org.ws4d.java.concurrency
Interface Lockable

All Known Subinterfaces:

LocalDevice

All Known Implementing Classes:

DefaultDevice, LockedList, LockedMap, LockedStructure, LockSupport

public interface Lockable

Method Summary

void	exclusiveLock() Acquires an exclusive lock.
boolean	releaseExclusiveLock() Releases an exclusive lock of the current thread.
void	releaseSharedLock() Releases a shared lock of the current thread.
void	sharedLock() Acquires a shared lock.
boolean	tryExclusiveLock() Try to get an exclusive lock immediately.
boolean	trySharedLock() Tries to get a shared lock immediately.

Method Detail

sharedLock

void sharedLock()

Acquires a shared lock. If the lock cannot be allocated immediately, the thread is blocked until allocation is possible.

exclusiveLock

void exclusiveLock()

Acquires an exclusive lock. If the lock cannot be allocated immediately, the thread is blocked until allocation is possible.

trySharedLock

boolean trySharedLock()

Tries to get a shared lock immediately.

Returns:

true if the lock has been allocated, false otherwise

tryExclusiveLock

boolean tryExclusiveLock()

Try to get an exclusive lock immediately.

Returns:

true if the lock has been allocated, false otherwise

releaseSharedLock

void releaseSharedLock()

Releases a shared lock of the current thread.

releaseExclusiveLock

boolean releaseExclusiveLock()

Releases an exclusive lock of the current thread.

Returns:

true = if last exclusive lock of this thread is released.