com.oracle.svm.core.thread

Class VMOperation

java.lang.Object

com.oracle.svm.core.thread.VMOperationControl.AllocationFreeStack.Element<VMOperation>

com.oracle.svm.core.thread.VMOperation

Direct Known Subclasses:

GCImpl.CollectionVMOperation, HeapVerifierImpl.VerifyVMOperation, MemoryWalkerImpl.MemoryWalkerVMOperation, VMOperation.ThunkOperation

public abstract class VMOperation
extends VMOperationControl.AllocationFreeStack.Element<VMOperation>

The abstract base class of all VM operations.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	VMOperation.CallerEffect A VMOperation either blocks the caller or it does not.
static class	VMOperation.SystemEffect A VMOperation either causes a safepoint or it does not.
static class	VMOperation.ThunkOperation A VMOperation that executes a thunk.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	VMOperation(String name, VMOperation.CallerEffect callerEffect, VMOperation.SystemEffect systemEffect) Constructor for sub-classes.

Method Summary

Modifier and Type	Method and Description
void	enqueue() Public interface: Queue the operation for execution.
static void	enqueueBlockingNoSafepoint(String name, SubstrateUtil.Thunk thunk) Convenience method for thunks that can be run by allocating a VMOperation.
static void	enqueueBlockingSafepoint(String name, SubstrateUtil.Thunk thunk) Convenience method for thunks that can be run by allocating a VMOperation.
protected void	execute() What it means to execute an operation.
protected String	getName()
protected org.graalvm.nativeimage.IsolateThread	getQueuingVMThread()
static void	guaranteeInProgress(String message) Check that there is a VMOperation in progress.
static void	guaranteeNotInProgress(String message) Check that there is not a VMOperation in progress.
static boolean	isInProgress()
protected abstract void	operate() Do whatever it is that this VM operation does.

Methods inherited from class java.lang.Object

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

Constructor Detail

VMOperation

protected VMOperation(String name,
                      VMOperation.CallerEffect callerEffect,
                      VMOperation.SystemEffect systemEffect)

Constructor for sub-classes.

Method Detail

enqueue

public final void enqueue()

Public interface: Queue the operation for execution.

enqueueBlockingSafepoint

public static void enqueueBlockingSafepoint(String name,
                                            SubstrateUtil.Thunk thunk)

Convenience method for thunks that can be run by allocating a VMOperation.

enqueueBlockingNoSafepoint

public static void enqueueBlockingNoSafepoint(String name,
                                              SubstrateUtil.Thunk thunk)

Convenience method for thunks that can be run by allocating a VMOperation.

execute

protected final void execute()

What it means to execute an operation.

isInProgress

public static boolean isInProgress()

guaranteeInProgress

public static void guaranteeInProgress(String message)

Check that there is a VMOperation in progress.

guaranteeNotInProgress

public static void guaranteeNotInProgress(String message)

Check that there is not a VMOperation in progress.

operate

protected abstract void operate()

Do whatever it is that this VM operation does.

getName

protected final String getName()

getQueuingVMThread

protected final org.graalvm.nativeimage.IsolateThread getQueuingVMThread()