gov.nist.javax.sip.stack

Class KeyedSemaphore

java.lang.Object

gov.nist.javax.sip.stack.KeyedSemaphore

public final class KeyedSemaphore
extends Object

Constructor Summary

Constructors

Constructor and Description
KeyedSemaphore()

Method Summary

Methods

Modifier and Type	Method and Description
void	enterIOCriticalSection(String key)
int	getNumberOfSemaphores()
void	leaveIOCriticalSection(String key)
void	remove(String key) It is assumed the current thread has locked the lock previously.

Methods inherited from class java.lang.Object

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

Constructor Detail

KeyedSemaphore

public KeyedSemaphore()

Method Detail

leaveIOCriticalSection

public void leaveIOCriticalSection(String key)

remove

public void remove(String key)

It is assumed the current thread has locked the lock previously. Under this assumption is safer to unlock after removal, so any blocked thread on waiting removed block may proceed without timeout. Only remove if no other threads are already waiting on this lock, otherwise unexpected behaviour may arise by locking one lock object, and trying to release another instance of lock for the same key.

Parameters:

key -

enterIOCriticalSection

public void enterIOCriticalSection(String key)
                            throws IOException

Throws:

IOException

getNumberOfSemaphores

public int getNumberOfSemaphores()