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/******************************************************************************
*
* Module Name: dswstate - Dispatcher parse tree walk management routines
* $Revision: 54 $
*
*****************************************************************************/
/*
* 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 "amlcode.h"
#include "acparser.h"
#include "acdispat.h"
#include "acnamesp.h"
#include "acinterp.h"
#define _COMPONENT ACPI_DISPATCHER
MODULE_NAME ("dswstate")
/*******************************************************************************
*
* FUNCTION: Acpi_ds_result_insert
*
* PARAMETERS: Object - Object to push
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Push an object onto this walk's result stack
*
******************************************************************************/
acpi_status
acpi_ds_result_insert (
void *object,
u32 index,
acpi_walk_state *walk_state)
{
acpi_generic_state *state;
PROC_NAME ("Ds_result_insert");
state = walk_state->results;
if (!state) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
walk_state));
return (AE_NOT_EXIST);
}
if (index >= OBJ_NUM_OPERANDS) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Index out of range: %X Obj=%p State=%p Num=%X\n",
index, object, walk_state, state->results.num_results));
return (AE_BAD_PARAMETER);
}
if (!object) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Null Object! Index=%X Obj=%p State=%p Num=%X\n",
index, object, walk_state, state->results.num_results));
return (AE_BAD_PARAMETER);
}
state->results.obj_desc [index] = object;
state->results.num_results++;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Obj=%p [%s] State=%p Num=%X Cur=%X\n",
object, object ? acpi_ut_get_type_name (((acpi_operand_object *) object)->common.type) : "NULL",
walk_state, state->results.num_results, walk_state->current_result));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_result_remove
*
* PARAMETERS: Object - Where to return the popped object
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
*
******************************************************************************/
acpi_status
acpi_ds_result_remove (
acpi_operand_object **object,
u32 index,
acpi_walk_state *walk_state)
{
acpi_generic_state *state;
PROC_NAME ("Ds_result_remove");
state = walk_state->results;
if (!state) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result object pushed! State=%p\n",
walk_state));
return (AE_NOT_EXIST);
}
if (index >= OBJ_NUM_OPERANDS) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Index out of range: %X State=%p Num=%X\n",
index, walk_state, state->results.num_results));
}
/* Check for a valid result object */
if (!state->results.obj_desc [index]) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Null operand! State=%p #Ops=%X, Index=%X\n",
walk_state, state->results.num_results, index));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove the object */
state->results.num_results--;
*object = state->results.obj_desc [index];
state->results.obj_desc [index] = NULL;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Obj=%p [%s] Index=%X State=%p Num=%X\n",
*object, (*object) ? acpi_ut_get_type_name ((*object)->common.type) : "NULL",
index, walk_state, state->results.num_results));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_result_pop
*
* PARAMETERS: Object - Where to return the popped object
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
*
******************************************************************************/
acpi_status
acpi_ds_result_pop (
acpi_operand_object **object,
acpi_walk_state *walk_state)
{
u32 index;
acpi_generic_state *state;
PROC_NAME ("Ds_result_pop");
state = walk_state->results;
if (!state) {
return (AE_OK);
}
if (!state->results.num_results) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Result stack is empty! State=%p\n",
walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove top element */
state->results.num_results--;
for (index = OBJ_NUM_OPERANDS; index; index--) {
/* Check for a valid result object */
if (state->results.obj_desc [index -1]) {
*object = state->results.obj_desc [index -1];
state->results.obj_desc [index -1] = NULL;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] Index=%X State=%p Num=%X\n",
*object, (*object) ? acpi_ut_get_type_name ((*object)->common.type) : "NULL",
index -1, walk_state, state->results.num_results));
return (AE_OK);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result objects! State=%p\n", walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_result_pop_from_bottom
*
* PARAMETERS: Object - Where to return the popped object
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop an object off the bottom of this walk's result stack. In
* other words, this is a FIFO.
*
******************************************************************************/
acpi_status
acpi_ds_result_pop_from_bottom (
acpi_operand_object **object,
acpi_walk_state *walk_state)
{
u32 index;
acpi_generic_state *state;
PROC_NAME ("Ds_result_pop_from_bottom");
state = walk_state->results;
if (!state) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Warning: No result object pushed! State=%p\n", walk_state));
return (AE_NOT_EXIST);
}
if (!state->results.num_results) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result objects! State=%p\n", walk_state));
return (AE_AML_NO_RETURN_VALUE);
}
/* Remove Bottom element */
*object = state->results.obj_desc [0];
/* Push entire stack down one element */
for (index = 0; index < state->results.num_results; index++) {
state->results.obj_desc [index] = state->results.obj_desc [index + 1];
}
state->results.num_results--;
/* Check for a valid result object */
if (!*object) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null operand! State=%p #Ops=%X, Index=%X\n",
walk_state, state->results.num_results, index));
return (AE_AML_NO_RETURN_VALUE);
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s], Results=%p State=%p\n",
*object, (*object) ? acpi_ut_get_type_name ((*object)->common.type) : "NULL",
state, walk_state));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_result_push
*
* PARAMETERS: Object - Where to return the popped object
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Push an object onto the current result stack
*
******************************************************************************/
acpi_status
acpi_ds_result_push (
acpi_operand_object *object,
acpi_walk_state *walk_state)
{
acpi_generic_state *state;
PROC_NAME ("Ds_result_push");
state = walk_state->results;
if (!state) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No result stack frame\n"));
return (AE_AML_INTERNAL);
}
if (state->results.num_results == OBJ_NUM_OPERANDS) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Result stack overflow: Obj=%p State=%p Num=%X\n",
object, walk_state, state->results.num_results));
return (AE_STACK_OVERFLOW);
}
if (!object) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Null Object! Obj=%p State=%p Num=%X\n",
object, walk_state, state->results.num_results));
return (AE_BAD_PARAMETER);
}
state->results.obj_desc [state->results.num_results] = object;
state->results.num_results++;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p Num=%X Cur=%X\n",
object, object ? acpi_ut_get_type_name (((acpi_operand_object *) object)->common.type) : "NULL",
walk_state, state->results.num_results, walk_state->current_result));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_result_stack_push
*
* PARAMETERS: Object - Object to push
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION:
*
******************************************************************************/
acpi_status
acpi_ds_result_stack_push (
acpi_walk_state *walk_state)
{
acpi_generic_state *state;
PROC_NAME ("Ds_result_stack_push");
state = acpi_ut_create_generic_state ();
if (!state) {
return (AE_NO_MEMORY);
}
state->common.data_type = ACPI_DESC_TYPE_STATE_RESULT;
acpi_ut_push_generic_state (&walk_state->results, state);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Results=%p State=%p\n",
state, walk_state));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_result_stack_pop
*
* PARAMETERS: Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION:
*
******************************************************************************/
acpi_status
acpi_ds_result_stack_pop (
acpi_walk_state *walk_state)
{
acpi_generic_state *state;
PROC_NAME ("Ds_result_stack_pop");
/* Check for stack underflow */
if (walk_state->results == NULL) {
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Underflow - State=%p\n",
walk_state));
return (AE_AML_NO_OPERAND);
}
state = acpi_ut_pop_generic_state (&walk_state->results);
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
"Result=%p Remaining_results=%X State=%p\n",
state, state->results.num_results, walk_state));
acpi_ut_delete_generic_state (state);
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_obj_stack_delete_all
*
* PARAMETERS: Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Clear the object stack by deleting all objects that are on it.
* Should be used with great care, if at all!
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_delete_all (
acpi_walk_state *walk_state)
{
u32 i;
FUNCTION_TRACE_PTR ("Ds_obj_stack_delete_all", walk_state);
/* The stack size is configurable, but fixed */
for (i = 0; i < OBJ_NUM_OPERANDS; i++) {
if (walk_state->operands[i]) {
acpi_ut_remove_reference (walk_state->operands[i]);
walk_state->operands[i] = NULL;
}
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_obj_stack_push
*
* PARAMETERS: Object - Object to push
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Push an object onto this walk's object/operand stack
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_push (
void *object,
acpi_walk_state *walk_state)
{
PROC_NAME ("Ds_obj_stack_push");
/* Check for stack overflow */
if (walk_state->num_operands >= OBJ_NUM_OPERANDS) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"overflow! Obj=%p State=%p #Ops=%X\n",
object, walk_state, walk_state->num_operands));
return (AE_STACK_OVERFLOW);
}
/* Put the object onto the stack */
walk_state->operands [walk_state->num_operands] = object;
walk_state->num_operands++;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
object, acpi_ut_get_type_name (((acpi_operand_object *) object)->common.type),
walk_state, walk_state->num_operands));
return (AE_OK);
}
#if 0
/*******************************************************************************
*
* FUNCTION: Acpi_ds_obj_stack_pop_object
*
* PARAMETERS: Pop_count - Number of objects/entries to pop
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
* deleted by this routine.
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_pop_object (
acpi_operand_object **object,
acpi_walk_state *walk_state)
{
PROC_NAME ("Ds_obj_stack_pop_object");
/* Check for stack underflow */
if (walk_state->num_operands == 0) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Missing operand/stack empty! State=%p #Ops=%X\n",
walk_state, walk_state->num_operands));
*object = NULL;
return (AE_AML_NO_OPERAND);
}
/* Pop the stack */
walk_state->num_operands--;
/* Check for a valid operand */
if (!walk_state->operands [walk_state->num_operands]) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Null operand! State=%p #Ops=%X\n",
walk_state, walk_state->num_operands));
*object = NULL;
return (AE_AML_NO_OPERAND);
}
/* Get operand and set stack entry to null */
*object = walk_state->operands [walk_state->num_operands];
walk_state->operands [walk_state->num_operands] = NULL;
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p [%s] State=%p #Ops=%X\n",
*object, acpi_ut_get_type_name ((*object)->common.type),
walk_state, walk_state->num_operands));
return (AE_OK);
}
#endif
/*******************************************************************************
*
* FUNCTION: Acpi_ds_obj_stack_pop
*
* PARAMETERS: Pop_count - Number of objects/entries to pop
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop this walk's object stack. Objects on the stack are NOT
* deleted by this routine.
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_pop (
u32 pop_count,
acpi_walk_state *walk_state)
{
u32 i;
PROC_NAME ("Ds_obj_stack_pop");
for (i = 0; i < pop_count; i++) {
/* Check for stack underflow */
if (walk_state->num_operands == 0) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Underflow! Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_STACK_UNDERFLOW);
}
/* Just set the stack entry to null */
walk_state->num_operands--;
walk_state->operands [walk_state->num_operands] = NULL;
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_obj_stack_pop_and_delete
*
* PARAMETERS: Pop_count - Number of objects/entries to pop
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Pop this walk's object stack and delete each object that is
* popped off.
*
******************************************************************************/
acpi_status
acpi_ds_obj_stack_pop_and_delete (
u32 pop_count,
acpi_walk_state *walk_state)
{
u32 i;
acpi_operand_object *obj_desc;
PROC_NAME ("Ds_obj_stack_pop_and_delete");
for (i = 0; i < pop_count; i++) {
/* Check for stack underflow */
if (walk_state->num_operands == 0) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Underflow! Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_STACK_UNDERFLOW);
}
/* Pop the stack and delete an object if present in this stack entry */
walk_state->num_operands--;
obj_desc = walk_state->operands [walk_state->num_operands];
if (obj_desc) {
acpi_ut_remove_reference (walk_state->operands [walk_state->num_operands]);
walk_state->operands [walk_state->num_operands] = NULL;
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Count=%X State=%p #Ops=%X\n",
pop_count, walk_state, walk_state->num_operands));
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_obj_stack_get_value
*
* PARAMETERS: Index - Stack index whose value is desired. Based
* on the top of the stack (index=0 == top)
* Walk_state - Current Walk state
*
* RETURN: Status
*
* DESCRIPTION: Retrieve an object from this walk's object stack. Index must
* be within the range of the current stack pointer.
*
******************************************************************************/
void *
acpi_ds_obj_stack_get_value (
u32 index,
acpi_walk_state *walk_state)
{
FUNCTION_TRACE_PTR ("Ds_obj_stack_get_value", walk_state);
/* Can't do it if the stack is empty */
if (walk_state->num_operands == 0) {
return_PTR (NULL);
}
/* or if the index is past the top of the stack */
if (index > (walk_state->num_operands - (u32) 1)) {
return_PTR (NULL);
}
return_PTR (walk_state->operands[(NATIVE_UINT)(walk_state->num_operands - 1) -
index]);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_get_current_walk_state
*
* PARAMETERS: Walk_list - Get current active state for this walk list
*
* RETURN: Pointer to the current walk state
*
* DESCRIPTION: Get the walk state that is at the head of the list (the "current"
* walk state.
*
******************************************************************************/
acpi_walk_state *
acpi_ds_get_current_walk_state (
acpi_walk_list *walk_list)
{
PROC_NAME ("Ds_get_current_walk_state");
ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Ds_get_current_walk_state, =%p\n",
walk_list->walk_state));
if (!walk_list) {
return (NULL);
}
return (walk_list->walk_state);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_push_walk_state
*
* PARAMETERS: Walk_state - State to push
* Walk_list - The list that owns the walk stack
*
* RETURN: None
*
* DESCRIPTION: Place the Walk_state at the head of the state list.
*
******************************************************************************/
void
acpi_ds_push_walk_state (
acpi_walk_state *walk_state,
acpi_walk_list *walk_list)
{
FUNCTION_TRACE ("Ds_push_walk_state");
walk_state->next = walk_list->walk_state;
walk_list->walk_state = walk_state;
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_pop_walk_state
*
* PARAMETERS: Walk_list - The list that owns the walk stack
*
* RETURN: A Walk_state object popped from the stack
*
* DESCRIPTION: Remove and return the walkstate object that is at the head of
* the walk stack for the given walk list. NULL indicates that
* the list is empty.
*
******************************************************************************/
acpi_walk_state *
acpi_ds_pop_walk_state (
acpi_walk_list *walk_list)
{
acpi_walk_state *walk_state;
FUNCTION_TRACE ("Ds_pop_walk_state");
walk_state = walk_list->walk_state;
if (walk_state) {
/* Next walk state becomes the current walk state */
walk_list->walk_state = walk_state->next;
/*
* Don't clear the NEXT field, this serves as an indicator
* that there is a parent WALK STATE
* Walk_state->Next = NULL;
*/
}
return_PTR (walk_state);
}
/*******************************************************************************
*
* FUNCTION: Acpi_ds_create_walk_state
*
* PARAMETERS: Origin - Starting point for this walk
* Walk_list - Owning walk list
*
* RETURN: Pointer to the new walk state.
*
* DESCRIPTION: Allocate and initialize a new walk state. The current walk state
* is set to this new state.
*
******************************************************************************/
acpi_walk_state *
acpi_ds_create_walk_state (
acpi_owner_id owner_id,
acpi_parse_object *origin,
acpi_operand_object *mth_desc,
acpi_walk_list *walk_list)
{
acpi_walk_state *walk_state;
acpi_status status;
FUNCTION_TRACE ("Ds_create_walk_state");
walk_state = acpi_ut_acquire_from_cache (ACPI_MEM_LIST_WALK);
if (!walk_state) {
return_PTR (NULL);
}
walk_state->data_type = ACPI_DESC_TYPE_WALK;
walk_state->owner_id = owner_id;
walk_state->origin = origin;
walk_state->method_desc = mth_desc;
walk_state->walk_list = walk_list;
/* Init the method args/local */
#ifndef _ACPI_ASL_COMPILER
acpi_ds_method_data_init (walk_state);
#endif
/* Create an initial result stack entry */
status = acpi_ds_result_stack_push (walk_state);
if (ACPI_FAILURE (status)) {
return_PTR (NULL);
}
/* Put the new state at the head of the walk list */
if (walk_list) {
acpi_ds_push_walk_state (walk_state, walk_list);
}
return_PTR (walk_state);
}
#ifndef _ACPI_ASL_COMPILER
/*******************************************************************************
*
* FUNCTION: Acpi_ds_init_aml_walk
*
* PARAMETERS: Walk_state - New state to be initialized
*
* RETURN: None
*
* DESCRIPTION: Initialize a walk state for a pass 1 or 2 parse tree walk
*
******************************************************************************/
acpi_status
acpi_ds_init_aml_walk (
acpi_walk_state *walk_state,
acpi_parse_object *op,
acpi_namespace_node *method_node,
u8 *aml_start,
u32 aml_length,
acpi_operand_object **params,
acpi_operand_object **return_obj_desc,
u32 pass_number)
{
acpi_status status;
acpi_parse_state *parser_state = &walk_state->parser_state;
FUNCTION_TRACE ("Ds_init_aml_walk");
walk_state->parser_state.aml =
walk_state->parser_state.aml_start = aml_start;
walk_state->parser_state.aml_end =
walk_state->parser_state.pkg_end = aml_start + aml_length;
/* The Next_op of the Next_walk will be the beginning of the method */
/* TBD: [Restructure] -- obsolete? */
walk_state->next_op = NULL;
walk_state->params = params;
walk_state->caller_return_desc = return_obj_desc;
status = acpi_ps_init_scope (&walk_state->parser_state, op);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
if (method_node) {
walk_state->parser_state.start_node = method_node;
walk_state->walk_type = WALK_METHOD;
walk_state->method_node = method_node;
walk_state->method_desc = acpi_ns_get_attached_object (method_node);
/* Push start scope on scope stack and make it current */
status = acpi_ds_scope_stack_push (method_node, ACPI_TYPE_METHOD, walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
/* Init the method arguments */
acpi_ds_method_data_init_args (params, MTH_NUM_ARGS, walk_state);
}
else {
/* Setup the current scope */
parser_state->start_node = parser_state->start_op->node;
if (parser_state->start_node) {
/* Push start scope on scope stack and make it current */
status = acpi_ds_scope_stack_push (parser_state->start_node,
parser_state->start_node->type, walk_state);
if (ACPI_FAILURE (status)) {
return_ACPI_STATUS (status);
}
}
}
acpi_ds_init_callbacks (walk_state, pass_number);
return_ACPI_STATUS (AE_OK);
}
#endif
/*******************************************************************************
*
* FUNCTION: Acpi_ds_delete_walk_state
*
* PARAMETERS: Walk_state - State to delete
*
* RETURN: Status
*
* DESCRIPTION: Delete a walk state including all internal data structures
*
******************************************************************************/
void
acpi_ds_delete_walk_state (
acpi_walk_state *walk_state)
{
acpi_generic_state *state;
FUNCTION_TRACE_PTR ("Ds_delete_walk_state", walk_state);
if (!walk_state) {
return;
}
if (walk_state->data_type != ACPI_DESC_TYPE_WALK) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p is not a valid walk state\n", walk_state));
return;
}
if (walk_state->parser_state.scope) {
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%p walk still has a scope list\n", walk_state));
}
/* Always must free any linked control states */
while (walk_state->control_state) {
state = walk_state->control_state;
walk_state->control_state = state->common.next;
acpi_ut_delete_generic_state (state);
}
/* Always must free any linked parse states */
while (walk_state->scope_info) {
state = walk_state->scope_info;
walk_state->scope_info = state->common.next;
acpi_ut_delete_generic_state (state);
}
/* Always must free any stacked result states */
while (walk_state->results) {
state = walk_state->results;
walk_state->results = state->common.next;
acpi_ut_delete_generic_state (state);
}
acpi_ut_release_to_cache (ACPI_MEM_LIST_WALK, walk_state);
return_VOID;
}
/******************************************************************************
*
* FUNCTION: Acpi_ds_delete_walk_state_cache
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Purge the global state object cache. Used during subsystem
* termination.
*
******************************************************************************/
void
acpi_ds_delete_walk_state_cache (
void)
{
FUNCTION_TRACE ("Ds_delete_walk_state_cache");
acpi_ut_delete_generic_cache (ACPI_MEM_LIST_WALK);
return_VOID;
}
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