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/*
* ion/ioncore/objlist.c
*
* Copyright (c) Tuomo Valkonen 1999-2004.
*
* Ion is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*/
#include "common.h"
#include "objlist.h"
static WObjList *iter_next=NULL;
static void free_node(WObjList **objlist, WObjList *node)
{
UNLINK_ITEM(*objlist, node, next, prev);
free(node);
}
void watch_handler(WWatch *watch, WObj *obj)
{
WObjList *node=(WObjList*)watch;
WObjList **list=node->list;
if(iter_next==node)
iter_next=node->next;
free_node(list, node);
}
bool objlist_insert(WObjList **objlist, WObj *obj)
{
WObjList *node;
if(obj==NULL)
return FALSE;
node=ALLOC(WObjList);
if(node==NULL)
return FALSE;
init_watch(&(node->watch));
setup_watch(&(node->watch), obj, watch_handler);
node->list=objlist;
LINK_ITEM_FIRST(*objlist, node, next, prev);
return TRUE;
}
void objlist_remove(WObjList **objlist, WObj *obj)
{
WObjList *node=*objlist;
while(node!=NULL){
if(node->watch.obj==obj){
reset_watch(&(node->watch));
free_node(objlist, node);
return;
}
node=node->next;
}
}
void objlist_clear(WObjList **objlist)
{
while(*objlist!=NULL){
reset_watch(&((*objlist)->watch));
free_node(objlist, *objlist);
}
}
/* Warning: not thread-safe */
WObj *objlist_init_iter(WObjList *objlist)
{
if(objlist==NULL){
iter_next=NULL;
return NULL;
}
iter_next=objlist->next;
return objlist->watch.obj;
}
WObj *objlist_iter()
{
WObjList *ret;
if(iter_next==NULL)
return NULL;
ret=iter_next;
iter_next=iter_next->next;
return ret->watch.obj;
}
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