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Annotation of xinu/sys/newqueue.c, revision 1.1.1.1

1.1       root        1: /* newqueue.c  -  newqueue */
                      2: 
                      3: #include <conf.h>
                      4: #include <kernel.h>
                      5: #include <q.h>
                      6: 
                      7: /*------------------------------------------------------------------------
                      8:  * newqueue  --  initialize a new list in the q structure
                      9:  *------------------------------------------------------------------------
                     10:  */
                     11: int    newqueue()
                     12: {
                     13:        struct  qent    *hptr;          /* address of new list head     */
                     14:        struct  qent    *tptr;          /* address of new list tail     */
                     15:        int     hindex, tindex;         /* head and tail indexes        */
                     16: 
                     17:        hptr = &q[ hindex=nextqueue++ ];/* nextqueue is global variable */
                     18:        tptr = &q[ tindex=nextqueue++ ];/*  giving next used q pos.     */
                     19:        hptr->qnext = tindex;
                     20:        hptr->qprev = EMPTY;
                     21:        hptr->qkey  = MINSHORT;
                     22:        tptr->qnext = EMPTY;
                     23:        tptr->qprev = hindex;
                     24:        tptr->qkey  = MAXSHORT;
                     25:        return(hindex);
                     26: }

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