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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2011, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.collection.parallel
import java.util.concurrent.ThreadPoolExecutor
import scala.concurrent.forkjoin.ForkJoinPool
import scala.concurrent.ExecutionContext
/** A trait implementing the scheduling of
* a parallel collection operation.
*
* Task support objects handle how a task is split and
* distributed across processors. A task support object can be
* changed in a parallel collection after it has been created,
* but only during a quiescent period, i.e. while there are no
* concurrent invocations to parallel collection methods.
*/
trait TaskSupport extends Tasks
/** A task support that uses a fork join pool to schedule tasks */
class ForkJoinTaskSupport(val environment: ForkJoinPool = ForkJoinTasks.defaultForkJoinPool)
extends TaskSupport with AdaptiveWorkStealingForkJoinTasks
/** A task support that uses a thread pool executor to schedule tasks */
class ThreadPoolTaskSupport(val environment: ThreadPoolExecutor = ThreadPoolTasks.defaultThreadPool)
extends TaskSupport with AdaptiveWorkStealingThreadPoolTasks
/** A task support that uses an execution context to schedule tasks.
*
* It can be used with the default execution context implementation in the `scala.concurrent` package.
* It internally forwards the call to either a forkjoin based task support or a thread pool executor one,
* depending on what the execution context uses.
*
* By default, parallel collections are parametrized with this task support object, so parallel collections
* share the same execution context backend as the rest of the `scala.concurrent` package.
*/
class ExecutionContextTaskSupport(val environment: ExecutionContext = scala.concurrent.executionContext)
extends TaskSupport with ExecutionContextTasks
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