org.openorb.ccs.kernel
Class LockSet

java.lang.Object
  org.omg.PortableServer.Servant
      org.omg.CosConcurrencyControl.LockSetPOA
          org.openorb.ccs.kernel.LockSet

All Implemented Interfaces:

org.omg.CORBA.portable.InvokeHandler, LockSetOperations

public class LockSet
extends LockSetPOA

This class provides operatiosn to acquire and release locks

Author:

Marina Daniel

Constructor Summary

LockSet()

Method Summary

void	change_mode(lock_mode held_mode, lock_mode new_mode) Changes the mode of a single lock.
boolean	isLockable(lock_mode mode) return whether the current lock mode permits the required lock mode
void	lock(lock_mode mode) Acquires a lock on the specified lock set in the specified mode
void	setRelatedLockSet(LockSet related_lockset) sets the related lock set
boolean	try_lock(lock_mode mode) Attempts to acquire a lock on the specified lock set.
void	unlock(lock_mode mode) Drops a single lock on the specified lock set in the specified mode.

Methods inherited from class org.omg.CosConcurrencyControl.LockSetPOA

_all_interfaces, _invoke, _this, _this

Methods inherited from class org.omg.PortableServer.Servant

_default_POA, _get_delegate, _get_interface_def, _is_a, _non_existent, _object_id, _orb, _poa, _set_delegate, _this_object, _this_object

Methods inherited from class java.lang.Object

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

Constructor Detail

LockSet

public LockSet()

Method Detail

lock

public void lock(lock_mode mode)

Acquires a lock on the specified lock set in the specified mode

Parameters:

mode - the specified mode

try_lock

public boolean try_lock(lock_mode mode)

Attempts to acquire a lock on the specified lock set.

Parameters:

mode - The lock mode.

Returns:

True when the lock was successful, false otherwise.

unlock

public void unlock(lock_mode mode)
            throws LockNotHeld

Drops a single lock on the specified lock set in the specified mode.

Parameters:

mode - The lock mode.

Throws:

LockNotHeld - If being called to a lock that is not held.

change_mode

public void change_mode(lock_mode held_mode,
                        lock_mode new_mode)
                 throws LockNotHeld

Changes the mode of a single lock.

Parameters:

held_mode - The current held mode.

new_mode - The new mode.

Throws:

LockNotHeld - Thrown when when no lock is held.

isLockable

public boolean isLockable(lock_mode mode)

return whether the current lock mode permits the required lock mode

Parameters:

mode - the required lock mode

Returns:

true if the lock set can be locked to this mode

setRelatedLockSet

public void setRelatedLockSet(LockSet related_lockset)

sets the related lock set

Parameters:

related_lockset - the related lock set