patch-2.4.6 linux/drivers/acpi/common/cmdelete.c
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- Lines: 592
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.4.5/linux/drivers/acpi/common/cmdelete.c
- Orig date:
Mon Jan 22 13:23:42 2001
diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/common/cmdelete.c linux/drivers/acpi/common/cmdelete.c
@@ -1,591 +0,0 @@
-/*******************************************************************************
- *
- * Module Name: cmdelete - object deletion and reference count utilities
- * $Revision: 62 $
- *
- ******************************************************************************/
-
-/*
- * Copyright (C) 2000, 2001 R. Byron Moore
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-
-#include "acpi.h"
-#include "acinterp.h"
-#include "acnamesp.h"
-#include "actables.h"
-#include "acparser.h"
-
-#define _COMPONENT MISCELLANEOUS
- MODULE_NAME ("cmdelete")
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_cm_delete_internal_obj
- *
- * PARAMETERS: *Object - Pointer to the list to be deleted
- *
- * RETURN: None
- *
- * DESCRIPTION: Low level object deletion, after reference counts have been
- * updated (All reference counts, including sub-objects!)
- *
- ******************************************************************************/
-
-void
-acpi_cm_delete_internal_obj (
- ACPI_OPERAND_OBJECT *object)
-{
- void *obj_pointer = NULL;
- ACPI_OPERAND_OBJECT *handler_desc;
-
-
- if (!object) {
- return;
- }
-
- /*
- * 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:
-
- /* Free the actual string buffer */
-
- obj_pointer = object->string.pointer;
- break;
-
-
- case ACPI_TYPE_BUFFER:
-
- /* Free the actual buffer */
-
- obj_pointer = object->buffer.pointer;
- break;
-
-
- case ACPI_TYPE_PACKAGE:
-
- /*
- * 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;
-
-
- case ACPI_TYPE_MUTEX:
-
- acpi_os_delete_semaphore (object->mutex.semaphore);
- break;
-
-
- case ACPI_TYPE_EVENT:
-
- acpi_os_delete_semaphore (object->event.semaphore);
- object->event.semaphore = NULL;
- break;
-
-
- case ACPI_TYPE_METHOD:
-
- /* Delete the method semaphore if it exists */
-
- if (object->method.semaphore) {
- acpi_os_delete_semaphore (object->method.semaphore);
- object->method.semaphore = NULL;
- }
-
- break;
-
-
- case ACPI_TYPE_REGION:
-
-
- if (object->region.extra) {
- /*
- * 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.addr_handler;
- if ((handler_desc) &&
- (handler_desc->addr_handler.hflags == ADDR_HANDLER_DEFAULT_INSTALLED))
- {
- obj_pointer = object->region.extra->extra.region_context;
- }
-
- /* Now we can free the Extra object */
-
- acpi_cm_delete_object_desc (object->region.extra);
- }
- break;
-
-
- case ACPI_TYPE_FIELD_UNIT:
-
- if (object->field_unit.extra) {
- acpi_cm_delete_object_desc (object->field_unit.extra);
- }
- break;
-
- default:
- break;
- }
-
-
- /*
- * Delete any allocated memory found above
- */
-
- if (obj_pointer) {
- if (!acpi_tb_system_table_pointer (obj_pointer)) {
- acpi_cm_free (obj_pointer);
- }
- }
-
-
- /* Only delete the object if it was dynamically allocated */
-
-
- if (!(object->common.flags & AOPOBJ_STATIC_ALLOCATION)) {
- acpi_cm_delete_object_desc (object);
-
- }
-
- return;
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_cm_delete_internal_object_list
- *
- * PARAMETERS: *Obj_list - Pointer to the list to be deleted
- *
- * RETURN: Status - the status of the call
- *
- * DESCRIPTION: This function deletes an internal object list, including both
- * simple objects and package objects
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_cm_delete_internal_object_list (
- ACPI_OPERAND_OBJECT **obj_list)
-{
- ACPI_OPERAND_OBJECT **internal_obj;
-
-
- /* Walk the null-terminated internal list */
-
- for (internal_obj = obj_list; *internal_obj; internal_obj++) {
- /*
- * Check for a package
- * Simple objects are simply stored in the array and do not
- * need to be deleted separately.
- */
-
- if (IS_THIS_OBJECT_TYPE ((*internal_obj), ACPI_TYPE_PACKAGE)) {
- /* Delete the package */
-
- /*
- * TBD: [Investigate] This might not be the right thing to do,
- * depending on how the internal package object was allocated!!!
- */
- acpi_cm_delete_internal_obj (*internal_obj);
- }
-
- }
-
- /* Free the combined parameter pointer list and object array */
-
- acpi_cm_free (obj_list);
-
- return (AE_OK);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_cm_update_ref_count
- *
- * PARAMETERS: *Object - Object whose ref count is to be updated
- * Action - What to do
- *
- * RETURN: New ref count
- *
- * DESCRIPTION: Modify the ref count and return it.
- *
- ******************************************************************************/
-
-static void
-acpi_cm_update_ref_count (
- ACPI_OPERAND_OBJECT *object,
- u32 action)
-{
- u16 count;
- u16 new_count;
-
-
- if (!object) {
- return;
- }
-
-
- count = object->common.reference_count;
- new_count = count;
-
- /*
- * Reference count action (increment, decrement, or force delete)
- */
-
- switch (action)
- {
-
- case REF_INCREMENT:
-
- new_count++;
- object->common.reference_count = new_count;
-
- break;
-
-
- case REF_DECREMENT:
-
- if (count < 1) {
- new_count = 0;
- }
-
- else {
- new_count--;
-
- }
-
-
- object->common.reference_count = new_count;
- if (new_count == 0) {
- acpi_cm_delete_internal_obj (object);
- }
-
- break;
-
-
- case REF_FORCE_DELETE:
-
- new_count = 0;
- object->common.reference_count = new_count;
- acpi_cm_delete_internal_obj (object);
- break;
-
-
- default:
-
- break;
- }
-
-
- /*
- * Sanity check the reference count, for debug purposes only.
- * (A deleted object will have a huge reference count)
- */
-
-
- return;
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_cm_update_object_reference
- *
- * PARAMETERS: *Object - Increment ref count for this object
- * and all sub-objects
- * Action - Either REF_INCREMENT or REF_DECREMENT or
- * REF_FORCE_DELETE
- *
- * RETURN: Status
- *
- * DESCRIPTION: Increment the object reference count
- *
- * Object references are incremented when:
- * 1) An object is attached to a Node (namespace object)
- * 2) An object is copied (all subobjects must be incremented)
- *
- * Object references are decremented when:
- * 1) An object is detached from an Node
- *
- ******************************************************************************/
-
-ACPI_STATUS
-acpi_cm_update_object_reference (
- ACPI_OPERAND_OBJECT *object,
- u16 action)
-{
- ACPI_STATUS status;
- u32 i;
- ACPI_OPERAND_OBJECT *next;
- ACPI_OPERAND_OBJECT *new;
- ACPI_GENERIC_STATE *state_list = NULL;
- ACPI_GENERIC_STATE *state;
-
-
- /* Ignore a null object ptr */
-
- if (!object) {
- return (AE_OK);
- }
-
-
- /*
- * Make sure that this isn't a namespace handle or an AML pointer
- */
-
- if (VALID_DESCRIPTOR_TYPE (object, ACPI_DESC_TYPE_NAMED)) {
- return (AE_OK);
- }
-
- if (acpi_tb_system_table_pointer (object)) {
- return (AE_OK);
- }
-
-
- state = acpi_cm_create_update_state (object, action);
-
- while (state) {
-
- object = state->update.object;
- action = state->update.value;
- acpi_cm_delete_generic_state (state);
-
- /*
- * All sub-objects must have their reference count incremented also.
- * Different object types have different subobjects.
- */
- switch (object->common.type)
- {
-
- case ACPI_TYPE_DEVICE:
-
- status = acpi_cm_create_update_state_and_push (object->device.addr_handler,
- action, &state_list);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- acpi_cm_update_ref_count (object->device.sys_handler, action);
- acpi_cm_update_ref_count (object->device.drv_handler, action);
- break;
-
-
- case INTERNAL_TYPE_ADDRESS_HANDLER:
-
- /* Must walk list of address handlers */
-
- next = object->addr_handler.next;
- while (next) {
- new = next->addr_handler.next;
- acpi_cm_update_ref_count (next, action);
-
- next = new;
- }
- break;
-
-
- case ACPI_TYPE_PACKAGE:
-
- /*
- * We must update all the sub-objects of the package
- * (Each of whom may have their own sub-objects, etc.
- */
- 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 = acpi_cm_create_update_state_and_push (
- object->package.elements[i], action, &state_list);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- }
- break;
-
-
- case ACPI_TYPE_FIELD_UNIT:
-
- status = acpi_cm_create_update_state_and_push (
- object->field_unit.container, action, &state_list);
-
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- break;
-
-
- case INTERNAL_TYPE_DEF_FIELD:
-
- status = acpi_cm_create_update_state_and_push (
- object->field.container, action, &state_list);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- break;
-
-
- case INTERNAL_TYPE_BANK_FIELD:
-
- status = acpi_cm_create_update_state_and_push (
- object->bank_field.bank_select, action, &state_list);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
-
- status = acpi_cm_create_update_state_and_push (
- object->bank_field.container, action, &state_list);
- if (ACPI_FAILURE (status)) {
- return (status);
- }
- break;
-
-
- case ACPI_TYPE_REGION:
-
- /* TBD: [Investigate]
- Acpi_cm_update_ref_count (Object->Region.Addr_handler, Action);
- */
-/*
- Status =
- Acpi_cm_create_update_state_and_push (Object->Region.Addr_handler,
- Action, &State_list);
- if (ACPI_FAILURE (Status)) {
- return (Status);
- }
-*/
- break;
-
-
- case INTERNAL_TYPE_REFERENCE:
-
- break;
- }
-
-
- /*
- * 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.
- */
-
- acpi_cm_update_ref_count (object, action);
-
-
- /* Move on to the next object to be updated */
-
- state = acpi_cm_pop_generic_state (&state_list);
- }
-
-
- return (AE_OK);
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_cm_add_reference
- *
- * PARAMETERS: *Object - Object whose reference count is to be
- * incremented
- *
- * RETURN: None
- *
- * DESCRIPTION: Add one reference to an ACPI object
- *
- ******************************************************************************/
-
-void
-acpi_cm_add_reference (
- ACPI_OPERAND_OBJECT *object)
-{
-
-
- /*
- * Ensure that we have a valid object
- */
-
- if (!acpi_cm_valid_internal_object (object)) {
- return;
- }
-
- /*
- * We have a valid ACPI internal object, now increment the reference count
- */
-
- acpi_cm_update_object_reference (object, REF_INCREMENT);
-
- return;
-}
-
-
-/*******************************************************************************
- *
- * FUNCTION: Acpi_cm_remove_reference
- *
- * PARAMETERS: *Object - Object whose ref count will be decremented
- *
- * RETURN: None
- *
- * DESCRIPTION: Decrement the reference count of an ACPI internal object
- *
- ******************************************************************************/
-
-void
-acpi_cm_remove_reference (
- ACPI_OPERAND_OBJECT *object)
-{
-
-
- /*
- * Ensure that we have a valid object
- */
-
- if (!acpi_cm_valid_internal_object (object)) {
- return;
- }
-
- /*
- * Decrement the reference count, and only actually delete the object
- * if the reference count becomes 0. (Must also decrement the ref count
- * of all subobjects!)
- */
-
- acpi_cm_update_object_reference (object, REF_DECREMENT);
-
- return;
-}
-
-
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