struct List

#include <exec/lists.h>

/* node types */
#define NT_UNKNOWN      0
#define NT_TASK         1       /* Exec task */
#define NT_TIMER	2
#define NT_DELAY	3	/* send only SIGF_DELAY */
#define NT_DEVICE       4
#define NT_PORT         5
#define NT_MESSAGE      6       /* Indicates message currently pending */
#define NT_FREEMSG      7
#define NT_REPLYMSG     8       /* Message has been replied */
#define NT_RESOURCE     9
#define NT_LIBRARY      10
#define NT_SEMAPHORE    11
#define NT_RESIDENT     12	/* struct Program */
#define NT_STARTUP      13      /* run at startup */

#define NT_USER         254     /* User node types work down from here */
#define NT_EXTENDED     255


struct List
{ 
    struct Node *lh_Head;
    struct Node *lh_Tail;
    struct Node *lh_TailPred;
};


struct Node
{
    struct Node *ln_Next;
    struct Node *ln_Prev;
    UBYTE	ln_Type;
    BYTE	ln_Pri;
    char        *ln_Name;
};


struct MinNode
{
    struct MinNode *lmn_Next;
    struct MinNode *lmn_Prev;
};