| /* |
| * Copyright 2016-2017 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package kotlinx.coroutines.experimental |
| |
| import java.util.concurrent.Executor |
| import java.util.concurrent.ScheduledExecutorService |
| import java.util.concurrent.TimeUnit |
| import kotlin.coroutines.experimental.Continuation |
| import kotlin.coroutines.experimental.CoroutineContext |
| |
| /** |
| * Converts an instance of [Executor] to an implementation of [CoroutineDispatcher]. |
| */ |
| public fun Executor.toCoroutineDispatcher(): CoroutineDispatcher = |
| ExecutorCoroutineDispatcher(this) |
| |
| internal open class ExecutorCoroutineDispatcher(val executor: Executor) : CoroutineDispatcher(), Delay { |
| override fun dispatch(context: CoroutineContext, block: Runnable) = executor.execute(block) |
| |
| override fun scheduleResumeAfterDelay(time: Long, unit: TimeUnit, continuation: CancellableContinuation<Unit>) { |
| val timeout = if (executor is ScheduledExecutorService) |
| executor.schedule(ResumeUndispatchedRunnable(this, continuation), time, unit) else |
| scheduledExecutor.schedule(ResumeRunnable(continuation), time, unit) |
| continuation.cancelFutureOnCompletion(timeout) |
| } |
| } |
| |
| // --- reusing these classes in other places --- |
| |
| internal class ResumeUndispatchedRunnable( |
| val dispatcher: CoroutineDispatcher, |
| val continuation: CancellableContinuation<Unit> |
| ) : Runnable { |
| override fun run() { |
| with(continuation) { dispatcher.resumeUndispatched(Unit) } |
| } |
| } |
| |
| internal class ResumeRunnable(val continuation: Continuation<Unit>) : Runnable { |
| override fun run() { |
| continuation.resume(Unit) |
| } |
| } |