libRASCH

00001 
00009 /*----------------------------------------------------------------------------
00010  *
00011  * Copyright (C) 2002-2003, Raphael Schneider
00012  * See the file COPYING for information on usage and redistribution.
00013  *
00014  * $Header: /home/cvs_repos/librasch/include/ra_linked_list.h,v 1.4 2004/02/19 14:42:12 rasch Exp $
00015  *
00016  *--------------------------------------------------------------------------*/
00017 
00018 #ifndef RA_LINKED_LIST_H
00019 #define RA_LINKED_LIST_H
00020 
00021 #ifdef __cplusplus
00022 extern "C" {
00023 #endif
00024 
00025 #include <ra.h>
00026 
00027 /*
00028   struct's which are handled with this functions must have the following format:
00029 
00030   first field: used to identify struct (not used in linked-list)
00031   second field: pointer to next struct
00032   third field: pointer to previous struct
00033 
00034   
00035   The remaining fields contain the struct-specific data and are not accessed with
00036   this functions.
00037 */
00038 
00049 struct linked_list
00050 {
00051         unsigned short not_used; /* some list-elements are returned to user-space as handles,
00052                                     the type of the handle are set in this var */
00053 
00054         struct linked_list *next;
00055         struct linked_list *prev;
00056 };                              /* struct linked_list */
00057 
00058 
00059 /* TODO: think about if these prototypes should be moved to ra.h */
00060 LIBRAAPI int ra_list_add(void **head, void *item);
00061 LIBRAAPI int ra_list_insert(void **head, void *prev, void *item);
00062 LIBRAAPI int ra_list_del(void **head, void *item);
00063 LIBRAAPI int ra_list_len(void *head);
00064 
00065 #ifdef __cplusplus
00066 }
00067 #endif
00068 
00069 #endif /* RA_LINKED_LIST_H */
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ra_linked_list.h
