(cause: Throwable?): Boolean =
        cancelInternal(cause)

    final override fun cancel(cause: CancellationException?) {
        cancelInternal(cause)
    }

    override fun cancelInternal(cause: Throwable?): Boolean {
        val exception = cause?.toCancellationException()
            ?: JobCancellationException("$classSimpleName was cancelled", null, this)
        _channel.cancel(exception) // cancel the channel
        cancelCoroutine(exception) // cancel the job
        return true // does not matter - result is used in DEPRECATED functions only
    }

    @Suppress("UNCHECKED_CAST")
    suspend fun sendFair(element: E) {
        (_channel as AbstractSendChannel).sendFair(element)
    }
}