com.trolltech.qt.core
Class QSystemSemaphore.AccessMode

java.lang.Object
  extended by java.lang.Enum
      extended by com.trolltech.qt.core.QSystemSemaphore.AccessMode
All Implemented Interfaces:
QtEnumerator, java.io.Serializable, java.lang.Comparable
Enclosing class:
QSystemSemaphore

public static final class QSystemSemaphore.AccessMode
extends java.lang.Enum
implements QtEnumerator

This enum is used by the constructor and setKey(). Its purpose is to enable handling the problem in Unix implementations of semaphores that survive a crash. In Unix, when a semaphore survives a crash, we need a way to force it to reset its resource count, when the system reuses the semaphore. In Windows, where semaphores can't survive a crash, this enum has no effect.

See Also:
Serialized Form

Field Summary
static QSystemSemaphore.AccessMode Create
          QSystemSemaphore takes ownership of the semaphore and sets its resource count to the requested value, regardless of whether the semaphore already exists by having survived a crash.
static QSystemSemaphore.AccessMode Open
          If the semaphore already exists, its initial resource count is not reset.
 
Method Summary
static QSystemSemaphore.AccessMode resolve(int value)
          Returns the QSystemSemaphore$AccessMode constant with the specified int.
 int value()
          This function should return an integer value for the enum values of the enumeration that implements this interface.
static QSystemSemaphore.AccessMode valueOf(java.lang.String name)
           
static QSystemSemaphore.AccessMode[] values()
           
 
Methods inherited from class java.lang.Enum
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
 
Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait
 

Field Detail

Open

public static final QSystemSemaphore.AccessMode Open
If the semaphore already exists, its initial resource count is not reset. If the semaphore does not already exist, it is created and its initial resource count set.


Create

public static final QSystemSemaphore.AccessMode Create
QSystemSemaphore takes ownership of the semaphore and sets its resource count to the requested value, regardless of whether the semaphore already exists by having survived a crash. This value should be passed to the constructor, when the first semaphore for a particular key is constructed and you know that if the semaphore already exists it could only be because of a crash. In Windows, where a semaphore can't survive a crash, Create and Open have the same behavior.

Method Detail

values

public static QSystemSemaphore.AccessMode[] values()

valueOf

public static QSystemSemaphore.AccessMode valueOf(java.lang.String name)

value

public int value()
This function should return an integer value for the enum values of the enumeration that implements this interface.

Specified by:
value in interface QtEnumerator

resolve

public static QSystemSemaphore.AccessMode resolve(int value)
Returns the QSystemSemaphore$AccessMode constant with the specified int.