iaik.pkcs.pkcs11

Class DefaultMutexHandler

java.lang.Object

iaik.pkcs.pkcs11.DefaultMutexHandler

All Implemented Interfaces:

MutexHandler

public class DefaultMutexHandler
extends java.lang.Object
implements MutexHandler

This class offers a default-implementation of a MutexHandler.

Version:

1.0

Author:

Karl Scheibelhofer

Constructor Summary

Constructors

Constructor and Description
DefaultMutexHandler()

Method Summary

Modifier and Type	Method and Description
java.lang.Object	createMutex() Create a new mutex object.
void	destroyMutex(java.lang.Object mutex) Destroy a mutex object.
void	lockMutex(java.lang.Object mutex) If this method is called on with a mutex object which is not locked, the calling thread obtains a lock on that mutex object and returns.
void	unlockMutex(java.lang.Object mutex) If this method is called with a mutex object which is locked by the calling thread, that mutex object is unlocked and the function call returns.

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultMutexHandler

public DefaultMutexHandler()

Method Detail

createMutex

public java.lang.Object createMutex()
                             throws PKCS11Exception

Create a new mutex object.

Specified by:

createMutex in interface MutexHandler

Returns:

The new mutex object.

Throws:

PKCS11Exception - If the wrapper should return a differnet value than CKR_OK to the library. It gets the error-code and returns it as CK_RV.

Postconditions:

(result != null)

destroyMutex

public void destroyMutex(java.lang.Object mutex)
                  throws PKCS11Exception

Destroy a mutex object.

Specified by:

destroyMutex in interface MutexHandler

Parameters:

mutex - The mutex object to destroy.

Throws:

PKCS11Exception - If the wrapper should return a differnet value than CKR_OK to the library. It gets the error-code and returns it as CK_RV.

Preconditions:

(mutex != null)

lockMutex

public void lockMutex(java.lang.Object mutex)
               throws PKCS11Exception

If this method is called on with a mutex object which is not locked, the calling thread obtains a lock on that mutex object and returns. If this method is called with a mutex object which is locked by some thread other than the calling thread, the calling thread blocks and waits for that mutex to be unlocked. If this method is called with a a mutex object which is locked by the calling + thread, the behavior of this method call is undefined.

Specified by:

lockMutex in interface MutexHandler

Parameters:

mutex - The mutex object to lock.

Throws:

PKCS11Exception - If the wrapper should return a differnet value than CKR_OK to the library. It gets the error-code and returns it as CK_RV.

Preconditions:

(mutex != null)

unlockMutex

public void unlockMutex(java.lang.Object mutex)
                 throws PKCS11Exception

If this method is called with a mutex object which is locked by the calling thread, that mutex object is unlocked and the function call returns. Furthermore: If exactly one thread was blocking on that particular mutex object, then that thread stops blocking, obtains a lock on that mutex object, and its lockMutex(Object) call returns. If more than one thread was blocking on that particular mutex objet, then exactly one of the blocking threads is selected somehow. That lucky thread stops blocking, obtains a lock on the mutex object, and its lockMutex(Object) call returns. All other threads blocking on that particular mutex object continue to block. If this method is called with a mutex object which is not locked, then the method call throws an exception with the error code PKCS11Constants.CKR_MUTEX_NOT_LOCKED. If this method is called with a mutex object which is locked by some thread other than the calling thread, the behavior of this method call is undefined.

Specified by:

unlockMutex in interface MutexHandler

Parameters:

mutex - The mutex object to unlock.

Throws:

PKCS11Exception - If the wrapper should return a differnet value than CKR_OK to the library. It gets the error-code and returns it as CK_RV.

Preconditions:

(mutex != null)