refactor: Replace use of CoroutineContext by Dispatcher

This change replaces the use of `CoroutineContext` for passing the
`SimulationDispatcher` across the different modules of OpenDC by the
lightweight `Dispatcher` interface of the OpenDC common module.

1 files changed, 0 insertions, 94 deletions

diff --git a/opendc-common/src/main/kotlin/org/opendc/common/util/Pacer.kt b/opendc-common/src/main/kotlin/org/opendc/common/util/Pacer.kt
deleted file mode 100644
index b6141db1..00000000
--- a/opendc-common/src/main/kotlin/org/opendc/common/util/Pacer.kt
+++ /dev/null
@@ -1,94 +0,0 @@
-/*
- * Copyright (c) 2022 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.common.util
-
-import kotlinx.coroutines.Delay
-import kotlinx.coroutines.DisposableHandle
-import kotlinx.coroutines.InternalCoroutinesApi
-import java.lang.Runnable
-import java.time.InstantSource
-import kotlin.coroutines.ContinuationInterceptor
-import kotlin.coroutines.CoroutineContext
-
-/**
- * Helper class to pace the incoming scheduling requests.
- *
- * @param context The [CoroutineContext] in which the pacer runs.
- * @param clock The virtual simulation clock.
- * @param quantum The scheduling quantum.
- * @param process The process to invoke for the incoming requests.
- */
-public class Pacer(
-    private val context: CoroutineContext,
-    private val clock: InstantSource,
-    private val quantum: Long,
-    private val process: (Long) -> Unit
-) {
-    /**
-     * The [Delay] instance that provides scheduled execution of [Runnable]s.
-     */
-    @OptIn(InternalCoroutinesApi::class)
-    private val delay =
-        requireNotNull(context[ContinuationInterceptor] as? Delay) { "Invalid CoroutineDispatcher: no delay implementation" }
-
-    /**
-     * The current [DisposableHandle] representing the pending scheduling cycle.
-     */
-    private var handle: DisposableHandle? = null
-
-    /**
-     * Determine whether a scheduling cycle is pending.
-     */
-    public val isPending: Boolean get() = handle != null
-
-    /**
-     * Enqueue a new scheduling cycle.
-     */
-    public fun enqueue() {
-        if (handle != null) {
-            return
-        }
-
-        val quantum = quantum
-        val now = clock.millis()
-
-        // We assume that the scheduler runs at a fixed slot every time quantum (e.g t=0, t=60, t=120).
-        // We calculate here the delay until the next scheduling slot.
-        val timeUntilNextSlot = quantum - (now % quantum)
-
-        @OptIn(InternalCoroutinesApi::class)
-        handle = delay.invokeOnTimeout(timeUntilNextSlot, {
-            process(now + timeUntilNextSlot)
-            handle = null
-        }, context)
-    }
-
-    /**
-     * Cancel the currently pending scheduling cycle.
-     */
-    public fun cancel() {
-        val handle = handle ?: return
-        this.handle = null
-        handle.dispose()
-    }
-}