orc.runtime
Class Kilim

java.lang.Object
  orc.runtime.Kilim

public final class Kilim
extends java.lang.Object

Utility methods for Kilim.

Author:

quark

Nested Class Summary

static class	Kilim.PausableCallable<V> Pausable computation which returns a value.
static class	Kilim.Promise<V> Wrap a callable in a lazy, concurrency-safe promise.

Field Summary

static java.lang.Object

signal Kilim mailboxes can't accomodate null values, so this acts as a basic signal or unit value when necessary.

Constructor Summary

Kilim()

Method Summary

static void	exit()
static void	runPausable(Token caller, Kilim.PausableCallable<? extends java.lang.Object> thunk) Utility method to run a pausable computation which generates a value for a token.
static <V> V	runThreaded(java.util.concurrent.Callable<V> thunk) Spawn a thread to compute a value.
static void	runThreaded(java.lang.Runnable thunk) Spawn a thread asynchronously.
static void	startEngine(int kilimThreads, int siteThreads) Initialize Kilim state for a new job.
static void	stopEngine() Shutdown Kilim threads created for the current job.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

signal

public static final java.lang.Object signal

Kilim mailboxes can't accomodate null values, so this acts as a basic signal or unit value when necessary.

Constructor Detail

Kilim

public Kilim()

Method Detail

startEngine

public static void startEngine(int kilimThreads,
                               int siteThreads)

Initialize Kilim state for a new job.

stopEngine

public static void stopEngine()

Shutdown Kilim threads created for the current job.

runThreaded

public static <V> V runThreaded(java.util.concurrent.Callable<V> thunk)
                     throws kilim.Pausable,
                            java.lang.Exception

Spawn a thread to compute a value. This is a common idiom in a Kilim computation, when you need to make blocking calls.

FIXME: I ran into about 5 different weird Kilim bugs trying to write this function; the current structure is not ideal but it was the only one which worked.

FIXME: Kilim mailboxes cannot handle null messages so we always have to return some object.

Throws:

kilim.Pausable

java.lang.Exception

runThreaded

public static void runThreaded(java.lang.Runnable thunk)
                        throws kilim.Pausable

Spawn a thread asynchronously. If you want to block until the thread is complete, use runThreaded(Callable). The point of this over new Thread() { ... }.start() is that this uses a thread pool.

Parameters:

thunk -

Throws:

kilim.Pausable

runPausable

public static void runPausable(Token caller,
                               Kilim.PausableCallable<? extends java.lang.Object> thunk)

Utility method to run a pausable computation which generates a value for a token.

Parameters:

caller - token to return the value to

thunk - computation returning a value

exit

public static void exit()
                 throws kilim.Pausable

Throws:

kilim.Pausable