com.oracle.svm.core.monitor

Class SingleThreadedMonitorSupport

java.lang.Object

com.oracle.svm.core.monitor.MonitorSupport

com.oracle.svm.core.monitor.SingleThreadedMonitorSupport

public class SingleThreadedMonitorSupport
extends MonitorSupport

Without support for threads, there is no need for any monitor operations.

Constructor Summary

Constructors

Constructor and Description
SingleThreadedMonitorSupport()

Method Summary

Modifier and Type	Method and Description
int	countThreadLock(org.graalvm.nativeimage.IsolateThread vmThread)
void	doRelockObject(Object obj, Object lockData)
protected void	doWait(Object obj, long timeoutMillis)
boolean	isLockedByAnyThread(Object obj) Determines whether the object's monitor is locked by the current or any other thread.
boolean	isLockedByCurrentThread(Object obj) Implements the semantics of Thread.holdsLock(java.lang.Object).
int	maybeAdjustNewParkStatus(int status) Called from Unsafe.park when changing the current thread's state before parking the thread.
void	monitorEnter(Object obj) Implements the semantics of the monitorenter bytecode.
void	monitorExit(Object obj) Implements the semantics of the monitorexit bytecode.
void	notify(Object obj, boolean notifyAll) Implements the semantics of Object.notify() and Object.notifyAll().
Object	prepareRelockObject(Object obj)

Methods inherited from class com.oracle.svm.core.monitor.MonitorSupport

singleton, wait

Methods inherited from class java.lang.Object

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

Constructor Detail

SingleThreadedMonitorSupport

public SingleThreadedMonitorSupport()

Method Detail

monitorEnter

public void monitorEnter(Object obj)

Description copied from class: MonitorSupport

Implements the semantics of the monitorenter bytecode.

Specified by:

monitorEnter in class MonitorSupport

monitorExit

public void monitorExit(Object obj)

Description copied from class: MonitorSupport

Implements the semantics of the monitorexit bytecode.

Specified by:

monitorExit in class MonitorSupport

prepareRelockObject

public Object prepareRelockObject(Object obj)

Specified by:

prepareRelockObject in class MonitorSupport

doRelockObject

public void doRelockObject(Object obj,
                           Object lockData)

Specified by:

doRelockObject in class MonitorSupport

isLockedByCurrentThread

public boolean isLockedByCurrentThread(Object obj)

Description copied from class: MonitorSupport

Implements the semantics of Thread.holdsLock(java.lang.Object).

Specified by:

isLockedByCurrentThread in class MonitorSupport

isLockedByAnyThread

public boolean isLockedByAnyThread(Object obj)

Description copied from class: MonitorSupport

Determines whether the object's monitor is locked by the current or any other thread.

Specified by:

isLockedByAnyThread in class MonitorSupport

countThreadLock

public int countThreadLock(org.graalvm.nativeimage.IsolateThread vmThread)

Specified by:

countThreadLock in class MonitorSupport

doWait

protected void doWait(Object obj,
                      long timeoutMillis)
               throws InterruptedException

Specified by:

doWait in class MonitorSupport

Throws:

InterruptedException

notify

public void notify(Object obj,
                   boolean notifyAll)

Description copied from class: MonitorSupport

Implements the semantics of Object.notify() and Object.notifyAll().

Specified by:

notify in class MonitorSupport

maybeAdjustNewParkStatus

public int maybeAdjustNewParkStatus(int status)

Description copied from class: MonitorSupport

Called from Unsafe.park when changing the current thread's state before parking the thread. When the thread is parked due to a monitor operation, we need to alter the new thread state so Thread.getState() gives the expected result.

Specified by:

maybeAdjustNewParkStatus in class MonitorSupport