ObReferenceObject

The ObReferenceObject routine increments the reference count to the given object.

VOID
  ObReferenceObject(
    IN PVOID  Object
    );

Parameter

Object

Pointer to the object. The caller obtained this parameter either when it created the object or from a preceding call to ObReferenceObjectByHandle after it opened the object.

Return Value

None

Headers

Declared in wdm.h and ntddk.h. Include wdm.h or ntddk.h.

Comments

ObReferenceObject simply increments the pointer reference count for an object, without making any access checks on the given object, as ObReferenceObjectByHandle and ObReferenceObjectByPointer do.

ObReferenceObject prevents deletion of the object at least until the driver subsequently calls its reciprocal, ObDereferenceObject, or closes the given object. The caller must decrement the reference count with ObDereferenceObject as soon as it is done with the object.

When the reference count for an object reaches zero, a kernel-mode component can remove the object from the system. However, a driver can remove only those objects that it created, and a driver should never attempt to remove any object that it did not create.

Callers of ObReferenceObject must be running at IRQL <= DISPATCH_LEVEL.

See Also

ObReferenceObjectByHandle, ObReferenceObjectByPointer, ObDereferenceObject, ZwClose