utils: Remove unused StateFlow

This change removes the unused StateFlow from the utils module. It has
been replaced by the proper implementation in the kotlinx-coroutines
library.

1 files changed, 0 insertions, 79 deletions

diff --git a/simulator/opendc-utils/src/main/kotlin/org/opendc/utils/flow/StateFlow.kt b/simulator/opendc-utils/src/main/kotlin/org/opendc/utils/flow/StateFlow.kt
deleted file mode 100644
index 996e7700..00000000
--- a/simulator/opendc-utils/src/main/kotlin/org/opendc/utils/flow/StateFlow.kt
+++ /dev/null
@@ -1,79 +0,0 @@
-/*
- * Copyright (c) 2020 AtLarge Research
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in all
- * copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
-package org.opendc.utils.flow
-
-import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.FlowPreview
-import kotlinx.coroutines.InternalCoroutinesApi
-import kotlinx.coroutines.channels.BroadcastChannel
-import kotlinx.coroutines.channels.ConflatedBroadcastChannel
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.FlowCollector
-import kotlinx.coroutines.flow.asFlow
-
-/**
- * A [Flow] that contains a single value that changes over time.
- *
- * This class exists to implement the DataFlow/StateFlow functionality that will be implemented in `kotlinx-coroutines`
- * in the future, but is not available yet.
- * See: https://github.com/Kotlin/kotlinx.coroutines/pull/1354
- */
-public interface StateFlow<T> : Flow<T> {
-    /**
-     * The current value of this flow.
-     *
-     * Setting a value that is [equal][Any.equals] to the previous one does nothing.
-     */
-    public var value: T
-}
-
-/**
- * Creates a [StateFlow] with a given initial [value].
- */
-@Suppress("FunctionName")
-public fun <T> StateFlow(value: T): StateFlow<T> = StateFlowImpl(value)
-
-/**
- * Internal implementation of the [StateFlow] interface.
- */
-@OptIn(ExperimentalCoroutinesApi::class, FlowPreview::class)
-private class StateFlowImpl<T>(initialValue: T) : StateFlow<T> {
-    /**
-     * The [BroadcastChannel] to back this flow.
-     */
-    private val chan = ConflatedBroadcastChannel(initialValue)
-
-    /**
-     * The internal [Flow] backing this flow.
-     */
-    private val flow = chan.asFlow()
-
-    public override var value: T = initialValue
-        set(value) {
-            chan.offer(value)
-            field = value
-        }
-
-    @InternalCoroutinesApi
-    override suspend fun collect(collector: FlowCollector<T>) = flow.collect(collector)
-}