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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2005-2013, LAMP/EPFL **
** __\ \/ /__/ __ |/ /__/ __ | http://scala-lang.org/ **
** /____/\___/_/ |_/____/_/ | | **
** |/ **
\* */
package scala.actors
package scheduler
import scala.collection.mutable
/**
* This scheduler executes actor tasks on the current thread.
*
* @author Philipp Haller
*/
@deprecated("Use the akka.actor package instead. For migration from the scala.actors package refer to the Actors Migration Guide.", "2.11.0")
class SingleThreadedScheduler extends IScheduler {
private val tasks = new mutable.Queue[Runnable]
/** The maximum number of nested tasks that are run
* without unwinding the call stack.
*/
protected val maxNesting = 10
private var curNest = 0
private var isShutdown = false
def execute(task: Runnable) {
if (curNest < maxNesting) {
curNest += 1
task.run()
} else {
curNest = 0
tasks += task
}
}
def execute(fun: => Unit): Unit =
execute(new Runnable {
def run() { fun }
})
def shutdown() {
isShutdown = false
while (!tasks.isEmpty) {
val task = tasks.dequeue()
task.run()
}
isShutdown = true
}
def newActor(actor: TrackedReactor) {}
def terminated(actor: TrackedReactor) {}
// TODO: run termination handlers at end of shutdown.
def onTerminate(actor: TrackedReactor)(f: => Unit) {}
def isActive =
!isShutdown
def managedBlock(blocker: scala.concurrent.ManagedBlocker) {
blocker.block()
}
}
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