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JBoss API: Class Semaphore

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org.jboss.util
Class Semaphore

java.lang.Object
  |
  +--org.jboss.util.Semaphore

All Implemented Interfaces:: Sync

Direct Known Subclasses:: BeanSemaphore, WaitSemaphore

public class Semaphore
extends java.lang.Object
implements Sync

Semaphore that can allow a specified number of threads to enter, blocking the others. If the specified number of threads is 1, it acts as an exclusive semaphore and can be used instead of synchronized blocks

Version:: $Revision: 1.2.4.1 $
Author:: Simone Bordet (simone.bordet@compaq.com)

Constructor Summary

Semaphore(int allowed)


Method Summary

void acquire()
          Acquires this sync

int getUsers()


protected void logAcquire()


protected void logDeadlock()


protected void logRelease()


void release()
          Releases this sync

java.lang.String toString()


protected boolean waitImpl(java.lang.Object lock)


Methods inherited from class java.lang.Object

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

Constructor Detail

Semaphore

public Semaphore(int allowed)

Method Detail

getUsers

public int getUsers()

acquire

public void acquire()
             throws java.lang.InterruptedException

Description copied from interface: Sync

Acquires this sync

Specified by:: acquire in interface Sync

Following copied from interface: org.jboss.util.Sync

See Also:: Sync.release()

release

public void release()