Tick Chen <tick@openmoko.com>
- Copyright (C) 2008 Openmoko Inc.
+ Copyright (C) 2008 Openmoko Inc.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
General Public License for more details.
*/
-
#include "active_list.h"
#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include "libbb/libbb.h"
-void active_list_init(struct active_list *ptr) {
- INIT_LIST_HEAD(&ptr->node);
- INIT_LIST_HEAD(&ptr->depend);
- ptr->depended = NULL;
+void active_list_init(struct active_list *ptr)
+{
+ INIT_LIST_HEAD(&ptr->node);
+ INIT_LIST_HEAD(&ptr->depend);
+ ptr->depended = NULL;
}
/**
- */
-struct active_list * active_list_next(struct active_list *head, struct active_list *ptr) {
- struct active_list *next=NULL;
- if ( !head ) {
- fprintf(stderr, "active_list_next head = %p, ptr = %p invalid value!!\n", head, ptr);
- return NULL;
- }
- if ( !ptr )
- ptr = head;
- next = list_entry(ptr->node.next, struct active_list, node);
- if ( next == head ) {
- return NULL;
- }
- if ( ptr->depended && &ptr->depended->depend == ptr->node.next ) {
- return ptr->depended;
- }
- while ( next->depend.next != &next->depend ) {
- next = list_entry(next->depend.next, struct active_list, node);
- }
- return next;
+ */
+struct active_list *active_list_next(struct active_list *head,
+ struct active_list *ptr)
+{
+ struct active_list *next = NULL;
+ if (!head) {
+ opkg_msg(ERROR, "Internal error: head=%p, ptr=%p\n", head, ptr);
+ return NULL;
+ }
+ if (!ptr)
+ ptr = head;
+ next = list_entry(ptr->node.next, struct active_list, node);
+ if (next == head) {
+ return NULL;
+ }
+ if (ptr->depended && &ptr->depended->depend == ptr->node.next) {
+ return ptr->depended;
+ }
+ while (next->depend.next != &next->depend) {
+ next = list_entry(next->depend.next, struct active_list, node);
+ }
+ return next;
+}
+
+struct active_list *active_list_prev(struct active_list *head,
+ struct active_list *ptr)
+{
+ struct active_list *prev = NULL;
+ if (!head) {
+ opkg_msg(ERROR, "Internal error: head=%p, ptr=%p\n", head, ptr);
+ return NULL;
+ }
+ if (!ptr)
+ ptr = head;
+ if (ptr->depend.prev != &ptr->depend) {
+ prev = list_entry(ptr->depend.prev, struct active_list, node);
+ return prev;
+ }
+ if (ptr->depended && ptr->depended != head
+ && &ptr->depended->depend == ptr->node.prev) {
+ prev =
+ list_entry(ptr->depended->node.prev, struct active_list,
+ node);
+ } else
+ prev = list_entry(ptr->node.prev, struct active_list, node);
+ if (prev == head)
+ return NULL;
+ return prev;
}
+struct active_list *active_list_move_node(struct active_list *old_head,
+ struct active_list *new_head,
+ struct active_list *node)
+{
+ struct active_list *prev;
+ if (!old_head || !new_head || !node)
+ return NULL;
+ if (old_head == new_head)
+ return node;
+ prev = active_list_prev(old_head, node);
+ active_list_add(new_head, node);
+ return prev;
+}
+
+static void list_head_clear(struct list_head *head)
+{
+ struct active_list *next;
+ struct list_head *n, *ptr;
+ if (!head)
+ return;
+ list_for_each_safe(ptr, n, head) {
+ next = list_entry(ptr, struct active_list, node);
+ if (next->depend.next != &next->depend) {
+ list_head_clear(&next->depend);
+ }
+ active_list_init(next);
+ }
+}
-struct active_list * active_list_prev(struct active_list *head, struct active_list *ptr) {
- struct active_list *prev=NULL;
- if ( !head ) {
- fprintf(stderr, "active_list_prev head = %p, ptr = %p invalid value!!\n", head, ptr);
- return NULL;
- }
- if ( !ptr )
- ptr = head;
- if ( ptr->depend.prev != &ptr->depend ) {
- prev = list_entry(ptr->depend.prev, struct active_list, node);
- return prev;
- }
- if ( ptr->depended && ptr->depended != head && &ptr->depended->depend == ptr->node.prev ) {
- prev = list_entry(ptr->depended->node.prev, struct active_list, node);
- } else
- prev = list_entry(ptr->node.prev, struct active_list, node);
- if ( prev == head )
- return NULL;
- return prev;
+void active_list_clear(struct active_list *head)
+{
+ list_head_clear(&head->node);
+ if (head->depend.next != &head->depend) {
+ list_head_clear(&head->depend);
+ }
+ active_list_init(head);
}
-void active_list_clear(struct active_list *head) {
+void active_list_add(struct active_list *head, struct active_list *node)
+{
+ list_del_init(&node->node);
+ list_add_tail(&node->node, &head->node);
+ node->depended = head;
}
-void active_list_add_depend(struct active_list *node, struct active_list *depend) {
- list_del_init(&depend->node);
- list_add_tail(&depend->node, &node->depend);
- depend->depended = node;
+struct active_list *active_list_head_new(void)
+{
+ struct active_list *head = xcalloc(1, sizeof(struct active_list));
+ active_list_init(head);
+ return head;
}
-void active_list_add(struct active_list *head, struct active_list *node) {
- list_del_init(&node->node);
- list_add_tail(&node->node, &head->node);
- node->depended = head;
+void active_list_head_delete(struct active_list *head)
+{
+ active_list_clear(head);
+ free(head);
}