ACPI_STATUS
AcpiUtUpdateObjectReference (
ACPI_OPERAND_OBJECT *Object,
UINT16 Action)
{
ACPI_STATUS Status = AE_OK;
ACPI_GENERIC_STATE *StateList = NULL;
ACPI_OPERAND_OBJECT *NextObject = NULL;
ACPI_OPERAND_OBJECT *PrevObject;
ACPI_GENERIC_STATE *State;
UINT32 i;
ACPI_FUNCTION_NAME (UtUpdateObjectReference);
while (Object)
{
/* Make sure that this isn't a namespace handle */
if (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
"Object %p is NS handle\n", Object));
return (AE_OK);
}
/*
* All sub-objects must have their reference count incremented also.
* Different object types have different subobjects.
*/
switch (Object->Common.Type)
{
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_POWER:
case ACPI_TYPE_THERMAL:
/*
* Update the notify objects for these types (if present)
* Two lists, system and device notify handlers.
*/
for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++)
{
PrevObject = Object->CommonNotify.NotifyList[i];
while (PrevObject)
{
NextObject = PrevObject->Notify.Next[i];
AcpiUtUpdateRefCount (PrevObject, Action);
PrevObject = NextObject;
}
}
break;
case ACPI_TYPE_PACKAGE:
/*
* We must update all the sub-objects of the package,
* each of whom may have their own sub-objects.
*/
for (i = 0; i < Object->Package.Count; i++)
{
/*
* Null package elements are legal and can be simply
* ignored.
*/
NextObject = Object->Package.Elements[i];
if (!NextObject)
{
continue;
}
switch (NextObject->Common.Type)
{
case ACPI_TYPE_INTEGER:
case ACPI_TYPE_STRING:
case ACPI_TYPE_BUFFER:
/*
* For these very simple sub-objects, we can just
* update the reference count here and continue.
* Greatly increases performance of this operation.
*/
AcpiUtUpdateRefCount (NextObject, Action);
break;
default:
/*
* For complex sub-objects, push them onto the stack
* for later processing (this eliminates recursion.)
*/
Status = AcpiUtCreateUpdateStateAndPush (
NextObject, Action, &StateList);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
break;
}
}
NextObject = NULL;
break;
case ACPI_TYPE_BUFFER_FIELD:
NextObject = Object->BufferField.BufferObj;
break;
case ACPI_TYPE_LOCAL_REGION_FIELD:
NextObject = Object->Field.RegionObj;
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
NextObject = Object->BankField.BankObj;
Status = AcpiUtCreateUpdateStateAndPush (
Object->BankField.RegionObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
break;
case ACPI_TYPE_LOCAL_INDEX_FIELD:
NextObject = Object->IndexField.IndexObj;
Status = AcpiUtCreateUpdateStateAndPush (
Object->IndexField.DataObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
break;
case ACPI_TYPE_LOCAL_REFERENCE:
/*
* The target of an Index (a package, string, or buffer) or a named
* reference must track changes to the ref count of the index or
* target object.
*/
if ((Object->Reference.Class == ACPI_REFCLASS_INDEX) ||
(Object->Reference.Class== ACPI_REFCLASS_NAME))
{
NextObject = Object->Reference.Object;
}
break;
case ACPI_TYPE_REGION:
default:
break; /* No subobjects for all other types */
}
/*
* Now we can update the count in the main object. This can only
* happen after we update the sub-objects in case this causes the
* main object to be deleted.
*/
AcpiUtUpdateRefCount (Object, Action);
Object = NULL;
/* Move on to the next object to be updated */
if (NextObject)
{
Object = NextObject;
NextObject = NULL;
}
else if (StateList)
{
State = AcpiUtPopGenericState (&StateList);
Object = State->Update.Object;
AcpiUtDeleteGenericState (State);
}
}
return (AE_OK);
ErrorExit:
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not update object reference count"));
/* Free any stacked Update State objects */
while (StateList)
{
State = AcpiUtPopGenericState (&StateList);
AcpiUtDeleteGenericState (State);
}
return (Status);
}
ACPI_STATUS
AcpiUtUpdateObjectReference (
ACPI_OPERAND_OBJECT *Object,
UINT16 Action)
{
ACPI_STATUS Status = AE_OK;
ACPI_GENERIC_STATE *StateList = NULL;
ACPI_OPERAND_OBJECT *NextObject = NULL;
ACPI_GENERIC_STATE *State;
UINT32 i;
ACPI_FUNCTION_TRACE_PTR (UtUpdateObjectReference, Object);
while (Object)
{
/* Make sure that this isn't a namespace handle */
if (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_NAMED)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS,
"Object %p is NS handle\n", Object));
return_ACPI_STATUS (AE_OK);
}
/*
* All sub-objects must have their reference count incremented also.
* Different object types have different subobjects.
*/
switch (Object->Common.Type)
{
case ACPI_TYPE_DEVICE:
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_POWER:
case ACPI_TYPE_THERMAL:
/* Update the notify objects for these types (if present) */
AcpiUtUpdateRefCount (Object->CommonNotify.SystemNotify, Action);
AcpiUtUpdateRefCount (Object->CommonNotify.DeviceNotify, Action);
break;
case ACPI_TYPE_PACKAGE:
/*
* We must update all the sub-objects of the package,
* each of whom may have their own sub-objects.
*/
for (i = 0; i < Object->Package.Count; i++)
{
/*
* Push each element onto the stack for later processing.
* Note: There can be null elements within the package,
* these are simply ignored
*/
Status = AcpiUtCreateUpdateStateAndPush (
Object->Package.Elements[i], Action, &StateList);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
}
break;
case ACPI_TYPE_BUFFER_FIELD:
NextObject = Object->BufferField.BufferObj;
break;
case ACPI_TYPE_LOCAL_REGION_FIELD:
NextObject = Object->Field.RegionObj;
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
NextObject = Object->BankField.BankObj;
Status = AcpiUtCreateUpdateStateAndPush (
Object->BankField.RegionObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
break;
case ACPI_TYPE_LOCAL_INDEX_FIELD:
NextObject = Object->IndexField.IndexObj;
Status = AcpiUtCreateUpdateStateAndPush (
Object->IndexField.DataObj, Action, &StateList);
if (ACPI_FAILURE (Status))
{
goto ErrorExit;
}
break;
case ACPI_TYPE_LOCAL_REFERENCE:
/*
* The target of an Index (a package, string, or buffer) or a named
* reference must track changes to the ref count of the index or
* target object.
*/
if ((Object->Reference.Class == ACPI_REFCLASS_INDEX) ||
(Object->Reference.Class== ACPI_REFCLASS_NAME))
{
NextObject = Object->Reference.Object;
}
break;
case ACPI_TYPE_REGION:
default:
break; /* No subobjects for all other types */
}
/*
* Now we can update the count in the main object. This can only
* happen after we update the sub-objects in case this causes the
* main object to be deleted.
*/
AcpiUtUpdateRefCount (Object, Action);
Object = NULL;
/* Move on to the next object to be updated */
if (NextObject)
{
Object = NextObject;
NextObject = NULL;
}
else if (StateList)
{
State = AcpiUtPopGenericState (&StateList);
Object = State->Update.Object;
AcpiUtDeleteGenericState (State);
}
}
return_ACPI_STATUS (AE_OK);
ErrorExit:
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not update object reference count"));
/* Free any stacked Update State objects */
while (StateList)
{
State = AcpiUtPopGenericState (&StateList);
AcpiUtDeleteGenericState (State);
}
return_ACPI_STATUS (Status);
}