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Java Source Code / Java Documentation » Apache Harmony Java SE » java package » java.lang

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

java.lang .VMThreadManager

VMThreadManager

final class VMThreadManager (Code)

Provides the methods to interact with VM Thread Manager that are used by java.lang.Thread Thread class and java.lang.Object Object synchronization implementation.

A public constructor of the java.lang.Thread class should be called by the VM within startup phase to initialize the main thread. Note that the VMThread.currentThread() method should return a reference to the Thread object even if it hasn't been initialized yet.

This class must be implemented according to the common policy for porting interfaces - see the porting interface overview for more details.

Field Summary
final public static int	TM_ERROR_EBUSY
final public static int	TM_ERROR_ILLEGAL_STATE
final public static int	TM_ERROR_INTERRUPT
final public static int	TM_ERROR_NONE Thread Manager functions error codes.
final public static int	TM_THREAD_STATE_ALIVE
final public static int	TM_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER
final public static int	TM_THREAD_STATE_INTERRUPTED
final public static int	TM_THREAD_STATE_IN_NATIVE
final public static int	TM_THREAD_STATE_IN_OBJECT_WAIT
final public static int	TM_THREAD_STATE_PARKED
final public static int	TM_THREAD_STATE_RUNNABLE
final public static int	TM_THREAD_STATE_SLEEPING
final public static int	TM_THREAD_STATE_SUSPENDED
final public static int	TM_THREAD_STATE_TERMINATED
final public static int	TM_THREAD_STATE_VENDOR_1
final public static int	TM_THREAD_STATE_VENDOR_2
final public static int	TM_THREAD_STATE_VENDOR_3
final public static int	TM_THREAD_STATE_WAITING
final public static int	TM_THREAD_STATE_WAITING_INDEFINITELY
final public static int	TM_THREAD_STATE_WAITING_WITH_TIMEOUT

Method Summary
static Thread	currentThread()
native public static Thread	currentThreadNative() This method satisfies the requirements of the specification for the Thread.currentThread Thread.currentThread() method. But there is one special case.
native static int	getState(java.lang.Thread thread)
native static boolean	holdsLock(Object object) This method satisfies the requirements of the specification for the Thread.holdsLock(java.lang.Object) Thread.holdsLock(Object obj) method.
native static long	init(Thread thread, ThreadWeakRef ref, long oldAddr) This method initialize native thread structure as well as inter dependencies between java thread and native thread.
native static int	interrupt(Thread thread) This method satisfies the requirements of the specification for the Thread.interrupt Thread.interrupt() method.
native static boolean	isAlive(Thread thread) Checks if the specified thread is dead. Note: This method is used for the Thread.isAliveThread.isAlive() method implementation. Parameters: thread - the thread to check the status for.
native static boolean	isInterrupted() This method satisfies the requirements of the specification for the Thread.interrupted Thread.interrupted() method.
native static boolean	isInterrupted(Thread thread) This method satisfies the requirements of the specification for the Thread.isInterrupted Thread.isInterrupted() method.
native static int	notify(Object object) This method satisfies the requirements of the specification for the Object.notify Object.notify() method.
native static int	notifyAll(Object object) This method satisfies the requirements of the specification for the Object.notifyAll Object.notifyAll() method.
native static int	resume(Thread thread) This method satisfies the requirements of the specification for the Thread.resume Thread.resume() method.
native static int	setPriority(Thread thread, int priority) Changes the priority of the specified thread.
native static int	sleep(long millis, int nanos) This method satisfies the requirements of the specification for the Thread.sleep(longint) Thread.sleep(long timeout, int nanos) method.
native static int	start(Thread thread, long stackSize, boolean daemon, int priority) Starts the specified thread.
native static int	stop(Thread thread, Throwable throwable) This method satisfies the requirements of the specification for the Thread.stop(java.lang.Throwable) Thread.stop(Throwable obj) method.
native static int	suspend(Thread thread) This method satisfies the requirements of the specification for the Thread.suspend Thread.suspend() method.
native static int	wait(Object object, long millis, int nanos) This method satisfies the requirements of the specification for the Object.wait(longint) Object.wait(long timeout, int nanos) method.
native static int	yield() This method satisfies the requirements of the specification for the Thread.yield Thread.yield() method.

Field Detail

TM_ERROR_EBUSY
final public static int TM_ERROR_EBUSY(Code)

TM_ERROR_ILLEGAL_STATE
final public static int TM_ERROR_ILLEGAL_STATE(Code)

TM_ERROR_INTERRUPT
final public static int TM_ERROR_INTERRUPT(Code)

TM_ERROR_NONE
final public static int TM_ERROR_NONE(Code)
	Thread Manager functions error codes.

TM_THREAD_STATE_ALIVE
final public static int TM_THREAD_STATE_ALIVE(Code)
	JVMTI constants

TM_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER
final public static int TM_THREAD_STATE_BLOCKED_ON_MONITOR_ENTER(Code)

TM_THREAD_STATE_INTERRUPTED
final public static int TM_THREAD_STATE_INTERRUPTED(Code)

TM_THREAD_STATE_IN_NATIVE
final public static int TM_THREAD_STATE_IN_NATIVE(Code)

TM_THREAD_STATE_IN_OBJECT_WAIT
final public static int TM_THREAD_STATE_IN_OBJECT_WAIT(Code)

TM_THREAD_STATE_PARKED
final public static int TM_THREAD_STATE_PARKED(Code)

TM_THREAD_STATE_RUNNABLE
final public static int TM_THREAD_STATE_RUNNABLE(Code)

TM_THREAD_STATE_SLEEPING
final public static int TM_THREAD_STATE_SLEEPING(Code)

TM_THREAD_STATE_SUSPENDED
final public static int TM_THREAD_STATE_SUSPENDED(Code)

TM_THREAD_STATE_TERMINATED
final public static int TM_THREAD_STATE_TERMINATED(Code)

TM_THREAD_STATE_VENDOR_1
final public static int TM_THREAD_STATE_VENDOR_1(Code)

TM_THREAD_STATE_VENDOR_2
final public static int TM_THREAD_STATE_VENDOR_2(Code)

TM_THREAD_STATE_VENDOR_3
final public static int TM_THREAD_STATE_VENDOR_3(Code)

TM_THREAD_STATE_WAITING
final public static int TM_THREAD_STATE_WAITING(Code)

TM_THREAD_STATE_WAITING_INDEFINITELY
final public static int TM_THREAD_STATE_WAITING_INDEFINITELY(Code)

TM_THREAD_STATE_WAITING_WITH_TIMEOUT
final public static int TM_THREAD_STATE_WAITING_WITH_TIMEOUT(Code)

Method Detail

currentThread
static Thread currentThread()(Code)

currentThreadNative

native public static Thread currentThreadNative()(Code)

This method satisfies the requirements of the specification for the Thread.currentThread Thread.currentThread() method.

But there is one special case. When this method is called while initializing the main thread it should return a reference to the main thread object even if it hasn't been initialized yet.

In other words the condition (VMThreadManager.currentThread() == this) should be satisfied for java.lang.Thread object in the only case: this object was created by VM to represent the application's main thread and hasn't been initialized yet.

getState
native static int getState(java.lang.Thread thread)(Code)
	Returns the state of the given thread as described by JVMTI spec

holdsLock
native static boolean holdsLock(Object object)(Code)
	This method satisfies the requirements of the specification for the Thread.holdsLock(java.lang.Object) Thread.holdsLock(Object obj) method. But it doesn't throw an `NullPointerException` exception. The `object` argument must not be null.

init
native static long init(Thread thread, ThreadWeakRef ref, long oldAddr)(Code)
	This method initialize native thread structure as well as inter dependencies between java thread and native thread.

interrupt
native static int interrupt(Thread thread)(Code)
	This method satisfies the requirements of the specification for the Thread.interrupt Thread.interrupt() method.

isAlive
native static boolean isAlive(Thread thread)(Code)
	Checks if the specified thread is dead. Note: This method is used for the Thread.isAliveThread.isAlive() method implementation. Parameters: thread - the thread to check the status for. true if the thread has died already, false otherwise.

isInterrupted
native static boolean isInterrupted()(Code)
	This method satisfies the requirements of the specification for the Thread.interrupted Thread.interrupted() method.

isInterrupted
native static boolean isInterrupted(Thread thread)(Code)
	This method satisfies the requirements of the specification for the Thread.isInterrupted Thread.isInterrupted() method.

notify
native static int notify(Object object)(Code)
	This method satisfies the requirements of the specification for the Object.notify Object.notify() method.

notifyAll
native static int notifyAll(Object object)(Code)
	This method satisfies the requirements of the specification for the Object.notifyAll Object.notifyAll() method.

resume
native static int resume(Thread thread)(Code)
	This method satisfies the requirements of the specification for the Thread.resume Thread.resume() method.

setPriority
native static int setPriority(Thread thread, int priority)(Code)
	Changes the priority of the specified thread. Note: This method is used for the Thread.setPriority(int)Thread.setPriority(int newPriority) method implementation. Parameters: thread - the thread to change the priority for Parameters: priority - new priority value

sleep
native static int sleep(long millis, int nanos)(Code)
	This method satisfies the requirements of the specification for the Thread.sleep(longint) Thread.sleep(long timeout, int nanos) method. But it doesn't throw an `IllegalArgumentException` exception. The `millis` and `nanos` arguments must be valid.

start

native static int start(Thread thread, long stackSize, boolean daemon, int priority)(Code)

Starts the specified thread. Causes JVM to start executing run() method of the specified thread.

The method allows to set the stack size for the thread specified in its Thread.Thread(java.lang.ThreadGroupjava.lang.Runnablejava.lang.Stringlong) constructor .

Note: This method is used for the Thread.startThread.start() method implementation.
Parameters:
thread - the thread to be started
Parameters:
size - the desired stack size in bytes or zero to be ignored

stop
native static int stop(Thread thread, Throwable throwable)(Code)
	This method satisfies the requirements of the specification for the Thread.stop(java.lang.Throwable) Thread.stop(Throwable obj) method. But it doesn't throw an `NullPointerException` exception. The `throwable` argument must not be null.

suspend
native static int suspend(Thread thread)(Code)
	This method satisfies the requirements of the specification for the Thread.suspend Thread.suspend() method.

wait
native static int wait(Object object, long millis, int nanos) throws InterruptedException(Code)
	This method satisfies the requirements of the specification for the Object.wait(longint) Object.wait(long timeout, int nanos) method. But it doesn't throw an `IllegalArgumentException` exception. The `millis` and `nanos` arguments must be valid.

yield
native static int yield()(Code)
	This method satisfies the requirements of the specification for the Thread.yield Thread.yield() method.

Methods inherited from java.lang.Object

protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object object)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final public Class<? extends Object> getClass()(Code)(Java Doc)
public int hashCode()(Code)(Java Doc)
final public void notify()(Code)(Java Doc)
final public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final public void wait(long millis, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait(long millis) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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