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| java.lang.Object
 com.hp.hpl.jena.shared.LockMRSW
All known Subclasses: com.hp.hpl.jena.rdf.model.impl.ModelLockImpl,
| LockMRSW | | public class LockMRSW implements Lock(Code) | | Lock implemenetation using a Multiple Reader, Single Writer policy.
All the locking work is done by the imported WriterPreferenceReadWriteLock.
Ths class adds:
- The same thread that acquired a lock should release it
- Lock promotion (turning read locks into write locks) is
deteched as an error
author:
Andy Seaborne
version:
$Id: LockMRSW.java,v 1.5 2008/01/02 12:06:11 andy_seaborne Exp $ |
| Inner Class :static class LockState | |
| Method Summary | |
| final public void | enterCriticalSection(boolean readLockRequested)
Application controlled locking - enter a critical section.
Locking is reentrant so an application can have nested critical sections.
Typical code:
try {
enterCriticalSection(Lock.READ) ;
... | | synchronized LockState | getLockState()
| | final public void | leaveCriticalSection()
Application controlled locking - leave a critical section. | | synchronized void | removeLockState(Thread thread)
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| activeReadLocks | | SynchronizedInt activeReadLocks(Code) | | |
| activeWriteLocks | | SynchronizedInt activeWriteLocks(Code) | | |
| mrswLock | | WriterPreferenceReadWriteLock mrswLock(Code) | | |
| threadStatesSize | | int threadStatesSize(Code) | | |
| LockMRSW | | public LockMRSW()(Code) | | |
| enterCriticalSection | | final public void enterCriticalSection(boolean readLockRequested)(Code) | | Application controlled locking - enter a critical section.
Locking is reentrant so an application can have nested critical sections.
Typical code:
try {
enterCriticalSection(Lock.READ) ;
... application code ...
} finally { leaveCriticalSection() ; }
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| getLockState | | synchronized LockState getLockState()(Code) | | |
| removeLockState | | synchronized void removeLockState(Thread thread)(Code) | | |
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