/*******************************************************************************
*
* FUNCTION: acpi_get_next_object
*
* PARAMETERS: type - Type of object to be searched for
* parent - Parent object whose children we are getting
* last_child - Previous child that was found.
* The NEXT child will be returned
* ret_handle - Where handle to the next object is placed
*
* RETURN: Status
*
* DESCRIPTION: Return the next peer object within the namespace. If Handle is
* valid, Scope is ignored. Otherwise, the first object within
* Scope is returned.
*
******************************************************************************/
acpi_status
acpi_get_next_object(acpi_object_type type,
acpi_handle parent,
acpi_handle child, acpi_handle * ret_handle)
{
acpi_status status;
struct acpi_namespace_node *node;
struct acpi_namespace_node *parent_node = NULL;
struct acpi_namespace_node *child_node = NULL;
/* Parameter validation */
if (type > ACPI_TYPE_EXTERNAL_MAX) {
return (AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return (status);
}
/* If null handle, use the parent */
if (!child) {
/* Start search at the beginning of the specified scope */
parent_node = acpi_ns_validate_handle(parent);
if (!parent_node) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
} else {
/* Non-null handle, ignore the parent */
/* Convert and validate the handle */
child_node = acpi_ns_validate_handle(child);
if (!child_node) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
}
/* Internal function does the real work */
node = acpi_ns_get_next_node_typed(type, parent_node, child_node);
if (!node) {
status = AE_NOT_FOUND;
goto unlock_and_exit;
}
if (ret_handle) {
*ret_handle = ACPI_CAST_PTR(acpi_handle, node);
}
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return (status);
}
acpi_status
acpi_get_next_object(acpi_object_type type,
acpi_handle parent,
acpi_handle child, acpi_handle * ret_handle)
{
acpi_status status;
struct acpi_namespace_node *node;
struct acpi_namespace_node *parent_node = NULL;
struct acpi_namespace_node *child_node = NULL;
if (type > ACPI_TYPE_EXTERNAL_MAX) {
return (AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE(status)) {
return (status);
}
if (!child) {
parent_node = acpi_ns_map_handle_to_node(parent);
if (!parent_node) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
} else {
child_node = acpi_ns_map_handle_to_node(child);
if (!child_node) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
}
node = acpi_ns_get_next_node_typed(type, parent_node, child_node);
if (!node) {
status = AE_NOT_FOUND;
goto unlock_and_exit;
}
if (ret_handle) {
*ret_handle = acpi_ns_convert_entry_to_handle(node);
}
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return (status);
}
