dllist.h

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/* **********************************************************************
 *                                  *
 * Changelog                                *
 *                                  *
 * Date     Author  Version Description             *
 *                                  *
 * 06/05/2016   MG  1.0.1   First release.              *
 * 16/07/2016   MG  1.0.2   Move towards kernel coding style.   *
 * 17/07/2016   MG  1.0.3   Remove function prototype comments. *
 * 05/11/2017   MG  1.0.4   Add Doxygen comments.           *
 * 09/11/2017   MG  1.0.5   Add SPDX license tag.           *
 * 02/01/2018   MG  1.0.6   Move to new source directory structure. *
 * 11/06/2019   MG  1.0.7   clang-format coding style changes.  *
 *              Extract find_prev and find_next from .c *
 *              file and make static inline.        *
 * 03/12/2021   MG  1.0.8   Tighten SPDX tag.           *
 * 16/09/2022   MG  1.0.9   Rename of portability.h         *
 *              Add stddef.h for size_t.        *
 *                                  *
 ************************************************************************
 */

#ifndef DLLIST_H
#define DLLIST_H

#include <libmgec/mge-portability.h>

#include <stddef.h>

BEGIN_C_DECLS

struct dllistnode {
    void *object;            
    struct dllistnode *prevnode; 
    struct dllistnode *nextnode; 
};

struct dllistnode *add_dll_node(struct dllistnode *currentnode,
                const void *object, size_t objsize);

static inline struct dllistnode *
find_prev_dll_node(struct dllistnode *currentnode)
{
    return currentnode->prevnode;
}

static inline struct dllistnode *
find_next_dll_node(struct dllistnode *currentnode)
{
    return currentnode->nextnode;
}

struct dllistnode *free_dllist(struct dllistnode *currentnode);

END_C_DECLS

#endif /* ndef DLLIST_H */