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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2010, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.concurrent
import java.lang.Thread
/** The <code>ThreadRunner</code> trait...
*
* @author Philipp Haller
*/
class ThreadRunner extends FutureTaskRunner {
type Task[T] = () => T
type Future[T] = () => T
implicit def functionAsTask[S](fun: () => S): Task[S] = fun
implicit def futureAsFunction[S](x: Future[S]): () => S = x
/* If expression computed successfully return it in `Right`,
* otherwise return exception in `Left`.
*/
private def tryCatch[A](body: => A): Either[Exception, A] =
try Right(body) catch {
case ex: Exception => Left(ex)
}
def execute[S](task: Task[S]) {
val runnable = new Runnable {
def run() { tryCatch(task()) }
}
(new Thread(runnable)).start()
}
def submit[S](task: Task[S]): Future[S] = {
val result = new SyncVar[Either[Exception, S]]
val runnable = new Runnable {
def run() { result set tryCatch(task()) }
}
(new Thread(runnable)).start()
() => result.get.fold[S](throw _, identity _)
}
def managedBlock(blocker: ManagedBlocker) {
blocker.block()
}
def shutdown() {
// do nothing
}
}
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