/**ltl
* 功能:获取下一个节点对象
* 参数: type ->节点类型
* parent_node ->
* child_node ->
* 返回值:
* 说明:
*/
struct acpi_namespace_node *acpi_ns_get_next_node(acpi_object_type type,
struct acpi_namespace_node
*parent_node,
struct acpi_namespace_node
*child_node)
{
struct acpi_namespace_node *next_node = NULL;
ACPI_FUNCTION_ENTRY();
/* 子节点为NULL */
if (!child_node) {
/* It's really the parent's _scope_ that we want */
if (parent_node->child) { /* 父节点的第一个子节点 */
next_node = parent_node->child;
}
}
else {
/* Start search at the NEXT node */
next_node = acpi_ns_get_next_valid_node(child_node); /* 从同伴节点中获取 */
}
/* If any type is OK, we are done */
if (type == ACPI_TYPE_ANY) {
/* next_node is NULL if we are at the end-of-list */
return (next_node);
}
/* Must search for the node -- but within this scope only */
while (next_node) { /* 下一节点不为NULL */
/* If type matches, we are done */
if (next_node->type == type) { /* 类型一致 */
return (next_node);
}
/* Otherwise, move on to the next node */
/* 获取下一个同伴节点 */
next_node = acpi_ns_get_next_valid_node(next_node);
}
/* Not found */
return (NULL);
}
struct acpi_namespace_node *acpi_ns_get_next_node_typed(acpi_object_type type,
struct
acpi_namespace_node
*parent_node,
struct
acpi_namespace_node
*child_node)
{
struct acpi_namespace_node *next_node = NULL;
ACPI_FUNCTION_ENTRY();
next_node = acpi_ns_get_next_node(parent_node, child_node);
/* If any type is OK, we are done */
if (type == ACPI_TYPE_ANY) {
/* next_node is NULL if we are at the end-of-list */
return (next_node);
}
/* Must search for the node -- but within this scope only */
while (next_node) {
/* If type matches, we are done */
if (next_node->type == type) {
return (next_node);
}
/* Otherwise, move on to the next node */
next_node = acpi_ns_get_next_valid_node(next_node);
}
/* Not found */
return (NULL);
}
