in acpica/utdelete.c [36:318]
static void acpi_ut_delete_internal_obj(union acpi_operand_object *object)
{
void *obj_pointer = NULL;
union acpi_operand_object *handler_desc;
union acpi_operand_object *second_desc;
union acpi_operand_object *next_desc;
union acpi_operand_object *start_desc;
union acpi_operand_object **last_obj_ptr;
ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object);
if (!object) {
return_VOID;
}
/*
* Must delete or free any pointers within the object that are not
* actual ACPI objects (for example, a raw buffer pointer).
*/
switch (object->common.type) {
case ACPI_TYPE_STRING:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"**** String %p, ptr %p\n", object,
object->string.pointer));
/* Free the actual string buffer */
if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
/* But only if it is NOT a pointer into an ACPI table */
obj_pointer = object->string.pointer;
}
break;
case ACPI_TYPE_BUFFER:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"**** Buffer %p, ptr %p\n", object,
object->buffer.pointer));
/* Free the actual buffer */
if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
/* But only if it is NOT a pointer into an ACPI table */
obj_pointer = object->buffer.pointer;
}
break;
case ACPI_TYPE_PACKAGE:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
" **** Package of count %X\n",
object->package.count));
/*
* Elements of the package are not handled here, they are deleted
* separately
*/
/* Free the (variable length) element pointer array */
obj_pointer = object->package.elements;
break;
/*
* These objects have a possible list of notify handlers.
* Device object also may have a GPE block.
*/
case ACPI_TYPE_DEVICE:
if (object->device.gpe_block) {
(void)acpi_ev_delete_gpe_block(object->device.
gpe_block);
}
ACPI_FALLTHROUGH;
case ACPI_TYPE_PROCESSOR:
case ACPI_TYPE_THERMAL:
/* Walk the address handler list for this object */
handler_desc = object->common_notify.handler;
while (handler_desc) {
next_desc = handler_desc->address_space.next;
acpi_ut_remove_reference(handler_desc);
handler_desc = next_desc;
}
break;
case ACPI_TYPE_MUTEX:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"***** Mutex %p, OS Mutex %p\n",
object, object->mutex.os_mutex));
if (object == acpi_gbl_global_lock_mutex) {
/* Global Lock has extra semaphore */
(void)
acpi_os_delete_semaphore
(acpi_gbl_global_lock_semaphore);
acpi_gbl_global_lock_semaphore = NULL;
acpi_os_delete_mutex(object->mutex.os_mutex);
acpi_gbl_global_lock_mutex = NULL;
} else {
acpi_ex_unlink_mutex(object);
acpi_os_delete_mutex(object->mutex.os_mutex);
}
break;
case ACPI_TYPE_EVENT:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"***** Event %p, OS Semaphore %p\n",
object, object->event.os_semaphore));
(void)acpi_os_delete_semaphore(object->event.os_semaphore);
object->event.os_semaphore = NULL;
break;
case ACPI_TYPE_METHOD:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"***** Method %p\n", object));
/* Delete the method mutex if it exists */
if (object->method.mutex) {
acpi_os_delete_mutex(object->method.mutex->mutex.
os_mutex);
acpi_ut_delete_object_desc(object->method.mutex);
object->method.mutex = NULL;
}
if (object->method.node) {
object->method.node = NULL;
}
break;
case ACPI_TYPE_REGION:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"***** Region %p\n", object));
/*
* Update address_range list. However, only permanent regions
* are installed in this list. (Not created within a method)
*/
if (!(object->region.node->flags & ANOBJ_TEMPORARY)) {
acpi_ut_remove_address_range(object->region.space_id,
object->region.node);
}
second_desc = acpi_ns_get_secondary_object(object);
if (second_desc) {
/*
* Free the region_context if and only if the handler is one of the
* default handlers -- and therefore, we created the context object
* locally, it was not created by an external caller.
*/
handler_desc = object->region.handler;
if (handler_desc) {
next_desc =
handler_desc->address_space.region_list;
start_desc = next_desc;
last_obj_ptr =
&handler_desc->address_space.region_list;
/* Remove the region object from the handler list */
while (next_desc) {
if (next_desc == object) {
*last_obj_ptr =
next_desc->region.next;
break;
}
/* Walk the linked list of handlers */
last_obj_ptr = &next_desc->region.next;
next_desc = next_desc->region.next;
/* Prevent infinite loop if list is corrupted */
if (next_desc == start_desc) {
ACPI_ERROR((AE_INFO,
"Circular region list in address handler object %p",
handler_desc));
return_VOID;
}
}
if (handler_desc->address_space.handler_flags &
ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
/* Deactivate region and free region context */
if (handler_desc->address_space.setup) {
(void)handler_desc->
address_space.setup(object,
ACPI_REGION_DEACTIVATE,
handler_desc->
address_space.
context,
&second_desc->
extra.
region_context);
}
}
acpi_ut_remove_reference(handler_desc);
}
/* Now we can free the Extra object */
acpi_ut_delete_object_desc(second_desc);
}
if (object->field.internal_pcc_buffer) {
ACPI_FREE(object->field.internal_pcc_buffer);
}
break;
case ACPI_TYPE_BUFFER_FIELD:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"***** Buffer Field %p\n", object));
second_desc = acpi_ns_get_secondary_object(object);
if (second_desc) {
acpi_ut_delete_object_desc(second_desc);
}
break;
case ACPI_TYPE_LOCAL_BANK_FIELD:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"***** Bank Field %p\n", object));
second_desc = acpi_ns_get_secondary_object(object);
if (second_desc) {
acpi_ut_delete_object_desc(second_desc);
}
break;
case ACPI_TYPE_LOCAL_ADDRESS_HANDLER:
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"***** Address handler %p\n", object));
acpi_os_delete_mutex(object->address_space.context_mutex);
break;
default:
break;
}
/* Free any allocated memory (pointer within the object) found above */
if (obj_pointer) {
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
"Deleting Object Subptr %p\n", obj_pointer));
ACPI_FREE(obj_pointer);
}
/* Now the object can be safely deleted */
ACPI_DEBUG_PRINT_RAW((ACPI_DB_ALLOCATIONS,
"%s: Deleting Object %p [%s]\n",
ACPI_GET_FUNCTION_NAME, object,
acpi_ut_get_object_type_name(object)));
acpi_ut_delete_object_desc(object);
return_VOID;
}