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Annotation of 43BSDTahoe/lib/libc/gen/insque.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1987 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  */
        !             6: 
        !             7: #if defined(LIBC_SCCS) && !defined(lint)
        !             8: static char sccsid[] = "@(#)insque.c   5.1 (Berkeley) 1/27/87";
        !             9: #endif LIBC_SCCS and not lint
        !            10: 
        !            11: /*
        !            12:  * insque -- vax insque instruction
        !            13:  *
        !            14:  * NOTE: this implementation is non-atomic!!
        !            15:  */
        !            16: 
        !            17: struct vaxque {                /* queue format expected by VAX queue instructions */
        !            18:        struct vaxque   *vq_next;
        !            19:        struct vaxque   *vq_prev;
        !            20: };
        !            21: 
        !            22: insque(e, prev)
        !            23:        register struct vaxque *e, *prev;
        !            24: {
        !            25:        e->vq_prev = prev;
        !            26:        e->vq_next = prev->vq_next;
        !            27:        prev->vq_next->vq_prev = e;
        !            28:        prev->vq_next = e;
        !            29: }

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